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Redeemable Noncontrolling Interests and Noncontrolling Interests - Narrative (Details) shares in Millions, $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) shares | Dec. 31, 2014 € / shares
Noncontrolling Interest [Line Items] |  |  |
Put right redemption price per share (in euros per share) | € / shares |  |  | € 22.99
Put right value, interest rate spread (as a percent) |  |  | 5.00%
Payments for purchase shares of McKesson Europe | $ 0 | $ 1,031 |
Associated increase in Company's ownership interest on its equity |  | 8 |
Reclassification of temporary equity to noncontrolling interest |  | (287) |
Net income attributable to noncontrolling interests | 41 | 47 |
Redeemable Noncontrolling Interest |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interests |  | 8 |
Decrease in noncontrolling interest |  | 983 |
Reclassification of temporary equity to noncontrolling interest |  | 287 |
Additional Paid-in Capital |  |  |
Noncontrolling Interest [Line Items] |  |  |
Associated increase in Company's ownership interest on its equity |  | 178 |
Noncontrolling Interests |  |  |
Noncontrolling Interest [Line Items] |  |  |
Decrease in noncontrolling interest |  | 0 |
Reclassification of temporary equity to noncontrolling interest |  | (287) |
Net income attributable to noncontrolling interests | 41 | 39 |
McKesson Europe Subsidiary |  |  |
Noncontrolling Interest [Line Items] |  |  |
Annual recurring dividend (in euro per share) | € / shares |  |  | € 0.83
McKesson Europe Subsidiary |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interests |  | 8 |
Payments for purchase shares of McKesson Europe |  | $ 1,000 |
Shares purchased (in shares) | shares |  | 34.5 |
Vantage and ClarusOne Sourcing Services LLC |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interests | $ 41 | $ 39 |

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