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v3.20.4

Redeemable Noncontrolling Interests and Noncontrolling Interests - Narrative (Details) shares in Millions | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 31, 2020 € / shares | Sep. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Mar. 31, 2019 USD ($)
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% |  | 5.00% |  |  |  |  |  |
Decrease in carrying value of non-controlling interest | $ 41,000,000 | $ 39,000,000 | $ 134,000,000 | $ 115,000,000 |  |  |  |  |
Associated increase in Company's ownership interest on its equity |  |  | 3,000,000 |  |  |  |  |  |
Carrying value of redeemable noncontrolling interests | 1,292,000,000 |  | 1,292,000,000 |  |  |  | $ 1,402,000,000 |  |
Noncontrolling interests | 200,000,000 |  | 200,000,000 |  |  |  | 217,000,000 |  |
Net income attributable to noncontrolling interests | 52,000,000 | 56,000,000 | 152,000,000 | 163,000,000 |  |  |  |  |
Redeemable Noncontrolling Interest |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Net income attributable to noncontrolling interests | 11,000,000 | 11,000,000 | 32,000,000 | 33,000,000 |  |  |  |  |
Decrease in carrying value of non-controlling interest | 0 | 0 | 0 | 0 |  |  |  |  |
Decrease in noncontrolling interest |  |  | 49,000,000 |  |  |  |  |  |
Carrying value of redeemable noncontrolling interests | 1,292,000,000 | 1,397,000,000 | 1,292,000,000 | 1,397,000,000 |  | $ 1,265,000,000 | 1,402,000,000 | $ 1,384,000,000 | $ 1,393,000,000
Additional Paid-in Capital |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Associated increase in Company's ownership interest on its equity |  |  | 3,000,000 |  |  |  |  |  |
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 | 11,000,000 | 11,000,000 | 32,000,000 | 33,000,000 |  |  |  |  |
Payments for purchase shares of Mckesson Europe |  |  | $ 49,000,000 |  |  |  |  |  |
Shares purchased (shares) | shares |  |  | 1.8 |  |  |  |  |  |
Carrying value of redeemable noncontrolling interests | 1,300,000,000 |  | $ 1,300,000,000 |  |  |  | 1,400,000,000 |  |
Maximum redemption value of redeemable noncontrolling interest | $ 1,300,000,000 |  | $ 1,300,000,000 |  |  |  | $ 1,200,000,000 |  |
Ownership percentage (as a percent) | 78.00% |  | 78.00% |  |  |  | 77.00% |  |
Vantage and ClarusOne Sourcing Services LLC |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Noncontrolling interests | $ 200,000,000 |  | $ 200,000,000 |  |  |  | $ 217,000,000 |  |
Net income attributable to noncontrolling interests | $ 41,000,000 | $ 45,000,000 | $ 120,000,000 | $ 130,000,000 |  |  |  |  |

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