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Consolidated Statements of Changes in Equity and Redeemable Non-Controlling Interest - USD ($) $ in Millions | Total | Common Stock | Treasury Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Non- Controlling Interest in Consolidated Subsidiaries
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2016 |  | 596,000,000 | (1,000,000) |  |  |  |
Beginning balance at Dec. 31, 2016 | $ 15,775 | $ 6 | $ (40) | $ 11,306 | $ 4,810 | $ (344) | $ 37
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Other comprehensive income | $ 121 |  |  |  |  | 121 |
Exercise of common stock options (in shares) | 597,000 |  |  |  |  |  |
Exercise of common stock options | $ 17 |  |  | 17 |  |  |
Repurchases of common stock (in shares) | (14,967,000) |  | (15,000,000) |  |  |  |
Repurchases of common stock | $ (949) |  | $ (949) |  |  |  |
Payments relating to treasury shares (in shares) | (1,500,000) |  | (1,000,000) |  |  |  |
Payments relating to treasury shares | $ (88) |  | $ (88) |  |  |  |
Stock-based compensation | 152 |  |  | 152 |  |  |
Issuance of restricted stock (in shares) |  | 4,000,000 |  |  |  |  |
Issuance of restricted stock | 0 |  | $ 1 | (1) |  |  |
Acquisition of non-controlling interest | (92) |  |  | (82) |  |  | (10)
Distributions of profits | (26) |  |  |  |  |  | (26)
Dividends paid to stockholders | (476) |  |  |  | (476) |  |
Redeemable non-controlling interest | (2) |  |  |  | (2) |  |
Net income attributable to non-controlling interest | (1) |  |  |  | (28) |  | 27
Net income | 2,554 |  |  |  | 2,554 |  |
Ending balance (in shares) at Dec. 31, 2017 |  | 600,000,000 | (17,000,000) |  |  |  |
Ending balance at Dec. 31, 2017 | 16,985 | $ 6 | $ (1,076) | 11,392 | 6,858 | (223) | 28
Redeemable non-controlling interest, Beginning balance at Dec. 31, 2016 | 36 |  |  |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |
Redeemable non-controlling interest | (37) |  |  |  |  |  |
Net income attributable to non-controlling interest | 1 |  |  |  |  |  |
Redeemable non-controlling interest, Ending balance at Dec. 31, 2017 | 0 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Other comprehensive income | (92) |  |  |  |  | (92) |
Other comprehensive loss | $ (66) |  |  |  |  | (66) |
Exercise of common stock options (in shares) | 908,000 | 1,000,000 |  |  |  |  |
Exercise of common stock options | $ 32 |  |  | 32 |  |  |
Repurchases of common stock (in shares) | (16,257,000) |  | (16,000,000) |  |  |  |
Repurchases of common stock | $ (1,198) |  | $ (1,198) |  |  |  |
Payments relating to treasury shares (in shares) | (1,500,000) |  | (2,000,000) |  |  |  |
Payments relating to treasury shares | $ (80) |  | $ (80) |  |  |  |
Stock-based compensation | 146 |  |  | 146 |  |  |
Issuance of restricted stock (in shares) |  | 3,000,000 |  |  |  |  |
Issuance of restricted stock | 0 |  |  |  |  |  |
Acquisition of non-controlling interest | (25) |  |  | (23) | 0 |  | (2)
Distributions of profits | (28) |  |  |  |  |  | (28)
Dividends paid to stockholders | (555) |  |  |  | (555) |  |
Net income attributable to non-controlling interest | 0 |  |  |  | (32) |  | 32
Impact of adoption of ASU 2018-02 to reclassify items stranded in other comprehensive income | 0 |  |  |  | 26 | (26) |
Net income | $ 2,020 |  |  |  | 2,020 |  |
Ending balance (in shares) at Dec. 31, 2018 | 604,000,000 | 604,000,000 | (35,000,000) |  |  |  |
Ending balance at Dec. 31, 2018 | $ 17,231 | $ 6 | $ (2,354) | 11,547 | 8,317 | (315) | 30
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |
Redeemable non-controlling interest | 71 |  |  |  |  |  |
Redeemable non-controlling interest, Ending balance at Dec. 31, 2018 | 71 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Other comprehensive income | $ 72 |  |  |  |  | 72 |
Exercise of common stock options (in shares) | 598,000 | 1,000,000 |  |  |  |  |
Exercise of common stock options | $ 23 |  |  | 23 |  |  |
Repurchases of common stock (in shares) | (17,432,000) |  | (17,000,000) |  |  |  |
Repurchases of common stock | $ (1,460) |  | $ (1,460) |  |  |  |
Payments relating to treasury shares (in shares) | (1,000,000.0) |  | (1,000,000) |  |  |  |
Payments relating to treasury shares | $ (65) |  | $ (65) |  |  |  |
Stock-based compensation | 143 |  |  | 143 |  |  |
Issuance under the employee stock purchase plan | 29 |  |  | 29 |  |  |
Issuance of restricted stock (in shares) |  | 2,000,000 |  |  |  |  |
Issuance of restricted stock | 0 |  |  |  |  |  |
Distributions of profits | (29) |  |  |  |  |  | (29)
Dividends paid to stockholders | (621) |  |  |  | (621) |  |
Net income attributable to non-controlling interest | 3 |  |  |  | (27) |  | 30
Net income | $ 1,960 |  |  |  | 1,960 |  |
Ending balance (in shares) at Dec. 31, 2019 | 607,000,000 | 607,000,000 | (53,000,000) |  |  |  |
Ending balance at Dec. 31, 2019 | $ 17,286 | $ 6 | $ (3,879) | $ 11,742 | $ 9,629 | $ (243) | $ 31
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |  |  |
Stock-based compensation | 11 |  |  |  |  |  |
Net income attributable to non-controlling interest | (4) |  |  |  |  |  |
Redeemable non-controlling interest, Ending balance at Dec. 31, 2019 | $ 78 |  |  |  |  |  |

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