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Taxes OneOncology OneOncology [Member] OneOncology Other, net Payment for (Proceeds from) Other Investing Activity Inventories Increase (Decrease) in Inventories Segment Reporting [Table] Segment Reporting [Table] $500,000, 4.250% senior notes due 2030 $500,000, 4.250% Senior Notes Due 2030 [Member] $500,000, 4.250% Senior Notes Due 2030 Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Current Acquisition date, revenue Business Combination, Acquiree's Revenue since Acquisition Date, Actual Estimated liability in Accrued Expenses and Other Business Combination, Contingent Consideration, Liability, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Total segment 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stock, issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Schedule of VIE's Assets and Liabilities Schedule of Variable Interest Entities [Table Text Block] Treasury stock (in shares) Treasury Stock, Common, Shares Principal payment Debt Instrument, Repaid, Principal Equity Components [Axis] Equity Components [Axis] Expense period (in years) Business Combination, Contingent Consideration, Liability, Term Business Combination, Contingent Consideration, Liability, Term Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] 3.625% Senior Notes due 2032 €500,000, 3.625% senior notes due 2032 €500,000, 3.625% Senior Notes Due 2032 [Member] €500,000, 3.625% Senior Notes Due 2032 Entity Interactive Data Current Entity Interactive Data Current Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Variable Interest Entity [Line Items] Variable Interest 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Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Repurchase of common stock (in shares) Treasury Stock, Shares, Acquired 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Retained ownership (as a percent) Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Accrued expenses and other Accrued Liabilities and Other Liabilities Accrued expenses Increase (Decrease) in Accrued Liabilities Restricted cash Restricted Cash Purchases of common stock Payments for Repurchase of Equity Cash acquired Cash Acquired from Acquisition Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Business transformation efforts Business Exit Costs Legal Entity [Axis] Legal Entity [Axis] Prepaid expenses and other Prepaid Expense and Other Assets Purchases of common stock Repurchase of common stock Treasury Stock, Value, Acquired, Cost 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Vested in Covered Year [Member] Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Money Market Facility from April 1 through December 1 Money Market Facility from April 1 through December 1 [Member] Money Market Facility from April 1 through December 1 Debt Instrument [Axis] Debt Instrument [Axis] Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Cash Payments to Acquire Businesses, Gross Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Disposal Group Name [Axis] Disposal Group Name [Axis] Basic (in usd per share) Earnings Per Share, Basic Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Current Measurement Input Type [Axis] Measurement Input Type [Axis] Total current assets Assets, Current Receivables securitization facility due in 2028 Receivables Securitization Facility [Member] Insider Trading Arrangements [Line Items] Long-term debt Long-term debt Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, less allowances for returns and credit losses: June 30, 2026 - $1,735,207; September 30, 2025 - $1,796,172 Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Adjustments to RCA and OneOncology equity units Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] March 2024 Share Repurchase Program March 2024 Share Repurchase Program [Member] March 2024 Share Repurchase Program Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] $700,000, 5.150% senior notes due 2035 $700,000, 5.150% Senior Notes Due 2035 [Member] $700,000, 5.150% Senior Notes Due 2035 Thereafter Finite-Lived Intangible Asset, Expected Amortization, After Year Four Finite-Lived Intangible Asset, Expected Amortization, After Year Four Fair Value Measurement [Domain] Fair Value Measurement [Domain] Contingent consideration Business Combination, Contingent Consideration, Liability Remeasurement gain related to OneOncology acquisition (Note 2) Remeasurement gain related to OneOncology acquisition Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain (Loss) Litigation and opioid-related (credit) expenses, net Litigation and opioid-related credit (expenses), net Litigation Settlement, Fee Expense Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] MWI Animal Health Business MWI Animal Health Business [Member] MWI Animal Health Business Foreign currency translation Goodwill, Foreign Currency Translation, Gain (Loss) U.S. Healthcare Solutions U.S. Healthcare Solutions U.S. Healthcare Solutions [Member] U.S. Healthcare Solutions Equity Awards Adjustments Equity Awards Adjustments [Member] TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity Restructuring and Other Expenses, Net Restructuring, Impairment, and Other Activities Disclosure [Text Block] Employee Stock Option Share-Based Payment Arrangement, Option [Member] Short-term debt Debt, Current Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Stockholders' Equity and Earnings per Share Stockholders' Equity And Weighted Average Common Shares Outstanding [Text Block] Stockholders' Equity And Weighted Average Common Shares Outstanding Restructuring and other expenses, net Total restructuring and other expenses, net Restructuring and other expenses, net Restructuring Charges Tabular List, Table Tabular List [Table Text Block] Accrued litigation expense Loss Contingency Accrual, Loss (Reversal of Loss) Finite-lived Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name 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 Combination, Contingent Consideration, Type [Domain] Business Combination, Contingent Consideration, Type [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Number of pending claims Loss Contingency, Pending Claims, Number Schedule of Fair Value of the Intangible Assets Acquired Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Class of Stock [Domain] Class of Stock [Domain] Multi-Year Term Loan Facility Multi-Year Term Loan Facility [Member] Multi-Year Term Loan Facility Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Recognized amounts of identifiable assets acquired and liabilities assumed Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) [Abstract] Accrued expenses and other Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable 364-Day Term Loan Facility 364-Day Term Loan Facility [Member] 364-Day Term Loan Facility Discontinued Operations and Disposal Groups [Abstract] Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other, net Other Noncash Income (Expense) Acquisition Noncontrolling Interest, Increase from Business Combination Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Currency remeasurement gain Deferred Tax Assets, Unrealized Currency Remeasurement, Gain (Loss) Deferred Tax Assets, Unrealized Currency Remeasurement, Gain (Loss) Estimated fair value of total consideration Business Combination, Consideration Transferred Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Goodwill impairment Goodwill, Impairment Loss Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Expense period Measurement Input, Expected Term [Member] Company Selected Measure Amount Company Selected Measure Amount Schedule Reportable and Operating Segment Disaggregated Revenue Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Gain on remeasurement Equity Securities, FV-NI, Unrealized Gain (Loss) Total depreciation and amortization Depreciation, Depletion and Amortization Net income Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Tax benefits that would reduce income tax expense and effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Current assets: Assets, Current [Abstract] Settlement award, net of fees and expenses Insurance Recoveries Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Depreciation Depreciation, Nonproduction Income tax expense Income Tax Expense (Benefit) Cost of goods sold Total segment cost of goods sold Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] DECREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Potential payment Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount Other intangible assets Other Intangible Assets, Net Current estimate recorded in accrued expenses and other Loss Contingency, Accrual, Current Profarma Variable Interest Entity, Primary Beneficiary [Member] Deferred income taxes Business Combination, Recognized Liability Assumed, Deferred Tax Liability Short-term debt Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Short Term Debt Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Short Term Debt Insurance carriers paid Proceeds from Legal Settlements Net income attributable to Cencora, Inc. Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Segment Reconciling Items Acquisition-related intangibles amortization Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Number of distributors Number Of Distributors Number Of Distributors Restatement Determination Date: Restatement Determination Date [Axis] Reallocated goodwill Goodwill, Transfers $1,000,000, 2.700% senior notes due 2031 $1,000,000, 2.700% Senior Notes Due 2031 [Member] $1,000,000, 2.700% Senior Notes Due 2031 Acquisitions Noncontrolling Interest, Adjustment From Business Combination Noncontrolling Interest, Adjustment From Business Combination Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Prepaid expenses and other Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current