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Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Income (loss) from continuing operations, net of tax | $ 3,327 | $ (1,340)
Loss from discontinued operations, net of tax | (2) | 0
Net Income (Loss) | 3,325 | (1,340)
Dividends and undistributed earnings allocated to participating securities | (28) | (3)
Preferred stock dividends | (61) | (55)
Issuance cost for redeemed preferred stock | 0 | (22)
Net income (loss) available to common stockholders | $ 3,236 | $ (1,420)
Total weighted-average basic common shares outstanding | 458,600 | 457,600
Effect of dilutive securities: |  |
Stock options | 800 | 0
Other contingently issuable shares | 700 | 0
Total effect of dilutive securities | 1,500 | 0
Total weighted-average diluted common shares outstanding | 460,100 | 457,600
Basic earnings per common share: |  |
Net income (loss) from continuing operations (in dollars per share) | $ 7.06 | $ (3.10)
Net income (loss) per basic common share (in dollars per share) | 7.06 | (3.10)
Diluted earnings per common share: |  |
Net income (loss) from continuing operations (in dollars per share) | 7.03 | (3.10)
Net income (loss) per diluted common share (in dollars per share) | $ 7.03 | $ (3.10)
Stock option |  |
Diluted earnings per common share: |  |
Anti-dilutive options excluded from the computation of diluted earnings per share (in shares) | 103 | 1,600
Minimum exercise price range (in dollars per share) |  | $ 36.55
Maximum exercise price range |  | $ 86.34
Award |  |
Diluted earnings per common share: |  |
Anti-dilutive options excluded from the computation of diluted earnings per share (in shares) |  | 2,800

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