Segment Reporting Revenues and long-lived assets by geographic region (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									$ 152,092	$ 150,295	$ 148,866
Financial Services Revenue									3,335	1,961	1,410
Revenues	40,485	38,983	39,075	36,884	39,307	37,576	37,614	37,759	155,427	152,256	150,276
Long-Lived Assets	31,648				27,647				31,648	27,647	26,277
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									88,784	85,105	79,868
Financial Services Revenue									2,233	1,832	1,363
Non-U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									63,308	65,190	68,998
Financial Services Revenue									1,102	129	47
Maximum percent of total net sales and revenues in an individual country									10.00%	10.00%	10.00%
Maximum percent of total long-lived assets in an individual country	10.00%				10.00%				10.00%	10.00%	10.00%
Automotive [Member] | U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	15,844				13,520				15,844	13,520	11,736
Automotive [Member] | Non-U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	12,289				12,425				12,289	12,425	13,709
GM Financial [Member] | U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	2,472				1,112				2,472	1,112	532
GM Financial [Member] | Non-U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 1,043				$ 590				$ 1,043	$ 590	$ 300