Quarterly report pursuant to Section 13 or 15(d)

Funds Held for Clients and Corporate Investments (Details)

v3.3.1.900
Funds Held for Clients and Corporate Investments (Details) - USD ($)
$ in Millions
Feb. 29, 2016
May. 31, 2015
Type of issue:    
Funds held for clients money market securities and other cash equivalents, Amortized cost $ 2,222.9 $ 1,430.0
Funds held for clients money market securities and other cash equivalents Gross unrealized gains 0.0 0.0
Funds held for clients money market securities and other cash equivalents Gross unrealized losses 0.0 0.0
Funds held for clients money market securities and other cash equivalents, Fair value 2,222.9 1,430.0
Available-for-sale securities:    
Amortized cost 2,922.2 3,582.0
Available-for-sale securities, Gross unrealized gain, before tax 61.4 21.1
Available-for-sale securities, Gross unrealized loss, before tax (0.4) (7.5)
Fair value 2,983.2 3,595.6
Other, Amortized cost 13.9 12.7
Other, Gross unrealized gains 0.5 1.5
Other, Gross unrealized losses (0.6) 0.0
Other, Fair value 13.8 14.2
Total funds held for clients and corporate investments, Amortized cost 5,159.0 5,024.7
Funds held for clients and corporate investments Gross unrealized gains 61.9 22.6
Funds held for clients and corporate investments Gross unrealized losses (1.0) (7.5)
Total funds held for clients and corporate investments, Fair value 5,219.9 5,039.8
Corporate bonds [Member]    
Available-for-sale securities:    
Amortized cost 108.9  
Available-for-sale securities, Gross unrealized gain, before tax 1.7  
Available-for-sale securities, Gross unrealized loss, before tax (0.2)  
Fair value 110.4  
General obligation municipal bonds [Member]    
Available-for-sale securities:    
Amortized cost 1,626.3 1,694.0
Available-for-sale securities, Gross unrealized gain, before tax 36.4 14.0
Available-for-sale securities, Gross unrealized loss, before tax (0.1) (4.3)
Fair value 1,662.6 1,703.7
Pre-refunded municipal bonds [Member]    
Available-for-sale securities:    
Amortized cost [1] 67.9 101.7
Available-for-sale securities, Gross unrealized gain, before tax [1] 1.8 1.0
Available-for-sale securities, Gross unrealized loss, before tax [1] 0.0 0.0
Fair value [1] 69.7 102.7
Revenue municipal bonds [Member]    
Available-for-sale securities:    
Amortized cost 930.6 960.7
Available-for-sale securities, Gross unrealized gain, before tax 20.8 6.1
Available-for-sale securities, Gross unrealized loss, before tax (0.1) (3.2)
Fair value 951.3 963.6
U.S. government agency securities [Member]    
Available-for-sale securities:    
Amortized cost 120.5  
Available-for-sale securities, Gross unrealized gain, before tax 0.7  
Available-for-sale securities, Gross unrealized loss, before tax 0.0  
Fair value 121.2  
Variable rate demand notes [Member]    
Available-for-sale securities:    
Amortized cost 68.0 825.6
Available-for-sale securities, Gross unrealized gain, before tax 0.0 0.0
Available-for-sale securities, Gross unrealized loss, before tax 0.0 0.0
Fair value $ 68.0 $ 825.6
[1] Pre-refunded municipal bonds are secured by an escrow fund of U.S. government obligations.