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Commitments, Contingent Liabilities and Litigation Narrative (Details) $ in Millions |  | 3 Months Ended | 5 Months Ended | 12 Months Ended | 52 Months Ended | 152 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2023 USD ($) lawsuit | Sep. 30, 2025 USD ($) states numberOfUSTerritories Rate | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Jun. 30, 2025 USD ($) | Oct. 30, 2025 USD ($) | Jun. 30, 2038 USD ($) | Oct. 29, 2025 lawsuit | Oct. 31, 2022 USD ($) | Jul. 31, 2022 USD ($) | Jun. 30, 2022 states | Apr. 30, 2018 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) from Litigation Settlement |  | $ 0 | $ 40 |  |  |  |  |  |  |  |  |
Income from Settlements of Class Action Lawsuits |  |  | 43 |  |  |  |  |  |  |  |  |
Product Liability Lawsuits [Member] | IVC April 2023 Agreement |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Claims Settled, Number | lawsuit | 4,375 |  |  |  |  |  |  |  |  |  |  |
Product Liability Lawsuits [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency Accrual |  | 40 |  |  |  |  |  |  |  |  |  |
Total Opioid Litigation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
litigation settlement liability recorded |  | 4,300 |  |  |  |  |  |  |  |  |  |
Estimated Litigation Liability, Current |  | $ 486 |  |  |  |  |  |  |  |  |  |
Opioid Lawsuits [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Settling States | states |  | 50 |  |  |  |  |  |  |  |  | 48 |
Settling U.S Territories | numberOfUSTerritories |  | 5 |  |  |  |  |  |  |  |  |  |
Percentage Settling Subdivisions [Line Items] | Rate |  | 99.00% |  |  |  |  |  |  |  |  |  |
Payments for Legal Settlements |  | $ 403 | $ 798 |  |  |  |  |  |  |  |  |
Insurance Recoveries |  | 5 |  |  | $ 25 |  |  |  |  |  |  |
Insurance Recoveries - Pharma |  | 12 |  |  |  |  |  |  |  |  |  |
Opioid Lawsuits [Member] | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments for Legal Settlements |  |  |  |  |  | $ 2,200 | $ 4,100 |  |  |  |  |
Opioid Lawsuits [Member] | WEST VIRGINIA |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss |  |  |  |  |  |  |  |  |  | $ 124 |  |
Opioid Lawsuits [Member] | 921150 American Indian and Alaska Native Tribal Governments |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss |  |  |  |  |  |  |  |  | $ 136 |  |  |
Opioid Lawsuits [Member] | Private Parties [Member] | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Lawsuits, Number | lawsuit |  |  |  |  |  |  |  | 195 |  |  |  |
Opioid Lawsuits [Member] | Class Action Lawsuits [Member] | Private Parties [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss |  | $ 213 |  |  |  |  |  |  |  |  |  |
Opioid Lawsuits [Member] | Class Action Lawsuits [Member] | Private Parties [Member] | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Lawsuits, Number | lawsuit |  |  |  |  |  |  |  | 51 |  |  |  |
Product Liability Lawsuits [Member] | IVC April 2023 Agreement |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | $ 275 |  |  |  |  |  |  |  |  |  |  |
Loss Contingency Accrual, Payments |  |  |  | $ 37 |  |  |  |  |  |  |  |
New York Opioid Stewardship Act [Member] |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Annual Assessment |  |  |  |  |  |  |  |  |  |  |  | $ 100
CVS Health |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term Purchase Commitment, Period |  | 10 years |  |  |  |  |  |  |  |  |  |

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