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Earnings Per Share - Additional Information (Detail) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2025
Jun. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Undistributed earnings $ 1   $ 10  
Preferred stock dividends paid $ 1 $ 0 $ 1  
Stock Awards and Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Common shares equivalents that would have been included in diluted average shares outstanding       2
Number of anti-dilutive securities       3