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v3.23.1

Stockholders' Equity (Deficit) - Schedule of Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  | $ (1,792) | $ 175 | $ 5,309
Other comprehensive income, net of tax |  | 673 | 115 | 170
Other comprehensive income (loss) attributable to McKesson |  | 673 | 112 | 223
Exercise of put right by noncontrolling shareholders of McKesson Europe AG |  |  | 8 | 3
Ending balance | $ (1,490) | (1,490) | (1,792) | 175
Reclassification to income statement, tax expense | 6 |  |  |
Net Investment Hedging | Derivatives designated for hedge accounting: | Euro Denominated Notes |  |  |  |
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Derivatives designated as net investment hedges: |  | 7 | 73 | (118)
Currency Swap | Derivatives designated for hedge accounting: |  |  |  |
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Derivatives designated as net investment hedges: |  | 28 | (4) | (119)
Derivatives used in net investment hedges, gains (losses) |  | 28 | (4) | (119)
Total Accumulated Other Comprehensive Loss |  |  |  |
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  | (1,534) | (1,480) | (1,703)
Other comprehensive income (loss) before reclassifications |  | (179) | 39 | 99
Amount reclassified to earnings and other |  | 852 | 76 | 71
Other comprehensive income, net of tax |  | 673 | 115 | 170
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests |  | 44 | (1) | (53)
Other comprehensive income (loss) attributable to McKesson |  | 629 | 116 | 223
Exercise of put right by noncontrolling shareholders of McKesson Europe AG |  | (170) |  |
Ending balance | (905) | (905) | (1,534) | (1,480)
Foreign Currency Translation Adjustments, Net of Tax |  |  |  |
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  | (1,504) | (1,361) | (1,780)
Other comprehensive income (loss) before reclassifications |  | (329) | (51) | 312
Amount reclassified to earnings and other |  | 1,027 | 71 | 47
Other comprehensive income, net of tax |  | 698 | 20 | 359
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests |  | 41 | 5 | (60)
Other comprehensive income (loss) attributable to McKesson |  | 657 | 15 | 419
Exercise of put right by noncontrolling shareholders of McKesson Europe AG |  | (158) |  |
Ending balance | (847) | (847) | (1,504) | (1,361)
Unrealized Gains (Losses) on Net Investment Hedges, Net of Tax |  |  |  |
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  | 10 | (36) | 138
Other comprehensive income (loss) before reclassifications |  | 112 | 41 | (175)
Amount reclassified to earnings and other |  | (136) | (1) | 0
Other comprehensive income, net of tax |  | (24) | 40 | (175)
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests |  | 0 | (6) | (1)
Other comprehensive income (loss) attributable to McKesson |  | (24) | 46 | (174)
Exercise of put right by noncontrolling shareholders of McKesson Europe AG |  | 0 |  |
Ending balance | (14) | (14) | 10 | (36)
Unrealized gain (loss) on net investment hedges, tax |  | (33) | (23) | 62
Unrealized Gains (Losses) on Cash Flow and Other Hedges, Net of Tax |  |  |  |
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  | 27 | 13 | 49
Other comprehensive income (loss) before reclassifications |  | 10 | 18 | (36)
Amount reclassified to earnings and other |  | (73) | (4) | 0
Other comprehensive income, net of tax |  | (63) | 14 | (36)
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests |  | 0 | 0 | 0
Other comprehensive income (loss) attributable to McKesson |  | (63) | 14 | (36)
Exercise of put right by noncontrolling shareholders of McKesson Europe AG |  | 0 |  |
Ending balance | (36) | (36) | 27 | 13
Unrealized Gains (Losses) and Other Components of Benefit Plans, Net of Tax |  |  |  |
Accumulated Other Comprehensive Income (Loss), Change, Net of Tax [Roll Forward] |  |  |  |
Beginning balance |  | (67) | (96) | (110)
Other comprehensive income (loss) before reclassifications |  | 28 | 31 | (2)
Amount reclassified to earnings and other |  | 34 | 10 | 24
Other comprehensive income, net of tax |  | 62 | 41 | 22
Less: amounts attributable to noncontrolling and redeemable noncontrolling interests |  | 3 | 0 | 8
Other comprehensive income (loss) attributable to McKesson |  | 59 | 41 | 14
Exercise of put right by noncontrolling shareholders of McKesson Europe AG |  | (12) |  |
Ending balance | $ (8) | $ (8) | $ (67) | $ (96)

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