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Commitments and Contingent Liabilities - Narrative (Details) $ in Millions | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2023 USD ($) | Jun. 30, 2023 USD ($) distributor case state jurisdiction | Mar. 31, 2023 USD ($) | Sep. 30, 2022 USD ($) | Jul. 31, 2020 state | Dec. 12, 2018 officer
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of former officers | officer |  |  |  |  |  | 2
National Prescription Opioid Litigation | United States |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Complaints filed against the entity | case |  | 400 |  |  |  |
National Prescription Opioid Litigation | Canada |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Complaints filed against the entity | case |  | 4 |  |  |  |
National Prescription Opioid Litigation | An individual | Canada |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Complaints filed against the entity | case |  | 1 |  |  |  |
Settled Litigation | National Prescription Opioid Litigation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Settlement payment |  | $ 0 |  |  |  |
Settled Litigation | National Prescription Opioid Litigation | Subsequent Event |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Settlement payment | $ 529 |  |  |  |  |
National Prescription Opioid Litigation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of other national distributors named in suit | distributor |  | 2 |  |  |  |
Number of states in which court cases are pending | state |  | 48 |  |  |  |
Loss contingency, number of cases dismissed | case |  | 2,300 |  |  |  |
Portion of settlement award to be used by state and local government for remediation (percent) |  | 85.00% |  |  |  |
Loss contingency, claims settled, number of jurisdictions not participating in settlement | jurisdiction |  | 1 |  |  |  |
National Prescription Opioid Litigation | State of Alabama and Subdivisions |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Settlement payment |  | $ 42 |  |  |  |
Award payable under proposed framework |  | $ 132 |  |  |  |
National Prescription Opioid Litigation | Native American Tribes Other Than Cherokee Nation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Litigation settlement, amount awarded to other party, percentage of total settlement to be used to remediate damages |  | 0.85 |  |  |  |
National Prescription Opioid Litigation | Three Largest U.S. Pharmaceutical Distributors |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Settlement payment |  | $ 1,000 |  |  |  |
Award payable under proposed framework |  | 6,800 |  |  |  |
National Prescription Opioid Litigation | Three National Pharmaceutical Distributors | State of West Virginia and Subdivisions |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Settlement payment |  | 38 |  |  |  |
Award payable under proposed framework |  | 114 |  |  |  |
National Prescription Opioid Litigation | Three National Pharmaceutical Distributors | Cherokee Nation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Settlement payment |  | 56 |  |  |  |
National Prescription Opioid Litigation | Three National Pharmaceutical Distributors | Native American Tribes Other Than Cherokee Nation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Award payable under proposed framework |  | $ 140 |  |  |  |
Evanston Police Pension Fund v. McKesson Corporation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss contingency, estimate of possible loss |  |  | $ 141 | $ 141 |  |
Probable loss recovery |  |  | $ 141 | $ 141 |  |
United States Ex Rel. Hart V. McKesson Corporation, Et Al 15-CV-00903-RA |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of states filed on behalf of | state |  |  |  |  | 27 |

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