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GM Financial Receivables Summary of Finance Receivables (Details) - GM Financial [Member] - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2015
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Finance Receivables [Line Items] |  |  |  |
Finance receivables, collectively evaluated for impairment, net of fees | $ 45,305 | $ 41,641 |  |
Finance receivables, individually evaluated for impairment, net of fees | 2,044 | 1,991 |  |
GM Financial receivables | 47,349 | 43,632 |  |
Less: allowance for loan losses | (906) | (843) | $ (843) | $ (782)
GM Financial receivables, net | 46,443 | 42,789 |  |
Fair value of GM Financial receivables | 46,255 | 42,739 |  |
Retail Finance Receivables [Member] |  |  |  |
Finance Receivables [Line Items] |  |  |  |
Finance receivables, collectively evaluated for impairment, net of fees | 33,919 | 30,989 |  |
Finance receivables, individually evaluated for impairment, net of fees | 1,957 | 1,921 |  |
GM Financial receivables | 35,876 | 32,910 |  |
Less: allowance for loan losses | (852) | (793) |  |
GM Financial receivables, net | 35,024 | 32,117 |  |
Commercial Finance Receivables [Member] |  |  |  |
Finance Receivables [Line Items] |  |  |  |
Finance receivables, collectively evaluated for impairment, net of fees | 11,386 | 10,652 |  |
Finance receivables, individually evaluated for impairment, net of fees | 87 | 70 |  |
GM Financial receivables | 11,473 | 10,722 |  |
Less: allowance for loan losses | (54) | (50) |  |
GM Financial receivables, net | $ 11,419 | $ 10,672 |  |

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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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