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Earnings Per Share Net Income for Earnings Per Share Calculations - Basic and Diluted (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Earnings Per Share [Abstract] |  |  |  |
Income (loss) from continuing operations after income taxes | $ (390) | $ (527) | $ 657 | $ (228)
Net income (loss) Attributable to Noncontrolling Interest, Continuing Operations | 2 | (11) | 18 | 10
Net income (loss) from Continuing Operations Available to Common Shareholders | (392) | (516) | 639 | (238)
Income (loss) from discontinued operations after income taxes | 0 | 22 | 1 | (695)
Income from Discontinued Operations, Attributable to Noncontrolling Interest | 0 | 0 | 0 | 5
Net (Loss) Income from Discontinued Operations Available to Common Shareholders | 0 | 22 | 1 | (700)
Net income (loss) Available to Common Stockholders | $ (392) | $ (494) | $ 640 | $ (938)

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