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+ Details

Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Apr. 07, 2023
Business Combination Line Items
Property and equipment			$ 1,600
Goodwill	$ 15,351	$ 15,351
Montana Rail Link
Business Combination Line Items
Property and equipment			1,571
Materials and supplies			10
Goodwill			532
Fair value of assets			$ 2,113