Goodwill - Summary of Goodwill Identified by Segment (Parenthetical) (Detail) $ in Millions	Dec. 31, 2021 USD ($)
United States [Member]
Goodwill [Line Items]
Goodwill, accumulated impairment	$ 518
Canada [Member]
Goodwill [Line Items]
Goodwill, accumulated impairment	87
International [Member]
Goodwill [Line Items]
Goodwill, accumulated impairment	$ 99

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details