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Income Taxes Effects of Temporary Differences That Comprise Net Deffered Income Tax Liability (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Deferred income tax assets:    
Net operating losses, alternative minimum tax credit and other carryforwards $ 936 $ 768
Pension and other postretirement benefits 7 34
Long-term debt 0 13
Other 85 181
Deferred Tax Assets, Gross 1,028 996
Valuation allowance (95) (96)
Net deferred income tax assets 933 900
Deferred income tax liabilities:    
Property, plant and equipment (501) (782)
Investments in affiliates (3,547) (2,872)
Trademarks (72) (63)
Other (21) (109)
Deferred Tax Liabilities, Gross 4,141 3,826
Deferred Tax Liabilities $ (3,208) $ (2,926)