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Restructuring, Asset-Related, and Other Charges - Schedule of Restructuring Program (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring And Related Activities [Abstract]
Employee separation charges	$ 17	$ 21	$ 14
Decommissioning and other charges	41	23	31
Total restructuring and other charges	58	44	45
Asset-related charges	22	43	4
Total restructuring, asset-related, and other charges	$ 80	$ 87	$ 49

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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