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Commitments and Contingencies (Guarantees) (Details) - USD ($)
$ in Millions
Jul. 01, 2025
Jun. 30, 2025
Other Guarantees    
Loss Contingencies [Line Items]    
Maximum potential undiscounted payments   $ 226
LOOP and LOCAP LLC | Guarantee of Indebtedness of Others | Financial Guarantee    
Loss Contingencies [Line Items]    
Maximum potential undiscounted payments   $ 214
Bakken Pipeline System | Indirect    
Loss Contingencies [Line Items]    
Ownership percentage   9.19%
Bakken Pipeline System | Guarantee of Indebtedness of Others | Financial Guarantee    
Loss Contingencies [Line Items]    
Maximum potential undiscounted payments   $ 78
BANGL, LLC | BANGL, LLC Acquisition | Subsequent Event    
Loss Contingencies [Line Items]    
Additional ownership acquired 55.00%