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Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Net income | $ 597 | $ 1,431 | $ 1,877 | $ 2,391
Dividends and undistributed earnings allocated to participating securities | (9) | (23) | (32) | (39)
Preferred stock dividends | (57) | (57) | (114) | (114)
Net income available to common stockholders | $ 531 | $ 1,351 | $ 1,731 | $ 2,238
Total weighted-average basic common shares outstanding (in shares) | 383,100,000 | 382,800,000 | 382,700,000 | 382,700,000
Effect of dilutive securities: |  |  |  |
Stock options (in shares) | 200,000 | 100,000 | 200,000 | 100,000
Other contingently issuable shares (in shares) | 600,000 | 800,000 | 800,000 | 1,000,000.0
Total effect of dilutive securities (in shares) | 800,000 | 900,000 | 1,000,000.0 | 1,100,000
Total weighted-average diluted common shares outstanding (in shares) | 383,900,000 | 383,700,000 | 383,700,000 | 383,800,000
Basic earnings per common share: |  |  |  |
Net income per basic common share (in dollars per share) | $ 1.39 | $ 3.53 | $ 4.52 | $ 5.85
Diluted earnings per common share: |  |  |  |
Net income per diluted common share (in dollars per share) | $ 1.38 | $ 3.52 | $ 4.51 | $ 5.83
Award |  |  |  |
Diluted earnings per common share: |  |  |  |
Anti-dilutive options excluded from the computation of diluted earnings per share (in shares) | 0 | 0 | 64,000 | 20,000

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