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Debt (Tables)
 9 Months Ended
Sep. 30, 2015
Debt Disclosure [Abstract]  
Summary of Outstanding Borrowings
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.