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Commitments and Contingencies BNSF Insurance Company (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Cash and cash equivalents	$ 2,004	$ 2,148
BNSF Insurance Company \| Commercial Paper, Bank Time Deposits, and Money Market Funds
Loss Contingencies [Line Items]
Cash and cash equivalents	$ 562	$ 561

- 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.

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