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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Event On February 10, 2025, MPC issued $2.0 billion aggregate principal amount of senior notes in an underwritten public offering consisting of $1.1 billion aggregate principal amount of 5.150 percent senior notes due March 2030 and $900 million aggregate principal amount of 5.700 percent senior notes due March 2035. We intend to use the net proceeds from this offering to repay, redeem or otherwise retire our outstanding $1.250 billion aggregate principal amount of 4.700 percent senior notes due May 2025 and for general corporate purposes.