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CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Additional Paid-in Capital | Other Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury | Noncontrolling Interests
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance, common stock (in shares) at Mar. 31, 2015 |  | 384 |  |  |  |  |  |
Beginning balance at Mar. 31, 2015 | $ 8,085 | $ 4 | $ 6,968 | $ (7) | $ 12,705 | $ (1,713) | $ (9,956) | $ 84
Beginning balance, treasury common stock (shares) at Mar. 31, 2015 |  |  |  |  |  |  | (152) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under employee plans (in shares) |  | 3 |  |  |  |  | 1 |
Issuance of shares under employee plans | 14 |  | 123 |  |  |  | $ (109) |
Share-based compensation | 130 |  | 130 |  |  |  |  |
Tax benefit related to issuance of shares under employee plans | 117 |  | 117 |  |  |  |  |
Other comprehensive income (loss) | 152 |  |  |  |  | 152 |  |
Net income | 2,266 |  |  |  | 2,258 |  |  | 8
Repurchase of common stock (in shares) |  |  |  |  |  |  | (9) |
Repurchase of common stock | (1,504) |  |  |  |  |  | $ (1,504) |
Retirement of common stock (in shares) |  | 116 |  |  |  |  | 116 |
Retirement of common stock |  | $ (1) | (1,493) |  | (6,354) |  | $ 7,848 |
Cash dividends declared | (249) |  |  |  | (249) |  |  |
Other | (3) |  |  | 5 |  |  |  | (8)
Ending balance common stock (in shares) at Mar. 31, 2016 |  | 271 |  |  |  |  |  |
Ending balance at Mar. 31, 2016 | 9,008 | $ 3 | 5,845 | (2) | 8,360 | (1,561) | $ (3,721) | 84
Ending balance, treasury common stock (shares) at Mar. 31, 2016 |  |  |  |  |  |  | (46) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under employee plans (in shares) |  | 3 |  |  |  |  |  |
Issuance of shares under employee plans | 64 |  | 125 |  |  |  | $ (61) |
Share-based compensation | 110 |  | 110 |  |  |  |  |
Tax benefit related to issuance of shares under employee plans | 7 |  |  |  | 7 |  |  |
Acquisition of Vantage | 89 |  |  |  |  |  |  | 89
Other comprehensive income (loss) | (580) |  |  |  |  | (580) |  |
Net income | 5,109 |  |  |  | 5,070 |  |  | 39
Repurchase of common stock (in shares) |  |  |  |  |  |  | (16) |
Repurchase of common stock | (2,250) |  | (50) |  |  |  | $ (2,200) |
Cash dividends declared | (249) |  |  |  | (249) |  |  |
Other (in shares) |  | (1) |  |  |  |  |  |
Other | (35) |  | (2) | 0 | 1 |  |  | (34)
Ending balance common stock (in shares) at Mar. 31, 2017 |  | 273 |  |  |  |  |  |
Ending balance at Mar. 31, 2017 | $ 11,273 | $ 3 | 6,028 | (2) | 13,189 | (2,141) | $ (5,982) | 178
Ending balance, treasury common stock (shares) at Mar. 31, 2017 | (62) |  |  |  |  |  | (62) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under employee plans (in shares) |  | 2 |  |  |  |  |  |
Issuance of shares under employee plans | $ 67 |  | 126 |  |  |  | $ (59) |
Share-based compensation | 67 |  | $ 67 |  |  |  |  |
Payments to noncontrolling interests | (98) |  |  |  |  |  |  | (98)
Other comprehensive income (loss) | 424 |  |  |  |  | 424 |  |
Net income | 254 |  |  |  | 67 |  |  | 187
Repurchase of common stock (in shares) |  |  | (36) |  |  |  | (11) |
Repurchase of common stock | (1,650) |  |  |  |  |  | $ (1,614) |
Exercise of put right by noncontrolling shareholders of McKesson Europe | 3 |  | $ 3 |  |  |  |  |
Cash dividends declared | (270) |  |  |  | (270) |  |  |
Other (in shares) |  |  |  |  |  |  |  |
Other | (13) |  |  | 1 |  |  |  | (14)
Ending balance common stock (in shares) at Mar. 31, 2018 |  | 275 |  |  |  |  |  |
Ending balance at Mar. 31, 2018 | $ 10,057 | $ 3 | $ 6,188 | $ (1) | $ 12,986 | $ (1,717) | $ (7,655) | $ 253
Ending balance, treasury common stock (shares) at Mar. 31, 2018 | (73) |  |  |  |  |  | (73) |

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