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Income Taxes Pre-tax Income and Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Contingency [Line Items] |  |  |
Income before income taxes and equity income | $ 6,386 | $ 9,731 | $ 9,726
Current income tax expense (benefit) |  |  |
U.S. federal | (104) | 18 | (126)
U.S. state and local | 113 | 83 | 65
Non-U.S. | 577 | 552 | 572
Total current income tax expense | 586 | 653 | 511
Deferred income tax expense (benefit) |  |  |
U.S. federal | (578) | 7,831 | 1,865
U.S. state and local | 250 | (187) | 264
Non-U.S. | 216 | 3,236 | 99
Total deferred income tax expense (benefit) | (112) | 10,880 | 2,228
Total income tax expense | 474 | 11,533 | 2,739
Basis differences from reinvested earnings | 2,900 | 2,800 |
China JVs [Member] |  |  |
Deferred income tax expense (benefit) |  |  |
Additional basis differences | 4,100 | 4,100 |
U.S. [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Income before income taxes and equity income | 4,433 | 8,399 | 9,989
Non-U.S. [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Income before income taxes and equity income | $ 1,953 | $ 1,332 | $ (263)

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