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CONDENSED 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 (shares) at Mar. 31, 2018 |  | 275 |  |  |  |  |  |
Beginning balance (shares) at Mar. 31, 2018 |  |  |  |  |  |  | (73) |
Beginning balance at Mar. 31, 2018 | $ 10,057 | $ 3 | $ 6,188 | $ (1) | $ 12,986 | $ (1,717) | $ (7,655) | $ 253
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under employee plans (shares) |  | 1 |  |  |  |  |  |
Issuance of shares under employee plans | 35 |  | 46 |  |  |  | $ (11) |
Share-based compensation | 71 |  | 71 |  |  |  |  |
Payments to noncontrolling interests | (143) |  |  |  |  |  |  | (143)
Other comprehensive income (loss) | (109) |  |  |  |  | (109) |  |
Net income (loss) | 965 |  |  |  | 830 |  |  | 135
Repurchase of common stock (shares) |  |  |  |  |  |  | (10) |
Repurchase of common stock | (1,377) |  | 85 |  |  |  | $ (1,462) |
Retirement of common stock (shares) |  | (5) |  |  |  |  | 4 |
Retirement of common stock | (1) |  | (70) |  | (472) |  | $ 541 |
Cash dividends declared | (222) |  |  |  | (222) |  |  |
Other | (41) |  | 1 | (1) |  |  |  | (41)
Ending balance (shares) at Dec. 31, 2018 |  | 271 |  |  |  |  |  |
Ending balance (shares) at Dec. 31, 2018 |  |  |  |  |  |  | (79) |
Ending balance at Dec. 31, 2018 | 9,389 | $ 3 | 6,321 | (2) | 13,276 | (1,826) | $ (8,587) | 204
Beginning balance (shares) at Sep. 30, 2018 |  | 275 |  |  |  |  |  |
Beginning balance (shares) at Sep. 30, 2018 |  |  |  |  |  |  | (80) |
Beginning balance at Sep. 30, 2018 | 9,534 | $ 3 | 6,411 | (2) | 13,354 | (1,762) | $ (8,678) | 208
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under employee plans (shares) |  | 1 |  |  |  |  |  |
Issuance of shares under employee plans | 8 |  | 8 |  |  |  | $ 0 |
Share-based compensation | 22 |  | 22 |  |  |  |  |
Payments to noncontrolling interests | (37) |  |  |  |  |  |  | (37)
Other comprehensive income (loss) | (64) |  |  |  |  | (64) |  |
Net income (loss) | 515 |  |  |  | 469 |  |  | 46
Repurchase of common stock (shares) |  |  |  |  |  |  | (3) |
Repurchase of common stock | (500) |  | (50) |  |  |  | $ (450) |
Retirement of common stock (shares) |  | (5) |  |  |  |  | 4 |
Retirement of common stock | (1) |  | (70) |  | (472) |  | $ 541 |
Cash dividends declared | (75) |  |  |  | (75) |  |  |
Other | (13) |  |  |  |  |  |  | (13)
Ending balance (shares) at Dec. 31, 2018 |  | 271 |  |  |  |  |  |
Ending balance (shares) at Dec. 31, 2018 |  |  |  |  |  |  | (79) |
Ending balance at Dec. 31, 2018 | $ 9,389 | $ 3 | 6,321 | (2) | 13,276 | (1,826) | $ (8,587) | 204
Beginning balance (shares) at Mar. 31, 2019 |  | 271 |  |  |  |  |  |
Beginning balance (shares) at Mar. 31, 2019 | (81) |  |  |  |  |  | (81) |
Beginning balance at Mar. 31, 2019 | $ 8,287 | $ 3 | 6,435 | (2) | 12,409 | (1,849) | $ (8,902) | 193
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under employee plans (shares) |  | 1 |  |  |  |  |  |
Issuance of shares under employee plans | 72 |  | 89 |  |  |  | $ (17) |
Share-based compensation | 90 |  | 90 |  |  |  |  |
Payments to noncontrolling interests | (115) |  |  |  |  |  |  | (115)
Other comprehensive income (loss) | 186 |  |  |  |  | 186 |  |
Net income (loss) | 9 |  |  |  | (121) |  |  | 130
Repurchase of common stock (shares) |  |  |  |  |  |  | (14) |
Repurchase of common stock | (1,934) |  |  |  |  |  | $ (1,934) |
Cash dividends declared | (221) |  |  |  | (221) |  |  |
Other | $ 0 |  |  |  | (3) |  |  | 3
Ending balance (shares) at Dec. 31, 2019 |  | 272 |  |  |  |  |  |
Ending balance (shares) at Dec. 31, 2019 | (95) |  |  |  |  |  | (95) |
Ending balance at Dec. 31, 2019 | $ 6,385 | $ 3 | 6,614 | (2) | 12,075 | (1,663) | $ (10,853) | 211
Beginning balance (shares) at Sep. 30, 2019 |  | 272 |  |  |  |  |  |
Beginning balance (shares) at Sep. 30, 2019 |  |  |  |  |  |  | (92) |
Beginning balance at Sep. 30, 2019 | 6,692 | $ 3 | 6,573 | (2) | 11,965 | (1,704) | $ (10,353) | 210
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under employee plans | 11 |  | 11 |  |  |  |  |
Share-based compensation | 30 |  | 30 |  |  |  |  |
Payments to noncontrolling interests | (39) |  |  |  |  |  |  | (39)
Other comprehensive income (loss) | 41 |  |  |  |  | 41 |  |
Net income (loss) | 231 |  |  |  | 186 |  |  | 45
Repurchase of common stock (shares) |  |  |  |  |  |  | (3) |
Repurchase of common stock | (500) |  |  |  |  |  | $ (500) |
Cash dividends declared | (73) |  |  |  | (73) |  |  |
Other | $ (8) |  |  |  | (3) |  |  | (5)
Ending balance (shares) at Dec. 31, 2019 |  | 272 |  |  |  |  |  |
Ending balance (shares) at Dec. 31, 2019 | (95) |  |  |  |  |  | (95) |
Ending balance at Dec. 31, 2019 | $ 6,385 | $ 3 | $ 6,614 | $ (2) | $ 12,075 | $ (1,663) | $ (10,853) | $ 211

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