Commitments and Contingencies Insurance (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Loss Contingencies [Line Items] | ||
| Cash and cash equivalents | $ 1,441 | $ 2,463 |
| Commercial Paper, Bank Time Deposits, and Money Market Funds | BNSF Insurance Company | ||
| Loss Contingencies [Line Items] | ||
| Cash and cash equivalents | $ 604 | $ 593 |
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- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. 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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