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Debt (Tables) | 3 Months Ended
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Mar. 31, 2019
Debt Disclosure [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):
|  |  |  |  |  | March 31, 2019
|  | Facility Amount |  | Maturity Date |  | Outstanding Borrowings |  | Letters of Credit Issued (b) |  | Availability
Committed facilities: |  |  |  |  |  |  |  |  |  |
Valero Revolver |  | $ | 4,000 |  |  | March 2024 |  | $ | — |  |  | $ | 55 |  |  | $ | 3,945 |
Canadian Revolver |  | C$ | 150 |  |  | November 2019 |  | C$ | — |  |  | C$ | 5 |  |  | C$ | 145 |
Accounts receivable sales facility |  | $ | 1,300 |  |  | July 2019 |  | $ | 100 |  |  | n/a |  |  | $ | 1,200 |
Letter of credit facility |  | $ | 100 |  |  | November 2019 |  | n/a |  |  | $ | — |  |  | $ | 100 |
Committed facilities of VIE (a): |  |  |  |  |  |  |  |  |  |
IEnova Revolver |  | $ | 340 |  |  | February 2028 |  | $ | 132 |  |  | n/a |  |  | $ | 208 |
Uncommitted facilities: |  |  |  |  |  |  |  |  |  |
Letter of credit facilities |  | n/a |  |  | n/a |  | n/a |  |  | $ | 408 |  |  | n/a |
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(a) | Creditors of our VIE do not have recourse against us.
(b) Letters of credit issued as of March 31, 2019 expire at various times in 2019 through 2020.
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 March 31,
| 2019 |  | 2018
Interest and debt expense | $ | 136 |  |  | $ | 139 |
Less capitalized interest | 24 |  |  | 18 |
Interest and debt expense, net of capitalized interest | $ | 112 |  |  | $ | 121 |

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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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