Goodwill - Goodwill by Operating Segment (Detail)	3 Months Ended	12 Months Ended
Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) reporting_unit
Goodwill
Balance at December 31, 2018		$ 395,000,000
Reassignment of Goodwill		0
Currency Translation Adjustments		1,000,000
Balance at December 31, 2019	$ 396,000,000	$ 396,000,000
Impairment of goodwill and acquired intangibles	0
Number of reporting units \| reporting_unit		3
Americas
Goodwill
Balance at December 31, 2018		$ 253,000,000
Reassignment of Goodwill		0
Currency Translation Adjustments		0
Balance at December 31, 2019	253,000,000	253,000,000
International
Goodwill
Balance at December 31, 2018		142,000,000
Reassignment of Goodwill		(142,000,000)
Currency Translation Adjustments		0
Balance at December 31, 2019	0	0
EMEA
Goodwill
Balance at December 31, 2018		0
Reassignment of Goodwill		88,000,000
Currency Translation Adjustments		0
Balance at December 31, 2019	88,000,000	88,000,000
APAC
Goodwill
Balance at December 31, 2018		0
Reassignment of Goodwill		54,000,000
Currency Translation Adjustments		1,000,000
Balance at December 31, 2019	$ 55,000,000	$ 55,000,000

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.

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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.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting 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.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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