v3.26.1
Pending Acquisition - Narrative (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2027
USD ($)
state
intercharge
port
mi
$ / shares
shares
Mar. 31, 2026
USD ($)
Jul. 28, 2025
USD ($)
state
Forecast      
Business Combination [Line Items]      
Number of states in which entity operates | state 43    
Transcontinental railroad (in miles) | mi 50,000    
Number of international interchanges | intercharge 10    
Number of ports | port 100    
Norfolk Southern      
Business Combination [Line Items]      
Other current assets   $ 13  
Termination fee     $ 2,500
Norfolk Southern | Forecast      
Business Combination [Line Items]      
Entity shares issued (in shares) | shares 1    
Cash paid per acquiree share (in dollars per share) | $ / shares $ 88.82    
Stock issued (in shares) | shares 225,000,000    
Cash consideration $ 20,000    
Norfolk Southern      
Business Combination [Line Items]      
Number of states in which entity operates | state     22