Condensed Consolidated Income Statements - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net sales and revenue
Total net sales and revenue (Note 2)	$ 35,473	$ 35,791	$ 106,411	$ 108,650
Costs and expenses
Total costs and expenses	33,169	34,181	100,376	105,034
Operating income	2,304	1,610	6,035	3,616
Interest income and other non-operating income, net	169	651	1,338	2,130
Equity income (Note 7)	315	530	1,000	1,815
Income before income taxes	2,582	2,630	7,791	7,091
Income tax expense (Note 14)	271	100	932	1,085
Income from continuing operations	2,311	2,530	6,859	6,006
Loss from discontinued operations, net of tax (Note 18)	0	0	0	70
Net income	2,311	2,530	6,859	5,936
Net loss attributable to noncontrolling interests	40	4	67	34
Net income attributable to stockholders	2,351	2,534	6,926	5,970
Net income attributable to common stockholders	$ 2,313	$ 2,503	$ 6,813	$ 5,910
Earnings per share (Note 17)
Basic earnings per common share – continuing operations (in dollars per share)	$ 1.62	$ 1.77	$ 4.79	$ 4.24
Basic loss per common share – discontinued operations (in dollars per share)	0	0	0	0.05
Basic earnings per common share (in dollars per share)	$ 1.62	$ 1.77	$ 4.79	$ 4.19
Weighted-average common shares outstanding - basic (in shares)	1,428	1,412	1,422	1,410
Diluted earnings per common share – continuing operations (in dollars per share)	$ 1.60	$ 1.75	$ 4.74	$ 4.18
Diluted loss per common share – discontinued operations (in dollars per share)	0	0	0	0.05
Diluted earnings per common share (in dollars per share)	$ 1.60	$ 1.75	$ 4.74	$ 4.13
Weighted-average common shares outstanding - diluted (in shares)	1,442	1,431	1,439	1,431
Dividends declared per common share (in dollars per share)	$ 0.38	$ 0.38	$ 1.14	$ 1.14
Automotive [Member]
Net sales and revenue
Automotive	$ 31,817	$ 32,276	$ 95,503	$ 98,242
Costs and expenses
Automotive and other cost of sales	28,174	28,533	84,730	88,788
Automotive and other selling, general and administrative expense	2,008	2,584	6,209	7,172
Automotive interest expense	206	161	582	470
GM Financial [Member]
Net sales and revenue
Total net sales and revenue (Note 2)	3,656	3,515	10,908	10,408
Costs and expenses
GM Financial interest, operating and other expenses	$ 2,987	$ 3,064	$ 9,437	$ 9,074