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Goodwill - Summary of Goodwill Identified by Segment (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill, Beginning balance		$ 314,000,000	$ 328,000,000
Additions		6,000,000
Impairment	$ (81,000,000)	(81,000,000)	0	$ 0
Foreign currency translation adjustments		6,000,000	(14,000,000)
Goodwill, Ending balance	245,000,000	245,000,000	314,000,000	328,000,000
United States [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		119,000,000	119,000,000
Additions		6,000,000
Goodwill, Ending balance	125,000,000	125,000,000	119,000,000	119,000,000
Canada [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		90,000,000	98,000,000
Impairment		(27,000,000)
Foreign currency translation adjustments		4,000,000	(8,000,000)
Goodwill, Ending balance	67,000,000	67,000,000	90,000,000	98,000,000
International [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		105,000,000	111,000,000
Impairment		(54,000,000)
Foreign currency translation adjustments		2,000,000	(6,000,000)
Goodwill, Ending balance	$ 53,000,000	$ 53,000,000	$ 105,000,000	$ 111,000,000

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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-Publisher FASB
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-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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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.

+ References

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