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Condensed Consolidated Statement of Stockholders' Equity Statement - USD ($) $ in Millions | Total | Treasury stock | Accumulated other comprehensive income (loss) | Retained earnings | Capital in excess of par value | Common Stock
--- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cumulative effect of new accounting standards | $ 55 | $ 0 | $ 0 | $ 55 | $ 0 | $ 0
Balance at beginning of period at Dec. 31, 2018 | 9,853 | (8,452) | 20 | 15,967 | 1,510 | 808
Balance at beginning of period (Accounting Standards Update 2016-02) at Dec. 31, 2018 | 9,908 | (8,452) | 20 | 16,022 | 1,510 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Repurchase of common stock | (500) | (500) | 0 | 0 | 0 | 0
Issuance of common and treasury stock pursuant to Employee stock plans | 4 | 6 | 0 | 0 | 10 | 0
Share-based compensation | (13) | 0 | 0 | 0 | (13) | 0
Cash dividends | (89) | 0 | 0 | 89 | 0 | 0
Comprehensive income (loss) | 463 | 0 | 76 | 387 | 0 | 0
Balance at end of period at Mar. 31, 2019 | $ 9,791 | (8,946) | 96 | 16,320 | 1,513 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cash dividends, per share (in dollars per share) | $ 0.160 |  |  |  |  |
Balance at beginning of period at Dec. 31, 2018 | $ 9,853 | (8,452) | 20 | 15,967 | 1,510 | 808
Balance at beginning of period (Accounting Standards Update 2016-02) at Dec. 31, 2018 | 9,908 | (8,452) | 20 | 16,022 | 1,510 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Comprehensive income (loss) | 1,138 |  |  |  |  |
Balance at end of period at Jun. 30, 2019 | 9,940 | (9,394) | 30 | 16,962 | 1,534 | 808
Balance at beginning of period at Mar. 31, 2019 | 9,791 | (8,946) | 96 | 16,320 | 1,513 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Repurchase of common stock | (450) | (450) | 0 | 0 | 0 | 0
Issuance of common and treasury stock pursuant to Employee stock plans | 10 | 2 | 0 | 0 | (8) | 0
Share-based compensation | (13) | 0 | 0 | 0 | (13) | 0
Cash dividends | (99) | 0 | 0 | 99 | 0 | 0
Comprehensive income (loss) | 675 | 0 | (66) | 741 | 0 | 0
Balance at end of period at Jun. 30, 2019 | $ 9,940 | (9,394) | 30 | 16,962 | 1,534 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cash dividends, per share (in dollars per share) | $ 0.180 |  |  |  |  |
Balance at beginning of period at Dec. 31, 2019 | $ 9,832 | (10,441) | (61) | 17,945 | 1,581 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Repurchase of common stock | (451) | (451) | 0 | 0 | 0 | 0
Issuance of common and treasury stock pursuant to Employee stock plans | 2 | 6 | 0 | 0 | 8 | 0
Share-based compensation | (9) | 0 | 0 | 0 | (9) | 0
Cash dividends | (94) | 0 | 0 | (94) | 0 | 0
Comprehensive income (loss) | (219) | 0 | (125) | (94) | 0 | 0
Balance at end of period at Mar. 31, 2020 | $ 9,075 | (10,886) | (186) | 17,757 | 1,582 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cash dividends, per share (in dollars per share) | $ 0.180 |  |  |  |  |
Balance at beginning of period at Dec. 31, 2019 | $ 9,832 | (10,441) | (61) | 17,945 | 1,581 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Comprehensive income (loss) | (1,078) |  |  |  |  |
Balance at end of period at Jun. 30, 2020 | 10,878 | (10,881) | (130) | 16,842 | 4,159 | 888
Balance at beginning of period at Mar. 31, 2020 | 9,075 | (10,886) | (186) | 17,757 | 1,582 | 808
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Issuance of common and treasury stock pursuant to Employee stock plans | 13 | 5 | 0 | 0 | 8 | 0
Share-based compensation | 2 | 0 | 0 | 0 | 2 | 0
Stock warrants | 35 | 0 | 0 | 0 | 35 | 0
Equity feature of convertible notes, net of issuance costs | 392 | 0 | 0 | 0 | 392 | 0
Comprehensive income (loss) | (859) | 0 | 56 | (915) | 0 | 0
Balance at end of period at Jun. 30, 2020 | 10,878 | (10,881) | (130) | 16,842 | 4,159 | 888
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Issued During Period, Value, New Issues | $ 2,224 | $ 0 | $ 0 | $ 0 | $ 2,144 | $ 80

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