Revenues and Accounts Receivable - Disaggregation of Revenue (Details) - Operating Segments - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 44,237	$ 48,838	$ 47,332
Crude Oil
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	44,087	48,651	47,146
Crude Oil \| Sales
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	42,408	47,036	45,621
Crude Oil \| Transportation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,330	1,231	1,144
Crude Oil \| Terminalling, Storage and Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	349	384	381
NGL
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	150	187	186
NGL \| Sales
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	144	180	179
NGL \| Terminalling, Storage and Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 6	$ 7	$ 7

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details