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)

Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. This amount represent the portion of basis difference attributable to fair value changes of the investees.

No definition available.