Condensed Consolidated Income Statements - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net sales and revenue
Automotive	$ 29,150	$ 31,261
Total net sales and revenue (Note 3)	32,709	34,878
Costs and expenses
Total costs and expenses	32,052	33,634
Operating income	657	1,244
Interest income and other non-operating income, net	311	805
Equity income (loss) (Note 8)	(132)	414
Income before income taxes	643	2,282
Income tax expense (Note 16)	357	137
Net income	286	2,145
Net loss attributable to noncontrolling interests	8	12
Net income attributable to stockholders	294	2,157
Net income attributable to common stockholders	$ 247	$ 2,119
Earnings per share (Note 19)
Basic earnings per common share (in dollars per share)	$ 0.17	$ 1.50
Weighted-average common shares outstanding - basic (in shares)	1,433	1,417
Diluted earnings per common share (in dollars per share)	$ 0.17	$ 1.48
Weighted-average common shares outstanding - diluted (in shares)	1,440	1,436
Dividends declared per common share (in dollars per share)	$ 0.38	$ 0.38
Automotive [Member]
Net sales and revenue
Automotive	$ 29,150	$ 31,261
Costs and expenses
Automotive and other cost of sales	26,726	28,229
Automotive and other selling, general and administrative expense	1,970	2,099
Automotive interest expense	193	181
GM Financial [Member]
Net sales and revenue
Total net sales and revenue (Note 3)	3,559	3,617
Costs and expenses
GM Financial interest, operating and other expenses	$ 3,356	$ 3,306