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Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Number of shares of common stock | Common stock and additional paid-in capital [Member] | Accumulated deficit [Member] | Accumulated other comprehensive loss [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance, Shares at Dec. 31, 2016 |  | 738.2 |  |  |
Beginning Balance at Dec. 31, 2016 | $ 29,875 |  | $ 30,784 | $ (438) | $ (471)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 1,979 |  |  | 1,979 |
Other comprehensive income (loss), net of tax | (208) |  |  |  | (208)
Dividends declared on common stock | (3,487) |  |  | (3,487) |
Issuance of common stock in connection with the Company’s equity award programs, Shares |  | 2.5 |  |  |
Issuance of common stock in connection with the Company’s equity award programs | 52 |  | 52 |  |
Stock-based compensation expense | 347 |  | 347 |  |
Tax impact related to employee stock-based compensation expense | (191) |  | (191) |  |
Repurchases of common stock, Shares |  | (18.5) |  |  |
Repurchases of common stock | (3,126) |  |  | (3,126) |
Ending Balance, Shares at Dec. 31, 2017 |  | 722.2 |  |  |
Ending Balance at Dec. 31, 2017 | 25,241 |  | 30,992 | (5,072) | (679)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 8,394 |  |  | 8,394 |
Other comprehensive income (loss), net of tax | (81) |  |  |  | (81)
Dividends declared on common stock | (3,482) |  |  | (3,482) |
Issuance of common stock in connection with the Company’s equity award programs, Shares |  | 1.9 |  |  |
Issuance of common stock in connection with the Company’s equity award programs | 56 |  | 56 |  |
Stock-based compensation expense | 327 |  | 327 |  |
Tax impact related to employee stock-based compensation expense | (129) |  | (129) |  |
Repurchases of common stock, Shares |  | (94.5) |  |  |
Repurchases of common stock | $ (17,855) |  |  | (17,855) |
Ending Balance, Shares at Dec. 31, 2018 | 629.6 | 629.6 |  |  |
Ending Balance at Dec. 31, 2018 | $ 12,500 |  | 31,246 | (17,977) | (769)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 7,842 |  |  | 7,842 |
Other comprehensive income (loss), net of tax | 241 |  |  |  | 241
Dividends declared on common stock | (3,555) |  |  | (3,555) |
Issuance of common stock in connection with the Company’s equity award programs, Shares |  | 2.0 |  |  |
Issuance of common stock in connection with the Company’s equity award programs | 97 |  | 97 |  |
Stock-based compensation expense | 323 |  | 323 |  |
Tax impact related to employee stock-based compensation expense | (135) |  | (135) |  |
Repurchases of common stock, Shares |  | (40.2) |  |  |
Repurchases of common stock | $ (7,640) |  |  | (7,640) |
Ending Balance, Shares at Dec. 31, 2019 | 591.4 | 591.4 |  |  |
Ending Balance at Dec. 31, 2019 | $ 9,673 |  | $ 31,531 | $ (21,330) | $ (528)

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