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Nature of Operations and Basis of Presentation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Mar. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
Income Statement |  |  |  |  |  |  |
Automotive net sales and revenue | $ 33,275 | $ 33,998 | $ 65,966 | $ 68,517 |  |  |
Automotive and other cost of sales | 30,071 | 29,535 | 60,255 | 59,296 |  |  |
Income before income taxes | 2,885 | 2,967 | 4,461 | 6,440 |  |  |
Net income attributable to stockholders | 2,390 | $ 1,660 | 3,436 | $ 4,268 |  |  |
Balance Sheet |  |  |  |  |  |  |
Equipment on operating leases, net (Note 7; Note 9 at VIEs) | 44,054 |  | 44,054 |  |  |  | $ 42,882
Deferred income taxes | 23,285 |  | 23,285 |  |  | $ 23,925 | 23,544
Other assets | 5,344 |  | 5,344 |  |  | 5,366 | 4,929
Accrued liabilities | 27,368 |  | 27,368 |  |  | 28,324 | 25,996
Other liabilities | 11,876 |  | 11,876 |  |  | 12,159 | 12,394
Retained earnings | 18,873 |  | 18,873 |  |  | 16,581 | 17,627
Accumulated other comprehensive loss | (8,171) |  | (8,171) |  |  | (8,109) | (8,011)
GM Financial [Member] |  |  |  |  |  |  |
Balance Sheet |  |  |  |  |  |  |
GM Financial short-term debt and current portion of long-term debt | 25,457 |  | 25,457 |  |  | 24,437 | $ 24,450
Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |
Income Statement |  |  |  |  |  |  |
Automotive net sales and revenue | 33,275 |  | 65,966 |  |  |  |
Automotive and other cost of sales | 30,071 |  | 60,255 |  |  |  |
Income before income taxes | 2,885 |  | 4,461 |  |  |  |
Net income attributable to stockholders | 2,390 |  | 3,436 |  |  |  |
Balance Sheet |  |  |  |  |  |  |
Equipment on operating leases, net (Note 7; Note 9 at VIEs) | 690 |  | 690 |  |  |  |
Deferred income taxes | 23,285 |  | 23,285 |  |  | 444 |
Other assets |  |  |  |  |  | 195 |
Accrued liabilities | 27,368 |  | 27,368 |  |  | 2,328 |
Other liabilities | 11,876 |  | 11,876 |  |  | (235) |
Retained earnings | 18,873 |  | 18,873 |  |  | (1,336) |
Accumulated other comprehensive loss |  |  |  |  |  | 0 |
Accounting Standards Update 2014-09 [Member] | GM Financial [Member] |  |  |  |  |  |  |
Balance Sheet |  |  |  |  |  |  |
GM Financial short-term debt and current portion of long-term debt |  |  |  |  |  | 0 |
Accounting Standards Update 2016-01 [Member] |  |  |  |  |  |  |
Newly Adopted Accounting Standard, Modified Retrospective Basis [Abstract] |  |  |  |  |  |  |
Cumulative effect adjustment |  |  |  |  |  | 182 |
Accounting Standards Update 2017-12 and Accounting Standards Update 2018-02 [Member] |  |  |  |  |  |  |
Newly Adopted Accounting Standard, Modified Retrospective Basis [Abstract] |  |  |  |  |  |  |
Cumulative effect adjustment |  |  |  |  | $ 108 |  |
Accounting Standards Update 2016-01, Accounting Standards Update 2017-12 and Accounting Standards Update 2018-02 [Member] |  |  |  |  |  |  |
Balance Sheet |  |  |  |  |  |  |
Deferred income taxes |  |  |  |  |  | (63) |
Other assets |  |  |  |  |  | 242 |
Accrued liabilities |  |  |  |  |  | 0 |
Other liabilities |  |  |  |  |  | 0 |
Retained earnings |  |  |  |  |  | 290 |
Accumulated other comprehensive loss |  |  |  |  |  | (98) |
Accounting Standards Update 2016-01, Accounting Standards Update 2017-12 and Accounting Standards Update 2018-02 [Member] | GM Financial [Member] |  |  |  |  |  |  |
Balance Sheet |  |  |  |  |  |  |
GM Financial short-term debt and current portion of long-term debt |  |  |  |  |  | $ (13) |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |
Income Statement |  |  |  |  |  |  |
Automotive net sales and revenue | (168) |  | 964 |  |  |  |
Automotive and other cost of sales | 311 |  | 1,030 |  |  |  |
Income before income taxes | (324) |  | 121 |  |  |  |
Net income attributable to stockholders | (239) |  | 105 |  |  |  |
Balance Sheet |  |  |  |  |  |  |
Equipment on operating leases, net (Note 7; Note 9 at VIEs) | (988) |  | (988) |  |  |  |
Deferred income taxes | 427 |  | 427 |  |  |  |
Accrued liabilities | 1,426 |  | 1,426 |  |  |  |
Other liabilities | (406) |  | (406) |  |  |  |
Retained earnings | (1,231) |  | (1,231) |  |  |  |
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |  |  |
Income Statement |  |  |  |  |  |  |
Automotive net sales and revenue | 33,443 |  | 65,002 |  |  |  |
Automotive and other cost of sales | 29,760 |  | 59,225 |  |  |  |
Income before income taxes | 3,209 |  | 4,340 |  |  |  |
Net income attributable to stockholders | 2,629 |  | 3,331 |  |  |  |
Balance Sheet |  |  |  |  |  |  |
Equipment on operating leases, net (Note 7; Note 9 at VIEs) | 1,678 |  | 1,678 |  |  |  |
Deferred income taxes | 22,858 |  | 22,858 |  |  |  |
Accrued liabilities | 25,942 |  | 25,942 |  |  |  |
Other liabilities | 12,282 |  | 12,282 |  |  |  |
Retained earnings | $ 20,104 |  | $ 20,104 |  |  |  |

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