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Supplemental Cash Flow Information
 6 Months Ended
Jun. 30, 2025
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information SUPPLEMENTAL CASH FLOW INFORMATION
 
The following table provides supplemental disclosure of substantive cash flow information (in millions):
Six Months Ended June 30,
20252024
Cash paid during the period for interest on debt, net of amounts capitalized$380 $405 
Non-cash investing activities:
Unpaid purchases of property, plant and equipment (1)29 23 
Right-of-use assets obtained in exchange for lease liabilities:
Operating lease liabilities (2)2 36 
Finance lease liabilities (3)— 74 
(1)Reflects unpaid portion, as of the end of each period, of assets and liabilities recognized during the respective periods.
(2)Net of $33 million reclassified from operating leases to finance leases during the six months ended June 30, 2024, as a result of modifications of the underlying tug vessel leases.
(3)Net of $15 million reclassified from finance leases to operating leases during the six months ended June 30, 2024, as a result of modifications of the underlying tug vessel leases.