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Debt
9 Months Ended
Sep. 30, 2015
Debt Disclosure [Abstract]  
Debt
Debt

Our outstanding borrowings at September 30, 2015 and December 31, 2014 consisted of the following:
 
(In millions)
September 30, 2015
 
December 31, 2014
MPLX LP:
 
 
 
Bank revolving credit facility due 2019

 
385.0

Term loan facility due 2019
250.0

 
250.0

4.000% senior notes due 2025
500.0

 

Consolidated subsidiaries:
 
 
 
Pipe Line Holdings - revolving credit agreement due 2019

 

MPL - capital lease obligations due 2020
9.1

 
9.8

Total
759.1

 
644.8

Unamortized debt issuance costs(1)
(4.1
)
 

Unamortized discount
(1.7
)
 

Amounts due within one year
(0.8
)
 
(0.8
)
Total long-term debt due after one year
$
752.5

 
$
644.0



(1) 
We adopted the updated FASB debt issuance cost standard as of June 30, 2015. This has been applied retrospectively and there was no effect to the prior period presented.

Senior Notes

On February 12, 2015, we completed a public offering of $500 million aggregate principal amount of four percent unsecured senior notes due February 15, 2025 (the “Senior Notes”). The net proceeds from the offering of the Senior Notes were approximately $495.0 million, after deducting underwriting discounts. The net proceeds were used to repay the amounts outstanding under the bank revolving credit facility, as well as for general partnership purposes. Interest is payable semi-annually in arrears on February 15 and August 15 of each year, commencing on August 15, 2015.

Credit Agreements

During the nine months ended September 30, 2015, we borrowed $30.0 million under the bank revolving credit facility, at an average interest rate of 1.457 percent, per annum, and repaid $415.0 million of these borrowings. At September 30, 2015, we had no borrowings or letters of credit outstanding under this facility, resulting in total unused loan availability of $1.0 billion, or 100 percent of the borrowing capacity.

The $250 million term loan facility was drawn in full on November 20, 2014. The borrowings under this facility during the nine months ended September 30, 2015 were at an average interest rate of 1.651 percent.