Annual report pursuant to Section 13 and 15(d)

Business Combinations (Narrative) (Details)

v3.20.2
Business Combinations (Narrative) (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 20, 2018
USD ($)
Feb. 28, 2018
USD ($)
Aug. 18, 2017
USD ($)
state
May 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Nov. 30, 2019
USD ($)
Aug. 31, 2019
USD ($)
May 31, 2019
USD ($)
Feb. 28, 2019
USD ($)
Nov. 30, 2018
USD ($)
Aug. 31, 2018
USD ($)
May 31, 2020
USD ($)
May 31, 2019
USD ($)
May 31, 2018
USD ($)
Business Acquisition [Line Items]                            
Restricted cash       $ 71.1       $ 57.1       $ 71.1 $ 57.1  
Revenues       915.1 $ 1,142.7 $ 990.7 $ 992.0 980.4 $ 1,070.4 $ 858.9 $ 862.8 4,040.5 3,772.5 $ 3,377.7
Net income       220.7 $ 354.5 $ 258.7 $ 264.2 230.4 $ 324.6 $ 235.8 $ 243.6 1,098.1 1,034.4 994.1
Goodwill       $ 1,791.1       $ 1,782.6       $ 1,791.1 1,782.6 814.0
Oasis Outsourcing Group Holdings, L.P. [Member]                            
Business Acquisition [Line Items]                            
Effective acquisition date                       Dec. 20, 2018    
Purchase price $ 992.2                          
Cash acquired 262.3                          
Restricted cash 132.1                          
Revenues                         163.7  
Net income                         5.1  
Acquisition financed amount 800.0                          
Incurred acquisition and integration costs                         5.3  
Amortizable intangible assets 310.9                          
Goodwill $ 976.6                          
Excluded incurred costs related to acquisition                         2.7  
Excluded incurred costs related to acquisition, net of tax                         $ 2.0  
Included incurred costs related to acquisition                           2.7
Included incurred costs related to acquisition, net of tax                           $ 1.7
Oasis Outsourcing Group Holdings, L.P. [Member] | Weighted Average [Member]                            
Business Acquisition [Line Items]                            
Amortization period 10 years                          
Lessor Group [Member]                            
Business Acquisition [Line Items]                            
Effective acquisition date                       Feb. 28, 2018    
Purchase price   $ 162.5                        
Cash acquired   13.4                        
Goodwill   $ 112.3                        
HR Outsourcing Holdings, Inc. [Member]                            
Business Acquisition [Line Items]                            
Effective acquisition date                       Aug. 18, 2017    
Purchase price     $ 75.4                      
Cash portion of purchase price     42.2                      
Common stock issued portion of purchase price     33.2                      
Goodwill     $ 51.1                      
HR Outsourcing Holdings, Inc. [Member] | Minimum [Member]                            
Business Acquisition [Line Items]                            
Number of states | state     35