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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock, at Cost | Non-controlling Interests
--- | --- | --- | --- | --- | --- | --- | ---
Balance, shares at Dec. 31, 2020 |  | 133.0 |  |  |  |  |
Balance, value at Dec. 31, 2020 | $ 6,809 | $ 2 | $ 2,841 | $ 9,303 | $ (21) | $ (5,366) | $ 50
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 486 |  |  | 469 |  |  | 17
Other comprehensive income (loss), net of taxes | (10) |  |  |  | (10) |  |
Dividends declared | (82) |  |  | (82) |  |  |
Distributions to noncontrolling interest partners | (22) |  |  |  |  |  | (22)
Issuance of common stock under benefit plans | 5 |  | (29) |  |  | 34 |
Stock-based compensation expense | 18 |  | 18 |  |  |  |
Exercise of stock options, shares |  | 1.0 |  |  |  |  |
Exercise of stock options | 17 |  | 3 |  |  | 14 |
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans | (21) |  | (9) |  |  | $ (12) |
Purchases of treasury stock, shares |  | (3.0) |  |  |  | (3.4) |
Purchases of treasury stock | (410) |  |  |  |  | $ (410) |
Balance, shares at Mar. 31, 2021 |  | 131.0 |  |  |  |  |
Balance, value at Mar. 31, 2021 | 6,790 | $ 2 | 2,824 | 9,690 | (31) | (5,740) | 45
Balance, Value at Dec. 31, 2020 | 82 |  |  |  |  |  |
Redeemable Non-controlling Interest [Abstract] |  |  |  |  |  |  |
Net income | 4 |  |  |  |  |  |
Distributions to noncontrolling interest partners | (7) |  |  |  |  |  |
Balance, Value at Mar. 31, 2021 | 79 |  |  |  |  |  |
Balance, shares at Dec. 31, 2021 |  | 119.0 |  |  |  |  |
Balance, value at Dec. 31, 2021 | 6,483 | $ 2 | 2,260 | 7,649 | (14) | (3,453) | 39
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 371 |  |  | 355 |  |  | 16
Other comprehensive income (loss), net of taxes | (2) |  |  |  | (2) |  |
Dividends declared | (78) |  |  | (78) |  |  |
Distributions to noncontrolling interest partners | (17) |  |  |  |  |  | (17)
Issuance of common stock under benefit plans, shares |  | 1.0 |  |  |  |  |
Issuance of common stock under benefit plans | 7 |  | (41) |  |  | 48 |
Stock-based compensation expense | 18 |  | 18 |  |  |  |
Exercise of stock options | 10 |  | (1) |  |  | 11 |
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans | (27) |  | (10) |  |  | $ (17) |
Purchases of treasury stock, shares |  | (3.0) |  |  |  | (2.6) |
Purchases of treasury stock | (350) |  |  |  |  | $ (350) |
Balance, shares at Mar. 31, 2022 |  | 117.0 |  |  |  |  |
Balance, value at Mar. 31, 2022 | 6,415 | $ 2 | $ 2,226 | $ 7,926 | $ (16) | $ (3,761) | $ 38
Balance, Value at Dec. 31, 2021 | 79 |  |  |  |  |  |
Redeemable Non-controlling Interest [Abstract] |  |  |  |  |  |  |
Net income | 2 |  |  |  |  |  |
Distributions to noncontrolling interest partners | (3) |  |  |  |  |  |
Balance, Value at Mar. 31, 2022 | $ 78 |  |  |  |  |  |

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