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Supplemental Cash Flow Information
 6 Months Ended
Jun. 30, 2025
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information Supplemental Cash Flow Information
Six Months Ended 
June 30,
(Millions of dollars)20252024
Net cash provided by operating activities included:
Interest paid (net of amounts capitalized)$590 $602 
Net income taxes paid to (received from) taxing authorities(a)
119 191 
Non-cash investing and financing activities:
Contribution of assets(b)
115 — 
(a)    2025 includes $111 million paid to third parties for transferable tax credits.
(b)    Represents the book value of assets contributed by MPLX to a joint venture.
The consolidated statements of cash flows exclude changes to the consolidated balance sheets that did not affect cash. The following is a reconciliation of additions to property, plant and equipment to total capital expenditures:
Six Months Ended 
June 30,
(Millions of dollars)20252024
Additions to property, plant and equipment per the consolidated statements of cash flows$1,358 $1,072 
Decrease in capital accruals(5)(46)
Total capital expenditures$1,353 $1,026