Supplemental Information for the Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts receivable	$ (563)	$ 492	$ 1,402
Wholesale receivables funded by GM Financial, net	663	(2,606)	(2,099)
Inventories	(761)	399	440
Automotive equipment on operating leases	274	748	(263)
Change in other assets	(1,550)	(529)	108
Accounts payable	(492)	(537)	(362)
Income taxes payable	213	(75)	(3)
Accrued and other liabilities	(1,573)	732	(2,238)
Total	(3,789)	(1,376)	(3,015)
Cash paid for income taxes and interest
Cash paid for income taxes, net	689	660	656
Cash Paid for Interest (net of amounts capitalized)	4,214	3,597	3,072
Automotive
Cash paid for income taxes and interest
Cash Paid for Interest (net of amounts capitalized)	739	656	501
GM Financial
Cash paid for income taxes and interest
Cash Paid for Interest (net of amounts capitalized)	$ 3,475	$ 2,941	$ 2,571