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Derivative Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2018
Derivative [Line Items] |
Schedule of Cumulative Basis Adjustments for Fair Value Hedges | The following amounts were recorded in the condensed consolidated balance sheet related to items designated and qualifying as hedged items in fair value hedging relationships:
| March 31, 2018
| Carrying Amount of Hedged Items |  | Cumulative Amount of Fair Value Hedging Adjustments(a)
GM Financial long-term debt | $ | 13,672 |  |  | $ | 602 |
__________
(a) | Includes $163 million of hedging adjustments remaining on hedged items for which hedge accounting has been discontinued.
Automotive [Member] |
Derivative [Line Items] |
Schedule of Notional Amounts for Derivative Financial Instruments | The following table presents the notional amounts based on asset or liability positions of derivative financial instruments in our automotive operations:
| Fair Value Level |  | March 31, 2018 |  | December 31, 2017
Derivatives not designated as hedges(a) |  |  |  |  |
Assets |  |  |  |  |
Foreign currency | 2 |  | $ | 2,984 |  |  | $ | 2,834 |
Commodity | 2 |  | 418 |  |  | 606 |
PSA warrants(b) | 2 |  | 49 |  |  | 48 |
Total assets |  |  | $ | 3,451 |  |  | $ | 3,488 |
Liabilities |  |  |  |  |  |  |
Foreign currency | 2 |  | $ | 2,102 |  |  | $ | 1,188 |
__________
(a) | The fair value of these derivative instruments at March 31, 2018 and December 31, 2017 and the gains/losses included in our condensed consolidated income statements for the three months ended March 31, 2018 and 2017 were insignificant, unless otherwise noted.
(b) | The fair value of the PSA warrants located in Other assets was $909 million and $764 million at March 31, 2018 and December 31, 2017.
GM Financial [Member] |
Derivative [Line Items] |
Schedule of Notional Amounts for Derivative Financial Instruments | The following table presents the notional amounts based on asset or liability positions of GM Financial's derivative financial instruments:
| Fair Value Level |  | March 31, 2018 |  | December 31, 2017
Derivatives designated as hedges(a) |  |  |  |  |
Assets |  |  |  |  |
Fair value hedges – interest rate contracts | 2 |  | $ | 833 |  |  | $ | 1,250 |
Cash flow hedges |  |  |  |  |  |  |
Interest rate contracts | 2 |  | 1,794 |  |  | 2,177 |
Foreign currency | 2 |  | 1,413 |  |  | 1,574 |
Total cash flow hedges |  |  | 3,207 |  |  | 3,751 |
Total assets |  |  | $ | 4,040 |  |  | $ | 5,001 |
Liabilities |  |  |  |  |  |  |
Fair value hedges – interest rate contracts(b)(c) | 2 |  | $ | 8,947 |  |  | $ | 9,860 |
Cash flow hedges – foreign currency | 2 |  | 815 |  |  | — |
Total liabilities |  |  | $ | 9,762 |  |  | $ | 9,860 |
Derivatives not designated as hedges(a) |  |  |  |  |
Assets |  |  |  |  |
Interest rate contracts(d) | 2 |  | $ | 51,310 |  |  | $ | 55,581 |
Foreign currency | 2 |  | 1,230 |  |  | 1,201 |
Total assets |  |  | $ | 52,540 |  |  | $ | 56,782 |
Liabilities |  |  |  |  |
Interest rate contracts(c)(e) | 2 |  | $ | 39,896 |  |  | $ | 26,357 |
Foreign currency | 2 |  | 738 |  |  | — |
Total liabilities |  |  | $ | 40,634 |  |  | $ | 26,357 |
__________
(a) | The fair value of these derivative instruments at March 31, 2018 and December 31, 2017 and the gains/losses included in our condensed consolidated income statements and statements of comprehensive income for the three months ended March 31, 2018 and 2017 were insignificant, unless otherwise noted.
(b) | The fair value of these derivative instruments located in Other liabilities was $396 million and $290 million at March 31, 2018 and December 31, 2017.
(c) | Amounts accrued for interest payments in a net receivable position are included in Other assets.
(d) | The fair value of these derivative instruments located in Other assets was $464 million and $329 million at March 31, 2018 and December 31, 2017.
(e) | The fair value of these derivative instruments located in Other liabilities was $514 million and $207 million at March 31, 2018 and December 31, 2017.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure for fair value hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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