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Equity In Net Assets of Nonconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity income	$ 271	$ 637	$ 685	$ 1,285
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Dividends declared but not paid	865		865
Dividends received	941	2,000	941	2,000
Undistributed earnings	2,100		2,100		$ 2,300
Automotive China JVs equity income [Member]
Schedule of Equity Method Investments [Line Items]
Equity income	235	592	$ 611	1,189
Change in ownership percentage			0.00%
Net sales	9,002	12,601	$ 19,148	26,320
Net income	499	1,194	1,266	2,371
Other joint ventures equity income [Member]
Schedule of Equity Method Investments [Line Items]
Equity income	$ 36	$ 45	$ 74	$ 96

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