$WTM
WHITE MOUNTAINS INSURANCE GROUP LTD

2020 Q4 Form 10-Q Financial Statement

#000077686720000036 Filed on November 06, 2020

View on sec.gov

Income Statement

Concept 2020 Q4 2020 Q3 2019 Q4
Revenue $520.8M $459.5M $175.3M
YoY Change 197.09% 195.5% 2821.67%
Cost Of Revenue $2.300M
YoY Change 0.0%
Gross Profit $457.2M
YoY Change 198.43%
Gross Profit Margin 99.5%
Selling, General & Admin $144.0M $122.9M $109.3M
YoY Change 31.75% 28.56% -21.48%
% of Gross Profit 26.88%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization $14.40M $1.600M $9.300M
YoY Change 54.84% 14.29% 57.63%
% of Gross Profit 0.35%
Operating Expenses $156.9M $130.0M $117.4M
YoY Change 33.65% 27.83% -19.92%
Operating Profit $327.2M
YoY Change 535.34%
Interest Expense -$6.600M -$8.500M -$1.400M
YoY Change 371.43% 214.81% -60.0%
% of Operating Profit -2.6%
Other Income/Expense, Net
YoY Change
Pretax Income $357.3M $321.2M $56.50M
YoY Change 532.39% 528.57% -139.21%
Income Tax -$117.6M $98.50M $10.40M
% Of Pretax Income -32.91% 30.67% 18.41%
Net Earnings $489.2M $232.9M $60.90M
YoY Change 703.28% 378.23% -144.29%
Net Earnings / Revenue 93.93% 50.69% 34.74%
Basic Earnings Per Share $157.70 $75.09 $19.12
Diluted Earnings Per Share $157.70 $75.09 $19.12
COMMON SHARES
Basic Shares Outstanding 3.102M shares 3.059M shares 3.185M shares
Diluted Shares Outstanding 3.059M shares

Balance Sheet

Concept 2020 Q4 2020 Q3 2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents $84.60M $214.8M $161.0M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets $3.000M $55.00M
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment $38.00M $38.00M $23.00M
YoY Change 65.22% 65.22%
Goodwill $525.5M $540.1M $394.7M
YoY Change 33.14% 27.14% 3.9%
Intangibles
YoY Change
Long-Term Investments $2.939B $3.105B $2.947B
YoY Change -0.27% 9.25% 15.89%
Other Assets $649.0M $1.000M $3.000M
YoY Change 21533.33% -66.67% 0.0%
Total Long-Term Assets $4.828B $4.328B
YoY Change
TOTAL ASSETS
Total Short-Term Assets $3.000M $55.00M
Total Long-Term Assets $4.828B $4.328B
Total Assets $4.831B $4.383B $3.983B
YoY Change 21.29% 14.26% 18.46%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses $134.0M $100.0M $100.0M
YoY Change 34.0% 14.94% 156.41%
Deferred Revenue
YoY Change
Short-Term Debt $0.00 $0.00 $0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities $134.0M $106.0M $100.0M
YoY Change 34.0% 16.48% 36.99%
LONG-TERM LIABILITIES
Long-Term Debt $376.0M $359.0M $284.0M
YoY Change 32.39% 56.09% 47.15%
Other Long-Term Liabilities $152.0M $264.0M $155.0M
YoY Change -1.94% 78.38% 24.0%
Total Long-Term Liabilities $528.0M $623.0M $439.0M
YoY Change 20.27% 64.81% 38.05%
TOTAL LIABILITIES
Total Short-Term Liabilities $134.0M $106.0M $100.0M
Total Long-Term Liabilities $528.0M $623.0M $439.0M
Total Liabilities $1.014B $1.074B $838.5M
YoY Change 20.87% 40.34% 30.12%
SHAREHOLDERS EQUITY
Retained Earnings $3.311B $2.822B $2.672B
YoY Change 23.9% 8.06% 17.99%
Common Stock $595.2M $592.1M $596.3M
YoY Change -0.18% -0.19% 2.11%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity $3.906B $3.408B $3.262B
YoY Change
Total Liabilities & Shareholders Equity $4.831B $4.383B $3.983B
YoY Change 21.29% 14.26% 18.46%

Cashflow Statement

Concept 2020 Q4 2020 Q3 2019 Q4
OPERATING ACTIVITIES
Net Income $489.2M $232.9M $60.90M
YoY Change 703.28% 378.23% -144.29%
Depreciation, Depletion And Amortization $14.40M $1.600M $9.300M
YoY Change 54.84% 14.29% 57.63%
Cash From Operating Activities -$72.80M $51.10M -$48.00M
YoY Change 51.67% -168.78% 7900.0%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities $36.60M -$61.00M $600.0K
YoY Change 6000.0% -217.08% -101.22%
Cash From Investing Activities $36.60M -$61.00M $600.0K
YoY Change 6000.0% -217.08% -101.22%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities 35.20M 12.50M 57.80M
YoY Change -39.1% -42.4% 20.67%
NET CHANGE
Cash From Operating Activities -72.80M 51.10M -48.00M
Cash From Investing Activities 36.60M -61.00M 600.0K
Cash From Financing Activities 35.20M 12.50M 57.80M
Net Change In Cash -1.000M 2.600M 10.40M
YoY Change -109.62% -620.0% -647.37%
FREE CASH FLOW
Cash From Operating Activities -$72.80M $51.10M -$48.00M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame Concept Type Concept / XBRL Key Value Unit
dei Current Fiscal Year End Date
CurrentFiscalYearEndDate
--12-31
CY2019Q4 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
3185353 shares
CY2020Q3 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
3102011 shares
dei Document Fiscal Period Focus
DocumentFiscalPeriodFocus
Q3
dei Amendment Flag
AmendmentFlag
false
CY2020Q3 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
50000000 shares
dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2020
dei Entity Central Index Key
EntityCentralIndexKey
0000776867
us-gaap Cash Acquired From Acquisition
CashAcquiredFromAcquisition
12800000 USD
us-gaap Cash Acquired From Acquisition
CashAcquiredFromAcquisition
13400000 USD
CY2019Q4 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
1.00
CY2020Q3 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
1
CY2019Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
50000000 shares
CY2019Q4 us-gaap Common Stock Shares Outstanding
CommonStockSharesOutstanding
3185353 shares
CY2020Q3 us-gaap Common Stock Shares Outstanding
CommonStockSharesOutstanding
3102011 shares
CY2020Q3 us-gaap Operating Lease Liability Statement Of Financial Position Extensible List
OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList
us-gaap:OtherLiabilities
CY2020Q3 us-gaap Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List
OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList
us-gaap:OtherAssets
CY2018Q4 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
50000000 USD
CY2019Q3 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
67000000 USD
CY2019Q4 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
56300000 USD
CY2020Q3 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
82900000 USD
dei Document Type
DocumentType
10-Q
dei Document Quarterly Report
DocumentQuarterlyReport
true
dei Document Period End Date
DocumentPeriodEndDate
2020-09-30
dei Document Transition Report
DocumentTransitionReport
false
dei Entity File Number
EntityFileNumber
1-8993
dei Entity Registrant Name
EntityRegistrantName
WHITE MOUNTAINS INSURANCE GROUP, LTD
dei Entity Incorporation State Country Code
EntityIncorporationStateCountryCode
D0
dei Entity Tax Identification Number
EntityTaxIdentificationNumber
94-2708455
dei Entity Address Address Line1
EntityAddressAddressLine1
23 South Main Street, Suite 3B
dei Entity Address City Or Town
EntityAddressCityOrTown
Hanover,
dei Entity Address Postal Zip Code
EntityAddressPostalZipCode
03755-2053
dei Entity Address State Or Province
EntityAddressStateOrProvince
NH
dei City Area Code
CityAreaCode
603
dei Local Phone Number
LocalPhoneNumber
640-2200
dei Security12b Title
Security12bTitle
Common Shares, par value $1.00
dei Trading Symbol
TradingSymbol
WTM
dei Security Exchange Name
SecurityExchangeName
NYSE
dei Entity Current Reporting Status
EntityCurrentReportingStatus
Yes
dei Entity Interactive Data Current
EntityInteractiveDataCurrent
Yes
dei Entity Filer Category
EntityFilerCategory
Large Accelerated Filer
dei Entity Small Business
EntitySmallBusiness
false
dei Entity Emerging Growth Company
EntityEmergingGrowthCompany
false
dei Entity Shell Company
EntityShellCompany
false
CY2020Q4 dei Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
3102011 shares
CY2020Q3 us-gaap Assets
Assets
4383400000 USD
CY2019Q4 us-gaap Assets
Assets
3983200000 USD
CY2020Q3 us-gaap Liabilities
Liabilities
1074200000 USD
CY2019Q4 us-gaap Liabilities
Liabilities
838500000 USD
CY2020Q3 us-gaap Common Stock Value
CommonStockValue
592100000 USD
CY2019Q4 us-gaap Common Stock Value
CommonStockValue
596300000 USD
CY2020Q3 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
2822100000 USD
CY2019Q4 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
2672400000 USD
CY2020Q3 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-6500000 USD
CY2019Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-7200000 USD
CY2020Q3 us-gaap Stockholders Equity
StockholdersEquity
3407700000 USD
CY2019Q4 us-gaap Stockholders Equity
StockholdersEquity
3261500000 USD
CY2020Q3 us-gaap Minority Interest
MinorityInterest
-98500000 USD
CY2019Q4 us-gaap Minority Interest
MinorityInterest
-116800000 USD
CY2020Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3309200000 USD
CY2019Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3144700000 USD
CY2020Q3 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
4383400000 USD
CY2019Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
3983200000 USD
CY2020Q3 us-gaap Revenues
Revenues
459500000 USD
CY2019Q3 us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
51100000 USD
us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
287900000 USD
us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
18900000 USD
CY2020Q3 us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
222700000 USD
CY2019Q3 us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
42300000 USD
us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
190800000 USD
us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
329700000 USD
CY2020Q3 us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
-700000 USD
CY2019Q3 us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
900000 USD
us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
348600000 USD
CY2020Q3 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
98500000 USD
CY2019Q3 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
8800000 USD
us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
97100000 USD
CY2019Q3 us-gaap Revenues
Revenues
155500000 USD
us-gaap Revenues
Revenues
659900000 USD
us-gaap Revenues
Revenues
718100000 USD
CY2020Q3 us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
138300000 USD
CY2019Q3 us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
104400000 USD
us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
372000000.0 USD
us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
369500000 USD
CY2020Q3 us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
321200000 USD
us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
-800000 USD
us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
1600000 USD
CY2020Q3 us-gaap Profit Loss
ProfitLoss
222000000.0 USD
CY2019Q3 us-gaap Profit Loss
ProfitLoss
43200000 USD
us-gaap Profit Loss
ProfitLoss
190000000.0 USD
us-gaap Profit Loss
ProfitLoss
331300000 USD
CY2020Q3 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
-10900000 USD
CY2019Q3 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
-5500000 USD
us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
-29500000 USD
us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
-22300000 USD
CY2020Q3 us-gaap Net Income Loss
NetIncomeLoss
232900000 USD
CY2019Q3 us-gaap Net Income Loss
NetIncomeLoss
48700000 USD
us-gaap Net Income Loss
NetIncomeLoss
219500000 USD
us-gaap Net Income Loss
NetIncomeLoss
353600000 USD
CY2020Q3 us-gaap Net Income Loss
NetIncomeLoss
232900000 USD
CY2019Q3 us-gaap Net Income Loss
NetIncomeLoss
48700000 USD
us-gaap Net Income Loss
NetIncomeLoss
219500000 USD
us-gaap Net Income Loss
NetIncomeLoss
353600000 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
3900000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
-2400000 USD
us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
1000000.0 USD
us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
-5800000 USD
CY2020Q3 us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
236800000 USD
CY2019Q3 us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
46300000 USD
us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
220500000 USD
us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
347800000 USD
CY2020Q3 us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
100000 USD
CY2019Q3 us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
-100000 USD
us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
300000 USD
us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
-300000 USD
CY2020Q3 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
236700000 USD
CY2019Q3 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
46400000 USD
us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
220200000 USD
us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
348100000 USD
CY2020Q3 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
75.32
CY2019Q3 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
15.01
us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
70.40
us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
110.67
CY2020Q3 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
-0.23
CY2019Q3 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
0.28
us-gaap Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
-0.26
us-gaap Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
0.50
CY2020Q3 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
75.09
CY2019Q3 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
15.29
us-gaap Earnings Per Share Basic
EarningsPerShareBasic
70.14
us-gaap Earnings Per Share Basic
EarningsPerShareBasic
111.17
CY2020Q3 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
75.32
CY2019Q3 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
15.01
us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
70.40
us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
110.67
CY2020Q3 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
-0.23
CY2019Q3 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
0.28
us-gaap Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
-0.26
us-gaap Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
0.50
CY2020Q3 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
75.09
CY2019Q3 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
15.29
us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
70.14
us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
111.17
CY2020Q3 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0
CY2019Q3 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0
us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
1.00
us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
1.00
us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
12300000 USD
us-gaap Minority Interest Decrease From Redemptions
MinorityInterestDecreaseFromRedemptions
-800000 USD
wtm Noncontrolling Interest Recognitionof Equity Based Shares
NoncontrollingInterestRecognitionofEquityBasedShares
-1000000.0 USD
CY2020Q2 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3063300000 USD
CY2020Q3 us-gaap Profit Loss
ProfitLoss
222000000.0 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
4000000.0 USD
CY2020Q3 us-gaap Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
900000 USD
CY2020Q3 us-gaap Stock Repurchased And Retired During Period Value
StockRepurchasedAndRetiredDuringPeriodValue
100000 USD
CY2020Q3 us-gaap Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
200000 USD
CY2020Q3 us-gaap Minority Interest Period Increase Decrease
MinorityInterestPeriodIncreaseDecrease
-100000 USD
CY2020Q3 us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
3600000 USD
CY2020Q3 us-gaap Minority Interest Decrease From Redemptions
MinorityInterestDecreaseFromRedemptions
-800000 USD
CY2020Q3 wtm Noncontrolling Interest Recognitionof Equity Based Shares
NoncontrollingInterestRecognitionofEquityBasedShares
-1000000.0 USD
CY2020Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3309200000 USD
CY2019Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3144700000 USD
us-gaap Profit Loss
ProfitLoss
190000000.0 USD
us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
1000000.0 USD
us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
3200000 USD
us-gaap Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
2300000 USD
us-gaap Stock Repurchased And Retired During Period Value
StockRepurchasedAndRetiredDuringPeriodValue
85200000 USD
us-gaap Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
1500000 USD
us-gaap Minority Interest Period Increase Decrease
MinorityInterestPeriodIncreaseDecrease
1700000 USD
CY2020Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3309200000 USD
CY2019Q2 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3007900000 USD
CY2019Q3 us-gaap Profit Loss
ProfitLoss
43200000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
-2400000 USD
CY2019Q3 us-gaap Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
600000 USD
CY2019Q3 us-gaap Minority Interest Period Increase Decrease
MinorityInterestPeriodIncreaseDecrease
800000 USD
CY2019Q3 us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
2700000 USD
CY2019Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3070900000 USD
CY2018Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
2718200000 USD
us-gaap Profit Loss
ProfitLoss
331300000 USD
us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
-5800000 USD
us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
3200000 USD
us-gaap Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
1600000 USD
us-gaap Stock Repurchased And Retired During Period Value
StockRepurchasedAndRetiredDuringPeriodValue
4900000 USD
us-gaap Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
2200000 USD
us-gaap Minority Interest Period Increase Decrease
MinorityInterestPeriodIncreaseDecrease
2300000 USD
us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
7800000 USD
us-gaap Minority Interest Decrease From Redemptions
MinorityInterestDecreaseFromRedemptions
-1800000 USD
wtm Noncontrolling Interest Recognitionof Equity Based Shares
NoncontrollingInterestRecognitionofEquityBasedShares
-300000 USD
CY2019Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
3070900000 USD
us-gaap Profit Loss
ProfitLoss
190000000.0 USD
us-gaap Profit Loss
ProfitLoss
331300000 USD
us-gaap Gain Loss On Investments
GainLossOnInvestments
302800000 USD
us-gaap Gain Loss On Investments
GainLossOnInvestments
347800000 USD
us-gaap Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
0 USD
us-gaap Increase Decrease In Deferred Policy Acquisition Costs
IncreaseDecreaseInDeferredPolicyAcquisitionCosts
4000000.0 USD
us-gaap Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
67500000 USD
us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
87900000 USD
us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
11400000 USD
us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
-800000 USD
us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
1600000 USD
wtm Amortizationof Restricted Sharesand Option Awards
AmortizationofRestrictedSharesandOptionAwards
12200000 USD
wtm Amortizationof Restricted Sharesand Option Awards
AmortizationofRestrictedSharesandOptionAwards
8300000 USD
us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
27200000 USD
us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
19800000 USD
us-gaap Increase Decrease In Premiums Receivable
IncreaseDecreaseInPremiumsReceivable
-6000000.0 USD
us-gaap Increase Decrease In Premiums Receivable
IncreaseDecreaseInPremiumsReceivable
9400000 USD
us-gaap Increase Decrease In Other Accounts Payable
IncreaseDecreaseInOtherAccountsPayable
5300000 USD
us-gaap Increase Decrease In Other Accounts Payable
IncreaseDecreaseInOtherAccountsPayable
15400000 USD
us-gaap Increase Decrease In Unearned Premiums
IncreaseDecreaseInUnearnedPremiums
28600000 USD
us-gaap Increase Decrease In Unearned Premiums
IncreaseDecreaseInUnearnedPremiums
27500000 USD
us-gaap Increase Decrease In Deferred Policy Acquisition Costs
IncreaseDecreaseInDeferredPolicyAcquisitionCosts
2400000 USD
us-gaap Increase Decrease In Restricted Cash For Operating Activities
IncreaseDecreaseInRestrictedCashForOperatingActivities
-26600000 USD
us-gaap Increase Decrease In Restricted Cash For Operating Activities
IncreaseDecreaseInRestrictedCashForOperatingActivities
-17000000.0 USD
us-gaap Increase Decrease In Trading Securities
IncreaseDecreaseInTradingSecurities
57500000 USD
us-gaap Increase Decrease In Trading Securities
IncreaseDecreaseInTradingSecurities
74400000 USD
us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
8100000 USD
us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
100000 USD
us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
12200000 USD
us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
-72500000 USD
us-gaap Payments For Proceeds From Short Term Investments
PaymentsForProceedsFromShortTermInvestments
370300000 USD
us-gaap Payments For Proceeds From Short Term Investments
PaymentsForProceedsFromShortTermInvestments
54500000 USD
wtm Proceeds From Sale Of Trading Fixed Maturity And Convertible Fixed Maturity Investments
ProceedsFromSaleOfTradingFixedMaturityAndConvertibleFixedMaturityInvestments
293200000 USD
wtm Proceeds From Sale Of Trading Fixed Maturity And Convertible Fixed Maturity Investments
ProceedsFromSaleOfTradingFixedMaturityAndConvertibleFixedMaturityInvestments
292600000 USD
wtm Proceeds From Maturities Of Trading Fixed Maturity And Convertible Fixed Maturity Investments
ProceedsFromMaturitiesOfTradingFixedMaturityAndConvertibleFixedMaturityInvestments
135200000 USD
wtm Proceeds From Maturities Of Trading Fixed Maturity And Convertible Fixed Maturity Investments
ProceedsFromMaturitiesOfTradingFixedMaturityAndConvertibleFixedMaturityInvestments
92700000 USD
wtm Proceeds From Sale Of Trading Common Equity Securities
ProceedsFromSaleOfTradingCommonEquitySecurities
582900000 USD
wtm Proceeds From Sale Of Trading Common Equity Securities
ProceedsFromSaleOfTradingCommonEquitySecurities
442100000 USD
us-gaap Proceeds From Sale And Maturity Of Other Investments
ProceedsFromSaleAndMaturityOfOtherInvestments
64500000 USD
us-gaap Proceeds From Sale And Maturity Of Other Investments
ProceedsFromSaleAndMaturityOfOtherInvestments
28700000 USD
us-gaap Payments To Acquire Other Investments
PaymentsToAcquireOtherInvestments
61000000.0 USD
us-gaap Payments To Acquire Other Investments
PaymentsToAcquireOtherInvestments
173000000.0 USD
wtm Payments To Acquire Trading Common Equity Securities
PaymentsToAcquireTradingCommonEquitySecurities
33800000 USD
wtm Payments To Acquire Trading Common Equity Securities
PaymentsToAcquireTradingCommonEquitySecurities
4800000 USD
wtm Payments To Acquire Trading Fixed Maturity And Convertible Fixed Maturity Investments
PaymentsToAcquireTradingFixedMaturityAndConvertibleFixedMaturityInvestments
411300000 USD
wtm Payments To Acquire Trading Fixed Maturity And Convertible Fixed Maturity Investments
PaymentsToAcquireTradingFixedMaturityAndConvertibleFixedMaturityInvestments
428000000.0 USD
us-gaap Payments To Acquire Businesses And Interest In Affiliates
PaymentsToAcquireBusinessesAndInterestInAffiliates
129400000 USD
us-gaap Payments To Acquire Businesses And Interest In Affiliates
PaymentsToAcquireBusinessesAndInterestInAffiliates
243400000 USD
us-gaap Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
42000000.0 USD
us-gaap Payments Of Capital Distribution
PaymentsOfCapitalDistribution
27700000 USD
us-gaap Proceeds From Partnership Contribution
ProceedsFromPartnershipContribution
1600000 USD
us-gaap Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
12900000 USD
us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
28000000.0 USD
us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-60500000 USD
us-gaap Proceeds From Lines Of Credit
ProceedsFromLinesOfCredit
69400000 USD
us-gaap Proceeds From Lines Of Credit
ProceedsFromLinesOfCredit
149400000 USD
us-gaap Repayments Of Debt
RepaymentsOfDebt
2700000 USD
us-gaap Repayments Of Debt
RepaymentsOfDebt
22200000 USD
us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
3200000 USD
us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
3200000 USD
us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
78500000 USD
us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
0 USD
us-gaap Payments Of Capital Distribution
PaymentsOfCapitalDistribution
1200000 USD
us-gaap Payment For Contingent Consideration Liability Financing Activities
PaymentForContingentConsiderationLiabilityFinancingActivities
7000000.0 USD
us-gaap Payment For Contingent Consideration Liability Financing Activities
PaymentForContingentConsiderationLiabilityFinancingActivities
2600000 USD
wtm Repurchaseof Shares From Noncontrolling Interest Shareholders
RepurchaseofSharesFromNoncontrollingInterestShareholders
0 USD
wtm Repurchaseof Shares From Noncontrolling Interest Shareholders
RepurchaseofSharesFromNoncontrollingInterestShareholders
21100000 USD
wtm Proceeds From Issuanceof Sharesto Noncontrolling Interest Shareholders
ProceedsFromIssuanceofSharestoNoncontrollingInterestShareholders
0 USD
wtm Proceeds From Issuanceof Sharesto Noncontrolling Interest Shareholders
ProceedsFromIssuanceofSharestoNoncontrollingInterestShareholders
62700000 USD
us-gaap Proceeds From Partnership Contribution
ProceedsFromPartnershipContribution
2200000 USD
wtm Members Capital Contribution
MembersCapitalContribution
46900000 USD
wtm Members Capital Contribution
MembersCapitalContribution
42900000 USD
wtm Fidus Re Premium Payment
FidusRePremiumPayment
2300000 USD
wtm Fidus Re Premium Payment
FidusRePremiumPayment
2200000 USD
us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
-9800000 USD
us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
-4900000 USD
us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
13800000 USD
us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
172700000 USD
us-gaap Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
-200000 USD
us-gaap Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
-800000 USD
us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
53800000 USD
us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
38900000 USD
CY2019Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
161000000.0 USD
CY2018Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
110300000 USD
CY2020Q3 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
214800000 USD
CY2019Q3 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
149200000 USD
us-gaap Interest Paid Net
InterestPaidNet
11400000 USD
us-gaap Interest Paid Net
InterestPaidNet
11700000 USD
us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
100000 USD
us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
300000 USD
CY2019Q2 us-gaap Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
81400000 USD
us-gaap Use Of Estimates
UseOfEstimates
<div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</span></div><div style="line-height:120%;text-align:left;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In the third quarter of 2020, White Mountains changed the method used to value its investment in MediaAlpha from a discounted cash flow analysis to a probability-weighted expected return method ("PWERM"). Under the PWERM, MediaAlpha’s valuation is based on the probability-weighted present value of expected future equity values under two possible future scenarios: (i) an initial public offering (“IPO”) or (ii) remaining a private company. To determine the equity value in the IPO scenario, the value of the company was calculated using forward market multiples derived from a range of relevant companies and applied to MediaAlpha’s projected financial metrics. To determine the equity value in the remaining a private company scenario, the value of the company was calculated using a discounted cash flow model. The discounted cash flow model includes key inputs such as projections of future revenues and earnings, a discount rate and a terminal revenue growth rate. The expected future cash flows are based on management judgment, considering current performance, budgets and projected future results. The discount rates reflect MediaAlpha’s weighted average cost of capital considering comparable public company data, adjusted for risks specific to the business and industry. The terminal revenue growth rate is based on company, industry and macroeconomic expectations of perpetual revenue growth subsequent to the end of the discrete period in the discounted cash flow analysis.</span></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2019Q2 us-gaap Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
81400000 USD
CY2019Q1 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
23200000 USD
CY2020Q3 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
38300000 USD
CY2020Q3 us-gaap Operating Lease Liability
OperatingLeaseLiability
39100000 USD
CY2018Q1 us-gaap Other Commitment
OtherCommitment
125000000.0 USD
CY2020Q3 us-gaap Interest And Dividend Income Operating
InterestAndDividendIncomeOperating
71500000 USD
CY2019Q3 us-gaap Interest And Dividend Income Operating
InterestAndDividendIncomeOperating
18800000 USD
us-gaap Interest And Dividend Income Operating
InterestAndDividendIncomeOperating
114600000 USD
us-gaap Interest And Dividend Income Operating
InterestAndDividendIncomeOperating
56500000 USD
CY2020Q3 us-gaap Investment Income Investment Expense
InvestmentIncomeInvestmentExpense
300000 USD
CY2019Q3 us-gaap Investment Income Investment Expense
InvestmentIncomeInvestmentExpense
400000 USD
us-gaap Investment Income Investment Expense
InvestmentIncomeInvestmentExpense
900000 USD
us-gaap Investment Income Investment Expense
InvestmentIncomeInvestmentExpense
1100000 USD
CY2020Q3 us-gaap Net Investment Income
NetInvestmentIncome
71200000 USD
CY2019Q3 us-gaap Net Investment Income
NetInvestmentIncome
18400000 USD
us-gaap Net Investment Income
NetInvestmentIncome
113700000 USD
us-gaap Gain Loss On Sale Of Investments
GainLossOnSaleOfInvestments
-29600000 USD
us-gaap Gain Loss On Sale Of Investments
GainLossOnSaleOfInvestments
-12400000 USD
us-gaap Net Investment Income
NetInvestmentIncome
55400000 USD
CY2020Q3 us-gaap Gain Loss On Investments
GainLossOnInvestments
306600000 USD
CY2019Q3 us-gaap Gain Loss On Investments
GainLossOnInvestments
67000000.0 USD
us-gaap Gain Loss On Investments
GainLossOnInvestments
302800000 USD
us-gaap Gain Loss On Investments
GainLossOnInvestments
347800000 USD
CY2020Q3 us-gaap Gain Loss On Sale Of Investments
GainLossOnSaleOfInvestments
-36100000 USD
CY2019Q3 us-gaap Gain Loss On Sale Of Investments
GainLossOnSaleOfInvestments
0 USD
CY2020Q3 us-gaap Other Long Term Investments
OtherLongTermInvestments
1171200000 USD
CY2019Q4 us-gaap Other Long Term Investments
OtherLongTermInvestments
856300000 USD
wtm Percentage Of Investments Recorded At Fair Value
PercentageOfInvestmentsRecordedAtFairValue
0.62
CY2019 wtm Percentage Of Investments Recorded At Fair Value
PercentageOfInvestmentsRecordedAtFairValue
0.71
CY2019Q4 us-gaap Investments Fair Value Disclosure
InvestmentsFairValueDisclosure
2746000000.0 USD
wtm Fair Value Assets Measured On Recurring Basis Gain Loss Included In Earnings
FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
-302400000 USD
us-gaap Accretion Amortization Of Discounts And Premiums Investments
AccretionAmortizationOfDiscountsAndPremiumsInvestments
3000000.0 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
563600000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
1075600000 USD
wtm Fair Value Assets Measured On Recurring Basis Transfers In
FairValueAssetsMeasuredOnRecurringBasisTransfersIn
0 USD
wtm Fair Value Assets Measured On Recurring Basis Transfers Out
FairValueAssetsMeasuredOnRecurringBasisTransfersOut
0 USD
CY2020Q3 us-gaap Investments Fair Value Disclosure
InvestmentsFairValueDisclosure
2533400000 USD
CY2018Q4 us-gaap Investments Fair Value Disclosure
InvestmentsFairValueDisclosure
2328700000 USD
wtm Fair Value Assets Measured On Recurring Basis Gain Loss Included In Earnings
FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInEarnings
-347500000 USD
us-gaap Accretion Amortization Of Discounts And Premiums Investments
AccretionAmortizationOfDiscountsAndPremiumsInvestments
1000000.0 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
750400000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
856200000 USD
wtm Fair Value Assets Measured On Recurring Basis Transfers In
FairValueAssetsMeasuredOnRecurringBasisTransfersIn
82600000 USD
wtm Fair Value Assets Measured On Recurring Basis Transfers Out
FairValueAssetsMeasuredOnRecurringBasisTransfersOut
82600000 USD
CY2019Q3 us-gaap Investments Fair Value Disclosure
InvestmentsFairValueDisclosure
2569400000 USD
CY2020Q3 us-gaap Goodwill Fair Value Disclosure
GoodwillFairValueDisclosure
540100000 USD
CY2020Q3 us-gaap Goodwill
Goodwill
540100000 USD
CY2019Q4 us-gaap Goodwill Fair Value Disclosure
GoodwillFairValueDisclosure
402300000 USD
CY2019 us-gaap Goodwill Impairment Loss
GoodwillImpairmentLoss
7600000 USD
CY2019Q4 us-gaap Goodwill
Goodwill
394700000 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Fair Value Disclosure
FiniteLivedIntangibleAssetsFairValueDisclosure
285700000 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
43300000 USD
us-gaap Impairment Of Intangible Assets Finitelived
ImpairmentOfIntangibleAssetsFinitelived
6200000 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
236200000 USD
CY2019Q4 us-gaap Finite Lived Intangible Assets Fair Value Disclosure
FiniteLivedIntangibleAssetsFairValueDisclosure
292100000 USD
CY2019Q4 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
29300000 USD
CY2019 us-gaap Impairment Of Intangible Assets Finitelived
ImpairmentOfIntangibleAssetsFinitelived
2800000 USD
CY2019Q4 us-gaap Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
260000000.0 USD
CY2020Q3 wtm Intangible Assets Including Goodwill Fair Value Disclosure
IntangibleAssetsIncludingGoodwillFairValueDisclosure
825800000 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
43300000 USD
wtm Impairmentof Intangible Assets Including Goodwill
ImpairmentofIntangibleAssetsIncludingGoodwill
6200000 USD
CY2020Q3 us-gaap Intangible Assets Net Including Goodwill
IntangibleAssetsNetIncludingGoodwill
776300000 USD
CY2019Q4 wtm Intangible Assets Including Goodwill Fair Value Disclosure
IntangibleAssetsIncludingGoodwillFairValueDisclosure
694400000 USD
CY2019Q4 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
29300000 USD
CY2019 wtm Impairmentof Intangible Assets Including Goodwill
ImpairmentofIntangibleAssetsIncludingGoodwill
10400000 USD
CY2019Q4 us-gaap Intangible Assets Net Including Goodwill
IntangibleAssetsNetIncludingGoodwill
654700000 USD
CY2020Q3 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
5400000 USD
CY2019Q3 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
4600000 USD
CY2020Q3 us-gaap Long Term Debt
LongTermDebt
359400000 USD
CY2019Q4 us-gaap Long Term Debt
LongTermDebt
283500000 USD
CY2020Q1 us-gaap Line Of Credit Facility Maximum Borrowing Capacity
LineOfCreditFacilityMaximumBorrowingCapacity
234000000.0 USD
CY2020Q2 us-gaap Line Of Credit Facility Maximum Borrowing Capacity
LineOfCreditFacilityMaximumBorrowingCapacity
291400000 USD
CY2020Q3 wtm Numberof Secured Credit Facilities
NumberofSecuredCreditFacilities
2 credit_facility
CY2020Q3 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.307
us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.337
us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
CY2019Q3 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.172
us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.054
us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
wtm Percentchangeindiscountedfuturecashflows
Percentchangeindiscountedfuturecashflows
0.10
wtm Percentchangeindiscountedfuturecashflows
Percentchangeindiscountedfuturecashflows
0.10
wtm Income Loss Allocated To Participating Unvested Restricted Common Shares
IncomeLossAllocatedToParticipatingUnvestedRestrictedCommonShares
-2900000 USD
wtm Income Loss Allocated To Participating Unvested Restricted Common Shares
IncomeLossAllocatedToParticipatingUnvestedRestrictedCommonShares
-4400000 USD
CY2020Q3 wtm Net Income Loss Attributableto Parent Basicand Diluted Earnings Per Share Numerators
NetIncomeLossAttributabletoParentBasicandDilutedEarningsPerShareNumerators
230400000 USD
CY2019Q3 wtm Net Income Loss Attributableto Parent Basicand Diluted Earnings Per Share Numerators
NetIncomeLossAttributabletoParentBasicandDilutedEarningsPerShareNumerators
47100000 USD
wtm Net Income Loss Attributableto Parent Basicand Diluted Earnings Per Share Numerators
NetIncomeLossAttributabletoParentBasicandDilutedEarningsPerShareNumerators
217400000 USD
wtm Net Income Loss Attributableto Parent Basicand Diluted Earnings Per Share Numerators
NetIncomeLossAttributabletoParentBasicandDilutedEarningsPerShareNumerators
347600000 USD
CY2019Q3 wtm Income Loss Allocated To Participating Unvested Restricted Common Shares
IncomeLossAllocatedToParticipatingUnvestedRestrictedCommonShares
-700000 USD
CY2020Q3 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
232900000 USD
CY2019Q3 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
48700000 USD
us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
219500000 USD
us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
353600000 USD
CY2020Q3 us-gaap Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
700000 USD
CY2019Q3 us-gaap Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
-900000 USD
us-gaap Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
800000 USD
us-gaap Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
-1600000 USD
CY2020Q3 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
233600000 USD
CY2019Q3 us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
47800000 USD
us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
220300000 USD
us-gaap Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
352000000.0 USD
CY2020Q3 wtm Income Loss Allocated To Participating Unvested Restricted Common Shares
IncomeLossAllocatedToParticipatingUnvestedRestrictedCommonShares
-3200000 USD
us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
39600 shares
CY2020Q3 us-gaap Weighted Average Number Of Shares Issued Basic
WeightedAverageNumberOfSharesIssuedBasic
3101800 shares
CY2019Q3 us-gaap Weighted Average Number Of Shares Issued Basic
WeightedAverageNumberOfSharesIssuedBasic
3185400 shares
us-gaap Weighted Average Number Of Shares Issued Basic
WeightedAverageNumberOfSharesIssuedBasic
3129000.0 shares
us-gaap Weighted Average Number Of Shares Issued Basic
WeightedAverageNumberOfSharesIssuedBasic
3180400 shares
CY2020Q3 us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
43100 shares
CY2019Q3 us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
43400 shares
us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
40000.0 shares
CY2020Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
3058700 shares
CY2019Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
3142000.0 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
3089000.0 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
3140800 shares
CY2020Q3 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
3101800 shares
CY2019Q3 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
3185400 shares
us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
3129000.0 shares
us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
3180400 shares
CY2020Q3 us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
43100 shares
CY2019Q3 us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
43400 shares
us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
40000.0 shares
us-gaap Weighted Average Number Of Shares Restricted Stock
WeightedAverageNumberOfSharesRestrictedStock
39600 shares
CY2020Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
3058700 shares
CY2019Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
3142000.0 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
3089000.0 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
3140800 shares
CY2020Q3 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0
CY2019Q3 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0
us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
1.00
us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
1.00
CY2020Q3 us-gaap Earnings Per Share Diluted Undistributed
EarningsPerShareDilutedUndistributed
75.32
CY2019Q3 us-gaap Earnings Per Share Diluted Undistributed
EarningsPerShareDilutedUndistributed
15.01
us-gaap Earnings Per Share Diluted Undistributed
EarningsPerShareDilutedUndistributed
69.40
us-gaap Earnings Per Share Diluted Undistributed
EarningsPerShareDilutedUndistributed
109.67
CY2020Q3 us-gaap Earnings Per Share Basic And Diluted
EarningsPerShareBasicAndDiluted
75.32
CY2019Q3 us-gaap Earnings Per Share Basic And Diluted
EarningsPerShareBasicAndDiluted
15.01
us-gaap Earnings Per Share Basic And Diluted
EarningsPerShareBasicAndDiluted
70.40
us-gaap Earnings Per Share Basic And Diluted
EarningsPerShareBasicAndDiluted
110.67
CY2020Q3 wtm Net Income Loss Attributableto Parent Netof Restricted Common Share Amounts
NetIncomeLossAttributabletoParentNetofRestrictedCommonShareAmounts
230400000 USD
CY2019Q3 wtm Net Income Loss Attributableto Parent Netof Restricted Common Share Amounts
NetIncomeLossAttributabletoParentNetofRestrictedCommonShareAmounts
47100000 USD
wtm Net Income Loss Attributableto Parent Netof Restricted Common Share Amounts
NetIncomeLossAttributabletoParentNetofRestrictedCommonShareAmounts
217400000 USD
wtm Net Income Loss Attributableto Parent Netof Restricted Common Share Amounts
NetIncomeLossAttributabletoParentNetofRestrictedCommonShareAmounts
347600000 USD
CY2020Q3 us-gaap Dividends
Dividends
0 USD
CY2019Q3 us-gaap Dividends
Dividends
0 USD
us-gaap Dividends
Dividends
3100000 USD
us-gaap Dividends
Dividends
3200000 USD
CY2020Q3 us-gaap Undistributed Earnings
UndistributedEarnings
230400000 USD
CY2019Q3 us-gaap Undistributed Earnings
UndistributedEarnings
47100000 USD
us-gaap Undistributed Earnings
UndistributedEarnings
214300000 USD
us-gaap Undistributed Earnings
UndistributedEarnings
344400000 USD
CY2019Q1 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
23200000 USD
CY2019Q1 us-gaap Operating Lease Liability
OperatingLeaseLiability
23200000 USD
CY2020Q3 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
38300000 USD
CY2019Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
22600000 USD
CY2020Q3 us-gaap Operating Lease Liability
OperatingLeaseLiability
39100000 USD
CY2019Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
22800000 USD
CY2020Q3 us-gaap Operating Lease Cost
OperatingLeaseCost
1600000 USD
CY2019Q3 us-gaap Operating Lease Cost
OperatingLeaseCost
1900000 USD
us-gaap Operating Lease Cost
OperatingLeaseCost
5700000 USD
us-gaap Operating Lease Cost
OperatingLeaseCost
5400000 USD
CY2020Q3 us-gaap Sublease Income
SubleaseIncome
100000 USD
CY2019Q3 us-gaap Sublease Income
SubleaseIncome
100000 USD
us-gaap Sublease Income
SubleaseIncome
300000 USD
us-gaap Sublease Income
SubleaseIncome
300000 USD
CY2020Q3 us-gaap Lease Cost
LeaseCost
1500000 USD
CY2019Q3 us-gaap Lease Cost
LeaseCost
1800000 USD
us-gaap Lease Cost
LeaseCost
5400000 USD
us-gaap Lease Cost
LeaseCost
5100000 USD
CY2020Q3 us-gaap Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
1800000 USD
CY2020Q3 us-gaap Lessee Operating Lease Liability Payments Due Next Twelve Months
LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
7600000 USD
CY2020Q3 us-gaap Lessee Operating Lease Liability Payments Due Year Two
LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
7100000 USD
CY2020Q3 us-gaap Lessee Operating Lease Liability Payments Due Year Three
LesseeOperatingLeaseLiabilityPaymentsDueYearThree
6900000 USD
CY2020Q3 us-gaap Lessee Operating Lease Liability Payments Due Year Four
LesseeOperatingLeaseLiabilityPaymentsDueYearFour
5700000 USD
CY2020Q3 wtm Lessee Operating Lease Liabilitytobe Paid After Year Four
LesseeOperatingLeaseLiabilitytobePaidAfterYearFour
17200000 USD
CY2020Q3 us-gaap Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
46300000 USD
CY2020Q3 us-gaap Lessee Operating Lease Liability Undiscounted Excess Amount
LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
7200000 USD
CY2020Q3 us-gaap Operating Lease Liability
OperatingLeaseLiability
39100000 USD
CY2020Q3 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
38300000 USD
CY2020Q3 us-gaap Operating Lease Weighted Average Discount Rate Percent
OperatingLeaseWeightedAverageDiscountRatePercent
0.046
CY2020Q3 us-gaap Operating Lease Liability
OperatingLeaseLiability
39100000 USD
CY2019Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
22600000 USD
CY2019Q4 us-gaap Operating Lease Weighted Average Discount Rate Percent
OperatingLeaseWeightedAverageDiscountRatePercent
0.046
CY2019Q4 us-gaap Operating Lease Liability
OperatingLeaseLiability
22800000 USD
CY2020Q3 us-gaap Minority Interest
MinorityInterest
-98500000 USD
CY2019Q4 us-gaap Minority Interest
MinorityInterest
-116800000 USD
us-gaap Number Of Operating Segments
NumberOfOperatingSegments
4 segments
CY2020Q3 us-gaap Premiums Earned Net
PremiumsEarnedNet
6200000 USD
CY2020Q3 us-gaap Net Investment Income
NetInvestmentIncome
71200000 USD
CY2020Q3 us-gaap Investment Company Realized And Unrealized Gain Loss On Investment And Foreign Currency
InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency
306600000 USD
CY2020Q3 wtm Commission Revenue
CommissionRevenue
60300000 USD
CY2020Q3 us-gaap Other Income
OtherIncome
15200000 USD
CY2020Q3 us-gaap Revenues
Revenues
459500000 USD
CY2020Q3 us-gaap Deferred Policy Acquisition Cost Amortization Expense
DeferredPolicyAcquisitionCostAmortizationExpense
1600000 USD
CY2020Q3 us-gaap Other Underwriting Expense
OtherUnderwritingExpense
100000 USD
CY2020Q3 us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
2300000 USD
CY2020Q3 us-gaap General And Administrative Expense
GeneralAndAdministrativeExpense
103300000 USD
CY2020Q3 wtm Broker Commission Expense
BrokerCommissionExpense
17100000 USD
CY2020Q3 us-gaap Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1
BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
700000 USD
CY2020Q3 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
5400000 USD
CY2020Q3 us-gaap Interest Expense Debt
InterestExpenseDebt
7800000 USD
CY2020Q3 us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
138300000 USD
CY2020Q3 us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
321200000 USD
us-gaap Premiums Earned Net
PremiumsEarnedNet
17200000 USD
us-gaap Net Investment Income
NetInvestmentIncome
113700000 USD
us-gaap Investment Company Realized And Unrealized Gain Loss On Investment And Foreign Currency
InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency
302800000 USD
wtm Commission Revenue
CommissionRevenue
180300000 USD
us-gaap Other Income
OtherIncome
45900000 USD
us-gaap Revenues
Revenues
659900000 USD
us-gaap Deferred Policy Acquisition Cost Amortization Expense
DeferredPolicyAcquisitionCostAmortizationExpense
5400000 USD
us-gaap Other Underwriting Expense
OtherUnderwritingExpense
300000 USD
us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
6500000 USD
us-gaap General And Administrative Expense
GeneralAndAdministrativeExpense
266700000 USD
wtm Broker Commission Expense
BrokerCommissionExpense
56400000 USD
us-gaap Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1
BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
-1600000 USD
us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
17100000 USD
us-gaap Interest Expense Debt
InterestExpenseDebt
21200000 USD
us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
372000000.0 USD
us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
287900000 USD
CY2019Q3 us-gaap Premiums Earned Net
PremiumsEarnedNet
5200000 USD
CY2019Q3 us-gaap Net Investment Income
NetInvestmentIncome
18400000 USD
CY2019Q3 us-gaap Investment Company Realized And Unrealized Gain Loss On Investment And Foreign Currency
InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency
67000000.0 USD
CY2019Q3 wtm Commission Revenue
CommissionRevenue
51300000 USD
CY2019Q3 us-gaap Other Income
OtherIncome
13600000 USD
CY2019Q3 us-gaap Revenues
Revenues
155500000 USD
CY2019Q3 us-gaap Deferred Policy Acquisition Cost Amortization Expense
DeferredPolicyAcquisitionCostAmortizationExpense
1400000 USD
CY2019Q3 us-gaap Other Underwriting Expense
OtherUnderwritingExpense
100000 USD
CY2019Q3 us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
2300000 USD
CY2019Q3 us-gaap General And Administrative Expense
GeneralAndAdministrativeExpense
78000000.0 USD
CY2019Q3 wtm Broker Commission Expense
BrokerCommissionExpense
15300000 USD
CY2019Q3 us-gaap Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1
BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
-2000000.0 USD
CY2019Q3 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
4600000 USD
CY2019Q3 us-gaap Interest Expense Debt
InterestExpenseDebt
4700000 USD
CY2019Q3 us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
104400000 USD
CY2019Q3 us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
51100000 USD
us-gaap Premiums Earned Net
PremiumsEarnedNet
13700000 USD
us-gaap Net Investment Income
NetInvestmentIncome
55400000 USD
us-gaap Investment Company Realized And Unrealized Gain Loss On Investment And Foreign Currency
InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency
233100000 USD
wtm Realizedand Unrealized Gainsfrom Transaction
RealizedandUnrealizedGainsfromTransaction
182200000 USD
wtm Commission Revenue
CommissionRevenue
200900000 USD
us-gaap Other Income
OtherIncome
32800000 USD
us-gaap Revenues
Revenues
718100000 USD
us-gaap Deferred Policy Acquisition Cost Amortization Expense
DeferredPolicyAcquisitionCostAmortizationExpense
4100000 USD
us-gaap Other Underwriting Expense
OtherUnderwritingExpense
300000 USD
us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
45600000 USD
us-gaap General And Administrative Expense
GeneralAndAdministrativeExpense
236900000 USD
wtm Broker Commission Expense
BrokerCommissionExpense
48900000 USD
us-gaap Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1
BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
5600000 USD
us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
15400000 USD
us-gaap Interest Expense Debt
InterestExpenseDebt
12700000 USD
us-gaap Benefits Losses And Expenses
BenefitsLossesAndExpenses
369500000 USD
us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
348600000 USD
CY2020Q3 us-gaap Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
74800000 USD
CY2020Q3 wtm Other Revenue
OtherRevenue
384700000 USD
CY2020Q3 us-gaap Revenues
Revenues
459500000 USD
us-gaap Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
224300000 USD
wtm Other Revenue
OtherRevenue
435600000 USD
us-gaap Revenues
Revenues
659900000 USD
CY2019Q3 us-gaap Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
64300000 USD
CY2019Q3 wtm Other Revenue
OtherRevenue
91200000 USD
CY2019Q3 us-gaap Revenues
Revenues
155500000 USD
us-gaap Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
231700000 USD
wtm Other Revenue
OtherRevenue
486400000 USD
us-gaap Revenues
Revenues
718100000 USD
CY2020Q3 us-gaap Other Long Term Investments
OtherLongTermInvestments
1171200000 USD
CY2019Q4 us-gaap Other Long Term Investments
OtherLongTermInvestments
856300000 USD
us-gaap Loss Contingency Disclosures
LossContingencyDisclosures
Commitments and Contingencies<div style="line-height:120%;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Legal Contingencies</span></div><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">White Mountains is subject to litigation and arbitration in the normal course of business. White Mountains considers the requirements of ASC 450 when evaluating its exposure to litigation and arbitration. ASC 450 requires that accruals be established for litigation and arbitration if it is probable that a loss has been incurred and it can be reasonably estimated. ASC 450 also requires that litigation and arbitration be disclosed if it is probable that a loss has been incurred or if there is a reasonable possibility that a loss may have been incurred. White Mountains does not have any current litigation that may have a material adverse effect on White Mountains’s financial condition, results of operations or cash flows. </span></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The following description presents significant legal contingencies, ongoing non-claims related litigation or arbitration as of </span><span style="font-family:inherit;font-size:10pt;">September 30, 2020</span><span style="font-family:inherit;font-size:10pt;">: </span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Esurance</span></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">On October 7, 2011, the Company completed the sale of its Esurance Holdings, Inc. and its subsidiaries and Answer Financial Inc. and its subsidiaries (collectively, “Esurance”) to The Allstate Corporation (“Allstate”) pursuant to a Stock Purchase Agreement dated as of May 17, 2011. Subject to specified thresholds and limits, the Company remains contingently liable to Allstate for specified matters related to the pre-closing period, including (a) losses of Esurance arising from extra-contractual claims and claims in excess of policy limits, (b) certain corporate reorganizations effected to remove entities from Esurance that were not being sold in the transaction, and (c) certain tax matters, including certain net operating losses being less than stated levels. </span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Sirius Group Tax Contingency</span></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">A subsidiary of Sirius International Insurance Group, Ltd. (“Sirius Group”), which was sold by White Mountains in 2016, has been denied interest deductions by the Swedish Tax Authority (“STA”) for tax years 2013-2016.  In October 2018, the Swedish Administrative Court ruled against Sirius Group on its appeal of the Swedish Tax Agency’s denial of certain interest deductions relating to periods prior to the sale of Sirius Group to CM International Holding PTE Ltd, the Singapore-based investment arm of China Minsheng Investment Corp., Ltd. In connection with the sale, White Mountains indemnified Sirius Group against the loss of certain tax attributes, including those related to these interest deductions. As of </span><span style="font-family:inherit;font-size:10pt;">September 30, 2020</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">December 31, 2019</span><span style="font-family:inherit;font-size:10pt;">, White Mountains reported a liability of </span><span style="font-family:inherit;font-size:10pt;"><span>$17.2 million</span></span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;"><span>$16.5 million</span></span><span style="font-family:inherit;font-size:10pt;">, reflecting the value of these interest deductions. For both the three and nine months ended </span><span style="font-family:inherit;font-size:10pt;">September 30, 2020</span><span style="font-family:inherit;font-size:10pt;">, the change in the liability of </span><span style="font-family:inherit;font-size:10pt;"><span>$0.7 million</span></span><span style="font-family:inherit;font-size:10pt;"> was related to foreign currency translation and included within net loss on sale of discontinued operations. For the three and nine months ended </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;">, the decrease in the liability of </span><span style="font-family:inherit;font-size:10pt;"><span>$0.9 million</span></span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;"><span>$1.6 million</span></span><span style="font-family:inherit;font-size:10pt;"> was related to foreign currency translation and included within net gain on sale of discontinued operations. Sirius Group has appealed the decision to the Swedish Administrative Court of Appeal.</span></div>
CY2019Q3 us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
900000 USD
us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
1600000 USD
CY2019Q3 us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
900000 USD
us-gaap Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
1600000 USD

Files In Submission

Name View Source Status
0000776867-20-000036-index-headers.html Edgar Link pending
0000776867-20-000036-index.html Edgar Link pending
0000776867-20-000036.txt Edgar Link pending
0000776867-20-000036-xbrl.zip Edgar Link pending
FilingSummary.xml Edgar Link unprocessable
Financial_Report.xlsx Edgar Link pending
MetaLinks.json Edgar Link pending
R1.htm Edgar Link pending
R10.htm Edgar Link pending
R11.htm Edgar Link pending
R12.htm Edgar Link pending
R13.htm Edgar Link pending
R14.htm Edgar Link pending
R15.htm Edgar Link pending
R16.htm Edgar Link pending
R17.htm Edgar Link pending
R18.htm Edgar Link pending
R19.htm Edgar Link pending
R2.htm Edgar Link pending
R20.htm Edgar Link pending
R21.htm Edgar Link pending
R22.htm Edgar Link pending
R23.htm Edgar Link pending
R24.htm Edgar Link pending
R25.htm Edgar Link pending
R26.htm Edgar Link pending
R27.htm Edgar Link pending
R28.htm Edgar Link pending
R29.htm Edgar Link pending
R3.htm Edgar Link pending
R30.htm Edgar Link pending
R31.htm Edgar Link pending
R32.htm Edgar Link pending
R33.htm Edgar Link pending
R34.htm Edgar Link pending
R35.htm Edgar Link pending
R36.htm Edgar Link pending
R37.htm Edgar Link pending
R38.htm Edgar Link pending
R39.htm Edgar Link pending
R4.htm Edgar Link pending
R40.htm Edgar Link pending
R41.htm Edgar Link pending
R42.htm Edgar Link pending
R43.htm Edgar Link pending
R44.htm Edgar Link pending
R45.htm Edgar Link pending
R46.htm Edgar Link pending
R47.htm Edgar Link pending
R48.htm Edgar Link pending
R49.htm Edgar Link pending
R5.htm Edgar Link pending
R50.htm Edgar Link pending
R51.htm Edgar Link pending
R52.htm Edgar Link pending
R53.htm Edgar Link pending
R54.htm Edgar Link pending
R55.htm Edgar Link pending
R56.htm Edgar Link pending
R57.htm Edgar Link pending
R58.htm Edgar Link pending
R59.htm Edgar Link pending
R6.htm Edgar Link pending
R60.htm Edgar Link pending
R61.htm Edgar Link pending
R62.htm Edgar Link pending
R63.htm Edgar Link pending
R64.htm Edgar Link pending
R65.htm Edgar Link pending
R66.htm Edgar Link pending
R67.htm Edgar Link pending
R68.htm Edgar Link pending
R69.htm Edgar Link pending
R7.htm Edgar Link pending
R70.htm Edgar Link pending
R71.htm Edgar Link pending
R72.htm Edgar Link pending
R73.htm Edgar Link pending
R74.htm Edgar Link pending
R75.htm Edgar Link pending
R76.htm Edgar Link pending
R77.htm Edgar Link pending
R78.htm Edgar Link pending
R79.htm Edgar Link pending
R8.htm Edgar Link pending
R80.htm Edgar Link pending
R81.htm Edgar Link pending
R82.htm Edgar Link pending
R83.htm Edgar Link pending
R84.htm Edgar Link pending
R85.htm Edgar Link pending
R86.htm Edgar Link pending
R87.htm Edgar Link pending
R88.htm Edgar Link pending
R89.htm Edgar Link pending
R9.htm Edgar Link pending
R90.htm Edgar Link pending
R91.htm Edgar Link pending
R92.htm Edgar Link pending
R93.htm Edgar Link pending
report.css Edgar Link pending
Show.js Edgar Link pending
wtm-20200930.xsd Edgar Link pending
wtm-20200930_cal.xml Edgar Link unprocessable
wtm-20200930_def.xml Edgar Link unprocessable
wtm-20200930_lab.xml Edgar Link unprocessable
wtm-20200930_pre.xml Edgar Link unprocessable
wtm10-q9302020.htm Edgar Link pending
wtm10-q9302020_htm.xml Edgar Link completed
wtmq32020ex311.htm Edgar Link pending
wtmq32020ex312.htm Edgar Link pending
wtmq32020ex321.htm Edgar Link pending
wtmq32020ex322.htm Edgar Link pending