
5.	DEBT

Bank Debt and Credit Facilities

We have a $3 billion revolving credit facility (the Revolver) that has a maturity date of December 2016. The Revolver has certain restrictive covenants, including a maximum debt-to-capitalization ratio of 60 percent. As of March 31, 2013 and December 31, 2012, our debt-to-capitalization ratios, calculated in accordance with the terms of the Revolver, were 21 percent and 23 percent, respectively. We believe that we will remain in compliance with this covenant. In addition to the Revolver, one of our Canadian subsidiaries has a committed revolving credit facility under which it may borrow and obtain letters of credit up to C$50 million.

During the three months ended March 31, 2013 and 2012, we had no borrowings or repayments under our Revolver or the Canadian revolving credit facility. As of March 31, 2013 and December 31, 2012, we had no borrowings outstanding under the Revolver or the Canadian revolving credit facility.

On March 20, 2013, in anticipation of the separation of our retail business as described in Note 2, CST entered into a credit agreement providing for $800 million of senior secured credit facilities (consisting of a $500 million term loan and a revolving credit facility with a borrowing capacity of up to $300 million). Borrowings under the term loan and revolving credit facility will bear interest at a base rate or the London Interbank Offered Rate, as prescribed in the agreement. The credit agreement matures on May 1, 2018 and has certain restrictive covenants. As of March 31, 2013, no amounts were outstanding under these credit facilities. This credit facility was retained by CST after the separation from us.

On April 16, 2013, also in anticipation of the separation of our retail business, we borrowed $550 million under a short-term debt agreement with a third-party financial institution. On May 1, 2013, CST issued $550 million of its senior unsecured bonds to us, and we exchanged those bonds with the third-party financial institution in satisfaction of our short-term debt.

We had outstanding letters of credit under our committed lines of credit as follows (in millions):



				Amounts Outstanding
	Borrowing Capacity		Expiration	March 31, 2013		December 31, 2012
Letter of credit facilities	$	550	June 2013	$	550	$	418
Revolver	$	3,000	December 2016	$	59	$	59
Canadian revolving credit facility	C$	50	November 2013	C$	10	C$	10

As of March 31, 2013 and December 31, 2012, we had $441 million and $275 million, respectively, of letters of credit outstanding under our uncommitted short-term bank credit facilities.

Non-Bank Debt

In January 2013, we made a scheduled debt repayment of $180 million related to our 6.7% senior notes. In March 2012, we exercised the call provisions on our Series 1997 5.6%, Series 1998 5.6%, Series 1999 5.7%, Series 2001 6.65%, and Series 1997A 5.45% industrial revenue bonds, which were redeemed on May 3, 2012 for $108 million, or 100 percent of their outstanding stated values.

Accounts Receivable Sales Facility

We have an accounts receivable sales facility with a group of third-party entities and financial institutions to sell up to $1.5 billion of eligible trade receivables on a revolving basis. This facility matures in July 2013. Proceeds from the sale of receivables under this facility are reflected as debt. Under this program, one of our marketing subsidiaries (Valero Marketing) sells eligible receivables, without recourse, to another of our subsidiaries (Valero Capital), whereupon the receivables are no longer owned by Valero Marketing. Valero Capital, in turn, sells an undivided percentage ownership interest in the eligible receivables, without recourse, to the third-party entities and financial institutions. To the extent that Valero Capital retains an ownership interest in the receivables it has purchased from Valero Marketing, such interest is included in our financial statements solely as a result of the consolidation of the financial statements of Valero Capital with those of Valero Energy Corporation; the receivables are not available to satisfy the claims of the creditors of Valero Marketing or Valero Energy Corporation.

Changes in the amounts outstanding under our accounts receivable sales facility were as follows (in millions):



	Three Months Ended March 31,
	2013		2012
Balance as of beginning of period	$	100	$	250
Repayments	—		(150		)
Balance as of end of period	$	100	$	100

Capitalized Interest

Capitalized interest was $40 million and $52 million for the three months ended March 31, 2013 and 2012, respectively.