$600 million, 3.150% due December 1, 2022 3.15 Percent Senior Notes Due December 2022 [Member] 3.15 Percent Senior Notes Due December 2022 [Member] Due within one year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Business Acquisition [Axis] Business Acquisition [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Entity Address, Postal Zip Code Entity Address, Postal Zip Code Significant unobservable inputs Derivative Asset (Liability) Net, Measurement Input Other current assets Disposal Group, Including Discontinued Operation, Other Assets, Current Schedule of Activity in Benefits Payable Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Schedule of Other Intangible Assets, Indefinite-Lived Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Term loan, due October 29, 2023 Term Loan Due October 2023 [Member] Term Loan Due October 2023 Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Debt outstanding Debt Instrument, Fair Value Disclosure Services revenue, type Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Medicare stand-alone PDP Medicare Stand Alone Prescription Drug Plan [Member] Medicare Stand Alone Prescription Drug Plan [Member] Benefits payable Balances, beginning of period Balances, end of period Liability for Claims and Claims Adjustment Expense Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Revenue Disposal Group, Including Discontinued Operation, Revenue Fair Value Measurement [Domain] Fair Value Measurement [Domain] Financial Instruments [Domain] Financial Instruments [Domain] Basis spread on variable rate (percent) Debt Instrument, Basis Spread on Variable Rate Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Depreciation Depreciation Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Stated interest rate (percent) Debt Instrument, Interest Rate, Stated Percentage $750 million, 1.350% due February 3, 2027 1.35 Percent Senior Notes Due February 2027 [Member] 1.35 Percent Senior Notes Due February 2027 Member co-share amounts and government subsidies Government And Health Plan Member Subsidies Amount Amount of member co-share amounts and government subsidies that are excluded from benefits expense because the health plans do not bear responsibility. Capital in excess of par value Additional Paid in Capital, Common Stock Specialty Specialty [Member] Specialty [Member] Option Indexed to Issuer's Equity [Axis] Option Indexed to Issuer's Equity [Axis] Less: noncontrolling interests Income (Loss) From Continuing Operations Before Income Taxes, Attributable To Noncontrolling Interest Income (Loss) From Continuing Operations Before Income Taxes, Attributable To Noncontrolling Interest Common stock repurchases Increase in treasury stock from stock repurchases Treasury Stock, Value, Acquired, Cost Method Net income attributable to Humana Net income attributable to Humana Net Income (Loss) Attributable to Parent Measurement Input Type [Domain] Measurement Input Type [Domain] Cash and cash equivalents classified as held-for-sale Cash and cash equivalents Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Number of antidilutive stock options and restricted stock excluded from computation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Subsequent Event Type [Axis] Subsequent Event Type [Axis] Total reclassification adjustment, net of tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax $1.5 billion, 0.650% due August 3, 2023 0.65 Percent Senior Notes Due August 2023 [Member] 0.65 Percent Senior Notes Due August 2023 Investment income Investment income Net Investment Income Equity Component [Domain] Equity Component [Domain] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Weighted average cost of capital Measurement Input, Discount Rate [Member] Redemption price (percent) Debt Instrument, Redemption Price, Percentage Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Total invested assets Assets, Fair Value Disclosure Restructuring Plan [Axis] Restructuring Plan [Axis] $500 million, 4.875% due April 1, 2030 4.875 Percent Senior Notes Due April 2030 [Member] A 4.875 Percent Senior Notes Due April 2030 [Member] Receipts from contract deposits, net Payments For Proceeds From Contract Deposits Payments For Proceeds From Contract Deposits Minority ownership prior to acquisition (percent) Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage $500 million, 3.950% due August 15, 2049 3.95 Percent Senior Notes Due August 2049 [Member] 3.95 Percent Senior Notes Due August 2049 [Member] Fair Value Fair Value Debt securities: Debt Securities, Available-for-Sale Accelerated Share Repurchases, Date [Domain] Accelerated Share Repurchases, Date [Domain] Comprehensive income attributable to equity method investments Comprehensive Income (Loss), Net Of Tax, Attributable To Equity Method Investments Comprehensive Income (Loss), Net Of Tax, Attributable To Equity Method Investments $500 million, 3.125% due August 15, 2029 3.125 Percent Senior Notes Due August 2029 [Member] A 3.125 Percent Senior Notes Due August 2029 [Member] Supplemental cash flow disclosures: Supplemental Cash Flow Information [Abstract] Less: Fair value of liabilities assumed Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Total IBNR included in benefits payable Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount Goodwill [Line Items] Goodwill [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Retail Retail Segment [Member] Retail Segment Entity Address, State or Province Entity Address, State or Province Quoted Prices in Active Markets (Level 1) Fair Value, Inputs, Level 1 [Member] Weighted average annual interest rate (percent) Short-Term Debt, Weighted Average Interest Rate, at Point in Time $600 million, 3.850% due October 1, 2024 3.85 Percent Senior Notes Due October 2024 [Member] 3.85 Percent Senior Notes Due October 2024 [Member] Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] $400 million, 4.625% due December 1, 2042 4.625 Percent Senior Notes Due December 2042 [Member] 4.625 Percent Senior Notes Due December 2042 [Member] Gross losses on investment securities Debt Securities, Realized Loss, Gross Debt Securities, Realized Loss, Gross Transaction amount, net of existing equity stake Business Combination, Consideration Per Agreement, Net Of Existing Equity Interest Business Combination, Consideration Per Agreement, Net Of Existing Equity Interest Military services Military Service [Member] Military Service [Member] Award Type [Axis] Award Type [Axis] Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Mortgage-backed securities Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] Receivables and Other [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Group and Specialty Group And Specialty Segment [Member] Group And Specialty Segment Dividends Dividends, Common Stock [Abstract] Long-term debt Total long-term debt Long-Term Debt, Excluding Current Maturities Fair value of assets acquired, net of cash and cash equivalents acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Total liabilities Liabilities Geographical [Axis] Geographical [Axis] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Total intersegment revenues Revenues, Intersegment Revenues, Intersegment Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Notes Payable To Banks And Commercial Paper Notes Payable To Banks And Commercial Paper [Member] Notes Payable To Banks And Commercial Paper [Member] Restructuring and impairment charge Restructuring Costs and Asset Impairment Charges Revolving credit facility Revolving Credit Facility [Member] Pretax earnings Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, before Income Tax New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Document Type Document Type Losses (gains) on investment securities, net Debt Securities, Available-for-Sale, Realized Gain (Loss) Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Long-term assets held-for-sale Long-term assets held-for-sale Disposal Group, Including Discontinued Operation, Assets, Noncurrent Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Severance costs Severance Costs DEBT Debt Disclosure [Text Block] Segments [Axis] Segments [Axis] Total gains or losses: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Held-for-sale Accounts Receivable, Held-for-sale Product and Service [Domain] Product and Service [Domain] Entity Shell Company Entity Shell Company Provision for deferred income taxes Deferred Income Tax Expense (Benefit) $400 million, 2.900% due December 15, 2022 2.90 Percent Senior Notes Due December 2022 [Member] 2.90 Percent Senior Notes Due December 2022 [Member] Concentration Risk [Table] Concentration Risk [Table] Equity interest to be sold Disposal Group, Including Discontinued Operation, Equity Interest Sold Disposal Group, Including Discontinued Operation, Equity Interest Sold Financial Instrument [Axis] Financial Instrument [Axis] Realized in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Securities, number of positions Debt, Securities, Available-For-Sale, Securities, Number Of Positions Debt Securities, Available-for-sale, Securities, Number Of Positions Depreciation and amortization classified as benefit expense Depreciation And Amortization Classified As Benefit Expense Depreciation and amortization expense that has been reclassified to be included with benefit expenses. The reclassification is the result of depreciation and amortization expense associated primarily from the delivery of pharmacy services by our wholly-owned pharmacy business included in our Healthcare Services segment. Consolidation Items [Domain] Consolidation Items [Domain] Subsequent event Subsequent Event [Member] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Revenue Benchmark Revenue Benchmark [Member] Debt to capitalization percentage, maximum Debt Instrument, Covenant, Debt To Capitalization Percentage, Maximum Debt Instrument, Covenant, Debt To Capitalization Percentage, Maximum Document Period End Date Document Period End Date Put option Put Option [Member] January 2022 ASR January 2022 Accelerated Share Repurchase Agreement [Member] January 2022 Accelerated Share Repurchase Agreement Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Total assets Assets Total paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Debt Disclosure [Abstract] Debt Disclosure [Abstract] Earnings Per Share [Abstract] Earnings Per Share [Abstract] FHLB borrowings Federal Home Loan Bank Advances [Member] Change in gross unrealized investment (losses) gains OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Common stock Equity Securities, FV-NI, Current Long-term debt, current maturities Long-Term Debt, Current Maturities Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Share repurchase authorization Stock Repurchase Program, Authorized Amount Asset-backed securities Asset-backed securities Asset-Backed Securities [Member] Common shares acquired in connection with employee stock plans, amount Share Repurchases Related To Employee Stock Based Compensation Awards Value Cost of common stock that were repurchased in the administration of our employee share-based compensation plans. Under the terms of these plans, we accept shares of common stock from option holders if they elect to surrender previously-owned shares upon exercise of the option to cover the exercise price of the options or, in the case of restricted shares of common stock, the withholding of shares to satisfy tax withholding obligations associated with the vesting of such shares. Segment earnings (loss) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Segments [Domain] Segments [Domain] Eliminations/ Corporate Corporate And Eliminations [Member] Corporate And Eliminations [Member] Schedule of Goodwill [Table] Schedule of Goodwill [Table] EARNINGS PER COMMON SHARE COMPUTATION Earnings Per Share [Text Block] Customer [Axis] Customer [Axis] Other long-term liabilities Other Noncurrent Liabilities [Member] Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Effect of income taxes OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Award Type [Domain] Award Type [Domain] Residential Residential Mortgage-Backed Securities [Member] Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Income Tax Contingency [Table] Income Tax Contingency [Table] Schedule of Other Intangible Assets, Amortizable Schedule of Finite-Lived Intangible Assets [Table Text Block] Restructuring Plan [Domain] Restructuring Plan [Domain] Restricted stock unit vesting Stock Issued During Period, Value, Restricted Stock Award, Gross Services Services revenue: Revenue from Contract with Customer, Including Assessed Tax Entity Registrant Name Entity Registrant Name Insurance [Abstract] Insurance [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Enterprise value of acquiree including existing equity value Business Combination, Total Enterprise Value Of Acquiree Business Combination, Total Enterprise Value Of Acquiree Tricare East Region Contract Tricare East Region Contract [Member] Tricare East Region Contract [Member] $600 million, 3.950% due March 15, 2027 3.95 Percent Senior Notes Due March 2027 [Member] 3.95 Percent Senior Notes Due March 2027 [Member] Entity Address, City or Town Entity Address, City or Town Actual debt to capitalization percentage Debt Instrument, Covenant, Debt To Capitalization Percentage, Actual Debt Instrument, Covenant, Debt To Capitalization Percentage, Actual Mortgage and asset-backed securities Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value $600 million, 4.500% due April 1, 2025 4.50 Percent Senior Notes Due April 2025 [Member] A 4.50 Percent Senior Notes Due April 2025 [Member] Operating expenses: Operating Expenses [Abstract] Total stockholders’ equity Balances Balances Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Minimum Minimum [Member] Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Due within one year Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Number of states comprising TRICARE beneficiaries Number Of States Comprising TRICARE Beneficiaries Number Of States Comprising TRICARE Beneficiaries Common stock, par (in dollars per share) Common Stock, Par or Stated Value Per Share Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Treasury Stock Treasury Stock, Common [Member] FAIR VALUE Fair Value Disclosures [Text Block] Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Trading Symbol Trading Symbol Entity File Number Entity File Number Common shares acquired in connection with employee stock plans (in shares) Share Repurchases Related To Employee Stock Based Compensation Awards Shares Number of shares of common stock that were repurchased in the administration of our employee share-based compensation plans. Under the terms of these plans, we accept shares of common stock from option holders if they elect to surrender previously-owned shares upon exercise of the option to cover the exercise price of the options or, in the case of restricted shares of common stock, the withholding of shares to satisfy tax withholding obligations associated with the vesting of such shares. Termination of put and call options Loss On Termination Of Derivatives Loss On Termination Of Derivatives 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Four Disposal Group Classification [Axis] Disposal Group Classification [Axis] External Credit Rating, Standard & Poor's [Domain] External Credit Rating, Standard & Poor's [Domain] Effective income tax rate (percent) Effective Income Tax Rate Reconciliation, Percent Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure LIBOR London Interbank Offered Rate (LIBOR) [Member] S&P AA- rating Standard & Poor's, AA- Rating [Member] Concentration risk, less than (percent) Concentration risk (percent) Concentration Risk, Percentage Total revenues Revenues Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table] INVESTMENT SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] INCOME TAXES Income Tax Disclosure [Text Block] Credit Facility [Domain] Credit Facility [Domain] 12 months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Long-term liabilities held-for-sale Long-term liabilities held-for-sale Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Total other intangible assets, cost Intangible Assets, Gross (Excluding Goodwill) Amortization Amortization of Intangible Assets Schedule of Changes in Carrying Amount of Goodwill By Reportable Segments Schedule of Goodwill [Table Text Block] Interest payments Interest Paid, Excluding Capitalized Interest, Operating Activities Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent $750 million, 3.700% due March 23, 2029 3.700 Percent Senior Notes Due March 2029 [Member] 3.700 Percent Senior Notes Due March 2029 Long term and short term debt, combined amount Debt, Long-Term and Short-Term, Combined Amount Total liabilities held-for-sale Disposal Group, Including Discontinued Operation, Liabilities (Repayments) proceeds from issuance of commercial paper, net Proceeds from (Repayments of) Commercial Paper BENEFITS PAYABLE Insurance Disclosure [Text Block] Delayed draw term loan, due May 28, 2024 Delayed Draw Term Loan May 2024 [Member] Delayed Draw Term Loan May 2024 Concentration Risk Type [Domain] Concentration Risk Type [Domain] Counterparty Name [Domain] Counterparty Name [Domain] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Investments Investments [Member] Total external revenues Revenues, Premiums And Service, External Revenues, Premiums And Service, External Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Book overdraft Book Overdraft Liability Book Overdraft Liability Delayed draw term loan Delayed Draw Term Loan May 2021 [Member] Delayed Draw Term Loan May 2021 Entity Interactive Data Current Entity Interactive Data Current Commercial Commercial Mortgage-Backed Securities [Member] Amortizable intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Changes in operating assets and liabilities, net of effect of businesses acquired: Increase (Decrease) in Operating Capital [Abstract] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Three Proceeds from sales of investment securities Proceeds from Sale of Debt Securities, Available-for-Sale Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Dividends paid Payments of Dividends Retained Earnings Retained Earnings [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Dividends and dividend equivalents Dividends, Common Stock, Cash KAH Kindred at Home Kindred At Home [Member] Kindred At Home Estimated amortization remaining for the years ending December 31, Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] Common Stock Common Stock [Member] Other comprehensive (loss) income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Number of reportable segments Number of Reportable Segments Net long-term asset (liability) Net Noncurrent Asset (Liability) Net Noncurrent Asset (Liability) Common stock repurchases Payments for Repurchase of Common Stock Revenue Recognition Revenue [Policy Text Block] Statement [Table] Statement [Table] Summary of Assets and Liabilities in Disposal Group Disposal Groups, Including Discontinued Operations [Table Text Block] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Receivables, net of allowances of $72 in 2022 and $83 in 2021 Receivables, Net, Current Document Quarterly Report Document Quarterly Report Letter of credit Letter of Credit [Member] Current assets: Assets, Current [Abstract] Tax-exempt municipal securities Nontaxable Municipal Notes [Member] Disposal Group, Held-for-sale, Not Discontinued Operations Disposal Group, Held-for-sale, Not Discontinued Operations [Member] Accelerated stock repurchase payment Accelerated Share Repurchases, Settlement (Payment) or Receipt Remaining share repurchase authorization at replacement Stock Repurchase Program, Remaining Authorized Repurchase Amount Expired Upon Replacement Stock Repurchase Program, Remaining Authorized Repurchase Amount Expired Upon Replacement Schedule of Assumptions Used For Inputs In Fair Value Measurement Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Statistical Measurement [Axis] Statistical Measurement [Axis] Shares received (in shares) Treasury Stock, Shares, Acquired Less: Net losses recognized on equity securities sold during the period Equity Securities, FV-NI, Realized Gain (Loss) Gross gains on equity securities Equity Securities, FV-NI, Realized Gain Indefinite-lived intangible assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Retained earnings Retained Earnings (Accumulated Deficit) Disposal Group Name [Axis] Disposal Group Name [Axis] Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Other Other Operating Activities, Cash Flow Statement Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current U.S. Treasury and agency obligations US Treasury and Government [Member] Equity Components [Axis] Equity Components [Axis] Recurring Basis Fair Value, Recurring [Member] Trade accounts payable and accrued expenses Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Effect of income taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Document Fiscal Year Focus Document Fiscal Year Focus Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Statement [Line Items] Statement [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Consideration to be received Disposal Group, Including Discontinued Operation, Consideration Variable Rate [Domain] Variable Rate [Domain] Amortizable intangible assets, cost Finite-Lived Intangible Assets, Gross Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Operating costs Selling, General and Administrative Expense RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS Accounting Standards Update and Change in Accounting Principle [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Products Product [Member] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Accumulated Other Comprehensive Income (loss) AOCI Attributable to Parent [Member] Fair Value Risk Fair Value Risk [Member] Fair Value Risk CMS Subsidies/ Discounts Cms Subsidies Or Discounts [Member] CMS Subsidies Or Discounts [Member] Reclassification adjustment for net realized gains Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Document Transition Report Document Transition Report Local Phone Number Local Phone Number Income (loss) from operations Operating Income (Loss) Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Balances (in shares) Balances (in shares) Common Stock, Shares, Outstanding Annualized volatility Measurement Input, Option Volatility [Member] Services Service [Member] Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill $750 million, 2.150% due February 3, 2032 2.15 Percent Senior Notes Due February 2032 [Member] 2.15 Percent Senior Notes Due February 2032 Treasury stock, shares (in shares) Treasury Stock, Shares Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash 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364-day unsecured revolving credit agreement Revolving Credit Agreement June 2021 One Year [Member] Revolving Credit Agreement June 2021 One Year Loss Contingencies [Line Items] Loss Contingencies [Line Items] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Schedule of Investment Securities Classified as Current and Long-Term Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Reclassification from capital in excess of par value to treasury stock Common Stock Reclassified From Capital In Excess Of Par Value To Treasury Stock Upon Repurchase, Value Common Stock Reclassified From Capital In Excess Of Par Value To Treasury Stock Upon Repurchase, Value Amount per Share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Trade accounts payable and accrued expenses Trade accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current Total investment securities Investments Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 198,666,598 shares issued at June 30, 2022 and 198,648,742 shares at December 31, 2021 Common Stock, Value, Issued Carrying Value Reported Value Measurement [Member] Long term growth rate Measurement Input, Long-Term Revenue Growth Rate [Member] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Provider services Provider Services [Member] Provider Services Senior notes Senior Notes [Member] Preliminary fair values of assets acquired and liabilities assumed at the date of the acquisition Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract] Short-term Debt [Line Items] Short-Term Debt [Line Items] Restricted stock unit vesting (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Operating segments Operating Segments [Member] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Product Concentration Risk Product Concentration Risk [Member] ASO and other A S O And Other [Member] ASO and Other [Member] Term loan Loans Payable [Member] Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Percentage of debt securities considered to be of investment-grade (percent) Percentage Of Total Debt Securities, Investment Grade Quality Percentage Of Total Debt Securities, Investment Grade Quality Current liabilities: Liabilities, Current [Abstract] Common stock, shares issued (in shares) Common Stock, Shares, Issued Current liabilities held-for-sale Current liabilities held-for-sale Disposal Group, Including Discontinued Operation, Liabilities, Current Concentration Risk [Line Items] Concentration Risk [Line Items] Change in book overdraft Increase (Decrease) in Book Overdrafts Equity method investments Equity Method Investments Unearned revenues Contract with Customer, Liability, Current Schedule of Gross Unrealized Losses and Fair Value of Securities Unrealized Gain (Loss) on Investments [Table Text Block] Fair value of financial asset Financial Assets, Fair Value Disclosure Financial Assets, Fair Value Disclosure Percentage of premiums and services revenue Percentage Of Total Premium And Services Revenues Percentage Of Total Premium And Services Revenues Accelerated Share Repurchases, Date [Axis] Accelerated Share Repurchases, Date [Axis] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Securities in unrealized loss positions, number of positions Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Total Debt Securities, Available-for-Sale, Unrealized Loss Position Amendment Flag Amendment Flag Mizuho Mizuho Markets Americas LLC [Member] Mizuho Markets Americas LLC Weighted average life (in years) Finite-Lived Intangible Asset, Useful Life Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Aggregate principal Debt Instrument, Face Amount Options Option on Securities [Member] Maximum individual state general bond obligation as a percentage of total debt securities (percent) Maximum Individual State General Bond Obligation, As Percentage Of Total Debt Securities Maximum Individual State General Bond Obligation, As Percentage Of Total Debt Securities Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Existing equity value Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Comprehensive income attributable to Humana Comprehensive Income (Loss), Net of Tax, Attributable to Parent Acquisitions Goodwill, Acquired During Period ACQUISITIONS AND DIVESTITURES Mergers, Acquisitions and Dispositions Disclosures [Text Block] Schedule of Segment Results Schedule of Segment Reporting Information, by Segment [Table Text Block] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Assets held for abandonment Impairment of Long-Lived Assets to be Disposed of Entity Current Reporting Status Entity Current Reporting Status Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Other long-term assets Other Assets, Noncurrent Healthcare Services Healthcare Services Segment [Member] Healthcare Services Segment Pharmacy solutions Pharmacy Solutions [Member] Pharmacy Solutions Schedule of Realized Gains (Losses) Related to Investment Securities Included Within Investment Income Schedule of Realized Gain (Loss) [Table Text Block] Impairment on property and equipment Tangible Asset Impairment Charges Paid related to: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Kindred at Home, Hospice and Personal Care Divisions Kindred At Home, Hospice And Personal Care Divisions [Member] Kindred At Home, Hospice And Personal Care Divisions Repayment of term loan Repayments of Notes Payable Available-for-sale Securities, Debt Maturities [Abstract] Available-for-Sale Securities, Debt Maturities [Abstract] Proceeds from issuance of senior notes, net Proceeds from Issuance of Senior Long-Term Debt Acquisitions Liability for Unpaid Claims and Claims Adjustment Expense, Business Acquisitions Home solutions Home Solutions [Member] Home Solutions Counterparty Name [Axis] Counterparty Name [Axis] Benefits payable Increase (Decrease) in Health Care Insurance Liabilities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Property and equipment, net Property, Plant and Equipment, Net Schedule of Estimated Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Details of Dividend Payments Dividends Declared [Table Text Block] Employee stock options Share-Based Payment Arrangement, Option [Member] Treasury stock, at cost, 72,112,900 shares at June 30, 2022 and 69,846,758 shares at December 31, 2021 Treasury Stock, Value October 2021 Term Loan Agreement October 2021 Term Loan Agreement [Member] October 2021 Term Loan Agreement Total amount Dividends Receivables, allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Stock option exercises Stock Issued During Period, Value, Stock Options Exercised Other (income) expense, net Other Nonoperating Income (Expense) Balance Sheet Location [Axis] Balance Sheet Location [Axis] Average daily volume weighted-average share price of common stock during term of agreement (in dollars per share) Accelerated Share Repurchases, Final Price Paid Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule of Balance Sheet Amounts Associated With Medicare Part D Balance Sheet Account Associated With Medicare Part D Table [Table Text Block] Balance Sheet Account Associated With Medicare Part D Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Maximum Maximum [Member] Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Gentiva Term Loan Due 2025 Gentiva Term Loan Due 2025 [Member] Gentiva Term Loan Due 2025 MEDICARE PART D Medicare Part D Disclosure [Text Block] Balance sheet amounts associated with Medicare Part D. Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Net (losses) gains recognized on equity securities during the period Equity Securities, FV-NI, Gain (Loss) Unearned revenues Increase (Decrease) in Contract with Customer, Liability Total current assets Assets, Current Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Other intangible assets: Intangible Assets, Net (Excluding Goodwill) [Abstract] Income tax payments, net Income Taxes Paid, Net Business Acquisition [Line Items] Business Acquisition [Line Items] Entity Small Business Entity Small Business Measurement Basis [Axis] Measurement Basis [Axis] STOCKHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Revenues: Revenues [Abstract] Amortizable intangible assets, net Finite-Lived Intangible Assets, Net Line of Credit Facility [Table] Line of Credit Facility [Table] Distribution to noncontrolling interest holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Schedule of Financial Assets Measured at Fair Value on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Deferred tax liabilities Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities Purchases of investment securities Payments to Acquire Debt Securities, Available-for-Sale Premiums Premiums Earned, Net Fully-insured Fully Insured [Member] Fully Insured [Member] Mortgage and asset-backed securities Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Gross gains on investment securities Debt Securities, Realized Gain, Gross Debt Securities, Realized Gain, Gross Maximum amount outstanding during period Short-Term Debt, Maximum Amount Outstanding During Period Short-term debt Short-term debt outstanding Short-Term Debt Title of 12(b) Security Title of 12(b) Security Other liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent BASIS OF PRESENTATION AND SIGNIFICANT EVENTS Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Senior notes debt outstanding Notes Payable, Fair Value Disclosure Segment earnings (loss) attributable to Humana Income (Loss) From Continuing Operations Before Income Taxes, Attributable To Parent Income (Loss) From Continuing Operations Before Income Taxes, Attributable To Parent Enterprise valuation Disposal Group, Including Discontinued Operation, Enterprise Valuation Disposal Group, Including Discontinued Operation, Enterprise Valuation Investment securities Short-Term Investments Class of Treasury Stock [Table] Class of Treasury Stock [Table] Maximum borrowing capacity including uncommitted incremental loan facility Line Of Credit Facility, Maximum Borrowing Capacity Including Uncommitted Incremental Capacity Maximum borrowing capacity under the credit facility including uncommitted incremental capacity and without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Subsequent Event [Line Items] Subsequent Event [Line Items] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Debt Instrument [Line Items] Debt Instrument [Line Items] Business Combination and Asset Acquisition [Abstract] Number of TRICARE beneficiaries Number Of TRICARE Beneficiaries Number Of TRICARE Beneficiaries Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $400 million, 4.800% due March 15, 2047 4.80 Percent Senior Notes Due March 2047 [Member] 4.80 Percent Senior Notes Due March 2047 [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Debt issue costs Payments of Debt Issuance Costs SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] COMMITMENTS, GUARANTEES AND CONTINGENCIES Commitments Contingencies and Guarantees [Text Block] Noncompetes and other Noncompetes And Other [Member] Noncompetes and Other [Member] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Two 12 months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Current year Current Year Claims and Claims Adjustment Expense Provider contracts Contractual Rights [Member] Other assets Increase (Decrease) in Other Operating Assets Credit Rating, Standard & Poor's [Axis] Credit Rating, Standard & Poor's [Axis] Credit spread Credit Spread Option [Member] Equity interest to be acquired per agreement (percent) Definitive Agreement, Equity Interest To Be Acquired, Percentage Definitive Agreement, Equity Interest To Be Acquired, Percentage Schedule of Contractual Maturity of Debt Securities Available for Sale Investments Classified by Contractual Maturity Date [Table Text Block] Entity Filer Category Entity Filer Category Weighted average outstanding shares of common stock used to compute basic earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Basic Risk Corridor Settlement Risk Corridor Settlements Medicare Part D [Member] Risk Corridor Settlements - Medicare Part D [Member] Medicare Total Medicare Medicare [Member] Medicare [Member] Prior years Prior Year Claims and Claims Adjustment Expense Decrease in capital in excess of par value Treasury Stock, Decrease In Capital In Excess Of Par Value Treasury Stock, Decrease In Capital In Excess Of Par Value Security Exchange Name Security Exchange Name Net recognized (losses) gains on investment securities Debt and Equity Securities, Gain (Loss) $250 million, 8.150% due June 15, 2038 8.15 Percent Senior Notes Due June 2038 [Member] 8.15 Percent Senior Notes Due June 2038 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Preferred stock, $1 par; 10,000,000 shares authorized; none issued Preferred Stock, Value, Issued Current assets held-for-sale Current assets held-for-sale Disposal Group, Including Discontinued Operation, Assets, Current Uncommitted incremental loan facility Line Of Credit Facility, Uncommitted Incremental Capacity Line Of Credit Facility, Uncommitted Incremental Capacity Restricted stock Restricted Stock [Member] Investment Securities, Available-for-sale Amortized Cost to Fair Value Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Schedule of Carrying Value of Debt Outstanding Schedule of Debt [Table Text Block] Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Unrealized in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Short-term debt Total short-term debt Debt, Current Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Cover [Abstract] Cover [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Unobservable Inputs (Level 3) Level 3 fair value measurement Fair Value, Inputs, Level 3 [Member] Income (loss) before income taxes and equity in net earnings Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Long-term investment securities Debt Securities, Available-for-Sale, Noncurrent Segment Reporting [Abstract] Segment Reporting [Abstract] Call option Call Option [Member] Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Incurred related to: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Value Creation Initiatives Value Creation Initiatives [Member] Value Creation Initiatives Noncontrolling Interests Noncontrolling Interest [Member] Total liabilities and stockholders’ equity Liabilities and Equity Debt instrument term (in years) Debt Instrument, Term Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Goodwill Goodwill [Roll Forward] Contract term years Contract Term Years Contract term, years. Remaining authorized amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Dilutive effect of employee stock options and restricted stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Receivables Increase (Decrease) in Receivables Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Customer contracts/ relationships Customer Contracts [Member] Disposal Group Name [Domain] Disposal Group Name [Domain] Acquisitions, net of cash and cash equivalents acquired Cash paid for acquired businesses, net of cash and cash equivalents acquired Payments to Acquire Businesses, Net of Cash Acquired Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Benefits Policyholder Benefits and Claims Incurred, Net, Health Current Fiscal Year End Date Current Fiscal Year End Date Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract] Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent Group Medicare Advantage Group Medicare Advantage [Member] Group Medicare Advantage Total other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Total assets held-for-sale Disposal Group, Including Discontinued Operation, Assets Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Wells Fargo Wells Fargo Bank [Member] Wells Fargo Bank Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Consolidation Items [Axis] Consolidation Items [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Total current liabilities Liabilities, Current 5-year unsecured revolving credit agreement Revolving Credit Agreement June 2021 Five Year [Member] Revolving Credit Agreement June 2021 Five Year Other current assets Other Assets, Current Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Depreciation and amortization Depreciation And Amortization Income Statement Depreciation and amortization expense excluding depreciation and amortization primarily from the delivery of pharmacy services by our wholly-owned pharmacy business (included in our Healthcare Services segment) which has been reclassified to benefit expenses. $750 million, 4.950% due October 1, 2044 4.95 Percent Senior Notes Due October 2044 [Member] 4.95 Percent Senior Notes Due October 2044 [Member] Corporate debt securities Corporate debt securities Corporate Debt Securities [Member] Facility fee (percent) Line of Credit Facility, Commitment Fee Percentage Unrealized (losses) gains recognized on equity securities still held at the end of the period Equity Securities, FV-NI, Unrealized Gain (Loss) Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Amortization Amortization Receivables, net of allowances Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Entity Address, Address Line One Entity Address, Address Line One Total operating expenses Benefits, Losses and Expenses Other Proceeds from (Payments for) Other Financing Activities Product and Service [Axis] Product and Service [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Total incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Interest expense Interest Expense Trade names and technology Trade Names [Member] Credit Facility [Axis] Credit Facility [Axis] Total change in unrealized investment (losses) gains, net of tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Certificates of need Certificate Of Need [Member] Certificate Of Need Equity [Abstract] Equity [Abstract] Subsequent Event [Table] Subsequent Event [Table] Total net asset (liability) Net Asset (Liability) Net Asset (Liability) Entity Tax Identification Number Entity Tax Identification Number Other long-term assets Other Noncurrent Assets [Member] Schedule of Short-term Debt [Table] Schedule of Short-Term Debt [Table] Proceeds from term loan Proceeds from Notes Payable 2022 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Commercial paper Commercial Paper [Member] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Five Entity Central Index Key Entity Central Index Key Measurement Frequency [Axis] Measurement Frequency [Axis] Net current asset (liability) Net Current (Liability) Asset Net current (liability) asset Medicaid Medicaid [Member] Medicaid [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Other assets Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Measurement Input Type [Axis] Measurement Input Type [Axis] Revenue exit multiple Revenue Exit Multiple [Member] Revenue Exit Multiple City Area Code City Area Code ASSETS Assets [Abstract] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Accelerated stock repurchase agreement amount Accelerated Share Repurchases, Agreement Amount Accelerated Share Repurchases, Agreement Amount Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Outstanding borrowings Line of Credit, Current Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Fair value Beginning balance at January 1 Balance at June 30 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Proceeds from maturities of investment securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Gain (Loss) on Equity Securities Gain (Loss) on Securities [Table Text Block] Fair value of financial liability Financial Liabilities Fair Value Disclosure Details of businesses acquired in purchase transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Variable Rate [Axis] Variable Rate [Axis] Medicaid and other Medicaid And Other [Member] Medicaid and Other [Member] Other long-term liabilities Other long-term liabilities Other Liabilities, Noncurrent Equity in net earnings (losses) Equity in net losses (earnings) Income (Loss) from Equity Method Investments Disposal Group Classification [Domain] Disposal Group Classification [Domain] Other liabilities Increase (Decrease) in Other Operating Liabilities Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Purchases of property and equipment, net Payments to Acquire Property, Plant, and Equipment 2023 Finite-Lived Intangible Asset, Expected Amortization, Year One Schedule of Details Supporting Computation of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Remaining ownership percentage acquired Business Combination, Step Acquisition, Equity Interest in Acquiree, Subsequent Acquisition, Percentage Business Combination, Step Acquisition, Equity Interest in Acquiree, Subsequent Acquisition, Percentage Customer [Domain] Customer [Domain] Health Care [Member]