GM Financial Receivables and Transactions - Intercompany Transactions (Details) - GM Financial - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transactions [Line Items]
Financing receivable	$ 84,119	$ 74,214
Common stock dividends declared and paid	1,800	1,700	$ 3,500
Commercial Portfolio Segment
Related Party Transactions [Line Items]
Financing receivable	13,698	10,954
Retail Finance Receivables
Related Party Transactions [Line Items]
Financing receivable	70,421	63,260
Eliminations/ Reclassifications
Related Party Transactions [Line Items]
Subvention receivable	508	469
Interest subvention earned on finance receivables	1,234	984	820
Leased vehicle subvention earned	1,537	1,916	2,702
Cash payments to GM Financial	3,500	2,400	$ 3,300
Eliminations/ Reclassifications | Cruise
Related Party Transactions [Line Items]
Financing receivable	353	113
Eliminations/ Reclassifications | Commercial Portfolio Segment
Related Party Transactions [Line Items]
Financing receivable	164	187
Commercial loan funding payable	$ 55	$ 105