XML 78 R68.htm IDEA: XBRL DOCUMENT v3.25.3
Pending Acquisition - Narrative (Details)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2027
USD ($)
state
$ / shares
shares
Sep. 30, 2025
USD ($)
Jul. 28, 2025
USD ($)
state
Forecast      
Business Combination [Line Items]      
Number of states in which entity operates | state 43    
Norfolk Southern      
Business Combination [Line Items]      
Other current assets   $ 8  
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 224,800,000    
Cash consideration $ 20,000    
Norfolk Southern      
Business Combination [Line Items]      
Number of states in which entity operates | state     22