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Earnings per Share (Unaudited) Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Earnings Per Share [Abstract] |  |  |  |
Net income (loss) from continuing operations | $ 124 | $ (74) | $ (425) | $ 1
Net (income) loss from continuing operations attributable to noncontrolling interests | (71) | 2 | (13) | (43)
Undistributed earnings allocated to participating securities | (3) | (3) | (3) | (3)
Net income (loss) from continuing operations attributable to common stockholders | 50 | (75) | (441) | (45)
Net income from discontinued operations attributable to common stockholders | 0 | 0 | 0 | 1
Net income (loss) attributable to common stockholders | $ 50 | $ (75) | $ (441) | $ (44)
Basic weighted-average shares of common stock outstanding | 1,453 | 1,451 | 1,453 | 1,451
Add shares issuable upon exercise or vesting of dilutive stock options and restricted stock units (RSUs) | 5 | 0 | 0 | 0
Diluted weighted-average shares of common stock outstanding | 1,458 | 1,451 | 1,453 | 1,451
Basic and diluted net income (loss) per share attributable to common stockholders: |  |  |  |
Continuing operations (in dollars per share) | $ 0.03 | $ (0.05) | $ (0.30) | $ (0.03)
Discontinued operations (in dollars per share) | 0 | 0 | 0 | 0
Earnings per share, basic (in dollars per share) | $ 0.03 | $ (0.05) | $ (0.30) | $ (0.03)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 10 | 10 | 12
Dilutive Securities Excluded from Computation of EPS Amount | 38 | 43 | 39 | 41

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