Equity In Net Assets of Nonconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Equity income	$ 530	$ 660	$ 1,085	$ 1,220
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Dividends received	1,600	1,900	1,600	2,000
Undistributed earnings	1,700		1,700		$ 2,200
Automotive China JVs equity income [Member]
Schedule of Equity Method Investments [Line Items]
Equity income	509	471	$ 1,013	989
Change in ownership percentage			0.00%
Automotive China JVs' net sales	10,815	10,281	$ 22,016	21,472
Automotive China JVs' net income	902	979	1,948	2,065
Other joint ventures equity income [Member]
Schedule of Equity Method Investments [Line Items]
Equity income	$ 21	$ 189	$ 72	$ 231