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
	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