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Income Taxes - Deferred Tax Assets and Liabilities Temporary Differences (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Deferred income tax assets:    
Accrued postretirement and postemployment benefits $ 150 $ 147
Accrued pension costs 272 349
Other employee benefits 160 147
Accrued expenses 287 283
Loss carryforwards 589 707
Tax credit carryforwards 729 747
Other 438 302
Total deferred income tax assets 2,625 2,682
Valuation allowance (1,243) (1,153)
Net deferred income tax assets 1,382 1,529
Deferred income tax liabilities:    
Intangible assets, including impact from Swiss tax reform (2,772) (3,861)
Property, plant and equipment (663) (473)
Other (559) (492)
Total deferred income tax liabilities (3,994) (4,826)
Net deferred income tax liabilities $ (2,612) $ (3,297)