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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions | Total | Common shares [Member] | Additional paid-in capital [Member] | Retained earnings [Member] | Treasury shares [Member] | AOCI Attributable to Parent [Member]
--- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cumulative effect of change in accounting policy | $ (5) |  |  |  |  |
Cumulative effect of change in accounting policy | Accounting Standards Update 2016-13 [Member] |  |  |  | $ (5) |  |
Beginning balance (in shares) at Dec. 31, 2018 |  | 136,330,747 |  |  |  |
Beginning balance at Dec. 31, 2018 | 5,588 | $ 3 | $ 8,260 | 12,909 | $ (15,293) | $ (291)
Comprehensive income (loss) [Abstract] |  |  |  |  |  |
Net income | 887 |  |  | 887 |  |
Other comprehensive income (loss), net of tax | 560 |  |  |  |  | 560
Total comprehensive income | 1,447 |  |  |  |  |
Dividends to shareholders | (261) |  |  | (261) |  |
Repurchase of common shares (in shares) |  | (6,452,276) |  |  |  |
Repurchase of common shares | (872) |  |  |  | (872) |
Share-based compensation plans (in shares) |  | 1,414,288 |  |  |  |
Share-based compensation plans | 133 |  | 77 |  | 56 |
Ending balance (in shares) at Jun. 30, 2019 |  | 131,292,759 |  |  |  |
Ending balance at Jun. 30, 2019 | 6,030 | $ 3 | 8,337 | 13,530 | (16,109) | 269
Beginning balance (in shares) at Mar. 31, 2019 |  | 134,183,507 |  |  |  |
Beginning balance at Mar. 31, 2019 | 5,843 | $ 3 | 8,270 | 13,172 | (15,637) | 35
Comprehensive income (loss) [Abstract] |  |  |  |  |  |
Net income | 492 |  |  | 492 |  |
Other comprehensive income (loss), net of tax | 234 |  |  |  |  | 234
Total comprehensive income | 726 |  |  |  |  |
Dividends to shareholders | (134) |  |  | (134) |  |
Repurchase of common shares (in shares) |  | (3,252,369) |  |  |  |
Repurchase of common shares | (473) |  |  |  | (473) |
Share-based compensation plans (in shares) |  | 361,621 |  |  |  |
Share-based compensation plans | 68 |  | 67 |  | 1 |
Ending balance (in shares) at Jun. 30, 2019 |  | 131,292,759 |  |  |  |
Ending balance at Jun. 30, 2019 | 6,030 | $ 3 | 8,337 | 13,530 | (16,109) | 269
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cumulative effect of change in accounting policy | (9) |  |  |  |  |
Cumulative effect of change in accounting policy | Cumulative effect of adoption of equity securities guidance |  |  |  | (9) |  |
Beginning balance (in shares) at Dec. 31, 2019 |  | 123,939,234 |  |  |  |
Beginning balance at Dec. 31, 2019 | 5,729 | $ 3 | 8,461 | 14,279 | (17,276) | 262
Comprehensive income (loss) [Abstract] |  |  |  |  |  |
Net income | 1,497 |  |  | 1,497 |  |
Other comprehensive income (loss), net of tax | 132 |  |  |  |  | 132
Total comprehensive income | 1,629 |  |  |  |  |
Dividends to shareholders | (257) |  |  | (257) |  |
Repurchase of common shares (in shares) |  | (5,176,677) |  |  |  |
Repurchase of common shares | (794) |  |  |  | (794) |
Share-based compensation plans (in shares) |  | 1,844,944 |  |  |  |
Share-based compensation plans | $ 202 |  | 161 |  | 41 |
Ending balance (in shares) at Jun. 30, 2020 | 120,607,501 | 120,607,501 |  |  |  |
Ending balance at Jun. 30, 2020 | $ 6,500 | $ 3 | 8,622 | 15,510 | (18,029) | 394
Beginning balance (in shares) at Mar. 31, 2020 |  | 122,334,887 |  |  |  |
Beginning balance at Mar. 31, 2020 | 6,693 | $ 3 | 8,578 | 16,180 | (17,773) | (295)
Comprehensive income (loss) [Abstract] |  |  |  |  |  |
Net income | (539) |  |  | (539) |  |
Other comprehensive income (loss), net of tax | 689 |  |  |  |  | 689
Total comprehensive income | 150 |  |  |  |  |
Dividends to shareholders | (131) |  |  | (131) |  |
Repurchase of common shares (in shares) |  | (1,794,058) |  |  |  |
Repurchase of common shares | (257) |  |  |  | (257) |
Share-based compensation plans (in shares) |  | 66,672 |  |  |  |
Share-based compensation plans | $ 45 |  | 44 |  | 1 |
Ending balance (in shares) at Jun. 30, 2020 | 120,607,501 | 120,607,501 |  |  |  |
Ending balance at Jun. 30, 2020 | $ 6,500 | $ 3 | $ 8,622 | $ 15,510 | $ (18,029) | $ 394

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