v3.24.1.u1
Derivative Financial Instruments (Tables)
 3 Months Ended
Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments, Gain (Loss) The impact of MPLX’s derivative contracts not designated as hedging instruments and the location of gains and losses recognized in the Consolidated Statements of Income is summarized below:
Three Months Ended 
March 31,
(In millions)20242023
Product sales:
Unrealized gain$— $2 
Product sales derivative gain— 2 
Purchased product costs:
Realized loss(4)(3)
Unrealized (loss)/gain(8)3 
Purchased product cost derivative loss(12)— 
Total derivative (loss)/gain included in Net income$(12)$2