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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Basic |  |
Income from continuing operations | $ 1,116 | $ 2,677
Less: cumulative dividends on GM Financial preferred stock | (14) | 0
Income from continuing operations attributable to common stockholders | 1,102 | 2,677
Loss from discontinued operations, net of tax | 70 | 69
Net income attributable to common stockholders | $ 1,032 | $ 2,608
Weighted-average common shares outstanding - basic (in shares) | 1,408 | 1,505
Basic earnings per common share – continuing operations (in dollars per share) | $ 0.78 | $ 1.78
Basic loss per common share – discontinued operations (in dollars per share) | 0.05 | 0.05
Basic earnings per common share (in dollars per share) | $ 0.73 | $ 1.73
Diluted |  |
Income from continuing operations attributable to common stockholders – diluted | $ 1,102 | $ 2,677
Loss from discontinued operations, net of tax – diluted | 70 | 69
Net income attributable to common stockholders – diluted | $ 1,032 | $ 2,608
Weighted-average common shares outstanding - basic (in shares) | 1,408 | 1,505
Dilutive effect of warrants and awards under stock incentive plans | 22 | 27
Weighted-average common shares outstanding - diluted (in shares) | 1,430 | 1,532
Diluted earnings per common share – continuing operations (in dollars per share) | $ 0.77 | $ 1.75
Diluted loss per common share – discontinued operations (in dollars per share) | 0.05 | 0.05
Diluted earnings per common share (in dollars per share) | $ 0.72 | $ 1.70
Potentially dilutive securities (in shares) | 4 | 0

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