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Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Net income $ 2,453 $ 4,750 $ 4,887
Dividends and undistributed earnings allocated to participating securities (26) (77) (77)
Preferred stock dividends (252) (228) (228)
Net income available to common stockholders $ 2,181 $ 4,445 $ 4,582
Total weighted-average basic common shares outstanding (in shares) 540,700,000 382,700,000 382,400,000
Effect of dilutive securities:      
Stock options (in shares) 100,000 200,000 100,000
Other contingently issuable shares (in shares) 500,000 700,000 900,000
Total effect of dilutive securities (in shares) 600,000 900,000 1,000,000.0
Total weighted-average diluted common shares outstanding (in shares) 541,300,000 383,600,000 383,400,000
Basic earnings per common share:      
Net income (loss) from continuing operations (in dollars per share) $ 3.36 $ 11.60 $ 11.98
Net loss from discontinued operations (in dollars per share) 0.67 0.01 0.00
Net income per basic common share (in dollars per share) 4.03 11.61 11.98
Diluted earnings per common share:      
Net income (loss) from continuing operations (in dollars per share) 3.36 11.58 11.95
Net loss from discontinued operations (in dollars per share) 0.67 0.01 0.00
Net income (loss) per diluted common share (in dollars per share) $ 4.03 $ 11.59 $ 11.95
Preferred Stock Redemption Discount   $ 0 $ 0
Award      
Diluted earnings per common share:      
Anti-dilutive options excluded from the computation of diluted earnings per share (in shares) 20,000 32,000 27,000
Stock options      
Diluted earnings per common share:      
Anti-dilutive options excluded from the computation of diluted earnings per share (in shares) 0 0 0