v3.26.1
Supplemental Cash Flow Information (Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
 [1]
Jun. 30, 2025
 [1]
Jun. 30, 2026
Jun. 30, 2025
Supplemental Cash Flow Elements [Abstract]        
Additions to property, plant and equipment per the Consolidated Statements of Cash Flows     $ 2,099 $ 1,358
Increase (decrease) in capital accruals     94 (5)
Capital expenditures $ 1,181 $ 709 $ 2,193 [2] $ 1,353 [2]
[1] Includes changes in capital expenditure accruals. See Note 18 for a reconciliation of total capital expenditures to additions to property, plant and equipment for the six months ended June 30, 2026 and 2025 as reported in the Consolidated Statements of Cash Flows.
[2] The six months ended June 30, 2026 excludes $62 million of funding to the Martinez Renewables JV due to turnaround costs in the first quarter of 2026 expected to be recovered through subsequent distributions from the JV during 2026.