Restructuring Charges - Summary of Restructuring Expenses (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 40	$ 37	$ 5
Cost of Goods Sold
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	9	13	4
Selling, General and Administrative Expenses
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 31	$ 24	$ 1

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration