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Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Environmental and other liabilities $ 103 $ 99
Accrued litigation 21 37
Stock-based compensation and accrued employee benefits 50 29
Other assets and other accrued liabilities 43 19
Tax attribute carryforwards 134 96
Operating lease liability 60 75
Foreign tax credit carryforwards 7 18
Total deferred tax assets 418 373
Less: Valuation allowance (24) (10)
Total deferred tax assets, net 394 363
Deferred tax liabilities:    
Pension and other liabilities (12) (7)
Property, plant, and equipment (258) (320)
Operating lease asset (56) (71)
Inventories and other assets (8) (43)
Total deferred tax liabilities (334) (441)
Deferred tax liabilities net   $ (78)
Deferred tax assets net $ 60