Business Segments - Summary of Operating Results by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Total revenue	$ 473	$ 361
Operating profit (loss):
Total operating profit (loss)	23	(8)
United States [Member]
Revenue:
Total revenue	334	252
Operating profit (loss):
Total operating profit (loss)	14	(13)
Canada [Member]
Revenue:
Total revenue	82	58
Operating profit (loss):
Total operating profit (loss)	7	4
International [Member]
Revenue:
Total revenue	57	51
Operating profit (loss):
Total operating profit (loss)	$ 2	$ 1