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Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Face amount Debt Instrument, Face Amount Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Insurance Claims Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Accounts payable, accrued and other long-term liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accounts Payable, Accrued And Other Noncurrent Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accounts Payable, Accrued And Other Noncurrent Liabilities Other, net Payments for (Proceeds from) Other Investing Activities Common Stock Repurchase Program, September 2023 Common Stock Repurchase Program, September 2023 [Member] Common Stock Repurchase Program, September 2023 Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] U.S. Treasury notes US Treasury Notes Securities [Member] Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Business Acquisition, Contingent Consideration [Line Items] Business Acquisition, Contingent Consideration [Line Items] Preferred stock, $0.001 par value; 20 million shares authorized, no shares issued and outstanding Preferred Stock, Value, Issued Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Fair Value Measurement [Domain] Fair Value Measurement [Domain] Net income per share - Basic (in dollars per share) Earnings Per Share, Basic Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Property, equipment, and capitalized software, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] Number of potential for renewals Health Plan, Number Of Extension Options Health Plan, Number Of Extension Options Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Schedule of Available-for-Sale Investments Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Total assets Assets Concentrations of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Risk adjustment payable Affordable Care Act, Premium Stabilization Program, Risk Adjustment, (Payable) Affordable Care Act, Premium Stabilization Program, Risk Adjustment, (Payable) Medical care costs Cost of Goods and Services Sold Amount outstanding under letter of credit Long-Term Line of Credit Schedule of Intangible Assets Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Schedule of Fair Value of Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Purchases of property, equipment and capitalized software Payments to Acquire Property, Plant, and Equipment Other long-term liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Other Other Program [Member] Other Program Termination Date Trading Arrangement Termination Date Bright Health Medicare Brand New Day and Central Health Plan of California [Member] Brand New Day and Central Health Plan of California Mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] 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] Total revenue Total revenue Revenues Assets acquired: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Entity Address, City or Town Entity Address, City or Town 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 Schedule of The Provisional Fair Values Assigned To Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Net income Net income Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Other Other Operating Income (Expense), Net Trading Arrangement: Trading Arrangement [Axis] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Marketplace Marketplace [Member] Marketplace Third-party escrow Escrow Deposit Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Entity File Number Entity File Number Document Fiscal Year Focus Document Fiscal Year Focus Total Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Entity Address, Address Line Two Entity Address, Address Line Two Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Weighted-average number of shares issued: Weighted Average Number of Shares Outstanding, Basic [Abstract] Total assets Assets, Fair Value Disclosure Name Forgone Recovery, Individual Name Document Period End Date Document Period End Date Municipal securities Municipal Securities [Member] Municipal securities. Deferred income taxes Increase (Decrease) in Deferred Income Taxes Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Insider Trading Arrangements [Line Items] Other operating Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Pharmacy rebate receivables Pharmacy Rebate Receivables [Member] Pharmacy Rebate Receivables [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Adjustment to Compensation: Adjustment to Compensation [Axis] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Current year Current Year Claims and Claims Adjustment Expense Acquired receivable, fair value Business Combination, Acquired Receivable, Fair Value MISSISSIPPI MISSISSIPPI 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 Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Restricted cash and cash equivalents Restricted Cash and Cash Equivalents Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Denominator for basic net income per share (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Business Combination, Separately Recognized Transactions [Line Items] Business Combination, Separately Recognized Transactions [Line Items] Less: effect of income taxes OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Add: other operating revenues Other Operating Income Premium revenue Premiums Earned, Net In a Continuous Loss Position for 12 Months or More, Gross Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common Stock Repurchase Program, October 2024 Common Stock Repurchase Program, October 2024 [Member] Common Stock Repurchase Program, October 2024 Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Acquired balances, net of post-acquisition adjustments Liability for Unpaid Claims and Claims Adjustment Expense, Business Acquisitions, Net Of Post-Closing Adjustments Liability for Unpaid Claims and Claims Adjustment Expense, Business Acquisitions, Net Of Post-Closing Adjustments Common stock withheld to settle employee tax obligations Common Stock Withheld to Settle Employee Tax Obligations Common Stock Withheld to Settle Employee Tax Obligations In a Continuous Loss Position for Less than 12 Months, Gross Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Entity Filer Category Entity Filer Category NEW MEXICO NEW MEXICO Company Selected Measure Name Company Selected Measure Name