Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Income from continuing operations	$ 5,233	$ 7,374
Depreciation, amortization and impairment charges	9,084	7,125
Foreign currency remeasurement and transaction (gains) losses	(12)	143
Undistributed earnings of nonconsolidated affiliates, net	370	400
Pension contributions and OPEB payments	(1,109)	(3,097)
Pension and OPEB income, net	(646)	(587)
Provision for deferred taxes	3,517	2,194
Change in other operating assets and liabilities	(6,061)	(1,271)
Net cash provided by operating activities – continuing operations	10,376	12,281
Net cash provided by operating activities – discontinued operations	64	308
Net cash provided by operating activities	10,440	12,589
Cash flows from investing activities
Expenditures for property	(6,353)	(6,102)
Available-for-sale marketable securities, acquisitions	(4,499)	(8,613)
Trading marketable securities, acquisitions	0	(249)
Available-for-sale marketable securities, liquidations	7,901	8,090
Trading marketable securities, liquidations	0	846
Acquisition of companies/investments, net of cash acquired	(5)	(802)
Purchases of finance receivables, net	(15,134)	(10,389)
Principal collections and recoveries on finance receivables	9,363	7,368
Purchases of leased vehicles, net	(14,809)	(14,959)
Proceeds from termination of leased vehicles	4,649	1,799
Other investing activities	98	200
Net cash used in investing activities – continuing operations	(18,789)	(22,811)
Net cash used in investing activities – discontinued operations (Note 2)	(3,972)	(1,188)
Net cash used in investing activities	(22,761)	(23,999)
Cash flows from financing activities
Net decrease in short-term debt	(374)	(289)
Proceeds from issuance of debt (original maturities greater than three months)	43,048	30,598
Payments on debt (original maturities greater than three months)	(26,034)	(15,294)
Payments to purchase common stock	(2,994)	(1,501)
Proceeds from issuance of GM Financial preferred stock	985	0
Dividends paid	(1,701)	(1,782)
Other financing activities	(271)	(172)
Net cash provided by financing activities – continuing operations	12,659	11,560
Net cash provided by financing activities – discontinued operations	20	585
Net cash provided by financing activities	12,679	12,145
Effect of exchange rate changes on cash, cash equivalents and restricted cash	362	52
Net increase in cash, cash equivalents and restricted cash	720	787
Cash, cash equivalents and restricted cash at beginning of period	15,160	17,332
Cash, cash equivalents and restricted cash at end of period	15,880	18,119
Significant Non-cash Investing and Financing Activity
Non-cash proceeds on sale of discontinued operations (Note 2)	808	0
Continuing Operations [Member]
Cash flows from financing activities
Cash, cash equivalents and restricted cash at end of period	15,315	17,392
Significant Non-cash Investing and Financing Activity
Non-cash property additions	3,833	3,841
Non-cash business acquisition – continuing operations (Note 18)	0	290
Discontinued Operations [Member]
Cash flows from financing activities
Cash, cash equivalents and restricted cash at end of period	565	727
Significant Non-cash Investing and Financing Activity
Non-cash property additions	$ 0	$ 847