Supplemental Information for the Consolidated Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts Receivable	$ (1,285)	$ (254)	$ (1,248)
Wholesale receivables funded by GM Financial, net	(2,723)	(1,124)	(2,000)
Inventories	(320)	(1,350)	(309)
Automotive Equipment on Operating Leases	492	159	(1,949)
Change in Other Assets	(859)	(668)	(210)
Accounts Payable	3,469	1,953	19
Income Taxes Payable	(227)	60	(145)
Accrued and Other Liabilities	1,015	(801)	6,089
Total	(438)	(2,025)	247
Cash Paid for Income Taxes and Interest
Cash Paid for Income Taxes	757	800	947
Cash Paid for Interest (net of amounts capitalized)	2,323	1,643	1,421
Automotive [Member]
Cash Paid for Income Taxes and Interest
Cash Paid for Interest (net of amounts capitalized)	466	348	301
GM Financial [Member]
Cash Paid for Income Taxes and Interest
Cash Paid for Interest (net of amounts capitalized)	$ 1,857	$ 1,295	$ 1,120