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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Disaggregation of Revenue        
Operating revenues $ 1,315.7 $ 1,352.0 $ 3,951.4 $ 4,127.2
Transportation        
Disaggregation of Revenue        
Operating revenues 1,196.7 1,253.4 3,625.8 3,823.5
Logistics Management        
Disaggregation of Revenue        
Operating revenues 53.2 45.2 155.1 135.9
Other        
Disaggregation of Revenue        
Operating revenues $ 65.8 $ 53.4 $ 170.5 $ 167.8