Business Segments - Summary of Operating Results by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue:
Total revenue	$ 539	$ 400	$ 1,012	$ 761
Operating profit (loss):
Total operating profit (loss)	29	(0)	52	(8)
United States [Member]
Revenue:
Total revenue	408	296	742	548
Operating profit (loss):
Total operating profit (loss)	32	(3)	46	(16)
Canada [Member]
Revenue:
Total revenue	72	51	154	109
Operating profit (loss):
Total operating profit (loss)	6	2	13	6
International [Member]
Revenue:
Total revenue	59	53	116	104
Operating profit (loss):
Total operating profit (loss)	$ (9)	$ 1	$ (7)	$ 2