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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Millions, $ in Millions | Total | Cumulative effect from the adoption of new accounting standard | Common Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income | Retained Earnings | Retained Earnings Cumulative effect from the adoption of new accounting standard | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2019 |  |  | 1,266 |  |  |  |  |
Beginning balance at Dec. 31, 2019 | $ 22,650 | $ (7) | $ 1 | $ 3,051 | $ 85 | $ 19,388 | $ (7) | $ 125
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Change in noncontrolling interest | (72) |  |  |  |  |  |  | (72)
Net income (loss) | (1,455) |  |  |  |  | (1,428) |  | (27)
Other comprehensive income (loss), net of tax | (62) |  |  | 1 | (62) | (1) |  |
Issuances under employee stock purchase plan (in shares) |  |  | 2 |  |  |  |  |
Issuances under employee stock purchase plan | 100 |  |  | 100 |  |  |  |
Issuance under equity incentive plans (in shares) |  |  | 10 |  |  |  |  |
Issuances under equity incentive plans | 148 |  |  | 148 |  |  |  |
Stock-based compensation | 482 |  |  | 482 |  |  |  |
Repurchases of common stock (in shares) |  |  | (25) |  |  |  |  |
Repurchases of common stock | (1,714) |  |  | (70) |  | (1,644) |  |
Dividends declared | (2,599) |  |  |  |  | (2,599) |  |
Ending balance (in shares) at Sep. 30, 2020 |  |  | 1,253 |  |  |  |  |
Ending balance at Sep. 30, 2020 | 17,471 |  | $ 1 | 3,712 | 23 | 13,709 |  | 26
Beginning balance (in shares) at Jun. 30, 2020 |  |  | 1,254 |  |  |  |  |
Beginning balance at Jun. 30, 2020 | 18,142 |  | $ 1 | 3,511 | 70 | 14,445 |  | 115
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Change in noncontrolling interest | (82) |  |  |  |  |  |  | (82)
Net income (loss) | 353 |  |  |  |  | 360 |  | (7)
Other comprehensive income (loss), net of tax | (47) |  |  | 1 | (47) | (1) |  |
Issuances under employee stock purchase plan (in shares) |  |  | 1 |  |  |  |  |
Issuances under employee stock purchase plan | 34 |  |  | 34 |  |  |  |
Issuance under equity incentive plans (in shares) |  |  | 2 |  |  |  |  |
Issuances under equity incentive plans | 2 |  |  | 2 |  |  |  |
Stock-based compensation | 173 |  |  | 173 |  |  |  |
Repurchases of common stock (in shares) |  |  | (4) |  |  |  |  |
Repurchases of common stock | (238) |  |  | (9) |  | (229) |  |
Dividends declared | (866) |  |  |  |  | (866) |  |
Ending balance (in shares) at Sep. 30, 2020 |  |  | 1,253 |  |  |  |  |
Ending balance at Sep. 30, 2020 | $ 17,471 |  | $ 1 | 3,712 | 23 | 13,709 |  | 26
Beginning balance (in shares) at Dec. 31, 2020 | 1,254 |  | 1,254 |  |  |  |  |
Beginning balance at Dec. 31, 2020 | $ 18,221 |  | $ 1 | 3,880 | (60) | 14,381 |  | 19
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 5,825 |  |  |  |  | 5,843 |  | (18)
Other comprehensive income (loss), net of tax | 134 |  |  |  | 134 |  |  |
Issuances under employee stock purchase plan (in shares) |  |  | 2 |  |  |  |  |
Issuances under employee stock purchase plan | 111 |  |  | 111 |  |  |  |
Issuance under equity incentive plans (in shares) |  |  | 9 |  |  |  |  |
Issuances under equity incentive plans | 46 |  |  | 46 |  |  |  |
Stock-based compensation | 479 |  |  | 479 |  |  |  |
Repurchases of common stock (in shares) |  |  | (10) |  |  |  |  |
Repurchases of common stock | (631) |  |  | (24) |  | (607) |  |
Dividends declared | $ (2,714) |  |  |  |  | (2,714) |  |
Ending balance (in shares) at Sep. 30, 2021 | 1,255 |  | 1,255 |  |  |  |  |
Ending balance at Sep. 30, 2021 | $ 21,471 |  | $ 1 | 4,492 | 74 | 16,903 |  | 1
Beginning balance (in shares) at Jun. 30, 2021 |  |  | 1,254 |  |  |  |  |
Beginning balance at Jun. 30, 2021 | 19,710 |  | $ 1 | 4,271 | 39 | 15,392 |  | 7
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 2,586 |  |  |  |  | 2,592 |  | (6)
Other comprehensive income (loss), net of tax | 35 |  |  |  | 35 |  |  |
Issuances under employee stock purchase plan (in shares) |  |  | 1 |  |  |  |  |
Issuances under employee stock purchase plan | 35 |  |  | 35 |  |  |  |
Issuance under equity incentive plans (in shares) |  |  | 3 |  |  |  |  |
Issuances under equity incentive plans | 22 |  |  | 22 |  |  |  |
Stock-based compensation | 171 |  |  | 171 |  |  |  |
Repurchases of common stock (in shares) |  |  | (3) |  |  |  |  |
Repurchases of common stock | (183) |  |  | (7) |  | (176) |  |
Dividends declared | $ (905) |  |  |  |  | (905) |  |
Ending balance (in shares) at Sep. 30, 2021 | 1,255 |  | 1,255 |  |  |  |  |
Ending balance at Sep. 30, 2021 | $ 21,471 |  | $ 1 | $ 4,492 | $ 74 | $ 16,903 |  | $ 1

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