Goodwill - Summary of Goodwill Identified by Segment (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill, Beginning balance	$ 116,000,000	$ 67,000,000
Additions	23,000,000	49,000,000	$ 67,000,000
Impairment			0
Goodwill, Ending balance	139,000,000	116,000,000	67,000,000
United States [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	116,000,000	67,000,000
Additions	23,000,000	49,000,000
Goodwill, Ending balance	139,000,000	116,000,000	67,000,000
Canada [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	0	0
Additions	0	0
Goodwill, Ending balance	0	0	0
International [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	0	0
Additions	0	0
Goodwill, Ending balance	$ 0	$ 0	$ 0