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Automotive and GM Financial Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Interest expense |
| Years Ended December 31,
| 2017 |  | 2016 |  | 2015
Automotive interest expense | $ | 575 |  |  | $ | 563 |  |  | $ | 423 |
Automotive Financing - GM Financial interest expense | 2,566 |  |  | 1,972 |  |  | 1,460 |
Total interest expense | $ | 3,141 |  |  | $ | 2,535 |  |  | $ | 1,883 |
Schedule of maturities of long-term debt | The following table summarizes contractual maturities including capital leases at December 31, 2017:
| Automotive |  | Automotive Financing(a) |  | Total
2018 | $ | 2,528 |  |  | $ | 24,502 |  |  | $ | 27,030 |
2019 | 154 |  |  | 18,489 |  |  | 18,643 |
2020 | 586 |  |  | 14,696 |  |  | 15,282 |
2021 | 59 |  |  | 7,802 |  |  | 7,861 |
2022 | 63 |  |  | 5,323 |  |  | 5,386 |
Thereafter | 10,611 |  |  | 10,477 |  |  | 21,088 |
| $ | 14,001 |  |  | $ | 81,289 |  |  | $ | 95,290 |
________
(a) | Secured debt, credit facilities and other unsecured debt are based on expected payoff date. Senior notes principal amounts are based on maturity.
Automotive [Member] |
Debt carrying amount and fair value |
| December 31, 2017 |  | December 31, 2016
Secured debt | $ | 204 |  |  | $ | 108 |
Unsecured debt | 12,579 |  |  | 9,742 |
Capital leases | 719 |  |  | 710 |
Total automotive debt(a) | $ | 13,502 |  |  | $ | 10,560 |
Fair value utilizing Level 1 inputs | $ | 13,202 |  |  | $ | 9,515 |
Fair value utilizing Level 2 inputs | 1,886 |  |  | 1,884 |
Fair value of automotive debt | $ | 15,088 |  |  | $ | 11,399 |
Available under credit facility agreements | $ | 14,067 |  |  | $ | 14,181 |
Interest rate range on outstanding debt(b) | 0.0-21.8% |  |  | 0.0-18.0% |
Weighted-average interest rate on outstanding short-term debt(b) | 4.7 | % |  | 10.7 | %
Weighted-average interest rate on outstanding long-term debt(b) | 5.2 | % |  | 5.2 | %
__________
(a) | Includes net discount and debt issuance costs of $499 million and $491 million at December 31, 2017 and 2016.
(b) | Includes coupon rates on debt denominated in various foreign currencies and interest free loans and the impact of reclassification of $1.5 billion of senior unsecured notes from long-term to short-term in the year ended December 31, 2017.
GM Financial [Member] |
Debt carrying amount and fair value |
| December 31, 2017 |  | December 31, 2016
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Secured debt | $ | 39,887 |  |  | $ | 39,948 |  |  | $ | 35,087 |  |  | $ | 35,162 |
Unsecured debt | 40,830 |  |  | 41,989 |  |  | 29,476 |  |  | 30,045 |
Total GM Financial debt | $ | 80,717 |  |  | $ | 81,937 |  |  | $ | 64,563 |  |  | $ | 65,207 |
Fair value utilizing Level 2 inputs |  |  | $ | 79,623 |  |  |  |  | $ | 62,951 |
Fair value utilizing Level 3 inputs |  |  | $ | 2,314 |  |  |  |  | $ | 2,256 |

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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