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Debt and Capital Lease Obligations (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt and Capital Lease Obligations [Abstract] |
Debt and capital lease obligations | Debt, at stated values, and capital lease obligations consisted of the following (in millions):
| Final Maturity |  | December 31,
|  | 2017 |  | 2016
Bank credit facilities: |  |  |  |  |
Valero Revolver | 2020 |  | $ | — |  |  | $ | — |
VLP Revolver | 2020 |  | 410 |  |  | 30 |
Canadian Revolver | 2018 |  | — |  |  | — |
Accounts receivable sales facility | 2018 |  | 100 |  |  | 100 |
Non-bank debt: |  |  |  |  |
Valero Senior Notes |  |  |  |  |
6.625% | 2037 |  | 1,500 |  |  | 1,500 |
3.4% | 2026 |  | 1,250 |  |  | 1,250 |
6.125% | 2020 |  | 850 |  |  | 850 |
9.375% | 2019 |  | 750 |  |  | 750 |
7.5% | 2032 |  | 750 |  |  | 750 |
4.9% | 2045 |  | 650 |  |  | 650 |
3.65% | 2025 |  | 600 |  |  | 600 |
10.5% | 2039 |  | 250 |  |  | 250 |
8.75% | 2030 |  | 200 |  |  | 200 |
7.45% | 2097 |  | 100 |  |  | 100 |
6.75% | 2037 |  | 24 |  |  | 24 |
VLP Senior Notes, 4.375% | 2026 |  | 500 |  |  | 500 |
Gulf Opportunity Zone Revenue Bonds, Series 2010, 4.0% | 2040 |  | 300 |  |  | 300 |
Debenture, 7.65% | 2026 |  | 100 |  |  | 100 |
Other debt | 2023 |  | 49 |  |  | 51 |
Net unamortized debt issuance costs and other |  |  | (73 | ) |  | (79 | )
Total debt |  |  | 8,310 |  |  | 7,926 |
Capital lease obligations |  |  | 562 |  |  | 75 |
Total debt and capital lease obligations |  |  | 8,872 |  |  | 8,001 |
Less current portion |  |  | 122 |  |  | 115 |
Debt and capital lease obligations, less current portion |  |  | $ | 8,750 |  |  | $ | 7,886 |
Summary of credit facilities | Summary of Credit Facilities We had outstanding borrowings, letters of credit issued, and availability under our credit facilities as follows (in millions):
|  |  |  |  |  | December 31, 2017
|  | Facility Amount |  | Maturity Date |  | Outstanding Borrowings |  | Letters of Credit Issued |  | Availability
Committed facilities: |  |  |  |  |  |  |  |  |  |
Valero Revolver |  | $ | 3,000 |  |  | November 2020 |  | $ | — |  |  | $ | 54 |  |  | $ | 2,946 |
VLP Revolver |  | $ | 750 |  |  | November 2020 |  | $ | 410 |  |  | $ | — |  |  | $ | 340 |
Canadian Revolver |  | C$ | 75 |  |  | November 2018 |  | C$ | — |  |  | C$ | 10 |  |  | C$ | 65 |
Accounts receivable sales facility |  | $ | 1,300 |  |  | July 2018 |  | $ | 100 |  |  | n/a |  |  | $ | 1,200 |
Letter of credit facility |  | $ | 100 |  |  | November 2018 |  | n/a |  |  | $ | — |  |  | $ | 100 |
Uncommitted facilities: |  |  |  |  |  |  |  |  |  |
Letter of credit facilities |  | n/a |  |  | n/a |  | n/a |  |  | $ | 249 |  |  | n/a |
Interest and debt expense, net of capitalized interest | Interest and debt expense, net of capitalized interest is comprised as follows (in millions):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Interest and debt expense | $ | 539 |  |  | $ | 511 |  |  | $ | 504 |
Less capitalized interest | 71 |  |  | 65 |  |  | 71 |
Interest and debt expense, net of capitalized interest | $ | 468 |  |  | $ | 446 |  |  | $ | 433 |
Principal payments on debt and future minimum rentals on capital lease obligations | Principal maturities for our debt obligations and future minimum rentals on capital lease obligations as of December 31, 2017 were as follows (in millions):
| Debt |  | Capital Lease Obligations
2018 | $ | 106 |  |  | $ | 55 |
2019 | 756 |  |  | 55 |
2020 | 1,266 |  |  | 53 |
2021 | 6 |  |  | 52 |
2022 | 6 |  |  | 54 |
Thereafter | 6,243 |  |  | 969 |
Net unamortized debt issuance costs and other | (73 | ) |  | n/a |
Total minimum lease payments | n/a |  |  | 1,238 |
Less amount representing interest | n/a |  |  | 676 |
Total | $ | 8,310 |  |  | $ | 562 |

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