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Accumulated Other Comprehensive Income (Loss) ("AOCI") - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accumulated other comprehensive income (loss), Beginning balance $ (145)    
Amounts reclassified from accumulated other comprehensive income (loss) 6    
Net current-period other comprehensive income (loss) (8) $ 5 $ (3)
Accumulated other comprehensive income (loss), Ending balance (153) (145)  
Accumulated Other Comprehensive Income (Loss) [Member]      
Accumulated other comprehensive income (loss), Beginning balance (145) (150)  
Other comprehensive income (loss) before reclassifications (14) 5  
Amounts reclassified from accumulated other comprehensive income (loss) 6 0  
Net current-period other comprehensive income (loss) (8) 5 (3)
Accumulated other comprehensive income (loss), Ending balance $ (153) $ (145) $ (150)