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Debt and Capital Lease Obligations, Credit Facilities (Details) CAD in Millions, $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 CAD | Mar. 31, 2017 USD ($) | Dec. 31, 2016
Valero Revolver [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 3,000 |
Line of credit facility, expiration date | Nov. 30, 2020 |  |
Amount outstanding |  | 0 |
Line of credit facility, remaining borrowing capacity |  | 2,850 |
Valero Revolver Letter of Credit [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Amount outstanding |  | 150 |
VLP Revolver [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Line of credit facility, maximum borrowing capacity |  | 750 |
Line of credit facility, expiration date | Nov. 30, 2020 |  |
Amount outstanding |  | 30 |
Line of credit facility, remaining borrowing capacity |  | $ 720 |
Credit Facilities (Textual) |  |  |
Weighted-average interest rate | 2.3125% | 2.3125% | 2.3125%
VLP Revolver Letter of Credit [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Amount outstanding |  | $ 0 |
Canadian Revolver [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Line of credit facility, maximum borrowing capacity | CAD | CAD 25 |  |
Line of credit facility, expiration date | Nov. 30, 2017 |  |
Amount outstanding | CAD | CAD 0 |  |
Line of credit facility, remaining borrowing capacity | CAD | 15 |  |
Canadian Revolver Letter of Credit [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Amount outstanding | CAD | CAD 10 |  |
A/R Sales Facility [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Line of credit facility, maximum borrowing capacity |  | 1,300 |
Line of credit facility, expiration date | Jul. 31, 2017 |  |
Amount outstanding |  | 100 |
Line of credit facility, remaining borrowing capacity |  | $ 1,183 |
Credit Facilities (Textual) |  |  |
Weighted-average interest rate | 1.4805% | 1.4805% | 1.3422%
Committed Letter of Credit Facility [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 225 |
Amount outstanding |  | 0 |
Line of credit facility, remaining borrowing capacity |  | 225 |
Committed Letter of Credit Facility Expires June 2017 [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Line of credit facility, expiration date | Jun. 30, 2017 |  |
Committed Letter of Credit Facility Expires November 2017 [Member] | Credit Facilities [Member] |  |  |
Line of Credit Facility |  |  |
Line of credit facility, expiration date | Nov. 30, 2017 |  |
Uncommitted Letter of Credit Facility [Member] |  |  |
Line of Credit Facility |  |  |
Amount outstanding |  | $ 235 |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a 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. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: 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(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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