v3.24.1.u1
Debt (Tables)
3 Months Ended
Mar. 31, 2024
Debt Disclosure [Abstract]  
Schedule of Debt
MPLX’s outstanding borrowings consist of the following:
(In millions)March 31,
2024
December 31,
2023
MPLX LP:
MPLX Credit Agreement$— $— 
Fixed rate senior notes20,657 20,657 
Consolidated subsidiaries:
MarkWest12 12 
ANDX31 31 
Finance lease obligations6 6 
Total20,706 20,706 
Unamortized debt issuance costs(119)(122)
Unamortized discount(143)(153)
Amounts due within one year(1,639)(1,135)
Total long-term debt due after one year$18,805 $19,296