Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments, Gain (Loss) [Table Text Block]

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:

(In millions)	2024		2023		2022
Product sales
Realized gain	$	1	$	7	$	—
Product sales derivative gain	1		7		—
Purchased product costs
Realized loss	(13)		(11)		(12)
Unrealized gain	3		—		47
Purchased product cost derivative (loss)/gain	(10)		(11)		35
Total derivative (loss)/gain included in Net Income	$	(9)	$	(4)	$	35