Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Current Assets [Abstract]
Cash and cash equivalents	$ 17,627	$ 18,954
Marketable securities	7,200	9,222
Restricted cash and marketable securities	1,442	1,338
Accounts and notes receivable, net	10,604	9,078
Inventories	14,218	13,642
Equipment on operating leases, net	5,722	3,564
Deferred income taxes	9,289	9,760
Other current assets	1,520	1,584
Total current assets	84,554	83,670
Non-current Assets [Abstract]
Restricted cash and marketable securities	623	935
Equity in net assets of nonconsolidated affiliates	8,403	8,350
Property, net	28,431	27,743
Goodwill and intangible assets, net	6,181	6,410
Deferred income taxes	24,998	25,414
Other assets	2,441	2,089
Total non-current assets	101,258	94,007
Total Assets	185,812	177,677
Current Liabilities [Abstract]
Accounts payable (principally trade)	24,247	22,529
Accrued liabilities	30,878	28,184
Total current liabilities	69,528	65,701
Non-current Liabilities [Abstract]
Postretirement benefits other than pensions	6,075	6,229
Pensions	22,177	23,788
Other Liabilities	13,248	14,082
Total non-current liabilities	80,614	75,952
Total Liabilities	$ 150,142	$ 141,653
Commitments and contingencies
Equity [Abstract]
Common stock, $0.01 par value	$ 16	$ 16
Additional paid-in capital	28,161	28,937
Retained earnings	14,512	14,577
Accumulated other comprehensive loss	(7,543)	(8,073)
Total stockholders' equity	35,146	35,457
Noncontrolling interests	524	567
Total Equity	35,670	36,024
Total Liabilities and Equity	185,812	177,677
GM Financial [Member]
Current Assets [Abstract]
GM Financial receivables, net, current	16,932	16,528
Non-current Assets [Abstract]
GM Financial receivables, net, noncurrent	17,277	16,006
GM Financial equipment on operating leases, net	12,904	7,060
Current Liabilities [Abstract]
Short-term debt and current portion of long-term debt	13,941	14,488
Non-current Liabilities [Abstract]
Long-term debt	30,389	22,943
Automotive [Member]
Current Liabilities [Abstract]
Short-term debt and current portion of long-term debt	462	500
Non-current Liabilities [Abstract]
Long-term debt	$ 8,725	$ 8,910