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Inventories
3 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Inventories 2.  Inventories
Inventories consisted of the following:
March 31,
2025
December 31,
2024
 (In millions)
Crude oil and natural gas liquids$100 $95 
Materials and supplies372 324 
Total Inventories$472 $419