$unm 2014 Q4 10-K

Concept	2014 Q4	2014 Q3	2014 Q2
Revenue	$2.639B	$2.614B	$2.657B
YoY Change	2.04%	2.89%	2.11%
Cost Of Revenue		$1.654B	$1.653B
YoY Change		0.73%	-0.51%
Gross Profit		$960.7M	$1.003B
YoY Change		6.83%	6.73%
Gross Profit Margin		36.75%	37.77%
Selling, General & Admin	$213.8M	$206.1M	$200.0M
YoY Change	6.0%	5.05%	2.62%
% of Gross Profit		21.45%	19.93%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$21.90M	$107.9M	$106.4M
YoY Change	2.34%	9.43%	5.03%
% of Gross Profit		11.23%	10.6%
Operating Expenses	$3.055B	$2.259B	$2.254B
YoY Change	36.22%	1.78%	0.05%
Operating Profit		-$1.298B	$335.2M
YoY Change		-514.89%	7.75%
Interest Expense	-$38.50M	-$38.40M	-$52.70M
YoY Change	2.39%	2.67%	41.29%
% of Operating Profit			-15.72%
Other Income/Expense, Net
YoY Change
Pretax Income	-$454.6M	$317.0M	$349.8M
YoY Change	-248.66%	11.58%	12.3%
Income Tax	-$172.4M	$97.90M	$110.4M
% Of Pretax Income		30.88%	31.56%
Net Earnings	-$282.2M	$219.1M	$239.4M
YoY Change	-227.58%	6.51%	9.52%
Net Earnings / Revenue	-10.69%	8.38%	9.01%
Basic Earnings Per Share	-$1.12	$0.86	$0.93
Diluted Earnings Per Share	-$1.12	$0.86	$0.93
COMMON SHARES
Basic Shares Outstanding	252.0M shares	253.6M shares	256.8M shares
Diluted Shares Outstanding		254.8M shares	257.9M shares

Concept	2014 Q4	2014 Q3	2014 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$103.0M	$61.00M	$112.0M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$531.7M	$531.4M	$528.3M
YoY Change	3.87%	4.44%	4.68%
Goodwill	$198.7M	$200.7M	$201.3M
YoY Change	-1.1%	-0.5%	0.15%
Intangibles
YoY Change
Long-Term Investments	$51.72B	$51.36B	$51.55B
YoY Change	5.73%	4.56%	5.44%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$62.45B	$61.96B	$62.22B
YoY Change	5.13%	3.99%	4.8%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$151.9M	$70.00M	$57.00M
YoY Change		-50.35%	-62.99%
Total Short-Term Liabilities	$226.0M	$80.00M	$72.00M
YoY Change	193.51%	-43.26%	-53.25%
LONG-TERM LIABILITIES
Long-Term Debt	$2.629B	$2.783B	$2.792B
YoY Change	0.64%	5.78%	5.6%
Other Long-Term Liabilities	$1.499B	$1.290B	$1.246B
YoY Change	21.97%	-13.25%	-11.69%
Total Long-Term Liabilities	$2.629B	$4.073B	$4.038B
YoY Change	0.64%	-1.09%	-0.42%
TOTAL LIABILITIES
Total Short-Term Liabilities	$226.0M	$80.00M	$72.00M
Total Long-Term Liabilities	$2.629B	$4.073B	$4.038B
Total Liabilities	$53.93B	$52.72B	$52.97B
YoY Change	6.27%	3.54%	3.9%
SHAREHOLDERS EQUITY
Retained Earnings	$7.302B	$8.631B	$8.454B
YoY Change	-9.45%	9.25%	9.33%
Common Stock	$2.251B	$2.687B	$2.682B
YoY Change	-15.68%	1.03%	1.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.198B	$2.650B	$2.549B
YoY Change	-49.0%	15.25%	14.62%
Treasury Stock Shares	49.52M shares	109.5M shares	106.6M shares
Shareholders Equity	$8.522B	$9.217B	$9.218B
YoY Change
Total Liabilities & Shareholders Equity	$62.45B	$61.96B	$62.22B
YoY Change	5.13%	3.99%	4.8%

Concept	2014 Q4	2014 Q3	2014 Q2
OPERATING ACTIVITIES
Net Income	-$282.2M	$219.1M	$239.4M
YoY Change	-227.58%	6.51%	9.52%
Depreciation, Depletion And Amortization	$21.90M	$107.9M	$106.4M
YoY Change	2.34%	9.43%	5.03%
Cash From Operating Activities	$279.6M	$218.2M	$379.1M
YoY Change	-13.17%	-16.46%	106.93%
INVESTING ACTIVITIES
Capital Expenditures	-$27.70M	-$28.40M	-$30.30M
YoY Change	-73.74%
Acquisitions
YoY Change
Other Investing Activities	-$164.0M	-$85.40M	$4.700M
YoY Change	-57.35%	-17.88%	-150.54%
Cash From Investing Activities	-$191.7M	-$113.8M	-$25.60M
YoY Change	-60.88%	9.42%	175.27%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-46.00M	-155.8M	-317.7M
YoY Change	-123.1%	9.72%	39.28%
NET CHANGE
Cash From Operating Activities	279.6M	218.2M	379.1M
Cash From Investing Activities	-191.7M	-113.8M	-25.60M
Cash From Financing Activities	-46.00M	-155.8M	-317.7M
Net Change In Cash	41.90M	-51.40M	35.80M
YoY Change	34.73%	-438.16%	-166.05%
FREE CASH FLOW
Cash From Operating Activities	$279.6M	$218.2M	$379.1M
Capital Expenditures	-$27.70M	-$28.40M	-$30.30M
Free Cash Flow	$307.3M	$246.6M	$409.4M
YoY Change	-28.12%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2015	dei	Amendment Flag AmendmentFlag	false
CY2015	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2015	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2015	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2015
CY2015	dei	Document Period End Date DocumentPeriodEndDate	2015-12-31
CY2015	dei	Document Type DocumentType	10-K
CY2015	dei	Entity Central Index Key EntityCentralIndexKey	0000005513
CY2016Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	238856627	shares
CY2015	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2015	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2015Q2	dei	Entity Public Float EntityPublicFloat	8800000000	USD
CY2015	dei	Entity Registrant Name EntityRegistrantName	Unum Group
CY2015	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2015	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2015	dei	Trading Symbol TradingSymbol	UNM
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CY2013Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1477400000	USD
CY2014Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1687400000	USD
CY2015Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1470300000	USD
CY2015	unm	A2013 Uk Tax Rate A2013UKTaxRate	0.23	Rate
CY2015	unm	A2014 Uk Tax Rate A2014UKTaxRate	0.21	Rate
CY2015	unm	A2015 Uk Tax Rate A2015UKTaxRate	0.2	Rate
CY2015	unm	A2017 Uk Tax Rate A2017UKTaxRate	0.19	Rate
CY2015	unm	A2020 Uk Tax Rate A2020UKTaxRate	0.18	Rate
CY2013Q4	unm	Accident And Health Active Life Reserves AccidentAndHealthActiveLifeReserves	8225500000	USD
CY2014Q4	unm	Accident And Health Active Life Reserves AccidentAndHealthActiveLifeReserves	9263500000	USD
CY2015Q4	unm	Accident And Health Active Life Reserves AccidentAndHealthActiveLifeReserves	9704400000	USD
CY2013	unm	Amount Funded To Special Purpose Entity Partnerships AmountFundedToSpecialPurposeEntityPartnerships	nor did we fund any amounts to the partnership
CY2014	unm	Amount Funded To Special Purpose Entity Partnerships AmountFundedToSpecialPurposeEntityPartnerships	nor did we fund any amounts to the partnership
CY2015	unm	Amount Funded To Special Purpose Entity Partnerships AmountFundedToSpecialPurposeEntityPartnerships	nor did we fund any amounts to the partnership
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CY2014Q4	unm	Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal	36578500000	USD
CY2015Q4	unm	Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal	37340100000	USD
CY2013	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	1363400000	USD
CY2014	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit	-1284700000	USD
CY2015	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit	1634900000	USD
CY2013	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	743300000	USD
CY2014	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	-665100000	USD
CY2015	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance Tax Expense ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceTaxExpense	856600000	USD
CY2015Q4	unm	Collateral Requirements Minimum Percentage Collateral To Fair Value Of Securities Loaned Or Purchased Under Repurchase Agreements CollateralRequirementsMinimumPercentageCollateralToFairValueOfSecuritiesLoanedOrPurchasedUnderRepurchaseAgreements	1.02
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CY2015Q4	unm	Commitments To Fund Special Purpose Entities CommitmentsToFundSpecialPurposeEntities	0	USD
CY2015Q4	unm	Committments To Fund Commercial Mortgage Loans CommittmentsToFundCommercialMortgageLoans	67000000	USD
CY2013Q4	unm	Count Of Financing Receivable Recorded Investment Nonaccrual Status CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus	0
CY2014Q4	unm	Count Of Financing Receivable Recorded Investment Nonaccrual Status CountOfFinancingReceivableRecordedInvestmentNonaccrualStatus	0
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CY2015Q4	unm	Excessof Financial Reporting Carrying Amount Overthe Tax Basisof Investmentsin Foreign Subsidiaries Provision Not Practicable ExcessofFinancialReportingCarryingAmountOvertheTaxBasisofInvestmentsinForeignSubsidiariesProvisionNotPracticable	1000000000.0	USD
CY2013	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	15700000	USD
CY2014	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	15100000	USD
CY2015	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	14600000	USD
CY2013Q4	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	7740500000	USD
CY2014Q4	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	7850900000	USD
CY2015Q4	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	7946300000	USD
CY2015Q4	unm	Line Of Credit Facility Maximum Borrowing Capacity If Requested LineOfCreditFacilityMaximumBorrowingCapacityIfRequested	600000000	USD
CY2015Q4	unm	Loan To Value Ratio Maximum LoanToValueRatioMaximum	0.75
CY2015	unm	Loan To Value Ratio Update Frequency LoanToValueRatioUpdateFrequency	three
CY2015Q4	unm	Mortage Loan Policy Debt Service Coverage Ratio Lower Range MortageLoanPolicyDebtServiceCoverageRatioLowerRange	1.25
CY2015	unm	Mortgage Loan Inspection Frequency MortgageLoanInspectionFrequency	two
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CY2014	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	318100000	USD
CY2015	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	96000000	USD
CY2013	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	246400000	USD
CY2014	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	108100000	USD
CY2015	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	313100000	USD
CY2015	unm	Number Of Changes To Accounting Policy For Estimating Credit Losses On Mortgage Loans NumberOfChangesToAccountingPolicyForEstimatingCreditLossesOnMortgageLoans	0
CY2015Q4	unm	Number Of Companies That Make Up Majority Of Reinsurance Recoverable NumberOfCompaniesThatMakeUpMajorityOfReinsuranceRecoverable	13
CY2013	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	15600000	USD
CY2014	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	21200000	USD
CY2015	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	16000000	USD
CY2013	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	0	USD
CY2014	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	800000	USD
CY2015	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	100000	USD
CY2015	unm	Outstanding Performance Share Unit Awards Grant Price Range Lower Limit OutstandingPerformanceShareUnitAwardsGrantPriceRangeLowerLimit	23.97
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CY2015	unm	Outstanding Restricted Stock Unit Grant Prices Lower Limit OutstandingRestrictedStockUnitGrantPricesLowerLimit	23.97
CY2015	unm	Outstanding Restricted Stock Unit Grant Prices Upper Limit OutstandingRestrictedStockUnitGrantPricesUpperLimit	36.95
CY2014Q4	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2015Q4	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2014Q4	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3068400000	USD
CY2015Q4	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3150100000	USD
CY2013	unm	Premium Tax Expense PremiumTaxExpense	137000000	USD
CY2014	unm	Premium Tax Expense PremiumTaxExpense	139200000	USD
CY2015	unm	Premium Tax Expense PremiumTaxExpense	146500000	USD
CY2014Q4	unm	Reserve Chargefor Longterm Care Product After Tax ReserveChargeforLongtermCareProductAfterTax	453800000	USD
CY2014Q4	unm	Reserve Increasefor Longterm Care Before Tax ReserveIncreaseforLongtermCareBeforeTax	698200000	USD
CY2013	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	200000	USD
CY2014	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	100000	USD
CY2015	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	300000	USD
CY2013Q4	unm	Tax Attributable To Temporary Items Included Above TaxAttributableToTemporaryItemsIncludedAbove	10200000	USD
CY2014Q4	unm	Tax Attributable To Temporary Items Included Above TaxAttributableToTemporaryItemsIncludedAbove	10400000	USD
CY2015Q4	unm	Tax Attributable To Temporary Items Included Above TaxAttributableToTemporaryItemsIncludedAbove	0	USD
CY2014	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	18600000	USD
CY2015	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	18500000	USD
CY2015	unm	Tax Expense Not Recognized Due To Permanent Differences TaxExpenseNotRecognizedDueToPermanentDifferences	200000000	USD
CY2015	unm	Total Acquiree Assets Purchased TotalAcquireeAssetsPurchased	18600000	GBP
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CY2015	unm	Total Acquiree Liabilities Purchased TotalAcquireeLiabilitiesPurchased	5000000	GBP
CY2015	unm	Total Acquiree Liabilities Purchased TotalAcquireeLiabilitiesPurchased	7500000	USD
CY2013	unm	Unclaimed Death Benefit Reserve Increase Decrease Before Taxes UnclaimedDeathBenefitReserveIncreaseDecreaseBeforeTaxes	95500000	USD
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CY2014Q4	unm	Unrealized Adjustment To Reserves For Future Policy And Contract Benefits UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits	6150300000	USD
CY2015Q4	unm	Unrealized Adjustment To Reserves For Future Policy And Contract Benefits UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits	3578400000	USD
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CY2014Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	696100000	USD
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CY2014Q4	us-gaap	Accumulated Amortization Of Other Deferred Costs AccumulatedAmortizationOfOtherDeferredCosts	134700000	USD
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CY2014Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	823300000	USD
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CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	166400000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	16100000	USD
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CY2015Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2247200000	USD
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CY2014	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	41800000	USD
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CY2013	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	23600000	USD
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CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	23800000	USD
CY2013	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	15600000	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	14900000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	15700000	USD
CY2014	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	23200000	USD
CY2015	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	23300000	USD
CY2013	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
CY2014	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	300000	shares
CY2014Q4	us-gaap	Assets Assets	62450200000	USD
CY2015Q4	us-gaap	Assets Assets	60589700000	USD
CY2013	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	203200000	USD
CY2014	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	189800000	USD
CY2015	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	202800000	USD
CY2014Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	38803400000	USD
CY2015Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	39658700000	USD
CY2014Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	45064900000	USD
CY2015Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	43354400000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	42400000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	146300000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	82400000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	496000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1700900000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	7403900000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	838900000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	577300000	USD
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	9532900000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	10519300000	USD
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6871200000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6514000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	18802400000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	19194600000	USD
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CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1112200000	USD
CY2014Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	2224900000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	2318600000	USD
CY2014Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	45064900000	USD
CY2015Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	43354400000	USD
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CY2015	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	25600000	USD
CY2014Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	67000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	27300000	USD
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CY2014Q4	us-gaap	Cash Cash	102500000	USD
CY2015Q4	us-gaap	Cash Cash	112900000	USD
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CY2015	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	53600000	USD
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CY2015	us-gaap	Ceded Premiums Earned CededPremiumsEarned	272300000	USD
CY2014Q4	us-gaap	Collateralized Financings CollateralizedFinancings	73800000	USD
CY2015Q4	us-gaap	Collateralized Financings CollateralizedFinancings	415400000	USD
CY2014Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
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CY2015Q4	us-gaap	Common Stock Value CommonStockValue	30300000	USD
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CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	716800000	USD
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CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	280500000	USD
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CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	61600000	USD
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CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	135500000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	342100000	USD
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CY2015Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2008500000	USD
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CY2014	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	83200000	USD
CY2015	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	87400000	USD
CY2014Q4	us-gaap	Deferred Revenue And Credits DeferredRevenueAndCredits	41700000	USD
CY2015Q4	us-gaap	Deferred Revenue And Credits DeferredRevenueAndCredits	31900000	USD
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CY2015Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1320800000	USD
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CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1319500000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5200000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	14300000	USD
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CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
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CY2015Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	140400000	USD
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CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	87100000	USD
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CY2014Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	5400000	USD
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CY2014Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash	73800000	USD
CY2015Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash	65400000	USD
CY2014Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	125300000	USD
CY2015Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	165400000	USD
CY2014Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	204500000	USD
CY2015Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	231400000	USD
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CY2015	us-gaap	Direct Premiums Earned DirectPremiumsEarned	8151900000	USD
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CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.50
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CY2014	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
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CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.014
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CY2014	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	3300000	USD
CY2015	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-37700000	USD
CY2014Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	1851700000	USD
CY2015Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	1837100000	USD
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CY2015Q4	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	1376500000	USD
CY2015Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	168500000	USD
CY2015Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	350000000	USD
CY2015Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	30900000	USD
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CY2015	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-17600000	USD
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CY2015	us-gaap	Gain Loss From Components Excluded From Assessment Of Cash Flow Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet	0	USD
CY2013	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
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CY2015	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2015	us-gaap	Gain Loss From Hedged Firm Commitment Not Qualifying As Fair Value Hedge Net GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet	0	USD
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CY2015	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
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CY2015Q4	us-gaap	Goodwill Goodwill	230900000	USD
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CY2015	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	600000	USD
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CY2015	us-gaap	Impairment Of Investments ImpairmentOfInvestments	5900000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1086800000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	391700000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1057800000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	133200000	USD
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CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	139900000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	371200000	USD
CY2013	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	196600000	USD
CY2014	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	103200000	USD
CY2015	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	330500000	USD
CY2014Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	69500000	USD
CY2015Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	0	USD
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CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-6500000	USD
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CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	155700000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	189100000	USD
CY2013	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-23500000	USD
CY2014	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-18600000	USD
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CY2013	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	226300000	USD
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CY2015	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	194100000	USD
CY2013	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	-378200000	USD
CY2014	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	-3800000	USD
CY2015	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	341600000	USD
CY2013	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	466800000	USD
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CY2013	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	572500000	USD
CY2014	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	972200000	USD
CY2015	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	293900000	USD
CY2013	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	21200000	USD
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CY2014	us-gaap	Insurance Commissions InsuranceCommissions	935300000	USD
CY2015	us-gaap	Insurance Commissions InsuranceCommissions	996300000	USD
CY2013	us-gaap	Interest And Debt Expense InterestAndDebtExpense	149400000	USD
CY2014	us-gaap	Interest And Debt Expense InterestAndDebtExpense	167500000	USD
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CY2013	us-gaap	Interest Paid InterestPaid	144600000	USD
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CY2015	us-gaap	Interest Paid InterestPaid	146900000	USD
CY2013	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	2552100000	USD
CY2014	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	2536300000	USD
CY2015	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	2527000000	USD
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2015

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2015-12-31

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10-K

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Entity Common Stock Shares Outstanding

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CY2015

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Entity Current Reporting Status

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Large Accelerated Filer

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CY2015

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Entity Registrant Name

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Unum Group

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Entity Voluntary Filers

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No

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Entity Well Known Seasoned Issuer

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Yes

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1477400000

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CY2014Q4

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CY2015Q4

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A2013 Uk Tax Rate

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nor did we fund any amounts to the partnership

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nor did we fund any amounts to the partnership

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36578500000

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Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal

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37340100000

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

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1363400000

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

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-1284700000

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

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1634900000

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

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743300000

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

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-665100000

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

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856600000

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

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0

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Committments To Fund Commercial Mortgage Loans

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Count Of Financing Receivable Recorded Investment Nonaccrual Status

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0

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Count Of Financing Receivable Recorded Investment Nonaccrual Status

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0

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0

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Life Reserves For Future Policy And Contract Benefits

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Life Reserves For Future Policy And Contract Benefits

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0.75

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Loan To Value Ratio Update Frequency

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three

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1.25

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two

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25

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318100000

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96000000

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246400000

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Notional Amount Of Derivatives Terminations

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108100000

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CY2015

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Notional Amount Of Derivatives Terminations

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313100000

USD

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unm

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

NumberOfChangesToAccountingPolicyForEstimatingCreditLossesOnMortgageLoans

0

CY2015Q4

unm

Number Of Companies That Make Up Majority Of Reinsurance Recoverable

NumberOfCompaniesThatMakeUpMajorityOfReinsuranceRecoverable

13

CY2013

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

15600000

USD

CY2014

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

21200000

USD

CY2015

unm

Other Investments Gross Realized Gains

OtherInvestmentsGrossRealizedGains

16000000

USD

CY2013

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

0

USD

CY2014

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

800000

USD

CY2015

unm

Other Investments Gross Realized Losses

OtherInvestmentsGrossRealizedLosses

100000

USD

CY2015

unm

Outstanding Performance Share Unit Awards Grant Price Range Lower Limit

OutstandingPerformanceShareUnitAwardsGrantPriceRangeLowerLimit

23.97

CY2015

unm

Outstanding Performance Share Unit Awards Grant Price Range Upper Limit

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34.08

CY2015

unm

Outstanding Restricted Stock Unit Grant Prices Lower Limit

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23.97

CY2015

unm

Outstanding Restricted Stock Unit Grant Prices Upper Limit

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36.95

CY2014Q4

unm

Percentage Of Loan Portfolio

PercentageOfLoanPortfolio

1.000

CY2015Q4

unm

Percentage Of Loan Portfolio

PercentageOfLoanPortfolio

1.000

CY2014Q4

unm

Policy Loans Cededto Reinsurers

PolicyLoansCededtoReinsurers

3068400000

USD

CY2015Q4

unm

Policy Loans Cededto Reinsurers

PolicyLoansCededtoReinsurers

3150100000

USD

CY2013

unm

Premium Tax Expense

PremiumTaxExpense

137000000

USD

CY2014

unm

Premium Tax Expense

PremiumTaxExpense

139200000

USD

CY2015

unm

Premium Tax Expense

PremiumTaxExpense

146500000

USD

CY2014Q4

unm

Reserve Chargefor Longterm Care Product After Tax

ReserveChargeforLongtermCareProductAfterTax

453800000

USD

CY2014Q4

unm

Reserve Increasefor Longterm Care Before Tax

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698200000

USD

CY2013

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

200000

USD

CY2014

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

100000

USD

CY2015

unm

Shares Repurchased Cost Commissions

SharesRepurchasedCostCommissions

300000

USD

CY2013Q4

unm

Tax Attributable To Temporary Items Included Above

TaxAttributableToTemporaryItemsIncludedAbove

10200000

USD

CY2014Q4

unm

Tax Attributable To Temporary Items Included Above

TaxAttributableToTemporaryItemsIncludedAbove

10400000

USD

CY2015Q4

unm

Tax Attributable To Temporary Items Included Above

TaxAttributableToTemporaryItemsIncludedAbove

0

USD

CY2014

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

18600000

USD

CY2015

unm

Tax Benefitsfrom Low Income Housing Investments

TaxBenefitsfromLowIncomeHousingInvestments

18500000

USD

CY2015

unm

Tax Expense Not Recognized Due To Permanent Differences

TaxExpenseNotRecognizedDueToPermanentDifferences

200000000

USD

CY2015

unm

Total Acquiree Assets Purchased

TotalAcquireeAssetsPurchased

18600000

GBP

CY2015

unm

Total Acquiree Assets Purchased

TotalAcquireeAssetsPurchased

28100000

USD

CY2015

unm

Total Acquiree Liabilities Purchased

TotalAcquireeLiabilitiesPurchased

5000000

GBP

CY2015

unm

Total Acquiree Liabilities Purchased

TotalAcquireeLiabilitiesPurchased

7500000

USD

CY2013

unm

Unclaimed Death Benefit Reserve Increase Decrease Before Taxes

UnclaimedDeathBenefitReserveIncreaseDecreaseBeforeTaxes

95500000

USD

CY2013Q4

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

4108500000

USD

CY2014Q4

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

6150300000

USD

CY2015Q4

unm

Unrealized Adjustment To Reserves For Future Policy And Contract Benefits

UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits

3578400000

USD

CY2015Q4

unm

Unum Group Percentage Ownershipof Provident Financing Trust

UnumGroupPercentageOwnershipofProvidentFinancingTrust

1.00

CY2014Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

696100000

USD

CY2015Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

702800000

USD

CY2014Q4

us-gaap

Accumulated Amortization Of Other Deferred Costs

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134700000

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CY2015Q4

us-gaap

Accumulated Amortization Of Other Deferred Costs

AccumulatedAmortizationOfOtherDeferredCosts

133100000

USD

CY2014Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

823300000

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CY2015Q4

us-gaap

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

902600000

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CY2014Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

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166400000

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CY2015Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

16100000

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CY2014Q4

us-gaap

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

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

0

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CY2015Q4

us-gaap

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

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

0.0

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CY2014Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

2221200000

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CY2015Q4

us-gaap

Additional Paid In Capital Common Stock

AdditionalPaidInCapitalCommonStock

2247200000

USD

CY2013

us-gaap

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

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

800000

USD

CY2014

us-gaap

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

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

3000000

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CY2015

us-gaap

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

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

3600000

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CY2014

us-gaap

Affordable Housing Tax Credits And Other Tax Benefits Amount

AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

41800000

USD

CY2015

us-gaap

Affordable Housing Tax Credits And Other Tax Benefits Amount

AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

41800000

USD

CY2013

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

23600000

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CY2014

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

22600000

USD

CY2015

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

23800000

USD

CY2013

us-gaap

Allocated Share Based Compensation Expense Net Of Tax

AllocatedShareBasedCompensationExpenseNetOfTax

15600000

USD

CY2014

us-gaap

Allocated Share Based Compensation Expense Net Of Tax

AllocatedShareBasedCompensationExpenseNetOfTax

14900000

USD

CY2015

us-gaap

Allocated Share Based Compensation Expense Net Of Tax

AllocatedShareBasedCompensationExpenseNetOfTax

15700000

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CY2014

us-gaap

Amortization Method Qualified Affordable Housing Project Investments Amortization

AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

23200000

USD

CY2015

us-gaap

Amortization Method Qualified Affordable Housing Project Investments Amortization

AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

23300000

USD

CY2013

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

100000

shares

CY2014

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

100000

shares

CY2015

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

300000

shares

CY2014Q4

us-gaap

Assets

62450200000

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CY2015Q4

us-gaap

Assets

60589700000

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CY2013

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

203200000

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CY2014

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

189800000

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CY2015

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

202800000

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CY2014Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

38803400000

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CY2015Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

39658700000

USD

CY2014Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

45064900000

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CY2015Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

43354400000

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CY2014Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

42400000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

146300000

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CY2014Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

82400000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

496000000

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CY2014Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

1700900000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

7403900000

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CY2014Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

838900000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

577300000

USD

CY2014Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

9532900000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

10519300000

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CY2014Q4

us-gaap

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

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6871200000

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CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

6514000000

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CY2014Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

18802400000

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CY2015Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

19194600000

USD

CY2014Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

1372000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

1112200000

USD

CY2014Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

2224900000

USD

CY2015Q4

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

2318600000

USD

CY2014Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

45064900000

USD

CY2015Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

43354400000

USD

CY2013

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

15800000

USD

CY2014

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

9300000

USD

CY2015

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

23800000

USD

CY2013

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

45700000

USD

CY2014

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

7500000

USD

CY2015

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

25600000

USD

CY2014Q4

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

67000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

27300000

USD

CY2013

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

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USD

CY2014

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

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CY2015

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

9493000000

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CY2015

us-gaap

Business Acquisition Effective Date Of Acquisition1

BusinessAcquisitionEffectiveDateOfAcquisition1

2015-09-03

CY2015

us-gaap

Business Acquisition Name Of Acquired Entity

BusinessAcquisitionNameOfAcquiredEntity

National Dental Plan Limited and associated companies (National Dental)

CY2015Q4

us-gaap

Business Acquisition Percentage Of Voting Interests Acquired

BusinessAcquisitionPercentageOfVotingInterestsAcquired

1

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CY2014

us-gaap

Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period

BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod

14700000

GBP

CY2014

us-gaap

Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period

BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod

24200000

USD

CY2012Q4

us-gaap

Cash

77300000

USD

CY2013Q4

us-gaap

Cash

94100000

USD

CY2014Q4

us-gaap

Cash

102500000

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CY2015Q4

us-gaap

Cash

112900000

USD

CY2013

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

16800000

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CY2014

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

8400000

USD

CY2015

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

10400000

USD

CY2015

us-gaap

Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months

CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

53600000

USD

CY2013

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

355800000

USD

CY2014

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

291900000

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CY2015

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

272300000

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CY2014Q4

us-gaap

Collateralized Financings

CollateralizedFinancings

73800000

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CY2015Q4

us-gaap

Collateralized Financings

CollateralizedFinancings

415400000

USD

CY2014Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

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CY2015Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

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CY2014Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.10

CY2015Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.10

CY2014Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

725000000

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CY2015Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

725000000

shares

CY2014Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

301834556

shares

CY2015Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

302702811

shares

CY2014Q4

us-gaap

Common Stock Value

CommonStockValue

30200000

USD

CY2015Q4

us-gaap

Common Stock Value

CommonStockValue

30300000

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CY2013

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

474000000

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CY2014

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

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CY2015

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

716800000

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CY2015Q4

us-gaap

Credit Risk Derivatives At Fair Value Net

CreditRiskDerivativesAtFairValueNet

8500000

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CY2013

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

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CY2014

us-gaap

Current Federal Tax Expense Benefit

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160600000

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CY2015

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

280500000

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CY2013

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

18700000

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CY2014

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

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CY2015

us-gaap

Current Foreign Tax Expense Benefit

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61600000

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CY2013

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

328500000

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CY2014

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

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CY2015

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

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CY2014Q4

us-gaap

Debt Current

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CY2015Q4

us-gaap

Debt Current

DebtCurrent

352400000

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CY2013

us-gaap

Deferred Federal Income Tax Expense Benefit

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41300000

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CY2014

us-gaap

Deferred Federal Income Tax Expense Benefit

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CY2015

us-gaap

Deferred Federal Income Tax Expense Benefit

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CY2013

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

3200000

USD

CY2014

us-gaap

Deferred Foreign Income Tax Expense Benefit

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54900000

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CY2015

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Deferred Foreign Income Tax Expense Benefit

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CY2013

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

44500000

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CY2014

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

4400000

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CY2015

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

29100000

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CY2014Q4

us-gaap

Deferred Income Tax Liabilities

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2240400000

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CY2015Q4

us-gaap

Deferred Income Tax Liabilities

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CY2013

us-gaap

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CY2014

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

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440800000

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CY2015

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Deferred Policy Acquisition Cost Amortization Expense

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482300000

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CY2014Q4

us-gaap

Deferred Policy Acquisition Costs

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CY2015Q4

us-gaap

Deferred Policy Acquisition Costs

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CY2013

us-gaap

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47900000

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CY2014

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Deferred Policy Acquisition Costs Period Increase Decrease

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83200000

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CY2015

us-gaap

Deferred Policy Acquisition Costs Period Increase Decrease

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87400000

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CY2014Q4

us-gaap

Deferred Revenue And Credits

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41700000

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CY2015Q4

us-gaap

Deferred Revenue And Credits

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CY2014Q4

us-gaap

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CY2015Q4

us-gaap

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CY2014Q4

us-gaap

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2178400000

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CY2015Q4

us-gaap

Deferred Tax Assets Net

DeferredTaxAssetsNet

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CY2014Q4

us-gaap

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5200000

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CY2015Q4

us-gaap

Deferred Tax Assets Other

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14300000

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CY2014Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits

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254000000

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CY2015Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits

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246000000

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CY2014Q4

us-gaap

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1919200000

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CY2015Q4

us-gaap

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1060500000

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CY2014Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

0

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CY2015Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

1300000

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CY2014Q4

us-gaap

Deferred Tax Liabilities

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CY2015Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

91800000

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CY2014Q4

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97400000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

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140400000

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CY2014Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

1982800000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

1128400000

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CY2014Q4

us-gaap

Deferred Tax Liabilities Other

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64600000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

55400000

USD

CY2014Q4

us-gaap

Deferred Tax Liabilities Property Plant And Equipment

DeferredTaxLiabilitiesPropertyPlantAndEquipment

95600000

USD

CY2015Q4

us-gaap

Deferred Tax Liabilities Property Plant And Equipment

DeferredTaxLiabilitiesPropertyPlantAndEquipment

87100000

USD

CY2015

us-gaap

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

DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1

3200000

USD

CY2015

us-gaap

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

DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1

100000

USD

CY2015

us-gaap

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

DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation

4300000

USD

CY2015

us-gaap

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

DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents

200000

USD

CY2015

us-gaap

Defined Benefit Plan Future Amortization Of Gain Loss

DefinedBenefitPlanFutureAmortizationOfGainLoss

-16500000

USD

CY2015

us-gaap

Defined Benefit Plan Future Amortization Of Prior Service Cost Credit

DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit

-500000

USD

CY2015

us-gaap

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

DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear

0.075

Rate

CY2015

us-gaap

Defined Benefit Plan Ultimate Health Care Cost Trend Rate

DefinedBenefitPlanUltimateHealthCareCostTrendRate

0.05

Rate

CY2013

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

84800000

USD

CY2014

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

87900000

USD

CY2015

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

99500000

USD

CY2014Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

0

USD

CY2015Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

0

USD

CY2014Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed

204500000

USD

CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed

231400000

USD

CY2014Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral

5400000

USD

CY2015Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral

600000

USD

CY2014Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash

73800000

USD

CY2015Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash

65400000

USD

CY2014Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities

125300000

USD

CY2015Q4

us-gaap

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

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities

165400000

USD

CY2014Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross

204500000

USD

CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross

231400000

USD

CY2014Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability

0

USD

CY2015Q4

us-gaap

Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability

DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability

0

USD

CY2014Q4

us-gaap

Derivative Assets

DerivativeAssets

28000000

USD

CY2015Q4

us-gaap

Derivative Assets

DerivativeAssets

49800000

USD

CY2014Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

15400000

USD

CY2015Q4

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

36400000

USD

CY2014Q4

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

7200000

USD

CY2015Q4

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

12800000

USD

CY2014Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

0

USD

CY2015Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

0

USD

CY2014Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

28000000

USD

CY2015Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

49800000

USD

CY2014Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

5400000

USD

CY2015Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

600000

USD

CY2013

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-1900000

USD

CY2014

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

11000000

USD

CY2015

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

35700000

USD

CY2013

us-gaap

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

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

23000000

USD

CY2014

us-gaap

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

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

53000000

USD

CY2015

us-gaap

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

DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

83400000

USD

CY2013

us-gaap

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

DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet

15300000

USD

CY2014

us-gaap

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

DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet

16100000

USD

CY2015

us-gaap

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

DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet

67400000

USD

CY2014Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

142800000

USD

CY2015Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

137800000

USD

CY2014Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned

151300000

USD

CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned

79200000

USD

CY2014Q4

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral

25900000

USD

CY2015Q4

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral

14600000

USD

CY2014Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset

0

USD

CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset

0

USD

CY2014Q4

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash

0

USD

CY2015Q4

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash

0

USD

CY2014Q4

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities

125400000

USD

CY2015Q4

us-gaap

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

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities

64600000

USD

CY2014Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross

151300000

USD

CY2015Q4

us-gaap

Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross

DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross

79200000

USD

CY2014Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

92900000

USD

CY2015Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

50200000

USD

CY2013

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

7777300000

USD

CY2014

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

7899300000

USD

CY2015

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

8151900000

USD

CY2013

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.20

CY2014Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.87

CY2014Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.93

CY2014Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.86

CY2014Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-1.12

CY2014

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.57

CY2015Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.85

CY2015Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.90

CY2015Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.83

CY2015Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.93

CY2015

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.51

CY2013

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.19

CY2014Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.86

CY2014Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.93

CY2014Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.86

CY2014Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-1.12

CY2014

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.57

CY2015Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.84

CY2015Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.90

CY2015Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.83

CY2015Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.93

CY2015

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.50

CY2013

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.306

CY2014

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.258

CY2015

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.300

CY2013

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

CY2014

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

CY2015

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

CY2013

us-gaap

Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential

EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential

-0.018

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential

EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential

-0.04

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential

EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential

-0.025

CY2013

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

EffectiveIncomeTaxRateReconciliationOtherAdjustments

-0.007

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

EffectiveIncomeTaxRateReconciliationOtherAdjustments

-0.007

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

EffectiveIncomeTaxRateReconciliationOtherAdjustments

-0.011

CY2013

us-gaap

Effective Income Tax Rate Reconciliation Tax Credits

EffectiveIncomeTaxRateReconciliationTaxCredits

0.019

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Tax Credits

EffectiveIncomeTaxRateReconciliationTaxCredits

0.045

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Tax Credits

EffectiveIncomeTaxRateReconciliationTaxCredits

0.014

CY2013

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

30700000

USD

CY2014

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

3300000

USD

CY2015

us-gaap

Embedded Derivative Gain Loss On Embedded Derivative Net

EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet

-37700000

USD

CY2014Q4

us-gaap

Fair Value Assets Level1 To Level2 Transfers Amount

FairValueAssetsLevel1ToLevel2TransfersAmount

1851700000

USD

CY2015Q4

us-gaap

Fair Value Assets Level1 To Level2 Transfers Amount

FairValueAssetsLevel1ToLevel2TransfersAmount

1837100000

USD

CY2014Q4

us-gaap

Fair Value Assets Level2 To Level1 Transfers Amount

FairValueAssetsLevel2ToLevel1TransfersAmount

1837100000

USD

CY2015Q4

us-gaap

Fair Value Assets Level2 To Level1 Transfers Amount

FairValueAssetsLevel2ToLevel1TransfersAmount

1376500000

USD

CY2015Q4

us-gaap

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

FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

168500000

USD

CY2015Q4

us-gaap

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

FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch

350000000

USD

CY2015Q4

us-gaap

Federal Home Loan Bank Stock

FederalHomeLoanBankStock

30900000

USD

CY2013

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-4900000

USD

CY2014

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-3500000

USD

CY2015

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-17600000

USD

CY2013

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

CY2014

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

CY2015

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet

0

USD

CY2013

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

CY2014

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

CY2015

us-gaap

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

GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet

0

USD

CY2015

us-gaap

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

GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet

0

USD

CY2013

us-gaap

Gain Loss On Investments

GainLossOnInvestments

6800000

USD

CY2014Q1

us-gaap

Gain Loss On Investments

GainLossOnInvestments

6300000

USD

CY2014Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

25900000

USD

CY2014Q3

us-gaap

Gain Loss On Investments

GainLossOnInvestments

1200000

USD

CY2014Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-17300000

USD

CY2014

us-gaap

Gain Loss On Investments

GainLossOnInvestments

16100000

USD

CY2015Q1

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-15300000

USD

CY2015Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

800000

USD

CY2015Q3

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-26600000

USD

CY2015Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-2700000

USD

CY2015

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-43800000

USD

CY2013

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

7600000

USD

CY2014

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

29600000

USD

CY2015

us-gaap

Gain Loss On Investments Excluding Other Than Temporary Impairments

GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments

-11400000

USD

CY2013

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2014

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2015

us-gaap

Gain On Cash Flow Hedge Ineffectiveness

GainOnCashFlowHedgeIneffectiveness

0

USD

CY2013

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2014

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2015

us-gaap

Gain On Fair Value Hedge Ineffectiveness

GainOnFairValueHedgeIneffectiveness

0

USD

CY2013

us-gaap

Gains Losses On Sales Of Other Real Estate

GainsLossesOnSalesOfOtherRealEstate

0

USD

CY2014

us-gaap

Gains Losses On Sales Of Other Real Estate

GainsLossesOnSalesOfOtherRealEstate

0

USD

CY2015

us-gaap

Gains Losses On Sales Of Other Real Estate

GainsLossesOnSalesOfOtherRealEstate

0

USD

CY2014Q4

us-gaap

Goodwill

198700000

USD

CY2015Q4

us-gaap

Goodwill

230900000

USD

CY2013

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

14900000

USD

CY2014

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

26700000

USD

CY2015

us-gaap

Impaired Financing Receivable Average Recorded Investment

ImpairedFinancingReceivableAverageRecordedInvestment

8600000

USD

CY2013

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

800000

USD

CY2014

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

1000000

USD

CY2015

us-gaap

Impaired Financing Receivable Interest Income Accrual Method

ImpairedFinancingReceivableInterestIncomeAccrualMethod

600000

USD

CY2013

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

2000000

USD

CY2014

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

3400000

USD

CY2015

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

5900000

USD

CY2013

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

1086800000

USD

CY2014

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

391700000

USD

CY2015

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

1057800000

USD

CY2013

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

133200000

USD

CY2014

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

150300000

USD

CY2015

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

180500000

USD

CY2013

us-gaap

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