$HUM
HUMANA INC Stock $hum

$hum Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000004907119000023 Filed on February 21, 2019

Income Statement

Concept	2018 Q4	2017 Q4	2017 Q3
Revenue	$14.17B	$13.19B	$13.28B
YoY Change	7.42%	2.41%	-3.01%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin			$1.688B
YoY Change			-2.93%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$134.0M	$128.0M	$120.0M
YoY Change	4.69%	9.4%	2.56%
% of Gross Profit
Operating Expenses	$13.65B	$12.61B	$1.688B
YoY Change	8.24%	-5.29%	-2.93%
Operating Profit			$858.0M
YoY Change			-9.59%
Interest Expense	-$59.00M	-$76.00M	$59.00M
YoY Change	-22.37%	58.33%	25.53%
% of Operating Profit			6.88%
Other Income/Expense, Net	-$22.00M		$0.00
YoY Change
Pretax Income	$436.0M	$490.0M	$799.0M
YoY Change	-11.02%	-200.82%	-11.42%
Income Tax	$83.00M	$173.0M	$300.0M
% Of Pretax Income	19.04%	35.31%	37.55%
Net Earnings	$355.0M	$184.0M	$499.0M
YoY Change	92.93%	-145.89%	10.89%
Net Earnings / Revenue	2.51%	1.4%	3.76%
Basic Earnings Per Share	$2.60	$1.30	$3.46
Diluted Earnings Per Share	$2.58	$1.29	$3.44
COMMON SHARES
Basic Shares Outstanding			144.2M shares
Diluted Shares Outstanding			145.4M shares

Balance Sheet

Concept	2018 Q4	2017 Q4	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$12.37B	$13.60B	$18.49B
YoY Change	-9.04%	18.54%	31.13%
Cash & Equivalents	$2.343B	$4.042B	$9.865B
Short-Term Investments	$10.03B	$9.557B	$8.622B
Other Short-Term Assets	$3.564B	$2.949B	$3.776B
YoY Change	20.85%	-14.22%	-21.19%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$16.95B	$17.40B	$23.19B
YoY Change	-2.61%	7.49%	17.97%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.735B	$1.584B	$1.560B
YoY Change	9.53%	5.25%	5.55%
Goodwill	$3.897B	$3.281B	$3.281B
YoY Change	18.77%	0.28%	0.28%
Intangibles	$245.0M	$226.0M	$227.0M
YoY Change	8.41%	-19.29%	-23.83%
Long-Term Investments	$1.047B	$0.00	$11.34B
YoY Change		-100.0%	18.08%
Other Assets	$1.375B	$2.166B	$2.214B
YoY Change	-36.52%	-2.7%	-20.62%
Total Long-Term Assets	$8.465B	$9.776B	$9.771B
YoY Change	-13.41%	6.19%	-0.42%
TOTAL ASSETS
Total Short-Term Assets	$16.95B	$17.40B	$23.19B
Total Long-Term Assets	$8.465B	$9.776B	$9.771B
Total Assets	$25.41B	$27.18B	$32.96B
YoY Change	-6.49%	7.02%	11.84%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.067B	$4.069B	$4.888B
YoY Change	-24.63%	64.94%	66.66%
Accrued Expenses
YoY Change
Deferred Revenue	$283.0M	$378.0M
YoY Change	-25.13%
Short-Term Debt	$1.694B	$150.0M	$953.0M
YoY Change	1029.33%	-50.0%	217.67%
Long-Term Debt Due	$1.694B	$150.0M
YoY Change	1029.33%	-50.0%
Total Short-Term Liabilities	$10.08B	$9.406B	$14.42B
YoY Change	7.13%	20.25%	22.02%
LONG-TERM LIABILITIES
Long-Term Debt	$4.375B	$4.770B	$3.977B
YoY Change	-8.28%	25.79%	4.88%
Other Long-Term Liabilities	$581.0M	$237.0M	$457.0M
YoY Change	145.15%	-9.89%	63.8%
Total Long-Term Liabilities	$4.956B	$5.007B	$4.434B
YoY Change	-1.02%	23.48%	8.92%
TOTAL LIABILITIES
Total Short-Term Liabilities	$10.08B	$9.406B	$14.42B
Total Long-Term Liabilities	$4.956B	$5.007B	$4.434B
Total Liabilities	$15.25B	$17.34B	$21.75B
YoY Change	-12.02%	17.84%	19.6%
SHAREHOLDERS EQUITY
Retained Earnings	$15.07B	$13.67B	$13.54B
YoY Change	10.26%	19.35%	13.81%
Common Stock	$2.568B	$2.478B	$2.674B
YoY Change	3.63%	-4.51%	4.45%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$7.320B	$6.325B	$5.017B
YoY Change	15.73%	91.78%	52.68%
Treasury Stock Shares	63.03M shares	60.89M shares	55.71M shares
Shareholders Equity	$10.16B	$9.842B	$11.21B
YoY Change
Total Liabilities & Shareholders Equity	$25.41B	$27.18B	$32.96B
YoY Change	-6.49%	7.02%	11.84%

Cashflow Statement

Concept	2018 Q4	2017 Q4	2017 Q3
OPERATING ACTIVITIES
Net Income	$355.0M	$184.0M	$499.0M
YoY Change	92.93%	-145.89%	10.89%
Depreciation, Depletion And Amortization	$134.0M	$128.0M	$120.0M
YoY Change	4.69%	9.4%	2.56%
Cash From Operating Activities	-$333.0M	-$2.911B	$2.863B
YoY Change	-88.56%	4.98%	-36.42%
INVESTING ACTIVITIES
Capital Expenditures	-$176.0M	-$150.0M	-$143.0M
YoY Change	17.33%	13.64%	2.88%
Acquisitions
YoY Change
Other Investing Activities	-$271.0M	-$1.015B	-$555.0M
YoY Change	-73.3%	45.83%	466.33%
Cash From Investing Activities	-$447.0M	-$1.165B	-$698.0M
YoY Change	-61.63%	40.7%	194.51%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.019B	-1.747B	-439.0M
YoY Change	-41.67%	-346.4%	-693.24%
NET CHANGE
Cash From Operating Activities	-333.0M	-2.911B	2.863B
Cash From Investing Activities	-447.0M	-1.165B	-698.0M
Cash From Financing Activities	-1.019B	-1.747B	-439.0M
Net Change In Cash	-1.799B	-5.823B	1.726B
YoY Change	-69.11%	101.35%	-60.23%
FREE CASH FLOW
Cash From Operating Activities	-$333.0M	-$2.911B	$2.863B
Capital Expenditures	-$176.0M	-$150.0M	-$143.0M
Free Cash Flow	-$157.0M	-$2.761B	$3.006B
YoY Change	-94.31%	4.54%	-35.24%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000049071
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	135566909	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	41129697151	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	HUMANA INC
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2018	dei	Trading Symbol TradingSymbol	HUM
CY2017Q4	hum	Accrued Pharmaceutical Rebates Current AccruedPharmaceuticalRebatesCurrent	1200000000	USD
CY2018Q4	hum	Accrued Pharmaceutical Rebates Current AccruedPharmaceuticalRebatesCurrent	1300000000	USD
CY2017	hum	Adjustment To Future Policy Benefits Assuming Unrealized Gains On Investments Realized And Reinvested At Current Yields AdjustmentToFuturePolicyBenefitsAssumingUnrealizedGainsOnInvestmentsRealizedAndReinvestedAtCurrentYields	168000000	USD
CY2018	hum	Amount Held In Cash And Securities In Trust At Least Equal To Recoverable From Reinsurer AmountHeldInCashAndSecuritiesInTrustAtLeastEqualToRecoverableFromReinsurer	110000000	USD
CY2016	hum	Benefit Expenses Associated With Military Services And Provisions Associated With Future Policy Benefits BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits	271000000	USD
CY2017	hum	Benefit Expenses Associated With Military Services And Provisions Associated With Future Policy Benefits BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits	-22000000	USD
CY2018	hum	Benefit Expenses Associated With Military Services And Provisions Associated With Future Policy Benefits BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits	0	USD
CY2018Q4	hum	Closing Stock Price ClosingStockPrice	286.48
CY2018	hum	Combination Of Age And Years Necessary For Retirement Provision As Related To Our Equity Award Program CombinationOfAgeAndYearsNecessaryForRetirementProvisionAsRelatedToOurEquityAwardProgram	P65Y
CY2016	hum	Comprehensive Income Loss Netof Tax Attributable To Equity Method Investments ComprehensiveIncomeLossNetofTaxAttributableToEquityMethodInvestments	0	USD
CY2017	hum	Comprehensive Income Loss Netof Tax Attributable To Equity Method Investments ComprehensiveIncomeLossNetofTaxAttributableToEquityMethodInvestments	0	USD
CY2018	hum	Comprehensive Income Loss Netof Tax Attributable To Equity Method Investments ComprehensiveIncomeLossNetofTaxAttributableToEquityMethodInvestments	-4000000	USD
CY2018	hum	Consumer Discounts On Brand Name Prescription Drugs ConsumerDiscountsOnBrandNamePrescriptionDrugs	0.5
CY2018Q4	hum	Debt Instrument Covenant Debt To Capitalization Percentage DebtInstrumentCovenantDebtToCapitalizationPercentage	0.37
CY2018Q4	hum	Debt Instrument Covenant Debt To Capitalization Percentage Maximum DebtInstrumentCovenantDebtToCapitalizationPercentageMaximum	0.5
CY2018Q4	hum	Debt Securities Availableforsale Qualitative Disclosure Numberof Positions DebtSecuritiesAvailableforsaleQualitativeDisclosureNumberofPositions	1500	position
CY2017Q4	hum	Deferred Tax Assets Deferred Policy Acquisition Cost DeferredTaxAssetsDeferredPolicyAcquisitionCost	48000000	USD
CY2018Q4	hum	Deferred Tax Assets Deferred Policy Acquisition Cost DeferredTaxAssetsDeferredPolicyAcquisitionCost	17000000	USD
CY2017Q4	hum	Deferred Tax Assets Future Policy Benefits Payable DeferredTaxAssetsFuturePolicyBenefitsPayable	231000000	USD
CY2018Q4	hum	Deferred Tax Assets Future Policy Benefits Payable DeferredTaxAssetsFuturePolicyBenefitsPayable	0	USD
CY2017Q4	hum	Deferred Tax Liabilities Depreciable Property And Intangible Assets DeferredTaxLiabilitiesDepreciablePropertyAndIntangibleAssets	237000000	USD
CY2018Q4	hum	Deferred Tax Liabilities Depreciable Property And Intangible Assets DeferredTaxLiabilitiesDepreciablePropertyAndIntangibleAssets	273000000	USD
CY2017Q4	hum	Deferred Tax Liabilities Future Policy Benefits Payable DeferredTaxLiabilitiesFuturePolicyBenefitsPayable	0	USD
CY2018Q4	hum	Deferred Tax Liabilities Future Policy Benefits Payable DeferredTaxLiabilitiesFuturePolicyBenefitsPayable	5000000	USD
CY2016	hum	Depreciation And Amortization Classified As Benefit Expense DepreciationAndAmortizationClassifiedAsBenefitExpense	111000000	USD
CY2017	hum	Depreciation And Amortization Classified As Benefit Expense DepreciationAndAmortizationClassifiedAsBenefitExpense	107000000	USD
CY2018	hum	Depreciation And Amortization Classified As Benefit Expense DepreciationAndAmortizationClassifiedAsBenefitExpense	129000000	USD
CY2016	hum	Depreciation And Amortization Income Statement DepreciationAndAmortizationIncomeStatement	354000000	USD
CY2017	hum	Depreciation And Amortization Income Statement DepreciationAndAmortizationIncomeStatement	378000000	USD
CY2018	hum	Depreciation And Amortization Income Statement DepreciationAndAmortizationIncomeStatement	405000000	USD
CY2016	hum	Dividends To Parent Without Prior State Regulatory Approval DividendsToParentWithoutPriorStateRegulatoryApproval	800000000	USD
CY2017	hum	Dividends To Parent Without Prior State Regulatory Approval DividendsToParentWithoutPriorStateRegulatoryApproval	1400000000	USD
CY2018	hum	Dividends To Parent Without Prior State Regulatory Approval DividendsToParentWithoutPriorStateRegulatoryApproval	2300000000	USD
CY2016	hum	Effective Income Tax Rate Reconciliation Health Insurer Fee Amount EffectiveIncomeTaxRateReconciliationHealthInsurerFeeAmount	336000000	USD
CY2017	hum	Effective Income Tax Rate Reconciliation Health Insurer Fee Amount EffectiveIncomeTaxRateReconciliationHealthInsurerFeeAmount	0	USD
CY2018	hum	Effective Income Tax Rate Reconciliation Health Insurer Fee Amount EffectiveIncomeTaxRateReconciliationHealthInsurerFeeAmount	243000000	USD
CY2016	hum	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options And Restricted Stock Vesting EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptionsAndRestrictedStockVesting	53000000	USD
CY2017	hum	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options And Restricted Stock Vesting EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptionsAndRestrictedStockVesting	68000000	USD
CY2018	hum	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options And Restricted Stock Vesting EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptionsAndRestrictedStockVesting	49000000	USD
CY2017	hum	Estimated Charges Per Diluted Share EstimatedChargesPerDilutedShare	0.64
CY2016	hum	Favorable Medical Claims Reserve Development Related To Prior Fiscal Years FavorableMedicalClaimsReserveDevelopmentRelatedToPriorFiscalYears	582000000	USD
CY2017	hum	Favorable Medical Claims Reserve Development Related To Prior Fiscal Years FavorableMedicalClaimsReserveDevelopmentRelatedToPriorFiscalYears	483000000	USD
CY2018	hum	Favorable Medical Claims Reserve Development Related To Prior Fiscal Years FavorableMedicalClaimsReserveDevelopmentRelatedToPriorFiscalYears	503000000	USD
CY2017Q4	hum	Gain Contingency Recovery Sought GainContingencyRecoverySought	611000000	USD
CY2016	hum	Government And Health Plan Member Subsidies Amount GovernmentAndHealthPlanMemberSubsidiesAmount	13400000000	USD
CY2017	hum	Government And Health Plan Member Subsidies Amount GovernmentAndHealthPlanMemberSubsidiesAmount	13500000000	USD
CY2018	hum	Government And Health Plan Member Subsidies Amount GovernmentAndHealthPlanMemberSubsidiesAmount	13400000000	USD
CY2016	hum	Health Care Cost Payments HealthCareCostPayments	3300000000	USD
CY2017	hum	Health Care Cost Payments HealthCareCostPayments	3400000000	USD
CY2018	hum	Health Care Cost Payments HealthCareCostPayments	5600000000	USD
CY2016Q4	hum	Health Care Reform Premium Deficiency Reserve HealthCareReformPremiumDeficiencyReserve	176000000	USD
CY2016	hum	Health Care Reform Premium Deficiency Reserve Change In Estimate HealthCareReformPremiumDeficiencyReserveChangeInEstimate	208000000	USD
CY2016	hum	Health Care Reform Premium Deficiency Reserve Current Period Loss HealthCareReformPremiumDeficiencyReserveCurrentPeriodLoss	384000000	USD
CY2015Q4	hum	Health Care Reform Provisionfor Premium Deficiency HealthCareReformProvisionforPremiumDeficiency	176000000	USD
CY2016Q4	hum	Health Care Reform Provisionfor Premium Deficiency HealthCareReformProvisionforPremiumDeficiency	0	USD
CY2017Q4	hum	Health Care Reform Provisionfor Premium Deficiency HealthCareReformProvisionforPremiumDeficiency	0	USD
CY2018Q4	hum	Health Care Reform Provisionfor Premium Deficiency HealthCareReformProvisionforPremiumDeficiency	0	USD
CY2016	hum	Health Care Reform Provisionfor Premium Deficiency1 HealthCareReformProvisionforPremiumDeficiency1	-176000000	USD
CY2017	hum	Health Care Reform Provisionfor Premium Deficiency1 HealthCareReformProvisionforPremiumDeficiency1	0	USD
CY2018	hum	Health Care Reform Provisionfor Premium Deficiency1 HealthCareReformProvisionforPremiumDeficiency1	0	USD
CY2016Q4	hum	Increase To Future Policy Benefits Payable IncreaseToFuturePolicyBenefitsPayable	659000000	USD
CY2016Q4	hum	Increase To Reinsurance Recoverable IncreaseToReinsuranceRecoverable	154000000	USD
CY2016	hum	Long Term Insurance Reserve Strengthening Expense LongTermInsuranceReserveStrengtheningExpense	505000000	USD
CY2018	hum	Maximum Deductibility Of Annual Compensation Per Employee As Mandated By Health Reforms MaximumDeductibilityOfAnnualCompensationPerEmployeeAsMandatedByHealthReforms	500000	USD
CY2018	hum	Maximum Percentage Of Any General Obligation Bonds In One State MaximumPercentageOfAnyGeneralObligationBondsInOneState	0.09
CY2016	hum	Merger Termination Fee And Related Costs Net MergerTerminationFeeAndRelatedCostsNet	104000000	USD
CY2017	hum	Merger Termination Fee And Related Costs Net MergerTerminationFeeAndRelatedCostsNet	-936000000	USD
CY2018	hum	Merger Termination Fee And Related Costs Net MergerTerminationFeeAndRelatedCostsNet	0	USD
CY2016	hum	Military Services Benefit Expense Benefit MilitaryServicesBenefitExpenseBenefit	8000000	USD
CY2017	hum	Military Services Benefit Expense Benefit MilitaryServicesBenefitExpenseBenefit	0	USD
CY2018	hum	Military Services Benefit Expense Benefit MilitaryServicesBenefitExpenseBenefit	0	USD
CY2018	hum	Minimum Age Required For Retirement Eligibility As Related To Our Equity Award Program MinimumAgeRequiredForRetirementEligibilityAsRelatedToOurEquityAwardProgram	P55Y
CY2018	hum	Minimum Number Of Years Of Service For Retirement Eligibility As Related To Our Equity Award Program MinimumNumberOfYearsOfServiceForRetirementEligibilityAsRelatedToOurEquityAwardProgram	P5Y
CY2017Q4	hum	Net Asset Liability Deferred Acquisition Cost NetAssetLiabilityDeferredAcquisitionCost	103000000	USD
CY2018Q4	hum	Net Asset Liability Deferred Acquisition Cost NetAssetLiabilityDeferredAcquisitionCost	36000000	USD
CY2017Q4	hum	Net Asset Liability Future Policy Benefits Payable NetAssetLiabilityFuturePolicyBenefitsPayable	2979000000	USD
CY2018Q4	hum	Net Asset Liability Future Policy Benefits Payable NetAssetLiabilityFuturePolicyBenefitsPayable	219000000	USD
CY2018Q4	hum	Net Operating Lease Commitment Thereafter NetOperatingLeaseCommitmentThereafter	27000000	USD
CY2018Q4	hum	Net Operating Lease Commitment Total NetOperatingLeaseCommitmentTotal	443000000	USD
CY2018Q4	hum	Net Operating Lease Commitment Within Year Five NetOperatingLeaseCommitmentWithinYearFive	25000000	USD
CY2018Q4	hum	Net Operating Lease Commitment Within Year Four NetOperatingLeaseCommitmentWithinYearFour	70000000	USD
CY2018Q4	hum	Net Operating Lease Commitment Within Year One NetOperatingLeaseCommitmentWithinYearOne	134000000	USD
CY2018Q4	hum	Net Operating Lease Commitment Within Year Three NetOperatingLeaseCommitmentWithinYearThree	86000000	USD
CY2018Q4	hum	Net Operating Lease Commitment Within Year Two NetOperatingLeaseCommitmentWithinYearTwo	101000000	USD
CY2018	hum	Number Of Days Notice For Employer Group To Cancel Short Duration Prepaid Health Services Policies NumberOfDaysNoticeForEmployerGroupToCancelShortDurationPrepaidHealthServicesPolicies	P30D
CY2018	hum	Number Of Reinsurers Comprising Other Reinsurance Recoverables Balance NumberOfReinsurersComprisingOtherReinsuranceRecoverablesBalance	10	Reinsurer
CY2018Q4	hum	Number Of Shares Of Our Common Stock Reserved For Issuance Under Our Defined Contribution Retirement Savings Plans NumberOfSharesOfOurCommonStockReservedForIssuanceUnderOurDefinedContributionRetirementSavingsPlans	2000000	shares
CY2018Q4	hum	Number Of States Comprising Tricare Beneficiaries NumberOfStatesComprisingTRICAREBeneficiaries	32	State
CY2018Q1	hum	Number Of Tricare Beneficiaries NumberOfTRICAREBeneficiaries	6000000	beneficiary
CY2016	hum	Operating Lease Rental Expenses Net OperatingLeaseRentalExpensesNet	153000000	USD
CY2017	hum	Operating Lease Rental Expenses Net OperatingLeaseRentalExpensesNet	171000000	USD
CY2018	hum	Operating Lease Rental Expenses Net OperatingLeaseRentalExpensesNet	135000000	USD
CY2018	hum	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Including Equity Method Investments OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentIncludingEquityMethodInvestments	-182000000	USD
CY2017Q4	hum	Other Long Term Assets Deferred Acquisition Costs OtherLongTermAssetsDeferredAcquisitionCosts	103000000	USD
CY2018Q4	hum	Other Long Term Assets Deferred Acquisition Costs OtherLongTermAssetsDeferredAcquisitionCosts	36000000	USD
CY2017Q4	hum	Other Long Term Assets Future Policy Benefits Payable OtherLongTermAssetsFuturePolicyBenefitsPayable	0	USD
CY2018Q4	hum	Other Long Term Assets Future Policy Benefits Payable OtherLongTermAssetsFuturePolicyBenefitsPayable	0	USD
CY2017Q4	hum	Other Long Term Liabilities Deferred Acquisition Cost OtherLongTermLiabilitiesDeferredAcquisitionCost	0	USD
CY2018Q4	hum	Other Long Term Liabilities Deferred Acquisition Cost OtherLongTermLiabilitiesDeferredAcquisitionCost	0	USD
CY2017	hum	Percent Of Consolidated Premiums And Services Revenues Related To Long Duration Insurance Products PercentOfConsolidatedPremiumsAndServicesRevenuesRelatedToLongDurationInsuranceProducts	0.01
CY2018	hum	Percent Of Consolidated Premiums And Services Revenues Related To Long Duration Insurance Products PercentOfConsolidatedPremiumsAndServicesRevenuesRelatedToLongDurationInsuranceProducts	0.01
CY2018	hum	Percentage Of Retirement And Savings Plan S Assets Invested In Our Common Stock As Compared To Company S Outstanding Shares At Year End PercentageOfRetirementAndSavingsPlanSAssetsInvestedInOurCommonStockAsComparedToCompanySOutstandingSharesAtYearEnd	0.013
CY2018	hum	Percentage Of Retirement And Savings Plan S Assets Invested In Our Company Common Stock PercentageOfRetirementAndSavingsPlanSAssetsInvestedInOurCompanyCommonStock	0.12
CY2018Q4	hum	Percentage Of Total Debt Securities PercentageOfTotalDebtSecurities	0.97
CY2016	hum	Percentage Of Total Premium And Services Revenues Derived From Contracts With Federal Government PercentageOfTotalPremiumAndServicesRevenuesDerivedFromContractsWithFederalGovernment	0.75
CY2017	hum	Percentage Of Total Premium And Services Revenues Derived From Contracts With Federal Government PercentageOfTotalPremiumAndServicesRevenuesDerivedFromContractsWithFederalGovernment	0.79
CY2018	hum	Percentage Of Total Premium And Services Revenues Derived From Contracts With Federal Government PercentageOfTotalPremiumAndServicesRevenuesDerivedFromContractsWithFederalGovernment	0.81
CY2016Q4	hum	Premiums Reduction Write Off Of Risk Corridor Receivables PremiumsReductionWriteOffOfRiskCorridorReceivables	583000000	USD
CY2016	hum	Proceeds From Stock Options Exercised And Other ProceedsFromStockOptionsExercisedAndOther	11000000	USD
CY2017	hum	Proceeds From Stock Options Exercised And Other ProceedsFromStockOptionsExercisedAndOther	62000000	USD
CY2018	hum	Proceeds From Stock Options Exercised And Other ProceedsFromStockOptionsExercisedAndOther	45000000	USD
CY2017Q3	hum	Restructuring And Related Cost Expected Number Of Positions Eliminated Period Percent RestructuringAndRelatedCostExpectedNumberOfPositionsEliminatedPeriodPercent	0.078
CY2016	hum	Share Repurchases Related To Employee Stock Based Compensation Awards Shares ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsShares	600000	shares
CY2017	hum	Share Repurchases Related To Employee Stock Based Compensation Awards Shares ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsShares	500000	shares
CY2018	hum	Share Repurchases Related To Employee Stock Based Compensation Awards Shares ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsShares	400000	shares
CY2016	hum	Share Repurchases Related To Employee Stock Based Compensation Awards Value ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	104000000	USD
CY2017	hum	Share Repurchases Related To Employee Stock Based Compensation Awards Value ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	115000000	USD
CY2018	hum	Share Repurchases Related To Employee Stock Based Compensation Awards Value ShareRepurchasesRelatedToEmployeeStockBasedCompensationAwardsValue	116000000	USD
CY2018Q4	hum	Shares Of Retirement And Savings Plans Invested In Our Companys Common Stock SharesOfRetirementAndSavingsPlansInvestedInOurCompanysCommonStock	1800000	shares
CY2016	hum	Stock Based Compensation Expense Net Of Tax StockBasedCompensationExpenseNetOfTax	95000000	USD
CY2017	hum	Stock Based Compensation Expense Net Of Tax StockBasedCompensationExpenseNetOfTax	125000000	USD
CY2018	hum	Stock Based Compensation Expense Net Of Tax StockBasedCompensationExpenseNetOfTax	116000000	USD
CY2017	hum	Tax Cuts And Jobs Actof2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsAndJobsActof2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	133000000	USD
CY2018	hum	Tax Cutsand Jobs Actof2017 Measurement Period Adjustment Income Tax Expense Benefit TaxCutsandJobsActof2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit	-39000000	USD
CY2017Q4	hum	Trade Accounts Payable And Accrued Expenses Deferred Acquisition Cost TradeAccountsPayableAndAccruedExpensesDeferredAcquisitionCost	0	USD
CY2018Q4	hum	Trade Accounts Payable And Accrued Expenses Deferred Acquisition Cost TradeAccountsPayableAndAccruedExpensesDeferredAcquisitionCost	0	USD
CY2017Q4	hum	Trade Accounts Payable And Accrued Expenses Future Policy Benefits Payable TradeAccountsPayableAndAccruedExpensesFuturePolicyBenefitsPayable	56000000	USD
CY2018Q4	hum	Trade Accounts Payable And Accrued Expenses Future Policy Benefits Payable TradeAccountsPayableAndAccruedExpensesFuturePolicyBenefitsPayable	0	USD
CY2018	hum	Typical Term In Years Of Short Duration Employer Group Prepaid Health Services Policies TypicalTermInYearsOfShortDurationEmployerGroupPrepaidHealthServicesPolicies	P1Y
CY2017Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	4069000000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	3067000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1976000000	USD
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CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	31000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	34000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	67000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	770000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	827000000	USD
CY2018Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions FutureMinimumSubleaseRentalsSaleLeasebackTransactions	76000000	USD
CY2018Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Thereafter FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter	23000000	USD
CY2018Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Five Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears	9000000	USD
CY2018Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Four Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears	9000000	USD
CY2018Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within One Year FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear	13000000	USD
CY2018Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Three Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears	10000000	USD
CY2018Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Two Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears	12000000	USD
CY2016	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2017	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-786000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	3272000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	3281000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	3897000000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	9000000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	616000000	USD
CY2018	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	12000000	USD
CY2016	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2017	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2018	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1552000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4020000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2074000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1552000000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1689000000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1042000000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	799000000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	490000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4020000000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	707000000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	19000000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	901000000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	436000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2063000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	11000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	938000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1572000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	391000000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	133000000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-39000000	USD
CY2016	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness	0	USD
CY2017	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness	0	USD
CY2018	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness	-272000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	543000000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1407000000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	436000000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	30000000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	36000000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	17000000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	8000000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-62000000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-25000000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	41000000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	80000000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	42000000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	20000000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	22000000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	11000000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	916000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1498000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	631000000	USD
CY2016	us-gaap	Increase Decrease In Book Overdrafts IncreaseDecreaseInBookOverdrafts	-89000000	USD
CY2017	us-gaap	Increase Decrease In Book Overdrafts IncreaseDecreaseInBookOverdrafts	-71000000	USD
CY2018	us-gaap	Increase Decrease In Book Overdrafts IncreaseDecreaseInBookOverdrafts	30000000	USD
CY2016	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-84000000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	98000000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-95000000	USD
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	71000000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-132000000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-194000000	USD
CY2016	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	-413000000	USD
CY2017	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	105000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-107000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	15252000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	27178000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	25413000000	USD
CY2016	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2018	us-gaap	Increase Decrease In Health Care Insurance Liabilities IncreaseDecreaseInHealthCareInsuranceLiabilities	252000000	USD
CY2016	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	1093000000	USD
CY2017	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	1823000000	USD
CY2018	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	-640000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-426000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	582000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	484000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-162000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-155000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	937000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	641000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-676000000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	158000000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-406000000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	200000000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	226000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	245000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	189000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	242000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	218000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	185000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	216000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	195000000	USD
CY2016	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	389000000	USD
CY2017	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	405000000	USD
CY2018	us-gaap	Investment Income Interest And Dividend InvestmentIncomeInterestAndDividend	514000000	USD
CY2017Q4	us-gaap	Land Land	20000000	USD
CY2018Q4	us-gaap	Land Land	20000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	179000000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	204000000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	167000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	17336000000	USD
CY2017	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2018	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	38000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	9406000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	10077000000	USD
CY2015Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	4976000000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	4563000000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	4668000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-785000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1362000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2941000000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	4862000000	USD
CY2017Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	2923000000	USD
CY2018Q4	us-gaap	Liability For Future Policy Benefits LiabilityForFuturePolicyBenefits	219000000	USD
CY2016	us-gaap	Liability For Future Policy Benefits Period Expense LiabilityForFuturePolicyBenefitsPeriodExpense	439000000	USD
CY2017	us-gaap	Liability For Future Policy Benefits Period Expense LiabilityForFuturePolicyBenefitsPeriodExpense	-22000000	USD
CY2018	us-gaap	Liability For Future Policy Benefits Period Expense LiabilityForFuturePolicyBenefitsPeriodExpense	0	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	40852000000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	39496000000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	41736000000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	4112000000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	3911000000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	3977000000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	44736000000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	43518000000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	45882000000	USD
CY2015Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	4715000000	USD
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	4487000000	USD
CY2017Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	4598000000	USD
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2018Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	2000000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	3000000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1697000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1000000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	400000000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4770000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4375000000	USD
CY2017Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	824000000	USD
CY2018Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	890000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	732000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-945000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3087000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1936000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4051000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2173000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	614000000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	1115000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	650000000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	499000000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	184000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	2448000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	491000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	193000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	644000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	355000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	1683000000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	Segment
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	1741000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	4262000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	3100000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	519000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	147000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	34000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	79000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	96000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	113000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	50000000	USD
CY2016	us-gaap	Operating Leases Income Statement Sublease Revenue OperatingLeasesIncomeStatementSubleaseRevenue	26000000	USD
CY2017	us-gaap	Operating Leases Income Statement Sublease Revenue OperatingLeasesIncomeStatementSubleaseRevenue	33000000	USD
CY2018	us-gaap	Operating Leases Income Statement Sublease Revenue OperatingLeasesIncomeStatementSubleaseRevenue	32000000	USD
CY2018Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	104000000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	2949000000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	3564000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2166000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1375000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-124000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	85000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-174000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	96000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	14000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	53000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	61000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	9000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	36000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	35000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	5000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	17000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-101000000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	149000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-189000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-63000000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	94000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-138000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-38000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	237000000	USD
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CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	43000000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	9000	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	143000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	48000000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	863000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	677000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	181.44
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	213.17
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	157.44
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	150.59
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	276.01
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	19000000	USD
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CY2018Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	1000000000	USD
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CY2017	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	44001000000	USD
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CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-503000000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	60893762	shares
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CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1090000000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	240000000	USD
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CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	201000000	USD
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CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	144493000	shares
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CY2018	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">REPORTING ENTITY</font></div><div style="line-height:120%;padding-bottom:12px;text-indent:16px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Nature of Operations</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Humana Inc., headquartered in Louisville, Kentucky, </font><font style="font-family:inherit;font-size:10pt;">is a leading health and well-being company committed to helping our millions of medical and specialty members achieve their best health. Our successful history in care delivery and health plan administration is helping us create a new kind of integrated care with the power to improve health and well‐being and lower costs. Our efforts are leading to a better quality of life for people with Medicare, families, individuals, military service personnel, and communities at large. To accomplish that, we support physicians and other health care professionals as they work to deliver the right care in the right place for their patients, our members. Our range of clinical capabilities, resources and tools, such as in‐home care, behavioral health, pharmacy services, data analytics and wellness solutions, combine to produce a simplified experience that makes health care easier to navigate and more effective.</font><font style="font-family:inherit;font-size:10pt;"> References throughout these notes to consolidated financial statements to “we,” “us,” “our,” “Company,” and “Humana,” mean Humana Inc. and its subsidiaries. We derived approximately </font><font style="font-family:inherit;font-size:10pt;">81%</font><font style="font-family:inherit;font-size:10pt;"> of our total premiums and services revenue from contracts with the federal government in </font><font style="font-family:inherit;font-size:10pt;">2018</font><font style="font-family:inherit;font-size:10pt;">, including </font><font style="font-family:inherit;font-size:10pt;">15%</font><font style="font-family:inherit;font-size:10pt;"> related to our federal government contracts with the Centers for Medicare and Medicaid Services, or CMS, to provide health insurance coverage for individual Medicare Advantage members in Florida. CMS is the federal government’s agency responsible for administering the Medicare program.</font></div></div>

Files In Submission

Name	View Source	Status
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$HUM
HUMANA INC Stock $hum

2018 Q4 Form 10-K Financial Statement

#000004907119000023 Filed on February 21, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HUM HUMANA INC Stock $hum

2018 Q4 Form 10-K Financial Statement

#000004907119000023 Filed on February 21, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HUM
HUMANA INC Stock $hum