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Statements of Consolidated Stockholder's Equity - USD ($) shares in Millions, $ in Millions | Total | United Airlines, Inc. | Common Stock | Additional Capital Invested | Additional Capital Invested United Airlines, Inc. | Treasury Stock | Accumulated Deficit | Accumulated Deficit United Airlines, Inc. | Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) United Airlines, Inc. | Receivable from Related Parties, Net United Airlines, Inc.
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance (in shares) at Dec. 31, 2014 |  |  | 375 |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2014 | $ 2,396 | $ 2,635 | $ 4 | $ 7,721 | $ 7,347 | $ (367) | $ (3,883) | $ (3,628) | $ (1,079) | $ (1,079) | $ (5)
Net income | 7,340 | 7,301 |  |  |  |  | 7,340 | 7,301 |  |  |
Other comprehensive income (loss) | 248 | 248 |  |  |  |  |  |  | 248 | 248 |
Convertible debt redemptions (in shares) |  |  | 11 |  |  |  |  |  |  |  |
Convertible debt redemptions | 202 |  |  | 202 |  |  |  |  |  |  |
Dividend to UAL |  | (1,232) |  |  | (1,232) |  |  |  |  |  |
Share-based compensation | 7 | 7 |  | 7 | 7 |  |  |  |  |  |
Proceeds from exercise of stock options | 16 |  |  | 16 |  |  |  |  |  |  |
UAL contribution related to stock plans |  | 16 |  |  | 16 |  |  |  |  |  |
Repurchases of common stock | (1,232) |  |  |  |  | (1,232) |  |  |  |  |
Repurchases of common stock (in shares) |  |  | (21) |  |  |  |  |  |  |  |
Other | (11) | (12) |  |  |  | (11) |  |  |  |  | (12)
Ending Balance (in shares) at Dec. 31, 2015 |  |  | 365 |  |  |  |  |  |  |  |
Ending Balance at Dec. 31, 2015 | 8,966 | 8,963 | $ 4 | 7,946 | 6,138 | (1,610) | 3,457 | 3,673 | (831) | (831) | (17)
Net income | 2,263 | 2,264 |  |  |  |  | 2,263 | 2,264 |  |  |
Other comprehensive income (loss) | 2 | 2 |  |  |  |  |  |  | 2 | 2 |
Dividend to UAL |  | (2,603) |  |  | (2,603) |  |  |  |  |  |
Share-based compensation | 32 | 32 |  | 32 | 32 |  |  |  |  |  |
Proceeds from exercise of stock options | 6 |  |  | 6 |  |  |  |  |  |  |
UAL contribution related to stock plans |  | 6 |  |  | 6 |  |  |  |  |  |
Repurchases of common stock | (2,607) |  |  |  |  | (2,607) |  |  |  |  |
Repurchases of common stock (in shares) |  |  | (50) |  |  |  |  |  |  |  |
Treasury stock retired |  |  | $ (1) | (1,415) |  | 3,709 | (2,293) |  |  |  |
Other | (3) | (58) |  |  |  | (3) |  |  |  |  | (58)
Ending Balance (in shares) at Dec. 31, 2016 |  |  | 315 |  |  |  |  |  |  |  |
Ending Balance at Dec. 31, 2016 | 8,659 | 8,606 | $ 3 | 6,569 | 3,573 | (511) | 3,427 | 5,937 | (829) | (829) | (75)
Net income | 2,131 | 2,149 |  |  |  |  | 2,131 | 2,149 |  |  |
Other comprehensive income (loss) | (200) | (200) |  |  |  |  |  |  | (200) | (200) |
Dividend to UAL |  | (1,844) |  |  | (1,844) |  |  |  |  |  |
Share-based compensation | 56 | 56 |  | 56 | 56 |  |  |  |  |  |
Proceeds from exercise of stock options | 2 |  |  | 2 |  |  |  |  |  |  |
UAL contribution related to stock plans |  | 2 |  |  | 2 |  |  |  |  |  |
Repurchases of common stock | $ (1,844) |  |  |  |  | (1,844) |  |  |  |  |
Repurchases of common stock (in shares) | (28) |  | (28) |  |  |  |  |  |  |  |
Treasury stock retired |  |  |  | (508) |  | 1,576 | (1,068) |  |  |  |
Net treasury stock issued for share-based awards | $ (12) |  |  | (21) |  | 10 | (1) |  |  |  |
Excess tax benefits from share-based awards | 14 | 14 |  |  |  |  | 14 | 14 |  |  |
Reclassification of stranded tax effects (Note 1) |  |  |  |  |  |  | 118 | 118 | (118) | (118) |
Other |  | (15) |  |  |  |  |  |  |  |  | (15)
Ending Balance (in shares) at Dec. 31, 2017 |  |  | 287 |  |  |  |  |  |  |  |
Ending Balance at Dec. 31, 2017 | $ 8,806 | $ 8,768 | $ 3 | $ 6,098 | $ 1,787 | $ (769) | $ 4,621 | $ 8,218 | $ (1,147) | $ (1,147) | $ (90)

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