Provision for income taxes Deferred Income Taxes and Tax Credits Consolidated Entities [Axis] Consolidated Entities [Axis] Variable Rate [Domain] Variable Rate [Domain] Oral pharmaceuticals Oral Pharmaceuticals [Member] Oral Pharmaceuticals Net income (loss) Net loss attributable to redeemable noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Offering Costs Deferred Charges, Policy [Policy Text Block] Proceeds from sales of marketable securities Proceeds from Sale of Debt Securities, Available-for-Sale Statistical Measurement [Domain] Statistical Measurement [Domain] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Notes receivable - related parties Financing Receivable, after Allowance for Credit Loss, Noncurrent Redemption value of noncontrolling interest Redeemable Noncontrolling Interest, Equity, Redemption Value Units vested upon consummation of business combination (in units) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Vested Upon Consummation Of Business Combination Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Vested Upon Consummation Of Business Combination All Award Types Award Type [Domain] Directors and Officers Liability Insurance Directors and Officers Liability Insurance [Member] Investment, Name [Domain] Investment, Name [Domain] Outstanding, beginning period (in shares) Outstanding, ending period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Statement of Stockholders' Equity [Abstract] Investments, Debt and Equity Securities [Abstract] 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] Revolving Credit Facility Revolving Credit Facility [Member] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] DTOC Sponsor DTOC Sponsor [Member] DTOC Sponsor Accounts payable Accounts Payable, Current Computer equipment Computer Equipment [Member] Investment, Name [Axis] Investment, Name [Axis] Operating 
Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Measurement Input, Price Volatility Measurement Input, Price Volatility [Member] Supplier [Axis] Supplier [Axis] Equity Equity [Text Block] MIBA MIBA [Member] MIBA Professional Liability Malpractice Loss Contingency, Policy [Policy Text Block] Income Taxes Income Tax Disclosure [Text Block] Business Business Description and Basis of Presentation [Text Block] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Ownership [Axis] Ownership [Axis] Physician Owned Physicians [Member] Physician Owned Property and equipment, gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Noncontrolling Interest [Abstract] Current liabilities Liabilities, Current [Abstract] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Stockholders' Equity, Conversion Right [Domain] Stockholders' Equity, Conversion Right [Domain] Stockholders' Equity, Conversion Right [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Earnings (loss) per unit, diluted (in usd per share) Diluted loss per share of Class A Common Stock (in dollars per share) Earnings Per Share, Diluted Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Patient accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Refund liability Customer Refund Liability, Current Threshold stock price, conversion price adjustment (in usd per share) Stockholders' Equity, Conversion, Stock Price Stockholders' Equity, Conversion, Stock Price Schedule of Reverse Recapitalization, Ownership Summary Schedule Of Reverse Recapitalization, Ownership Summary [Table Text Block] Schedule Of Reverse Recapitalization, Ownership Summary Treasury stock, common, shares (in shares) Treasury Stock, Common, Shares Line of Credit Line of Credit [Member] Malpractice insurance, coverage per claim Malpractice Insurance, Maximum Coverage Per Incident Other income (expense) Other Nonoperating Income (Expense) [Abstract] Bloomberg Short-Term Bank Yield Index Bloomberg Short-Term Bank Yield Index [Member] Bloomberg Short-Term Bank Yield Index Redeemable noncontrolling interest Beginning Balance Ending Balance Redeemable Noncontrolling Interest, Equity, Carrying Amount Trading Symbol Trading Symbol Reverse Recapitalization Reverse Recapitalization Disclosure [Text Block] Reverse Recapitalization Disclosure Common Units Member Units [Member] Net income (loss) Net Income (Loss) Schedule of Earnings Per Unit Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block] Total current liabilities Liabilities, Current 2026 Finance Lease, Liability, to be Paid, Year Two Leases Lessee, Operating Leases [Text Block] Corporate bonds Corporate Bond Securities [Member] AON Central AON Central [Member] AON Central Property and equipment, net Property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Stockholders' equity, conversion, threshold stock price (in dollars per share) (less than) (greater than) Stockholders' Equity, Conversion, Threshold Stock Price Stockholders' Equity, Conversion, Threshold Stock Price Liabilities, Mezzanine Equity, and Stockholders' Equity Liabilities and Equity [Abstract] Employee Stock Employee Stock [Member] Repurchases of Class A Common Stock Stock Repurchased During Period, Value Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Clinical Trials Clinical Trials [Member] Clinical Trials Marketable Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Stockholders' equity Equity, Attributable to Parent [Abstract] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Gross Unrealized
Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax AON Inc. AON Inc. [Member] AON Inc. 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Entity File Number Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Current portion of operating lease liabilities Less: current portion of lease liabilities Operating Lease, Liability, Current Interest on finance lease liabilities (included in interest expense) Finance Lease, Interest Expense Reverse Recapitalization, Change In Units [Roll Forward] Reverse Recapitalization, Change In Units [Roll Forward] Reverse Recapitalization, Change In Units Total right-of-use assets Lease, Right-Of-Use Asset Lease, Right-Of-Use Asset Accounts payable Accounts Payable Description Of Business And Significant Accounting Policies [Line Items] Description Of Business And Significant Accounting Policies [Line Items] Description Of Business And Significant Accounting Policies [Line Items] Entity Shell Company Entity Shell Company 2027 Lessee, Operating Lease, Liability, 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Share Treasury stock, at cost, 31,170 shares at March 31, 2024 and 14,729 shares at December 31, 2023 Treasury Stock, Common, Value Security Exchange Name Security Exchange Name Redemption of Class B Common Stock to Class A Common Stock Stock Redeemed or Called During Period, Value Total debt Long-Term Debt Equity-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Current portion of notes receivable - related parties Less:  Current portion of notes receivable Financing Receivable, after Allowance for Credit Loss, Current Capital Unit, Class [Domain] Capital Unit, Class [Domain] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Common Class A Common Class A Common Class A [Member] Cost not yet recognized, period for recognition (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Redeemable Noncontrolling Interest Noncontrolling Interest Disclosure [Text Block] Total costs and expenses Costs and Expenses Repurchases (in units) Common Unit, Repurchased Common Unit, Repurchased Redemption ratio Stockholders' Equity, Redemption Ratio Stockholders' Equity, Redemption Ratio Maximum Maximum [Member] Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Type Document Type Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Minimum funding threshold (in percent) Debt Instrument, Minimum Funding Threshold, Percentage Debt Instrument, Minimum Borrowing Threshold, Percentage Entity Address, Address Line One Entity Address, Address Line One Current Lease Liability, Current [Abstract] Lease Liability, Current Cost of shares repurchased (less than) Treasury Stock, Value, Acquired, Cost Method Entity Address, Address Line Two Entity Address, Address Line Two 2027 Finance Lease, Liability, to be Paid, Year Three Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Redemption of Class B Common Stock to Class A Common Stock Redeemable Noncontrolling Interest, Stock Redeemed Redeemable Noncontrolling Interest, Stock Redeemed Equity-Based Compensation Share-Based Payment Arrangement [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-Sale 2025 Finance Lease, Liability, to be Paid, Year One Income tax payable Taxes Payable, Current Warrant, exercise period, after initial public offering Class Of Warrant Or Right, Exercise Period, After Initial Public Offering Class Of Warrant Or Right, Exercise Period, After Initial Public Offering Allocation of income to controlling and noncontrolling interests (in percent) Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Allocation Of Income Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Allocation Of Income Net loss attributable to redeemable noncontrolling interest Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Temporary equity, redeemable period Temporary Equity, Redeemable Period Temporary Equity, Redeemable Period Due to AON LLC and subsidiaries, net Other Liabilities, Current Mezzanine equity Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Variable Rate [Axis] Variable Rate [Axis] Income Statement [Abstract] Inventory [Line Items] Inventory [Line Items] Impact of the Reverse Recapitalization Common Unit, Value, Impact Of The Reverse Recapitalization Common Unit, Value, Impact Of The Reverse Recapitalization Stockholders' equity, conversion period (in years) Stockholders' Equity, Conversion Period Stockholders' Equity, Conversion Period Debt Instrument, Threshold Limit, Period [Domain] Debt Instrument, Threshold Limit, Period [Domain] Debt Instrument, Threshold Limit, Period [Domain] Shares issued (in shares) Stock Issued During Period, Shares, New Issues Title of 12(b) Security Title of 12(b) Security Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Cash and cash equivalents, estimated fair value Cash and Cash Equivalents, Fair Value Disclosure Business Combinations Business Combination Disclosure [Text Block] Other comprehensive loss attributable to noncontrolling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Related Party, Type [Domain] Related Party, Type [Domain] Number of securities called by each warrant (in shares) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Mezzanine Equity and Treasury Stock Stockholders' Equity, Policy [Policy Text Block] Invested capital contributions Members' Capital Beginning Balance (usd per share) Ending Balance (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Income Tax Disclosure [Abstract] Series A Preferred Cumulative Dividends Distributed Earnings Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Inventories Inventory, Net Total lease costs Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Noncontrolling Interests Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Entity Interactive Data Current Entity Interactive Data Current Long-term Debt Long-Term Debt [Text Block] Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by 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Service Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Operating cash flows from operating leases Payments for operating leases Operating Lease, Payments Unrealized gain (loss) on marketable securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Dividends Dividends Other receivables Other Receivables Capital Unit, Class B Capital Unit, Class B [Member] Redeemable Preferred Stock Increase (Decrease) in Temporary Equity [Roll Forward] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Alternate Base Rate Alternate Base Rate [Member] Alternate Base Rate Net loss and noncontrolling interest attributable to Legacy AON Stockholders prior to the reverse recapitalization Net loss attributable to Legacy AON Shareholders Net loss and noncontrolling interest attributable to Legacy AON Stockholders prior to the reverse recapitalization Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Before Recapitalization Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Before Recapitalization Earnout shares not outstanding (in shares) Derivative Instrument, Contingent Consideration, Liability, Shares Derivative Instrument, Contingent Consideration, Liability, Shares Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Class of Stock [Domain] Class of Stock [Domain] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Net loss attributable to Class A Common Stockholders, Basic Net loss attributable to Class A Common Stockholders for basic earnings per share Net Income (Loss) Available to Common Stockholders, Basic Debt Instrument [Axis] Debt Instrument [Axis] Effective income tax rate (in percent) Effective Income Tax Rate Reconciliation, Percent Present value of lease liabilities Operating Lease, Liability Fair value adjustment to redeemable noncontrolling interest Redeemable Noncontrolling Interest, Equity, Fair Value Adjustment Redeemable Noncontrolling Interest, Equity, Fair Value Adjustment Impact of the Reverse Recapitalization (in units) Common Unit, Unit Impact Of The Reverse Recapitalization Common Unit, Unit Impact Of The Reverse Recapitalization 2024 (remainder of year after March 31, 2024) Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Measurement Input Type [Domain] Measurement Input Type [Domain] 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after Year One Through Five Organization, Consolidation and Presentation of Financial Statements [Abstract] Amortization of operating right-of-use assets Operating Lease, Right-of-Use Asset, Periodic Reduction Reverse recapitalization, equity conversion ratio Reverse Recapitalization, Equity Conversion Ratio Reverse Recapitalization, Equity Conversion Ratio Accrued other Other Accrued Liabilities Assets Lease, Right-Of-Use Asset [Abstract] Lease, Right-Of-Use Asset Furniture, fixtures and equipment Furniture, Fixtures and Equipment [Member] Furniture, Fixtures and Equipment Ownership interest Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Segments Segment Reporting, Policy [Policy Text Block] Total current assets Assets, Current Financing cash flows from finance leases Finance Lease, Principal Payments Finance Lease, Liability, to be Paid, Maturity Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Accounts receivable Accounts Receivable, after Allowance for Credit Loss Supplemental noncash investing and financing activities Supplemental Cash Flow Information [Abstract] Other (expense) income, net Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category PNC Loan Facility PNC Loan Facility [Member] PNC Loan Facility Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Repurchases of Class A Common Stock (in shares) Stock Repurchased During Period, Shares Concentration risk (in percentage) Concentration Risk, Percentage AON Common Unit AON Common Unitholders [Member] AON Common Unitholders Measurement Input, Expected Dividend Rate Measurement Input, Expected Dividend Rate [Member] Other Other Sundry Liabilities, Current Class of warrant outstanding (in shares) Class of Warrant or Right, Outstanding Granted (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Patient Visits Patient Visits [Member] Patient Visits And Shipments Of Prescriptions 2028 Finance Lease, Liability, to be Paid, Year Four Contribution from noncontrolling interest Noncash Contributions From Noncontrolling Interest Noncash Contributions From Noncontrolling Interest Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Number of days after redemption notice date that redemption must be settled Stockholders' Equity, Number Of Days After The Redemption Notice Date For Redemption To Be Settled Stockholders Equity, Number Of Days After The Redemption Notice Date For Redemption To Be Settled Class of Stock [Axis] Class of Stock [Axis] Accrued other Accrued other Other Accrued Liabilities, Current Fair Value Adjustment of Warrants Fair Value Adjustment of Warrants Depreciation and amortization Depreciation, Depletion and Amortization Beginning balance (in units) Ending balance (in units) Common unit, units outstanding (in units) Common Unit, Outstanding Net loss before redeemable noncontrolling interest Net Income (Loss), Including Portion Attributable To Redeemable Noncontrolling Interest Net Income (Loss), Including Portion Attributable To Redeemable Noncontrolling Interest Net income (loss) attributable to common shareholders Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Accrued compensation related costs Increase (Decrease) in Employee Related Liabilities Statement of Financial Position [Abstract] Cash and cash equivalents and available-for-sale securities, amortized cost Cash, Cash Equivalents And Available-For-Sale Debt Securities, Amortized Cost Cash, Cash Equivalents And Available-For-Sale Debt Securities, Amortized Cost Business Combination and Asset Acquisition [Abstract] Total AON stockholders' deficit Equity, Attributable to Parent Total notes receivables Financing Receivable, after Allowance for Credit Loss Participating Threshold [Domain] Participating Threshold [Domain] Participating Threshold [Domain] Current Liabilities Current Liabilities Assumed In Reverse Recapitalization Current Liabilities Assumed In Reverse Recapitalization Beginning balance (in units) Ending balance (in units) Limited Liability Company (LLC), Units, Outstanding Limited Liability Company (LLC), Units, Outstanding Restricted Stock Restricted Stock [Member] Dividends Paid, Event Prior to June 7, 2026, After June 7, 2025 Dividends Paid, Event Prior to June 7, 2026, After June 7, 2025 [Member] Dividends Paid, Event Prior to June 7, 2026, After June 7, 2025 Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Finance 
Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Shares awarded upon vesting of RSUs (in shares) Shares Awarded Upon Vesting Shares Awarded Upon Vesting Concentration Risk Type [Axis] Concentration Risk Type [Axis] Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Warrants, measurement input Warrants and Rights Outstanding, Measurement Input Common unit authorized (in units) Common Unit, Authorized Long-term Lease Liability, Noncurrent [Abstract] Lease Liability, Noncurrent Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Level 2 Fair Value, Inputs, Level 2 [Member] Other comprehensive income attributable to Legacy AON Shareholders Other Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Before Recapitalization Other Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Before Recapitalization Entity Emerging Growth 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Lessee, Operating Lease, Liability, to be Paid, Year Four Promissory note issued in connection with acquisition Notes Issued Equity-based compensation Share-Based Payment Arrangement, Noncash Expense Other Other Miscellaneous Receivables, Net, Current Other Miscellaneous Receivables, Net, Current Changes in fair value adjustments of warrants and derivative liabilities Gain (Loss) On Warrant And Derivative, Net Gain (Loss) On Warrant And Derivative, Net Cash and cash equivalents Cash And Cash Equivalents Acquired Through Reverse Recapitalization Cash And Cash Equivalents Acquired Through Reverse Recapitalization Common Stock Common Stock [Member] City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Dividends Paid, Event Prior to June 7, 2025, After June 7, 2024 Dividends Paid, Event Prior to June 7, 2025, After June 7, 2024 [Member] Dividends Paid, Event Prior to June 7, 2025, After June 7, 2024 Net Loss Per Share Earnings Per Share [Text Block] Product and Service [Axis] Product and Service [Axis] Equity method investment (in percent) Equity Method Investment, Ownership Percentage Document Fiscal Year Focus Document Fiscal Year Focus Total deficit Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Inventory [Domain] Inventory [Domain] Other comprehensive loss attributable to Legacy AON Shareholders Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Before Recapitalization Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Before Recapitalization Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest LLC ownership threshold, percentage Limited Liability Company (LLC), Ownership Threshold, Percentage Limited Liability Company (LLC), Ownership Threshold, Percentage Supplier [Domain] Supplier [Domain] Software Software and Software Development Costs [Member] Minimum Minimum [Member] Statement of Cash Flows [Abstract] Assets Assets [Abstract] 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] Available-for-Sale Securities, Debt Maturities [Abstract] Available-for-Sale Securities, Debt Maturities [Abstract] Operating lease liabilities Increase (Decrease) in Operating Lease Liability Liabilities Liabilities [Abstract] Professional Malpractice Liability Insurance Professional Malpractice Liability Insurance [Member] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Other revenue Product and Service, Other [Member] Unamortized debt issuance costs Debt Issuance Costs, Gross Net loss before noncontrolling interest Net loss before noncontrolling interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest U.S. Treasury securities US Treasury Securities [Member] Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Deferred tax asset, net Deferred Income Tax Assets, Net Payments to acquire interest in subsidiary Payments to Acquire Interest in Subsidiaries and Affiliates Retained
Earnings (Deficit) Retained Earnings [Member] Total liabilities, mezzanine equity, noncontrolling interest, and stockholders' equity Liabilities and Equity Amortized 
Cost Debt Securities, Available-for-Sale, Amortized Cost Other assets Other Assets, Noncurrent Ownership [Domain] Ownership [Domain] Earnings (loss) per unit, basic (in usd per share) Basic loss per share of Class A Common Stock (in dollars per share) Earnings Per Share, Basic Operating lease right-of-use assets Operating lease right-of-use assets, net Operating Lease, Right-of-Use Asset Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Lessee, Assets And Liabilities Lessee, Assets And Liabilities [Table Text Block] Lessee, Assets And Liabilities Warrant, term (in years) Warrants and Rights Outstanding, Term Number of days after five year anniversary Stockholders' Equity, Conversion, Number Of Days After Five Year Anniversary Stockholders' Equity, Conversion, Number Of Days After Five Year Anniversary Reverse recapitalization costs Reverse Recapitalization Expenses Reverse Recapitalization Expenses Capital Units by Class [Axis] Capital Units by Class [Axis] Undistributed net earnings, basic Undistributed Earnings, Basic 2024 (remainder of year after March 31, 2024) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Net loss attributable to Class A Common Stockholders, Diluted Net loss attributable to Class A Common Stockholders for diluted earnings per share Net Income (Loss) Available to Common Stockholders, Diluted Beginning balance Ending balance Members' Equity Entity Address, City or Town Entity Address, City or Town Related Party Related Party [Member] Inventory, Current [Table] Inventory, Current [Table] Class C Common Class C [Member] Principles of Consolidation Consolidation, Policy [Policy Text Block] Stockholders' Equity, Conversion Right [Axis] Stockholders' Equity, Conversion Rights [Axis] Stockholders' Equity, Conversion Rights Supplemental Condensed Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Accrued other Increase (Decrease) in Other Accrued Liabilities Document Transition Report Document Transition Report Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Cost of Goods and Service Benchmark Cost of Goods and Service Benchmark [Member] Accounts payable Increase (Decrease) in Accounts Payable Common stock, shares authorized (in shares) Common Stock, Shares Authorized Digital Transformation Opportunities Corp. (“DTOC”) Digital Transformation Opportunities Corp. (“DTOC”) [Member] Digital Transformation Opportunities Corp. (“DTOC”) Collections on notes receivable - related parties Proceeds from Collection of Notes Receivable Short-term marketable securities Estimated Fair
Value Total Debt Securities, Available-for-Sale Document Information [Table] Document Information [Table] Excess redeemable noncontrolling interest over carrying amount Redeemable Noncontrolling Interest, Equity, Excess Over Carrying Amount Redeemable Noncontrolling Interest, Equity, Excess Over Carrying Amount Gross Unrealized
Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Stockholders' equity, conversion, threshold volume weighted average price period Stockholders' Equity, Conversion, Threshold Volume Weighted Average Price Period Stockholders' Equity, Conversion, Threshold Volume Weighted Average Price Period Liquidation preference Temporary Equity, Liquidation Preference Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] ROU assets obtained in exchange for new lease liabilities Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Right-Of-Use Asset Obtained In Exchange For Lease Liability Total Long-Term Debt, Gross Adjustments to reconcile net loss to net cash provided by operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Related Party Transactions [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Supplier Concentration Risk Supplier Concentration Risk [Member] Allocation of income to controlling and noncontrolling interests (in percent) Allocation of income to controlling and noncontrolling interests Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Redemptions (in units) Common Unit, Redemptions Common Unit, Redemptions Common stock, value Common Stock, Value, Outstanding Percentage of outstanding stock maximum (in percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum Automobiles Automobiles [Member] AEA Growth Management LP AEA Growth Management LP [Member] AEA Growth Management LP Other comprehensive loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Additional paid-in capital Additional Paid in Capital Intravenous drugs Intravenous Drugs [Member] Intravenous Drugs Inventory [Axis] Inventory [Axis] Forfeited (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Document Information [Line Items] Document Information [Line Items] Incremental borrowing rate Financing Receivable, Borrowing Rate Financing Receivable, Borrowing Rate Dividends Paid, Event Prior to June 7, 2024 Dividends Paid, Event Prior to June 7, 2024 [Member] Dividends Paid, Event Prior to June 7, 2024 Gain on sale of property and equipment Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property AON Inc. New AON (AON Inc.) New AON (AON Inc.) [Member] New AON (AON Inc.) Other receivables Increase (Decrease) in Other Receivables Number of board of managers designated by majority common unit holders Number Of Board Of Managers Designated By Majority Common Unit Holders Number Of Board Of Managers Designated By Majority Common Unit Holders Present value of lease liabilities Finance Lease, Liability Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Equity Investment in Affiliate Equity Method Investments [Policy Text Block] Other comprehensive gain (loss) Other Comprehensive Income (Loss), Net Of Tax, Including Redeemable Noncontrolling Interest Other Comprehensive Income (Loss), Net Of Tax, Including Redeemable Noncontrolling Interest Stock price (in usd per share) Share Price Related Party, Type [Axis] Related Party, Type [Axis] Other assets Other Assets Entity Registrant Name Entity Registrant Name Other assets Increase (Decrease) in Other Operating Assets Pledged collateral Debt Instrument, Collateral Amount Fair value of warrants Warrant liability Warrants and Rights Outstanding Noncontrolling interest Equity, Attributable to Noncontrolling Interest Document Period End Date Document Period End Date Proceeds from lines of credit Proceeds from Lines of Credit Accrued dividend rate (in percent) Preferred Stock, Dividend Rate, Percentage London Interbank Offered Rate (LIBOR) 1 London Interbank Offered Rate (LIBOR) 1 [Member] London Interbank Offered Rate (LIBOR) 1 Weighted-average discount rate for finance leases (in percent) Finance Lease, Weighted Average Discount Rate, Percent Long-term finance lease liabilities (included in other long-term liabilities) Long-term lease liabilities, net of current portion Finance Lease, Liability, Noncurrent Treasury Stock Treasury Stock, Common [Member] Entity Central Index Key Entity Central Index Key Dividends Paid, Event After June 7, 2028 Dividends Paid, Event After June 7, 2028 [Member] Dividends Paid, Event After June 7, 2028 Thereafter Lessee, Operating Lease, Liability, to be Paid, Due after Year Four Lessee, Operating Lease, Liability, to be Paid, Due after Year Four 2023 Incentive Equity Plan 2023 Incentive Equity Plan [Member] 2023 Incentive Equity Plan Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Stock compensation expense Share-Based Payment Arrangement, Expense Income tax expense Income Tax Expense (Benefit) Shares authorized (shares) Temporary Equity, Shares Authorized Finance lease right-of-use assets, net (included in property and equipment, net) Finance Lease, Right-of-Use Asset, after Accumulated Amortization Accrued compensation related costs Employee-related Liabilities, Current Repayments on finance lease liabilities Payments of Financing Costs Number of operating segments Number of Operating Segments Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Capital Unit, Class A-1 Capital Unit, Class A-1 [Member] Capital Unit, Class A-1 Schedule of Reverse Recapitalization, Changes in Units Schedule Of Reverse Recapitalization, Changes In Units [Table Text Block] Schedule Of Reverse Recapitalization, Changes In Units Equity [Abstract] Debt Securities, Available-for-Sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Weighted-average remaining lease term for operating leases (in years) Operating Lease, Weighted Average Remaining Lease Term Total lease liabilities Lease, Liability Lease, Liability Private Placement Warrants Private Placement Warrants [Member] Private Placement Warrants Total revenue Revenue Revenue from Contract with Customer, Excluding Assessed Tax Other receivables Other receivables Other Receivables, Net, Current Entity [Domain] Entity [Domain] Reverse Recapitalization, Change In Value Of Units [Roll Forward] Reverse Recapitalization, Change In Value Of Units [Roll Forward] Reverse Recapitalization, Change In Value Of Units Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Recapitalization exchange ratio, units Recapitalization Exchange Ratio, Units Recapitalization Exchange Ratio, Shares Preferred Class A Preferred Class A [Member] Redeemable convertible preferred stock, shares outstanding (in shares) Beginning Balance (in shares) Ending Balance (in shares) Temporary Equity, Shares Outstanding Legal Entity [Axis] Legal Entity [Axis] Current portion of operating and finance lease liabilities Finance and Operating Lease Liability, Current Finance and Operating Lease Liability, Current Money market funds Money Market Funds [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Increase (Decrease) In Noncontrolling Interest [Roll Forward] Increase (Decrease) In Redeemable Noncontrolling Interest [Roll Forward] Increase (Decrease) In Redeemable Noncontrolling Interest Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Weighted-average discount rate for operating leases (in percent) Operating Lease, Weighted Average Discount Rate, Percent Debt Instrument, Threshold Limit, Period One Debt Instrument, Threshold Limit, Period One [Member] Debt Instrument, Threshold Limit, Period One Legacy AON Shareholders Legacy AON Shareholders [Member] Legacy AON Shareholders DTOC Unredeemed Shareholders DTOC Unredeemed Shareholders [Member] DTOC Unredeemed Shareholders Comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Equity-based compensation and NCI rebalancing (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Credit Facility [Domain] Credit Facility [Domain] Shares issued (in shares) Temporary Equity, Shares Issued Shares repurchased (in shares) Treasury Stock, Shares, Acquired Signs Signs [Member] Signs Loss before equity loss in affiliate and noncontrolling interest Income (Loss) From Continuing Operations Before Equity Method Investments, Net Of Tax Income (Loss) From Continuing Operations Before Equity Method Investments, Net Of Tax Business Combinations Business Combinations Policy [Policy Text Block] Basis spread (in percent) Debt Instrument, Basis Spread on Variable Rate Long-term debt, net Long-Term Debt, Excluding Current Maturities Weighted-average remaining lease term for finance leases (in years) Finance Lease, Weighted Average Remaining Lease Term Leasehold improvements Leasehold Improvements [Member] Noncash consideration of equity method investment Noncash Consideration, Fair Value Of Consideration For Equity Method Investment Noncash Consideration, Fair Value Of Consideration For Equity Method Investment Weighted average shares for diluted loss per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Subsidiary Under Common Control of Class A-1 Member Subsidiary Under Common Control Of Class A-1 Member [Member] Subsidiary Under Common Control Of Class A-1 Member Malpractice insurance, limit per policy period Malpractice Insurance, Annual Coverage Limit Costs and expenses Operating Expenses [Abstract] Less: amount representing interest Finance Lease, Liability, Undiscounted Excess Amount Transaction expenses Reverse Recapitalization Transaction Costs Reverse Recapitalization Transaction Costs Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Debt Instrument, Threshold Limit, Period [Axis] Debt Instrument, Threshold Limit, Period [Axis] Debt Instrument, Threshold Limit, Period Additional Paid in Capital Additional Paid-in Capital [Member] Total assets Assets Equity in loss of affiliate Equity in loss of affiliate Income (Loss) from Equity Method Investments Issuance of units (in units) Common Unit, Issued During Period Common Unit, Issued During Period Right-of-use assets and lease liabilities removed in termination of lease Lease, Right-Of-Use Asset And Liability Reduction From Lease Terminations Lease, Right-Of-Use Asset And Liability Reduction From Lease Terminations Cover [Abstract] Description Of Business And Significant Accounting Policies [Table] Description Of Business And Significant Accounting Policies [Table] Description Of Business And Significant Accounting Policies [Table] Number of states in which entity operates Number of States in which Entity Operates Equity-based compensation and NCI rebalancing APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Amortization of debt issuance costs Amortization of Debt Issuance Costs Participating Threshold, 3 Participating Threshold, 3 [Member] Participating Threshold, 3 Number of offices with operating lease Number Of Offices With Operating Leases Number Of Offices With Operating Leases Preferred units, outstanding (in units) Preferred Units, Outstanding Series A Preferred Stock Series A Preferred Stock [Member] Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Payments of dividends Payments of Dividends Other long-term liabilities Other Liabilities, Noncurrent Vested (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Total lease payments Lessee, Operating Lease, Liability, to be Paid Construction-in-progress Construction in Progress [Member] Thereafter Finance Lease, Liability, to be Paid, Due after Year Four Finance Lease, Liability, to be Paid, Due after Year Four Stockholders Stockholders [Member] Stockholders Amortization of finance lease right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Common Class A-1 Common Class A-1 [Member] Common Class A-1 Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Redemption of Class B Common Stock to Class A Common Stock (in shares) Stock Redeemed or Called During Period, Shares Loss before income taxes, equity loss in affiliate, and noncontrolling interest Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Total comprehensive loss attributable to Class A Common Stockholders Comprehensive Income (Loss), Net Of Tax, Attributable To Common Stockholders Comprehensive Income (Loss), Net Of Tax, Attributable To Common Stockholders Equity Component [Domain] Equity Component [Domain] Less: current portion of lease liabilities Current portion of finance lease liabilities (included in accrued other) Less: current portion of lease liabilities Finance Lease, Liability, Current Participating Threshold, 2 Participating Threshold, 2 [Member] Participating Threshold, 2 Original
Principal Financing Receivable, After allowance For Credit Loss, Original Principal Financing Receivable, After allowance For Credit Loss, Original Principal Debt Instrument [Line Items] Debt Instrument [Line Items] Weighted average shares for basic loss per share (in shares) Weighted average shares for basic earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Concentration Risk Type [Domain] Concentration Risk Type [Domain] Schedule of Other Accrued Liabilities, Current Schedule Of Other Accrued Liabilities, Current [Table Text Block] Schedule Of Other Accrued Liabilities, Current Loss from operations Operating Income (Loss) Dividends Paid, Event Prior to June 7, 2028, After June 7, 2027 Dividends Paid, Event Prior to June 7, 2028, After June 7, 2027 [Member] Dividends Paid, Event Prior to June 7, 2028, After June 7, 2027 Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] AOCI AOCI Including Portion Attributable to Noncontrolling Interest [Member] Insurance Type and Tier Identifier [Axis] Insurance Type and Tier Identifier [Axis] Overnight Repurchase Agreements Overnight Repurchase Agreements [Member] Overnight Repurchase Agreements Revenue Revenues [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Cost of revenue Cost of Revenue Prepaid expenses and other current assets Prepaid Expense and Other Assets Participating Threshold, 1 Participating Threshold, 1 [Member] Participating Threshold, 1 Other comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Gain (loss) on issuance of warrants Gain (Loss) On Issuance Of Warrants Gain (Loss) On Issuance Of Warrants Related Party Transaction [Axis] Related Party Transaction [Axis] Allocation of losses to controlling and noncontrolling interests (in percent) Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Allocation Of Losses Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Allocation Of Losses Unused line fee (in percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Statement [Line Items] Statement [Line Items] Dividends [Axis] Dividends [Axis] Debt Securities, Available-for-Sale Debt Securities, Available-for-Sale [Table Text Block] Proceeds from facility Proceeds from Long-Term Lines of Credit Liabilities Lease, Liability [Abstract] Lease, Liability Noncontrolling Interest Noncontrolling Interest [Member]