Segment Reporting (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net sales and revenue	$ 47,969		$ 44,746		$ 90,983	$ 84,732
Earnings (loss) before interest and taxes-adjusted	4,438		3,234		8,310	7,037
Adjustments	(761)		(170)		(857)	(1,144)
Net income (loss) attributable to noncontrolling interest	(57)		(59)		(83)	(109)
Income (loss) before income taxes	3,643		3,029		7,359	5,803
Income tax benefit (expense)	(767)		(522)		(1,529)	(950)
Net income (loss)	2,877	$ 2,953	2,507	$ 2,346	5,830	4,853
Net income (loss) attributable to stockholders	2,933		2,566		5,913	4,962
Equity in net assets of nonconsolidated affiliates	10,734		10,064		10,734	10,064	$ 10,613
Goodwill and intangibles	4,778		4,950		4,778	4,950	4,862
Total assets	282,956		275,833		282,956	275,833	$ 273,064
Depreciation and amortization	2,880		2,936		5,678	5,746
Impairment charges	605		0		605	0
Equity income (loss)	240		145		291	220
Automotive
Segment Reporting Information [Line Items]
Automotive interest income	229		251		414	479
Automotive interest expense	(206)		(226)		(425)	(460)
Operating Segments | Automotive
Segment Reporting Information [Line Items]
Net sales and revenue	44,060		41,254		83,272	77,900
Earnings (loss) before interest and taxes-adjusted	4,082		3,083		7,667	6,678
Adjustments	(178)		(170)		(274)	(1,144)
Equity in net assets of nonconsolidated affiliates	9,059		8,397		9,059	8,397
Goodwill and intangibles	2,717		2,869		2,717	2,869
Total assets	147,144		145,572		147,144	145,572
Depreciation and amortization	1,682		1,680		3,221	3,235
Impairment charges	0		0		0	0
Equity income (loss)	227		108		245	142
Operating Segments | GMNA | Automotive
Segment Reporting Information [Line Items]
Net sales and revenue	40,725		37,220		76,824	70,108
Earnings (loss) before interest and taxes-adjusted	4,433		3,194		8,273	6,769
Adjustments	(75)		(246)		(171)	(1,220)
Equity in net assets of nonconsolidated affiliates	3,357		2,256		3,357	2,256
Goodwill and intangibles	2,025		2,141		2,025	2,141
Total assets	163,099		150,624		163,099	150,624
Depreciation and amortization	1,515		1,531		2,924	2,959
Impairment charges	0		0		0	0
Equity income (loss)	330		31		457	(15)
Operating Segments | GMI | Automotive
Segment Reporting Information [Line Items]
Net sales and revenue	3,298		3,955		6,380	7,682
Earnings (loss) before interest and taxes-adjusted	50		236		40	583
Adjustments	(103)		76		(103)	76
Equity in net assets of nonconsolidated affiliates	5,701		6,142		5,701	6,142
Goodwill and intangibles	692		724		692	724
Total assets	25,867		24,509		25,867	24,509
Depreciation and amortization	147		144		272	266
Impairment charges	0		0		0	0
Equity income (loss)	(103)		77		(211)	157
Operating Segments | Cruise
Segment Reporting Information [Line Items]
Net sales and revenue	25		26		51	51
Earnings (loss) before interest and taxes-adjusted	(458)		(611)		(900)	(1,172)
Adjustments	(583)		0		(583)	0
Equity in net assets of nonconsolidated affiliates	0		0		0	0
Goodwill and intangibles	714		727		714	727
Total assets	3,882		5,089		3,882	5,089
Depreciation and amortization	7		10		12	15
Impairment charges	605		0		605	0
Equity income (loss)	0		0		0	0
Operating Segments | GM Financial
Segment Reporting Information [Line Items]
Net sales and revenue	3,918		3,498		7,730	6,841
Earnings (loss) before interest and taxes-adjusted	822		766		1,559	1,537
Adjustments	0		0		0	0
Equity in net assets of nonconsolidated affiliates	1,675		1,667		1,675	1,667
Goodwill and intangibles	1,346		1,354		1,346	1,354
Total assets	135,902		127,175		135,902	127,175
Depreciation and amortization	1,192		1,245		2,445	2,496
Impairment charges	0		0		0	0
Equity income (loss)	14		37		45	78
Corporate | Automotive
Segment Reporting Information [Line Items]
Net sales and revenue	37		79		68	110
Earnings (loss) before interest and taxes-adjusted	(401)		(347)		(645)	(674)
Adjustments	0		0		0	0
Equity in net assets of nonconsolidated affiliates	0		0		0	0
Goodwill and intangibles	0		4		0	4
Total assets	41,356		44,892		41,356	44,892
Depreciation and amortization	20		5		25	10
Impairment charges	0		0		0	0
Equity income (loss)	0		0		0	0
Eliminations
Segment Reporting Information [Line Items]
Net sales and revenue	(35)		(31)		(69)	(60)
Earnings (loss) before interest and taxes-adjusted	(8)		(4)		(16)	(6)
Adjustments	0		0		0	0
Equity in net assets of nonconsolidated affiliates	0		0		0	0
Goodwill and intangibles	0		0		0	0
Total assets	(3,972)		(2,003)		(3,972)	(2,003)
Depreciation and amortization	0		0		0	0
Impairment charges	0		0		0	0
Equity income (loss)	0		0		0	0
Eliminations | Automotive
Segment Reporting Information [Line Items]
Equity in net assets of nonconsolidated affiliates	0		0		0	0
Goodwill and intangibles	0		0		0	0
Total assets	(83,178)		(74,453)		(83,178)	(74,453)
Depreciation and amortization	0		0		0	0
Impairment charges	0		0		0	0
Equity income (loss)	$ 0		$ 0		$ 0	$ 0