$rga 2017 Q4 10-K

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$3.232B	$3.145B	$3.129B
YoY Change	5.32%	8.44%	2.97%
Cost Of Revenue		$2.101B	$2.164B
YoY Change		5.4%	8.35%
Gross Profit		$1.045B	$964.9M
YoY Change		15.11%	-7.36%
Gross Profit Margin		33.21%	30.84%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$31.50M	$7.500M	$7.100M
YoY Change	17.1%
% of Gross Profit		0.72%	0.74%
Operating Expenses	$2.932B	$2.761B	$2.754B
YoY Change	7.56%	7.69%	3.57%
Operating Profit		-$1.716B	-$1.789B
YoY Change		3.63%	10.6%
Interest Expense	-$44.80M	$36.84M	$29.35M
YoY Change	-6.47%	-14.46%	44.37%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$255.5M	$340.2M	$339.3M
YoY Change	-13.55%	18.28%	-3.94%
Income Tax	$72.40M	$112.6M	$107.1M
% Of Pretax Income	28.34%	33.09%	31.57%
Net Earnings	$1.217B	$227.6M	$232.2M
YoY Change	539.97%	14.53%	-1.66%
Net Earnings / Revenue	37.65%	7.24%	7.42%
Basic Earnings Per Share	$18.89	$3.53	$3.60
Diluted Earnings Per Share	$18.49	$3.47	$3.54
COMMON SHARES
Basic Shares Outstanding	64.40M shares	64.49M shares	64.45M shares
Diluted Shares Outstanding		65.65M shares	65.61M shares

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.304B	$1.205B	$1.123B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill	$7.000M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments	$47.15B	$45.22B	$45.19B
YoY Change	15.47%	6.48%	7.4%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$60.51B	$58.69B	$58.14B
YoY Change	13.97%	7.04%	7.91%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$3.572B	$3.585B	$3.612B
YoY Change	-9.09%	-1.4%	-1.28%
Other Long-Term Liabilities	$17.33B	$17.43B	$17.52B
YoY Change	15.0%	12.18%	15.39%
Total Long-Term Liabilities	$20.90B	$21.02B	$21.13B
YoY Change	10.02%	9.6%	12.15%
TOTAL LIABILITIES
Total Short-Term Liabilities
Total Long-Term Liabilities	$20.90B	$21.02B	$21.13B
Total Liabilities	$50.95B	$50.60B	$50.17B
YoY Change	10.74%	8.02%	8.36%
SHAREHOLDERS EQUITY
Retained Earnings	$6.736B	$5.713B	$5.524B
YoY Change	29.57%	13.36%	13.4%
Common Stock	$1.872B	$1.866B	$1.861B
YoY Change	1.21%	1.26%	1.36%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.102B	$1.108B	$1.085B
YoY Change	0.66%	0.57%	-2.35%
Treasury Stock Shares	14.69M shares	14.77M shares	14.65M shares
Shareholders Equity	$9.570B	$8.097B	$7.971B
YoY Change
Total Liabilities & Shareholders Equity	$60.51B	$58.69B	$58.14B
YoY Change	13.97%	7.04%	7.91%

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$1.217B	$227.6M	$232.2M
YoY Change	539.97%	14.53%	-1.66%
Depreciation, Depletion And Amortization	$31.50M	$7.500M	$7.100M
YoY Change	17.1%
Cash From Operating Activities	$877.8M	$448.5M	$238.6M
YoY Change	96.9%	5.41%	5.67%
INVESTING ACTIVITIES
Capital Expenditures	-$11.00M	-$33.20M
YoY Change	-75.34%
Acquisitions
YoY Change
Other Investing Activities	-$540.3M	-$133.4M	-$795.6M
YoY Change	1.24%	-29.49%	-41.01%
Cash From Investing Activities	-$551.3M	-$166.6M	-$778.7M
YoY Change	-4.67%	-11.95%	-42.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-236.6M	-210.2M	470.0M
YoY Change	21409.09%	-303.09%	-28.31%
NET CHANGE
Cash From Operating Activities	877.8M	448.5M	238.6M
Cash From Investing Activities	-551.3M	-166.6M	-778.7M
Cash From Financing Activities	-236.6M	-210.2M	470.0M
Net Change In Cash	89.90M	71.70M	-70.10M
YoY Change	-167.29%	-78.9%	-85.0%
FREE CASH FLOW
Cash From Operating Activities	$877.8M	$448.5M	$238.6M
Capital Expenditures	-$11.00M	-$33.20M
Free Cash Flow	$888.8M	$481.7M
YoY Change	81.24%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000898174
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	62839877	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2018	dei	Entity Registrant Name EntityRegistrantName	REINSURANCE GROUP OF AMERICA INC
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2018Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	19884691000	USD
CY2017	rga	Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships AccumulatedAmortizationOfValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships	71500000	USD
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CY2018	rga	Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships AmortizationOfValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships	8300000	USD
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CY2017	rga	Foreign Currency Translation Adjustment On Valuation Allowance ForeignCurrencyTranslationAdjustmentOnValuationAllowance	10600000	USD
CY2018	rga	Foreign Currency Translation Adjustment On Valuation Allowance ForeignCurrencyTranslationAdjustmentOnValuationAllowance	-12800000	USD
CY2018Q4	rga	Funds Held Under Reinsurance Agreements Asset Specific Client FundsHeldUnderReinsuranceAgreementsAssetSpecificClient	3800000000	USD
CY2017Q4	rga	Funds Withheld At Interest Percent Of Invested Assets FundsWithheldAtInterestPercentOfInvestedAssets	0.118
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CY2018	rga	Future Dividend Payment Restricted To Such Percent Of Surplus To Policy Holders FutureDividendPaymentRestrictedToSuchPercentOfSurplusToPolicyHolders	0.1
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CY2016	rga	Gilti Netof Credits GiltiNetofCredits	0	USD
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CY2018	rga	Maximum Capital Lease Obligations As Offset Against Industrial Bonds MaximumCapitalLeaseObligationsAsOffsetAgainstIndustrialBonds	150000000	USD
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CY2018	rga	Number Of Preceeding Months To Accumulate Dividend Paid For Approval NumberOfPreceedingMonthsToAccumulateDividendPaidForApproval	P12M
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CY2016	rga	Other Impairment Losses And Change In Mortgage Loan Provision OtherImpairmentLossesAndChangeInMortgageLoanProvision	11006000	USD
CY2017	rga	Other Impairment Losses And Change In Mortgage Loan Provision OtherImpairmentLossesAndChangeInMortgageLoanProvision	9497000	USD
CY2018	rga	Other Impairment Losses And Change In Mortgage Loan Provision OtherImpairmentLossesAndChangeInMortgageLoanProvision	11919000	USD
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CY2017Q4	rga	Percentage Of Fixed Maturity Securities Classified As Level3 PercentageOfFixedMaturitySecuritiesClassifiedAsLevel3	0.059
CY2018Q4	rga	Percentage Of Fixed Maturity Securities Classified As Level3 PercentageOfFixedMaturitySecuritiesClassifiedAsLevel3	0.050
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CY2018	rga	Performance Contingent Unit Share Payout PerformanceContingentUnitSharePayout	1.07	shares
CY2018	rga	Performance Contingent Units Measurement Period PerformanceContingentUnitsMeasurementPeriod	P3Y
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CY2018	rga	Policy Acquisition Costs And Other Insurance Expenses PolicyAcquisitionCostsAndOtherInsuranceExpenses	1322520000	USD
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CY2018Q4	rga	Policy Loans Percent Of Invested Assets PolicyLoansPercentOfInvestedAssets	0.025
CY2017Q4	rga	Prescribed Practice Letters Of Credit PrescribedPracticeLettersOfCredit	960100000	USD
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CY2017Q4	rga	Prescribed Practice Surplus Note PrescribedPracticeSurplusNote	726531000	USD
CY2018Q4	rga	Prescribed Practice Surplus Note PrescribedPracticeSurplusNote	624266000	USD
CY2016	rga	Proceeds From Sale Of Available For Sale Equity Securities Sold At Loss ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss	126100000	USD
CY2017	rga	Proceeds From Sale Of Available For Sale Equity Securities Sold At Loss ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss	177700000	USD
CY2018	rga	Proceeds From Sale Of Available For Sale Equity Securities Sold At Loss ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss	32800000	USD
CY2016	rga	Proceeds From Sale Of Available For Sale Securities Sold At Loss ProceedsFromSaleOfAvailableForSaleSecuritiesSoldAtLoss	1055500000	USD
CY2017	rga	Proceeds From Sale Of Available For Sale Securities Sold At Loss ProceedsFromSaleOfAvailableForSaleSecuritiesSoldAtLoss	2550100000	USD
CY2018	rga	Proceeds From Sale Of Available For Sale Securities Sold At Loss ProceedsFromSaleOfAvailableForSaleSecuritiesSoldAtLoss	5784600000	USD
CY2017	rga	Reclassification With Other Deferred Tax Assets Impacton Valuation Allowance ReclassificationWithOtherDeferredTaxAssetsImpactonValuationAllowance	-5600000	USD
CY2017Q4	rga	Reinsurance Claims Recoverables ReinsuranceClaimsRecoverables	243800000	USD
CY2018Q4	rga	Reinsurance Claims Recoverables ReinsuranceClaimsRecoverables	242800000	USD
CY2018	rga	Rga Reinsurance Max Dividend Payments Without Approval RgaReinsuranceMaxDividendPaymentsWithoutApproval	653900000	USD
CY2017Q4	rga	Statutory Financial Reinsurance StatutoryFinancialReinsurance	16200000000	USD
CY2018Q4	rga	Statutory Financial Reinsurance StatutoryFinancialReinsurance	18100000000	USD
CY2017Q4	rga	Statutory Reserves Related To Financial Requirements StatutoryReservesRelatedToFinancialRequirements	2901100000	USD
CY2018Q4	rga	Statutory Reserves Related To Financial Requirements StatutoryReservesRelatedToFinancialRequirements	3421000000	USD
CY2018	rga	Subsidiary Net Operating Loss SubsidiaryNetOperatingLoss	24500000	USD
CY2017Q4	rga	Surplus Deficit Naic Sap SurplusDeficitNaicSap	-233569000	USD
CY2018Q4	rga	Surplus Deficit Naic Sap SurplusDeficitNaicSap	-351834000	USD
CY2017Q4	rga	Total Deferred Income Tax Liabilities TotalDeferredIncomeTaxLiabilities	2884709000	USD
CY2018Q4	rga	Total Deferred Income Tax Liabilities TotalDeferredIncomeTaxLiabilities	2428437000	USD
CY2016	rga	Treasury Stock Value Acquired Cost Method Repurchase Agreement TreasuryStockValueAcquiredCostMethodRepurchaseAgreement	116500000	USD
CY2017Q4	rga	Undrawn Outstanding Letters Of Credit Between Subsidiaries UndrawnOutstandingLettersOfCreditBetweenSubsidiaries	1492200000	USD
CY2018Q4	rga	Undrawn Outstanding Letters Of Credit Between Subsidiaries UndrawnOutstandingLettersOfCreditBetweenSubsidiaries	1356900000	USD
CY2017Q4	rga	Undrawn Outstanding Letters Of Credit In Favor Of Third Parties UndrawnOutstandingLettersOfCreditInFavorOfThirdParties	120100000	USD
CY2018Q4	rga	Undrawn Outstanding Letters Of Credit In Favor Of Third Parties UndrawnOutstandingLettersOfCreditInFavorOfThirdParties	105600000	USD
CY2016	rga	Unrecognized Tax Benefits Payment On Deposit UnrecognizedTaxBenefitsPaymentOnDeposit	0	USD
CY2017	rga	Unrecognized Tax Benefits Payment On Deposit UnrecognizedTaxBenefitsPaymentOnDeposit	0	USD
CY2018	rga	Unrecognized Tax Benefits Payment On Deposit UnrecognizedTaxBenefitsPaymentOnDeposit	185000	USD
CY2018Q4	rga	Valuation Allowance Related To Tax Cuts And Jobs Act Of2017 ValuationAllowanceRelatedToTaxCutsAndJobsActOf2017	58900000	USD
CY2017Q4	rga	Values Of Business Acquired Distribution Agreements And Customer Relationships ValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships	49200000	USD
CY2018Q4	rga	Values Of Business Acquired Distribution Agreements And Customer Relationships ValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships	40800000	USD
CY2016Q4	srt	Life Insurance In Force Assumed LifeInsuranceInForceAssumed	3062525000000	USD
CY2017Q4	srt	Life Insurance In Force Assumed LifeInsuranceInForceAssumed	3297275000000	USD
CY2018Q4	srt	Life Insurance In Force Assumed LifeInsuranceInForceAssumed	3329181000000	USD
CY2016Q4	srt	Life Insurance In Force Ceded LifeInsuranceInForceCeded	214727000000	USD
CY2017Q4	srt	Life Insurance In Force Ceded LifeInsuranceInForceCeded	205529000000	USD
CY2018Q4	srt	Life Insurance In Force Ceded LifeInsuranceInForceCeded	186172000000	USD
CY2016Q4	srt	Life Insurance In Force Gross LifeInsuranceInForceGross	1576000000	USD
CY2017Q4	srt	Life Insurance In Force Gross LifeInsuranceInForceGross	1462000000	USD
CY2018Q4	srt	Life Insurance In Force Gross LifeInsuranceInForceGross	1363000000	USD
CY2016Q4	srt	Life Insurance In Force Net LifeInsuranceInForceNet	2849374000000	USD
CY2017Q4	srt	Life Insurance In Force Net LifeInsuranceInForceNet	3093208000000	USD
CY2018Q4	srt	Life Insurance In Force Net LifeInsuranceInForceNet	3144372000000	USD
CY2016Q4	srt	Life Insurance In Force Percentage Assumed To Net LifeInsuranceInForcePercentageAssumedToNet	1.075
CY2017Q4	srt	Life Insurance In Force Percentage Assumed To Net LifeInsuranceInForcePercentageAssumedToNet	1.066
CY2018Q4	srt	Life Insurance In Force Percentage Assumed To Net LifeInsuranceInForcePercentageAssumedToNet	1.059
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CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	105382000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	57378000	USD
CY2017Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	392721000	USD
CY2018Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	427893000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	79400000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	97000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	708284000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1139329000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2063631000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	636763000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1870906000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1898652000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	33100000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	22300000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	30100000	USD
CY2015Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	6813000	USD
CY2016Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	7685000	USD
CY2017Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	9384000	USD
CY2018Q4	us-gaap	Allowance For Loan And Lease Losses Real Estate AllowanceForLoanAndLeaseLossesRealEstate	11286000	USD
CY2016	us-gaap	Amortization Of Value Of Business Acquired Voba AmortizationOfValueOfBusinessAcquiredVOBA	500000	USD
CY2017	us-gaap	Amortization Of Value Of Business Acquired Voba AmortizationOfValueOfBusinessAcquiredVOBA	300000	USD
CY2018	us-gaap	Amortization Of Value Of Business Acquired Voba AmortizationOfValueOfBusinessAcquiredVOBA	400000	USD
CY2017Q4	us-gaap	Assets Assets	60514818000	USD
CY2018Q4	us-gaap	Assets Assets	64535245000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	39177513000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	41201556000	USD
CY2017Q4	us-gaap	Assets Held In Trust AssetsHeldInTrust	841500000	USD
CY2018Q4	us-gaap	Assets Held In Trust AssetsHeldInTrust	767900000	USD
CY2016	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	10049587000	USD
CY2017	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	10642462000	USD
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	11341284000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	35281412000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	38882168000	USD
CY2017Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	102841000	USD
CY2018Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	107721000	USD
CY2016	us-gaap	Available For Sale Equity Securities Gross Unrealized Gain AvailableForSaleEquitySecuritiesGrossUnrealizedGain	9198000	USD
CY2017	us-gaap	Available For Sale Equity Securities Gross Unrealized Gain AvailableForSaleEquitySecuritiesGrossUnrealizedGain	23000	USD
CY2018	us-gaap	Available For Sale Equity Securities Gross Unrealized Gain AvailableForSaleEquitySecuritiesGrossUnrealizedGain	4429000	USD
CY2016	us-gaap	Available For Sale Equity Securities Gross Unrealized Loss AvailableForSaleEquitySecuritiesGrossUnrealizedLoss	2871000	USD
CY2017	us-gaap	Available For Sale Equity Securities Gross Unrealized Loss AvailableForSaleEquitySecuritiesGrossUnrealizedLoss	4351000	USD
CY2018	us-gaap	Available For Sale Equity Securities Gross Unrealized Loss AvailableForSaleEquitySecuritiesGrossUnrealizedLoss	1937000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	23210968000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	23982119000	USD
CY2017Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	21966803000	USD
CY2018Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	24006407000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	9060972000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	9149497000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	8760200000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	8851307000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	14403523000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	15363152000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1185868000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1190931000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	5471605000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	5437459000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	38150820000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	39992346000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	145172000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	110546000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	65211000	USD
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CY2018	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	748490000	USD
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CY2017	us-gaap	Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	37328000	USD
CY2018	us-gaap	Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	158870000	USD
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CY2017Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2789961000	USD
CY2017Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2805148000	USD
CY2017Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2976949000	USD
CY2017	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	11372954000	USD
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CY2018Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2948620000	USD
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CY2018Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	3140572000	USD
CY2018	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	12029844000	USD
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CY2018Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	69791000	USD
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CY2017	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	35700000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	26900000	USD
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CY2018Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	150400000	USD
CY2016	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
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CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1303524000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1889733000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	356788000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	485167000	USD
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CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	102806000	USD
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CY2017	us-gaap	Ceded Premiums Earned CededPremiumsEarned	862903000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	860034000	USD
CY2016	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	-1700000	USD
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CY2017Q4	us-gaap	Collateralized Financings CollateralizedFinancings	783938000	USD
CY2018Q4	us-gaap	Collateralized Financings CollateralizedFinancings	681961000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2017Q4	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	7572000	USD
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CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	48726000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	167938000	USD
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CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	19849000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	26598000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	7710000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	293777000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-847304000	USD
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CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2198309000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1798800000	USD
CY2016	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	341115000	USD
CY2017	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	432474000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	437696000	USD
CY2016	us-gaap	Deferred Policy Acquisition Cost Amortization Expense Other DeferredPolicyAcquisitionCostAmortizationExpenseOther	-40077000	USD
CY2017	us-gaap	Deferred Policy Acquisition Cost Amortization Expense Other DeferredPolicyAcquisitionCostAmortizationExpenseOther	-70392000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense Other DeferredPolicyAcquisitionCostAmortizationExpenseOther	14658000	USD
CY2016	us-gaap	Deferred Policy Acquisition Cost Foreign Currency Translation Gain Loss DeferredPolicyAcquisitionCostForeignCurrencyTranslationGainLoss	-19332000	USD
CY2017	us-gaap	Deferred Policy Acquisition Cost Foreign Currency Translation Gain Loss DeferredPolicyAcquisitionCostForeignCurrencyTranslationGainLoss	63835000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Foreign Currency Translation Gain Loss DeferredPolicyAcquisitionCostForeignCurrencyTranslationGainLoss	-53367000	USD
CY2016	us-gaap	Deferred Policy Acquisition Cost Unrealized Investment Gain Loss DeferredPolicyAcquisitionCostUnrealizedInvestmentGainLoss	-3541000	USD
CY2017	us-gaap	Deferred Policy Acquisition Cost Unrealized Investment Gain Loss DeferredPolicyAcquisitionCostUnrealizedInvestmentGainLoss	-8220000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Unrealized Investment Gain Loss DeferredPolicyAcquisitionCostUnrealizedInvestmentGainLoss	26608000	USD
CY2015Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	3392437000	USD
CY2016Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	3338605000	USD
CY2017Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	3239824000	USD
CY2018Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	3397770000	USD
CY2016	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	350233000	USD
CY2017	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	348470000	USD
CY2018	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	607743000	USD
CY2018	us-gaap	Deferred Policy Acquisition Costs Disclosure DeferredPolicyAcquisitionCostsDisclosure	Some reinsurance agreements involve reimbursing the ceding company for allowances and commissions in excess of first-year premiums. These amounts represent acquisition costs and are capitalized to the extent deemed recoverable from the future premiums and amortized against future profits of the business.
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	946783000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	860266000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	719899000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	679156000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	535374000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	405958000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	33499000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	49519000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	152000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	27800000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	80905000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	86092000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	226884000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	181110000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2164810000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1749281000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	627378000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	843328000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	25433000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Unrealized Currency Transaction Gains DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains	33803000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Unrealized Currency Transaction Gains DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains	52928000	USD
CY2017Q4	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries	1442900000	USD
CY2018Q4	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries	1364100000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	172143000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	178604000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	103236000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	102561000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-68907000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-76043000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	169705000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	174400000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	9900000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	14200000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	15300000	USD
CY2016	us-gaap	Depreciation Depreciation	16600000	USD
CY2017	us-gaap	Depreciation Depreciation	17200000	USD
CY2018	us-gaap	Depreciation Depreciation	18300000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	557055000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	705964000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	574362000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	26853000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	52902000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	45127000	USD
CY2017Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	20258000	USD
CY2018Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	18581000	USD
CY2017Q4	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	862000	USD
CY2018Q4	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	0	USD
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	178272000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	228488000	USD
CY2017	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P3Y5M
CY2018	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P4Y8M
CY2017Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	185900000	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	235611000	USD
CY2017Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	22221000	USD
CY2018Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	24080000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	320724000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	356666000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	-8490000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	-7123000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	1058727000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	990895000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	-56136000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	-68007000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	24241000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	27449000	USD
CY2017Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	20258000	USD
CY2018Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	18581000	USD
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.76
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.75
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.25
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	10.79
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.22
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.54
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.47
CY2017Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	58156000	USD
CY2018Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	71376000	USD
CY2016	us-gaap	Direct Premiums Earned DirectPremiumsEarned	57562000	USD
CY2017	us-gaap	Direct Premiums Earned DirectPremiumsEarned	61571000	USD
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	62526000	USD
CY2016	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	100371000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	117291000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	140110000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	10.91
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.26
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.60
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.53
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	18.89
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	28.28
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.55
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.19
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	18.49
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	27.71
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.13
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.68
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.72
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.00
CY2016	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-19938000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	52693000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-36387000	USD
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.328
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.594
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.154
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	24700000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y5M
CY2006Q2	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	112800000	USD
CY2017Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	60346000	USD
CY2018Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	82197000	USD
CY2017Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	100152000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	82197000	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	162000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	162000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2017Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	428344000	USD
CY2018Q4	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	554589000	USD
CY2017Q4	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	1038469000	USD
CY2018Q4	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	972314000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	9384000	USD

CY2018

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CY2018

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Current Fiscal Year End Date

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--12-31

CY2018

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Document Fiscal Period Focus

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FY

CY2018

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Document Fiscal Year Focus

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2018

CY2018

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Document Period End Date

DocumentPeriodEndDate

2018-12-31

CY2018

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Document Type

DocumentType

10-K

CY2018

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Entity Central Index Key

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CY2019Q1

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Entity Common Stock Shares Outstanding

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62839877

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CY2018

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Entity Current Reporting Status

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Yes

CY2018

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Entity Emerging Growth Company

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false

CY2018

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Entity Filer Category

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Large Accelerated Filer

CY2018Q2

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Entity Public Float

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8500000000

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CY2018

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Entity Registrant Name

EntityRegistrantName

REINSURANCE GROUP OF AMERICA INC

CY2018

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Entity Shell Company

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false

CY2018

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Entity Small Business

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false

CY2018

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Entity Voluntary Filers

EntityVoluntaryFilers

No

CY2018

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Entity Well Known Seasoned Issuer

EntityWellKnownSeasonedIssuer

Yes

CY2017Q4

invest

Derivative Notional Amount

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15904127000

USD

CY2018Q4

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Derivative Notional Amount

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19884691000

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CY2017

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Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships

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71500000

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CY2018

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Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships

AccumulatedAmortizationOfValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships

79800000

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CY2016

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Accumulated Other Comprehensive Income Loss Change In Component During Period

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577265000

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CY2017

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Accumulated Other Comprehensive Income Loss Change In Component During Period

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1004927000

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CY2018

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Accumulated Other Comprehensive Income Loss Change In Component During Period

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-1712435000

USD

CY2016

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Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships

AmortizationOfValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships

9000000

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CY2017

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Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships

AmortizationOfValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships

8700000

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CY2018

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Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships

AmortizationOfValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships

8300000

USD

CY2017

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Amount Held In Debt Service Coverage Account

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39700000

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CY2018

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Amount Held In Debt Service Coverage Account

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57100000

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CY2017Q4

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Claims Recoverable From Retrocessionaires Past Due

ClaimsRecoverableFromRetrocessionairesPastDue

1900000

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CY2018Q4

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Claims Recoverable From Retrocessionaires Past Due

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17400000

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CY2016

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Collateral Financing Expense

CollateralFinancingExpense

25827000

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CY2017

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Collateral Financing Expense

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28636000

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CY2018

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Collateral Financing Expense

CollateralFinancingExpense

29699000

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CY2018

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Collateral Obtained Percent Of Fair Value Reverse Repurchase Agreements

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1.00

CY2017Q4

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Cumulative Foreign Currency Translation Gain Loss Recorded In Accumulated Other Comprehensive Income Loss For Net Investment In Foreign Operations Hedges

CumulativeForeignCurrencyTranslationGainLossRecordedInAccumulatedOtherComprehensiveIncomeLossForNetInvestmentInForeignOperationsHedges

113700000

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CY2018Q4

rga

Cumulative Foreign Currency Translation Gain Loss Recorded In Accumulated Other Comprehensive Income Loss For Net Investment In Foreign Operations Hedges

CumulativeForeignCurrencyTranslationGainLossRecordedInAccumulatedOtherComprehensiveIncomeLossForNetInvestmentInForeignOperationsHedges

201000000

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CY2016

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Current Federal Tax Expense Benefit Relating To Us Tax Reform

CurrentFederalTaxExpenseBenefitRelatingToUSTaxReform

0

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CY2017

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Current Federal Tax Expense Benefit Relating To Us Tax Reform

CurrentFederalTaxExpenseBenefitRelatingToUSTaxReform

0

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CY2018

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Current Federal Tax Expense Benefit Relating To Us Tax Reform

CurrentFederalTaxExpenseBenefitRelatingToUSTaxReform

-68080000

USD

CY2016

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Deferred Federal Income Tax Expense Benefit Related To Us Tax Reform

DeferredFederalIncomeTaxExpenseBenefitRelatedToUSTaxReform

0

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CY2017

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Deferred Federal Income Tax Expense Benefit Related To Us Tax Reform

DeferredFederalIncomeTaxExpenseBenefitRelatedToUSTaxReform

-1033755000

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CY2018

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Deferred Federal Income Tax Expense Benefit Related To Us Tax Reform

DeferredFederalIncomeTaxExpenseBenefitRelatedToUSTaxReform

5907000

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CY2017Q4

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Deferred Tax Assets Cash And Invested Assets

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557000

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CY2018Q4

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Deferred Tax Assets Cash And Invested Assets

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28398000

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CY2017Q4

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Deferred Tax Assets Deferred Acquisition Costs Capitalized For Financial Reporting

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102143000

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CY2018Q4

rga

Deferred Tax Assets Deferred Acquisition Costs Capitalized For Financial Reporting

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32897000

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CY2017Q4

rga

Deferred Tax Assets Deferred Acquisition Costs Capitalized For Tax

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88531000

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CY2018Q4

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Deferred Tax Assets Deferred Acquisition Costs Capitalized For Tax

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124707000

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CY2018Q4

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Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

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109597000

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CY2017Q4

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Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives

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1014228000

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CY2018Q4

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Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives

FairValueMeasuredOnRecurringBasisGuaranteedInterestContractsEmbeddedDerivatives

944865000

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CY2017Q4

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Deferred Tax Assets Investment Income

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43230000

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CY2018Q4

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Deferred Tax Assets Investment Income

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80200000

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CY2017Q4

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Deferred Tax Assets Reinsurance Transactions

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96043000

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CY2018Q4

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Deferred Tax Assets Reinsurance Transactions

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102014000

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CY2017Q4

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Deferred Tax Liabilities Cash And Invested Assets

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674569000

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Deferred Tax Liabilities Cash And Invested Assets

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345836000

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Deferred Tax Liabilities Investment Income

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1858000

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CY2018Q4

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Deferred Tax Liabilities Investment Income

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9493000

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CY2017Q4

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Deferred Tax Liabilities Reinsurance Transactions

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1547101000

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CY2018Q4

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Deferred Tax Liabilities Reinsurance Transactions

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1151419000

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CY2017Q4

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Derivative Fair Value Of Free Standing Derivative Asset

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198530000

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CY2018Q4

rga

Derivative Fair Value Of Free Standing Derivative Asset

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247069000

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CY2017Q4

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Derivative Fair Value Of Free Standing Derivative Liability

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44499000

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CY2018Q4

rga

Derivative Fair Value Of Free Standing Derivative Liability

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46030000

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CY2016

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Derivatives And Other Investments Net

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39527000

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CY2017

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Derivatives And Other Investments Net

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152328000

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CY2018

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Derivatives And Other Investments Net

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-15324000

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CY2017Q4

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Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

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122194000

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CY2017Q4

rga

Fair Value Measured On Recurring Basis Short Term Investments

FairValueMeasuredOnRecurringBasisShortTermInvestments

50746000

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CY2018Q4

rga

Fair Value Measured On Recurring Basis Short Term Investments

FairValueMeasuredOnRecurringBasisShortTermInvestments

105991000

USD

CY2017

rga

Foreign Currency Translation Adjustment On Valuation Allowance

ForeignCurrencyTranslationAdjustmentOnValuationAllowance

10600000

USD

CY2018

rga

Foreign Currency Translation Adjustment On Valuation Allowance

ForeignCurrencyTranslationAdjustmentOnValuationAllowance

-12800000

USD

CY2018Q4

rga

Funds Held Under Reinsurance Agreements Asset Specific Client

FundsHeldUnderReinsuranceAgreementsAssetSpecificClient

3800000000

USD

CY2017Q4

rga

Funds Withheld At Interest Percent Of Invested Assets

FundsWithheldAtInterestPercentOfInvestedAssets

0.118

CY2018Q4

rga

Funds Withheld At Interest Percent Of Invested Assets

FundsWithheldAtInterestPercentOfInvestedAssets

0.106

CY2018

rga

Future Dividend Payment Restricted To Such Percent Of Surplus To Policy Holders

FutureDividendPaymentRestrictedToSuchPercentOfSurplusToPolicyHolders

0.1

CY2016

rga

Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives

GainLossOnInvestmentsRelatedToChangeInFairValueOfDerivativesExcludingEmbeddedDerivatives

-28611000

USD

CY2017

rga

Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives

GainLossOnInvestmentsRelatedToChangeInFairValueOfDerivativesExcludingEmbeddedDerivatives

-42767000

USD

CY2018

rga

Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives

GainLossOnInvestmentsRelatedToChangeInFairValueOfDerivativesExcludingEmbeddedDerivatives

-96000

USD

CY2016

rga

Gilti Netof Credits

GiltiNetofCredits

0

USD

CY2017

rga

Gilti Netof Credits

GiltiNetofCredits

0

USD

CY2018

rga

Gilti Netof Credits

GiltiNetofCredits

-10400000

USD

CY2017Q4

rga

Impaired Financing Receivable Net Of Related Allowance

ImpairedFinancingReceivableNetOfRelatedAllowance

5858000

USD

CY2018Q4

rga

Impaired Financing Receivable Net Of Related Allowance

ImpairedFinancingReceivableNetOfRelatedAllowance

30635000

USD

CY2016

rga

Income Tax Reconciliation Change In Foreign Enacted Tax Rate

IncomeTaxReconciliationChangeInForeignEnactedTaxRate

0

USD

CY2017

rga

Income Tax Reconciliation Change In Foreign Enacted Tax Rate

IncomeTaxReconciliationChangeInForeignEnactedTaxRate

6065000

USD

CY2018

rga

Income Tax Reconciliation Change In Foreign Enacted Tax Rate

IncomeTaxReconciliationChangeInForeignEnactedTaxRate

-1008000

USD

CY2016

rga

Income Tax Reconciliation Foreign Income Tax Basis Differential

IncomeTaxReconciliationForeignIncomeTaxBasisDifferential

-17770000

USD

CY2017

rga

Income Tax Reconciliation Foreign Income Tax Basis Differential

IncomeTaxReconciliationForeignIncomeTaxBasisDifferential

-23324000

USD

CY2018

rga

Income Tax Reconciliation Foreign Income Tax Basis Differential

IncomeTaxReconciliationForeignIncomeTaxBasisDifferential

-23257000

USD

CY2016

rga

Income Tax Reconciliation Subpart F

IncomeTaxReconciliationSubpartF

1783000

USD

CY2017

rga

Income Tax Reconciliation Subpart F

IncomeTaxReconciliationSubpartF

1528000

USD

CY2018

rga

Income Tax Reconciliation Subpart F

IncomeTaxReconciliationSubpartF

583000

USD

CY2016

rga

Interest On Liability For Policy And Contract Claims

InterestOnLiabilityForPolicyAndContractClaims

18151000

USD

CY2017

rga

Interest On Liability For Policy And Contract Claims

InterestOnLiabilityForPolicyAndContractClaims

19443000

USD

CY2018

rga

Interest On Liability For Policy And Contract Claims

InterestOnLiabilityForPolicyAndContractClaims

24802000

USD

CY2015Q4

rga

Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfRecoverable

4572253000

USD

CY2016Q4

rga

Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfRecoverable

4785981000

USD

CY2017Q4

rga

Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfRecoverable

5440922000

USD

CY2018Q4

rga

Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetOfRecoverable

6152086000

USD

CY2016

rga

Liabilityfor Unpaid Claimsand Claims Adjustment Expense Other

LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseOther

-50567000

USD

CY2017

rga

Liabilityfor Unpaid Claimsand Claims Adjustment Expense Other

LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseOther

246581000

USD

CY2018

rga

Liabilityfor Unpaid Claimsand Claims Adjustment Expense Other

LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseOther

-174626000

USD

CY2018

rga

Maximum Capital Lease Obligations As Offset Against Industrial Bonds

MaximumCapitalLeaseObligationsAsOffsetAgainstIndustrialBonds

150000000

USD

CY2018Q4

rga

Maximum Life Insurance Retention Per Individual Life

MaximumLifeInsuranceRetentionPerIndividualLife

8000000

USD

CY2017Q4

rga

Mortgage Loan Percent Of Invested Assets

MortgageLoanPercentOfInvestedAssets

0.085

CY2018Q4

rga

Mortgage Loan Percent Of Invested Assets

MortgageLoanPercentOfInvestedAssets

0.091

CY2017Q4

rga

Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total

MortgageLoansOnRealEstateCommercialAndConsumerNetPercentageOfTotal

1.000

CY2018Q4

rga

Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total

MortgageLoansOnRealEstateCommercialAndConsumerNetPercentageOfTotal

1.000

CY2017Q4

rga

Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements

NetAmountAssetsLiabilitiesFromRepurchaseReverseRepurchaseAgreements

1100000

USD

CY2018Q4

rga

Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements

NetAmountAssetsLiabilitiesFromRepurchaseReverseRepurchaseAgreements

400000

USD

CY2017Q4

rga

Non Redeemable Preferred Stock Equity Method Investments Fair Value Disclosure

NonRedeemablePreferredStockEquityMethodInvestmentsFairValueDisclosure

39806000

USD

CY2018

rga

Number Of Preceeding Months To Accumulate Dividend Paid For Approval

NumberOfPreceedingMonthsToAccumulateDividendPaidForApproval

P12M

CY2016

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Before Reclassificationand Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapBeforeReclassificationandTax

-10234000

USD

CY2017

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Before Reclassificationand Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapBeforeReclassificationandTax

-47953000

USD

CY2018

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Before Reclassificationand Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapBeforeReclassificationandTax

87344000

USD

CY2016

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Net Of Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapNetOfTax

-6652000

USD

CY2017

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Net Of Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapNetOfTax

-31169000

USD

CY2018

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Net Of Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapNetOfTax

69002000

USD

CY2016

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapTax

3582000

USD

CY2017

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapTax

16784000

USD

CY2018

rga

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodForeignCurrencySwapTax

-18342000

USD

CY2016

rga

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Excluding Oci Bond Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodExcludingOCIBondTax

157929000

USD

CY2017

rga

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Excluding Oci Bond Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodExcludingOCIBondTax

306849000

USD

CY2018

rga

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Excluding Oci Bond Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodExcludingOCIBondTax

-367933000

USD

CY2016

rga

Other Impairment Losses And Change In Mortgage Loan Provision

OtherImpairmentLossesAndChangeInMortgageLoanProvision

11006000

USD

CY2017

rga

Other Impairment Losses And Change In Mortgage Loan Provision

OtherImpairmentLossesAndChangeInMortgageLoanProvision

9497000

USD

CY2018

rga

Other Impairment Losses And Change In Mortgage Loan Provision

OtherImpairmentLossesAndChangeInMortgageLoanProvision

11919000

USD

CY2017Q4

rga

Other Invested Assets Percent Of Invested Assets

OtherInvestedAssetsPercentOfInvestedAssets

0.029

CY2018Q4

rga

Other Invested Assets Percent Of Invested Assets

OtherInvestedAssetsPercentOfInvestedAssets

0.035

CY2017Q4

rga

Percentage Of Fixed Maturity Securities Classified As Level3

PercentageOfFixedMaturitySecuritiesClassifiedAsLevel3

0.059

CY2018Q4

rga

Percentage Of Fixed Maturity Securities Classified As Level3

PercentageOfFixedMaturitySecuritiesClassifiedAsLevel3

0.050

CY2017Q4

rga

Percentage Of Total Available For Sales Securities

PercentageOfTotalAvailableForSalesSecurities

1.000

CY2018Q4

rga

Percentage Of Total Available For Sales Securities

PercentageOfTotalAvailableForSalesSecurities

1.000

CY2017Q4

rga

Percentage Of Total Gross Unrealized Losses

PercentageOfTotalGrossUnrealizedLosses

1

CY2018Q4

rga

Percentage Of Total Gross Unrealized Losses

PercentageOfTotalGrossUnrealizedLosses

1

CY2017

rga

Performance Contingent Unit Share Payout

PerformanceContingentUnitSharePayout

0.75

shares

CY2018

rga

Performance Contingent Unit Share Payout

PerformanceContingentUnitSharePayout

1.07

shares

CY2018

rga

Performance Contingent Units Measurement Period

PerformanceContingentUnitsMeasurementPeriod

P3Y

CY2016

rga

Policy Acquisition Costs And Other Insurance Expenses

PolicyAcquisitionCostsAndOtherInsuranceExpenses

1310540000

USD

CY2017

rga

Policy Acquisition Costs And Other Insurance Expenses

PolicyAcquisitionCostsAndOtherInsuranceExpenses

1466646000

USD

CY2018

rga

Policy Acquisition Costs And Other Insurance Expenses

PolicyAcquisitionCostsAndOtherInsuranceExpenses

1322520000

USD

CY2017Q4

rga

Policy Loans Percent Of Invested Assets

PolicyLoansPercentOfInvestedAssets

0.026

CY2018Q4

rga

Policy Loans Percent Of Invested Assets

PolicyLoansPercentOfInvestedAssets

0.025

CY2017Q4

rga

Prescribed Practice Letters Of Credit

PrescribedPracticeLettersOfCredit

960100000

USD

CY2018Q4

rga

Prescribed Practice Letters Of Credit

PrescribedPracticeLettersOfCredit

976100000

USD

CY2017Q4

rga

Prescribed Practice Surplus Note

PrescribedPracticeSurplusNote

726531000

USD

CY2018Q4

rga

Prescribed Practice Surplus Note

PrescribedPracticeSurplusNote

624266000

USD

CY2016

rga

Proceeds From Sale Of Available For Sale Equity Securities Sold At Loss

ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss

126100000

USD

CY2017

rga

Proceeds From Sale Of Available For Sale Equity Securities Sold At Loss

ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss

177700000

USD

CY2018

rga

Proceeds From Sale Of Available For Sale Equity Securities Sold At Loss

ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss

32800000

USD

CY2016

rga

Proceeds From Sale Of Available For Sale Securities Sold At Loss

ProceedsFromSaleOfAvailableForSaleSecuritiesSoldAtLoss

1055500000

USD

CY2017

rga

Proceeds From Sale Of Available For Sale Securities Sold At Loss

ProceedsFromSaleOfAvailableForSaleSecuritiesSoldAtLoss

2550100000

USD

CY2018

rga

Proceeds From Sale Of Available For Sale Securities Sold At Loss

ProceedsFromSaleOfAvailableForSaleSecuritiesSoldAtLoss

5784600000

USD

CY2017

rga

Reclassification With Other Deferred Tax Assets Impacton Valuation Allowance

ReclassificationWithOtherDeferredTaxAssetsImpactonValuationAllowance

-5600000

USD

CY2017Q4

rga

Reinsurance Claims Recoverables

ReinsuranceClaimsRecoverables

243800000

USD

CY2018Q4

rga

Reinsurance Claims Recoverables

ReinsuranceClaimsRecoverables

242800000

USD

CY2018

rga

Rga Reinsurance Max Dividend Payments Without Approval

RgaReinsuranceMaxDividendPaymentsWithoutApproval

653900000

USD

CY2017Q4

rga

Statutory Financial Reinsurance

StatutoryFinancialReinsurance

16200000000

USD

CY2018Q4

rga

Statutory Financial Reinsurance

StatutoryFinancialReinsurance

18100000000

USD

CY2017Q4

rga

Statutory Reserves Related To Financial Requirements

StatutoryReservesRelatedToFinancialRequirements

2901100000

USD

CY2018Q4

rga

Statutory Reserves Related To Financial Requirements

StatutoryReservesRelatedToFinancialRequirements

3421000000

USD

CY2018

rga

Subsidiary Net Operating Loss

SubsidiaryNetOperatingLoss

24500000

USD

CY2017Q4

rga

Surplus Deficit Naic Sap

SurplusDeficitNaicSap

-233569000

USD

CY2018Q4

rga

Surplus Deficit Naic Sap

SurplusDeficitNaicSap

-351834000

USD

CY2017Q4

rga

Total Deferred Income Tax Liabilities

TotalDeferredIncomeTaxLiabilities

2884709000

USD

CY2018Q4

rga

Total Deferred Income Tax Liabilities

TotalDeferredIncomeTaxLiabilities

2428437000

USD

CY2016

rga

Treasury Stock Value Acquired Cost Method Repurchase Agreement

TreasuryStockValueAcquiredCostMethodRepurchaseAgreement

116500000

USD

CY2017Q4

rga

Undrawn Outstanding Letters Of Credit Between Subsidiaries

UndrawnOutstandingLettersOfCreditBetweenSubsidiaries

1492200000

USD

CY2018Q4

rga

Undrawn Outstanding Letters Of Credit Between Subsidiaries

UndrawnOutstandingLettersOfCreditBetweenSubsidiaries

1356900000

USD

CY2017Q4

rga

Undrawn Outstanding Letters Of Credit In Favor Of Third Parties

UndrawnOutstandingLettersOfCreditInFavorOfThirdParties

120100000

USD

CY2018Q4

rga

Undrawn Outstanding Letters Of Credit In Favor Of Third Parties

UndrawnOutstandingLettersOfCreditInFavorOfThirdParties

105600000

USD

CY2016

rga

Unrecognized Tax Benefits Payment On Deposit

UnrecognizedTaxBenefitsPaymentOnDeposit

0

USD

CY2017

rga

Unrecognized Tax Benefits Payment On Deposit

UnrecognizedTaxBenefitsPaymentOnDeposit

0

USD

CY2018

rga

Unrecognized Tax Benefits Payment On Deposit

UnrecognizedTaxBenefitsPaymentOnDeposit

185000

USD

CY2018Q4

rga

Valuation Allowance Related To Tax Cuts And Jobs Act Of2017

ValuationAllowanceRelatedToTaxCutsAndJobsActOf2017

58900000

USD

CY2017Q4

rga

Values Of Business Acquired Distribution Agreements And Customer Relationships

ValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships

49200000

USD

CY2018Q4

rga

Values Of Business Acquired Distribution Agreements And Customer Relationships

ValuesOfBusinessAcquiredDistributionAgreementsAndCustomerRelationships

40800000

USD

CY2016Q4

srt

Life Insurance In Force Assumed

LifeInsuranceInForceAssumed

3062525000000

USD

CY2017Q4

srt

Life Insurance In Force Assumed

LifeInsuranceInForceAssumed

3297275000000

USD

CY2018Q4

srt

Life Insurance In Force Assumed

LifeInsuranceInForceAssumed

3329181000000

USD

CY2016Q4

srt

Life Insurance In Force Ceded

LifeInsuranceInForceCeded

214727000000

USD

CY2017Q4

srt

Life Insurance In Force Ceded

LifeInsuranceInForceCeded

205529000000

USD

CY2018Q4

srt

Life Insurance In Force Ceded

LifeInsuranceInForceCeded

186172000000

USD

CY2016Q4

srt

Life Insurance In Force Gross

LifeInsuranceInForceGross

1576000000

USD

CY2017Q4

srt

Life Insurance In Force Gross

LifeInsuranceInForceGross

1462000000

USD

CY2018Q4

srt

Life Insurance In Force Gross

LifeInsuranceInForceGross

1363000000

USD

CY2016Q4

srt

Life Insurance In Force Net

LifeInsuranceInForceNet

2849374000000

USD

CY2017Q4

srt

Life Insurance In Force Net

LifeInsuranceInForceNet

3093208000000

USD

CY2018Q4

srt

Life Insurance In Force Net

LifeInsuranceInForceNet

3144372000000

USD

CY2016Q4

srt

Life Insurance In Force Percentage Assumed To Net

LifeInsuranceInForcePercentageAssumedToNet

1.075

CY2017Q4

srt

Life Insurance In Force Percentage Assumed To Net

LifeInsuranceInForcePercentageAssumedToNet

1.066

CY2018Q4

srt

Life Insurance In Force Percentage Assumed To Net

LifeInsuranceInForcePercentageAssumedToNet

1.059

CY2016

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

93952000

USD

CY2017

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

105382000

USD

CY2018

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

57378000

USD

CY2017Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

392721000

USD

CY2018Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

427893000

USD

CY2017Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

79400000

USD

CY2018Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

97000000

USD

CY2015Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

708284000

USD

CY2016Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

1139329000

USD

CY2017Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

2063631000

USD

CY2018Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

636763000

USD

CY2017Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

1870906000

USD

CY2018Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

1898652000

USD

CY2016

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

33100000

USD

CY2017

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

22300000

USD

CY2018

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

30100000

USD

CY2015Q4

us-gaap

Allowance For Loan And Lease Losses Real Estate

AllowanceForLoanAndLeaseLossesRealEstate

6813000

USD

CY2016Q4

us-gaap

Allowance For Loan And Lease Losses Real Estate

AllowanceForLoanAndLeaseLossesRealEstate

7685000

USD

CY2017Q4

us-gaap

Allowance For Loan And Lease Losses Real Estate

AllowanceForLoanAndLeaseLossesRealEstate

9384000

USD

CY2018Q4

us-gaap

Allowance For Loan And Lease Losses Real Estate

AllowanceForLoanAndLeaseLossesRealEstate

11286000

USD

CY2016

us-gaap

Amortization Of Value Of Business Acquired Voba

AmortizationOfValueOfBusinessAcquiredVOBA

500000

USD

CY2017

us-gaap

Amortization Of Value Of Business Acquired Voba

AmortizationOfValueOfBusinessAcquiredVOBA

300000

USD

CY2018

us-gaap

Amortization Of Value Of Business Acquired Voba

AmortizationOfValueOfBusinessAcquiredVOBA

400000

USD

CY2017Q4

us-gaap

Assets

60514818000

USD

CY2018Q4

us-gaap

Assets

64535245000

USD

CY2017Q4

us-gaap

Assets Fair Value Disclosure

AssetsFairValueDisclosure

39177513000

USD

CY2018Q4

us-gaap

Assets Fair Value Disclosure

AssetsFairValueDisclosure

41201556000

USD

CY2017Q4

us-gaap

Assets Held In Trust

AssetsHeldInTrust

841500000

USD

CY2018Q4

us-gaap

Assets Held In Trust

AssetsHeldInTrust

767900000

USD

CY2016

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

10049587000

USD

CY2017

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

10642462000

USD

CY2018

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

11341284000

USD

CY2017Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

35281412000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

38882168000

USD

CY2017Q4

us-gaap

Available For Sale Equity Securities Amortized Cost Basis

AvailableForSaleEquitySecuritiesAmortizedCostBasis

102841000

USD

CY2018Q4

us-gaap

Available For Sale Equity Securities Amortized Cost Basis

AvailableForSaleEquitySecuritiesAmortizedCostBasis

107721000

USD

CY2016

us-gaap

Available For Sale Equity Securities Gross Unrealized Gain

AvailableForSaleEquitySecuritiesGrossUnrealizedGain

9198000

USD

CY2017

us-gaap

Available For Sale Equity Securities Gross Unrealized Gain

AvailableForSaleEquitySecuritiesGrossUnrealizedGain

23000

USD

CY2018

us-gaap

Available For Sale Equity Securities Gross Unrealized Gain

AvailableForSaleEquitySecuritiesGrossUnrealizedGain

4429000

USD

CY2016

us-gaap

Available For Sale Equity Securities Gross Unrealized Loss

AvailableForSaleEquitySecuritiesGrossUnrealizedLoss

2871000

USD

CY2017

us-gaap

Available For Sale Equity Securities Gross Unrealized Loss

AvailableForSaleEquitySecuritiesGrossUnrealizedLoss

4351000

USD

CY2018

us-gaap

Available For Sale Equity Securities Gross Unrealized Loss

AvailableForSaleEquitySecuritiesGrossUnrealizedLoss

1937000

USD

CY2017Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

23210968000

USD

CY2018Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

23982119000

USD

CY2017Q4

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

21966803000

USD

CY2018Q4

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

24006407000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

9060972000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

9149497000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

8760200000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

8851307000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

14403523000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

15363152000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

1185868000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

1190931000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

5471605000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

5437459000

USD

CY2017Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

38150820000

USD

CY2018Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

39992346000

USD

CY2016

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

145172000

USD

CY2017

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

110546000

USD

CY2018

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

65211000

USD

CY2017

us-gaap

Available For Sale Securities Gross Unrealized Loss

AvailableForSaleSecuritiesGrossUnrealizedLoss

116993000

USD

CY2018

us-gaap

Available For Sale Securities Gross Unrealized Loss

AvailableForSaleSecuritiesGrossUnrealizedLoss

748490000

USD

CY2016

us-gaap

Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments

47094000

USD

CY2017

us-gaap

Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments

37328000

USD

CY2018

us-gaap

Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments

158870000

USD

CY2017Q4

us-gaap

Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1

AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

1116

position

CY2018Q4

us-gaap

Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1

AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

3109

position

CY2016

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

10477565000

USD

CY2017Q1

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2800896000

USD

CY2017Q2

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2789961000

USD

CY2017Q3

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2805148000

USD

CY2017Q4

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2976949000

USD

CY2017

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

11372954000

USD

CY2018Q1

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

3035782000

USD

CY2018Q2

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2948620000

USD

CY2018Q3

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2904870000

USD

CY2018Q4

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

3140572000

USD

CY2018

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

12029844000

USD

CY2016Q4

us-gaap

Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets

BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

0

USD

CY2017Q4

us-gaap

Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets

BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

0

USD

CY2018Q4

us-gaap

Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets

BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

69791000

USD

CY2016Q4

us-gaap

Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities

BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

0

USD

CY2017Q4

us-gaap

Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities

BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

0

USD

CY2018Q4

us-gaap

Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities

BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

38350000

USD

CY2016

us-gaap

Capitalized Computer Software Amortization1

CapitalizedComputerSoftwareAmortization1

10300000

USD

CY2017

us-gaap

Capitalized Computer Software Amortization1

CapitalizedComputerSoftwareAmortization1

35700000

USD

CY2018

us-gaap

Capitalized Computer Software Amortization1

CapitalizedComputerSoftwareAmortization1

26900000

USD

CY2017Q4

us-gaap

Capitalized Computer Software Net

CapitalizedComputerSoftwareNet

145500000

USD

CY2018Q4

us-gaap

Capitalized Computer Software Net

CapitalizedComputerSoftwareNet

150400000

USD

CY2016

us-gaap

Cash Acquired From Acquisition

CashAcquiredFromAcquisition

0

USD

CY2017

us-gaap

Cash Acquired From Acquisition

CashAcquiredFromAcquisition

0

USD

CY2018

us-gaap

Cash Acquired From Acquisition

CashAcquiredFromAcquisition

4988000

USD

CY2015Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

1525275000

USD

CY2016Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

1200718000

USD

CY2017Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

1303524000

USD

CY2018Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

1889733000

USD

CY2017Q4

us-gaap

Cash And Cash Equivalents Fair Value Disclosure

CashAndCashEquivalentsFairValueDisclosure

356788000

USD

CY2018Q4

us-gaap

Cash And Cash Equivalents Fair Value Disclosure

CashAndCashEquivalentsFairValueDisclosure

485167000

USD

CY2016

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-324557000

USD

CY2017

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

102806000

USD

CY2018

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

586209000

USD

CY2016

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

858278000

USD

CY2017

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

862903000

USD

CY2018

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

860034000

USD

CY2016

us-gaap

Change In Unrealized Gain Loss On Fair Value Hedging Instruments1

ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

-1700000

USD

CY2017

us-gaap

Change In Unrealized Gain Loss On Fair Value Hedging Instruments1

ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

9456000

USD

CY2018

us-gaap

Change In Unrealized Gain Loss On Fair Value Hedging Instruments1

ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

-11164000

USD

CY2016

us-gaap

Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1

ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

1700000

USD

CY2017

us-gaap

Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1

ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

-9456000

USD

CY2018

us-gaap

Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1

ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

12446000

USD

CY2017Q4

us-gaap

Collateralized Financings

CollateralizedFinancings

783938000

USD

CY2018Q4

us-gaap

Collateralized Financings

CollateralizedFinancings

681961000

USD

CY2017Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2018Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2016

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1560

CY2017

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1820

CY2018

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

2200

CY2017Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2018Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2017Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

140000000

shares

CY2018Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

140000000

shares

CY2017Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

79137758

shares

CY2018Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

79137758

shares

CY2017Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

64452095

shares

CY2018Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

62814368

shares

CY2017Q4

us-gaap

Common Stock Value

CommonStockValue

791000

USD

CY2018Q4

us-gaap

Common Stock Value

CommonStockValue

791000

USD

CY2016

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

1132488000

USD

CY2017

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

2590111000

USD

CY2018

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-708453000

USD

CY2017

us-gaap

Concentration Risk Percentage1

ConcentrationRiskPercentage1

1.000

CY2018

us-gaap

Concentration Risk Percentage1

ConcentrationRiskPercentage1

1.000

CY2017Q4

us-gaap

Credit Derivative Maximum Exposure Undiscounted

CreditDerivativeMaximumExposureUndiscounted

951300000

USD

CY2018Q4

us-gaap

Credit Derivative Maximum Exposure Undiscounted

CreditDerivativeMaximumExposureUndiscounted

1338300000

USD

CY2017Q4

us-gaap

Credit Risk Derivatives At Fair Value Net

CreditRiskDerivativesAtFairValueNet

7572000

USD

CY2018Q4

us-gaap

Credit Risk Derivatives At Fair Value Net

CreditRiskDerivativesAtFairValueNet

4837000

USD

CY2016

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

1020000

USD

CY2017

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

131108000

USD

CY2018

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

78431000

USD

CY2016

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

47706000

USD

CY2017

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

36830000

USD

CY2018

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

43120000

USD

CY2016

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

48726000

USD

CY2017

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

167938000

USD

CY2018

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

53471000

USD

CY2017Q4

us-gaap

Debt Instrument Carrying Amount

DebtInstrumentCarryingAmount

2808770000

USD

CY2018Q4

us-gaap

Debt Instrument Carrying Amount

DebtInstrumentCarryingAmount

2806524000

USD

CY2006Q2

us-gaap

Debt Instrument Face Amount

DebtInstrumentFaceAmount

850000000.0

USD

CY2017Q4

us-gaap

Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net

DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

20405000

USD

CY2018Q4

us-gaap

Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net

DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

18651000

USD

CY2018Q4

us-gaap

Debt Weighted Average Interest Rate

DebtWeightedAverageInterestRate

0.0524

CY2016

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

273928000

USD

CY2017

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

159853000

USD

CY2018

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

62890000

USD

CY2016

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

19849000

USD

CY2017

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

26598000

USD

CY2018

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

7710000

USD

CY2016

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

293777000

USD

CY2017

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-847304000

USD

CY2018

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

76507000

USD

CY2017Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

2198309000

USD

CY2018Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

1798800000

USD

CY2016

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

341115000

USD

CY2017

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

432474000

USD

CY2018

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

437696000

USD

CY2016

us-gaap

Deferred Policy Acquisition Cost Amortization Expense Other

DeferredPolicyAcquisitionCostAmortizationExpenseOther

-40077000

USD

CY2017

us-gaap

Deferred Policy Acquisition Cost Amortization Expense Other

DeferredPolicyAcquisitionCostAmortizationExpenseOther

-70392000

USD

CY2018

us-gaap

Deferred Policy Acquisition Cost Amortization Expense Other

DeferredPolicyAcquisitionCostAmortizationExpenseOther

14658000

USD

CY2016

us-gaap

Deferred Policy Acquisition Cost Foreign Currency Translation Gain Loss

DeferredPolicyAcquisitionCostForeignCurrencyTranslationGainLoss

-19332000

USD

CY2017

us-gaap

Deferred Policy Acquisition Cost Foreign Currency Translation Gain Loss

DeferredPolicyAcquisitionCostForeignCurrencyTranslationGainLoss

63835000

USD

CY2018

us-gaap

Deferred Policy Acquisition Cost Foreign Currency Translation Gain Loss

DeferredPolicyAcquisitionCostForeignCurrencyTranslationGainLoss

-53367000

USD

CY2016

us-gaap

Deferred Policy Acquisition Cost Unrealized Investment Gain Loss

DeferredPolicyAcquisitionCostUnrealizedInvestmentGainLoss

-3541000

USD

CY2017

us-gaap

Deferred Policy Acquisition Cost Unrealized Investment Gain Loss

DeferredPolicyAcquisitionCostUnrealizedInvestmentGainLoss

-8220000

USD

CY2018

us-gaap

Deferred Policy Acquisition Cost Unrealized Investment Gain Loss

DeferredPolicyAcquisitionCostUnrealizedInvestmentGainLoss

26608000

USD

CY2015Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

3392437000

USD

CY2016Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

3338605000

USD

CY2017Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

3239824000

USD

CY2018Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

3397770000

USD

CY2016

us-gaap

Deferred Policy Acquisition Costs Additions

DeferredPolicyAcquisitionCostsAdditions

350233000

USD

CY2017

us-gaap

Deferred Policy Acquisition Costs Additions

DeferredPolicyAcquisitionCostsAdditions

348470000

USD

CY2018

us-gaap

Deferred Policy Acquisition Costs Additions

DeferredPolicyAcquisitionCostsAdditions

607743000

USD

CY2018

us-gaap

Deferred Policy Acquisition Costs Disclosure

DeferredPolicyAcquisitionCostsDisclosure

Some reinsurance agreements involve reimbursing the ceding company for allowances and commissions in excess of first-year premiums. These amounts represent acquisition costs and are capitalized to the extent deemed recoverable from the future premiums and amortized against future profits of the business.

CY2017Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

946783000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

860266000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Net

DeferredTaxAssetsNet

719899000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Net

DeferredTaxAssetsNet

679156000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

535374000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

405958000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Other

DeferredTaxAssetsOther

33499000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Other

DeferredTaxAssetsOther

49519000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Tax Credit Carryforwards Foreign

DeferredTaxAssetsTaxCreditCarryforwardsForeign

152000000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Tax Credit Carryforwards Foreign

DeferredTaxAssetsTaxCreditCarryforwardsForeign

27800000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

80905000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

86092000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

226884000

USD

CY2018Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

181110000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

2164810000

USD

CY2018Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

1749281000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

627378000

USD

CY2018Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

843328000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities Prepaid Expenses

DeferredTaxLiabilitiesPrepaidExpenses

0

USD

CY2018Q4

us-gaap

Deferred Tax Liabilities Prepaid Expenses

DeferredTaxLiabilitiesPrepaidExpenses

25433000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities Unrealized Currency Transaction Gains

DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains

33803000

USD

CY2018Q4

us-gaap

Deferred Tax Liabilities Unrealized Currency Transaction Gains

DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains

52928000

USD

CY2017Q4

us-gaap

Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries

DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries

1442900000

USD

CY2018Q4

us-gaap

Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries

DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries

1364100000

USD

CY2017Q4

us-gaap

Defined Benefit Plan Benefit Obligation

DefinedBenefitPlanBenefitObligation

172143000

USD

CY2018Q4

us-gaap

Defined Benefit Plan Benefit Obligation

DefinedBenefitPlanBenefitObligation

178604000

USD

CY2017Q4

us-gaap

Defined Benefit Plan Fair Value Of Plan Assets

DefinedBenefitPlanFairValueOfPlanAssets

103236000

USD

CY2018Q4

us-gaap

Defined Benefit Plan Fair Value Of Plan Assets

DefinedBenefitPlanFairValueOfPlanAssets

102561000

USD

CY2017Q4

us-gaap

Defined Benefit Plan Funded Status Of Plan

DefinedBenefitPlanFundedStatusOfPlan

-68907000

USD

CY2018Q4

us-gaap

Defined Benefit Plan Funded Status Of Plan

DefinedBenefitPlanFundedStatusOfPlan

-76043000

USD

CY2017Q4

us-gaap

Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation

DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

169705000

USD

CY2018Q4

us-gaap

Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation

DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

174400000

USD

CY2016

us-gaap

Defined Contribution Plan Cost Recognized

DefinedContributionPlanCostRecognized

9900000

USD

CY2017

us-gaap

Defined Contribution Plan Cost Recognized

DefinedContributionPlanCostRecognized

14200000

USD

CY2018

us-gaap

Defined Contribution Plan Cost Recognized

DefinedContributionPlanCostRecognized

15300000

USD

CY2016

us-gaap

Depreciation

16600000

USD

CY2017

us-gaap

Depreciation

17200000

USD

CY2018

us-gaap

Depreciation

18300000

USD

CY2016

us-gaap

Depreciation And Amortization

DepreciationAndAmortization

557055000

USD

CY2017

us-gaap

Depreciation And Amortization

DepreciationAndAmortization

705964000

USD

CY2018

us-gaap

Depreciation And Amortization

DepreciationAndAmortization

574362000

USD

CY2016

us-gaap

Depreciation Depletion And Amortization

DepreciationDepletionAndAmortization

26853000

USD

CY2017

us-gaap

Depreciation Depletion And Amortization

DepreciationDepletionAndAmortization

52902000

USD

CY2018

us-gaap

Depreciation Depletion And Amortization

DepreciationDepletionAndAmortization

45127000

USD

CY2017Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

20258000

USD

CY2018Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

18581000

USD

CY2017Q4

us-gaap

Derivative Asset Fair Value Of Collateral

DerivativeAssetFairValueOfCollateral

862000

USD

CY2018Q4

us-gaap

Derivative Asset Fair Value Of Collateral

DerivativeAssetFairValueOfCollateral

0

USD

CY2017Q4

us-gaap

Derivative Assets

DerivativeAssets

178272000

USD

CY2018Q4

us-gaap

Derivative Assets

DerivativeAssets

228488000

USD

CY2017

us-gaap

Derivative Average Remaining Maturity1

DerivativeAverageRemainingMaturity1

P3Y5M

CY2018

us-gaap

Derivative Average Remaining Maturity1

DerivativeAverageRemainingMaturity1

P4Y8M

CY2017Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

185900000

USD

CY2018Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

235611000

USD

CY2017Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

22221000

USD

CY2018Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

24080000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

320724000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

356666000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

-8490000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

-7123000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

1058727000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

990895000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

-56136000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

-68007000

USD

CY2017Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

24241000

USD

CY2018Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

27449000

USD

CY2017Q4

us-gaap

Derivative Liability Fair Value Gross Asset

DerivativeLiabilityFairValueGrossAsset

20258000

USD

CY2018Q4

us-gaap

Derivative Liability Fair Value Gross Asset

DerivativeLiabilityFairValueGrossAsset

18581000

USD

CY2018Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

4.76

CY2018Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.75

CY2018

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

11.25

CY2016

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

10.79

CY2017Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

2.22

CY2017Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.54

CY2017Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.47

CY2017Q4

us-gaap

Derivative Liability Fair Value Of Collateral

DerivativeLiabilityFairValueOfCollateral

58156000

USD

CY2018Q4

us-gaap

Derivative Liability Fair Value Of Collateral

DerivativeLiabilityFairValueOfCollateral

71376000

USD

CY2016

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

57562000

USD

CY2017

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

61571000

USD

CY2018

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

62526000

USD

CY2016

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

100371000

USD

CY2017

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

117291000

USD

CY2018

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

140110000

USD

CY2016

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

10.91

CY2017Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

2.26

CY2017Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.60

CY2017Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.53

CY2017Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

18.89

CY2017

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

28.28

CY2018Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.55

CY2018Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.19

CY2017Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

18.49

CY2017

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

27.71

CY2018Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.52

CY2018Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.13

CY2018Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

4.68

CY2018Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.72

CY2018

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

11.00

CY2016

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-19938000

USD

CY2017

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

52693000

USD

CY2018

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-36387000

USD

CY2016

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.328

CY2017

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

-0.594

CY2018

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.154

CY2018Q4

us-gaap

Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized

EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

24700000

USD

CY2018

us-gaap

Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1

EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1

P1Y5M

CY2006Q2

us-gaap

Equity Method Investment Aggregate Cost

EquityMethodInvestmentAggregateCost

112800000

USD

CY2017Q4

us-gaap

Equity Method Investments Fair Value Disclosure

EquityMethodInvestmentsFairValueDisclosure

60346000

USD

CY2018Q4

us-gaap

Equity Method Investments Fair Value Disclosure

EquityMethodInvestmentsFairValueDisclosure

82197000

USD

CY2017Q4

us-gaap

Equity Securities Fv Ni

EquitySecuritiesFvNi

100152000

USD

CY2018Q4

us-gaap

Equity Securities Fv Ni

EquitySecuritiesFvNi

82197000

USD

CY2016

us-gaap

Excess Tax Benefit From Share Based Compensation Financing Activities

ExcessTaxBenefitFromShareBasedCompensationFinancingActivities

162000

USD

CY2017

us-gaap

Excess Tax Benefit From Share Based Compensation Financing Activities

ExcessTaxBenefitFromShareBasedCompensationFinancingActivities

0

USD

CY2018

us-gaap

Excess Tax Benefit From Share Based Compensation Financing Activities

ExcessTaxBenefitFromShareBasedCompensationFinancingActivities

0

USD

CY2016

us-gaap

Excess Tax Benefit From Share Based Compensation Operating Activities

ExcessTaxBenefitFromShareBasedCompensationOperatingActivities

162000

USD

CY2017

us-gaap

Excess Tax Benefit From Share Based Compensation Operating Activities

ExcessTaxBenefitFromShareBasedCompensationOperatingActivities

0

USD

CY2018

us-gaap

Excess Tax Benefit From Share Based Compensation Operating Activities

ExcessTaxBenefitFromShareBasedCompensationOperatingActivities

0

USD

CY2017Q4

us-gaap

Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement

FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement

428344000

USD

CY2018Q4

us-gaap

Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement

FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement

554589000

USD

CY2017Q4

us-gaap

Financial Liabilities Fair Value Disclosure

FinancialLiabilitiesFairValueDisclosure

1038469000

USD

CY2018Q4

us-gaap

Financial Liabilities Fair Value Disclosure

FinancialLiabilitiesFairValueDisclosure

972314000

USD

CY2017Q4

us-gaap

Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment

FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment

9384000

USD

CY2018Q4

us-gaap

Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment

FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment

11286000

USD

CY2017Q4

us-gaap

Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1

FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1

0

USD

CY2018Q4

us-gaap

Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1

FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1

0

USD

CY2017Q4

us-gaap

Financing Receivable Collectively Evaluated For Impairment

FinancingReceivableCollectivelyEvaluatedForImpairment

4407313000

USD

CY2018Q4

us-gaap

Financing Receivable Collectively Evaluated For Impairment

FinancingReceivableCollectivelyEvaluatedForImpairment

4952719000

USD

CY2017Q4

us-gaap

Financing Receivable Individually Evaluated For Impairment

FinancingReceivableIndividuallyEvaluatedForImpairment

5858000

USD

CY2018Q4

us-gaap

Financing Receivable Individually Evaluated For Impairment

FinancingReceivableIndividuallyEvaluatedForImpairment

30635000

USD

CY2017Q4

us-gaap

Financing Receivable Recorded Investment Current

FinancingReceivableRecordedInvestmentCurrent

4394015000

USD

CY2018Q4

us-gaap

Financing Receivable Recorded Investment Current

FinancingReceivableRecordedInvestmentCurrent

4983354000

USD

CY2017Q4

us-gaap

Financing Receivable Recorded Investment Past Due

FinancingReceivableRecordedInvestmentPastDue

19156000

USD

CY2018Q4

us-gaap

Financing Receivable Recorded Investment Past Due

FinancingReceivableRecordedInvestmentPastDue

0

USD

CY2018Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Next Twelve Months

FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

8100000

USD

CY2018Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Five

FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

6200000

USD

CY2018Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Four

FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

6400000

USD

CY2018Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Three

FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

6600000

USD

CY2018Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Two

FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

7600000

USD

CY2017Q4

us-gaap

Funds Held Under Reinsurance Agreements Asset

FundsHeldUnderReinsuranceAgreementsAsset

6083388000

USD

CY2018Q4

us-gaap

Funds Held Under Reinsurance Agreements Asset

FundsHeldUnderReinsuranceAgreementsAsset

5761471000

USD

CY2016

us-gaap

Gain Loss On Investments

GainLossOnInvestments

94195000

USD

CY2017

us-gaap

Gain Loss On Investments

GainLossOnInvestments

167880000

USD

CY2018

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-170088000

USD

CY2016

us-gaap

Gain Loss On Sale Of Equity Investments

GainLossOnSaleOfEquityInvestments

0

USD

CY2017

us-gaap

Gain Loss On Sale Of Equity Investments

GainLossOnSaleOfEquityInvestments

0

USD

CY2018

us-gaap

Gain Loss On Sale Of Equity Investments

GainLossOnSaleOfEquityInvestments

-23184000

USD

CY2016

us-gaap

Gain Loss On Sale Of Other Investments

GainLossOnSaleOfOtherInvestments

132926000

USD

CY2017

us-gaap

Gain Loss On Sale Of Other Investments

GainLossOnSaleOfOtherInvestments

210519000

USD

CY2018

us-gaap

Gain Loss On Sale Of Other Investments

GainLossOnSaleOfOtherInvestments

-141594000

USD

CY2017Q4

us-gaap

Goodwill

7000000

USD

CY2018Q4

us-gaap

Goodwill

7000000

USD

CY2016

us-gaap

Gross Investment Income Operating

GrossInvestmentIncomeOperating

1983975000

USD

CY2017

us-gaap

Gross Investment Income Operating

GrossInvestmentIncomeOperating

2235362000

USD

CY2018

us-gaap

Gross Investment Income Operating

GrossInvestmentIncomeOperating

2229031000

USD

CY2017Q4

us-gaap

Guaranteed Interest Contracts

GuaranteedInterestContracts

16227642000

USD

CY2018Q4

us-gaap

Guaranteed Interest Contracts

GuaranteedInterestContracts

18004526000

USD

CY2016

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

2249000

USD

CY2017

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

3621000

USD

CY2018

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

24240000

USD

CY2016

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

142000

USD

CY2017

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

186000

USD

CY2018

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

1129000

USD

CY2017Q4

us-gaap

Impaired Financing Receivable Recorded Investment

ImpairedFinancingReceivableRecordedInvestment

5858000

USD

CY2018Q4

us-gaap

Impaired Financing Receivable Recorded Investment

ImpairedFinancingReceivableRecordedInvestment

30635000

USD

CY2017Q4

us-gaap

Impaired Financing Receivable Related Allowance

ImpairedFinancingReceivableRelatedAllowance

0

USD

CY2018Q4

us-gaap

Impaired Financing Receivable Related Allowance

ImpairedFinancingReceivableRelatedAllowance

0

USD

CY2017Q4

us-gaap

Impaired Financing Receivable Unpaid Principal Balance

ImpairedFinancingReceivableUnpaidPrincipalBalance

6427000

USD

CY2018Q4

us-gaap

Impaired Financing Receivable Unpaid Principal Balance

ImpairedFinancingReceivableUnpaidPrincipalBalance

30660000

USD

CY2016

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

38805000

USD

CY2017

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

42639000

USD

CY2018

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

28494000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

758496000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

870532000

USD

CY2018

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

626197000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

285450000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

272283000

USD

CY2018

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

219623000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments