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Acquisition - Acquisition of Hi-Rail (Details) - Hi-Rail - USD ($)
$ in Millions
3 Months Ended
Jan. 14, 2022
Mar. 31, 2022
Business Acquisition [Line Items]    
Percentage of voting rights acquired 100.00%  
Working capital adjustments $ 51.0  
Revenues   $ 3.8
Pretax income (loss)   $ (1.3)