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Debt, Credit Facilities and Bank Debt (Details) | 12 Months Ended | 0 Months Ended |  | 0 Months Ended | 1 Months Ended | 0 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended |  |  |  | 0 Months Ended | 12 Months Ended |
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Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Nov. 14, 2013 Spinoff [Member] USD ($) | May 01, 2013 Spinoff [Member] USD ($) | Nov. 14, 2013 Spinoff [Member] Notes Payable to Banks [Member] USD ($) | May 01, 2013 Spinoff [Member] Notes Payable to Banks [Member] USD ($) | Oct. 24, 2013 Spinoff [Member] Notes Payable to Banks [Member] USD ($) | Apr. 16, 2013 Spinoff [Member] Notes Payable to Banks [Member] Sourced From Parent's Short-Term Borrowings [Member] USD ($) | Dec. 31, 2013 Other Letter of Credit [Member] USD ($) | Dec. 31, 2012 Other Letter of Credit [Member] USD ($) | Mar. 20, 2013 Credit Facilities [Member] Spinoff [Member] USD ($) | Dec. 31, 2013 Credit Facilities [Member] Letter of Credit [Member] USD ($) | Dec. 31, 2012 Credit Facilities [Member] Letter of Credit [Member] USD ($) | Dec. 31, 2013 Credit Facilities [Member] U S Revolver [Member] USD ($) | Dec. 31, 2012 Credit Facilities [Member] U S Revolver [Member] USD ($) | Dec. 31, 2011 Credit Facilities [Member] U S Revolver [Member] USD ($) | Dec. 31, 2013 Credit Facilities [Member] U S Revolver [Member] Maximum [Member] | Dec. 31, 2013 Credit Facilities [Member] U S Revolver Letter of Credit [Member] USD ($) | Dec. 31, 2012 Credit Facilities [Member] U S Revolver Letter of Credit [Member] USD ($) | Dec. 31, 2013 Credit Facilities [Member] Canadian Revolver [Member] CAD | Dec. 31, 2012 Credit Facilities [Member] Canadian Revolver [Member] CAD | Dec. 31, 2011 Credit Facilities [Member] Canadian Revolver [Member] CAD | Nov. 29, 2012 Credit Facilities [Member] Canadian Revolver [Member] CAD | Dec. 31, 2013 Credit Facilities [Member] Canadian Revolver Letter of Credit [Member] CAD | Dec. 31, 2012 Credit Facilities [Member] Canadian Revolver Letter of Credit [Member] CAD | Nov. 14, 2013 Credit Facilities [Member] VLP Revolver [Member] USD ($) quarter renewal | Dec. 31, 2013 Credit Facilities [Member] VLP Revolver [Member] USD ($) | Nov. 14, 2013 Credit Facilities [Member] VLP Revolver [Member] Maximum [Member]
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  | $ 800,000,000 | $ 550,000,000 |  | $ 3,000,000,000 |  |  |  |  |  | 50,000,000 |  |  | 115,000,000 |  |  | $ 300,000,000 |  |
Line of credit facility, expiration date (month, year) |  |  |  |  |  |  |  |  |  |  |  |  | June 2014 |  | November 2018 |  |  |  |  |  | November 2014 |  |  |  |  |  | December 2018 |  |
Amount outstanding |  |  |  |  |  |  |  |  |  | 189,000,000 | 275,000,000 |  | 278,000,000 | 418,000,000 |  |  |  |  | 59,000,000 | 59,000,000 |  |  |  |  | 10,000,000 | 10,000,000 |  |  |
Credit Facilities (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, accordion feature, higher borrowing capacity option |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,500,000,000 |  |  |  |  |  |  |  |  |  |  |  | 500,000,000 |  |
Line of credit facility, duration of renewal option (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |
Debt to capitalization ratios as per terms of revolver |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.12 | 0.23 |  | 0.60 |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, number of renewal options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Number of prior quarterly reporting periods used for debt to EBITDA ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |
Debt to EBITDA ratio as per terms of revolver |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.0
Borrowings from long-term lines of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 1,100,000,000 | 0 |  |  |  | 0 | 0 | 0 |  |  |  |  | 0 |
Repayments of long-term lines of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 1,100,000,000 | 0 |  |  |  | 0 | 0 | 0 |  |  |  |  | 0 |
Proceeds from short-term debt in anticipation of separation | 550,000,000 | 0 | 0 |  |  |  |  |  | 550,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior unsecured bonds of CST issued to us | 49,000,000 | 26,000,000 |  |  | 550,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CST securities exchanged in settlement of short-term borrowings |  |  |  |  |  | 467,000,000 | 550,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short-term debt related to disposition of retained interest | 525,000,000 | 0 | 0 |  |  |  |  | 525,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of short-term debt related to disposition of retained interest |  |  |  |  |  | 58,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for (Proceeds from) Other Investing Activities | 57,000,000 | 101,000,000 | 76,000,000 | 19,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of retained interest in CST Brands, Inc. | $ 325,000,000 | $ 0 | $ 0 | $ 325,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The profit or loss on sales of previously unissued stock by equity investees made to investors outside the consolidated group that is not reported as operating income. Represents the difference in the parent company's carrying amount of the equity interest in the subsidiary or equity investee immediately before and after the transaction. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + 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 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4531-111522 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 + Details
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- Definition The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition The cash inflow from bank borrowing during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a borrowing not otherwise defined in the taxonomy having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Value of investments transferred from the entity's investments in noncash transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Debt to capitalization ratios as per terms of revolver. + References No definition available. + Details
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- Definition Debt to EBITDA ratio as per the terms of the credit facility agreement. + References No definition available. + Details
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- Definition Aggregate commitments available 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, subject to certain conditions by obtaining additional commitments from existing and/or new lenders. + References No definition available. + Details
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- Definition Term of the entity’s line of credit facility renewal option that may be requested. + References No definition available. + Details
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- Definition Reflects when the credit facility terminates, which is presented in month, year. + References No definition available. + Details
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- Definition Number of prior quarterly reporting periods tested to determine compliance with the covenant of ratio of total debt to EBITDA as per the terms of the credit facility agreement. + References No definition available. + Details
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- Definition Represents the number of times an entity may request to renew or extend the term of an agreement or contract. + References No definition available. + Details
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