Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Schedule of Other Intangible Assets Intangible Asset and Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Schedule of Other Assets, Noncurrent Schedule of Other Assets, Noncurrent [Table Text Block] Maximum Maximum [Member] Unrealized (losses)/gains on marketable debt securities, tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Equity [Line Items] Equity [Line Items] Equity [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Other rebates, returns, discounts and adjustments Other Rebates, Returns, Discounts and Adjustments [Member] Other rebates, returns, discounts and adjustments [Member] Short-Term Debt, Type [Axis] Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Other termination costs Other Restructuring Costs Percent of aggregate total trade receivables due from three pharmaceutical wholesalers Percentage Of Aggregate Total Trade Receivables Due The percentage of aggregate trade receivables due from customers accounting for more than 10% of total trade receivables. Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Customer [Axis] Customer [Axis] Restructuring Plan [Axis] Restructuring Plan [Axis] Royalty income - divestitures (Note 4) Business Sale Royalty Income This element represents royalty income recognized in other income during the period related to the sale of a business. Contingent value rights Contingent Value Rights [Member] BMY Contingent Value Rights [Member] Hengrui Hengrui [Member] Hengrui Acquisitions, Divestitures and Other Arrangements [Abstract] Acquisitions, Divestitures and Other Arrangements [Abstract] Acquisitions, Divestitures and Other Arrangements [Abstract] Employee compensation and benefits Employee-related Liabilities, Current Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table] Schedule of Long-term Debt and Current Portion of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Other Other Assets, Miscellaneous, Noncurrent Nature of Expense [Axis] Nature of Expense [Axis] Other Other Prepaid Expense, Current Medicaid and Medicare rebates Medicaid and Medicare rebates [Member] Medicaid and Medicare rebates [Member] Integration expenses (Note 6) Integration expenses Business Combination, Integration-Related Cost, Expense Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Acquired IPRD Acquired IPRD Acquired IPRD Derivative Instrument [Axis] Derivative Instrument [Axis] Equity [Table] Equity [Table] Equity Amendment Flag Amendment Flag Total charges Restructuring Costs and Asset Impairment Charges Current liabilities: Liabilities, Current [Abstract] Research Other Research [Member] Other Research Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Other revenues Other Revenues [Member] Other revenues [Member] Other non-current assets Inventories (Note 12) Inventory, Noncurrent Royalty income, nonoperating Royalty Income, Nonoperating Other comprehensive income/(loss), net of taxes and reclassifications to earnings: Other Comprehensive Income (Loss), Net of Tax [Abstract] Pension and postretirement benefits, pre-tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Rebates and discounts Accrued Rebates And Returns Carrying value as of the balance sheet date of obligations incurred and payable pertaining to rebates to government programs and sales returns. Property, Plant, and Equipment [Abstract] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Asset Acquisition [Axis] Asset Acquisition [Axis] Licensing and Other Arrangements [Domain] Licensing and Other Arrangements [Domain] Licensing and Other Arrangements Other intangible assets Other intangible assets Intangible Asset, Excluding Goodwill, after Accumulated Amortization Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract] Derivative, notional amount Derivative, Notional Amount Weighted-average common shares outstanding – basic (in shares) Weighted Average Number of Shares Outstanding, Basic Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Equity investments (Note 9) Equity Investments, Noncurrent Equity Investments, Noncurrent Camzyos Camzyos [Member] Camzyos Total Current liabilities Liabilities, Current Performance obligation satisfied in previous period Contract with Customer, Performance Obligation Satisfied in Previous Period Work in process Inventory, Work in Process, Net of Reserves Short-Term Debt, Type [Domain] Short-Term Debt, Type [Domain] Concentration Risk [Table] Concentration Risk [Table] Pre-tax gains Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Entity Address, City or Town Entity Address, City or Town Number of units granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Actuarial gains/(losses), tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] RECEIVABLES Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Impairments and downward adjustments Equity Securities without Readily Determinable Fair Value, Impairment Loss And Downward Price Adjustment, Annual Amount Equity Securities without Readily Determinable Fair Value, Impairment Loss And Downward Price Adjustment, Annual Amount Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Class of Stock [Axis] Class of Stock [Axis] Royalty expense Royalty Expense Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Alliance, royalties, VAT and other Accounts and Other Receivables, Net, Current Equity investments without RDFV Equity Securities, FV-NI and without Readily Determinable Fair Value [Abstract] Inventory, Net [Abstract] Inventory, Net [Abstract] Settlements, after tax Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax Accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Total other comprehensive income/(loss) Other comprehensive income/(loss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Current portion of Long-term debt Long-Term Debt, Current Maturities Collaborative Arrangement and Arrangement Other than Collaborative [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] United States UNITED STATES Concentration Risk Type [Axis] Concentration Risk Type [Axis] Derivatives qualifying as cash flow hedges Derivatives qualifying as cash flow hedges, after tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Schedule of Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Reblozyl License Reblozyl License [Member] Reblozyl License Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Litigation Case [Axis] Litigation Case [Axis] Recognized in other comprehensive income/(loss), tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Noncontrolling Interest Noncontrolling Interest [Member] Use of Estimates and Judgments Use of Estimates, Policy [Policy Text Block] Impairment charges Impairment of Long-Lived Assets to be Disposed of Pension and postretirement benefits, tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Cumulative upward adjustments Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount Licensing Arrangements [Table] Licensing Arrangements [Table] Licensing Arrangements [Table] Schedule of Other Current Liabilities Schedule of Accrued Liabilities [Table Text Block] Other comprehensive income, pre-tax Other Comprehensive Income (Loss), before Tax Total Long-Term Debt Renewal period (in years) Long-term Debt, Renewal Period Long-term Debt, Renewal Period Other revenue Other Revenue, Hedging Activities [Member] Other Revenue, Hedging Activities PROPERTY, PLANT AND EQUIPMENT Property, Plant, and Equipment [Text Block] Acquired product rights Acquired Marketed Product Rights [Member] Acquired Marketed Product Rights Income taxes payable Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date Net cash provided by/(used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Other termination costs Other Termination Costs [Member] Other Termination Costs Principal value Debt Instrument, Face Amount EQUITY Equity [Text Block] Restructuring and related cost, cost incurred to date Restructuring and Related Cost, Cost Incurred to Date Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Revlimid Revlimid [Member] Revlimid [Member] Less cost of treasury stock Treasury Stock, Common, Value Total GTN adjustments Gross to Net Adjustments Gross to Net Adjustments Purchase of marketable debt securities Payments to Acquire Marketable Securities Accumulated other comprehensive loss Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Net investment hedge gains Derivatives used in Net Investment Hedge, Net of Tax Operating leases Operating Lease, Liability, Current Interest Interest Payable, Current Business Segment Information Segment Reporting, Policy [Policy Text Block] Property, Plant, and Equipment Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] EARNINGS/(LOSS) PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Derivatives qualifying as cash flow hedges AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Earnings/(Loss) per common share: Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items] Schedule Of Other Income Expense Schedule Of Other Income Expense [Table Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block] Total Liabilities Liabilities Trading Symbol Trading Symbol License and other arrangements upfront payments License and Other Arrangements Upfront Payments License and Other Arrangements Upfront Payments 3.363% Notes due 2033 3.363% Notes due 2033 [Member] 3.363% Notes due 2033 Geographical [Domain] Geographical [Domain] IPRD Intangible Asset, Excluding Goodwill, Indefinite-Lived Capital expenditures Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Share-based Payment Arrangement, Nonvested Award, Cost Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block] Income taxes Accrued Income Taxes, Current Company Selected Measure Name Company Selected Measure Name Litigation and other settlements Gain (Loss) from Litigation Settlement Gross product sales Sales Revenue, Gross [Member] Sales Revenue, Gross [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Breyanzi Breyanzi [Member] Breyanzi FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Other Acquisition Plans Celgene and Other Acquisition Plans [Member] Celgene and Other Acquisition Plans Business Combination, Contingent Consideration, Type [Axis] Business Combination, Contingent Consideration, Type [Axis] Marketable debt securities Unrealized (losses)/gains on marketable debt securities, after tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Net Proceeds Proceeds from Divestiture of Businesses, Net of Cash Divested Maximum aggregate contingent and regulatory milestone payments Contingent and Regulatory Milestone Payments, Maximum Aggregate Contingent and Regulatory Milestone Payments, Maximum Aggregate Rebates and discounts Increase (Decrease) in Other Accrued Liabilities Credit Facility [Domain] Credit Facility [Domain] Cash Flows From Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Dividends Dividends Payable, Current Other Growth products Other Growth Brands [Member] Other Growth Brands Individual: Individual [Axis] Weighted-average common shares outstanding – diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Account Receivables [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Cross-currency swap contracts Cross Currency Interest Rate Contract [Member] Cobenfy Cobenfy [Member] Cobenfy Entity Emerging Growth Company Entity Emerging Growth Company Celgene Contingent Value Rights Celgene Contingent Value Rights [Member] Celgene Contingent Value Rights [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Pension and postretirement Liability, Defined Benefit Plan, Noncurrent Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] Disposal Group Name [Domain] Disposal Group Name [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Commercial paper Commercial Paper [Member] U.S. Treasury securities US Treasury Securities [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Percentage of net sales payable to alliance partner Percentage Of Net Sales Payable To Alliance Partner Percentage Of Net Sales Payable To Alliance Partner Yervoy Yervoy [Member] Divestitures Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Short-term debt obligations Short-Term Debt Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Gross to Net Adjustments [Axis] Gross to Net Adjustments [Axis] Gross to Net Adjustments [Axis] Sotyktu Sotyktu [Member] Sotyktu Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Schedule of Other Comprehensive Income (Loss) Comprehensive Income (Loss) [Table Text Block] Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Employee termination costs Severance Costs Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Derivatives designated as cash flow hedges General Cash Flow Hedge Information [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Indefinite-lived Intangible Assets, Major Class Name [Domain] Intangible Asset, Indefinite-Lived, Class [Domain] Debt instrument, maximum amount authorized for issuance Commercial Paper, Maximum Aggregate Capacity Commercial Paper, Maximum Aggregate Capacity Incremental shares attributable to share-based compensation plans (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Other shutdown (income)/expense, net Other Shutdown (Income) Expense, Net Other Shutdown (Income) Expense, Net Asset acquisition, share price (in dollars per share) Asset Acquisition, Share Price Asset Acquisition, Share Price All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Actuarial gains/(losses), after tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax ALLIANCES [Abstract] ALLIANCES [Abstract] ALLIANCES [Abstract] Depreciation expense Depreciation Royalty Income Royalty Income, Income From Divestiture Royalty Income, Income From Divestiture Asset Acquisition [Domain] Asset Acquisition [Domain] Scenario [Domain] Scenario [Domain] Divestiture gains and royalties Divestiture Gains And Royalties This represents the amount of gains and royalties as a result of business divestitures. Operating leases Operating Lease, Right-of-Use Asset Pension and postretirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Prior period gross to net adjustment impacted by new accounting pronouncement Prior Period Gross to Net Adjustment, Decrease (Increase) From Change in Estimate Prior Period Gross to Net Adjustment, Decrease (Increase) From Change in Estimate Schedule of Earnings/(Loss) Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Revenue Recognition Gross-To-Net Adjustments Reconciliation of Gross Product Sales to Net Product Sales [Table Text Block] Reconciliation of Gross Product Sales to Net Product Sales [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Pension and postretirement benefits Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Borrowings outstanding Long-Term Line of Credit Minimum Minimum [Member] Supplemental Financial Information [Abstract] Supplemental Financial Information [Abstract] Supplemental Financial Information [Abstract] Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Assets developed License and Other Arrangements, Number Of Assets Developed License and Other Arrangements, Number Of Assets Developed Research and development Accrued Research And Development Carrying value as of the balance sheet date of obligations and payables pertaining to research and development. Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] LIABILITIES Liabilities [Abstract] Effect of exchange rates on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Money market and other securities Cash and Cash Equivalents, Fair Value Disclosure Total Equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Derivatives designated as net investment hedges Summary of Net Investment Hedge Activity [Abstract] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Earnings/(Loss) per common share Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Currency translation and other adjustments Goodwill, Foreign Currency Translation and Measurement Period Adjustments Schedule of Research and Development Expense [Table] Schedule of Research and Development Expense [Table] Schedule of Research and Development Expense Estimated useful lives (in years) Intangible Asset, Finite-Lived, Useful Life Drug Development Drug Development [Member] Drug Development Gross to Net Adjustments [Table] Nature of Operation, Product Information, Concentration of Risk [Table] Floating rate notes due 2026 Floating Rate Notes Due 2026 [Member] Floating Rate Notes Due 2026 Exercise Price Award Exercise Price Restructuring Cost [Table] Restructuring Cost [Table] Cash Flows From Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Licensing Arrangements [Line Items] Licensing Arrangements [Line Items] Licensing Arrangements Unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Sale and maturities of marketable debt securities Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Document Quarterly Report Document Quarterly Report Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] 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] Interest rate swap contracts Interest Rate Swap [Member] Cash proceeds Proceeds from Divestiture of Interest in Consolidated Subsidiaries FINANCING ARRANGEMENTS Debt Disclosure [Text Block] Scenario [Axis] Scenario [Axis] Repayments of long-term debt Repayments of Long-Term Debt Obligation to holders of the contingent value rights Contractual Obligation Licensing and Other Arrangements Licensing and Other Arrangements [Table Text Block] Licensing and Other Arrangements Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Limited partnerships and other investments Equity Method Investments Beginning balance Ending balance Restructuring Reserve Equity Component [Domain] Equity Component [Domain] ACQUISITIONS, DIVESTITURES, LICENSING AND OTHER ARRANGEMENTS Mergers, Acquisitions and Dispositions Disclosures [Text Block] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Foreign currency exchange contracts Foreign Exchange Contract [Member] Buildings Buildings and Improvements, Gross Trade receivables Accounts Receivable, before Allowance for Credit Loss, Current Total Expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Tecentriq royalties Tecentriq royalties [Member] Tecentriq royalties Euro Member Countries, Euro Euro Member Countries, Euro Cash dividends declared Dividends, Common Stock, Cash Interest rates Debt Instrument, Interest Rate, Stated Percentage Counterparty Name [Domain] Counterparty Name [Domain] Total BMS Shareholders’ equity Equity, Attributable to Parent Restructuring Type [Axis] Restructuring Type [Axis] Pension and postretirement Assets for Plan Benefits, Defined Benefit Plan Other short-term financing obligations, net Proceeds from Other Short-Term Debt Equity investments Equity investments with RDFV Equity Securities, FV-NI, Current ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Insider Trading Policies and Procedures [Line Items] Less allowance for expected credit loss Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance share units Performance Shares [Member] Income taxes Accrued Income Taxes, Noncurrent Intangible Asset Name [Axis] Intangible Asset Name [Axis] Intangible Asset Name Common Stock $0.10 Par Value Common Stock $0.10 Par Value [Member] CommonStock010ParValueMember Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Deferred income taxes Deferred Income Tax Expense (Benefit) Selling, general and administrative Selling, general and administrative Selling, General and Administrative Expense Other Legacy products Other Legacy Brands [Member] Other Legacy Brands Putative claims Loss Contingency, Pending Claims, Number, Putative Class Loss Contingency, Pending Claims, Number, Punitive Class Type of Restructuring [Domain] Type of Restructuring [Domain] Asset impairments Restructuring, Settlement and Impairment Provisions 4.581% Notes due 2055 4.581% Notes due 2055 [Member] 4.581% Notes due 2055 Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Construction in progress Construction in Progress, Gross Consideration for contingent development and regulatory approval Consideration For Contingent Development and Regulatory Approval This element represents that additional aggregate consideration for contingent development and regulatory approval milestone payments. Antidilutive securities excluded from computation of earnings per share, amount (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restricted stock units Restricted Stock Units (RSUs) [Member] Marketable debt securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax [Abstract] Goodwill Goodwill [Table Text Block] Non-U.S. short-term financing obligations Short-Term Bank Loans and Notes Payable Entity Central Index Key Entity Central Index Key Common stock Common Stock, Value, Outstanding Less accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Equity [Abstract] 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] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Provision for restructuring Restructuring Charges Excluding Accelerated Stock-based Compensation Restructuring Charges Excluding Accelerated Stock-based Compensation LEGAL PROCEEDINGS AND CONTINGENCIES Legal Matters and Contingencies [Text Block] BMS Shareholders’ equity: Equity, Attributable to Parent [Abstract] Income Statement [Abstract] Income Statement [Abstract] Percent of ownership stake Disposal Group, Including Discontinued Operation, Ownership Percentage in Disposed Asset Disposal Group, Including Discontinued Operation, Ownership Percentage in Disposed Asset Document Transition Report Document Transition Report Settlements, pretax Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Equity investment (gains)/losses, net (Note 9) Total equity investment (gains)/losses Gain (Loss) on Investments Royalty and licensing income Licensing And Other Arrangements Income Licensing And Other Arrangements Income Designated as cash flow hedges Designated as Hedging Instrument [Member] Restructuring Plan [Domain] Restructuring Plan [Domain] Deferred income taxes Deferred Income Tax Assets, Net Gross to Net Adjustments [Domain] Gross to Net Adjustments [Domain] [Domain] for Gross to Net Adjustments [Axis] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Accelerated depreciation Restructuring and Related Cost, Accelerated Depreciation Payments for asset acquisitions, net of cash acquired Payments to Acquire Productive Assets, Net Of Cash Acquired Payments to Acquire Productive Assets, Net Of Cash Acquired 2.973% Notes due 2030 2.973% Notes due 2030 [Member] 2.973% Notes due 2030 Research and development Research and Development, Noncurrent Research and Development, Noncurrent $5.0 Billion Maximum Borrowing Capacity $5.0 Billion Maximum Borrowing Capacity [Member] $5.0 Billion Maximum Borrowing Capacity City Area Code City Area Code Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Keytruda royalties Keytruda Royalties [Member] Keytruda Royalties All Individuals All Individuals [Member] Market share units Market Share Units [Member] Long-term debt, fair value Debt Instrument, Fair Value Disclosure Collaborative Arrangement Collaborative Arrangement [Member] 3.857% Notes due 2038 3.857% Notes due 2038 [Member] 3.857% Notes due 2038 Dividends Payments of Dividends Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Expected weighted-average period in years of compensation cost to be recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Other Other Accrued Liabilities, Noncurrent Amortization of deferred income Amortization Of Deferred Income Amortization Of Deferred Income 4.289% Notes due 2045 4.289% Notes due 2045 [Member] 4.289% Notes due 2045 Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total Assets Assets Net realized (gains)/losses recognized on investments sold Equity Securities without Readily Determinable Fair Value, Realized Gain (Loss) Equity Securities without Readily Determinable Fair Value, Realized Gain (Loss) Amortization of acquired intangible assets Amortization of Acquired Intangible Assets Amortization of Acquired Intangible Assets Amortization, after tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Less: net (gains)/losses recognized on investments sold Equity Securities, FV-NI, Realized Gain (Loss) Alliances and Collaboration Companies [Domain] Alliances and Collaboration Companies [Domain] Alliances and Collaboration Companies Interest expense Interest Expense, Nonoperating Equity investments without RDFV Equity Securities without Readily Determinable Fair Value, Amount EMPLOYEE STOCK BENEFIT PLANS Share-Based Payment Arrangement [Text Block] Krazati Krazati [Member] Krazati Contingent value rights (Note 9) Contingent Value Rights, Noncurrent Contingent Value Rights, Noncurrent IPRD impairment charge Intangible Asset, Excluding Goodwill, Indefinite-Lived, Impairment Loss Opdivo Qvantig Opdivo Ovantig [Member] Opdivo Ovantig Write-Down Of Oncology Asset Impairment Write-Down Of Oncology Asset Impairment [Member] Write-Down Of Oncology Asset Impairment PEO PEO [Member] Total stock-based compensation expense Share-Based Payment Arrangement, Expense Other non-current liabilities Other non-current liabilities Other Liabilities, Noncurrent Goodwill Balance at December 31, 2025 Balance at June 30, 2026 Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Payment and royalty allocation Payment And Royalty Allocation Payment And Royalty Allocation Weighted-average fair value (in 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 Litigation [Table] Litigation [Table] Retained Earnings Retained Earnings [Member] Operating leases Operating Lease, Liability, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] Capitalized software Software, In-Development, Internally Developed, and Purchased [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Corporate debt securities Corporate Debt Securities [Member] Deferred income – from alliances Deferred Income Diluted (usd per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status 3.20% Notes 3.20% Notes [Member] 3.20% Notes Total return swap contracts Other Contract [Member] Net cash provided by/(used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Interim Period, Costs Not Allocable [Domain] Interim Period, Costs Not Allocable [Domain] Accounts Receivable, after Allowance for Credit Loss [Abstract] Accounts Receivable, after Allowance for Credit Loss [Abstract] Restructuring Charges [Abstract] Restructuring Charges [Abstract] Total Shareholder Return Amount Total Shareholder Return Amount Derivatives qualifying as cash flow hedges, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Other royalties and licensing income Other Royalties and Licensing Income [Member] Other Royalties and Licensing Income Divestiture and other proceeds Divestiture And Other Proceeds This element represents the cash inflow during the period from the sale of a business, asset or other proceeds. Cash Flow Hedging Cash Flow Hedging [Member] Alliances and Collaboration Companies [Axis] Alliances And Collaboration Companies [Axis] Alliances And Collaboration Companies Net unrealized (gains)/losses recognized on investments still held Unrealized Gain (Loss) on Investments Litigation Case [Domain] Litigation Case [Domain] Amortization of intangible assets Intangible Asset, Finite-Lived, Amortization Expense Foreign currency translation Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Other intangible assets Intangible Asset, Finite-Lived [Line Items] Schedule of Provision for Income Taxes Schedule of Provision for Income Taxes [Table Text Block] -- None. No documentation exists for this element. -- Research and development Research and Development Expense Upfront payments to be paid to collaborative partner Upfront Payments To Be Paid To Collaborative Partner Upfront payments made to partner as part of collaborative arrangement. Adjustments to reconcile net earnings/(loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Gross to Net Adjustments [Line Items] Gross to Net Adjustments [Line Items] [Line Items] for Gross to Net Adjustments [Table] Deferred compensation Deferred Compensation Liability, Classified, Noncurrent Share-Based Payment Arrangement [Abstract] Cash Flows From Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property, plant and equipment Property, plant and equipment Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Schedule of Stock by Class Schedule of Stockholders Equity [Table Text Block] Debt securities, available-for-sale, term Debt Securities, Available-for-Sale, Term Financial Instruments [Domain] Financial Instruments [Domain] Schedule of Restructuring Reserve by Type of Cost Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Derivative assets Derivative Asset INVENTORIES Inventory Disclosure [Text Block] Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Winrevair* License Winrevair* License [Member] Winrevair* License GOODWILL AND OTHER INTANGIBLE ASSETS Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Noncontrolling interest Comprehensive income/(loss) attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Total Intangible Asset, Excluding Goodwill, before Accumulated Amortization REVENUE Revenue from Contract with Customer [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Celgene Securities Class Action Celgene Securities Class Action [Member] Celgene Securities Class Action Unamortized basis adjustment from swap terminations Unamortized Basis Adjustment From Swap Terminations This element represents the adjustment to principal value of long term debt related to the unamortized basis adjustment from swap terminations. Foreign currency exchange contracts gains/(losses): Foreign Currency Derivatives [Abstract] Settlements, tax Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax Raw and packaging materials Inventory, Raw Materials and Supplies, Net of Reserves Inventories Increase (Decrease) in Inventories Unrealized (losses)/gains on marketable debt securities, pretax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Licensing and Other Arrangements [Axis] Licensing and Other Arrangements [Axis] Licensing and Other Arrangements Other current assets Other current assets Other Assets, Current Limited partnerships and other investments Limited Partnerships and Other Equity Method Investments [Abstract] Limited Partnerships and Other Equity Method Investments Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Other Nonoperating Income (Expense) [Abstract] Other Nonoperating Income (Expense) [Abstract] All Trading Arrangements All Trading Arrangements [Member] Gain (loss) on derivative, net Derivative, Gain (Loss) on Derivative, Net Restructuring and related cost, expected cost remaining Restructuring and Related Cost, Expected Cost Remaining Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Reclassified to net earnings, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Intangible Asset Name [Domain] Intangible Asset Name [Domain] Intangible Asset Name [Domain] Three Customers Three Customers [Member] Three Customers Current Fiscal Year End Date Current Fiscal Year End Date Gain on divestiture Gain (Loss) on Disposition of Business Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivatives qualifying as cash flow hedges: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Derivative [Line Items] Derivative [Line Items] Expected restructuring and related charges Restructuring and Related Cost, Expected Cost Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends declared (in usd per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Marketable debt securities AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax Stock compensation Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Pomalyst/Imnovid Pomalyst/Imnovid [Member] Pomalyst/Imnovid [Member] Machinery, equipment and fixtures Machinery and Equipment, Gross Distributions and other Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Reclassified to net earnings, pretax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Treasury stock, beginning balance (in shares) Treasury stock, ending balance (in shares) Treasury Stock, Common, Shares Research and development Research and Development, Current Research and Development, Current Royalties Accrued Royalties, Current Marketable debt securities Debt Securities, Available-for-Sale, Current Equity Components [Axis] Equity Components [Axis] Debt repaid, principal Debt Instrument, Repaid, Principal Currency [Axis] Currency [Axis] Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Alliance and other revenues Alliance And Other Revenues [Member] Alliance And Other Revenues Ono Ono [Member] Ono Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income/(loss) attributable to BMS Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unamortized bond discounts and issuance costs Debt Instrument, Unamortized Discount Termination Date Trading Arrangement Termination Date Stock compensation (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] 1.750% Notes due 2035 1.750% Notes due 2035 [Member] One750NotesDue2035Member Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Pension and postretirement benefits Pension and postretirement benefits, after tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other current liabilities Other Liabilities, Current Sino-American Shanghai Squibb Pharmaceuticals Limited Sino-American Shanghai Squibb Pharmaceuticals Limited [Member] Sino-American Shanghai Squibb Pharmaceuticals Limited Schedule of Equity Investments Schedule of Equity Investments [Table Text Block] Schedule of Equity Investments Other non-current assets Other non-current assets Other Assets, Noncurrent Document Type Document Type Acquisition and other payments, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Foreign currency translation, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax 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] Fair Value as of Grant Date Award Grant Date Fair Value Legal Proceedings and Contingencies [Line Items] Legal Proceedings And Contingencies [Line Items] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Foreign currency translation Foreign currency translation, after tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Arrangement Duration Trading Arrangement Duration Local Phone Number Local Phone Number SUPPLEMENTAL FINANCIAL INFORMATION Additional Financial Information Disclosure [Text Block] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name BASIS OF PRESENTATION AND RECENTLY ISSUED ACCOUNTING STANDARDS Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Stock option proceeds and other, net Payments For (Proceeds From) Stock Option Exercises And Other Adjustments Payments For (Proceeds From) Stock Option Exercises And Other Adjustments Net Investment Hedging Net Investment Hedging [Member] Earnings/(Loss) before income taxes Earnings/(Loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Amortization, tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Commitments and Contingencies (see Note 18) Commitments and Contingencies Gross carrying amounts Intangible Asset, Finite-Lived, before Accumulated Amortization Less charge-backs and cash discounts Cash Discounts The amount of reductions to trade receivables incurred during the period attributable to cash discounts. Other Noncurrent Liabilities Other Noncurrent Liabilities [Table Text Block] Total Revenues Total alliance revenues Revenues Gross property, plant and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equity in net (income)/loss of affiliates and other adjustments Income (Loss) from Equity Method Investments Royalty and licensing income (Note 4) Other Income Received From Alliance Partners This element represents the amount of other income received during the period related to alliance partners and includes the amortization of milestone payments received and royalty income. Equity investment (gains)/losses, net Equity Method Investment, Realized Gain (Loss) on Disposal Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Other comprehensive income, tax Other Comprehensive Income (Loss), Tax Goodwill [Roll Forward] Goodwill [Roll Forward] Counterparty Name [Axis] Counterparty Name [Axis] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] 2023 Restructuring Plan 2023 Restructuring Plan [Member] 2023 Restructuring Plan Acquired IPRD Payments to Acquire in Process Research and Development Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Inventories Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Level 3 Fair Value, Inputs, Level 3 [Member] Reclassified to net earnings, after tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Schedule of Research and Development Expense [Line Items] Schedule of Research and Development Expense [Line Items] Schedule of Research and Development Expense Opdivo Opdivo [Member] PEO Name PEO Name Other Research and Development Expense, Other [Member] Research and Development Expense, Other Geographical [Axis] Geographical [Axis] Commercial Paper Program Commercial Paper Program [Member] Commercial Paper Program Legacy Portfolio Legacy Brands [Member] Legacy Brands Opdualag Opdualag [Member] Opdualag Diabetes business - royalties Diabetes Business [Member] Diabetes business [Member] Net product sales Net Product Sales [Member] Net product sales [Member] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Foreign currency translation, pretax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Entity Tax Identification Number Entity Tax Identification Number Recognized in other comprehensive income/(loss), after tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Selected Financial Information For Alliances Collaborative Arrangement and Arrangement Other than Collaborative [Table Text Block] Number of oncology assets Number Of Oncology Assets Number Of Oncology Assets Marketable debt securities Debt Securities, Available-for-Sale, Noncurrent Income tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Write-Down Of Oncology Asset And Radiopharmaceutical Asset Impairment Write-Down Of Oncology Asset And Radiopharmaceutical Asset Impairment [Member] Write-Down Of Oncology Asset And Radiopharmaceutical Asset Impairment Cumulative impairment amount Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount Payments Payments for Restructuring Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Alliance Statement [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Accounts payable Increase (Decrease) in Accounts Payable Other Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] 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] Comprehensive income/(loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Mature products and other Mature Brands and Other [Member] Mature Brands and Other Sprycel Sprycel [Member] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Land Land Bristol-Myers Squibb Bristol-Myers Squibb [Member] Bristol-Myers Squibb Disposal Group Name [Axis] Disposal Group Name [Axis] Customer [Domain] Customer [Domain] Inventories Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Schedule of Derivatives and Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic (usd per share) Earnings Per Share, Basic Total Current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Table Text Block] Long-term debt Long-Term Debt, Excluding Current Maturities Award Type [Axis] Award Type [Axis] Recognized in Other comprehensive income/(loss) Recognized in other comprehensive income/(loss), pretax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Forward interest rate contracts Interest Rate Contract [Member] 2seventy bio 2seventy bio [Member] 2seventy bio Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Net trade receivables Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Short-term Debt Schedule of Short-Term Debt [Table Text Block] Other Other Income Expense The net amount of other (income)/expense which does not qualify for separate disclosure under materiality guidelines. Product and Service [Axis] Product and Service [Axis] Currency [Domain] All Currencies [Domain] Contingent consideration fair value adjustments Contingent consideration 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] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Divestiture (Gains)/Losses Divestiture (gains)/losses (Note 4) Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Marketable debt securities Debt Securities, Available-for-Sale Contingent value rights Business Combination, Contingent Consideration, Liability Japan, Yen Japan, Yen Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] International Non-US [Member] Equity investments with RDFV Equity Securities, FV-NI [Abstract] Schedule of Research and Development Research and Development [Table Text Block] Research and Development Upward adjustments Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount Derivative Contract [Domain] Derivative Contract [Domain] Total equity investments Equity Investments Equity Investments Equity Awards Adjustments Equity Awards Adjustments [Member] ALLIANCES Collaborative Arrangement Disclosure [Text Block] Hedging Relationship [Domain] Hedging Relationship [Domain] Total Liabilities and Equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Short-term debt obligations Debt, Current Noncontrolling interest Equity, Attributable to Noncontrolling Interest Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Provision for restructuring (Note 6) Provision for restructuring Restructuring Charges Orencia Orencia [Member] Schedule of Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Tabular List, Table Tabular List [Table Text Block] Capital in excess of par value of stock Additional Paid in Capital Share-based Payment Arrangement, Cost by Plan Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Other (income)/expense, net Other (income)/expense, net Other Nonoperating Income (Expense) Name Awards Close in Time to MNPI Disclosures, Individual Name EQUITY Equity, Including Portion Attributable to Noncontrolling Interest [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] Debt Securities, Trading, and Equity Securities, FV-NI Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] BioNTech BioNTech [Member] BioNTech Alliance revenues Alliance Revenues [Member] Alliance Revenues Business Combination, Contingent Consideration, Type [Domain] Business Combination, Contingent Consideration, Type [Domain] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Eliquis Eliquis [Member] Receivables Receivables – from alliance partners Receivables Receivables, Net, Current Cross-currency swap contracts Cross Currency Swap Contracts [Member] Cross Currency Swap Contracts Preferred stock Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Income taxes Prepaid Taxes Interest payments Interest Paid, Excluding Capitalized Interest, Operating Activity Payments to acquire assets Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Foreign currency exchange contracts Foreign Exchange Forward [Member] Hedging Designation [Axis] Hedging Designation [Axis] IPRD In Process Research and Development [Member] Deferred income Deferred Income, Noncurrent Credit Facility [Axis] Credit Facility [Axis] RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount License and other arrangements anniversary payments License and Other Arrangements Anniversary Payments License and Other Arrangements Anniversary Payments Name Measure Name Priority Review Voucher Priority Review Voucher [Member] Priority Review Voucher INCOME TAXES Income Tax Disclosure [Text Block] $5 Billion Maximum Borrowing Capacity $5 Billion Maximum Borrowing Capacity [Member] $5 Billion Maximum Borrowing Capacity Accounts payable Accounts payable – to alliance partners Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other adjustments Other Noncash Income (Expense) Reblozyl Reblozyl [Member] Reblozyl [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Proceeds from sales of equity investments Proceeds from Sale of Equity Securities, FV-NI Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Derivatives qualifying as cash flow hedges, pretax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Capital in Excess of Par Value of Stock Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Non-U.S. receivables sold on a nonrecourse basis Receivables Sold On Nonrecourse Basis The amount of receivables sold on a nonrecourse basis during the year. Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Merck Merck [Member] Merck Schedule of Share-based Compensation Additional Information Schedule Of Share Based Compensation Additional Information [Table Text Block] Tabular disclosure of the total intrinsic value of options exercised (or share units converted), total fair value of shares vested during the year and the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. Accrued liabilities for CERCLA matters Accrued Liabilities Name Trading Arrangement, Individual Name Abraxane Abraxane [Member] Abraxane [Member] Cash and cash equivalents Cash and Cash Equivalent Charge-backs and cash discounts Charge-backs and cash discounts [Member] Charge-backs and cash discounts [Member] Zeposia Zeposia [Member] Zeposia Foreign currency translation and other Restructuring Reserve, Foreign Currency Translation Gain (Loss) Company Selected Measure Amount Company Selected Measure Amount 1.000% Notes due 2025 1.000% Notes due 2025 [Member] One000NotesDue2025Member Not designated as hedges Not Designated as Hedging Instrument [Member] Net (gains)/losses recognized Equity Securities, FV-NI, Unrealized Gain (Loss) Depreciation and amortization, net Depreciation, Depletion and Amortization Total inventories Inventory, Gross Net earnings/(loss) Net earnings/(loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Growth Portfolio Growth Brands [Member] Growth Brands Current assets: Assets, Current [Abstract] Derivative liabilities Fair value of interest rate swap contracts Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Amortization, pretax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Entity Address, Address Line One Entity Address, Address Line One Income tax provision Income Tax Expense (Benefit) Fair Value Hedging Fair Value Hedging [Member] OTHER (INCOME)/EXPENSE, NET Other Income and Other Expense Disclosure [Text Block] Customer Concentration Risk Customer Concentration Risk [Member] Cost of products sold Cost of Product and Service Sold R&D technology Technology-Based Intangible Assets [Member] Award Timing Method Award Timing Method [Text Block] Basis of Consolidation Consolidation, Policy [Policy Text Block] Increase/(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 Forecast Forecast [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Actuarial gains/(losses), pretax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Consideration for anniversary payments Consideration For Anniversary Payments Consideration For Anniversary Payments Net earnings/(loss) attributable to BMS Net earnings/(loss) attributable to BMS Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Unamortized purchase price adjustments of Celgene debt Debt Instrument, Unamortized Premium Certificates of deposit Certificates of Deposit [Member] Contingent milestone income Contingent Regulatory Milestone Income Contingent Regulatory Milestone Income Investment income Investment Income, Interest Receivables Increase (Decrease) in Receivables Other Other Region [Member] Research and development Research and Development Expense, Collaborative Arrangement Research and Development Expense - Collaborative Arrangement. The balance can be debit/credit based on the nature of the arrangement. Recognized in Other comprehensive income/(loss) Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax Long-term debt, term (in years) Long-Term Debt, Term Hengrui License Agreements Hengrui License Agreements [Member] Hengrui License Agreements Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]