Quarterly report pursuant to Section 13 or 15(d)

Funds Held for Clients and Corporate Investments (Details 1)

v3.3.1.900
Funds Held for Clients and Corporate Investments (Details 1) - USD ($)
$ in Millions
Feb. 29, 2016
May. 31, 2015
Classification of investments on the Consolidated Balance Sheets    
Funds held for clients $ 4,717.2 $ 4,273.4
Corporate investments 74.1 366.6
Long-term corporate investments 428.6 399.8
Total funds held for clients and corporate investments, Fair value 5,219.9 5,039.8
Securities in an unrealized loss position    
Less than twelve months, Gross unrealized losses (0.2) (7.0)
Less than twelve months, Fair value 42.2 896.7
Twelve months or longer, Gross unrealized losses (0.2) (0.5)
Twelve months or longer, Fair value 16.2 26.3
Total, Gross unrealized losses (0.4) (7.5)
Total, Fair value 58.4 923.0
Corporate bonds [Member]    
Securities in an unrealized loss position    
Less than twelve months, Gross unrealized losses (0.2)  
Less than twelve months, Fair value 13.2  
Twelve months or longer, Gross unrealized losses 0.0  
Twelve months or longer, Fair value 0.0  
Total, Gross unrealized losses (0.2)  
Total, Fair value 13.2  
General obligation municipal bonds [Member]    
Securities in an unrealized loss position    
Less than twelve months, Gross unrealized losses 0.0 (3.8)
Less than twelve months, Fair value 6.3 535.1
Twelve months or longer, Gross unrealized losses (0.1) (0.5)
Twelve months or longer, Fair value 2.8 26.3
Total, Gross unrealized losses (0.1) (4.3)
Total, Fair value 9.1 561.4
Revenue municipal bonds [Member]    
Securities in an unrealized loss position    
Less than twelve months, Gross unrealized losses 0.0 (3.2)
Less than twelve months, Fair value 10.4 361.6
Twelve months or longer, Gross unrealized losses (0.1) 0.0
Twelve months or longer, Fair value 13.4 0.0
Total, Gross unrealized losses (0.1) (3.2)
Total, Fair value 23.8 $ 361.6
U.S. government agency securities [Member]    
Securities in an unrealized loss position    
Less than twelve months, Gross unrealized losses 0.0  
Less than twelve months, Fair value 12.3  
Twelve months or longer, Gross unrealized losses 0.0  
Twelve months or longer, Fair value 0.0  
Total, Gross unrealized losses 0.0  
Total, Fair value $ 12.3