Investment gains (losses) - Narrative (Detail) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Jan. 31, 2023 |
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| Gain (Loss) on Securities [Line Items] | ||||
| Sales of equity securities | $ 30,686 | $ 143,359 | $ 40,631 | |
| Taxable gains (losses) on sales of equity securities | $ 23,700 | $ 101,100 | $ 5,000 | |
| Pilot Travel Centers LLC [Member] | ||||
| Gain (Loss) on Securities [Line Items] | ||||
| Equity interest ownership percentage | 38.60% | 38.60% | ||
| Other Investment gains from remeasurement | $ 3,000 | |||
| Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain (Loss) on Investments | |||
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- Definition Taxable gains (loss) on sales of equity securities. No definition available.
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- Definition Indicates line item in statement of income or comprehensive income that includes gain (loss) from remeasurement of acquisition-date fair value of equity interest in acquiree held by acquirer immediately before acquisition date in business combination achieved in stages. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of gain (loss) from remeasurement of acquisition-date fair value of equity interest in acquiree held by acquirer immediately before acquisition date in business combination achieved in stages. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash inflow from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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