Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 21	$ 27	$ 87
2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	19
2020 Restructuring Plan \| Minimum
Restructuring Cost and Reserve [Line Items]
Estimated aggregate restructuring charges	30
2020 Restructuring Plan \| Maximum
Restructuring Cost and Reserve [Line Items]
Estimated aggregate restructuring charges	$ 35