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Earnings Per Share Net Income for Earnings Per Share Calculations - Basic and Diluted (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Earnings Per Share [Abstract] |  |  |  |  |
Income from continuing operations after income taxes | $ 766 | $ 483 | $ 1,047 | $ 299 | [1]
Net income Attributable to Noncontrolling Interest, Continuing Operations | 6 | 13 | 16 | 21 |
Net income from Continuing Operations Available to Common Shareholders | 760 | 470 | 1,031 | 278 |
Income (loss) from discontinued operations after income taxes | 0 | (1,077) | 1 | (717) |
Income from Discontinued Operations, Attributable to Noncontrolling Interest | 0 | 1 | 0 | 5 |
Net (Loss) Income from Discontinued Operations Available to Common Shareholders | 0 | (1,078) | 1 | (722) |
Net income (loss) Available to Common Stockholders | $ 760 | $ (608) | $ 1,032 | $ (444) |
[1] | Period is presented on a pro forma basis, prepared in accordance with Article 11 of Regulation S-X.

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