falsedesktopWTM2020-09-30000077686720000036{"tbl_sim": "https://q10k.com/tbl-sim", "search": "https://q10k.com/search"}{"q10k_tbl_0": "Bermuda\t\n(State or other jurisdiction of incorporation or organization)\t94-2708455\n23 South Main Street Suite 3B\t(I.R.S. Employer Identification No.)\nHanover\t03755-2053\nNew Hampshire\t(Zip Code)\n(Address of principal executive offices)\t\n", "q10k_tbl_1": "\t\tPage No.\nPART I.\tFINANCIAL INFORMATION\t\nItem 1.\tFinancial Statements (Unaudited)\t\n\tConsolidated Balance Sheets September 30 2020 and December 31 2019\t1\n\tConsolidated Statements of Operations and Comprehensive Income\t\n\tThree and Nine Months Ended September 30 2020 and 2019\t3\n\tConsolidated Statements of Changes in Equity\t6\n\tThree and Nine Months Ended September 30 2020 and 2019\t\n\tConsolidated Statements of Cash Flows Nine Months Ended September 30 2020 and 2019\t8\n\tNotes to Consolidated Financial Statements\t9\nItem 2.\tManagement's Discussion and Analysis of Financial Condition and Results of Operations\t49\n\tResults of Operations for the Three and Nine Months Ended September 30 2020 and 2019\t49\n\tLiquidity and Capital Resources\t72\n\tNon-GAAP Financial Measures\t78\n\tCritical Accounting Estimates\t81\n\tForward-Looking Statements\t86\nItem 3.\tQuantitative and Qualitative Disclosures About Market Risk\t86\nItem 4.\tControls and Procedures\t87\nPART II.\tOTHER INFORMATION\t87\nItems 1 through 6.\t\t87\nSIGNATURES\t\t88\n", "q10k_tbl_2": "\tSeptember 30 2020\tDecember 31 2019\nMillions except share and per share amounts\t\nAssets\tUnaudited\t\nFinancial Guarantee (HG Global/BAM)\t\t\nFixed maturity investments at fair value\t831.8\t799.3\nShort-term investments at fair value\t56.1\t46.3\nTotal investments\t887.9\t845.6\nCash\t49.9\t24.2\nInsurance premiums receivable\t7.2\t6.7\nDeferred acquisition costs\t26.1\t22.1\nAccrued investment income\t5.2\t5.4\nAccounts receivable on unsettled investment sales\t0\t3.9\nOther assets\t15.0\t16.1\nTotal Financial Guarantee assets\t991.3\t924.0\nSpecialty Insurance Distribution (NSM)\t\t\nCash (restricted $82.9 and $56.3)\t125.0\t89.7\nPremiums and commissions receivable\t67.7\t70.8\nGoodwill and other intangible assets\t730.3\t623.0\nOther assets\t57.2\t41.7\nTotal Specialty Insurance Distribution assets\t980.2\t825.2\nAsset Management (Kudu)\t\t\nShort-term investments at fair value\t.1\t.1\nOther long-term investments\t325.5\t266.5\nTotal investments\t325.6\t266.6\nCash\t8.4\t5.8\nAccrued investment income\t6.2\t5.8\nGoodwill and other intangible assets\t9.3\t9.6\nOther assets\t2.4\t2.7\nTotal Asset Management assets\t351.9\t290.5\nOther Operations\t\t\nFixed maturity investments at fair value\t389.7\t406.5\nShort-term investments at fair value\t515.6\t154.8\nCommon equity securities at fair value\t140.7\t683.9\nOther long-term investments\t845.7\t589.8\nTotal investments\t1891.7\t1835.0\nCash\t31.5\t41.3\nAccrued investment income\t2.8\t5.7\nAccounts receivable on unsettled investment sales\t54.7\t5.1\nGoodwill and other intangible assets\t36.7\t22.1\nOther assets\t41.9\t31.3\nAssets held for sale\t.7\t3.0\nTotal Other Operations assets\t2060.0\t1943.5\nTotal assets\t4383.4\t3983.2\n", "q10k_tbl_3": "\tSeptember 30 2020\tDecember 31 2019\nMillions except share and per share amounts\t\nLiabilities\tUnaudited\t\nFinancial Guarantee (HG Global/BAM)\t\t\nUnearned insurance premiums\t226.9\t198.4\nAccrued incentive compensation\t19.4\t21.7\nAccounts payable on unsettled investment purchases\t6.4\t0\nOther liabilities\t27.8\t26.7\nTotal Financial Guarantee liabilities\t280.5\t246.8\nSpecialty Insurance Distribution (NSM)\t\t\nDebt\t270.2\t219.2\nPremiums payable\t116.9\t102.3\nContingent consideration earnout liabilities\t11.8\t20.6\nOther liabilities\t77.5\t59.0\nTotal Specialty Insurance Distribution liabilities\t476.4\t401.1\nAsset Management (Kudu)\t\t\nDebt\t71.0\t53.6\nOther liabilities\t10.2\t3.4\nTotal Asset Management liabilities\t81.2\t57.0\nOther Operations\t\t\nDebt\t18.2\t10.7\nAccrued incentive compensation\t41.9\t55.1\nOther liabilities\t176.0\t67.8\nTotal Other Operations liabilities\t236.1\t133.6\nTotal liabilities\t1074.2\t838.5\nEquity\t\t\nWhite Mountains's common shareholders' equity\t\t\nWhite Mountains's common shares at $1 par value per share-authorized 50000000 shares; issued and outstanding 3102011 and 3185353 shares and paid-in surplus\t592.1\t596.3\nPaid-in surplus\t\t\nRetained earnings\t2822.1\t2672.4\nAccumulated other comprehensive loss after-tax:\t\t\nNet unrealized foreign currency translation and interest rate swap losses\t(6.5)\t(7.2)\nTotal White Mountains's common shareholders' equity\t3407.7\t3261.5\nNon-controlling interests\t(98.5)\t(116.8)\nTotal equity\t3309.2\t3144.7\nTotal liabilities and equity\t4383.4\t3983.2\n", "q10k_tbl_4": "\tThree Months Ended September 30\t\tNine Months Ended September 30\t\nMillions\t2020\t2019\t2020\t2019\nRevenues:\t\t\t\t\nFinancial Guarantee (HG Global/BAM)\t\t\t\t\nEarned insurance premiums\t6.2\t5.2\t17.2\t13.7\nNet investment income\t4.7\t5.4\t15.1\t16.1\nNet realized and unrealized investment gains\t3.2\t7.1\t23.7\t30.4\nOther revenues\t.4\t.3\t2.1\t1.3\nTotal Financial Guarantee revenues\t14.5\t18.0\t58.1\t61.5\nSpecialty Insurance Distribution (NSM)\t\t\t\t\nCommission revenues\t58.2\t49.4\t174.2\t147.6\nOther revenues\t12.5\t10.5\t37.6\t27.7\nTotal Specialty Insurance Distribution revenues\t70.7\t59.9\t211.8\t175.3\nAsset Management (Kudu)\t\t\t\t\nNet investment income\t6.4\t4.6\t19.3\t8.6\nNet realized and unrealized investment gains\t9.8\t2.7\t1.5\t3.1\nOther revenues\t.1\t.2\t.2\t.2\nTotal Asset Management revenues\t16.3\t7.5\t21.0\t11.9\nMarketing Technology (MediaAlpha)\t\t\t\t\nAdvertising and commission revenues\t0\t0\t0\t48.8\nTotal Marketing Technology revenues\t0\t0\t0\t48.8\nOther Operations\t\t\t\t\nNet investment income\t60.1\t8.4\t79.3\t30.7\nNet realized and unrealized investment gains\t293.6\t57.2\t277.6\t199.6\nRealized gain and unrealized investment gain from the MediaAlpha Transaction\t0\t0\t0\t182.2\nAdvertising and commission revenues\t2.1\t1.9\t6.1\t4.5\nOther revenues\t2.2\t2.6\t6.0\t3.6\nTotal Other Operations revenues\t358.0\t70.1\t369.0\t420.6\nTotal revenues\t459.5\t155.5\t659.9\t718.1\n", "q10k_tbl_5": "\tThree Months Ended September 30\t\tNine Months Ended September 30\t\nMillions\t2020\t2019\t2020\t2019\nExpenses:\t\t\t\t\nFinancial Guarantee (HG Global/BAM)\t\t\t\t\nInsurance acquisition expenses\t1.6\t1.4\t5.4\t4.1\nOther underwriting expenses\t.1\t.1\t.3\t.3\nGeneral and administrative expenses\t13.9\t12.5\t41.1\t39.1\nTotal Financial Guarantee expenses\t15.6\t14.0\t46.8\t43.5\nSpecialty Insurance Distribution (NSM)\t\t\t\t\nGeneral and administrative expenses\t42.9\t33.3\t131.0\t91.4\nBroker commission expenses\t17.1\t15.3\t56.4\t48.9\nChange in fair value of contingent consideration earnout liabilities\t.7\t(2.0)\t(1.6)\t5.6\nAmortization of other intangible assets\t5.1\t4.4\t16.2\t13.5\nInterest expense\t6.1\t4.4\t16.1\t12.2\nTotal Specialty Insurance Distribution expenses\t71.9\t55.4\t218.1\t171.6\nAsset Management (Kudu)\t\t\t\t\nGeneral and administrative expenses\t2.2\t4.5\t7.5\t6.7\nAmortization of other intangible assets\t.1\t.2\t.3\t.2\nInterest expense\t1.4\t0\t4.3\t0\nTotal Asset Management expenses\t3.7\t4.7\t12.1\t6.9\nMarketing Technology (MediaAlpha)\t\t\t\t\nCost of sales\t0\t0\t0\t40.6\nGeneral and administrative expenses\t0\t0\t0\t12.5\nAmortization of other intangible assets\t0\t0\t0\t1.6\nInterest expense\t0\t0\t0\t.2\nTotal Marketing Technology expenses\t0\t0\t0\t54.9\nOther Operations\t\t\t\t\nCost of sales\t2.3\t2.3\t6.5\t5.0\nGeneral and administrative expenses\t44.3\t27.7\t87.1\t87.2\nAmortization of other intangible assets\t.2\t0\t.6\t.1\nInterest expense\t.3\t.3\t.8\t.3\nTotal Other Operations expenses\t47.1\t30.3\t95.0\t92.6\nTotal expenses\t138.3\t104.4\t372.0\t369.5\nPre-tax income from continuing operations\t321.2\t51.1\t287.9\t348.6\nIncome tax expense\t(98.5)\t(8.8)\t(97.1)\t(18.9)\nNet income from continuing operations\t222.7\t42.3\t190.8\t329.7\nNet (loss) income from sale of discontinued operations net of tax\t(.7)\t.9\t(.8)\t1.6\nNet income\t222.0\t43.2\t190.0\t331.3\nNet loss attributable to non-controlling interests\t10.9\t5.5\t29.5\t22.3\nNet income attributable to White Mountains's common shareholders\t232.9\t48.7\t219.5\t353.6\n", "q10k_tbl_6": "\tThree Months Ended September 30\t\tNine Months Ended September 30\t\nMillions\t2020\t2019\t2020\t2019\nNet income attributable to White Mountains's common shareholders\t232.9\t48.7\t219.5\t353.6\nOther comprehensive income (loss) net of tax\t3.9\t(2.4)\t1.0\t(5.8)\nComprehensive income\t236.8\t46.3\t220.5\t347.8\nOther Comprehensive (income) loss attributable to non-controlling interests\t(.1)\t.1\t(.3)\t.3\nComprehensive income attributable to White Mountains's common shareholders\t236.7\t46.4\t220.2\t348.1\n", "q10k_tbl_7": "Earnings (loss) per share attributable to White Mountains's common shareholders:\t\t\t\t\nBasic earnings (loss) per share\t\t\t\t\nContinuing operations\t75.32\t15.01\t70.40\t110.67\nDiscontinued operations\t(.23)\t.28\t(.26)\t.50\nTotal consolidated operations\t75.09\t15.29\t70.14\t111.17\nDiluted earnings (loss) per share\t\t\t\t\nContinuing operations\t75.32\t15.01\t70.40\t110.67\nDiscontinued operations\t(.23)\t.28\t(.26)\t.50\nTotal consolidated operations\t75.09\t15.29\t70.14\t111.17\nDividends declared and paid per White Mountains's common share\t0\t0\t1.00\t1.00\n", "q10k_tbl_8": "\tWhite Mountains's Common Shareholders' Equity\t\t\t\t\t\nMillions\tCommon shares and paid-in surplus\tRetained earnings\tAOCI after tax\tTotal\tNon-controlling interest\tTotal Equity\nBalance at June 30 2020\t587.0\t2589.3\t(10.3)\t3166.0\t(102.7)\t3063.3\nNet income (loss)\t0\t232.9\t0\t232.9\t(10.9)\t222.0\nNet change in foreign currency translation and other\t0\t0\t3.8\t3.8\t.2\t4.0\nTotal comprehensive income (loss)\t0\t232.9\t3.8\t236.7\t(10.7)\t226.0\nDividends to non-controlling interests\t0\t0\t0\t0\t(.9)\t(.9)\nRepurchases and retirements of common shares\t0\t(.1)\t0\t(.1)\t0\t(.1)\nIssuances of common shares\t.2\t0\t0\t.2\t0\t.2\nCapital contributions from BAM members net of tax\t0\t0\t0\t0\t15.4\t15.4\nNet contributions and dilution from other non-controlling interests\t.3\t0\t0\t.3\t(.4)\t(.1)\nAmortization of restricted share awards\t3.6\t0\t0\t3.6\t0\t3.6\nAcquisition of non-controlling interests\t0\t0\t0\t0\t.8\t.8\nRecognition of equity-based compensation expense of subsidiary\t1.0\t0\t0\t1.0\t0\t1.0\nBalance at September 30 2020\t592.1\t2822.1\t(6.5)\t3407.7\t(98.5)\t3309.2\n", "q10k_tbl_9": "\tWhite Mountains's Common Shareholders' Equity\t\t\t\t\t\nMillions\tCommon shares and paid-in surplus\tRetained earnings\tAOCI after tax\tTotal\tNon-controlling interest\tTotal Equity\nBalance at January 1 2020\t596.3\t2672.4\t(7.2)\t3261.5\t(116.8)\t3144.7\nNet income (loss)\t0\t219.5\t0\t219.5\t(29.5)\t190.0\nNet change in foreign currency translation and other\t0\t0\t.7\t.7\t.3\t1.0\nTotal comprehensive income (loss)\t0\t219.5\t.7\t220.2\t(29.2)\t191.0\nDividends declared on common shares\t0\t(3.2)\t0\t(3.2)\t0\t(3.2)\nDividends to non-controlling interests\t0\t0\t0\t0\t(2.3)\t(2.3)\nRepurchases and retirements of common shares\t(18.6)\t(66.6)\t0\t(85.2)\t0\t(85.2)\nIssuances of common shares\t1.5\t0\t0\t1.5\t0\t1.5\nCapital contributions from BAM members net of tax\t0\t0\t0\t0\t46.9\t46.9\nNet contributions and dilution from other non-controlling interests\t(.4)\t0\t0\t(.4)\t2.1\t1.7\nAmortization of restricted share awards\t12.3\t0\t0\t12.3\t0\t12.3\nAcquisition of non-controlling interests\t0\t0\t0\t0\t.8\t.8\nRecognition of equity-based compensation expense of subsidiary\t1.0\t0\t0\t1.0\t0\t1.0\nBalance at September 30 2020\t592.1\t2822.1\t(6.5)\t3407.7\t(98.5)\t3309.2\n", "q10k_tbl_10": "\tWhite Mountains's Common Shareholders' Equity\t\t\t\t\t\nMillions\tCommon shares and paid-in surplus\tRetained earnings\tAOCI after tax\tTotal\tNon-controlling interest\tTotal Equity\nBalance at June 30 2019\t590.5\t2562.8\t(9.0)\t3144.3\t(136.4)\t3007.9\nNet income (loss)\t0\t48.7\t0\t48.7\t(5.5)\t43.2\nNet change in foreign currency translation and other\t0\t0\t(2.3)\t(2.3)\t(.1)\t(2.4)\nTotal comprehensive income (loss)\t0\t48.7\t(2.3)\t46.4\t(5.6)\t40.8\nDividends to non-controlling interests\t0\t0\t0\t0\t(.6)\t(.6)\nCapital contributions from BAM members net of tax\t0\t0\t0\t0\t19.3\t19.3\nNet contributions from other non-controlling interests\t0\t0\t0\t0\t.8\t.8\nAmortization of restricted share awards\t2.7\t0\t0\t2.7\t0\t2.7\nBalance at September 30 2019\t593.2\t2611.5\t(11.3)\t3193.4\t(122.5)\t3070.9\n", "q10k_tbl_11": "\tWhite Mountains's Common Shareholders' Equity\t\t\t\t\t\nMillions\tCommon shares and paid-in surplus\tRetained earnings\tAOCI after tax\tTotal\tNon-controlling interest\tTotal Equity\nBalance at January 1 2019\t584.0\t2264.9\t(5.8)\t2843.1\t(124.9)\t2718.2\nNet income (loss)\t0\t353.6\t0\t353.6\t(22.3)\t331.3\nNet change in foreign currency translation and other\t0\t0\t(5.5)\t(5.5)\t(.3)\t(5.8)\nTotal comprehensive income (loss)\t0\t353.6\t(5.5)\t348.1\t(22.6)\t325.5\nDividends declared on common shares\t0\t(3.2)\t0\t(3.2)\t0\t(3.2)\nDividends to non-controlling interests\t0\t0\t0\t0\t(1.6)\t(1.6)\nRepurchases and retirements of common shares\t(1.1)\t(3.8)\t0\t(4.9)\t0\t(4.9)\nIssuances of common shares\t2.2\t0\t0\t2.2\t0\t2.2\nCapital contributions from BAM members net of tax\t0\t0\t0\t0\t36.3\t36.3\nNet contributions from other non-controlling interests\t0\t0\t0\t0\t2.3\t2.3\nAmortization of restricted share awards\t7.8\t0\t0\t7.8\t0\t7.8\nAcquisition of non-controlling interests\t0\t0\t0\t0\t1.8\t1.8\nEffect of deconsolidation of MediaAlpha\t0\t0\t0\t0\t(13.8)\t(13.8)\nRecognition of equity-based compensation expense of subsidiary\t.3\t0\t0\t.3\t0\t.3\nBalance at September 30 2019\t593.2\t2611.5\t(11.3)\t3193.4\t(122.5)\t3070.9\n", "q10k_tbl_12": "\tNine Months Ended September 30\t\nMillions\t2020\t2019\nCash flows from operations:\t\t\nNet income\t190.0\t331.3\nAdjustments to reconcile net income to net cash used for operations:\t\t\nNet realized and unrealized investment gains\t(302.8)\t(347.8)\nRealized gain from the MediaAlpha Transaction\t0\t(67.5)\nDeferred income tax expense\t87.9\t11.4\nNet gain from sale of discontinued operations net of tax\t.8\t(1.6)\nAmortization of restricted share and option awards\t12.2\t8.3\nAmortization and depreciation\t27.2\t19.8\nOther operating items:\t\t\nNet change in premiums and commissions receivable\t6.0\t(9.4)\nNet change in premiums payable\t5.3\t15.4\nNet change in unearned insurance premiums\t28.6\t27.5\nNet change in deferred acquisition costs\t(4.0)\t(2.4)\nNet change in restricted cash\t26.6\t17.0\nInvestments in Kudu Participation Contracts\t(57.5)\t(74.4)\nNet change in other assets and liabilities net\t(8.1)\t(.1)\nNet cash provided from (used for) operations\t12.2\t(72.5)\nCash flows from investing activities:\t\t\nNet change in short-term investments\t(370.3)\t(54.5)\nSales of fixed maturity and convertible investments\t293.2\t292.6\nMaturities calls and paydowns of fixed maturity and convertible investments\t135.2\t92.7\nSales of common equity securities\t582.9\t442.1\nDistributions and redemptions of other long-term investments and settlements of forward contracts\t64.5\t28.7\nPurchases of other long-term investments\t(61.0)\t(173.0)\nPurchases of common equity securities\t(33.8)\t(4.8)\nPurchases of fixed maturity and convertible investments\t(411.3)\t(428.0)\nPurchases of consolidated subsidiaries net of cash acquired of $13.4 and $12.8\t(129.4)\t(243.4)\nOther investing activities net\t(42.0)\t(12.9)\nNet cash provided from (used for) investing activities\t28.0\t(60.5)\nCash flows from financing activities:\t\t\nDraw down of debt and revolving line of credit\t69.4\t149.4\nRepayment of debt and revolving line of credit\t(2.7)\t(22.2)\nCash dividends paid to the Company's common shareholders\t(3.2)\t(3.2)\nCommon shares repurchased\t(78.5)\t0\nDistribution to non-controlling interest shareholders\t(1.2)\t(27.7)\nPayments on contingent consideration earnout liabilities\t(7.0)\t(2.6)\nRepurchase of shares from non-controlling interest shareholders\t0\t(21.1)\nProceeds from issuance of shares to non-controlling interest shareholders\t0\t62.7\nCapital contributions to non-controlling interest shareholders\t2.2\t1.6\nCapital contributions from BAM members\t46.9\t42.9\nFidus Re premium payment\t(2.3)\t(2.2)\nOther financing activities net\t(9.8)\t(4.9)\nNet cash provided from financing activities\t13.8\t172.7\nEffect of exchange rate changes on cash\t(.2)\t(.8)\nNet change in cash during the period - continuing operations including the effect of exchange rate changes\t53.8\t38.9\nCash balances at beginning of period (includes restricted cash balances of $56.3 and $50.0)\t161.0\t110.3\nCash balances at end of period (includes restricted cash balances of $82.9 and $67.0)\t214.8\t149.2\nSupplemental cash flows information:\t\t\nInterest paid\t(11.4)\t(11.7)\nNet income tax payments\t(.1)\t(.3)\n", "q10k_tbl_13": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nFixed maturity investments\t7.0\t8.0\t22.4\t24.4\nShort-term investments\t.1\t1.3\t1.0\t3.9\nCommon equity securities\t.5\t2.5\t6.5\t10.8\nOther long-term investments\t63.9\t7.0\t84.7\t17.4\nTotal investment income\t71.5\t18.8\t114.6\t56.5\nThird-party investment expenses\t(.3)\t(.4)\t(.9)\t(1.1)\nNet investment income pre-tax\t71.2\t18.4\t113.7\t55.4\n", "q10k_tbl_14": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nFixed maturity investments\t3.6\t8.9\t35.8\t46.9\nShort-term investments\t0\t0\t.4\t.3\nCommon equity securities\t48.4\t2.4\t5.9\t141.5\nOther long-term investments (1) (2)(3)\t254.6\t55.7\t260.7\t159.1\nNet realized and unrealized investment gains\t306.6\t67.0\t302.8\t347.8\nLess: net gains on investment securities sold during the period\t36.1\t0\t29.6\t12.4\nNet realized and unrealized investment gains on investment securities held at the end of the period\t270.5\t67.0\t273.2\t335.4\n", "q10k_tbl_15": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nOther long-term investments\t260.1\t54.4\t276.0\t154.4\nTotal net unrealized investment gains (losses) pre-tax - Level 3 investments\t260.1\t54.4\t276.0\t154.4\n", "q10k_tbl_16": "\tSeptember 30 2020\t\t\t\nMillions\tCost or Amortized Cost\tGross Unrealized Gains\tGross Unrealized Losses\tCarrying Value\nU.S. Government and agency obligations\t206.2\t4.4\t0\t210.6\nDebt securities issued by corporations\t505.4\t24.0\t(.7)\t528.7\nMunicipal obligations\t251.0\t20.4\t(.1)\t271.3\nMortgage and asset-backed securities\t203.6\t7.3\t0\t210.9\nTotal fixed maturity investments\t1166.2\t56.1\t(.8)\t1221.5\n", "q10k_tbl_17": "\tDecember 31 2019\t\t\t\nMillions\tCost or Amortized Cost\tGross Unrealized Gains\tGross Unrealized Losses\tCarrying Value\nU.S. Government and agency obligations\t231.7\t1.0\t(.2)\t232.5\nDebt securities issued by corporations\t454.9\t12.5\t(.2)\t467.2\nMunicipal obligations\t284.7\t12.5\t(.1)\t297.1\nMortgage and asset-backed securities\t206.6\t2.7\t(.3)\t209.0\nTotal fixed maturity investments\t1177.9\t28.7\t(.8)\t1205.8\n", "q10k_tbl_18": "\tSeptember 30 2020\t\t\t\t\nMillions\tCost or Amortized Cost\tGross Unrealized Gains\tGross Unrealized Losses\tNet Foreign Currency Losses\tCarrying Value\nCommon equity securities\t124.2\t16.5\t0\t0\t140.7\nOther long-term investments\t696.4\t552.4\t(76.1)\t(1.5)\t1171.2\n", "q10k_tbl_19": "\tDecember 31 2019\t\t\t\t\nMillions\tCost or Amortized Cost\tGross Unrealized Gains\tGross Unrealized Losses\tNet Foreign Currency Losses\tCarrying Value\nCommon equity securities\t553.3\t130.6\t0\t0\t683.9\nOther long-term investments\t667.4\t255.2\t(64.1)\t(2.2)\t856.3\n", "q10k_tbl_20": "\tFair Value at\t\nMillions\tSeptember 30 2020\tDecember 31 2019\nAAA\t11.2\t9.5\nAA\t58.2\t73.9\nA\t307.7\t288.5\nBBB\t150.0\t95.3\nBB\t1.6\t0\nDebt securities issued by corporations (1)\t528.7\t467.2\n", "q10k_tbl_21": "\tSeptember 30 2020\t\t\tDecember 31 2019\t\t\nMillions\tFair Value\tLevel 2\tLevel 3\tFair Value\tLevel 2\tLevel 3\nMortgage-backed securities:\t\t\t\t\t\t\nAgency:\t\t\t\t\t\t\nFNMA\t84.5\t84.5\t0\t88.6\t88.6\t0\nFHLMC\t67.1\t67.1\t0\t60.5\t60.5\t0\nGNMA\t37.4\t37.4\t0\t30.8\t30.8\t0\nTotal agency (1)\t189.0\t189.0\t0\t179.9\t179.9\t0\nTotal mortgage-backed securities\t189.0\t189.0\t0\t179.9\t179.9\t0\nOther asset-backed securities:\t\t\t\t\t\t\nCredit card receivables\t11.3\t11.3\t0\t14.0\t14.0\t0\nVehicle receivables\t10.6\t10.6\t0\t15.1\t15.1\t0\nTotal other asset-backed securities\t21.9\t21.9\t0\t29.1\t29.1\t0\nTotal mortgage and asset-backed securities\t210.9\t210.9\t0\t209.0\t209.0\t0\n", "q10k_tbl_22": "\tCarrying Value at\t\nMillions\tSeptember 30 2020\tDecember 31 2019\nMediaAlpha (1)\t475.0\t180.0\nKudu's Participation Contracts (1)\t325.5\t266.5\nPassportCard/DavidShield (1)\t95.0\t90.0\nElementum Holdings L.P. (1)\t55.1\t55.1\nOther unconsolidated entities (1)(2)\t31.8\t33.7\nTotal unconsolidated entities (1)\t982.4\t625.3\nPrivate equity funds and hedge funds\t118.2\t161.1\nInsurance-linked securities funds\t52.7\t41.2\nPrivate debt investments (3)\t17.9\t28.7\nTotal other long-term investments\t1171.2\t856.3\n", "q10k_tbl_23": "\tSeptember 30 2020\t\tDecember 31 2019\t\nMillions\tFair Value\tUnfunded Commitments\tFair Value\tUnfunded Commitments\nPrivate equity funds\t\t\t\t\nAerospace/Defense/Government\t59.4\t16.1\t33.8\t23.3\nManufacturing/Industrial\t39.8\t2.0\t57.7\t4.1\nFinancial services\t19.0\t23.4\t15.0\t22.8\nTotal private equity funds\t118.2\t41.5\t106.5\t50.2\nHedge funds\t\t\t\t\nLong/short banks and financials\t0\t0\t54.6\t0\nTotal hedge funds\t0\t0\t54.6\t0\nTotal private equity funds and hedge funds included in other long-term investments\t118.2\t41.5\t161.1\t50.2\n", "q10k_tbl_24": "Millions\t1 - 3 years\t3 - 5 years\t5 - 10 years\t>10 years\tTotal\nPrivate equity funds - expected lock-up period remaining\t4.7\t36.4\t71.7\t5.4\t118.2\n", "q10k_tbl_25": "\tSeptember 30 2020\t\t\t\nMillions\tFair Value\tLevel 1\tLevel 2\tLevel 3\nFixed maturity investments:\t\t\t\t\nU.S. Government and agency obligations\t210.6\t210.6\t0\t0\nDebt securities issued by corporations:\t\t\t\t\nFinancials\t142.9\t0\t142.9\t0\nTechnology\t68.5\t0\t68.5\t0\nIndustrial\t61.5\t0\t61.5\t0\nConsumer\t60.7\t0\t60.7\t0\nHealthcare\t49.3\t0\t49.3\t0\nCommunications\t42.3\t0\t42.3\t0\nEnergy\t38.9\t0\t38.9\t0\nMaterials\t37.4\t0\t37.4\t0\nUtilities\t27.2\t0\t27.2\t0\nTotal debt securities issued by corporations\t528.7\t0\t528.7\t0\nMunicipal obligations\t271.3\t0\t271.3\t0\nMortgage and asset-backed securities\t210.9\t0\t210.9\t0\nTotal fixed maturity investments\t1221.5\t210.6\t1010.9\t0\nShort-term investments (1)\t571.8\t570.6\t1.2\t0\nCommon equity securities:\t\t\t\t\nExchange traded funds\t84.7\t84.7\t0\t0\nOther (2)\t56.0\t0\t55.9\t.1\nTotal common equity securities\t140.7\t84.7\t55.9\t.1\nOther long-term investments\t1000.3\t0\t0\t1000.3\nOther long-term investments - NAV (3)\t170.9\t0\t0\t0\nTotal investments\t3105.2\t865.9\t1068.0\t1000.4\n", "q10k_tbl_26": "\tDecember 31 2019\t\t\t\nMillions\tFair Value\tLevel 1\tLevel 2\tLevel 3\nFixed maturity investments:\t\t\t\t\nU.S. Government and agency obligations\t232.5\t232.5\t0\t0\nDebt securities issued by corporations:\t\t\t\t\nFinancials\t144.8\t0\t144.8\t0\nIndustrial\t59.0\t0\t59.0\t0\nHealthcare\t52.6\t0\t52.6\t0\nConsumer\t50.9\t0\t50.9\t0\nEnergy\t44.9\t0\t44.9\t0\nTechnology\t41.2\t0\t41.2\t0\nCommunications\t31.3\t0\t31.3\t0\nUtilities\t25.0\t0\t25.0\t0\nMaterials\t17.5\t0\t17.5\t0\nTotal debt securities issued by corporations\t467.2\t0\t467.2\t0\nMunicipal obligations\t297.1\t0\t297.1\t0\nMortgage and asset-backed securities\t209.0\t0\t209.0\t0\nTotal fixed maturity investments\t1205.8\t232.5\t973.3\t0\nShort-term investments (1)\t201.2\t189.4\t11.8\t0\nCommon equity securities:\t\t\t\t\nExchange traded funds (2)\t536.4\t521.6\t14.8\t0\nOther (3)\t147.5\t25.9\t121.5\t.1\nTotal common equity securities\t683.9\t547.5\t136.3\t.1\nOther long-term investments\t654.0\t0\t0\t654.0\nOther long-term investments - NAV (4)\t202.3\t0\t0\t0\nTotal investments\t2947.2\t969.4\t1121.4\t654.1\n", "q10k_tbl_27": "\t\t\tLevel 3 Investments\t\tOther Long-term Investments Measured at NAV (2)\t\t\nMillions\tLevel 1 Investments\tLevel 2 Investments\tCommon Equity Securities\tOther Long-term Investments\tTotal\t\nBalance at December 31 2019\t780.0\t1109.6\t.1\t654.0\t202.3\t2746.0\t(1)\nNet realized and unrealized gains (losses)\t29.2\t12.5\t0\t275.6\t(14.9)\t302.4\t(3)\nAmortization/Accretion\t0\t(3.0)\t0\t0\t0\t(3.0)\t\nPurchases\t128.8\t316.2\t0\t78.8\t39.8\t563.6\t\nSales\t(642.7)\t(368.5)\t0\t(8.1)\t(56.3)\t(1075.6)\t\nTransfers in\t0\t0\t0\t0\t0\t0\t\nTransfers out\t0\t0\t0\t0\t0\t0\t\nBalance at September 30 2020\t295.3\t1066.8\t.1\t1000.3\t170.9\t2533.4\t(1)\n", "q10k_tbl_28": "\t\t\tLevel 3 Investments\tOther Long-term Investments Measured at NAV (35)\t\t\nMillions\tLevel 1 Investments\tLevel 2 Investments\tOther Long-term Investments\tTotal\t\nBalance at December 31 2018\t842.6\t1160.5\t138.7\t186.9\t2328.7\t(1)\nNet realized and unrealized gains\t121.8\t66.6\t154.2\t4.9\t347.5\t(2 4)\nAmortization/Accretion\t.2\t(1.2)\t0\t0\t(1.0)\t\nPurchases\t101.4\t331.3\t211.3\t106.4\t750.4\t(6)\nSales\t(362.3)\t(465.2)\t0\t(28.7)\t(856.2)\t\nTransfers in\t0\t0\t82.6\t0\t82.6\t\nTransfers out\t0\t0\t0\t(82.6)\t(82.6)\t\nBalance at September 30 2019\t703.7\t1092.0\t586.8\t186.9\t2569.4\t(1)\n", "q10k_tbl_29": " in Millions\tSeptember 30 2020\t\t\t\nDescription\tValuation Technique(s)\tFair Value (5)\tUnobservable Inputs (6)\t\nMediaAlpha\tProbability-weighted expected return method\t475.0\tWeight ascribed to IPO\t65%\n\t\t\tForward Revenue Exit Multiple\t2x\n\t\t\tWeight ascribed to remaining private\t35%\n\t\t\tDiscount Rate\t13%\n\t\t\tTerminal Revenue Growth\t4%\n\t\t\tDiscount Rate (2)(6)\tTerminal Cash Flow Exit Multiple (x) or Terminal Revenue Growth Rate (%) (6)\nKudu's Participation Contracts (1)(2)\tDiscounted cash flow\t325.5\t18% - 23%\t6x - 12x\nPassportCard/DavidShield (3)\tDiscounted cash flow\t95.0\t23%\t4%\nElementum Holdings L.P.\tDiscounted cash flow\t55.1\t19%\t4%\nPrivate debt instruments\tDiscounted cash flow\t17.9\t5% - 10%\tN/A\nAll other\tDiscounted cash flow\t18.1\t20% - 24%\t4%\nNoblr Inc.\tShare price of recent transaction\t8.7\tShare price:\t2.17\nZillion Insurance Services Inc.(4)\tRecent transaction\t5.0\tTransaction price:\t5.0\n", "q10k_tbl_30": " in Millions\tDecember 31 2019\t\t\t\nDescription\tValuation Technique(s)\tFair Value (1)\tUnobservable Inputs\t\n\t\t\tDiscount Rate (2)\tTerminal Cash Flow Exit Multiple (x) or Terminal Revenue Growth Rate (%) (2)\nKudu's Participation Contracts\tDiscounted cash flow\t266.5\t15% - 22%\t6x - 12x\nMediaAlpha\tDiscounted cash flow\t180.0\t15%\t4%\nPassportCard/DavidShield\tDiscounted cash flow\t90.0\t22%\t4%\nElementum Holdings L.P.\tDiscounted cash flow\t55.1\t20%\t4%\nPrivate debt instruments\tDiscounted cash flow\t23.7\t4% - 9%\tN/A\nAll other\tDiscounted cash flow\t23.7\t25% - 32%\t4%\nNoblr Inc.\tShare price of recent transaction\t5.0\tShare price:\t2.17\nZillion Insurance Services Inc.\tRecent transaction\t2.5\tTransaction price:\t2.5\nCompare.com\tEstimated net realizable value\t2.5\tNet realizable value:\t2.5\n", "q10k_tbl_31": " in Millions\tWeighted Average Economic Life (in years)\tSeptember 30 2020\t\t\t\tDecember 31 2019\t\t\t\nAcquisition Date Fair Value\t\tAccumulated Amortization\tImpairments\tNet Carrying Value\tAcquisition Date Fair Value\tAccumulated Amortization\tImpairments\tNet Carrying Value\nGoodwill:\t\t\t\t\t\t\t\t\t\nNSM (1)\tN/A\t511.8\t0\t0\t511.8\t381.6\t0\t0\t381.6\nKudu\tN/A\t7.6\t0\t0\t7.6\t7.6\t0\t0\t7.6\nOther Operations\tN/A\t20.7\t0\t0\t20.7\t13.1\t0\t7.6\t5.5\nTotal goodwill\t\t540.1\t0\t0\t540.1\t402.3\t0\t7.6\t394.7\nOther intangible assets:\t\t\t\t\t\t\t\t\t\nNSM (1)\t\t\t\t\t\t\t\t\t\nCustomer relationships\t9\t118.4\t28.4\t3.5\t86.5\t121.7\t19.8\t1.4\t100.5\nTrade names\t19\t60.8\t7.1\t1.0\t52.7\t61.9\t5.3\t.4\t56.2\nInformation technology platform\t0\t3.1\t1.4\t1.7\t0\t3.9\t1.4\t.6\t1.9\nRenewal rights\t12\t82.5\t3.9\t0\t78.6\t82.5\t.7\t0\t81.8\nOther\t3\t1.7\t1.0\t0\t.7\t1.7\t.7\t0\t1.0\nSubtotal\t\t266.5\t41.8\t6.2\t218.5\t271.7\t27.9\t2.4\t241.4\nKudu\t\t\t\t\t\t\t\t\t\nTrade names\t7\t2.2\t.5\t0\t1.7\t2.2\t.2\t0\t2.0\nOther Operations\t\t\t\t\t\t\t\t\t\nTrade names\t10\t1.0\t.1\t0\t.9\t1.7\t.5\t.2\t1.0\nCustomer relationships\t11\t7.2\t.8\t0\t6.4\t7.2\t.4\t0\t6.8\nInformation technology platform\t5\t0\t0\t0\t0\t.5\t.3\t.2\t0\nInsurance Licenses\tN/A\t8.6\t0\t0\t8.6\t8.6\t0\t0\t8.6\nOther\t5\t.2\t.1\t0\t.1\t.2\t0\t0\t.2\nSubtotal\t\t17.0\t1.0\t0\t16.0\t18.2\t1.2\t.4\t16.6\nTotal other intangible assets\t\t285.7\t43.3\t6.2\t236.2\t292.1\t29.3\t2.8\t260.0\nTotal goodwill and other intangible assets\t\t825.8\t43.3\t6.2\t776.3\t694.4\t29.3\t10.4\t654.7\nGoodwill and other intangible assets attributed to non-controlling interests\t\t\t\t\t(27.1)\t\t\t\t(23.4)\nGoodwill and other intangible assets included in White Mountains's common shareholders' equity\t\t\t\t\t749.2\t\t\t\t631.3\n", "q10k_tbl_32": " in Millions\t\t\nAcquisition of subsidiary/ asset\tGoodwill and Other intangible asset (1)\tAcquisition Date\nEmbrace (2)\t67.6\tApril 1 2019\nRenewal Rights (3)\t82.5\tJune 28 2019\nKingsbridge (4)\t125.1\tApril 7 2020\nTotal NSM segment\t275.2\t\nKudu Transaction\t9.8\tApril 4 2019\nOther Operations (4)\t37.5\tVarious\n", "q10k_tbl_33": "\tThree Months Ended September 30\t\t\t\t\t\n\t2020\t\t\t2019\t\t\nMillions\tGoodwill\tOther Intangible Assets\tTotal Goodwill and Other Intangible Assets\tGoodwill\tOther Intangible Assets\tTotal Goodwill and Other Intangible Assets\nBeginning balance\t518.2\t241.7\t759.9\t428.6\t239.0\t667.6\nAttribution of acquisition date fair value estimates between goodwill and other intangible assets\t0\t0\t0\t(2.2)\t2.2\t0\nAcquisitions of businesses\t14.9\t(1) -\t14.9\t0\t0\t0\nAcquisition of renewal rights\t0\t0\t0\t0\t0\t0\nForeign currency translation\t7.0\t(.1)\t6.9\t(1.6)\t(.5)\t(2.1)\nAmortization\t0\t(5.4)\t(5.4)\t0\t(4.6)\t(4.6)\nEnding balance\t540.1\t236.2\t776.3\t424.8\t236.1\t660.9\n", "q10k_tbl_34": "\tNine Months Ended September 30\t\t\t\t\t\n\t2020\t\t\t2019\t\t\nMillions\tGoodwill\tOther Intangible Assets\tTotal Goodwill and Other Intangible Assets\tGoodwill\tOther Intangible Assets\tTotal Goodwill and Other Intangible Assets\nBeginning balance\t394.7\t260.0\t654.7\t379.9\t157.6\t537.5\nDeconsolidation of MediaAlpha\t0\t0\t0\t(18.3)\t(23.5)\t(41.8)\nAttribution of acquisition date fair value estimates between goodwill and other intangible assets\t0\t0\t0\t(29.0)\t29.0\t0\nAcquisitions of businesses\t140.0\t(1) -\t140.0\t93.8\t(2) -\t93.8\nAcquisition of renewal rights\t0\t0\t0\t0\t82.5\t82.5\nForeign currency translation\t5.2\t(.5)\t4.7\t(1.6)\t0\t(1.6)\nAdjustments to reflect acquisition date fair value\t.2\t0\t.2\t0\t5.9\t5.9\nImpairments\t0\t(6.2)\t(6.2)\t0\t0\t0\nAmortization\t0\t(17.1)\t(17.1)\t0\t(15.4)\t(15.4)\nEnding balance\t540.1\t236.2\t776.3\t424.8\t236.1\t660.9\n", "q10k_tbl_35": "Millions\tSeptember 30 2020\tEffective Rate (1)\tDecember 31 2019\tEffective Rate (1)\nNSM Bank Facility\t275.0\t7.4%\t221.3\t7.5%\nUnamortized issuance cost\t(6.2)\t\t(3.9)\t\nNSM Bank Facility carrying value\t268.8\t\t217.4\t\nOther NSM debt carrying value\t1.4\t2.8%\t1.8\t3.0%\nKudu Bank Facility\t74.0\t8.4%\t57.0\t8.3%\nUnamortized issuance cost\t(3.0)\t\t(3.4)\t\nKudu Bank Facility carrying value\t71.0\t\t53.6\t\nOther Operations debt\t18.8\t10.1%\t11.1\t8.3%\nUnamortized issuance cost\t(.6)\t\t(.4)\t\nOther Operations carrying value\t18.2\t\t10.7\t\nTotal debt\t359.4\t\t283.5\t\n", "q10k_tbl_36": "NSM Bank Facility\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nBeginning balance\t273.4\t222.3\t221.3\t180.4\nTerm loans\t\t\t\t\nBorrowings (1)\t0\t0\t52.4\t42.9\nRepayments\t(.7)\t(.4)\t(1.3)\t(1.4)\nForeign currency translation\t2.3\t0\t2.6\t0\nRevolving credit loan\t\t\t\t\nBorrowings\t0\t0\t0\t6.5\nRepayments\t0\t0\t0\t(6.5)\nEnding balance\t275.0\t221.9\t275.0\t221.9\n", "q10k_tbl_37": "\tSeptember 30 2020\tDecember 31 2019\nContracts outstanding\t10495\t8987\nRemaining weighted average contract period outstanding (in years)\t10.7\t10.7\nContractual debt service outstanding (in millions):\t\t\nPrincipal\t70954.1\t62250.5\nInterest\t34842.8\t31799.7\nTotal debt service outstanding\t105796.9\t94050.2\nGross unearned insurance premiums (in millions)\t226.9\t198.4\n", "q10k_tbl_38": "Millions\tSeptember 30 2020\nOctober 1 2020 - December 31 2020\t5.3\nJanuary 1 2021 - March 31 2021\t5.3\nApril 1 2021 - June 30 2021\t5.2\nJuly 1 2021 - September 30 2021\t5.1\nOctober 1 2021 - December 31 2021\t5.1\nTotal 2021\t20.7\n2022\t19.6\n2023\t18.4\n2024\t17.2\n2025\t15.9\n2026 and thereafter\t129.8\nTotal gross unearned insurance premiums\t226.9\n", "q10k_tbl_39": "\tThree Months Ended September 30\t\tNine Months Ended September 30\t\nMillions\t2020\t2019\t2020\t2019\nWritten premiums:\t\t\t\t\nDirect\t14.4\t10.2\t45.5\t30.6\nAssumed\t0\t10.6\t.1\t10.6\nGross written premiums\t14.4\t20.8\t45.6\t41.2\nEarned premiums:\t\t\t\t\nDirect\t5.3\t4.4\t14.5\t11.9\nAssumed\t.9\t.8\t2.7\t1.8\nGross earned premiums\t6.2\t5.2\t17.2\t13.7\n", "q10k_tbl_40": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\n\t2020\t2019\t2020\t2019\nBasic and diluted earnings per share numerators (in millions):\t\t\t\t\nNet income attributable to White Mountains's common shareholders\t232.9\t48.7\t219.5\t353.6\nLess: total (loss) income from discontinued operations net of tax\t(.7)\t.9\t(.8)\t1.6\nNet income from continuing operations attributable to White Mountains's common shareholders\t233.6\t47.8\t220.3\t352.0\nAllocation of earnings to participating restricted common shares(1)\t(3.2)\t(.7)\t(2.9)\t(4.4)\nBasic and diluted earnings per share numerators\t230.4\t47.1\t217.4\t347.6\nBasic earnings per share denominators (in thousands):\t\t\t\t\nTotal average common shares outstanding during the period\t3101.8\t3185.4\t3129.0\t3180.4\nAverage unvested restricted common shares(2)\t(43.1)\t(43.4)\t(40.0)\t(39.6)\nBasic earnings per share denominator\t3058.7\t3142.0\t3089.0\t3140.8\nDiluted earnings per share denominator (in thousands):\t\t\t\t\nTotal average common shares outstanding during the period\t3101.8\t3185.4\t3129.0\t3180.4\nAverage unvested restricted common shares(2)\t(43.1)\t(43.4)\t(40.0)\t(39.6)\nDiluted earnings per share denominator\t3058.7\t3142.0\t3089.0\t3140.8\nBasic and diluted earnings per share (in dollars) - continuing operations:\t\t\t\t\nDistributed earnings - dividends declared and paid\t0\t0\t1.00\t1.00\nUndistributed earnings\t75.32\t15.01\t69.40\t109.67\nBasic and diluted earnings per share\t75.32\t15.01\t70.40\t110.67\n", "q10k_tbl_41": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nUndistributed net earnings - continuing operations:\t\t\t\t\nNet income attributable to White Mountains's common shareholders net of restricted common share amounts\t230.4\t47.1\t217.4\t347.6\nDividends declared net of restricted common share amounts (1)\t0\t0\t(3.1)\t(3.2)\nTotal undistributed net earnings net of restricted common share amounts\t230.4\t47.1\t214.3\t344.4\n", "q10k_tbl_42": "\tThree Months Ended September 30\t\t\t\tNine Months Ended September 30\t\t\t\n\t2020\t\t2019\t\t2020\t\t2019\t\nMillions except share amounts\tTarget Performance Shares Outstanding\tAccrued Expense\tTarget Performance Shares Outstanding\tAccrued Expense\tTarget Performance Shares Outstanding\tAccrued Expense\tTarget Performance Shares Outstanding\tAccrued Expense\nBeginning of period\t42458\t15.8\t42473\t30.8\t42473\t43.7\t40616\t31.7\nShares paid (1)\t0\t0\t0\t0\t(14070)\t(27.7)\t(13715)\t(18.1)\nNew grants\t0\t0\t0\t0\t14055\t0\t15600\t0\nForfeitures and cancellations(2)\t0\t(.3)\t0\t0\t0\t.1\t(28)\t0\nExpense recognized\t0\t13.6\t0\t5.6\t0\t13.0\t0\t22.8\nEnd of period\t42458\t29.1\t42473\t36.4\t42458\t29.1\t42473\t36.4\n", "q10k_tbl_43": "\tNine Months Ended September 30 2020\t\nMillions except share amounts\tTarget Performance Shares Outstanding\tAccrued Expense\nPerformance cycle:\t\t\n2018 - 2020\t13450\t15.4\n2019 - 2021\t15600\t10.6\n2020 - 2022\t14055\t3.6\nSub-total\t43105\t29.6\nAssumed forfeitures\t(647)\t(.5)\nSeptember 30 2020\t42458\t29.1\n", "q10k_tbl_44": "\tThree Months Ended September 30\t\t\t\tNine Months Ended September 30\t\t\t\n\t2020\t\t2019\t\t2020\t\t2019\t\nMillions except share amounts\tRestricted Shares\tUnamortized Issue Date Fair Value\tRestricted Shares\tUnamortized Issue Date Fair Value\tRestricted Shares\tUnamortized Issue Date Fair Value\tRestricted Shares\tUnamortized Issue Date Fair Value\nNon-vested\t\t\t\t\t\t\t\t\nBeginning of period\t43105\t23.0\t43395\t21.9\t43395\t16.7\t41510\t12.5\nIssued\t0\t0\t0\t0\t14055\t15.1\t15600\t14.5\nVested\t0\t0\t0\t0\t(14345)\t0\t(13715)\t0\nForfeited\t0\t0\t0\t0\t0\t0\t0\t0\nExpense recognized\t0\t(3.6)\t0\t(2.6)\t0\t(12.4)\t0\t(7.7)\nEnd of period\t43105\t19.4\t43395\t19.3\t43105\t19.4\t43395\t19.3\n", "q10k_tbl_45": "Millions\tThree Months Ended September 30\t\tNine Months Ended September 30\t\nLease Cost\t2020\t2019\t2020\t2019\nLease cost\t1.6\t1.9\t5.7\t5.4\nLess: sublease income\t.1\t.1\t.3\t.3\nNet lease cost\t1.5\t1.8\t5.4\t5.1\n", "q10k_tbl_46": "Millions\tAs of September 30 2020\nRemainder of 2020\t1.8\n2021\t7.6\n2022\t7.1\n2023\t6.9\n2024\t5.7\nThereafter\t17.2\nTotal undiscounted lease payments\t46.3\nLess: present value adjustment\t7.2\nOperating lease liability\t39.1\n", "q10k_tbl_47": "\tAs of September 30 2020\t\t\t\t\t\nMillions\tHG/BAM\tNSM\tKudu\tOther Operations\tTotal\tWeighted Average Incremental Borrowing Rate (1)\nROU lease asset\t9.9\t17.0\t2.1\t9.3\t38.3\t4.6%\nLease liability\t9.9\t17.0\t2.1\t10.1\t39.1\n", "q10k_tbl_48": "\tAs of December 31 2019\t\t\t\t\t\nMillions\tHG/BAM\tNSM\tKudu\tOther Operations\tTotal\tWeighted Average Incremental Borrowing Rate (1)\nROU lease asset\t10.4\t4.8\t2.3\t5.1\t22.6\t4.6%\nLease liability\t10.4\t4.8\t2.3\t5.3\t22.8\n", "q10k_tbl_49": "\tSeptember 30 2020\t\tDecember 31 2019\t\n in Millions\tNon-controlling Percentage\tNon-controlling Equity\tNon-controlling Percentage\tNon-controlling Equity\nNon-controlling interests excluding BAM\t\t\t\t\nHG Global\t3.1%\t14.1\t3.1%\t14.4\nNSM\t3.4%\t16.9\t3.6%\t14.9\nKudu\t.8%\t2.2\t.9%\t2.2\nOther\tvarious\t(1.3)\tvarious\t(1.6)\nTotal excluding BAM\t\t31.9\t\t29.9\nBAM\t100.0%\t(130.4)\t100.0%\t(146.7)\nTotal non-controlling interests\t\t(98.5)\t\t(116.8)\n", "q10k_tbl_50": "Millions\tHG Global/ BAM\tNSM\tKudu\tOther Operations\tTotal\nThree Months Ended September 30 2020\t\t\t\t\t\nEarned insurance premiums\t6.2\t0\t0\t0\t6.2\nNet investment income\t4.7\t0\t6.4\t60.1\t71.2\nNet realized and unrealized investment gains\t3.2\t0\t9.8\t293.6\t306.6\nAdvertising and commission revenues\t0\t58.2\t0\t2.1\t60.3\nOther revenue\t.4\t12.5\t.1\t2.2\t15.2\nTotal revenues\t14.5\t70.7\t16.3\t358.0\t459.5\nInsurance acquisition expenses\t1.6\t0\t0\t0\t1.6\nOther underwriting expenses\t.1\t0\t0\t0\t.1\nCost of sales\t0\t0\t0\t2.3\t2.3\nGeneral and administrative expenses\t13.9\t42.9\t2.2\t44.3\t103.3\nBroker commission expense\t0\t17.1\t0\t0\t17.1\nChange in fair value of contingent consideration earnout liabilities\t0\t.7\t0\t0\t.7\nAmortization of other intangible assets\t0\t5.1\t.1\t.2\t5.4\nInterest expense\t0\t6.1\t1.4\t.3\t7.8\nTotal expenses\t15.6\t71.9\t3.7\t47.1\t138.3\nPre-tax (loss) income\t(1.1)\t(1.2)\t12.6\t310.9\t321.2\n", "q10k_tbl_51": "Millions\tHG Global/ BAM\tNSM\tKudu\tOther Operations\tTotal\nNine Months Ended September 30 2020\t\t\t\t\t\nEarned insurance premiums\t17.2\t0\t0\t0\t17.2\nNet investment income\t15.1\t0\t19.3\t79.3\t113.7\nNet realized and unrealized investment gains\t23.7\t0\t1.5\t277.6\t302.8\nAdvertising and commission revenues\t0\t174.2\t0\t6.1\t180.3\nOther revenue\t2.1\t37.6\t.2\t6.0\t45.9\nTotal revenues\t58.1\t211.8\t21.0\t369.0\t659.9\nInsurance acquisition expenses\t5.4\t0\t0\t0\t5.4\nOther underwriting expenses\t.3\t0\t0\t0\t.3\nCost of sales\t0\t0\t0\t6.5\t6.5\nGeneral and administrative expenses\t41.1\t131.0\t7.5\t87.1\t266.7\nBroker commission expense\t0\t56.4\t0\t0\t56.4\nChange in fair value of contingent consideration earnout liabilities\t0\t(1.6)\t0\t0\t(1.6)\nAmortization of other intangible assets\t0\t16.2\t.3\t.6\t17.1\nInterest expense\t0\t16.1\t4.3\t.8\t21.2\nTotal expenses\t46.8\t218.1\t12.1\t95.0\t372.0\nPre-tax income (loss)\t11.3\t(6.3)\t8.9\t274.0\t287.9\n", "q10k_tbl_52": "Millions\tHG Global/BAM\tNSM\tKudu\tOther Operations\tTotal\nThree Months Ended September 30 2019\t\t\t\t\t\nEarned insurance premiums\t5.2\t0\t0\t0\t5.2\nNet investment income\t5.4\t0\t4.6\t8.4\t18.4\nNet realized and unrealized investment gains\t7.1\t0\t2.7\t57.2\t67.0\nAdvertising and commission revenues\t0\t49.4\t0\t1.9\t51.3\nOther revenue\t.3\t10.5\t.2\t2.6\t13.6\nTotal revenues\t18.0\t59.9\t7.5\t70.1\t155.5\nInsurance acquisition expenses\t1.4\t0\t0\t0\t1.4\nOther underwriting expenses\t.1\t0\t0\t0\t.1\nCost of sales\t0\t0\t0\t2.3\t2.3\nGeneral and administrative expenses\t12.5\t33.3\t4.5\t27.7\t78.0\nBroker commission expense\t0\t15.3\t0\t0\t15.3\nChange in fair value of contingent consideration earnout liabilities\t0\t(2.0)\t0\t0\t(2.0)\nAmortization of other intangible assets\t0\t4.4\t.2\t0\t4.6\nInterest expense\t0\t4.4\t0\t.3\t4.7\nTotal expenses\t14.0\t55.4\t4.7\t30.3\t104.4\nPre-tax income\t4.0\t4.5\t2.8\t39.8\t51.1\n", "q10k_tbl_53": "Millions\tHG Global/ BAM\tNSM\tKudu (1)\tMediaAlpha (2)\tOther Operations\tTotal\nNine Months Ended September 30 2019\t\t\t\t\t\t\nEarned insurance premiums\t13.7\t0\t0\t0\t0\t13.7\nNet investment income\t16.1\t0\t8.6\t0\t30.7\t55.4\nNet realized and unrealized investment gains\t30.4\t0\t3.1\t0\t199.6\t233.1\nRealized gain and unrealized investment gain from the MediaAlpha Transaction\t0\t0\t0\t0\t182.2\t182.2\nAdvertising and commission revenues\t0\t147.6\t0\t48.8\t4.5\t200.9\nOther revenue\t1.3\t27.7\t.2\t0\t3.6\t32.8\nTotal revenues\t61.5\t175.3\t11.9\t48.8\t420.6\t718.1\nInsurance acquisition expenses\t4.1\t0\t0\t0\t0\t4.1\nOther underwriting expenses\t.3\t0\t0\t0\t0\t.3\nCost of sales\t0\t0\t0\t40.6\t5.0\t45.6\nGeneral and administrative expenses\t39.1\t91.4\t6.7\t12.5\t87.2\t236.9\nBroker commission expense\t0\t48.9\t0\t0\t0\t48.9\nChange in fair value of contingent consideration earnout liabilities\t0\t5.6\t0\t0\t0\t5.6\nAmortization of other intangible assets\t0\t13.5\t.2\t1.6\t.1\t15.4\nInterest expense\t0\t12.2\t0\t.2\t.3\t12.7\nTotal expenses\t43.5\t171.6\t6.9\t54.9\t92.6\t369.5\nPre-tax income (loss)\t18.0\t3.7\t5.0\t(6.1)\t328.0\t348.6\n", "q10k_tbl_54": "Millions\tHG Global/BAM\tNSM\tKudu\tOther Operations\tTotal\nThree Months Ended September 30 2020\t\t\t\t\t\nCommission and other revenue\t\t\t\t\t\nSpecialty Transportation\t0\t21.9\t0\t0\t21.9\nReal Estate\t0\t6.0\t0\t0\t6.0\nSocial Services\t0\t8.6\t0\t0\t8.6\nPet\t0\t14.7\t0\t0\t14.7\nUnited Kingdom\t0\t13.9\t0\t0\t13.9\nOther\t0\t5.6\t0\t2.1\t7.7\nTotal commission and other revenue\t0\t70.7\t0\t2.1\t72.8\nProduct revenues\t0\t0\t0\t2.0\t2.0\nRevenues from contracts with customers\t0\t70.7\t0\t4.1\t74.8\nOther revenues (1)\t14.5\t0\t16.3\t353.9\t384.7\nTotal revenues\t14.5\t70.7\t16.3\t358.0\t459.5\n", "q10k_tbl_55": "Millions\tHG Global/BAM\tNSM\tKudu\tOther Operations\tTotal\nNine Months Ended September 30 2020\t\t\t\t\t\nCommission and other revenue\t\t\t\t\t\nSpecialty Transportation\t0\t66.1\t0\t0\t66.1\nReal Estate\t0\t32.7\t0\t0\t32.7\nSocial Services\t0\t22.2\t0\t0\t22.2\nPet\t0\t39.8\t0\t0\t39.8\nUnited Kingdom (2)\t0\t36.3\t0\t0\t36.3\nOther\t0\t14.7\t0\t6.1\t20.8\nTotal commission and other revenue\t0\t211.8\t0\t6.1\t217.9\nProduct revenues\t0\t0\t0\t6.4\t6.4\nRevenues from contracts with customers\t0\t211.8\t0\t12.5\t224.3\nOther revenues (1)\t58.1\t0\t21.0\t356.5\t435.6\nTotal revenues\t58.1\t211.8\t21.0\t369.0\t659.9\n", "q10k_tbl_56": "Millions\tHG Global/BAM\tNSM\tKudu\tOther Operations\tTotal\nThree Months Ended September 30 2019\t\t\t\t\t\nCommission and other revenue\t\t\t\t\t\nSpecialty Transportation\t0\t20.6\t0\t0\t20.6\nReal Estate\t0\t4.9\t0\t0\t4.9\nSocial Services\t0\t7.4\t0\t0\t7.4\nPet\t0\t10.4\t0\t0\t10.4\nUnited Kingdom\t0\t11.2\t0\t0\t11.2\nOther\t0\t5.4\t0\t1.9\t7.3\nTotal commission and other revenue\t0\t59.9\t0\t1.9\t61.8\nProducts\t0\t0\t0\t2.5\t2.5\nTotal revenues from contracts with customers\t0\t59.9\t0\t4.4\t64.3\nOther revenues (1)\t18.0\t0\t7.5\t65.7\t91.2\nTotal revenues\t18.0\t59.9\t7.5\t70.1\t155.5\n", "q10k_tbl_57": "Millions\tHG Global/BAM\tNSM\tKudu\tMediaAlpha\tOther Operations\tTotal\nNine Months Ended September 30 2019\t\t\t\t\t\t\nCommission and other revenue\t\t\t\t\t\t\nSpecialty Transportation\t0\t60.3\t0\t0\t0\t60.3\nReal Estate\t0\t25.4\t0\t0\t0\t25.4\nSocial Services\t0\t19.7\t0\t0\t0\t19.7\nPet\t0\t19.9\t0\t0\t0\t19.9\nUnited Kingdom\t0\t35.5\t0\t0\t0\t35.5\nOther\t0\t14.5\t0\t0\t4.5\t19.0\nTotal commission and other revenue\t0\t175.3\t0\t0\t4.5\t179.8\nAdvertising revenues\t0\t0\t0\t48.8\t0\t48.8\nRevenues from contracts with customers\t0\t175.3\t0\t48.8\t4.5\t228.6\nProducts\t0\t0\t0\t0\t3.1\t3.1\nTotal revenues from contracts with customers\t0\t175.3\t0\t48.8\t7.6\t231.7\nOther revenues (1)\t61.5\t0\t11.9\t0\t413.0\t486.4\nTotal revenues\t61.5\t175.3\t11.9\t48.8\t420.6\t718.1\n", "q10k_tbl_58": "Millions\tSeptember 30 2020\tDecember 31 2019\nEquity method eligible investments at fair value\t1087.0\t761.7\nOther at fair value (1)\t84.2\t94.6\nTotal other long-term investments\t1171.2\t856.3\n", "q10k_tbl_59": "\tBasic Ownership Interest\t\t\nInvestee\tSeptember 30 2020\tDecember 31 2019\tInstrument Held\nPassportCard/DavidShield (1)\t53.8%\t50.0%\tCommon shares\nMediaAlpha\t48.3%\t48.3%\tUnits\ndurchblicker\t45.0%\t45.0%\tCommon shares\nElementum\t30.0%\t30.0%\tLimited partnership interest\nTuckerman Capital Funds\t14.5 - 62.2%\t17.5 - 62.4%\tLimited and general partnership interests\nEnlightenment Capital Funds\t9.6 - 66.7%\t10.0 - 38.4%\tLimited and general partnership interests\nJAM Partners L.P.\t0\t11.1%\tLimited partnership interest\nKudu Participation Contracts\t3.2 - 35.0%\t3.2 - 30.0%\tRevenue and earnings participation contracts\n", "q10k_tbl_60": "Millions\tSeptember 30 2020\tDecember 31 2019\nBalance sheet data:\t\t\nTotal assets\t135.7\t105.4\nTotal liabilities\t460.8\t144.9\n", "q10k_tbl_61": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nIncome statement data:\t\t\t\t\nTotal revenues\t151.5\t110.4\t394.6\t281.9\nTotal expenses\t(144.1)\t(102.6)\t(368.2)\t(274.5)\nNet income\t7.4\t7.8\t26.4\t7.4\n", "q10k_tbl_62": "\tSeptember 30 2020\t\tDecember 31 2019\t\nMillions\tFair Value\tCarrying Value\tFair Value\tCarrying Value\nNSM Bank Facility\t276.1\t268.8\t221.2\t217.4\nOther NSM debt\t1.6\t1.4\t1.7\t1.8\nKudu Bank Facility\t74.4\t71.0\t53.6\t(1) $53.6\nOther Operations debt\t18.5\t18.2\t11.3\t10.7\n", "q10k_tbl_63": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\n\t2020\t2019\t2020\t2019\nBasic and diluted earnings per share numerators (in millions):\t\t\t\t\nNet income attributable to White Mountains's common shareholders\t232.9\t48.7\t219.5\t353.6\nLess: total income from continuing operations net of tax\t233.6\t47.8\t220.3\t352.0\nNet (loss) income from discontinued operations attributable to White Mountains's common shareholders\t(.7)\t.9\t(.8)\t1.6\nAllocation of earnings to participating restricted common shares (1)\t0\t0\t0\t0\nBasic and diluted (losses) earnings per share numerators (2)\t(.7)\t.9\t(.8)\t1.6\nBasic earnings per share denominators (in thousands):\t\t\t\t\nTotal average common shares outstanding during the period\t3101.8\t3185.4\t3129.0\t3180.4\nAverage unvested restricted common shares (3)\t(43.1)\t(43.4)\t(40.0)\t(39.6)\nBasic earnings per share denominator\t3058.7\t3142.0\t3089.0\t3140.8\nDiluted earnings per share denominator (in thousands):\t\t\t\t\nTotal average common shares outstanding during the period\t3101.8\t3185.4\t3129.0\t3180.4\nAverage unvested restricted common shares (3)\t(43.1)\t(43.4)\t(40.0)\t(39.6)\nDiluted earnings per share denominator\t3058.7\t3142.0\t3089.0\t3140.8\nBasic and diluted (losses) earnings per share (in dollars) - discontinued operations:\t(.23)\t.28\t(.26)\t.50\n", "q10k_tbl_64": "\tSeptember 30 2020\tJune 30 2020\tDecember 31 2019\tSeptember 30 2019\nBook value per share numerators (in millions):\t\t\t\t\nWhite Mountains's common shareholders' equity - GAAP book value per share numerator\t3407.7\t3166.0\t3261.5\t3193.4\nTime value of money discount on expected future payments on the BAM Surplus Notes (1)\t(144.3)\t(146.7)\t(151.6)\t(132.8)\nHG Global's unearned premium reserve (1)\t181.0\t173.8\t156.7\t160.4\nHG Global's net deferred acquisition costs (1)\t(49.5)\t(47.0)\t(41.5)\t(42.0)\nAdjusted book value per share numerator\t3394.9\t3146.1\t3225.1\t3179.0\nBook value per share denominators (in thousands of shares):\t\t\t\t\nCommon shares outstanding - GAAP book value per share denominator\t3102.0\t3101.8\t3185.4\t3185.4\nUnearned restricted common shares\t(19.3)\t(23.1)\t(18.5)\t(21.5)\nAdjusted book value per share denominator\t3082.7\t3078.7\t3166.9\t3163.9\nGAAP book value per share\t1098.56\t1020.71\t1023.91\t1002.53\nAdjusted book value per share\t1101.28\t1021.91\t1018.41\t1004.76\nYear-to-date dividends paid per share\t1.00\t1.00\t1.00\t1.00\n", "q10k_tbl_65": "Millions\tSeptember 30 2020\tJune 30 2020\tDecember 31 2019\tSeptember 30 2019\t\nGoodwill:\t\t\t\t\t\nNSM\t511.8\t(2) $504.9\t(2) $381.6\t397.0\t(4)\nKudu\t7.6\t7.6\t7.6\t7.6\t\nOther Operations\t20.7\t(3) 5.7\t5.5\t20.2\t(4)\nTotal goodwill\t540.1\t518.2\t394.7\t424.8\t\nOther intangible assets:\t\t\t\t\t\nNSM\t218.5\t223.7\t241.4\t233.6\t(4)\nKudu\t1.7\t1.8\t2.0\t2.0\t\nOther Operations\t16.0\t16.2\t16.6\t.5\t(4)\nTotal other intangible assets\t236.2\t241.7\t260.0\t236.1\t\nTotal goodwill and other intangible assets (1)\t776.3\t759.9\t654.7\t660.9\t\nGoodwill and other intangible assets attributed to non-controlling interests\t(27.1)\t(25.9)\t(23.4)\t(25.0)\t\nGoodwill and other intangible assets included in White Mountains's common shareholders' equity\t749.2\t734.0\t631.3\t635.9\t\n", "q10k_tbl_66": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nRevenues\t\t\t\t\nFinancial Guarantee revenues\t14.5\t18.0\t58.1\t61.5\nSpecialty Insurance Distribution revenues\t70.7\t59.9\t211.8\t175.3\nAsset Management revenues (1)\t16.3\t7.5\t21.0\t11.9\nMarketing Technology revenues (2)\t0\t0\t0\t48.8\nOther Operations revenues\t358.0\t70.1\t369.0\t420.6\nTotal revenues\t459.5\t155.5\t659.9\t718.1\nExpenses\t\t\t\t\nFinancial Guarantee expenses\t15.6\t14.0\t46.8\t43.5\nSpecialty Insurance Distribution expenses\t71.9\t55.4\t218.1\t171.6\nAsset Management expenses (1)\t3.7\t4.7\t12.1\t6.9\nMarketing Technology expenses (2)\t0\t0\t0\t54.9\nOther Operations expenses\t47.1\t30.3\t95.0\t92.6\nTotal expenses\t138.3\t104.4\t372.0\t369.5\nPre-tax income (loss)\t\t\t\t\nFinancial Guarantee pre-tax (loss) income\t(1.1)\t4.0\t11.3\t18.0\nSpecialty Insurance Distribution pre-tax (loss) income\t(1.2)\t4.5\t(6.3)\t3.7\nAsset Management pre-tax income (1)\t12.6\t2.8\t8.9\t5.0\nMarketing Technology pre-tax loss (2)\t0\t0\t0\t(6.1)\nOther Operations pre-tax income\t310.9\t39.8\t274.0\t328.0\nTotal pre-tax income\t321.2\t51.1\t287.9\t348.6\nIncome tax expense\t(98.5)\t(8.8)\t(97.1)\t(18.9)\nNet income from continuing operations\t222.7\t42.3\t190.8\t329.7\nNet (loss) income from sale of discontinued operations net of tax\t(.7)\t.9\t(.8)\t1.6\nNet income\t222.0\t43.2\t190.0\t331.3\nNet loss attributable to non-controlling interests\t10.9\t5.5\t29.5\t22.3\nNet income attributable to White Mountains's common shareholders\t232.9\t48.7\t219.5\t353.6\nOther comprehensive income (loss) net of tax\t3.9\t(2.4)\t1.0\t(5.8)\nComprehensive income\t236.8\t46.3\t220.5\t347.8\nComprehensive (income) loss attributable to non-controlling interests\t(.1)\t.1\t(.3)\t.3\nComprehensive income attributable to White Mountains's common shareholders\t236.7\t46.4\t220.2\t348.1\n", "q10k_tbl_67": "\tThree Months Ended September 30 2020\t\t\t\nMillions\tHG Global\tBAM\tEliminations\tTotal\nDirect written premiums\t0\t14.5\t0\t14.5\nAssumed written premiums\t12.5\t0\t(12.5)\t0\nGross written premiums\t12.5\t14.5\t(12.5)\t14.5\nCeded written premiums\t0\t(12.5)\t12.5\t0\nNet written premiums\t12.5\t2.0\t0\t14.5\nEarned insurance premiums\t5.1\t1.1\t0\t6.2\nNet investment income\t1.8\t2.9\t0\t4.7\nNet investment income - BAM Surplus Notes\t4.6\t0\t(4.6)\t0\nNet realized and unrealized investment gains\t0\t3.2\t0\t3.2\nOther revenue\t.2\t.2\t0\t.4\nTotal revenues\t11.7\t7.4\t(4.6)\t14.5\nInsurance acquisition expenses\t1.1\t.5\t0\t1.6\nOther underwriting expenses\t0\t.1\t0\t.1\nGeneral and administrative expenses\t.6\t13.3\t0\t13.9\nInterest expense - BAM Surplus Notes\t0\t4.6\t(4.6)\t0\nTotal expenses\t1.7\t18.5\t(4.6)\t15.6\nPre-tax income (loss)\t10.0\t(11.1)\t0\t(1.1)\nSupplemental information:\t\t\t\t\nMSC collected (1)\t0\t15.4\t0\t15.4\n", "q10k_tbl_68": "\tThree Months Ended September 30 2019\t\t\t\nMillions\tHG Global\tBAM\tEliminations\tTotal\nDirect written premiums\t0\t10.2\t0\t10.2\nAssumed (ceded) written premiums\t17.8\t10.6\t(17.8)\t10.6\nGross written premiums\t17.8\t20.8\t(17.8)\t20.8\nCeded written premiums\t0\t(17.8)\t17.8\t0\nNet written premiums\t17.8\t3.0\t0\t20.8\nEarned insurance premiums\t4.2\t1.0\t0\t5.2\nNet investment income\t1.8\t3.6\t0\t5.4\nNet investment income - BAM Surplus Notes\t6.9\t0\t(6.9)\t0\nNet realized and unrealized investment gains\t2.0\t5.1\t0\t7.1\nOther revenue\t0\t.3\t0\t.3\nTotal revenues\t14.9\t10.0\t(6.9)\t18.0\nInsurance acquisition expenses\t1.1\t.3\t0\t1.4\nOther underwriting expenses\t0\t.1\t0\t.1\nGeneral and administrative expenses\t.3\t12.2\t0\t12.5\nInterest expense - BAM Surplus Notes\t0\t6.9\t(6.9)\t0\nTotal expenses\t1.4\t19.5\t(6.9)\t14.0\nPre-tax income (loss)\t13.5\t(9.5)\t0\t4.0\nSupplemental information:\t\t\t\t\nMSC collected (1)\t0\t23.0\t0\t23.0\n", "q10k_tbl_69": "\tNine Months Ended September 30 2020\t\t\t\nMillions\tHG Global\tBAM\tEliminations\tTotal\nDirect written premiums\t0\t45.5\t0\t45.5\nAssumed written premiums\t39.1\t.1\t(39.1)\t0.1\nGross written premiums\t39.1\t45.6\t(39.1)\t45.6\nCeded written premiums\t0\t(39.1)\t39.1\t0\nNet written premiums\t39.1\t6.5\t0\t45.6\nEarned insurance premiums\t14.1\t3.1\t0\t17.2\nNet investment income\t6.1\t9.0\t0\t15.1\nNet investment income - BAM Surplus Notes\t14.1\t0\t(14.1)\t0\nNet realized and unrealized investment gains\t12.1\t11.6\t0\t23.7\nOther revenue\t.3\t1.8\t0\t2.1\nTotal revenues\t46.7\t25.5\t(14.1)\t58.1\nInsurance acquisition expenses\t3.3\t2.1\t0\t5.4\nOther underwriting expenses\t0\t.3\t0\t.3\nGeneral and administrative expenses\t1.6\t39.5\t0\t41.1\nInterest expense - BAM Surplus Notes\t0\t14.1\t(14.1)\t0\nTotal expenses\t4.9\t56.0\t(14.1)\t46.8\nPre-tax income (loss)\t41.8\t(30.5)\t0\t11.3\nSupplemental information:\t\t\t\t\nMSC collected (1)\t0\t46.9\t0\t46.9\n", "q10k_tbl_70": "\tNine Months Ended September 30 2019\t\t\t\nMillions\tHG Global\tBAM\tEliminations\tTotal\nDirect written premiums\t0\t30.6\t0\t30.6\nAssumed written premiums\t35.2\t10.6\t(35.2)\t10.6\nGross written premiums\t35.2\t41.2\t(35.2)\t41.2\nCeded written premiums\t0\t(35.2)\t35.2\t0\nNet written premiums\t35.2\t6.0\t0\t41.2\nEarned insurance premiums\t11.0\t2.7\t0\t13.7\nNet investment income\t5.6\t10.5\t0\t16.1\nNet investment income - BAM Surplus Notes\t20.6\t0\t(20.6)\t0\nNet realized and unrealized investment gains\t11.1\t19.3\t0\t30.4\nOther revenue\t0\t1.3\t0\t1.3\nTotal revenues\t48.3\t33.8\t(20.6)\t61.5\nInsurance acquisition expenses\t2.8\t1.3\t0\t4.1\nOther underwriting expenses\t0\t.3\t0\t.3\nGeneral and administrative expenses\t1.2\t37.9\t0\t39.1\nInterest expense - BAM Surplus Notes\t0\t20.6\t(20.6)\t0\nTotal expenses\t4.0\t60.1\t(20.6)\t43.5\nPre-tax income (loss)\t44.3\t(26.3)\t0\t18.0\nSupplemental information:\t\t\t\t\nMSC collected (1)\t0\t42.9\t0\t42.9\n", "q10k_tbl_71": "\tThree Months Ended September 30\t\n in Millions\t2020\t2019\nGross par value of primary market policies issued\t4420.8\t2662.7\nGross par value of secondary market policies issued\t318.7\t288.6\nGross par value of assumed reinsurance\t0\t1130.7\nTotal gross par value of market policies issued\t4739.5\t4082.0\nGross written premiums\t14.4\t20.8\nMSC collected\t15.4\t23.0\nTotal gross written premiums and MSC collected\t29.8\t43.8\nPresent value of future installment MSC collections\t0\t.1\nGross written premium adjustments on existing installment policies\t.1\t0\nGross written premiums and MSC from new business\t29.9\t43.9\nTotal pricing\t63 bps\t107 bps\n", "q10k_tbl_72": "\tNine Months Ended September 30\t\n in Millions\t2020\t2019\nGross par value of primary market policies issued\t10125.0\t6672.7\nGross par value of secondary market policies issued\t1665.7\t1121.0\nGross par value of assumed reinsurance\t36.9\t1130.7\nTotal gross par value of market policies issued\t11827.6\t8924.4\nGross written premiums\t45.6\t41.2\nMSC collected\t46.9\t42.9\nTotal gross written premiums and MSC collected\t92.5\t84.1\nPresent value of future installment MSC collections\t.3\t.3\nGross written premium adjustments on existing installment policies\t.1\t(.1)\nGross written premiums and MSC from new business\t92.9\t84.3\nTotal pricing\t79 bps\t94 bps\n", "q10k_tbl_73": "Millions\tSeptember 30 2020\tDecember 31 2019\tSeptember 30 2019\nPolicyholders' surplus\t347.2\t402.4\t422.1\nContingency reserve\t81.6\t68.2\t64.3\nQualified statutory capital\t428.8\t470.6\t486.4\nNet unearned premiums\t43.6\t39.3\t40.5\nPresent value of future installment premiums and MSC\t14.4\t13.7\t13.7\nHG Re Ltd. collateral trusts at statutory value\t381.0\t314.0\t289.2\nFidus Re Ltd. collateral trust at statutory value\t100.0\t100.0\t100.0\nClaims paying resources\t967.8\t937.6\t929.8\n", "q10k_tbl_74": "\tSeptember 30 2020\t\t\t\nMillions\tHG Global\tBAM\tEliminations and Segment Adjustment\tTotal\nAssets\t\t\t\t\nFixed maturity investments\t380.2\t451.6\t0\t831.8\nShort-term investments\t17.1\t39.0\t0\t56.1\nTotal investments\t397.3\t490.6\t0\t887.9\nCash\t14.3\t35.6\t0\t49.9\nBAM Surplus Notes\t409.7\t0\t(409.7)\t0\nAccrued interest receivable on BAM Surplus Notes\t159.8\t0\t(159.8)\t0\nDeferred acquisition costs\t51.1\t26.1\t(51.1)\t26.1\nInsurance premiums receivable\t9.7\t7.2\t(9.7)\t7.2\nAccrued investment income\t2.0\t3.2\t0\t5.2\nOther assets\t0\t16.5\t(1.5)\t15.0\nTotal assets\t1043.9\t579.2\t(631.8)\t991.3\nLiabilities\t\t\t\t\nBAM Surplus Notes(1)\t0\t409.7\t(409.7)\t0\nAccrued interest payable on BAM Surplus Notes(2)\t0\t159.8\t(159.8)\t0\nPreferred dividends payable to White Mountains's subsidiaries(3)\t349.6\t0\t0\t349.6\nPreferred dividends payable to non-controlling interests\t12.9\t0\t0\t12.9\nUnearned insurance premiums\t186.8\t40.1\t0\t226.9\nAccrued incentive compensation\t.7\t18.7\t0\t19.4\nAccounts payable on unsettled investment purchases\t0\t6.4\t0\t6.4\nOther liabilities\t2.3\t74.9\t(62.3)\t14.9\nTotal liabilities\t552.3\t709.6\t(631.8)\t630.1\nEquity\t\t\t\t\nWhite Mountains's common shareholders' equity\t477.5\t0\t0\t477.5\nNon-controlling interests\t14.1\t(130.4)\t0\t(116.3)\nTotal equity\t491.6\t(130.4)\t0\t361.2\nTotal liabilities and equity\t1043.9\t579.2\t(631.8)\t991.3\n", "q10k_tbl_75": "\tDecember 31 2019\t\t\t\nMillions\tHG Global\tBAM\tEliminations and Segment Adjustment\tTotal Segment\nAssets\t\t\t\t\nFixed maturity investments\t304.2\t495.1\t0\t799.3\nShort-term investments\t15.7\t30.6\t0\t46.3\nTotal investments\t319.9\t525.7\t0\t845.6\nCash\t9.8\t14.4\t0\t24.2\nBAM Surplus Notes\t457.6\t0\t(457.6)\t0\nAccrued interest receivable on BAM Surplus Notes\t162.7\t0\t(162.7)\t0\nDeferred acquisition costs\t42.8\t22.1\t(42.8)\t22.1\nInsurance premiums receivable\t4.2\t6.7\t(4.2)\t6.7\nAccrued investment income\t1.7\t3.7\t0\t5.4\nOther assets\t0\t20.2\t(.2)\t20.0\nTotal assets\t998.7\t592.8\t(667.5)\t924.0\nLiabilities\t\t\t\t\nBAM Surplus Notes(1)\t0\t457.6\t(457.6)\t0\nAccrued interest payable on BAM Surplus Notes(2)\t0\t162.7\t(162.7)\t0\nPreferred dividends payable to White Mountains's subsidiaries(3)\t330.3\t0\t0\t330.3\nPreferred dividends payable to non-controlling interests\t11.4\t0\t0\t11.4\nUnearned insurance premiums\t161.7\t36.7\t0\t198.4\nAccrued incentive compensation\t.7\t21.0\t0\t21.7\nOther liabilities\t1.0\t61.5\t(47.2)\t15.3\nTotal liabilities\t505.1\t739.5\t(667.5)\t577.1\nEquity\t\t\t\t\nWhite Mountains's common shareholders' equity\t479.2\t0\t0\t479.2\nNon-controlling interests\t14.4\t(146.7)\t0\t(132.3)\nTotal equity\t493.6\t(146.7)\t0\t346.9\nTotal liabilities and equity\t998.7\t592.8\t(667.5)\t924.0\n", "q10k_tbl_76": "\tThree Months Ended September 30\t\tNine Months Ended September 30\t\nMillions\t2020\t2019\t2020\t2019\nCommission revenues\t58.2\t49.4\t174.2\t147.6\nBroker commission expenses\t17.1\t15.3\t56.4\t48.9\nGross profit\t41.1\t34.1\t117.8\t98.7\nOther revenues\t12.5\t10.5\t37.6\t27.7\nGeneral and administrative expenses\t42.9\t33.3\t131.0\t91.4\nChange in fair value of contingent consideration earnout liabilities\t.7\t(2.0)\t(1.6)\t5.6\nAmortization of other intangible assets\t5.1\t4.4\t16.2\t13.5\nInterest expense\t6.1\t4.4\t16.1\t12.2\nGAAP pre-tax (loss) income\t(1.2)\t4.5\t(6.3)\t3.7\nIncome tax expense (benefit)\t.1\t1.7\t(2.8)\t1.7\nGAAP net (loss) income\t(1.3)\t2.8\t(3.5)\t2.0\nAdd back:\t\t\t\t\nInterest expense\t6.1\t4.4\t16.1\t12.2\nIncome tax expense (benefit)\t.1\t1.7\t(2.8)\t1.7\nGeneral and administrative expenses - depreciation\t1.2\t.8\t2.9\t2.0\nAmortization of other intangible assets\t5.1\t4.4\t16.2\t13.5\nEBITDA (1)\t11.2\t14.1\t28.9\t31.4\nAdd back:\t\t\t\t\nChange in fair value of contingent consideration earnout liabilities\t.7\t(2.0)\t(1.6)\t5.6\nNon-cash equity-based compensation expense\t1.0\t0\t1.0\t0\nImpairments of intangible assets\t0\t0\t6.2\t0\nAcquisition-related transaction expenses\t.6\t.3\t5.6\t1.4\nInvestments made in the development of new business lines\t.2\t.1\t.6\t.3\nRestructuring expenses\t1.7\t.3\t3.2\t.4\nAdjusted EBITDA (1)\t15.4\t12.8\t43.9\t39.1\n", "q10k_tbl_77": "\tThree Months Ended September 30\t\t\t\n\t2020\t\t2019\t\n in Millions\tControlled Premium (1)\tCommission and Other Revenues\tControlled Premium (1)\tCommission and Other Revenues\nSpecialty Transportation\t81.6\t21.9\t78.4\t20.6\nReal Estate\t28.5\t6.0\t22.7\t4.9\nSocial Services\t34.6\t8.6\t29.7\t7.4\nPet\t35.3\t14.7\t23.1\t10.4\nUnited Kingdom\t53.6\t13.9\t36.7\t11.2\nOther\t32.2\t5.6\t38.6\t5.4\nTotal\t265.8\t70.7\t229.2\t59.9\n", "q10k_tbl_78": "\tNine Months Ended September 30\t\t\t\n\t2020\t\t2019\t\n in Millions\tControlled Premium (1)\tCommission and Other Revenues\tControlled Premium (1)\tCommission and Other Revenues\nSpecialty Transportation\t240.4\t66.1\t225.9\t60.3\nReal Estate\t142.6\t32.7\t115.5\t25.4\nSocial Services\t88.3\t22.2\t77.6\t19.7\nPet\t96.6\t39.8\t43.8\t19.9\nUnited Kingdom\t134.0\t36.3\t118.3\t35.5\nOther\t95.5\t14.7\t95.6\t14.5\nTotal\t797.4\t211.8\t676.7\t175.3\n", "q10k_tbl_79": "Millions\tThree Months Ended September 30 2020\tThree Months Ended September 30 2019\tNine Months Ended September 30 2020\nNet investment income\t6.4\t4.6\t19.3\nNet unrealized investment gains\t9.8\t2.7\t1.5\nOther revenues\t.1\t.2\t.2\nTotal revenues\t16.3\t7.5\t21.0\nGeneral and administrative expenses\t2.2\t4.5\t7.5\nAmortization of other intangible assets\t.1\t.2\t.3\nInterest expense\t1.4\t0\t4.3\nTotal expenses\t3.7\t4.7\t12.1\nGAAP pre-tax income\t12.6\t2.8\t8.9\nIncome tax expense\t3.8\t.8\t3.2\nGAAP net income\t8.8\t2.0\t5.7\nAdd back:\t\t\t\nInterest expense\t1.4\t0\t4.3\nIncome tax expense\t3.8\t.8\t3.2\nAmortization of other intangible assets\t.1\t.2\t.3\nEBITDA (1)\t14.1\t3.0\t13.5\nAdd back:\t\t\t\nNet unrealized investment gains\t(9.8)\t(2.7)\t(1.5)\nNon-cash equity-based compensation expense\t.1\t.5\t.1\nAcquisition-related transaction expenses\t.1\t2.1\t1.6\nAdjusted EBITDA (1)\t4.5\t2.9\t13.7\n", "q10k_tbl_80": "Millions\tJanuary 1 2019 to February 26 2019\nAdvertising and commission revenues\t48.8\nCost of sales\t40.6\nGross profit\t8.2\nGeneral and administrative expenses\t5.7\nGeneral and administrative expenses - MediaAlpha Transaction related costs\t6.8\nAmortization of other intangible assets\t1.6\nInterest expense\t.2\nGAAP pre-tax loss\t(6.1)\n", "q10k_tbl_81": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nNet investment income\t60.1\t8.4\t79.3\t30.7\nNet realized and unrealized investment gains\t293.6\t57.2\t277.6\t199.6\nRealized gain and unrealized investment gain from the MediaAlpha Transaction\t0\t0\t0\t182.2\nAdvertising and commission revenues\t2.1\t1.9\t6.1\t4.5\nOther revenues\t2.2\t2.6\t6.0\t3.6\nTotal revenues\t358.0\t70.1\t369.0\t420.6\nCost of sales\t2.3\t2.3\t6.5\t5.0\nGeneral and administrative expenses\t44.3\t27.7\t87.1\t87.2\nAmortization of other intangible assets\t.2\t0\t.6\t.1\nInterest expense\t.3\t.3\t.8\t.3\nTotal expenses\t47.1\t30.3\t95.0\t92.6\nPre-tax income\t310.9\t39.8\t274.0\t328.0\n", "q10k_tbl_82": "\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\n\t2020\t2019\t2020\t2019\nCommon equity securities\t7.9%\t1.0%\t1.6%\t18.4%\nOther long-term investments\t36.6%\t8.7%\t40.8%\t44.0%\nOther long-term investments - excluding MediaAlpha\t2.0%\t4.2%\t(1.4)%\t3.8%\nTotal common equity securities and other long-term investments\t34.2%\t5.1%\t33.5%\t27.6%\nTotal common equity securities and other long-term investments - excluding MediaAlpha\t5.4%\t2.5%\t0.9%\t14.3%\nS&P 500 Index (total return)\t8.9%\t1.7%\t5.6%\t20.6%\nFixed income investments\t0.8%\t1.3%\t4.4%\t5.7%\nBloomberg Barclays U.S. Intermediate Aggregate Index\t0.5%\t1.4%\t5.2%\t6.2%\nTotal consolidated portfolio\t13.5%\t3.1%\t15.4%\t15.9%\nTotal consolidated portfolio - excluding MediaAlpha\t2.8%\t1.8%\t2.8%\t9.9%\n", "q10k_tbl_83": "Currency $ in Millions\tFair Value\t% of Common Shareholders' Equity\nGBP\t135.0\t4.0%\nEUR\t32.6\t1.0%\nJPY\t18.4\t.5%\nAll other\t17.6\t.5%\nTotal\t203.6\t6.0%\n", "q10k_tbl_84": " in Millions\tSeptember 30 2020\tDecember 31 2019\nNSM Bank Facility net of unamortized issuance costs\t268.8\t217.4\nOther NSM debt net of unamortized issuance costs\t1.4\t1.8\nKudu Bank Facility net of unamortized issuance costs\t71.0\t53.6\nOther Operations debt net of unamortized issuance costs\t18.2\t10.7\nTotal debt\t359.4\t283.5\nNon-controlling interests-excluding BAM\t31.9\t29.9\nTotal White Mountains's common shareholders' equity\t3407.7\t3261.5\nTotal capital\t3799.0\t3574.9\nTime-value discount on expected future payments on the BAM Surplus Notes (1)\t(144.3)\t(151.6)\nHG Global's unearned premium reserve (1)\t181.0\t156.7\nHG Global's net deferred acquisition costs (1)\t(49.5)\t(41.5)\nTotal adjusted capital\t3786.2\t3538.5\nTotal debt to total adjusted capital\t9.5%\t8.0%\n", "q10k_tbl_85": "NSM Bank Facility\tThree Months Ended\t\tNine Months Ended\t\n\tSeptember 30\t\tSeptember 30\t\nMillions\t2020\t2019\t2020\t2019\nBeginning balance\t273.4\t222.3\t221.3\t180.4\nTerm loans\t\t\t\t\nBorrowings (1)\t0\t0\t52.4\t42.9\nRepayments\t(.7)\t(.4)\t(1.3)\t(1.4)\nForeign currency translation\t2.3\t0\t2.6\t0\nRevolving credit loan\t\t\t\t\nBorrowings\t0\t0\t0\t6.5\nRepayments\t0\t0\t0\t(6.5)\nEnding balance\t275.0\t221.9\t275.0\t221.9\n", "q10k_tbl_86": "\tGAAP book value per share\tAdjusted book value per share\nGAAP book value per share and adjusted book value per share respectively reported as of September 30 2020 (see reconciliation on page 51)\t1098.56\t1101.28\nEffect of revaluation of investment in MediaAlpha using the IPO price of $19.00 per share (1)\t(6.80)\t(6.85)\nReversal of DTL as of September 30 2020\t39.95\t40.20\nValue per share including the revaluation of investment in MediaAlpha using the IPO price of $19.00 per share (1) and the reversal of the DTL as of September 30 2020\t1131.71\t1134.63\nEffect of revaluation of investment in MediaAlpha from the IPO price of $19.00 per share to the October month-end closing price of $33.83 per share\t98.16\t98.77\nValue per share including the revaluation of investment in MediaAlpha using October month-end closing price of $33.83 per share (1) and the reversal of the DTL as of September 30 2020\t1229.87\t1233.40\n", "q10k_tbl_87": "\tFor the Three Months Ended September 30 2020\t\t\tFor the Nine Months Ended September 30 2020\t\t\n\tGAAP Returns\tRemove MediaAlpha\tReturns - Excluding MediaAlpha\tGAAP Returns\tRemove MediaAlpha\tReturns - Excluding MediaAlpha\nTotal consolidated portfolio returns\t13.5%\t(10.7)%\t2.8%\t15.4%\t(12.6)%\t2.8%\nCommon equity securities and other long-term investments returns\t34.2%\t(28.8)%\t5.4%\t33.5%\t(32.6)%\t0.9%\nOther long-term investments returns\t36.6%\t(34.6)%\t2.0%\t40.8%\t(42.2)%\t(1.4)%\n", "q10k_tbl_88": "\tFor the Three Months Ended September 30 2019\t\t\tFor the Nine Months Ended September 30 2019\t\t\n\tGAAP Returns\tRemove MediaAlpha\tReturns - Excluding MediaAlpha\tGAAP Returns\tRemove MediaAlpha\tReturns - Excluding MediaAlpha\nTotal consolidated portfolio returns\t3.1%\t(1.3)%\t1.8%\t15.9%\t(6.0)%\t9.9%\nCommon equity securities and other long-term investments returns\t5.1%\t(2.6)%\t2.5%\t27.6%\t(13.3)%\t14.3%\nOther long-term investments returns\t8.7%\t(4.5)%\t4.2%\t44.0%\t(40.2)%\t3.8%\n", "q10k_tbl_89": " in Billions\tIPO Scenario Probability\t\t\t\t\nIPO Valuation Assumptions\t55%\t60%\t65%\t70%\t75%\n1.1\t428\t432\t432\t437\t442\n1.2\t461\t466\t475\t481\t490\n1.4\t505\t515\t529\t539\t548\n", "q10k_tbl_90": " in Millions\tDiscount Rate(1)\t\t\t\t\nTerminal Exit Multiple\t-2%\t-1%\t18% - 23%\t+1%\t+2%\n+2\t388\t366\t347\t328\t311\n+1\t375\t355\t336\t318\t302\n6x - 12x\t363\t343\t326\t308\t293\n-1\t350\t332\t315\t299\t284\n-2\t338\t321\t306\t291\t278\n", "q10k_tbl_91": " in Millions\tDiscount Rate\t\t\t\t\nTerminal Revenue Growth Rate\t21%\t22%\t23%\t24%\t25%\n4.5%\t111\t103\t96\t90\t85\n4.0%\t109\t102\t95\t89\t84\n3.5%\t107\t100\t94\t88\t83\n", "q10k_tbl_92": "Months\tTotal Number of Shares Purchased\tAverage Price Paid per Share\tTotal Number of Shares Purchased as Part of Publicly Announced Plans (1)\tMaximum Number of Shares that May Yet Be Purchased Under the Plans (1)\nJuly 1-July 30 2020\t29967\t890.02\t29967\t547234\nAugust 1-August 31 2020\t3514\t881.31\t3514\t543720\nSeptember 1-September 30 2020\t1203\t819.85\t1203\t542517\nTotal\t34684\t886.70\t34684\t542517\n", "q10k_tbl_93": "(a)\tExhibit number\t\tName\n\t2.1\t0\tPlan of Reorganization (incorporated by reference herein to the Company's Registration Statement on S-4 (No. 333-87649) dated September 23 1999)\n\t2.2\t0\tSubscription and Purchase Agreement dated October 1 2020 by and among Ark Insurance Holdings Limited Bridge Holdings (Bermuda) Ltd. White Mountains Insurance Group Ltd. and the selling shareholders party thereto (incorporated by reference herein to Exhibit 2.1 of the Company's Current Report on Form 8-K dated October 1 2020)\n\t2.3\t0\tManagement Warranty Deed dated October 1 2020 by and among Ian Beaton Nicholas Bonnar Neil Smith and Bridge Holdings (Bermuda) Ltd. (incorporated by reference herein to Exhibit 2.2 of the Company's Current Report on Form 8-K dated October 1 2020)\n\t3.1\t0\tMemorandum of Continuance of the Company (incorporated by reference herein to Exhibit (3)(i) of the Company's Current Report on Form 8-K dated November 1 1999)\n\t3.2\t0\tAmended and Restated Bye-Laws of the Company (incorporated by reference herein to Exhibit 3 of the Company's Report on Form 10-Q dated May 2 2017)\n\t31.1\t0\tPrincipal Executive Officer Certification Pursuant to Rule 13a-14 (a) of the Securities Exchange Act of 1934 as Amended. *\n\t31.2\t0\tPrincipal Financial Officer Certification Pursuant to Rule 13a-14 (a) of the Securities Exchange Act of 1934 as Amended. *\n\t32.1\t0\tPrincipal Executive Officer Certification Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *\n\t32.2\t0\tPrincipal Financial Officer Certification Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. *\n\t101\t0\tXBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.\n"}{"bs": "q10k_tbl_74", "is": "q10k_tbl_50", "cf": "q10k_tbl_12"}None
☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF 1934
For the period ended September 30, 2020
OR
☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF 1934
For the transition period from to
Commission file number 1-8993
WHITE MOUNTAINS INSURANCE GROUP, LTD.
(Exact name of Registrant as specified in its charter)
Bermuda
(State or other jurisdiction of incorporation or organization)
94-2708455
23 South Main Street, Suite 3B
(I.R.S. Employer Identification No.)
Hanover,
03755-2053
New Hampshire
(Zip Code)
(Address of principal executive offices)
Registrant’s telephone number, including area code: (603) 640-2200
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Common Shares, par value $1.00
WTM
New York Stock Exchange
per share
Bermuda Stock Exchange
Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yesý No ☐
Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yesý No ☐
Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer
ý
Accelerated filer
☐
Non-accelerated filer
☐
Smaller reporting company
☐
Emerging growth company
☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o
Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ý
As of November 5, 2020, 3,102,011 common shares with a par value of $1.00 per share were outstanding (which includes 43,105 restricted common shares that were not vested at such date).