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Equity In Net Assets of Nonconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity income	$ 315	$ 530	$ 1,000	$ 1,815
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Dividends declared but not paid	580		580
Dividends received	303		1,200	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	282	485	$ 893	1,674
Change in ownership percentage			0.00%
Net sales	9,695	11,461	$ 28,843	37,781
Net income	455	999	1,721	3,370
Other joint ventures equity income [Member]
Schedule of Equity Method Investments [Line Items]
Equity income	$ 33	$ 45	$ 107	$ 141

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