Debt

Our outstanding borrowings at June 30, 2014 and December 31, 2013 consisted of the following:



(In millions)	June 30, 2014			December 31, 2013
Marathon Petroleum Corporation:
Revolving credit agreement due 2017	$	—		$	—
3.500% senior notes due March 1, 2016	750			750
5.125% senior notes due March 1, 2021	1,000			1,000
6.500% senior notes due March 1, 2041	1,250			1,250
Consolidated subsidiaries:
Capital lease obligations due 2014-2028	384			395
MPLX Operations LLC revolving credit agreement due 2017	255			—
Trade receivables securitization facility due 2016	—			—
Total	3,639			3,395
Unamortized discount	(10		)	(10		)
Fair value adjustments^(a)	9			11
Amounts due within one year	(26		)	(23		)
Total long-term debt due after one year	$	3,612		$	3,373


^(a)	The $20 million gain on the termination of our interest rate swap agreements in 2012 is being amortized over the remaining life of the 3.50 percent senior notes.

There were no borrowings or letters of credit outstanding under the MPC revolving credit agreement or the trade receivables securitization facility at June 30, 2014. During the six months ended June 30, 2014, MPLX borrowed $270 million under the MPLX Operations LLC revolving credit agreement (the "MPLX Credit Agreement"), at an average interest rate of 1.5 percent, per annum, and had repayments of $15 million. The borrowings were used to fund MPLX's acquisition of an additional interest in Pipe Line Holdings. At June 30, 2014, MPLX had $255 million of borrowings and no letters of credit outstanding under the MPLX Credit Agreement, resulting in total unused loan availability of $245 million, or 49 percent of the borrowing capacity. The MPLX Credit Agreement is scheduled to mature on October 31, 2017.