$UNM
Unum Group Stock $unm

$unm Overview Financials Valuation SEC Filings Company Website

2019 Q2 Form 10-Q Financial Statement

#000000551319000122 Filed on July 31, 2019

Income Statement

Concept	2019 Q2	2018 Q2
Revenue	$3.017B	$2.890B
YoY Change	4.37%	2.42%
Cost Of Revenue	$1.903B	$1.804B
YoY Change	5.46%	2.97%
Gross Profit	$1.114B	$1.086B
YoY Change	2.57%	1.51%
Gross Profit Margin	36.93%	37.58%
Selling, General & Admin	$223.9M	$220.2M
YoY Change	1.68%	1.99%
% of Gross Profit	20.1%	20.27%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$151.6M	$140.2M
YoY Change	8.13%	1.37%
% of Gross Profit	13.61%	12.91%
Operating Expenses	$2.622B	$2.493B
YoY Change	5.17%	3.0%
Operating Profit	-$1.508B	-$1.407B
YoY Change	7.19%	4.18%
Interest Expense	-$42.60M	-$42.40M
YoY Change	0.47%	6.27%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$352.0M	$354.8M
YoY Change	-0.79%	-1.88%
Income Tax	$70.80M	$69.30M
% Of Pretax Income	20.11%	19.53%
Net Earnings	$281.2M	$285.5M
YoY Change	-1.51%	16.48%
Net Earnings / Revenue	9.32%	9.88%
Basic Earnings Per Share	$1.33	$1.29
Diluted Earnings Per Share	$1.33	$1.29
COMMON SHARES
Basic Shares Outstanding	211.1M shares	220.8M shares
Diluted Shares Outstanding	211.1M shares	221.1M shares

Balance Sheet

Concept	2019 Q2	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$61.00M	$100.0M
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	$556.1M	$510.8M
YoY Change	8.87%	2.76%
Goodwill	$350.1M	$346.5M
YoY Change	1.04%	2.79%
Intangibles
YoY Change
Long-Term Investments	$54.37B	$51.20B
YoY Change	6.19%	-2.23%
Other Assets	$0.00
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$65.84B	$62.37B
YoY Change	5.58%	-1.6%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due		$200.0M
YoY Change
Total Short-Term Liabilities	$250.0M	$508.0M
YoY Change	-50.79%	24.51%
LONG-TERM LIABILITIES
Long-Term Debt	$3.341B	$2.998B
YoY Change	11.44%	1.01%
Other Long-Term Liabilities	$1.827B	$1.672B
YoY Change	9.27%	0.24%
Total Long-Term Liabilities	$5.168B	$4.670B
YoY Change	10.66%	0.73%
TOTAL LIABILITIES
Total Short-Term Liabilities	$250.0M	$508.0M
Total Long-Term Liabilities	$5.168B	$4.670B
Total Liabilities	$56.39B	$52.92B
YoY Change	6.56%	-2.12%
SHAREHOLDERS EQUITY
Retained Earnings	$10.31B	$10.01B
YoY Change	2.96%	9.7%
Common Stock	$2.366B	$2.339B
YoY Change	1.16%	1.12%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.980B	$2.629B
YoY Change	13.34%	17.98%
Treasury Stock Shares	96.14M shares	86.35M shares
Shareholders Equity	$9.453B	$9.446B
YoY Change
Total Liabilities & Shareholders Equity	$65.84B	$62.37B
YoY Change	5.58%	-1.6%

Cashflow Statement

Concept	2019 Q2	2018 Q2
OPERATING ACTIVITIES
Net Income	$281.2M	$285.5M
YoY Change	-1.51%	16.48%
Depreciation, Depletion And Amortization	$151.6M	$140.2M
YoY Change	8.13%	1.37%
Cash From Operating Activities	$425.9M	$396.3M
YoY Change	7.47%	18.65%
INVESTING ACTIVITIES
Capital Expenditures	-$36.80M	-$30.50M
YoY Change	20.66%	48.78%
Acquisitions
YoY Change
Other Investing Activities	-$605.2M	-$690.4M
YoY Change	-12.34%	425.02%
Cash From Investing Activities	-$642.0M	-$720.9M
YoY Change	-10.94%	374.28%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	214.8M	115.2M
YoY Change	86.46%	-166.98%
NET CHANGE
Cash From Operating Activities	425.9M	396.3M
Cash From Investing Activities	-642.0M	-720.9M
Cash From Financing Activities	214.8M	115.2M
Net Change In Cash	-1.300M	-209.4M
YoY Change	-99.38%	-2194.0%
FREE CASH FLOW
Cash From Operating Activities	$425.9M	$396.3M
Capital Expenditures	-$36.80M	-$30.50M
Free Cash Flow	$462.7M	$426.8M
YoY Change	8.41%	20.39%

Facts In Submission

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	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Entity Central Index Key EntityCentralIndexKey	0000005513
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	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-11294
	dei	Entity Registrant Name EntityRegistrantName	Unum Group
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	62-1598430
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1 Fountain Square
	dei	Entity Address City Or Town EntityAddressCityOrTown	Chattanooga,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	TN
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	37402
	dei	City Area Code CityAreaCode	423
	dei	Local Phone Number LocalPhoneNumber	294-1011
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	335000000.0	USD
CY2019Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	151600000	USD
CY2018Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	140200000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	322200000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	291700000	USD
CY2019Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	223900000	USD
CY2018Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	220200000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	450400000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	441900000	USD
CY2019Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	229900000	USD
CY2018Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	220800000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	467800000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	445000000.0	USD
CY2019Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2664700000	USD
CY2018Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2535500000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	5299000000.0	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	5094000000.0	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	352000000.0	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	70800000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	69300000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	143200000	USD
CY2019Q2	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	74000000.0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-14300000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4600000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-6300000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-7400000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-9400000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	259800000	USD
CY2018Q2	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	80600000	USD
	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	128300000	USD
	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	170000000.0	USD
CY2019Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3200000	USD
CY2018Q2	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-11300000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	14900000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-33100000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	136900000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	281200000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	285500000	USD
	us-gaap	Net Income Loss NetIncomeLoss	562100000	USD
	us-gaap	Net Income Loss NetIncomeLoss	559000000.0	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.64
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.53
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.64
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.52
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	281200000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	285500000	USD
	us-gaap	Net Income Loss NetIncomeLoss	562100000	USD
	us-gaap	Net Income Loss NetIncomeLoss	559000000.0	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1047700000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-635000000.0	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2292800000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1677100000	USD
CY2019Q2	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	-760700000	USD
CY2018Q2	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	503400000	USD
	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit	-1693500000	USD
	unm	Change In Adjustment To Deferred Acquisition Costs And Reserves For Future Policy And Contract Benefits Net Of Reinsurance And Net Of Tax Expense Benefit ChangeInAdjustmentToDeferredAcquisitionCostsAndReservesForFuturePolicyAndContractBenefitsNetOfReinsuranceAndNetOfTaxExpenseBenefit	1311300000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-12100000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-6700000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-32600000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-15500000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-19700000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-61800000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	172800000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	9453100000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	9446400000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1133800000	USD
	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	-100000000.0	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-193800000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	571700000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-386200000	USD
CY2019Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	541000000.0	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	91700000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	9453100000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	9446400000	USD
	us-gaap	Net Income Loss NetIncomeLoss	562100000	USD
	us-gaap	Net Income Loss NetIncomeLoss	559000000.0	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-57200000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-52300000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	21800000	USD
	us-gaap	Deferred Policy Acquisition Costs Period Increase Decrease DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease	43300000	USD
	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	243600000	USD
	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	291300000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	236700000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-5500000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	15000000.0	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-34900000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	231400000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	185500000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-6200000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-4800000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	54900000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	49500000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-20200000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-8500000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	942700000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	696200000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	606900000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	287200000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	811100000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1523600000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	187100000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	257400000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1906100000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1931300000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	153000000.0	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	308900000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1007200000	USD
	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	-30000000.0	USD
	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	-30000000.0	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	388300000	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	281500000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-601600000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	395900000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	290700000	USD
	us-gaap	Increase Decrease In Cash Collateral For Loaned Securities IncreaseDecreaseInCashCollateralForLoanedSecurities	-88500000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	64900000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	59600000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3500000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2600000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	200200000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	205800000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	110900000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	103300000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-27000000.0	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-26700000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	31300000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-72500000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-33200000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	22100000	USD
CY2018Q4	us-gaap	Cash Cash	94000000.0	USD
CY2017Q4	us-gaap	Cash Cash	77400000	USD
CY2019Q2	us-gaap	Cash Cash	60800000	USD
CY2018Q2	us-gaap	Cash Cash	99500000	USD
	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The accompanying consolidated financial statements of Unum Group and its subsidiaries (the Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. For further information, refer to the consolidated financial statements and footnotes included in our annual report on Form 10-K for the year ended </span><span style="font-family:inherit;font-size:10pt;">December 31, 2018</span><span style="font-family:inherit;font-size:10pt;">.</span></div><div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In our opinion, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Interim results are not necessarily indicative of full year performance.</span></div>
CY2018Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	3069200000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	789000000.0	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	109900000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	1762800000	USD
CY2018Q4	us-gaap	Taxes Payable Current And Noncurrent TaxesPayableCurrentAndNoncurrent	24000000.0	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9863100000	USD
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Accounting Updates Outstanding:</span><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"/></tr><tr><td style="width:15%;"/><td style="width:1%;"/><td style="width:47%;"/><td style="width:1%;"/><td style="width:14%;"/><td style="width:1%;"/><td style="width:21%;"/></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Description</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Date of Adoption</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Effect on Financial Statements</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC 326 "Financial Instruments - Credit Losses"</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">This update amends the guidance on the impairment of financial instruments. The update adds an impairment model known as the current expected credit loss model that is based on expected losses rather than incurred losses and will generally result in earlier recognition of allowances for losses. The current expected credit loss model applies to financial instruments such as mortgage loans, fixed maturity securities classified as held-to-maturity, and certain receivables. The update also modifies the other-than-temporary impairment model used for available-for-sale fixed maturity securities such that credit losses are recognized as an allowance rather than as a reduction in the amortized cost of the security. The reversal of previously recognized credit losses on available-for-sale fixed maturity securities is allowed under specified circumstances. Additional disclosures will also be required, including information used to develop the allowance for losses. The guidance is to be applied to most instruments in scope using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. For available-for-sale fixed maturity securities, the update is applied prospectively. Other-than-temporary impairment losses recognized on available-for-sale fixed maturity securities prior to adoption of the update cannot be reversed. Early adoption is permitted.</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">January 1, 2020</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We have determined that this guidance is primarily applicable to our mortgage loan investments and reinsurance recoverables. We are currently developing and implementing systems to support the expected credit loss projections for these asset types. We continue to evaluate the expected impact on our financial position, results of operations, and disclosures.</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC 350 "Intangibles - Goodwill and Other"</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">This update eliminates the requirement to calculate the implied fair value of goodwill (the second step in the current two-step test) to measure a goodwill impairment charge. Instead, entities should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the excess of the carrying amount over the fair value, with the loss not to exceed the total amount of goodwill allocated to that reporting unit. The guidance is to be applied prospectively, with early adoption permitted for goodwill impairment tests performed on testing dates after January 1, 2017.</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">January 1, 2020</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The adoption of this update will not have a material effect on our financial position or results of operations.</span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"/></tr><tr><td style="width:15%;"/><td style="width:1%;"/><td style="width:47%;"/><td style="width:1%;"/><td style="width:14%;"/><td style="width:1%;"/><td style="width:21%;"/></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Description</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Date of Adoption</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Effect on Financial Statements</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC 820 "Fair Value Measurement"</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">This update amended the fair value measurement guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removed certain disclosures related to Level 1 and Level 2 transfers and also removed the discussion regarding valuation processes of Level 3 fair value measurements. The update modifies guidance related to investments in certain entities that calculate net asset value to explicitly require disclosure regarding timing of liquidation of the investee's assets and timing of redemption restrictions. The update adds disclosures around the changes in unrealized gains and losses in other comprehensive income for recurring Level 3 investments held at the end of the reporting period and adds disclosures regarding certain unobservable inputs on Level 3 fair value measurements. The guidance was applied retrospectively or prospectively depending on the specific requirement of the update. Entities are permitted to early adopt any removed or modified disclosures and may delay adoption of the additional disclosures until their effective date.</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">December 31, 2018 for the removal and modification of certain disclosures and January 1, 2020 for the addition of certain disclosures.</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We elected to early adopt the removal and modification of disclosures, as permitted by the update. We have elected to delay the adoption of the additional disclosures until the effective date. The adoption of this update will modify our disclosures but will not have an impact on our financial position or results of operations.</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC 715 "Compensation - Retirement Benefits"</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">This update amends the defined benefit pension and other postretirement benefit guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removes the requirement to disclose the effects of a one-percentage point change in the assumed healthcare cost trend and the requirement to disclose amounts in accumulated other comprehensive income expected to be recognized as part of net periodic benefit cost of the next year. This update adds a requirement to describe the reasons for significant gains and losses related to changes in the benefit obligation for the period. The update also clarifies that the projected benefit obligation (PBO) and accumulated benefit obligation (ABO) and fair value of plan assets are to be disclosed for plans with PBOs or ABOs in excess of plan assets. The guidance is to be applied retrospectively and early adoption is permitted. </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">December 31, 2020</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We have not yet determined the expected impact on our disclosures.</span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="7"/></tr><tr><td style="width:15%;"/><td style="width:1%;"/><td style="width:47%;"/><td style="width:1%;"/><td style="width:14%;"/><td style="width:1%;"/><td style="width:21%;"/></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Description</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Date of Adoption</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Effect on Financial Statements</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:5px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">ASC 944 "Financial Services - Insurance"</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">This update significantly amends the accounting and disclosure requirements for long-duration insurance contracts. These changes include a requirement to review, and if necessary, update cash flow assumptions used to measure the liability for future policy benefits for traditional and limited-payment contracts at least annually, with changes recognized in earnings. In addition, an entity will be required to update the discount rate assumption at each reporting date using a yield that is reflective of an upper-medium grade fixed-income instrument, with changes recognized in other comprehensive income. These changes result in the elimination of the provision for risk of adverse deviation and premium deficiency (or loss recognition) testing. The update also requires that an entity measure all market risk benefits associated with deposit contracts at fair value, with changes recognized in earnings except for the portion attributable to a change in the instrument-specific credit risk, which is to be recognized in other comprehensive income. This update also simplifies the amortization of deferred acquisition costs by requiring amortization on a constant level basis over the expected term of the related contracts. Deferred acquisition costs are required to be written off for unexpected contract terminations but are no longer subject to an impairment test. Significant additional disclosures will also be required, which include disaggregated rollforwards of certain liability balances and the disclosure of qualitative and quantitative information about expected cash flows, estimates, and assumptions. The application of this guidance will vary based upon the specific requirements of the update but will generally result in either a modified retrospective or full retrospective approach with changes applied as of the beginning of the earliest period presented. Early adoption is permitted. </span></div><div style="font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">* In July 2019, the Financial Accounting Standards Board (FASB) voted to propose a one-year deferral of the effective date to January 1, 2022. The FASB is expected to issue a final amendment later in 2019 regarding the proposed deferral date.</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">January 1, 2021*</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We are currently evaluating the impact of the update and expect that the adoption may have a material impact on our financial position and results of operations. The update will also significantly expand our disclosures. </span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	30900000	USD
CY2019Q2	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-800000	USD
	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	4700000	USD
CY2018Q2	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-2300000	USD
	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-4000000.0	USD
CY2019Q2	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3348000000.0	USD
CY2018Q4	unm	Policy Loans Cededto Reinsurers PolicyLoansCededtoReinsurers	3449300000	USD
CY2019Q2	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	2343400000	USD
CY2019Q2	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	3756300000	USD
CY2019Q2	unm	Miscellaneous Long Term Investments MiscellaneousLongTermInvestments	93100000	USD
CY2019Q2	unm	Financial Instruments Financial Assets Fair Value Disclosure Total FinancialInstrumentsFinancialAssetsFairValueDisclosureTotal	6192800000	USD
CY2019Q2	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	3650900000	USD
CY2019Q2	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	2300000	USD
CY2019Q2	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	3653200000	USD
CY2018Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	2317400000	USD
CY2018Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	3831100000	USD
CY2018Q4	unm	Miscellaneous Long Term Investments MiscellaneousLongTermInvestments	115600000	USD
CY2018Q4	unm	Financial Instruments Financial Assets Fair Value Disclosure Total FinancialInstrumentsFinancialAssetsFairValueDisclosureTotal	6264100000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	104000000.0	USD
CY2018Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	2300000	USD
CY2018Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	3175500000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1082200000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities Within One Year Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedGainPositionGrossGain	17200000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities Within One Year Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedLossPositionGrossLoss	3300000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6228200000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedGainPositionGrossGain	433800000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedLossPositionGrossLoss	52100000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	13336400000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedGainPositionGrossGain	1477500000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedLossPositionGrossLoss	28800000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	18696200000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities After Ten Years Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedGainPositionGrossGain	3750200000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedLossPositionGrossLoss	63700000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal	39343000000.0	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Gain Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGainGrossSubtotal	5678700000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Loss Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossLossGrossSubtotal	147900000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	1461800000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedGainPositionGrossGain	105100000	USD
CY2019Q2	unm	Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedLossPositionGrossLoss	500000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	40804800000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5783800000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	148400000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1073300000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities Within One Year Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedGainPositionGrossGain	14500000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities Within One Year Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearUnrealizedLossPositionGrossLoss	8400000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	6267500000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedGainPositionGrossGain	300600000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsUnrealizedLossPositionGrossLoss	80200000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	12573400000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedGainPositionGrossGain	795000000.0	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsUnrealizedLossPositionGrossLoss	303900000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	18837200000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities After Ten Years Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedGainPositionGrossGain	2315600000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsUnrealizedLossPositionGrossLoss	355600000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedLossPositionGrossLoss	8300000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	40275200000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3492900000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities Amortized Cost Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostGrossSubtotal	38751400000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Gain Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossGainGrossSubtotal	3425700000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Loss Gross Subtotal AvailableForSaleSecuritiesDebtMaturitiesUnrealizedGainPositionGrossLossGrossSubtotal	748100000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	1523800000	USD
CY2018Q4	unm	Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Gain Position Gross Gain AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateUnrealizedGainPositionGrossGain	67200000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	756400000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	46440200000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5783800000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	148400000	USD
CY2019Q2	unm	Fixed Maturity Securities In Unrealized Loss Position Percent Of Total FixedMaturitySecuritiesInUnrealizedLossPositionPercentOfTotal	1.000
CY2019Q2	unm	Available For Sale Securities Other Than Temporary Impairments In Accumulated Other Comprehensive Income Loss AvailableForSaleSecuritiesOtherThanTemporaryImpairmentsInAccumulatedOtherComprehensiveIncomeLoss	0	USD
CY2019Q2	unm	Commitment To Fund Private Placement Fixed Maturity Securities CommitmentToFundPrivatePlacementFixedMaturitySecurities	103500000	USD
CY2019Q2	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	614900000	USD
CY2018Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	575300000	USD
CY2019Q2	us-gaap	Investment Tax Credit InvestmentTaxCredit	9400000	USD
CY2018Q2	us-gaap	Investment Tax Credit InvestmentTaxCredit	10300000	USD
	us-gaap	Investment Tax Credit InvestmentTaxCredit	18800000	USD
	us-gaap	Investment Tax Credit InvestmentTaxCredit	20700000	USD
CY2019Q2	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	6100000	USD
CY2018Q2	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	7000000.0	USD
	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	12900000	USD
	unm	Amortizationof Low Income Housing Investments AmortizationofLowIncomeHousingInvestments	14000000.0	USD
CY2019Q2	unm	Unfunded Commitment To Fund Tax Credit Partnership Investments UnfundedCommitmentToFundTaxCreditPartnershipInvestments	2300000	USD
CY2019Q2	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	3300000	USD
CY2018Q2	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	3300000	USD
	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	5900000	USD
	unm	Tax Benefitsfrom Low Income Housing Investments TaxBenefitsfromLowIncomeHousingInvestments	6700000	USD
CY2019Q2	unm	Loan To Value Ratio Maximum LoanToValueRatioMaximum	0.75
	unm	Loan To Value Ratio Update Frequency LoanToValueRatioUpdateFrequency	P3Y
	unm	Mortgage Loan Inspection Frequency MortgageLoanInspectionFrequency	P2Y
CY2019Q2	unm	Mortage Loan Policy Debt Service Coverage Ratio Lower Range MortageLoanPolicyDebtServiceCoverageRatioLowerRange	1.25
CY2019Q2	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2218900000	USD
CY2019Q2	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2018Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2295000000.0	USD
CY2018Q4	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2019Q2	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2218900000	USD
CY2019Q2	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2018Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2295000000.0	USD
CY2018Q4	unm	Percentage Of Loan Portfolio PercentageOfLoanPortfolio	1.000
CY2019Q2	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2218900000	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2295000000.0	USD
CY2019Q2	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2218900000	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	2295000000.0	USD
	unm	Number Of Changes To Accounting Policy For Estimating Credit Losses On Mortgage Loans NumberOfChangesToAccountingPolicyForEstimatingCreditLossesOnMortgageLoans	0
CY2019Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	0	USD
CY2018Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	0	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	300000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	0	USD
CY2019Q2	unm	Committments To Fund Commercial Mortgage Loans CommittmentsToFundCommercialMortgageLoans	87100000	USD
	us-gaap	Repurchase Agreements Maturities RepurchaseAgreementsMaturities	P30D
CY2019Q2	unm	Collateral Requirements Minimum Percentage Collateral To Fair Value Of Securities Loaned Or Purchased Under Repurchase Agreements CollateralRequirementsMinimumPercentageCollateralToFairValueOfSecuritiesLoanedOrPurchasedUnderRepurchaseAgreements	1.02
CY2019Q2	unm	Collateral Requirements Minimum Percentage Collateral To Fair Value Of Securities Loaned Or Purchased Under Repurchase Agreements CollateralRequirementsMinimumPercentageCollateralToFairValueOfSecuritiesLoanedOrPurchasedUnderRepurchaseAgreements	1.02
CY2019Q2	us-gaap	Securities Borrowed SecuritiesBorrowed	266700000	USD
CY2018Q4	us-gaap	Securities Borrowed SecuritiesBorrowed	164100000	USD
CY2019Q2	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2019Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	18500000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	24100000	USD
CY2019Q2	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	0	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	104000000.0	USD
CY2019Q2	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	401900000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	399700000	USD
CY2019Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	27400000	USD
CY2019Q2	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2019Q2	us-gaap	Derivative Assets DerivativeAssets	27400000	USD
CY2019Q2	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	5100000	USD
CY2019Q2	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	22300000	USD
CY2019Q2	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
CY2019Q2	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	266700000	USD
CY2019Q2	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2019Q2	us-gaap	Securities Borrowed Collateral Obligation To Return Cash SecuritiesBorrowedCollateralObligationToReturnCash	5800000	USD
CY2019Q2	us-gaap	Securities Borrowed Amount Offset Against Collateral SecuritiesBorrowedAmountOffsetAgainstCollateral	0	USD
CY2019Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	294100000	USD
CY2018Q4	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	100000	USD
CY2018Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2019Q2	us-gaap	Securities Borrowed SecuritiesBorrowed	266700000	USD
CY2019Q2	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	260900000	USD
CY2019Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability	0	USD
CY2019Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed	294100000	USD
CY2019Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	266000000.0	USD
CY2019Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash	28100000	USD
CY2019Q2	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	0	USD
CY2019Q2	us-gaap	Securities Loaned Gross SecuritiesLoanedGross	5800000	USD
CY2019Q2	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	0	USD
CY2019Q2	us-gaap	Securities Loaned SecuritiesLoaned	5800000	USD
CY2019Q2	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	5800000	USD
CY2019Q2	us-gaap	Securities Loaned Collateral Right To Reclaim Cash SecuritiesLoanedCollateralRightToReclaimCash	0	USD
CY2019Q2	us-gaap	Securities Loaned Amount Offset Against Collateral SecuritiesLoanedAmountOffsetAgainstCollateral	0	USD
CY2019Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	42000000.0	USD
CY2019Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	0	USD
CY2019Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned	42000000.0	USD
CY2019Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	37800000	USD
CY2019Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash	0	USD
CY2019Q2	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	4200000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	30900000	USD
CY2018Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	30900000	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	6900000	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	24000000.0	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	0	USD
CY2018Q4	us-gaap	Securities Borrowed Gross SecuritiesBorrowedGross	164100000	USD
CY2018Q4	us-gaap	Securities Borrowed Liability SecuritiesBorrowedLiability	0	USD
CY2018Q4	us-gaap	Securities Borrowed SecuritiesBorrowed	164100000	USD
CY2018Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Securities SecuritiesBorrowedCollateralObligationToReturnSecurities	164000000.0	USD
CY2018Q4	us-gaap	Securities Borrowed Collateral Obligation To Return Cash SecuritiesBorrowedCollateralObligationToReturnCash	100000	USD
CY2018Q4	us-gaap	Securities Borrowed Amount Offset Against Collateral SecuritiesBorrowedAmountOffsetAgainstCollateral	0	USD
CY2018Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Gross DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedGross	195000000.0	USD
CY2018Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Liability DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedLiability	0	USD
CY2018Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowed	195000000.0	USD
CY2018Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Securities DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnSecurities	170900000	USD
CY2018Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Collateral Obligation To Return Cash DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedCollateralObligationToReturnCash	24100000	USD
CY2018Q4	us-gaap	Derivative Asset Securities Purchased Under Agreements To Resell Securities Borrowed Amount Offset Against Collateral DerivativeAssetSecuritiesPurchasedUnderAgreementsToResellSecuritiesBorrowedAmountOffsetAgainstCollateral	0	USD
CY2018Q4	us-gaap	Securities Loaned SecuritiesLoaned	100000	USD
CY2018Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Securities SecuritiesLoanedCollateralRightToReclaimSecurities	100000	USD
CY2018Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	38100000	USD
CY2018Q4	us-gaap	Securities Loaned Collateral Right To Reclaim Cash SecuritiesLoanedCollateralRightToReclaimCash	0	USD
CY2018Q4	us-gaap	Securities Loaned Amount Offset Against Collateral SecuritiesLoanedAmountOffsetAgainstCollateral	0	USD
CY2018Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	0	USD
CY2018Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned	38100000	USD
CY2018Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	33300000	USD
CY2018Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash	0	USD
CY2018Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	4800000	USD
CY2019Q2	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	635400000	USD
CY2018Q2	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	635800000	USD
	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	1242400000	USD
	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	1251100000	USD
CY2019Q2	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	7300000	USD
CY2018Q2	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	8800000	USD
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	16300000	USD
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	18400000	USD
CY2019Q2	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	3200000	USD
CY2018Q2	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	3400000	USD
	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	6500000	USD
	unm	Investment Income On Pfa Assets InvestmentIncomeOnPfaAssets	6800000	USD
CY2019Q2	us-gaap	Net Investment Income NetInvestmentIncome	624900000	USD
CY2018Q2	us-gaap	Net Investment Income NetInvestmentIncome	623600000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	1219600000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	1225900000	USD
CY2019Q2	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	7900000	USD
CY2018Q2	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	2600000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	11200000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	4600000	USD
CY2019Q2	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	16900000	USD
CY2018Q2	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	3100000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	24800000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	4500000	USD
CY2019Q2	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	0	USD
CY2018Q2	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	0	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	0	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Portion Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesPortionRecognizedInEarnings	1000000.0	USD
CY2019Q2	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	3000000.0	USD
CY2018Q2	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	100000	USD
	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	3900000	USD
	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	170300000	USD
CY2018Q2	invest	Derivative Notional Amount DerivativeNotionalAmount	808000000.0	USD
CY2019Q1	invest	Derivative Notional Amount DerivativeNotionalAmount	808100000	USD
CY2019Q2	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	67500000	USD
	unm	Other Investments Gross Realized Gains OtherInvestmentsGrossRealizedGains	100000	USD
CY2019Q2	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	0	USD
CY2018Q2	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	0	USD
	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	100000	USD
	unm	Other Investments Gross Realized Losses OtherInvestmentsGrossRealizedLosses	0	USD
CY2019Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
CY2018Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	200000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	0	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	200000	USD
CY2019Q2	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-800000	USD
CY2018Q2	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-2300000	USD
	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	4700000	USD
	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-4000000.0	USD
CY2019Q2	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-900000	USD
CY2018Q2	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-600000	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	700000	USD
CY2019Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	400000	USD
CY2018Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	300000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-500000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-500000	USD
CY2019Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	-7300000	USD
CY2018Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	-2600000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-6200000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-4800000	USD
CY2019Q2	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	36200000	USD
CY2018Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	38000000.0	USD
CY2018Q1	invest	Derivative Notional Amount DerivativeNotionalAmount	881200000	USD
CY2018Q2	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	27100000	USD
CY2018Q2	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	100300000	USD
CY2018Q2	invest	Derivative Notional Amount DerivativeNotionalAmount	808000000.0	USD
CY2017Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	904500000	USD
	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	73800000	USD
CY2019Q2	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	55200000	USD
CY2019Q2	unm	Notional Amount Of Derivatives Foreign Currency NotionalAmountOfDerivativesForeignCurrency	-700000	USD
CY2019Q2	invest	Derivative Notional Amount DerivativeNotionalAmount	819700000	USD
CY2018Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	799200000	USD
	unm	Notional Amount Of Derivatives Additions NotionalAmountOfDerivativesAdditions	123100000	USD
	unm	Notional Amount Of Derivatives Terminations NotionalAmountOfDerivativesTerminations	102100000	USD
	unm	Notional Amount Of Derivatives Foreign Currency NotionalAmountOfDerivativesForeignCurrency	-500000	USD
CY2019Q2	invest	Derivative Notional Amount DerivativeNotionalAmount	819700000	USD
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	71700000	USD
CY2019Q2	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	1600000	USD
	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	1500000	USD
	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	1000000.0	USD
	us-gaap	Gain Loss From Hedged Firm Commitment Not Qualifying As Fair Value Hedge Net GainLossFromHedgedFirmCommitmentNotQualifyingAsFairValueHedgeNet	0	USD
CY2019Q2	us-gaap	Net Investment Income NetInvestmentIncome	624900000	USD
CY2019Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	-7300000	USD
CY2019Q2	us-gaap	Interest And Debt Expense InterestAndDebtExpense	42600000	USD
CY2018Q2	us-gaap	Net Investment Income NetInvestmentIncome	623600000	USD
CY2018Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	-2600000	USD
CY2018Q2	us-gaap	Interest And Debt Expense InterestAndDebtExpense	42400000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	1219600000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-6200000	USD
	us-gaap	Interest And Debt Expense InterestAndDebtExpense	84700000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	1225900000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-4800000	USD
	us-gaap	Interest And Debt Expense InterestAndDebtExpense	82600000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-276200000	USD
CY2019Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-502300000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	262800000	USD
CY2019Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	3000000.0	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	259800000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-242500000	USD
CY2018Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-82400000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-186700000	USD
CY2018Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	7100000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-193800000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-276200000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-814200000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	580000000.0	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	8300000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	571700000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-242500000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	127500000	USD
CY2017Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	-17500000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-372300000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	13900000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-386200000	USD
CY2019Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	100200000	USD
	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Changes in the liability for unpaid claims and claim adjustment expenses are as follows: </span></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:99.90338164251207%;border-collapse:collapse;text-align:left;"><tr><td colspan="8"/></tr><tr><td style="width:75%;"/><td style="width:1%;"/><td style="width:10%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:10%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">2019</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">2018</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:center;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">(in millions of dollars)</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Balance at January 1</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>23,149.0</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>23,222.0</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Less Reinsurance Recoverable</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>2,227.3</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>2,182.0</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Net Balance at January 1</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>20,921.7</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>21,040.0</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Incurred Related to</span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Current Year</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>3,101.9</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>2,943.0</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Prior Years</span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Interest</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>545.5</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>552.1</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> All Other Incurred</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(202.2</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(230.9</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Foreign Currency</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(8.5</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(44.7</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Total Incurred</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>3,436.7</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>3,219.5</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Paid Related to</span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Current Year</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(973.4</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(904.3</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Prior Years</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(2,542.1</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(2,498.4</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Total Paid</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(3,515.5</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>(3,402.7</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;height:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Net Balance at June 30</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>20,842.9</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>20,856.8</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> Plus Reinsurance Recoverable</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>2,247.7</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>2,188.4</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Balance at June 30</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>23,090.6</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>23,045.2</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	23149000000.0	USD
CY2019Q2	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	48889700000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	23222000000.0	USD
CY2018Q4	us-gaap	Reinsurance Receivables Incurred But Not Reported Claims ReinsuranceReceivablesIncurredButNotReportedClaims	2227300000	USD
CY2017Q4	us-gaap	Reinsurance Receivables Incurred But Not Reported Claims ReinsuranceReceivablesIncurredButNotReportedClaims	2182000000.0	USD
CY2018Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	20921700000	USD
CY2017Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	21040000000.0	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	3101900000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	2943000000.0	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	3436700000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	3219500000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	973400000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	904300000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	2542100000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	2498400000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	3515500000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	3402700000	USD
CY2019Q2	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	20842900000	USD
CY2018Q2	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	20856800000	USD
CY2019Q2	us-gaap	Reinsurance Receivables Incurred But Not Reported Claims ReinsuranceReceivablesIncurredButNotReportedClaims	2247700000	USD
CY2018Q2	us-gaap	Reinsurance Receivables Incurred But Not Reported Claims ReinsuranceReceivablesIncurredButNotReportedClaims	2188400000	USD
CY2019Q2	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	23090600000	USD
CY2018Q2	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	23045200000	USD
CY2019Q2	us-gaap	Liability For Claims And Claims Adjustment Expense Disability Accident And Health LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth	1751400000	USD
CY2018Q2	us-gaap	Liability For Claims And Claims Adjustment Expense Disability Accident And Health LiabilityForClaimsAndClaimsAdjustmentExpenseDisabilityAccidentAndHealth	1625400000	USD
CY2019Q2	us-gaap	Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense	47138300000	USD
CY2018Q2	us-gaap	Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense	43959400000	USD
CY2018Q2	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	45584800000	USD
CY2019Q2	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	8335100000	USD
CY2018Q2	unm	Life Reserves For Future Policy And Contract Benefits LifeReservesForFuturePolicyAndContractBenefits	8276900000	USD
CY2019Q2	unm	Accident And Health Active Life Reserves AccidentAndHealthActiveLifeReserves	12008300000	USD
CY2018Q2	unm	Accident And Health Active Life Reserves AccidentAndHealthActiveLifeReserves	10895600000	USD
CY2019Q2	unm	Unrealized Adjustment To Reserves For Future Policy And Contract Benefits UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits	5455700000	USD
CY2018Q2	unm	Unrealized Adjustment To Reserves For Future Policy And Contract Benefits UnrealizedAdjustmentToReservesForFuturePolicyAndContractBenefits	3367100000	USD
CY2019Q2	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	23090600000	USD
CY2018Q2	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	23045200000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	Integer
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	281200000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	285500000	USD
	us-gaap	Net Income Loss NetIncomeLoss	562100000	USD
	us-gaap	Net Income Loss NetIncomeLoss	559000000.0	USD
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	211068700	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	220776700	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	212672800	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	221335700	shares
CY2019Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	43900	shares
CY2018Q2	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	286000.0	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	88300	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	484500	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	211112600	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	221062700	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	212761100	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.53
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	221820200	shares
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.64
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.64
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.52
	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit	23.35
	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	24.25
	unm	Outstanding Restricted Stock Unit Grant Prices Lower Limit OutstandingRestrictedStockUnitGrantPricesLowerLimit	33.28
	unm	Outstanding Restricted Stock Unit Grant Prices Upper Limit OutstandingRestrictedStockUnitGrantPricesUpperLimit	55.26
	unm	Outstanding Performance Share Unit Awards Grant Price Range Lower Limit OutstandingPerformanceShareUnitAwardsGrantPriceRangeLowerLimit	37.67
	unm	Outstanding Performance Share Unit Awards Grant Price Range Upper Limit OutstandingPerformanceShareUnitAwardsGrantPriceRangeUpperLimit	49.86
CY2019Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1200000	shares
CY2018Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	700000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	400000	shares
CY2019Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2900000	shares
CY2018Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2500000	shares
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	5600000	shares
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	4400000	shares
CY2018Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	100100000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	200200000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	200300000	USD
CY2019Q2	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	200000	USD
	unm	Shares Repurchased Cost Commissions SharesRepurchasedCostCommissions	200000	USD
CY2019Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000.0	shares
CY2019Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2019Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	7100000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	14600000	USD
CY2019Q2	us-gaap	Sublease Income SubleaseIncome	400000	USD
	us-gaap	Sublease Income SubleaseIncome	800000	USD
CY2019Q2	us-gaap	Lease Cost LeaseCost	6700000	USD
	us-gaap	Lease Cost LeaseCost	13800000	USD
CY2019Q2	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	7300000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	14600000	USD
CY2019Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2019Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0468	Rate
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	13900000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	25000000.0	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	21500000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	18000000.0	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	12400000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	49500000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	140300000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	22800000	USD
CY2019Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	117500000	USD
CY2019Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	111500000	USD

Files In Submission

Name	View Source	Status
0000005513-19-000122-index-headers.html	Edgar Link	pending
0000005513-19-000122-index.html	Edgar Link	pending
0000005513-19-000122.txt	Edgar Link	pending
0000005513-19-000122-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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report.css	Edgar Link	pending
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unm-20190630.xsd	Edgar Link	pending
unm-20190630_cal.xml	Edgar Link	unprocessable
unm-20190630_def.xml	Edgar Link	unprocessable
unm-20190630_lab.xml	Edgar Link	unprocessable
unm-20190630_pre.xml	Edgar Link	unprocessable
unm06302019-10xq.htm	Edgar Link	pending
unm06302019-10xq_htm.xml	Edgar Link	completed
unm06302019ex101.htm	Edgar Link	pending
unm06302019ex311.htm	Edgar Link	pending
unm06302019ex312.htm	Edgar Link	pending
unm06302019ex321.htm	Edgar Link	pending
unm06302019ex322.htm	Edgar Link	pending

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$UNM
Unum Group Stock $unm

2019 Q2 Form 10-Q Financial Statement

#000000551319000122 Filed on July 31, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UNM Unum Group Stock $unm

2019 Q2 Form 10-Q Financial Statement

#000000551319000122 Filed on July 31, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$UNM
Unum Group Stock $unm