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Income Taxes (Schedule of Difference in Income Tax Effects Comprising Company's Deferred Income Tax Assets and Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred income tax assets:    
Inventories $ 434 $ 415
Product-related liabilities 48 57
Other accrued expenses 512 221
Depreciation and amortization 1,269 1,363
State income taxes 108 65
Share-based compensation 56 49
Net operating loss carryforwards 373 95
Other 263 207
Total deferred income tax assets 3,063 2,472
Less valuation allowances (203) (75)
Net deferred income tax assets 2,860 2,397
Deferred income tax liabilities:    
Depreciation and amortization (1,286) (893)
Undistributed earnings (161) (37)
Other 0 0
Total deferred income tax liabilities (1,447) (930)
Net deferred income tax assets 1,413 1,467
Noncurrent deferred income tax assets 1,530 1,575
Noncurrent liabilities—Other liabilities $ (117) $ (108)