$unm 2017 Q2 10-Q

Concept	2017 Q2	2016 Q2
Revenue	$2.822B	$2.761B
YoY Change	2.2%	2.13%
Cost Of Revenue	$1.752B	$1.734B
YoY Change	1.07%	1.8%
Gross Profit	$1.070B	$1.028B
YoY Change	4.11%	2.69%
Gross Profit Margin	37.92%	37.22%
Selling, General & Admin	$215.9M	$202.9M
YoY Change	6.41%	-1.02%
% of Gross Profit	20.18%	19.74%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$138.3M	$126.2M
YoY Change	9.59%	1.69%
% of Gross Profit	12.93%	12.28%
Operating Expenses	$2.421B	$2.379B
YoY Change	1.76%	1.4%
Operating Profit	-$1.351B	-$1.351B
YoY Change	-0.03%	0.44%
Interest Expense	-$39.90M	-$42.40M
YoY Change	-5.9%	11.58%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$361.6M	$340.2M
YoY Change	6.29%	6.38%
Income Tax	$116.5M	$103.4M
% Of Pretax Income	32.22%	30.39%
Net Earnings	$245.1M	$236.8M
YoY Change	3.51%	5.57%
Net Earnings / Revenue	8.69%	8.58%
Basic Earnings Per Share	$1.08	$1.00
Diluted Earnings Per Share	$1.07	$1.00
COMMON SHARES
Basic Shares Outstanding	227.5M shares	236.9M shares
Diluted Shares Outstanding	228.2M shares	237.3M shares

Concept	2017 Q2	2016 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$117.0M	$94.00M
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	$497.1M	$510.9M
YoY Change	-2.7%	-4.63%
Goodwill	$337.1M	$226.7M
YoY Change	48.7%	14.03%
Intangibles
YoY Change
Long-Term Investments	$52.37B	$53.07B
YoY Change	-1.34%	4.1%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$63.38B	$63.85B
YoY Change	-0.74%	3.48%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due		$351.0M
YoY Change		130.92%
Total Short-Term Liabilities	$408.0M	$831.0M
YoY Change	-50.9%	47.86%
LONG-TERM LIABILITIES
Long-Term Debt	$2.968B	$3.043B
YoY Change	-2.46%	17.9%
Other Long-Term Liabilities	$1.668B	$1.459B
YoY Change	14.32%	0.97%
Total Long-Term Liabilities	$4.636B	$4.502B
YoY Change	2.98%	11.82%
TOTAL LIABILITIES
Total Short-Term Liabilities	$408.0M	$831.0M
Total Long-Term Liabilities	$4.636B	$4.502B
Total Liabilities	$54.07B	$54.70B
YoY Change	-1.15%	2.83%
SHAREHOLDERS EQUITY
Retained Earnings	$9.127B	$8.353B
YoY Change	9.26%	9.11%
Common Stock	$2.313B	$2.289B
YoY Change	1.06%	1.03%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.228B	$1.825B
YoY Change	22.1%	29.49%
Treasury Stock Shares	77.98M shares	68.29M shares
Shareholders Equity	$9.317B	$9.157B
YoY Change
Total Liabilities & Shareholders Equity	$63.38B	$63.85B
YoY Change	-0.74%	3.48%

Concept	2017 Q2	2016 Q2
OPERATING ACTIVITIES
Net Income	$245.1M	$236.8M
YoY Change	3.51%	5.57%
Depreciation, Depletion And Amortization	$138.3M	$126.2M
YoY Change	9.59%	1.69%
Cash From Operating Activities	$334.0M	$268.1M
YoY Change	24.58%	-17.84%
INVESTING ACTIVITIES
Capital Expenditures	-$20.50M	-$24.40M
YoY Change	-15.98%	12.44%
Acquisitions
YoY Change
Other Investing Activities	-$131.5M	-$717.6M
YoY Change	-81.68%	636.76%
Cash From Investing Activities	-$152.0M	-$742.0M
YoY Change	-79.51%	523.01%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-172.0M	447.0M
YoY Change	-138.48%	-364.97%
NET CHANGE
Cash From Operating Activities	334.0M	268.1M
Cash From Investing Activities	-152.0M	-742.0M
Cash From Financing Activities	-172.0M	447.0M
Net Change In Cash	10.00M	-26.90M
YoY Change	-137.17%	-169.87%
FREE CASH FLOW
Cash From Operating Activities	$334.0M	$268.1M
Capital Expenditures	-$20.50M	-$24.40M
Free Cash Flow	$354.5M	$292.5M
YoY Change	21.2%	-15.95%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
	dei	Document Period End Date DocumentPeriodEndDate	2017-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000005513
CY2017Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	225682585	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	Unum Group
	dei	Trading Symbol TradingSymbol	UNM
CY2015Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1470300000	USD
CY2016Q1	invest	Derivative Notional Amount DerivativeNotionalAmount	1446300000	USD
CY2016Q2	invest	Derivative Notional Amount DerivativeNotionalAmount	1440500000	USD
CY2016Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1052000000	USD
CY2017Q1	invest	Derivative Notional Amount DerivativeNotionalAmount	1021600000	USD
CY2017Q2	invest	Derivative Notional Amount DerivativeNotionalAmount	1013700000	USD
CY2016Q2	unm	Accident And Health Active Life Reserves AccidentAndHealthActiveLifeReserves	9922300000	USD
CY2017Q2	unm	Accident And Health Active Life Reserves AccidentAndHealthActiveLifeReserves	10393700000	USD
CY2016Q2	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	5800000	USD
	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	11600000	USD
CY2017Q2	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	5800000	USD
	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	11600000	USD
CY2016Q4	unm	Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal	37447800000	USD
CY2017Q2	unm	Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal	37641500000	USD
CY2016Q4	unm	Available For Sale Securities Other Than Temporary Impairments In Accumulated Other Comprehensive Income Loss AvailableForSaleSecuritiesOtherThanTemporaryImpairmentsInAccumulatedOtherComprehensiveIncomeLoss	0	USD
CY2017Q2	unm	Available For Sale Securities Other Than Temporary Impairments In Accumulated Other Comprehensive Income Loss AvailableForSaleSecuritiesOtherThanTemporaryImpairmentsInAccumulatedOtherComprehensiveIncomeLoss	0	USD
CY2016Q2	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	-699200000	USD
	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	-1265200000	USD
CY2017Q2	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	-298100000	USD
	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	-432600000	USD
CY2016Q4	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2016Q2	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	-367600000	USD
	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	-655300000	USD
CY2017Q2	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	162600000	USD
	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	229900000	USD
CY2017Q2	unm	Collateral Requirements Minimum Percentage Collateral To Fair Value Of Securities Loaned Or Purchased Under Repurchase Agreements CollateralRequirementsMinimumPercentageCollateralToFairValueOfSecuritiesLoanedOrPurchasedUnderRepurchaseAgreements	1.02
CY2017Q2	unm	Commitment To Fund Partnership Equity Investments CommitmentToFundPartnershipEquityInvestments	331000000	USD
CY2017Q2	unm	Commitment To Fund Private Placement Fixed Maturity Securities CommitmentToFundPrivatePlacementFixedMaturitySecurities	113200000	USD
CY2017Q2	unm	Committments To Fund Commercial Mortgage Loans CommittmentsToFundCommercialMortgageLoans	66000000	USD
CY2016Q4	unm	Count Of Financing Receivable Recorded Investment Nonaccrual Status CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus	0
CY2017Q2	unm	Count Of Financing Receivable Recorded Investment Nonaccrual Status CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus	0
CY2016Q2	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	3600000	USD
	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	7200000	USD
CY2017Q2	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	3500000	USD
	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	7100000	USD
CY2016Q2	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	7970500000	USD
CY2017Q2	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	8136500000	USD
CY2017Q2	unm	Loan To Value Ratio Maximum LoanToValueRatioMaximum	0.75
	unm	Loan To Value Ratio Update Frequency LoanToValueRatioUpdateFrequency	P3Y
CY2017Q2	unm	Mortage Loan Policy Debt Service Coverage Ratio Lower Range MortageLoanPolicyDebtServiceCoverageRatioLowerRange	1.25
	unm	Mortgage Loan Inspection Frequency MortgageLoanInspectionFrequency	P2Y
	unm	Mortgageloanpolicyamortizationperiod Mortgageloanpolicyamortizationperiod	25
CY2016Q2	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	0	USD
	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	0	USD
CY2017Q2	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	16000000	USD
	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	16000000	USD
CY2016Q2	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	5800000	USD
	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	29800000	USD
CY2017Q2	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	23900000	USD
	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	54300000	USD
	unm	Number Of Changes To Accounting Policy For Estimating Credit Losses On Mortgage Loans NumberOfChangesToAccountingPolicyForEstimatingCreditLossesOnMortgageLoans	0
CY2016Q2	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	2000000	USD
	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	3800000	USD
CY2017Q2	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	1900000	USD
	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	2600000	USD
CY2016Q2	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	400000	USD
	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	700000	USD
CY2017Q2	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	0	USD
	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	200000	USD
	unm	Outstanding Performance Share Unit Awards Grant Price Range Lower Limit OutstandingPerformanceShareUnitAwardsGrantPriceRangeLowerLimit	27.85
	unm	Outstanding Performance Share Unit Awards Grant Price Range Upper Limit OutstandingPerformanceShareUnitAwardsGrantPriceRangeUpperLimit	49.86
	unm	Outstanding Restricted Stock Unit Grant Prices Lower Limit OutstandingRestrictedStockUnitGrantPricesLowerLimit	27.85
	unm	Outstanding Restricted Stock Unit Grant Prices Upper Limit OutstandingRestrictedStockUnitGrantPricesUpperLimit	49.86
CY2017Q2	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2016Q4	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3206100000	USD
CY2017Q2	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3150400000	USD
CY2016Q2	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	100000	USD
	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	100000	USD
CY2017Q2	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	100000	USD
	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	100000	USD
CY2016Q2	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	4600000	USD
	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	9300000	USD
CY2017Q2	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	4700000	USD
	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	9300000	USD
CY2017Q2	unm	Unfunded Commitment To Fund Tax Credit Partnership Investments UnfundedCommitmentToFundTaxCreditPartnershipInvestments	4400000	USD
CY2017Q2	unm	Unfunded Unconditional Commitmentto Fund Private Equity Partnerships UnfundedUnconditionalCommitmenttoFundPrivateEquityPartnerships	200000	USD
CY2016Q2	unm	Unrealized Adjustment To Reserves For Future Policy And Contract Benefits UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits	5578600000	USD
CY2017Q2	unm	Unrealized Adjustment To Reserves For Future Policy And Contract Benefits UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits	4948200000	USD
CY2016Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	693300000	USD
CY2017Q2	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	808600000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-51000000	USD
CY2017Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	104900000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2272800000	USD
CY2017Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2282900000	USD
CY2016Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	500000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	500000	shares
CY2017Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	400000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	400000	shares
CY2016Q4	us-gaap	Assets Assets	61941500000	USD
CY2017Q2	us-gaap	Assets Assets	63381600000	USD
CY2016Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	39552700000	USD
CY2017Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	39626400000	USD
CY2016Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	44217300000	USD
CY2017Q2	us-gaap	Available For Sale Securities AvailableForSaleSecurities	45118600000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	63700000	USD
CY2017Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	69800000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	154900000	USD
CY2017Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	49900000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	4667300000	USD
CY2017Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	2388500000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	801900000	USD
CY2017Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	674300000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	10991600000	USD
CY2017Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	11484500000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6231000000	USD
CY2017Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	5495100000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	18886400000	USD
CY2017Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	18946700000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1338800000	USD
CY2017Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1715200000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	2104900000	USD
CY2017Q2	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	1984900000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	44217300000	USD
CY2017Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	45118600000	USD
CY2016Q2	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	10900000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	27800000	USD
CY2017Q2	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	1900000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	4300000	USD
CY2016Q2	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	4000000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	13600000	USD
CY2017Q2	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	1200000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	2300000	USD
CY2016Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	35200000	USD
CY2017Q2	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	40200000	USD
CY2016Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2421100000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	4842300000	USD
CY2017Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2460400000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	4936600000	USD
CY2015Q4	us-gaap	Cash Cash	112900000	USD
CY2016Q2	us-gaap	Cash Cash	93800000	USD
CY2016Q4	us-gaap	Cash Cash	100400000	USD
CY2017Q2	us-gaap	Cash Cash	117000000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-19100000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	16600000	USD
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	60600000	USD
CY2016Q4	us-gaap	Collateralized Financings CollateralizedFinancings	406000000	USD
CY2017Q2	us-gaap	Collateralized Financings CollateralizedFinancings	404800000	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2017Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	725000000	shares
CY2017Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	725000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	303552934	shares
CY2017Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	304082323	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	30400000	USD
CY2017Q2	us-gaap	Common Stock Value CommonStockValue	30400000	USD
CY2016Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	375900000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	771100000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	349600000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	630900000	USD
CY2016Q2	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	107700000	USD
CY2017Q2	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
CY2016Q2	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-1100000	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-3600000	USD
CY2017Q2	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-300000	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-500000	USD
CY2016Q2	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	12300000	USD
	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	158700000	USD
CY2017Q2	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	105800000	USD
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CY2016Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4300000	USD
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CY2017Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	10700000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	54500000	USD
CY2016Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	126200000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	258400000	USD
CY2017Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	138300000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	279800000	USD
CY2016Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2094200000	USD
CY2017Q2	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2123900000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	40800000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	35500000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	130300000	USD
CY2017Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	247300000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	50600000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	53400000	USD
CY2016Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2017Q2	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed	211200000	USD
CY2017Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed	246900000	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	0	USD
CY2017Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	0	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash	55300000	USD
CY2017Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash	54400000	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	155900000	USD
CY2017Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	192500000	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	211200000	USD
CY2017Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	246900000	USD
CY2016Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability	0	USD
CY2017Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability	0	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	32700000	USD
CY2017Q2	us-gaap	Derivative Assets DerivativeAssets	27000000	USD
CY2016Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	25400000	USD
CY2017Q2	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	21000000	USD
CY2016Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	7300000	USD
CY2017Q2	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	6000000	USD
CY2016Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2017Q2	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	32700000	USD
CY2017Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	27000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	26100000	USD
CY2016Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	99500000	USD
	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	28100000	USD
CY2017Q2	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	13800000	USD
CY2017Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	84500000	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned	82700000	USD
CY2017Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned	86000000	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	15200000	USD
CY2017Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	12000000	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	0	USD
CY2017Q2	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 Collateral Right To Reclaim Cash DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash	0	USD
CY2017Q2	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 Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	67500000	USD
CY2017Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	74000000	USD
CY2016Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	82700000	USD
CY2017Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	86000000	USD
CY2016Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	52800000	USD
CY2017Q2	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	52600000	USD
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CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.08
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CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
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CY2016Q2	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	10200000	USD
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CY2017Q2	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	6200000	USD
	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	14800000	USD
CY2017Q2	us-gaap	Fair Value Concentration Of Risk Derivative Financial Instruments Assets FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets	1100000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	350000000	USD
CY2017Q2	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 Stock FederalHomeLoanBankStock	31600000	USD
CY2017Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	34400000	USD
CY2016Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	200000	USD
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CY2017Q2	us-gaap	Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet	0	USD
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CY2016Q2	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2017Q2	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2016Q2	us-gaap	Gain Loss From Hedged Firm Commitment Not Qualifying As Fair Value Hedge Net GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet	0	USD
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CY2016Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	5300000	USD
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CY2017Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	8100000	USD
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CY2016Q2	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	14700000	USD
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CY2017Q2	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	8100000	USD
	us-gaap	Gain Loss On Investments Excluding Other Than Temporary Impairments GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments	19100000	USD
CY2016Q2	us-gaap	Gain On Cash Flow Hedge Ineffectiveness GainOnCashFlowHedgeIneffectiveness	0	USD
	us-gaap	Gain On Cash Flow Hedge Ineffectiveness GainOnCashFlowHedgeIneffectiveness	0	USD
CY2017Q2	us-gaap	Gain On Cash Flow Hedge Ineffectiveness GainOnCashFlowHedgeIneffectiveness	0	USD
	us-gaap	Gain On Cash Flow Hedge Ineffectiveness GainOnCashFlowHedgeIneffectiveness	0	USD
CY2016Q2	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	0	USD
	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	0	USD
CY2017Q2	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	0	USD
	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	0	USD
CY2016Q4	us-gaap	Goodwill Goodwill	335100000	USD
CY2017Q2	us-gaap	Goodwill Goodwill	337100000	USD
CY2016Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5400000	USD
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CY2017Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	0	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	0	USD
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	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	0	USD
CY2017Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	0	USD
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CY2016Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	3100000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	3100000	USD
CY2017Q2	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
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CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	103400000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	197000000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	116500000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	216900000	USD
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CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	23249500000	USD
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	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	-1200000	USD
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CY2017Q2	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	8100000	USD
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	16900000	USD
CY2016Q2	us-gaap	Investment Tax Credit InvestmentTaxCredit	10400000	USD
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CY2017Q2	us-gaap	Investment Tax Credit InvestmentTaxCredit	10500000	USD
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CY2016Q4	us-gaap	Investments Investments	51130900000	USD
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CY2016Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	202900000	USD
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CY2017Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	215900000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	422900000	USD
CY2017Q2	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	2100000	USD
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CY2016Q2	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	46949800000	USD
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	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	2475800000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	2937900000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	3269700000	USD
CY2015Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	21731500000	USD
CY2016Q2	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	21412100000	USD
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	21085900000	USD
CY2017Q2	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	21063600000	USD
CY2017Q2	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2999400000	USD
CY2017Q2	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	2968400000	USD
CY2016Q4	us-gaap	Marketable Securities Equity Securities MarketableSecuritiesEquitySecurities	1200000	USD
CY2017Q2	us-gaap	Marketable Securities Equity Securities MarketableSecuritiesEquitySecurities	1200000	USD
CY2016Q2	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	9400000	USD
	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	30500000	USD
CY2017Q2	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	0	USD
	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	0	USD
CY2016Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2038900000	USD
CY2017Q2	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2081200000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	272000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-349000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-852500000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-276400000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	561400000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	642000000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	236800000	USD
	us-gaap	Net Income Loss NetIncomeLoss	447400000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	245100000	USD
	us-gaap	Net Income Loss NetIncomeLoss	475000000	USD
CY2016Q2	us-gaap	Net Investment Income NetInvestmentIncome	623300000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	1229700000	USD
CY2017Q2	us-gaap	Net Investment Income NetInvestmentIncome	620500000	USD
CY2016Q4	us-gaap	Other Assets OtherAssets	617300000	USD
CY2017Q2	us-gaap	Other Assets OtherAssets	626500000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	921900000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1722000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	373300000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	550200000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	479900000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	894200000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	206500000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	295500000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	143900000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	325900000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	111600000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	170100000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-8200000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-34400000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-12300000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-23000000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-4400000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-18000000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	6300000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	12300000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-79400000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-105800000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	39800000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	56900000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	139100000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	323700000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	104500000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	155900000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-7100000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1800000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4400000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2000000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-3600000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-1300000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2800000	USD
CY2016Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	207800000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	413400000	USD
CY2017Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	206200000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	437000000	USD
CY2016Q2	us-gaap	Other Income OtherIncome	51100000	USD
	us-gaap	Other Income OtherIncome	103100000	USD
CY2017Q2	us-gaap	Other Income OtherIncome	51200000	USD
	us-gaap	Other Income OtherIncome	101400000	USD
CY2016Q4	us-gaap	Other Liabilities OtherLiabilities	1675900000	USD
CY2017Q2	us-gaap	Other Liabilities OtherLiabilities	1668000000	USD
CY2016Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	631500000	USD
CY2017Q2	us-gaap	Other Long Term Investments OtherLongTermInvestments	661300000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-13500000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	400000	USD
CY2016Q4	us-gaap	Other Policyholder Funds OtherPolicyholderFunds	1623800000	USD
CY2017Q2	us-gaap	Other Policyholder Funds OtherPolicyholderFunds	1627500000	USD
CY2016Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	780000000	USD
CY2017Q2	us-gaap	Other Short Term Investments OtherShortTermInvestments	1120800000	USD
CY2016Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	9400000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	30500000	USD
CY2017Q2	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	3257300000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	3292000000	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	604200000	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	330300000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	208900000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	207000000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	89400000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	92300000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1741100000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1384600000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	259000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	179900000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	41600000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	47800000	USD
CY2016Q2	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1733500000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	3463300000	USD
CY2017Q2	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1752000000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	3501000000	USD
CY2017Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2017Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2017Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2016Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1610800000	USD
CY2017Q2	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1629100000	USD
CY2016Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	2081600000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	4169100000	USD
CY2017Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	2142200000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	4285100000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2700000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1500000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	609100000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	917200000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1288400000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-17500000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-17700000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	166700000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	106800000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	674700000	USD

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

dei

Amendment Flag

AmendmentFlag

false

dei

Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

dei

Document Fiscal Period Focus

DocumentFiscalPeriodFocus

Q2

dei

Document Fiscal Year Focus

DocumentFiscalYearFocus

2017

dei

Document Period End Date

DocumentPeriodEndDate

2017-06-30

dei

Document Type

DocumentType

10-Q

dei

Entity Central Index Key

EntityCentralIndexKey

0000005513

CY2017Q3

dei

Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

225682585

shares

dei

Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

dei

Entity Registrant Name

EntityRegistrantName

Unum Group

dei

Trading Symbol

TradingSymbol

UNM

CY2015Q4

invest

Derivative Notional Amount

DerivativeNotionalAmount

1470300000

USD

CY2016Q1

invest

Derivative Notional Amount

DerivativeNotionalAmount

1446300000

USD

CY2016Q2

invest

Derivative Notional Amount

DerivativeNotionalAmount

1440500000

USD

CY2016Q4

invest

Derivative Notional Amount

DerivativeNotionalAmount

1052000000

USD

CY2017Q1

invest

Derivative Notional Amount

DerivativeNotionalAmount

1021600000

USD

CY2017Q2

invest

Derivative Notional Amount

DerivativeNotionalAmount

1013700000

USD

CY2016Q2

unm

Accident And Health Active Life Reserves

AccidentAndHealthActiveLifeReserves

9922300000

USD

CY2017Q2

unm

Accident And Health Active Life Reserves

AccidentAndHealthActiveLifeReserves

10393700000

USD

CY2016Q2

unm

Amortizationof Low Income Housing Investments

AmortizationofLowIncomeHousingInvestments

5800000

USD

unm

Amortizationof Low Income Housing Investments

AmortizationofLowIncomeHousingInvestments

11600000

USD

CY2017Q2

unm

Amortizationof Low Income Housing Investments

AmortizationofLowIncomeHousingInvestments

5800000

USD

unm

Amortizationof Low Income Housing Investments

AmortizationofLowIncomeHousingInvestments

11600000

USD

CY2016Q4

unm

Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal

AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal

37447800000

USD

CY2017Q2

unm

Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal

AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal

37641500000

USD

CY2016Q4

unm

Available For Sale Securities Other Than Temporary Impairments In Accumulated Other Comprehensive Income Loss

AvailableForSaleSecuritiesOtherThanTemporaryImpairmentsInAccumulatedOtherComprehensiveIncomeLoss

0

USD

CY2017Q2

unm

Available For Sale Securities Other Than Temporary Impairments In Accumulated Other Comprehensive Income Loss

AvailableForSaleSecuritiesOtherThanTemporaryImpairmentsInAccumulatedOtherComprehensiveIncomeLoss

0

USD

CY2016Q2

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

-699200000

USD

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

-1265200000

USD

CY2017Q2

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

-298100000

USD

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

-432600000

USD

CY2016Q4

unm

Percentage Of Loan Portfolio

PercentageOfLoanPortfolio

1.000

CY2016Q2

unm

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

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

-367600000

USD

unm

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

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

-655300000

USD

CY2017Q2

unm

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

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

162600000

USD

unm

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

ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense

229900000

USD

CY2017Q2

unm

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

CollateralRequirementsMinimumPercentageCollateralToFairValueOfSecuritiesLoanedOrPurchasedUnderRepurchaseAgreements

1.02

CY2017Q2

unm

Commitment To Fund Partnership Equity Investments

CommitmentToFundPartnershipEquityInvestments

331000000

USD

CY2017Q2

unm

Commitment To Fund Private Placement Fixed Maturity Securities

CommitmentToFundPrivatePlacementFixedMaturitySecurities

113200000

USD

CY2017Q2

unm

Committments To Fund Commercial Mortgage Loans

CommittmentsToFundCommercialMortgageLoans

66000000

USD

CY2016Q4

unm

Count Of Financing Receivable Recorded Investment Nonaccrual Status

CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus

0

CY2017Q2

unm

Count Of Financing Receivable Recorded Investment Nonaccrual Status

CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus

0

CY2016Q2

unm

Investment Income On Pfa Assets

InvestmentIncomeOnPfaAssets

3600000

USD

unm

Investment Income On Pfa Assets

InvestmentIncomeOnPfaAssets

7200000

USD

CY2017Q2

unm

Investment Income On Pfa Assets

InvestmentIncomeOnPfaAssets

3500000

USD

unm

Investment Income On Pfa Assets

InvestmentIncomeOnPfaAssets

7100000

USD

CY2016Q2

unm

Life Reserves For Future Policy And Contract Benefits

LifeReservesForFuturePolicyAndContractBenefits

7970500000

USD

CY2017Q2

unm

Life Reserves For Future Policy And Contract Benefits

LifeReservesForFuturePolicyAndContractBenefits

8136500000

USD

CY2017Q2

unm

Loan To Value Ratio Maximum

LoanToValueRatioMaximum

0.75

unm

Loan To Value Ratio Update Frequency

LoanToValueRatioUpdateFrequency

P3Y

CY2017Q2

unm

Mortage Loan Policy Debt Service Coverage Ratio Lower Range

MortageLoanPolicyDebtServiceCoverageRatioLowerRange

1.25

unm

Mortgage Loan Inspection Frequency

MortgageLoanInspectionFrequency

P2Y

unm

Mortgageloanpolicyamortizationperiod

25

CY2016Q2

unm

Notional Amount Of Derivatives Additions

NotionalAmountOfDerivativesAdditions

0

USD

unm

Notional Amount Of Derivatives Additions

NotionalAmountOfDerivativesAdditions

0

USD

CY2017Q2

unm

Notional Amount Of Derivatives Additions

NotionalAmountOfDerivativesAdditions

16000000

USD

unm

Notional Amount Of Derivatives Additions

NotionalAmountOfDerivativesAdditions

16000000

USD

CY2016Q2

unm

Notional Amount Of Derivatives Terminations

NotionalAmountOfDerivativesTerminations

5800000

USD

unm

Notional Amount Of Derivatives Terminations

NotionalAmountOfDerivativesTerminations

29800000

USD

CY2017Q2

unm

Notional Amount Of Derivatives Terminations

NotionalAmountOfDerivativesTerminations

23900000

USD

unm

Notional Amount Of Derivatives Terminations

NotionalAmountOfDerivativesTerminations

54300000

USD

unm

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

NumberOfChangesToAccountingPolicyForEstimatingCreditLossesOnMortgageLoans

0

CY2016Q2

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

2000000

USD

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

3800000

USD

CY2017Q2

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

1900000

USD

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

2600000

USD

CY2016Q2

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

400000

USD

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

700000

USD

CY2017Q2

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

0

USD

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

200000

USD

unm

Outstanding Performance Share Unit Awards Grant Price Range Lower Limit

OutstandingPerformanceShareUnitAwardsGrantPriceRangeLowerLimit

27.85

unm

Outstanding Performance Share Unit Awards Grant Price Range Upper Limit

OutstandingPerformanceShareUnitAwardsGrantPriceRangeUpperLimit

49.86

unm

Outstanding Restricted Stock Unit Grant Prices Lower Limit

OutstandingRestrictedStockUnitGrantPricesLowerLimit

27.85

unm

Outstanding Restricted Stock Unit Grant Prices Upper Limit

OutstandingRestrictedStockUnitGrantPricesUpperLimit

49.86

CY2017Q2

unm

Percentage Of Loan Portfolio

PercentageOfLoanPortfolio

1.000

CY2016Q4

unm

Policy Loans Cededto Reinsurers

PolicyLoansCededtoReinsurers

3206100000

USD

CY2017Q2

unm

Policy Loans Cededto Reinsurers

PolicyLoansCededtoReinsurers

3150400000

USD

CY2016Q2

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

100000

USD

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

100000

USD

CY2017Q2

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

100000

USD

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

100000

USD

CY2016Q2

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

4600000

USD

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

9300000

USD

CY2017Q2

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

4700000

USD

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

9300000

USD

CY2017Q2

unm

Unfunded Commitment To Fund Tax Credit Partnership Investments

UnfundedCommitmentToFundTaxCreditPartnershipInvestments

4400000

USD

CY2017Q2

unm

Unfunded Unconditional Commitmentto Fund Private Equity Partnerships

UnfundedUnconditionalCommitmenttoFundPrivateEquityPartnerships

200000

USD

CY2016Q2

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

5578600000

USD

CY2017Q2

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

4948200000

USD

CY2016Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

693300000

USD

CY2017Q2

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

808600000

USD

CY2016Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-51000000

USD

CY2017Q2

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

104900000

USD

CY2016Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

2272800000

USD

CY2017Q2

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

2282900000

USD

CY2016Q2

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

500000

shares

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

500000

shares

CY2017Q2

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

400000

shares

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

400000

shares

CY2016Q4

us-gaap

Assets

61941500000

USD

CY2017Q2

us-gaap

Assets

63381600000

USD

CY2016Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

39552700000

USD

CY2017Q2

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

39626400000

USD

CY2016Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

44217300000

USD

CY2017Q2

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

45118600000

USD

CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

63700000

USD

CY2017Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

69800000

USD

CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

154900000

USD

CY2017Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

49900000

USD

CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

4667300000

USD

CY2017Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

2388500000

USD

CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

801900000

USD

CY2017Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

674300000

USD

CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

10991600000

USD

CY2017Q2

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

11484500000

USD

CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

6231000000

USD

CY2017Q2

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

5495100000

USD

CY2016Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

18886400000

USD

CY2017Q2

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

18946700000

USD

CY2016Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

1338800000

USD

CY2017Q2

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

1715200000

USD

CY2016Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

2104900000

USD

CY2017Q2

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

1984900000

USD

CY2016Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

44217300000

USD

CY2017Q2

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

45118600000

USD

CY2016Q2

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

10900000

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

27800000

USD

CY2017Q2

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

1900000

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

4300000

USD

CY2016Q2

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

4000000

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

13600000

USD

CY2017Q2

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

1200000

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

2300000

USD

CY2016Q4

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

35200000

USD

CY2017Q2

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

40200000

USD

CY2016Q2

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2421100000

USD

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

4842300000

USD

CY2017Q2

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2460400000

USD

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

4936600000

USD

CY2015Q4

us-gaap

Cash

112900000

USD

CY2016Q2

us-gaap

Cash

93800000

USD

CY2016Q4

us-gaap

Cash

100400000

USD

CY2017Q2

us-gaap

Cash

117000000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-19100000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

16600000

USD

us-gaap

Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months

CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

60600000

USD

CY2016Q4

us-gaap

Collateralized Financings

CollateralizedFinancings

406000000

USD

CY2017Q2

us-gaap

Collateralized Financings

CollateralizedFinancings

404800000

USD

CY2016Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2017Q2

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2016Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.10

CY2017Q2

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.10

CY2016Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

725000000

shares

CY2017Q2

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

725000000

shares

CY2016Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

303552934

shares

CY2017Q2

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

304082323

shares

CY2016Q4

us-gaap

Common Stock Value

CommonStockValue

30400000

USD

CY2017Q2

us-gaap

Common Stock Value

CommonStockValue

30400000

USD

CY2016Q2

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

375900000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

771100000

USD

CY2017Q2

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

349600000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

630900000

USD

CY2016Q2

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

107700000

USD

CY2017Q2

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

0

USD

CY2016Q2

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-1100000

USD

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-3600000

USD

CY2017Q2

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-300000

USD

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-500000

USD

CY2016Q2

us-gaap

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

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

12300000

USD

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

158700000

USD

CY2017Q2

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

105800000

USD

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

162400000

USD

CY2016Q2

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-4300000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

38300000

USD

CY2017Q2

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

10700000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

54500000

USD

CY2016Q2

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

126200000

USD

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

258400000

USD

CY2017Q2

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

138300000

USD

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

279800000

USD

CY2016Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

2094200000

USD

CY2017Q2

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

2123900000

USD

us-gaap

Deferred Policy Acquisition Costs Period Increase Decrease

DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease

40800000

USD

us-gaap

Deferred Policy Acquisition Costs Period Increase Decrease

DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease

35500000

USD

CY2016Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

130300000

USD

CY2017Q2

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

247300000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

50600000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

53400000

USD

CY2016Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

0

USD

CY2017Q2

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

0

USD

CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed

211200000

USD

CY2017Q2

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed

246900000

USD

CY2016Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral

0

USD

CY2017Q2

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral

0

USD

CY2016Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash

55300000

USD

CY2017Q2

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash

54400000

USD

CY2016Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities

155900000

USD

CY2017Q2

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities

192500000

USD

CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross

211200000

USD

CY2017Q2

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross

246900000

USD

CY2016Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability

0

USD

CY2017Q2

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability

0

USD

CY2016Q4

us-gaap

Derivative Assets

DerivativeAssets

32700000

USD

CY2017Q2

us-gaap

Derivative Assets

DerivativeAssets

27000000

USD

CY2016Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

25400000

USD

CY2017Q2

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

21000000

USD

CY2016Q4

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

7300000

USD

CY2017Q2

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

6000000

USD

CY2016Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

0

USD

CY2017Q2

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

0

USD

CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

32700000

USD

CY2017Q2

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

27000000

USD

CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

0

USD

us-gaap

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

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

26100000

USD

CY2016Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

99500000

USD

us-gaap

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

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

28100000

USD

CY2017Q2

us-gaap

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

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

13800000

USD

CY2017Q2

us-gaap

Derivative Liabilities

DerivativeLiabilities

84500000

USD

CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned

82700000

USD

CY2017Q2

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned

86000000

USD

CY2016Q4

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral

15200000

USD

CY2017Q2

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral

12000000

USD

CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset

0

USD

CY2017Q2

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 Collateral Right To Reclaim Cash

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash

0

USD

CY2017Q2

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 Securities

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities

67500000

USD

CY2017Q2

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities

74000000

USD

CY2016Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross

82700000

USD

CY2017Q2

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross

86000000

USD

CY2016Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

52800000

USD

CY2017Q2

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

52600000

USD

CY2016Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.00

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.88

CY2017Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.08

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

2.08

CY2016Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.00

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.87

CY2017Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.07

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

2.07

CY2016Q2

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

10200000

USD

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

4600000

USD

CY2017Q2

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

6200000

USD

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

14800000

USD

CY2017Q2

us-gaap

Fair Value Concentration Of Risk Derivative Financial Instruments Assets

FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets

1100000

USD

CY2016Q4

us-gaap

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

FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch

350000000

USD

CY2017Q2

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 Stock

FederalHomeLoanBankStock

31600000

USD

CY2017Q2

us-gaap

Federal Home Loan Bank Stock

FederalHomeLoanBankStock

34400000

USD

CY2016Q2

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

200000

USD

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

100000

USD

CY2017Q2

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-400000

USD

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

400000

USD

CY2016Q2

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

CY2017Q2

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

CY2016Q2

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

CY2017Q2

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

CY2016Q2

us-gaap

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

GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet

0

USD

us-gaap

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

GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet

0

USD

CY2017Q2

us-gaap

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

GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet

0

USD

us-gaap

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

GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet

0

USD

CY2016Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

5300000

USD

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-15200000

USD

CY2017Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

8100000

USD

us-gaap

Gain Loss On Investments

GainLossOnInvestments

19100000

USD

CY2016Q2

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

14700000

USD

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

15300000

USD

CY2017Q2

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

8100000

USD

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

19100000

USD

CY2016Q2

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2017Q2

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2016Q2

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2017Q2

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2016Q4

us-gaap

Goodwill

335100000

USD

CY2017Q2

us-gaap

Goodwill

337100000

USD

CY2016Q2

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

5400000

USD

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

2700000

USD

CY2017Q2

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

0

USD

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

0

USD

CY2016Q2

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

0

USD

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

0

USD

CY2017Q2

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

0

USD

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

0

USD

CY2016Q2

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

3100000

USD

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

3100000

USD

CY2017Q2

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

0

USD

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

0

USD

CY2016Q2

us-gaap

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

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

340200000

USD

us-gaap

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

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

644400000

USD

CY2017Q2

us-gaap

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

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

361600000

USD

us-gaap

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

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

691900000

USD

CY2016Q2

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

103400000

USD

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

197000000

USD

CY2017Q2

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

116500000

USD

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

216900000

USD

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

44500000

USD

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

55700000

USD

us-gaap

Increase Decrease In Accrued Investment Income Receivable

IncreaseDecreaseInAccruedInvestmentIncomeReceivable

190500000

USD

us-gaap

Increase Decrease In Accrued Investment Income Receivable

IncreaseDecreaseInAccruedInvestmentIncomeReceivable

213400000

USD

CY2016Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

23249500000

USD

us-gaap

Increase Decrease In Cash Collateral For Loaned Securities

IncreaseDecreaseInCashCollateralForLoanedSecurities

34800000

USD

us-gaap

Increase Decrease In Cash Collateral For Loaned Securities

IncreaseDecreaseInCashCollateralForLoanedSecurities

-1200000

USD

CY2016Q2

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

146700000

USD

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

299200000

USD

CY2017Q2

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

153200000

USD

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

315300000

USD

us-gaap

Increase Decrease In Insurance Liabilities

IncreaseDecreaseInInsuranceLiabilities

211000000

USD

us-gaap

Increase Decrease In Insurance Liabilities

IncreaseDecreaseInInsuranceLiabilities

244100000

USD

us-gaap

Increase Decrease In Other Accrued Liabilities

IncreaseDecreaseInOtherAccruedLiabilities

-37600000

USD

us-gaap

Increase Decrease In Other Accrued Liabilities

IncreaseDecreaseInOtherAccruedLiabilities

-12600000

USD

us-gaap

Increase Decrease In Receivables

IncreaseDecreaseInReceivables

-48100000

USD

us-gaap

Increase Decrease In Receivables

IncreaseDecreaseInReceivables

-94800000

USD

CY2016Q2

us-gaap

Insurance Commissions

InsuranceCommissions

255000000

USD

us-gaap

Insurance Commissions

InsuranceCommissions

514900000

USD

CY2017Q2

us-gaap

Insurance Commissions

InsuranceCommissions

261300000

USD

us-gaap

Insurance Commissions

InsuranceCommissions

531500000

USD

CY2016Q2

us-gaap

Interest And Debt Expense

InterestAndDebtExpense

42400000

USD

us-gaap

Interest And Debt Expense

InterestAndDebtExpense

81000000

USD

CY2017Q2

us-gaap

Interest And Debt Expense

InterestAndDebtExpense

39900000

USD

us-gaap

Interest And Debt Expense

InterestAndDebtExpense

79700000

USD

CY2016Q2

us-gaap

Investment Income Interest And Dividend

InvestmentIncomeInterestAndDividend

634800000

USD

us-gaap

Investment Income Interest And Dividend

InvestmentIncomeInterestAndDividend

1253000000

USD

CY2017Q2

us-gaap

Investment Income Interest And Dividend

InvestmentIncomeInterestAndDividend

632100000

USD

us-gaap

Investment Income Interest And Dividend

InvestmentIncomeInterestAndDividend

1246900000

USD

CY2016Q2

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

7900000

USD

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

16100000

USD

CY2017Q2

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

8100000

USD

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

16900000

USD

CY2016Q2

us-gaap

Investment Tax Credit

InvestmentTaxCredit

10400000

USD

us-gaap

Investment Tax Credit

InvestmentTaxCredit

20900000

USD

CY2017Q2

us-gaap

Investment Tax Credit

InvestmentTaxCredit

10500000

USD

us-gaap

Investment Tax Credit

InvestmentTaxCredit

20900000

USD

CY2016Q4

us-gaap

Investments

51130900000

USD

CY2017Q2

us-gaap

Investments

52391700000

USD

CY2016Q2

us-gaap

Labor And Related Expense

LaborAndRelatedExpense

202900000

USD

us-gaap

Labor And Related Expense

LaborAndRelatedExpense

410500000

USD

CY2017Q2

us-gaap

Labor And Related Expense

LaborAndRelatedExpense

215900000

USD

us-gaap

Labor And Related Expense

LaborAndRelatedExpense

422900000

USD

CY2017Q2

us-gaap

Letters Of Credit Outstanding Amount

LettersOfCreditOutstandingAmount

2100000

USD

CY2016Q4

us-gaap

Liabilities

52973500000

USD

CY2017Q2

us-gaap

Liabilities

54065000000

USD

CY2016Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

61941500000

USD

CY2017Q2

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

63381600000

USD

CY2015Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

23796100000

USD

CY2016Q2

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

23478400000

USD

CY2017Q2

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

23210200000

USD

CY2016Q2

us-gaap

Liability For Claims And Claims Adjustment Expense Disability Accident And Health

LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth

1486400000

USD

us-gaap

Net Investment Income

NetInvestmentIncome

1222900000

USD

us-gaap

Number Of Operating Segments

NumberOfOperatingSegments

3

Integer

CY2016Q4

us-gaap

Liability For Claims And Claims Adjustment Expense Disability Accident And Health

LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth

1507900000

USD

CY2017Q2

us-gaap

Liability For Claims And Claims Adjustment Expense Disability Accident And Health

LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth

1552500000

USD

CY2016Q2

us-gaap

Liability For Future Policy Benefits

LiabilityForFuturePolicyBenefits

46949800000

USD

CY2017Q2

us-gaap

Liability For Future Policy Benefits

LiabilityForFuturePolicyBenefits

46688600000

USD

CY2016Q2

us-gaap

Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense

LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense

45463400000

USD

CY2016Q4

us-gaap

Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense

LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense

44245900000

USD

CY2017Q2

us-gaap

Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense

LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense

45136100000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

767100000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

816200000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

2490200000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

2475800000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

2937900000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

3269700000

USD

CY2015Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

21731500000

USD

CY2016Q2

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

21412100000

USD

CY2016Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

21085900000

USD

CY2017Q2

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

21063600000

USD

CY2017Q2

us-gaap

Line Of Credit

LineOfCredit

0

USD

CY2016Q4

us-gaap

Long Term Debt And Capital Lease Obligations

LongTermDebtAndCapitalLeaseObligations

2999400000

USD

CY2017Q2

us-gaap

Long Term Debt And Capital Lease Obligations

LongTermDebtAndCapitalLeaseObligations

2968400000

USD

CY2016Q4

us-gaap

Marketable Securities Equity Securities

MarketableSecuritiesEquitySecurities

1200000

USD

CY2017Q2

us-gaap

Marketable Securities Equity Securities

MarketableSecuritiesEquitySecurities

1200000

USD

CY2016Q2

us-gaap

Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount

MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount

9400000

USD

us-gaap

Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount

MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount

30500000

USD

CY2017Q2

us-gaap

Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount

MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount

0

USD

us-gaap

Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount

MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount

0

USD

CY2016Q4

us-gaap

Mortgage Loans On Real Estate Commercial And Consumer Net

MortgageLoansOnRealEstateCommercialAndConsumerNet

2038900000

USD

CY2017Q2

us-gaap

Mortgage Loans On Real Estate Commercial And Consumer Net

MortgageLoansOnRealEstateCommercialAndConsumerNet

2081200000

USD

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

272000000

USD

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-349000000

USD

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-852500000

USD

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-276400000

USD

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

561400000

USD

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

642000000

USD

CY2016Q2

us-gaap

Net Income Loss

NetIncomeLoss

236800000

USD

us-gaap

Net Income Loss

NetIncomeLoss

447400000

USD

CY2017Q2

us-gaap

Net Income Loss

NetIncomeLoss

245100000

USD

us-gaap

Net Income Loss

NetIncomeLoss

475000000

USD

CY2016Q2

us-gaap

Net Investment Income

NetInvestmentIncome

623300000

USD

us-gaap

Net Investment Income

NetInvestmentIncome

1229700000

USD

CY2017Q2

us-gaap

Net Investment Income

NetInvestmentIncome

620500000

USD

CY2016Q4

us-gaap

Other Assets

OtherAssets

617300000

USD

CY2017Q2

us-gaap

Other Assets

OtherAssets

626500000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

921900000

USD

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

1722000000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

373300000

USD

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

550200000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

479900000

USD

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

894200000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

206500000

USD

us-gaap

Other Comprehensive Income Loss Available For Sale Securities Tax

OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

295500000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

143900000

USD

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

325900000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

111600000

USD

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

170100000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

-8200000

USD

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

-34400000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

-12300000

USD

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

-23000000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

-4400000

USD

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

-18000000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

6300000

USD

us-gaap

Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax

OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

12300000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-79400000

USD

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-105800000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

39800000

USD

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

56900000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax

OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

0

USD

us-gaap

Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax

OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

0

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax

OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

0

USD

us-gaap

Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax

OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

0

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

139100000

USD

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

323700000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

104500000

USD

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

155900000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

-4000000

USD

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

-7100000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

-1800000

USD

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

-4400000

USD

CY2016Q2

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

-2000000

USD

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

-3600000

USD

CY2017Q2

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

-1300000

USD

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

-2800000

USD

CY2016Q2

us-gaap

Other Cost And Expense Operating

OtherCostAndExpenseOperating

207800000

USD

us-gaap

Other Cost And Expense Operating

OtherCostAndExpenseOperating

413400000

USD

CY2017Q2

us-gaap

Other Cost And Expense Operating

OtherCostAndExpenseOperating

206200000

USD

us-gaap

Other Cost And Expense Operating

OtherCostAndExpenseOperating

437000000

USD

CY2016Q2

us-gaap

Other Income

OtherIncome

51100000

USD

us-gaap

Other Income

OtherIncome

103100000

USD

CY2017Q2

us-gaap

Other Income

OtherIncome

51200000

USD

us-gaap

Other Income

OtherIncome

101400000

USD

CY2016Q4

us-gaap

Other Liabilities

OtherLiabilities

1675900000

USD

CY2017Q2

us-gaap

Other Liabilities

OtherLiabilities

1668000000

USD

CY2016Q4

us-gaap

Other Long Term Investments

OtherLongTermInvestments

631500000

USD

CY2017Q2

us-gaap

Other Long Term Investments

OtherLongTermInvestments

661300000

USD

us-gaap

Other Noncash Income Expense

OtherNoncashIncomeExpense

-13500000

USD

us-gaap

Other Noncash Income Expense

OtherNoncashIncomeExpense

400000

USD

CY2016Q4

us-gaap

Other Policyholder Funds

OtherPolicyholderFunds

1623800000

USD

CY2017Q2

us-gaap

Other Policyholder Funds

OtherPolicyholderFunds

1627500000

USD

CY2016Q4

us-gaap

Other Short Term Investments

OtherShortTermInvestments

780000000

USD

CY2017Q2

us-gaap

Other Short Term Investments

OtherShortTermInvestments

1120800000

USD

CY2016Q2

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

9400000

USD

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

30500000

USD

CY2017Q2

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

0

USD

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

0

USD

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

3257300000

USD

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

3292000000

USD

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

604200000

USD

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

330300000

USD

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

208900000

USD

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

207000000

USD

us-gaap

Payments Of Dividends

PaymentsOfDividends

89400000

USD

us-gaap

Payments Of Dividends

PaymentsOfDividends

92300000

USD

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

1741100000

USD

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

1384600000

USD

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

259000000

USD

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

179900000

USD

us-gaap

Payments To Acquire Property Plant And Equipment

PaymentsToAcquirePropertyPlantAndEquipment

41600000

USD

us-gaap

Payments To Acquire Property Plant And Equipment

PaymentsToAcquirePropertyPlantAndEquipment

47800000

USD

CY2016Q2

us-gaap

Policyholder Benefits And Claims Incurred Net

PolicyholderBenefitsAndClaimsIncurredNet

1733500000

USD

us-gaap

Policyholder Benefits And Claims Incurred Net

PolicyholderBenefitsAndClaimsIncurredNet

3463300000

USD

CY2017Q2

us-gaap

Policyholder Benefits And Claims Incurred Net

PolicyholderBenefitsAndClaimsIncurredNet

1752000000

USD

us-gaap

Policyholder Benefits And Claims Incurred Net

PolicyholderBenefitsAndClaimsIncurredNet

3501000000

USD

CY2017Q2

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.10

CY2017Q2

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

25000000

shares

CY2017Q2

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Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2016Q4

us-gaap

Premiums And Other Receivables Net

PremiumsAndOtherReceivablesNet

1610800000

USD

CY2017Q2

us-gaap

Premiums And Other Receivables Net

PremiumsAndOtherReceivablesNet

1629100000

USD

CY2016Q2

us-gaap

Premiums Earned Net

PremiumsEarnedNet

2081600000

USD

us-gaap

Premiums Earned Net

PremiumsEarnedNet

4169100000

USD

CY2017Q2

us-gaap

Premiums Earned Net

PremiumsEarnedNet

2142200000

USD

us-gaap

Premiums Earned Net

PremiumsEarnedNet

4285100000

USD

us-gaap

Proceeds From Issuance Of Common Stock

ProceedsFromIssuanceOfCommonStock

2700000

USD

us-gaap

Proceeds From Issuance Of Common Stock

ProceedsFromIssuanceOfCommonStock

1500000

USD

us-gaap

Proceeds From Issuance Of Long Term Debt

ProceedsFromIssuanceOfLongTermDebt

0

USD

us-gaap

Proceeds From Issuance Of Long Term Debt

ProceedsFromIssuanceOfLongTermDebt

609100000

USD

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

917200000

USD

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

1288400000

USD

us-gaap

Proceeds From Payments For Other Financing Activities

ProceedsFromPaymentsForOtherFinancingActivities

-17500000

USD

us-gaap

Proceeds From Payments For Other Financing Activities

ProceedsFromPaymentsForOtherFinancingActivities

-17700000

USD

us-gaap

Proceeds From Sale And Maturity Of Other Investments

ProceedsFromSaleAndMaturityOfOtherInvestments

166700000

USD

us-gaap

Proceeds From Sale And Maturity Of Other Investments

ProceedsFromSaleAndMaturityOfOtherInvestments

106800000

USD

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

674700000

USD

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

272200000

USD

CY2016Q4

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

500600000

USD

CY2017Q2

us-gaap

Property Plant And Equipment Net

PropertyPlantAndEquipmentNet

497100000

USD

CY2016Q2

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

4800000

USD

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

2200000

USD

CY2017Q2

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

7100000

USD

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

14200000

USD

CY2015Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2064600000

USD

CY2016Q2

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2066300000

USD

CY2016Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2163600000

USD

CY2017Q2

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

2146600000

USD

CY2016Q4

us-gaap

Reinsurance Recoverables

ReinsuranceRecoverables

4858900000

USD

CY2017Q2

us-gaap

Reinsurance Recoverables

ReinsuranceRecoverables

4850600000

USD

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

24000000

USD

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

33500000

USD

us-gaap

Repurchase Agreements Maturities

RepurchaseAgreementsMaturities

30 days

CY2016Q4

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

8744000000

USD

CY2017Q2

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

9126700000

USD

CY2016Q2

us-gaap

Revenues

2761300000

USD

us-gaap

Revenues

5486700000

USD

CY2017Q2

us-gaap

Revenues

2822000000

USD

us-gaap

Revenues

5628500000

USD

CY2016Q4

us-gaap

Securities Borrowed

SecuritiesBorrowed

178500000

USD

CY2017Q2

us-gaap

Securities Borrowed

SecuritiesBorrowed

219900000

USD

CY2016Q4

us-gaap

Securities Borrowed Amount Offset Against Collateral

SecuritiesBorrowedAmountOffsetAgainstCollateral

0

USD

CY2017Q2

us-gaap

Securities Borrowed Amount Offset Against Collateral

SecuritiesBorrowedAmountOffsetAgainstCollateral

0

USD

CY2016Q4

us-gaap

Securities Borrowed Collateral Obligation To Return Cash

SecuritiesBorrowedCollateralObligationToReturnCash

29900000

USD

CY2017Q2

us-gaap

Securities Borrowed Collateral Obligation To Return Cash

SecuritiesBorrowedCollateralObligationToReturnCash

33400000

USD

CY2016Q4

us-gaap

Securities Borrowed Collateral Obligation To Return Securities

SecuritiesBorrowedCollateralObligationToReturnSecurities

148600000

USD

CY2017Q2

us-gaap

Securities Borrowed Collateral Obligation To Return Securities

SecuritiesBorrowedCollateralObligationToReturnSecurities

186500000

USD

CY2016Q4

us-gaap

Securities Borrowed Gross

SecuritiesBorrowedGross

178500000

USD

CY2017Q2

us-gaap

Securities Borrowed Gross

SecuritiesBorrowedGross

219900000

USD

CY2016Q4

us-gaap

Securities Borrowed Liability

SecuritiesBorrowedLiability

0

USD

CY2017Q2

us-gaap

Securities Borrowed Liability

SecuritiesBorrowedLiability

0

USD

CY2016Q4

us-gaap

Securities Loaned

SecuritiesLoaned

29900000

USD

CY2017Q2

us-gaap

Securities Loaned

SecuritiesLoaned

33400000

USD

CY2016Q4

us-gaap

Securities Loaned Amount Offset Against Collateral

SecuritiesLoanedAmountOffsetAgainstCollateral

0

USD

CY2017Q2

us-gaap

Securities Loaned Amount Offset Against Collateral

SecuritiesLoanedAmountOffsetAgainstCollateral

0

USD

CY2016Q4

us-gaap

Securities Loaned Asset

SecuritiesLoanedAsset

0

USD

CY2017Q2

us-gaap

Securities Loaned Asset

SecuritiesLoanedAsset

0

USD

CY2016Q4

us-gaap

Securities Loaned Collateral Right To Reclaim Cash

SecuritiesLoanedCollateralRightToReclaimCash

0

USD

CY2017Q2

us-gaap

Securities Loaned Collateral Right To Reclaim Cash

SecuritiesLoanedCollateralRightToReclaimCash

0

USD

CY2016Q4

us-gaap

Securities Loaned Collateral Right To Reclaim Securities

SecuritiesLoanedCollateralRightToReclaimSecurities

29900000

USD

CY2017Q2

us-gaap

Securities Loaned Collateral Right To Reclaim Securities

SecuritiesLoanedCollateralRightToReclaimSecurities

33400000

USD

CY2016Q4

us-gaap

Securities Loaned Gross

SecuritiesLoanedGross

29900000

USD

CY2017Q2

us-gaap

Securities Loaned Gross

SecuritiesLoanedGross

33400000

USD

CY2016Q4

us-gaap

Securities Sold Under Agreements To Repurchase

SecuritiesSoldUnderAgreementsToRepurchase

0

USD

CY2017Q2

us-gaap

Securities Sold Under Agreements To Repurchase

SecuritiesSoldUnderAgreementsToRepurchase

0

USD

us-gaap

Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit

ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit

20.78

us-gaap

Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit

ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit

26.29

CY2016Q2

us-gaap

Stockholders Equity

StockholdersEquity

9157000000

USD

CY2016Q4

us-gaap

Stockholders Equity

StockholdersEquity

8968000000

USD

CY2017Q2

us-gaap

Stockholders Equity

StockholdersEquity

9316600000

USD

CY2015Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest