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Business Combinations	3 Months Ended
Business Combinations	Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract]
Business Combination	Business Combinations On March 8, 2023, the Surface Transportation Board (STB) issued a decision approving the discontinuance of service by Montana Rail Link, Inc. (MRL) over that certain line owned by BNSF Railway and leased to MRL, with BNSF Railway to resume providing service over the line. This decision became effective April 7, 2023. The results of operations for MRL have been included in the Consolidated Statements of Income from the effective date of the STB's decision. The purchase price allocation was finalized as of March 31, 2024 with no material adjustments from those disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2023. See Note 7 to the Consolidated Financial Statements of the Company's Annual Report on Form 10-K for additional information regarding the MRL transaction.