Significant Accounting Policies - Noncurrent Deferred Tax Assets Recorded in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Equity [Abstract]
Balance at beginning of period	$ 40	$ 53	$ 41	$ 54
Tax effect of other comprehensive earnings	0	0	(1)	(1)
Balance at end of period	$ 40	$ 53	$ 40	$ 53