Goodwill (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Goodwill Identified by Segment

Goodwill is identified by segment as follows (in millions):

	United States			Canada			International			Total
Balance at December 31, 2018 (1)	$	119		$	90		$	105		$	314
Additions		6			—			—			6
Impairment		—			(27	)		(54	)		(81	)
Foreign currency translation adjustments		—			4			2			6
Balance at December 31, 2019	$	125		$	67		$	53		$	245
Impairment		(125	)		(60	)		(45	)		(230	)
Foreign currency translation adjustments		—			(7	)		(8	)		(15	)
Balance at December 31, 2020	$	—		$	—		$	—		$	—

⁽¹⁾ The United States segment is net of prior years accumulated impairment of $393 million.