Accumulated Other Comprehensive Income (Loss) ("AOCI") - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated other comprehensive income (loss), Beginning balance	$ (150)
Amounts reclassified from accumulated other comprehensive income (loss)		$ 10
Net current-period other comprehensive income (loss)	5	(3)	$ (2)
Accumulated other comprehensive income (loss), Ending balance	(145)	(150)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated other comprehensive income (loss), Beginning balance	(150)	(147)
Other comprehensive income (loss) before reclassifications	5	(13)
Amounts reclassified from accumulated other comprehensive income (loss)	0	10
Net current-period other comprehensive income (loss)	5	(3)	(2)
Accumulated other comprehensive income (loss), Ending balance	$ (145)	$ (150)	$ (147)