Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Beginning balance	$ 565	$ 569
Acquisitions	10	3
Divestitures	0	0
Impairment	(182)	0
Translation	15	(7)
Ending balance	408	565
Americas
Goodwill [Roll Forward]
Beginning balance	91	91
Acquisitions	0	0
Divestitures	0	0
Impairment	0	0
Translation	0	0
Ending balance	91	91
Europe, Middle East & Africa
Goodwill [Roll Forward]
Beginning balance	411	415
Acquisitions	10	2
Divestitures	0	0
Impairment	(182)	0
Translation	11	(6)
Ending balance	250	411
Asia Pacific
Goodwill [Roll Forward]
Beginning balance	63	63
Acquisitions	0	1
Divestitures	0	0
Impairment	0	0
Translation	4	(1)
Ending balance	$ 67	$ 63

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 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.

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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.

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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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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 divestiture 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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