$unm 2016 10-K

Concept	2016	2015 Q4	2015 Q3
Revenue	$11.05B	$2.722B	$2.658B
YoY Change	2.94%	3.16%	1.66%
Cost Of Revenue	$6.942B		$1.691B
YoY Change	2.34%		2.26%
Gross Profit	$4.105B		$966.9M
YoY Change	3.96%		0.65%
Gross Profit Margin	37.16%		36.38%
Selling, General & Admin	$832.0M	$211.1M	$205.9M
YoY Change	-0.36%	-1.26%	-0.1%
% of Gross Profit	20.27%		21.29%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$493.0M	$25.50M	$117.0M
YoY Change	2.22%	16.44%	8.43%
% of Gross Profit	12.01%		12.1%
Operating Expenses	$9.532B	$2.367B	$2.321B
YoY Change	2.04%	-22.53%	2.74%
Operating Profit	-$5.427B		-$1.354B
YoY Change	0.65%		4.29%
Interest Expense	-$166.0M	-$38.90M	-$38.10M
YoY Change	8.5%	1.04%	-0.78%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$1.216B	$316.6M	$298.9M
YoY Change	14.94%	-169.64%	-5.71%
Income Tax	$416.3M	$90.50M	$95.10M
% Of Pretax Income	34.24%	28.58%	31.82%
Net Earnings	$931.4M	$226.1M	$203.8M
YoY Change	7.42%	-180.12%	-6.98%
Net Earnings / Revenue	8.43%	8.31%	7.67%
Basic Earnings Per Share	$3.96	$0.93	$0.83
Diluted Earnings Per Share	$3.95	$0.93	$0.83
COMMON SHARES
Basic Shares Outstanding	235.4M shares	243.4M shares	245.4M shares
Diluted Shares Outstanding	236.0M shares		246.3M shares

Concept	2016	2015 Q4	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$100.0M	$113.0M	$109.0M
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	$1.118B	$523.9M	$529.6M
YoY Change	-3.7%	-1.47%	-0.34%
Goodwill		$230.9M	$232.1M
YoY Change		16.21%	15.65%
Intangibles
YoY Change
Long-Term Investments	$51.10B	$49.97B	$50.87B
YoY Change	2.25%	-3.37%	-0.97%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$61.94B	$60.56B	$61.50B
YoY Change	2.28%	-3.02%	-0.74%
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
Long-Term Debt Due	$0.00	$352.0M	$506.0M
YoY Change	-100.0%	131.73%	622.86%
Total Short-Term Liabilities	$427.0M	$773.0M	$922.0M
YoY Change	-44.76%	242.04%	1052.5%
LONG-TERM LIABILITIES
Long-Term Debt	$2.999B	$2.449B	$2.217B
YoY Change	22.46%	-6.82%	-20.34%
Other Long-Term Liabilities	$1.676B	$1.501B	$1.550B
YoY Change	11.66%	0.13%	20.16%
Total Long-Term Liabilities	$4.675B	$2.449B	$3.767B
YoY Change	18.35%	-6.82%	-7.51%
TOTAL LIABILITIES
Total Short-Term Liabilities	$427.0M	$773.0M	$922.0M
Total Long-Term Liabilities	$4.675B	$2.449B	$3.767B
Total Liabilities	$52.97B	$51.90B	$52.92B
YoY Change	2.07%	-3.76%	0.39%
SHAREHOLDERS EQUITY
Retained Earnings		$7.995B	$7.814B
YoY Change		9.49%	-9.46%
Common Stock		$2.278B	$2.269B
YoY Change		1.16%	-15.55%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$1.625B	$1.524B
YoY Change		35.61%	-42.47%
Treasury Stock Shares		61.79M shares	58.96M shares
Shareholders Equity	$8.968B	$8.664B	$8.581B
YoY Change
Total Liabilities & Shareholders Equity	$61.94B	$60.56B	$61.50B
YoY Change	2.28%	-3.02%	-0.74%

Concept	2016	2015 Q4	2015 Q3
OPERATING ACTIVITIES
Net Income	$931.4M	$226.1M	$203.8M
YoY Change	7.42%	-180.12%	-6.98%
Depreciation, Depletion And Amortization	$493.0M	$25.50M	$117.0M
YoY Change	2.22%	16.44%	8.43%
Cash From Operating Activities	$1.122B	$292.7M	$273.0M
YoY Change	-13.2%	4.69%	25.11%
INVESTING ACTIVITIES
Capital Expenditures	$85.00M	-$26.90M	-$20.20M
YoY Change	-15.17%	-2.89%	-28.87%
Acquisitions	$129.2M
YoY Change	137.94%
Other Investing Activities	$0.00	-$231.3M	-$81.90M
YoY Change		41.04%	-4.1%
Cash From Investing Activities	-$715.5M	-$258.2M	-$102.1M
YoY Change	0.35%	34.69%	-10.28%
FINANCING ACTIVITIES
Cash Dividend Paid	$182.6M
YoY Change	4.82%
Common Stock Issuance & Retirement, Net	$396.7M
YoY Change	-3.6%
Debt Paid & Issued, Net	$414.0M
YoY Change	82.94%
Cash From Financing Activities	-$418.6M	-30.90M	-184.2M
YoY Change	-26.39%	-32.83%	18.23%
NET CHANGE
Cash From Operating Activities	$1.122B	292.7M	273.0M
Cash From Investing Activities	-$715.5M	-258.2M	-102.1M
Cash From Financing Activities	-$418.6M	-30.90M	-184.2M
Net Change In Cash	-$12.50M	3.600M	-13.30M
YoY Change	-220.19%	-91.41%	-74.12%
FREE CASH FLOW
Cash From Operating Activities	$1.122B	$292.7M	$273.0M
Capital Expenditures	$85.00M	-$26.90M	-$20.20M
Free Cash Flow	$1.037B	$319.6M	$293.2M
YoY Change	-13.03%	4.0%	18.9%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	dei	Amendment Flag AmendmentFlag	false
CY2016	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0000005513
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CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2016	dei	Entity Registrant Name EntityRegistrantName	Unum Group
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2016	dei	Trading Symbol TradingSymbol	UNM
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CY2014Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1687400000	USD
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CY2016Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1052000000	USD
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CY2015	unm	A2017 Uk Tax Rate A2017UKTaxRate	0.19	Rate
CY2016	unm	A2020 Uk Tax Rate A2020UKTaxRate	0.17	Rate
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CY2016	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit	-425600000	USD
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CY2016	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	-200600000	USD
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CY2016Q4	unm	Committments To Fund Commercial Mortgage Loans CommittmentsToFundCommercialMortgageLoans	32100000	USD
CY2015Q4	unm	Count Of Financing Receivable Recorded Investment Nonaccrual Status CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus	0
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CY2016Q4	unm	Excessof Financial Reporting Carrying Amount Overthe Tax Basisof Investmentsin Foreign Subsidiaries Provision Not Practicable ExcessofFinancialReportingCarryingAmountOvertheTaxBasisofInvestmentsinForeignSubsidiariesProvisionNotPracticable	1000000000	USD
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CY2014Q4	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	7850900000	USD
CY2015Q4	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	7946300000	USD
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CY2016Q4	unm	Line Of Credit Facility Maximum Borrowing Capacity If Requested LineOfCreditFacilityMaximumBorrowingCapacityIfRequested	600000000	USD
CY2016Q4	unm	Loan To Value Ratio Maximum LoanToValueRatioMaximum	0.75
CY2016	unm	Loan To Value Ratio Update Frequency LoanToValueRatioUpdateFrequency	three
CY2016Q4	unm	Mortage Loan Policy Debt Service Coverage Ratio Lower Range MortageLoanPolicyDebtServiceCoverageRatioLowerRange	1.25
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CY2016	unm	Number Of Changes To Accounting Policy For Estimating Credit Losses On Mortgage Loans NumberOfChangesToAccountingPolicyForEstimatingCreditLossesOnMortgageLoans	0
CY2016Q4	unm	Number Of Companies That Make Up Majority Of Reinsurance Recoverable NumberOfCompaniesThatMakeUpMajorityOfReinsuranceRecoverable	13
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CY2016	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	5500000	USD
CY2014	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	800000	USD
CY2015	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	100000	USD
CY2016	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	700000	USD
CY2016	unm	Outstanding Performance Share Unit Awards Grant Price Range Lower Limit OutstandingPerformanceShareUnitAwardsGrantPriceRangeLowerLimit	27.85
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CY2016Q4	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2015Q4	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3150100000	USD
CY2016Q4	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3206100000	USD
CY2014	unm	Premium Tax Expense PremiumTaxExpense	139200000	USD
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CY2016	unm	Premium Tax Expense PremiumTaxExpense	152500000	USD
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CY2016	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	200000	USD
CY2014Q4	unm	Tax Attributable To Temporary Items Included Above TaxAttributableToTemporaryItemsIncludedAbove	10400000	USD
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CY2014	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	18600000	USD
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CY2016	unm	Tax Expense Not Recognized Due To Permanent Differences TaxExpenseNotRecognizedDueToPermanentDifferences	200000000	USD
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CY2015	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	23300000	USD
CY2016	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	23200000	USD
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CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	300000	shares
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CY2014	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	189800000	USD
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CY2015Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	39658700000	USD
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CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	146300000	USD
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CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	4667300000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	577300000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	801900000	USD
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CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	10991600000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6514000000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6231000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	19194600000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	18886400000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1112200000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1338800000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	2318600000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	2104900000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	43354400000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	44217300000	USD
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CY2015	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	23800000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	34300000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	7500000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	25600000	USD
CY2016	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	17200000	USD
CY2015Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	27300000	USD
CY2016Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	35200000	USD
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CY2016Q4	us-gaap	Business Acquisition Percentage Of Voting Interests Acquired BusinessAcquisitionPercentageOfVotingInterestsAcquired	1	Rate
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CY2015	us-gaap	Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod	129900000	USD
CY2016Q4	us-gaap	Business Combination Contingent Consideration Liability Noncurrent BusinessCombinationContingentConsiderationLiabilityNoncurrent	10000000	USD
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CY2014Q4	us-gaap	Cash Cash	102500000	USD
CY2015Q4	us-gaap	Cash Cash	112900000	USD
CY2016Q4	us-gaap	Cash Cash	100400000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8400000	USD
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CY2015Q4	us-gaap	Collateralized Financings CollateralizedFinancings	415400000	USD
CY2016Q4	us-gaap	Collateralized Financings CollateralizedFinancings	406000000	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2016Q4	us-gaap	Common Stock Value CommonStockValue	30400000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	313500000	USD
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CY2016Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2094200000	USD
CY2014	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	83200000	USD
CY2015	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	87400000	USD
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CY2015Q4	us-gaap	Deferred Revenue And Credits DeferredRevenueAndCredits	31900000	USD
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CY2016Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	600000	USD
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CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1300000	USD
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CY2016Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	174900000	USD
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CY2015Q4	us-gaap	Derivative Assets DerivativeAssets	49800000	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	32700000	USD
CY2015Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	36400000	USD
CY2016Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	25400000	USD
CY2015Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	12800000	USD
CY2016Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	7300000	USD
CY2016	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	900000	USD
CY2016	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	200000	USD
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CY2016	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.05	Rate
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CY2016Q4	us-gaap	Derivative Amount Of Hedged Item DerivativeAmountOfHedgedItem	3500000	USD
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CY2015Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	600000	USD
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CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash	55300000	USD
CY2015Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	165400000	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	155900000	USD
CY2015Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	231400000	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	211200000	USD
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CY2015Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2016Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
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CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	600000	USD
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CY2016	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	53300000	USD
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CY2015Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	14600000	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	15200000	USD
CY2015Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	0	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	0	USD
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CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash	0	USD
CY2015Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	64600000	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	67500000	USD
CY2015Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	79200000	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	82700000	USD
CY2015Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	50200000	USD
CY2016Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	52800000	USD
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CY2015	us-gaap	Direct Premiums Earned DirectPremiumsEarned	8151900000	USD
CY2016	us-gaap	Direct Premiums Earned DirectPremiumsEarned	8385000000	USD
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CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.51
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.00
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.07
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.96
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.57
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.50
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.01
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.95
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.258
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.309
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.04
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.025
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.022
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.011
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.045
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.014
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.016
CY2014	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	3300000	USD
CY2015	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-37700000	USD
CY2016	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	40900000	USD
CY2015Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	1837100000	USD
CY2016Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	1919400000	USD
CY2015Q4	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	1376500000	USD
CY2016Q4	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	2154900000	USD
CY2016Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	251900000	USD
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	350000000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	350000000	USD
CY2015Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	30900000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	31600000	USD
CY2014	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3500000	USD
CY2015	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-17600000	USD
CY2016	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-900000	USD
CY2014	us-gaap	Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet	0	USD
CY2015	us-gaap	Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet	0	USD
CY2016	us-gaap	Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet	0	USD
CY2014	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2015	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2016	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2016	us-gaap	Gain Loss From Hedged Firm Commitment Not Qualifying As Fair Value Hedge Net GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet	0	USD
CY2014	us-gaap	Gain Loss On Investments GainLossOnInvestments	16100000	USD
CY2015Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	-15300000	USD
CY2015Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	800000	USD
CY2015Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-26600000	USD
CY2015Q4	us-gaap	Gain Loss On Investments GainLossOnInvestments	-2700000	USD
CY2015	us-gaap	Gain Loss On Investments GainLossOnInvestments	-43800000	USD
CY2016Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	-20500000	USD
CY2016Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	5300000	USD
CY2016Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	11000000	USD
CY2016Q4	us-gaap	Gain Loss On Investments GainLossOnInvestments	28400000	USD
CY2016	us-gaap	Gain Loss On Investments GainLossOnInvestments	24200000	USD
CY2014	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	29600000	USD
CY2015	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	-11400000	USD
CY2016	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	54700000	USD
CY2014	us-gaap	Gain On Cash Flow Hedge Ineffectiveness GainOnCashFlowHedgeIneffectiveness	0	USD
CY2015	us-gaap	Gain On Cash Flow Hedge Ineffectiveness GainOnCashFlowHedgeIneffectiveness	0	USD
CY2016	us-gaap	Gain On Cash Flow Hedge Ineffectiveness GainOnCashFlowHedgeIneffectiveness	0	USD
CY2014	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	0	USD
CY2015	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	0	USD
CY2016	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	0	USD
CY2014	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
CY2015	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
CY2016	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
CY2015Q4	us-gaap	Goodwill Goodwill	230900000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	335100000	USD
CY2014	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	26700000	USD
CY2015	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	8600000	USD
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	2200000	USD
CY2014	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1000000	USD
CY2015	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	600000	USD
CY2014	us-gaap	Impairment Of Investments ImpairmentOfInvestments	3400000	USD
CY2015	us-gaap	Impairment Of Investments ImpairmentOfInvestments	5900000	USD
CY2016	us-gaap	Impairment Of Investments ImpairmentOfInvestments	5700000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	391700000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1057800000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1215800000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	150300000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	180500000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	131900000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	542000000	USD
CY2015Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	303000000	USD
CY2015Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	319800000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	298900000	USD
CY2015Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	316600000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1238300000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	304200000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	340200000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	332100000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	371200000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1347700000	USD
CY2015Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	-6800000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	139900000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	371200000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	416300000	USD
CY2014	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	103200000	USD
CY2015	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	330500000	USD
CY2016	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	473800000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-6500000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-4500000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	155700000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	189100000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	384300000	USD
CY2014	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-18600000	USD
CY2015	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	180500000	USD
CY2016	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	34700000	USD
CY2014	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	195700000	USD
CY2015	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	194100000	USD
CY2016	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	187700000	USD
CY2014	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	-3800000	USD
CY2015	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	341600000	USD
CY2016	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	-9400000	USD
CY2014	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	524000000	USD
CY2015	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	569700000	USD
CY2016	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	592400000	USD
CY2014	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	972200000	USD
CY2015	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	293900000	USD
CY2016	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	368200000	USD
CY2014	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	105200000	USD
CY2015	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	20000000	USD
CY2016	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	125800000	USD
CY2014	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	21500000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-29300000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	167300000	USD
CY2014	us-gaap	Insurance Commissions InsuranceCommissions	935300000	USD
CY2015	us-gaap	Insurance Commissions InsuranceCommissions	996300000	USD
CY2016	us-gaap	Insurance Commissions InsuranceCommissions	1026700000	USD
CY2014	us-gaap	Interest And Debt Expense InterestAndDebtExpense	167500000	USD
CY2015	us-gaap	Interest And Debt Expense InterestAndDebtExpense	152800000	USD
CY2016	us-gaap	Interest And Debt Expense InterestAndDebtExpense	166000000	USD
CY2014	us-gaap	Interest Paid InterestPaid	145900000	USD
CY2015	us-gaap	Interest Paid InterestPaid	146900000	USD
CY2016	us-gaap	Interest Paid InterestPaid	153600000	USD
CY2014	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	2536300000	USD
CY2015	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	2527000000	USD
CY2016	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	2505100000	USD
CY2014	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	29000000	USD

CY2016

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false

CY2016

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Current Fiscal Year End Date

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--12-31

CY2016

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Document Fiscal Period Focus

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FY

CY2016

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Document Fiscal Year Focus

DocumentFiscalYearFocus

2016

CY2016

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Document Period End Date

DocumentPeriodEndDate

2016-12-31

CY2016

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Document Type

DocumentType

10-K

CY2016

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Entity Central Index Key

EntityCentralIndexKey

0000005513

CY2017Q1

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Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

229229236

shares

CY2016

dei

Entity Current Reporting Status

EntityCurrentReportingStatus

Yes

CY2016

dei

Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

CY2016Q2

dei

Entity Public Float

EntityPublicFloat

7500000000

USD

CY2016

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Entity Registrant Name

EntityRegistrantName

Unum Group

CY2016

dei

Entity Voluntary Filers

EntityVoluntaryFilers

No

CY2016

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Entity Well Known Seasoned Issuer

EntityWellKnownSeasonedIssuer

Yes

CY2016

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Trading Symbol

TradingSymbol

UNM

CY2013Q4

invest

Derivative Notional Amount

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1477400000

USD

CY2014Q4

invest

Derivative Notional Amount

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1687400000

USD

CY2015Q4

invest

Derivative Notional Amount

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1470300000

USD

CY2016Q4

invest

Derivative Notional Amount

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1052000000

USD

CY2015

unm

A2015 Uk Tax Rate

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0.20

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CY2015

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A2017 Uk Tax Rate

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0.19

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CY2016

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A2020 Uk Tax Rate

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0.17

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0.18

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unm

Accident And Health Active Life Reserves

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9263500000

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CY2015Q4

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Accident And Health Active Life Reserves

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9704400000

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CY2016Q4

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Accident And Health Active Life Reserves

AccidentAndHealthActiveLifeReserves

10172900000

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CY2014

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Amount Funded To Special Purpose Entity Partnerships

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nor did we fund any amounts to the partnership

CY2015

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Amount Funded To Special Purpose Entity Partnerships

AmountFundedToSpecialPurposeEntityPartnerships

nor did we fund any amounts to the partnership

CY2016

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Amount Funded To Special Purpose Entity Partnerships

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nor did we fund any amounts to the partnership

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Assets Participation Fund Account

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CY2016Q4

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Assets Participation Fund Account

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331100000

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CY2015Q4

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Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal

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37340100000

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CY2016Q4

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Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal

AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal

37447800000

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CY2014

unm

Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit

-1284700000

USD

CY2015

unm

Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit

1634900000

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CY2016

unm

Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit

-425600000

USD

CY2014

unm

Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

-665100000

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CY2015

unm

Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

856600000

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CY2016

unm

Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

-200600000

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CY2016Q4

unm

Collateral Requirements Minimum Percentage Collateral To Fair Value Of Securities Loaned Or Purchased Under Repurchase Agreements

CollateralRequirementsMinimumPercentageCollateralToFairValueOfSecuritiesLoanedOrPurchasedUnderRepurchaseAgreements

1.02

CY2016Q4

unm

Commitment To Fund Private Placement Fixed Maturity Securities

CommitmentToFundPrivatePlacementFixedMaturitySecurities

30000000

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CY2016Q4

unm

Commitments To Fund Special Purpose Entities

CommitmentsToFundSpecialPurposeEntities

0

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CY2016Q4

unm

Committments To Fund Commercial Mortgage Loans

CommittmentsToFundCommercialMortgageLoans

32100000

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CY2015Q4

unm

Count Of Financing Receivable Recorded Investment Nonaccrual Status

CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus

0

CY2016Q4

unm

Count Of Financing Receivable Recorded Investment Nonaccrual Status

CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus

0

CY2016Q4

unm

Excessof Financial Reporting Carrying Amount Overthe Tax Basisof Investmentsin Foreign Subsidiaries Provision Not Practicable

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1000000000

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CY2014

unm

Investment Income On Pfa Assets

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15100000

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CY2015

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Investment Income On Pfa Assets

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14600000

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Investment Income On Pfa Assets

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14200000

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CY2014Q4

unm

Life Reserves For Future Policy And Contract Benefits

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7850900000

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CY2015Q4

unm

Life Reserves For Future Policy And Contract Benefits

LifeReservesForFuturePolicyAndContractBenefits

7946300000

USD

CY2016Q4

unm

Life Reserves For Future Policy And Contract Benefits

LifeReservesForFuturePolicyAndContractBenefits

8078200000

USD

CY2016Q4

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Line Of Credit Facility Maximum Borrowing Capacity If Requested

LineOfCreditFacilityMaximumBorrowingCapacityIfRequested

600000000

USD

CY2016Q4

unm

Loan To Value Ratio Maximum

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0.75

CY2016

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Loan To Value Ratio Update Frequency

LoanToValueRatioUpdateFrequency

three

CY2016Q4

unm

Mortage Loan Policy Debt Service Coverage Ratio Lower Range

MortageLoanPolicyDebtServiceCoverageRatioLowerRange

1.25

CY2016

unm

Mortgage Loan Inspection Frequency

MortgageLoanInspectionFrequency

two

CY2016

unm

Mortgageloanpolicyamortizationperiod

25

CY2016

unm

Net Operating Loss Benefit

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1200000

USD

CY2014

unm

Notional Amount Of Derivatives Additions

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318100000

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CY2015

unm

Notional Amount Of Derivatives Additions

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96000000

USD

CY2016

unm

Notional Amount Of Derivatives Additions

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33500000

USD

CY2014

unm

Notional Amount Of Derivatives Terminations

NotionalAmountOfDerivativesTerminations

108100000

USD

CY2015

unm

Notional Amount Of Derivatives Terminations

NotionalAmountOfDerivativesTerminations

313100000

USD

CY2016

unm

Notional Amount Of Derivatives Terminations

NotionalAmountOfDerivativesTerminations

451800000

USD

CY2016

unm

Number Of Changes To Accounting Policy For Estimating Credit Losses On Mortgage Loans

NumberOfChangesToAccountingPolicyForEstimatingCreditLossesOnMortgageLoans

0

CY2016Q4

unm

Number Of Companies That Make Up Majority Of Reinsurance Recoverable

NumberOfCompaniesThatMakeUpMajorityOfReinsuranceRecoverable

13

CY2014

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

21200000

USD

CY2015

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

16000000

USD

CY2016

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

5500000

USD

CY2014

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

800000

USD

CY2015

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

100000

USD

CY2016

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

700000

USD

CY2016

unm

Outstanding Performance Share Unit Awards Grant Price Range Lower Limit

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27.85

CY2016

unm

Outstanding Performance Share Unit Awards Grant Price Range Upper Limit

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34.08

CY2016

unm

Outstanding Restricted Stock Unit Grant Prices Lower Limit

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27.85

CY2016

unm

Outstanding Restricted Stock Unit Grant Prices Upper Limit

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36.36

CY2015Q4

unm

Percentage Of Loan Portfolio

PercentageOfLoanPortfolio

1.000

CY2016Q4

unm

Percentage Of Loan Portfolio

PercentageOfLoanPortfolio

1.000

CY2015Q4

unm

Policy Loans Cededto Reinsurers

PolicyLoansCededtoReinsurers

3150100000

USD

CY2016Q4

unm

Policy Loans Cededto Reinsurers

PolicyLoansCededtoReinsurers

3206100000

USD

CY2014

unm

Premium Tax Expense

PremiumTaxExpense

139200000

USD

CY2015

unm

Premium Tax Expense

PremiumTaxExpense

146500000

USD

CY2016

unm

Premium Tax Expense

PremiumTaxExpense

152500000

USD

CY2014

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

100000

USD

CY2015

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

300000

USD

CY2016

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

200000

USD

CY2014Q4

unm

Tax Attributable To Temporary Items Included Above

TaxAttributableToTemporaryItemsIncludedAbove

10400000

USD

CY2015Q4

unm

Tax Attributable To Temporary Items Included Above

TaxAttributableToTemporaryItemsIncludedAbove

0

USD

CY2016Q4

unm

Tax Attributable To Temporary Items Included Above

TaxAttributableToTemporaryItemsIncludedAbove

0

USD

CY2014

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

18600000

USD

CY2015

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

18500000

USD

CY2016

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

18600000

USD

CY2016

unm

Tax Expense Not Recognized Due To Permanent Differences

TaxExpenseNotRecognizedDueToPermanentDifferences

200000000

USD

CY2015Q4

unm

Total Acquiree Assets Purchased

TotalAcquireeAssetsPurchased

18600000

GBP

CY2015Q4

unm

Total Acquiree Assets Purchased

TotalAcquireeAssetsPurchased

28100000

USD

CY2016Q4

unm

Total Acquiree Assets Purchased

TotalAcquireeAssetsPurchased

93100000

USD

CY2015Q4

unm

Total Acquiree Liabilities Purchased

TotalAcquireeLiabilitiesPurchased

7500000

USD

CY2015Q4

unm

Total Acquiree Liabilities Purchased

TotalAcquireeLiabilitiesPurchased

5000000

GBP

CY2016Q4

unm

Total Acquiree Liabilities Purchased

TotalAcquireeLiabilitiesPurchased

55700000

USD

CY2016Q4

unm

Unfunded Unconditional Commitmentto Fund Private Equity Partnerships

UnfundedUnconditionalCommitmenttoFundPrivateEquityPartnerships

400000

USD

CY2014Q4

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

6150300000

USD

CY2015Q4

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

3578400000

USD

CY2016Q4

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

4253200000

USD

CY2016Q4

unm

Unum Group Percentage Ownershipof Provident Financing Trust

UnumGroupPercentageOwnershipofProvidentFinancingTrust

1.00

CY2015Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

702800000

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CY2016Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

693300000

USD

CY2015Q4

us-gaap

Accumulated Amortization Of Other Deferred Costs

AccumulatedAmortizationOfOtherDeferredCosts

133100000

USD

CY2016Q4

us-gaap

Accumulated Amortization Of Other Deferred Costs

AccumulatedAmortizationOfOtherDeferredCosts

119200000

USD

CY2015Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

902600000

USD

CY2016Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

989400000

USD

CY2015Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

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16100000

USD

CY2016Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-51000000

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CY2015Q4

us-gaap

Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

0

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CY2016Q4

us-gaap

Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

0.0

USD

CY2015Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

2247200000

USD

CY2016Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

2272800000

USD

CY2014

us-gaap

Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

3000000

USD

CY2015

us-gaap

Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

3600000

USD

CY2016

us-gaap

Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

300000

USD

CY2014

us-gaap

Affordable Housing Tax Credits And Other Tax Benefits Amount

AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

41800000

USD

CY2015

us-gaap

Affordable Housing Tax Credits And Other Tax Benefits Amount

AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

41800000

USD

CY2016

us-gaap

Affordable Housing Tax Credits And Other Tax Benefits Amount

AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

41800000

USD

CY2014

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

22600000

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CY2015

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

23800000

USD

CY2016

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

21900000

USD

CY2014

us-gaap

Allocated Share Based Compensation Expense Net Of Tax

AllocatedShareBasedCompensationExpenseNetOfTax

14900000

USD

CY2015

us-gaap

Allocated Share Based Compensation Expense Net Of Tax

AllocatedShareBasedCompensationExpenseNetOfTax

15700000

USD

CY2016

us-gaap

Allocated Share Based Compensation Expense Net Of Tax

AllocatedShareBasedCompensationExpenseNetOfTax

14400000

USD

CY2014

us-gaap

Amortization Method Qualified Affordable Housing Project Investments Amortization

AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

23200000

USD

CY2015

us-gaap

Amortization Method Qualified Affordable Housing Project Investments Amortization

AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

23300000

USD

CY2016

us-gaap

Amortization Method Qualified Affordable Housing Project Investments Amortization

AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

23200000

USD

CY2014

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

100000

shares

CY2015

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

300000

shares

CY2016

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

400000

shares

CY2015Q4

us-gaap

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60563600000

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CY2016Q4

us-gaap

Assets

61941500000

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CY2014

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

189800000

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CY2015

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

202800000

USD

CY2016

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

236300000

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CY2015Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

39658700000

USD

CY2016Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

39552700000

USD

CY2015Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

43354400000

USD

CY2016Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

44217300000

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

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146300000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

63700000

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

496000000

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CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

154900000

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

7403900000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

4667300000

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

577300000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

801900000

USD

CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

10519300000

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CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

10991600000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

6514000000

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CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

6231000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

19194600000

USD

CY2016Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

18886400000

USD

CY2015Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

1112200000

USD

CY2016Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

1338800000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

2318600000

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CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

2104900000

USD

CY2015Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

43354400000

USD

CY2016Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

44217300000

USD

CY2014

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

9300000

USD

CY2015

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

23800000

USD

CY2016

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

34300000

USD

CY2014

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

7500000

USD

CY2015

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

25600000

USD

CY2016

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

17200000

USD

CY2015Q4

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

27300000

USD

CY2016Q4

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

35200000

USD

CY2014

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

9982500000

USD

CY2015

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

9493000000

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CY2016

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

9698800000

USD

CY2015

us-gaap

Business Acquisition Name Of Acquired Entity

BusinessAcquisitionNameOfAcquiredEntity

National Dental Plan Limited and associated companies (National Dental)

CY2016

us-gaap

Business Acquisition Name Of Acquired Entity

BusinessAcquisitionNameOfAcquiredEntity

H&J Capital, L.L.C., parent of Starmount Life Insurance Company and AlwaysCare Benefits (Starmount)

CY2015Q4

us-gaap

Business Acquisition Percentage Of Voting Interests Acquired

BusinessAcquisitionPercentageOfVotingInterestsAcquired

1

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CY2016Q4

us-gaap

Business Acquisition Percentage Of Voting Interests Acquired

BusinessAcquisitionPercentageOfVotingInterestsAcquired

1

Rate

CY2014

us-gaap

Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period

BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod

14700000

GBP

CY2014

us-gaap

Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period

BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod

24200000

USD

CY2015

us-gaap

Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period

BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod

129900000

USD

CY2016Q4

us-gaap

Business Combination Contingent Consideration Liability Noncurrent

BusinessCombinationContingentConsiderationLiabilityNoncurrent

10000000

USD

CY2013Q4

us-gaap

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94100000

USD

CY2014Q4

us-gaap

Cash

102500000

USD

CY2015Q4

us-gaap

Cash

112900000

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CY2016Q4

us-gaap

Cash

100400000

USD

CY2014

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

8400000

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CY2015

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

10400000

USD

CY2016

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-12500000

USD

CY2016

us-gaap

Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months

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58000000

USD

CY2014

us-gaap

Ceded Premiums Earned

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291900000

USD

CY2015

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

272300000

USD

CY2016

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

263600000

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CY2015Q4

us-gaap

Collateralized Financings

CollateralizedFinancings

415400000

USD

CY2016Q4

us-gaap

Collateralized Financings

CollateralizedFinancings

406000000

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CY2015Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

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CY2016Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2015Q4

us-gaap

Common Stock Par Or Stated Value Per Share

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0.10

CY2016Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.10

CY2015Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

725000000

shares

CY2016Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

725000000

shares

CY2015Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

302702811

shares

CY2016Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

303552934

shares

CY2015Q4

us-gaap

Common Stock Value

CommonStockValue

30300000

USD

CY2016Q4

us-gaap

Common Stock Value

CommonStockValue

30400000

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CY2014

us-gaap

Comprehensive Income Net Of Tax

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313500000

USD

CY2015

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

716800000

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CY2016

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

864300000

USD

CY2016Q4

us-gaap

Credit Risk Derivatives At Fair Value Net

CreditRiskDerivativesAtFairValueNet

800000

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CY2014

us-gaap

Current Federal Tax Expense Benefit

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160600000

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CY2015

us-gaap

Current Federal Tax Expense Benefit

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280500000

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CY2016

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

414800000

USD

CY2014

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

-25100000

USD

CY2015

us-gaap

Current Foreign Tax Expense Benefit

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61600000

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CY2016

us-gaap

Current Foreign Tax Expense Benefit

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-29400000

USD

CY2014

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

135500000

USD

CY2015

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

342100000

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CY2016

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

385700000

USD

CY2014

us-gaap

Current State And Local Tax Expense Benefit

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0

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CY2015

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

0

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CY2016

us-gaap

Current State And Local Tax Expense Benefit

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300000

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CY2015Q4

us-gaap

Debt Current

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352000000

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CY2016Q4

us-gaap

Debt Current

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0

USD

CY2015Q4

us-gaap

Debt Instrument Unamortized Discount Premium Net

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3800000

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CY2016Q4

us-gaap

Debt Instrument Unamortized Discount Premium Net

DebtInstrumentUnamortizedDiscountPremiumNet

-9800000

USD

CY2014

us-gaap

Deferred Federal Income Tax Expense Benefit

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-50500000

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CY2015

us-gaap

Deferred Federal Income Tax Expense Benefit

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56900000

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CY2016

us-gaap

Deferred Federal Income Tax Expense Benefit

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-14600000

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CY2015Q4

us-gaap

Deferred Finance Costs Current Net

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400000

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CY2016Q4

us-gaap

Deferred Finance Costs Current Net

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0

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CY2015Q4

us-gaap

Deferred Finance Costs Noncurrent Net

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25700000

USD

CY2016Q4

us-gaap

Deferred Finance Costs Noncurrent Net

DeferredFinanceCostsNoncurrentNet

28400000

USD

CY2014

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

54900000

USD

CY2015

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

-27800000

USD

CY2016

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

47300000

USD

CY2014

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

4400000

USD

CY2015

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

29100000

USD

CY2016

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

30600000

USD

CY2015Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

1411300000

USD

CY2016Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

1746400000

USD

CY2014

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

440800000

USD

CY2015

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

482300000

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CY2016

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

493000000

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CY2015Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

2008500000

USD

CY2016Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

2094200000

USD

CY2014

us-gaap

Deferred Policy Acquisition Costs Period Increase Decrease

DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease

83200000

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CY2015

us-gaap

Deferred Policy Acquisition Costs Period Increase Decrease

DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease

87400000

USD

CY2016

us-gaap

Deferred Policy Acquisition Costs Period Increase Decrease

DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease

99400000

USD

CY2015Q4

us-gaap

Deferred Revenue And Credits

DeferredRevenueAndCredits

31900000

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CY2016Q4

us-gaap

Deferred Revenue And Credits

DeferredRevenueAndCredits

23800000

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CY2014

us-gaap

Deferred State And Local Income Tax Expense Benefit

DeferredStateAndLocalIncomeTaxExpenseBenefit

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Deferred State And Local Income Tax Expense Benefit

DeferredStateAndLocalIncomeTaxExpenseBenefit

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CY2016

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Deferred State And Local Income Tax Expense Benefit

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CY2015Q4

us-gaap

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CY2016Q4

us-gaap

Deferred Tax Assets Gross

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CY2015Q4

us-gaap

Deferred Tax Assets Net

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CY2016Q4

us-gaap

Deferred Tax Assets Net

DeferredTaxAssetsNet

1616100000

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CY2015Q4

us-gaap

Deferred Tax Assets Other

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CY2016Q4

us-gaap

Deferred Tax Assets Other

DeferredTaxAssetsOther

17400000

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CY2016Q4

us-gaap

Deferred Tax Assets State Taxes

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18700000

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CY2016Q3

us-gaap

Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax

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600000

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CY2015Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits

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246000000

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CY2016Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits

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307400000

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CY2015Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross

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1060500000

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CY2016Q4

us-gaap

Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross

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1308500000

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CY2015Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

1300000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

17200000

USD

CY2015Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

91800000

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CY2016Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

130300000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

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140400000

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CY2016Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

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174900000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

1128400000

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CY2016Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

1427600000

USD

CY2015Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

55400000

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CY2016Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

63200000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Property Plant And Equipment

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87100000

USD

CY2016Q4

us-gaap

Deferred Tax Liabilities Property Plant And Equipment

DeferredTaxLiabilitiesPropertyPlantAndEquipment

80700000

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CY2016

us-gaap

Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1

DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1

800000

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CY2016

us-gaap

Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1

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200000

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CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability

0

USD

CY2015Q4

us-gaap

Derivative Assets

DerivativeAssets

49800000

USD

CY2016Q4

us-gaap

Derivative Assets

DerivativeAssets

32700000

USD

CY2015Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

36400000

USD

CY2016Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

25400000

USD

CY2015Q4

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

12800000

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CY2016Q4

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

7300000

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CY2016

us-gaap

Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation

DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation

900000

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CY2016

us-gaap

Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components

DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents

200000

USD

CY2016

us-gaap

Defined Benefit Plan Future Amortization Of Gain Loss

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CY2016

us-gaap

Defined Benefit Plan Future Amortization Of Prior Service Cost Credit

DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit

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CY2015

us-gaap

Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year

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0.075

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CY2016

us-gaap

Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year

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0.07

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CY2016

us-gaap

Defined Benefit Plan Ultimate Health Care Cost Trend Rate

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0.05

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CY2014

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

87900000

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CY2015

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

99500000

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CY2016

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

101700000

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CY2016Q4

us-gaap

Derivative Amount Of Hedged Item

DerivativeAmountOfHedgedItem

3500000

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CY2015Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

0

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CY2016Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

0

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CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed

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231400000

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CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed

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211200000

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CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral

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600000

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CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral

0

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CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash

65400000

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CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash

55300000

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CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities

165400000

USD

CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities

155900000

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CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross

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231400000

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CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross

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211200000

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CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability

0

USD

CY2015Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

0

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CY2016Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

0

USD

CY2015Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

49800000

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CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

32700000

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CY2015Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

600000

USD

CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

0

USD

CY2014

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

11000000

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CY2015

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

35700000

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CY2016

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-1500000

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CY2014

us-gaap

Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

53000000

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CY2015

us-gaap

Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

83400000

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CY2016

us-gaap

Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

53300000

USD

CY2014

us-gaap

Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net

DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet

16100000

USD

CY2015

us-gaap

Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net

DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet

67400000

USD

CY2016

us-gaap

Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net

DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet

-22300000

USD

CY2015Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

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USD

CY2016Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

99500000

USD

CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned

79200000

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CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned

82700000

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CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral

14600000

USD

CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral

15200000

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CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset

0

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CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset

0

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CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash

0

USD

CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash

0

USD

CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities

64600000

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CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities

67500000

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CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross

79200000

USD

CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross

82700000

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CY2015Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

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50200000

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CY2016Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

52800000

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CY2014

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

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CY2015

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

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CY2016

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

8385000000

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CY2014

us-gaap

Earnings Per Share Basic

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CY2015Q1

us-gaap

Earnings Per Share Basic

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CY2015Q2

us-gaap

Earnings Per Share Basic

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0.90

CY2015Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.83

CY2015Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.93

CY2015

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.51

CY2016Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.88

CY2016Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.00

CY2016Q3

us-gaap

Earnings Per Share Basic

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1.01

CY2016Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.07

CY2016

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.96

CY2014

us-gaap

Earnings Per Share Diluted

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1.57

CY2015Q1

us-gaap

Earnings Per Share Diluted

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0.84

CY2015Q2

us-gaap

Earnings Per Share Diluted

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0.90

CY2015Q3

us-gaap

Earnings Per Share Diluted

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0.83

CY2015Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.93

CY2015

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.50

CY2016Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.88

CY2016Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.00

CY2016Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.01

CY2016Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.07

CY2016

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.95

CY2014

us-gaap

Effective Income Tax Rate Continuing Operations

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0.258

CY2015

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.3

CY2016

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.309

CY2014

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

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0.35

CY2015

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

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0.35

CY2016

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

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0.35

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential

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-0.04

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential

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-0.025

CY2016

us-gaap

Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential

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-0.022

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

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-0.007

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

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-0.011

CY2016

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

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-0.003

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Tax Credits

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0.045

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Tax Credits

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0.014

CY2016

us-gaap

Effective Income Tax Rate Reconciliation Tax Credits

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0.016

CY2014

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

3300000

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CY2015

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

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CY2016

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

40900000

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CY2015Q4

us-gaap

Fair Value Assets Level1 To Level2 Transfers Amount

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1837100000

USD

CY2016Q4

us-gaap

Fair Value Assets Level1 To Level2 Transfers Amount

FairValueAssetsLevel1ToLevel2TransfersAmount

1919400000

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CY2015Q4

us-gaap

Fair Value Assets Level2 To Level1 Transfers Amount

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1376500000

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CY2016Q4

us-gaap

Fair Value Assets Level2 To Level1 Transfers Amount

FairValueAssetsLevel2ToLevel1TransfersAmount

2154900000

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CY2016Q4

us-gaap

Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments

FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

251900000

USD

CY2015Q4

us-gaap

Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch

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350000000

USD

CY2016Q4

us-gaap

Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch

FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch

350000000

USD

CY2015Q4

us-gaap

Federal Home Loan Bank Stock

FederalHomeLoanBankStock

30900000

USD

CY2016Q4

us-gaap

Federal Home Loan Bank Stock

FederalHomeLoanBankStock

31600000

USD

CY2014

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-3500000

USD

CY2015

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-17600000

USD

CY2016

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

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USD

CY2014

us-gaap

Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

CY2015

us-gaap

Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net

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0

USD

CY2016

us-gaap

Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net

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0

USD

CY2014

us-gaap

Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net

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0

USD

CY2015

us-gaap

Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net

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0

USD

CY2016

us-gaap

Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

CY2016

us-gaap

Gain Loss From Hedged Firm Commitment Not Qualifying As Fair Value Hedge Net

GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet

0

USD

CY2014

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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CY2015Q1

us-gaap

Gain Loss On Investments

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CY2015Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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CY2015Q3

us-gaap

Gain Loss On Investments

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CY2015Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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USD

CY2015

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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USD

CY2016Q1

us-gaap

Gain Loss On Investments

GainLossOnInvestments

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USD

CY2016Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

5300000

USD

CY2016Q3

us-gaap

Gain Loss On Investments

GainLossOnInvestments

11000000

USD

CY2016Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

28400000

USD

CY2016

us-gaap

Gain Loss On Investments

GainLossOnInvestments

24200000

USD

CY2014

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

29600000

USD

CY2015

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

-11400000

USD

CY2016

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

54700000

USD

CY2014

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2015

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2016

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2014

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2015

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2016

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2014

us-gaap

Gains Losses On Sales Of Other Real Estate

GainsLossesOnSalesOfOtherRealEstate

0

USD

CY2015

us-gaap

Gains Losses On Sales Of Other Real Estate

GainsLossesOnSalesOfOtherRealEstate

0

USD

CY2016

us-gaap

Gains Losses On Sales Of Other Real Estate

GainsLossesOnSalesOfOtherRealEstate

0

USD

CY2015Q4

us-gaap

Goodwill

230900000

USD

CY2016Q4

us-gaap

Goodwill

335100000

USD

CY2014

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

26700000

USD

CY2015

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

8600000

USD

CY2016

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

2200000

USD

CY2014

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

1000000

USD

CY2015

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

600000

USD

CY2014

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

3400000

USD

CY2015

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

5900000

USD

CY2016

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

5700000

USD

CY2014

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

391700000

USD

CY2015

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

1057800000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

1215800000

USD

CY2014

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

150300000

USD

CY2015

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

180500000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

131900000

USD

CY2014

us-gaap

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