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Subsequent Events (Details) - Subsequent Event - USD ($) $ in Millions	Jul. 31, 2025	Jul. 03, 2025	Jul. 01, 2025	Aug. 05, 2025
The Andersons Marathon Holdings LLC
Subsequent Event [Line Items]
Sale of Stock, Percentage of Ownership before Transaction	49.90%
Proceeds from Sale of Equity Method Investments	$ 425
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee	$ 245
MPLX: \| Share Repurchase Authorization August 2025
Subsequent Event [Line Items]
Stock repurchase program, authorized amount				$ 1,000
MPLX: \| BANGL, LLC Acquisition
Subsequent Event [Line Items]
Repayments of debt		$ 656
MPLX: \| BANGL, LLC Acquisition \| BANGL, LLC
Subsequent Event [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage			55.00%
Payments to acquire businesses and interest in affiliates			$ 700
Business Combination, Contingent Consideration, Liability			275
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount			$ 275
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions			100.00%
Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain (Loss)			$ 400