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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] | Accumulated Other Comprehensive Income [Member]
--- | --- | --- | --- | --- | --- | ---
Comprehensive income (loss): |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | $ 6,289 | $ 3 | $ 7,765 | $ 10,348 | $ (12,027) | $ 200
Balances (in shares) at Dec. 31, 2016 |  | 154,759,904 |  |  |  |
Balances at Dec. 31, 2016 | 6,289 | $ 3 | 7,765 | 10,348 | (12,027) | 200
Comprehensive income (loss): |  |  |  |  |  |
Net income | 1,480 |  |  | 1,480 |  |
Other comprehensive income (loss), net of tax | 29 |  |  |  |  | 29
Total comprehensive income (loss) | 1,509 |  |  |  |  |
Dividends to shareholders | (502) |  |  | (502) |  |
Repurchase of common shares | (1,675) |  |  |  | (1,675) |
Repurchase of common shares (in shares) |  | (12,388,348) |  |  |  |
Share-based compensation plans | 374 |  | 320 |  | 54 |
Share-based compensation plans (in shares) |  | 4,263,108 |  |  |  |
Balances (in shares) at Dec. 31, 2017 |  | 146,634,664 |  |  |  |
Comprehensive income (loss): |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 6,289 | $ 3 | 7,765 | 10,348 | (12,027) | 200
Cumulative Effect of New Accounting Principle in Period of Adoption | (1) |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | Cumulative effect of adoption of equity securities guidance | 0 |  |  | 1 |  | (1)
Stockholders' Equity Attributable to Parent | 5,995 | 3 | 8,085 | 11,326 | (13,648) | 229
Balances at Dec. 31, 2017 | 5,995 | $ 3 | 8,085 | 11,326 | (13,648) | 229
Comprehensive income (loss): |  |  |  |  |  |
Net income | 2,098 |  |  | 2,098 |  |
Other comprehensive income (loss), net of tax | (519) |  |  |  |  | (519)
Total comprehensive income (loss) | 1,579 |  |  |  |  |
Dividends to shareholders | (516) |  |  | (516) |  |
Repurchase of common shares | (1,705) |  |  |  | (1,705) |
Repurchase of common shares (in shares) |  | (12,124,840) |  |  |  |
Share-based compensation plans | 235 |  | 175 |  | 60 |
Share-based compensation plans (in shares) |  | 1,820,923 |  |  |  |
Balances (in shares) at Dec. 31, 2018 |  | 136,330,747 |  |  |  |
Comprehensive income (loss): |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 5,995 | $ 3 | 8,085 | 11,326 | (13,648) | 229
Cumulative Effect of New Accounting Principle in Period of Adoption | Cumulative effect of adoption of premium amort on purchased callable debt | (5) |  |  | (5) |  |
Stockholders' Equity Attributable to Parent | 5,588 | 3 | 8,260 | 12,909 | (15,293) | (291)
Balances at Dec. 31, 2018 | 5,588 | $ 3 | 8,260 | 12,909 | (15,293) | (291)
Comprehensive income (loss): |  |  |  |  |  |
Net income | 1,893 |  |  | 1,893 |  |
Other comprehensive income (loss), net of tax | 553 |  |  |  |  | 553
Total comprehensive income (loss) | 2,446 |  |  |  |  |
Dividends to shareholders | (518) |  |  | (518) |  |
Repurchase of common shares | (2,039) |  |  |  | (2,039) |
Repurchase of common shares (in shares) |  | (14,396,367) |  |  |  |
Share-based compensation plans | 257 |  | 201 |  | 56 |
Share-based compensation plans (in shares) |  | 2,004,854 |  |  |  |
Balances (in shares) at Dec. 31, 2019 |  | 123,939,234 |  |  |  |
Comprehensive income (loss): |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 5,588 | $ 3 | 8,260 | 12,909 | (15,293) | (291)
Stockholders' Equity Attributable to Parent | $ 5,729 | $ 3 | $ 8,461 | $ 14,279 | $ (17,276) | $ 262

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