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Goodwill - Goodwill by Operating Segment (Detail)	3 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) reporting_unit
Goodwill
Balance at December 31, 2019		$ 396,000,000
Currency Translation Adjustments		5,000,000
Balance at December 31, 2020	$ 396,000,000	401,000,000	$ 396,000,000
Impairment of goodwill and acquired intangibles	0
Number of reporting units | reporting_unit			3
Americas
Goodwill
Balance at December 31, 2019		253,000,000
Currency Translation Adjustments		0
Balance at December 31, 2020	253,000,000	253,000,000	$ 253,000,000
EMEA
Goodwill
Balance at December 31, 2019		88,000,000
Currency Translation Adjustments		4,000,000
Balance at December 31, 2020	88,000,000	92,000,000	88,000,000
APJ
Goodwill
Balance at December 31, 2019		55,000,000
Currency Translation Adjustments		1,000,000
Balance at December 31, 2020	$ 55,000,000	$ 56,000,000	$ 55,000,000

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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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 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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