Annual report pursuant to Section 13 and 15(d)

Business Combinations (Narrative) (Details)

v3.10.0.1
Business Combinations (Narrative) (Details)
$ in Millions
 12 Months Ended
Feb. 28, 2018
USD ($)
Aug. 18, 2017
USD ($)
state
Dec. 22, 2015
USD ($)
May 31, 2018
Lessor Group [Member]        
Business Acquisition [Line Items]        
Effective acquisition date       Feb. 28, 2018
Purchase price $ 162.5      
Cash acquired 13.4      
Goodwill acquired $ 111.5      
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 acquired   $ 51.1    
HR Outsourcing Holdings, Inc. [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Number of states in which HR Solutions services are provided | state   35    
Advance Partners [Member]        
Business Acquisition [Line Items]        
Effective acquisition date       Dec. 22, 2015
Purchase price     $ 190.5  
Settlement of debt     118.4  
Cash acquired     12.8  
Accounts receivable balances acquired, net     164.8  
Goodwill acquired     $ 95.6