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Debt and Capital Lease Obligations (Tables) | 6 Months Ended
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Jun. 30, 2018
Debt and Capital Lease Obligations [Abstract] |
Summary of credit facilities | We had outstanding borrowings, letters of credit issued, and availability under our credit facilities as follows (amounts in millions and currency in U.S. dollars, except as noted):
|  |  |  |  |  | June 30, 2018
|  | Facility Amount |  | Maturity Date |  | Outstanding Borrowings |  | Letters of Credit Issued |  | Availability
Committed facilities: |  |  |  |  |  |  |  |  |  |
Valero Revolver |  | $ | 3,000 |  |  | November 2020 |  | $ | — |  |  | $ | 119 |  |  | $ | 2,881 |
VLP Revolver |  | 750 |  |  | November 2020 |  | — |  |  | — |  |  | 750 |
IEnova Revolver |  | 340 |  |  | February 2028 |  | 56 |  |  | n/a |  |  | 284 |
Canadian Revolver |  | C$ | 75 |  |  | November 2018 |  | C$ | — |  |  | C$ | 6 |  |  | C$ | 69 |
Accounts receivable sales facility (a) |  | 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 |  |  | 301 |  |  | n/a |
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(a) | In July 2018, we amended this facility to extend the maturity date from July 2018 to July 2019.
Interest and debt expense, net of capitalized interest | Interest and debt expense, net of capitalized interest is comprised of the following (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Interest and debt expense | $ | 144 |  |  | $ | 134 |  |  | $ | 283 |  |  | $ | 268 |
Less capitalized interest | 20 |  |  | 15 |  |  | 38 |  |  | 28 |
Interest and debt expense, net of capitalized interest | $ | 124 |  |  | $ | 119 |  |  | $ | 245 |  |  | $ | 240 |

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- Definition Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities. + References No definition available. + Details
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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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