Segment Information (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Segment Information [Line Items]
Number of Operating Segments									4
Total revenues	$ 38,654	$ 35,943	$ 39,485	$ 37,718	$ 40,251	$ 38,144	$ 37,263	$ 33,900	$ 151,800	$ 149,558	$ 144,077
Pre-tax results - income/(loss)	(1,117)	$ 1,387	$ 2,875	$ 3,651	1,896	$ 3,291	$ 3,286	$ 1,779	6,796	10,252	1,234
Depreciation and tooling amortization									9,023	7,993	7,385
Interest expense									3,702	3,227	3,496
Investment-related interest income									291	309	244
Equity in net income/(loss) of affiliated companies									1,780	1,818	1,275
Cash outflow for capital spending									6,992	7,196	7,463
Cash, cash equivalents, and marketable securities	38,827				35,176				38,827	35,176	31,150
Total assets	237,951				224,925				237,951	224,925	208,615
Debt	142,970				132,854				142,970	132,854	119,171
Net cash flows from non-designated derivatives									(825)	(134)	(281)
Operating cash flows									$ 19,792	16,170	14,507
Operating Segments [Member] | Automotive
Segment Information [Line Items]
Number of Regional Business Units									5
Total revenues									$ 141,546	140,566	135,782
Pre-tax results - income/(loss)									9,422	9,568	6,254
Depreciation and tooling amortization									4,667	4,332	4,252
Investment-related interest income									75	42	53
Equity in net income/(loss) of affiliated companies									1,747	1,786	1,575
Cash outflow for capital spending									6,947	7,147	7,360
Cash, cash equivalents, and marketable securities	27,462				23,567				27,462	23,567	21,702
Total assets	96,929				91,959				96,929	91,959	90,167
Debt	15,907				12,839				15,907	12,839	13,824
Net cash flows from non-designated derivatives									(610)	76	(247)
Funded pension contributions									(1,155)	(1,115)	(1,466)
Other									(186)	(486)	(223)
Operating cash flows									6,385	7,285	3,563
Operating Segments [Member] | Automotive | Employee Severance [Member]
Segment Information [Line Items]
Separation payments									(336)	(613)	(223)
Operating Segments [Member] | Financial Services
Segment Information [Line Items]
Total revenues									10,253	8,992	8,295
Pre-tax results - income/(loss)									1,820	2,028	1,794
Depreciation and tooling amortization									4,356	3,661	3,133
Interest expense									2,808	2,454	2,699
Investment-related interest income									74	76	51
Equity in net income/(loss) of affiliated companies									33	32	29
Cash outflow for capital spending									45	49	103
Cash, cash equivalents, and marketable securities	11,357				11,609				11,357	11,609	9,448
Total assets	146,252				137,026				146,252	137,026	121,388
Debt	127,063				120,015				127,063	120,015	105,347
Operating cash flows									$ 8,754	3,876	5,743
Operating Segments [Member] | All Other (Other operating segments)
Segment Information [Line Items]
Number of Operating Segments									2
Total revenues									$ 1
Pre-tax results - income/(loss)									(867)	(796)	(755)
Interest expense									894	773	797
Investment-related interest income									142	191	140
Cash, cash equivalents, and marketable securities	8								8
Total assets	69								69
Operating cash flows									(7)
Special Items (Corporate, Non-Segment) [Member]
Segment Information [Line Items]
Pre-tax results - income/(loss)									(3,579)	(548)	(6,059)
Equity in net income/(loss) of affiliated companies											(329)
Adjustments (Segment Reconciling Items) [Member]
Segment Information [Line Items]
Total assets	$ (5,299)				$ (4,060)				(5,299)	(4,060)	(2,940)
Operating cash flows									$ 4,660	$ 5,009	$ 5,201