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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