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Financing Arrangements (Details)
$ in Millions
Dec. 14, 2022
USD ($)
Oct. 18, 2017
USD ($)
facility
Nov. 30, 2022
USD ($)
May 31, 2022
USD ($)
Financing Arrangements        
Debt issuance costs, net     $ (0.8) $ (1.1)
Long-term debt     197.2 98.9
Term loan        
Financing Arrangements        
Maximum borrowing capacity   $ 31.0    
Revolving credit facility with interest payable monthly        
Financing Arrangements        
Carrying amount of debt     198.0 $ 100.0
Revolving Credit Facility | Revolving credit facility with interest payable monthly        
Financing Arrangements        
Carrying amount of debt     198.0  
Line of credit facility, Additional borrowing capacity $ 300.0      
Line of credit facility, Maximum additional borrowing capacity $ 920.0      
Remaining borrowing capacity     390.8  
Revolving Credit Facility | Revolving credit facility with interest payable monthly | Letter of Credit        
Financing Arrangements        
Carrying amount of debt     $ 11.2  
Revolving Credit Facility | Eurodollar rate | Revolving credit facility with interest payable monthly | Minimum        
Financing Arrangements        
Debt instrument basis spread on variable rate after amendment 112.50%      
Revolving Credit Facility | Eurodollar rate | Revolving credit facility with interest payable monthly | Maximum        
Financing Arrangements        
Debt instrument basis spread on variable rate after amendment 200.00%      
Revolving Credit Facility | Base rate | Revolving credit facility with interest payable monthly | Minimum        
Financing Arrangements        
Debt instrument basis spread on variable rate after amendment 12.50%      
Revolving Credit Facility | Base rate | Revolving credit facility with interest payable monthly | Maximum        
Financing Arrangements        
Debt instrument basis spread on variable rate after amendment 100.00%      
Unsecured revolving credit facility        
Financing Arrangements        
Credit agreement $ 620.0      
MRO facilities acquired in Canada owned by Premier Aviation        
Financing Arrangements        
Number of facilities acquired | facility   2