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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions | Total | Revision of Prior Period Accounting Standards Update Adjustment [Member] | Common Stock [Member] | Additional Paid in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings (Deficit) [Member] | Retained Earnings (Deficit) [Member] Revision of Prior Period Accounting Standards Update Adjustment [Member] | Total Company Stockholders' Equity [Member] | Total Company Stockholders' Equity [Member] Revision of Prior Period Accounting Standards Update Adjustment [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2019 | $ 7,846 | $ (5) | $ 4 | $ 8,507 | $ (1,423) | $ 690 | $ (5) | $ 7,778 | $ (5) | $ 68
Begining Balance, shares at Dec. 31, 2019 |  |  | 386 |  |  |  |  |  |  |
Net income (loss) | (2,049) |  |  |  |  | (2,047) |  | (2,047) |  | (2)
Other comprehensive income (loss) | (232) |  |  |  | (232) |  |  | (232) |  |
Cash dividends, per common share | $ (19) |  |  |  |  | $ (19) |  | $ (19) |  |
Accounting Standards Update Extensible List | us-gaap:AccountingStandardsUpdate201802Member |  |  |  |  | us-gaap:AccountingStandardsUpdate201802Member |  | us-gaap:AccountingStandardsUpdate201802Member |  |
Stock-based compensation | $ 27 |  |  | 27 |  |  |  | $ 27 |  |
Common stock issued, shares |  |  | 2 |  |  |  |  |  |  |
Withholding taxes | (18) |  |  | (18) |  |  |  | (18) |  |
Other | 2 |  |  |  |  |  |  |  |  | 2
Ending Balance at Mar. 31, 2020 | 5,552 |  | $ 4 | 8,516 | (1,655) | $ (1,381) |  | 5,484 |  | 68
Ending Balance, shares at Mar. 31, 2020 |  |  | 388 |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2019 | 7,846 | $ (5) | $ 4 | 8,507 | (1,423) | 690 | $ (5) | 7,778 | $ (5) | 68
Begining Balance, shares at Dec. 31, 2019 |  |  | 386 |  |  |  |  |  |  |
Net income (loss) | (2,136) |  |  |  |  |  |  |  |  |
Cash dividends, per common share | (19) |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2020 | 5,533 |  | $ 4 | 8,543 | (1,613) | (1,474) |  | 5,460 |  | 73
Ending Balance, shares at Jun. 30, 2020 |  |  | 388 |  |  |  |  |  |  |
Beginning Balance at Mar. 31, 2020 | 5,552 |  | $ 4 | 8,516 | (1,655) | (1,381) |  | 5,484 |  | 68
Begining Balance, shares at Mar. 31, 2020 |  |  | 388 |  |  |  |  |  |  |
Net income (loss) | (87) |  |  |  |  | (93) |  | (93) |  | 6
Other comprehensive income (loss) | 42 |  |  |  | 42 |  |  | 42 |  |
Cash dividends, per common share | 0 |  |  |  |  |  |  |  |  |
Stock-based compensation | 27 |  |  | 27 |  |  |  | 27 |  |
Other | (1) |  |  |  |  |  |  |  |  | (1)
Ending Balance at Jun. 30, 2020 | 5,533 |  | $ 4 | 8,543 | (1,613) | (1,474) |  | 5,460 |  | 73
Ending Balance, shares at Jun. 30, 2020 |  |  | 388 |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2020 | 5,279 |  | $ 4 | 8,591 | (1,509) | (1,876) |  | 5,210 |  | 69
Begining Balance, shares at Dec. 31, 2020 |  |  | 388 |  |  |  |  |  |  |
Net income (loss) | (114) |  |  |  |  | (115) |  | (115) |  | 1
Other comprehensive income (loss) | (21) |  |  |  | (21) |  |  | (21) |  |
Stock-based compensation | 20 |  |  | 20 |  |  |  | 20 |  |
Common stock issued, shares |  |  | 2 |  |  |  |  |  |  |
Withholding taxes | (13) |  |  | (13) |  |  |  | (13) |  |
Other | (1) |  |  |  |  |  |  |  |  | (1)
Ending Balance at Mar. 31, 2021 | 5,150 |  | $ 4 | 8,598 | (1,530) | (1,991) |  | 5,081 |  | 69
Ending Balance, shares at Mar. 31, 2021 |  |  | 390 |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2020 | 5,279 |  | $ 4 | 8,591 | (1,509) | (1,876) |  | 5,210 |  | 69
Begining Balance, shares at Dec. 31, 2020 |  |  | 388 |  |  |  |  |  |  |
Net income (loss) | (137) |  |  |  |  |  |  |  |  |
Cash dividends, per common share | 0 |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2021 | 5,178 |  | $ 4 | 8,618 | (1,497) | (2,017) |  | 5,108 |  | 70
Ending Balance, shares at Jun. 30, 2021 |  |  | 391 |  |  |  |  |  |  |
Beginning Balance at Mar. 31, 2021 | 5,150 |  | $ 4 | 8,598 | (1,530) | (1,991) |  | 5,081 |  | 69
Begining Balance, shares at Mar. 31, 2021 |  |  | 390 |  |  |  |  |  |  |
Net income (loss) | (23) |  |  |  |  | (26) |  | (26) |  | 3
Other comprehensive income (loss) | 33 |  |  |  | 33 |  |  | 33 |  |
Cash dividends, per common share | 0 |  |  |  |  |  |  |  |  |
Stock-based compensation | 20 |  |  | 20 |  |  |  | 20 |  |
Common stock issued, shares |  |  | 1 |  |  |  |  |  |  |
Other | (2) |  |  |  |  |  |  |  |  | (2)
Ending Balance at Jun. 30, 2021 | $ 5,178 |  | $ 4 | $ 8,618 | $ (1,497) | $ (2,017) |  | $ 5,108 |  | $ 70
Ending Balance, shares at Jun. 30, 2021 |  |  | 391 |  |  |  |  |  |  |

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