Annual report pursuant to Section 13 and 15(d)

Funds Held for Clients and Corporate Investments (Details)

 v2.3.0.11
Funds Held for Clients and Corporate Investments (Details) (USD $)
In Millions
12 Months Ended
May 31, 2011
May 31, 2010
Type of issue:    
Money market securities and other cash equivalents, Amortized cost $ 1,372.9 $ 1,754.5
Money market securities and other cash equivalents, Fair value 1,372.9 1,754.5
Available-for-sale securities:    
Amortized cost 2,677.9 2,085.2
Gross unrealized gains 59.4 67.0
Gross unrealized losses (0.1) (0.4)
Fair value 2,737.2 2,151.8
Other, Amortized cost 8.3 7.5
Other, Gross unrealized gains 0.6  
Other, Gross unrealized losses   (0.2)
Other, Fair value 8.9 7.3
Total funds held for clients and corporate investments, Amortized cost 4,059.1 3,847.2
Total funds held for clients and corporate investments, Gross unrealized gains 60.0 67.0
Total funds held for clients and corporate investments, Gross unrealized losses (0.1) (0.6)
Total funds held for clients and corporate investments, fair value 4,119.0 3,913.6
Securities in unrealized loss position    
Less than 12 months, Gross unrealized loss (0.1) (0.4)
Less than 12 months, Fair value 51.7 73.6
More than 12 months, Gross unrealized loss 0  
More than 12 months, Fair value 0 0
Total, Gross unrealized loss (0.1) (0.4)
Total, Fair value 51.7 73.6
Classification of investments on the Consolidated Balance Sheets    
Funds held for clients 3,566.7 3,541.0
Corporate investments 345.0 82.5
Long-term corporate investments 207.3 290.1
Total funds held for clients and corporate investments, fair value 4,119.0 3,913.6
General obligation municipal bonds [Member]
   
Available-for-sale securities:    
Amortized cost 1,017.5 951.1
Gross unrealized gains 33.1 33.7
Gross unrealized losses (0.1) (0.3)
Fair value 1,050.5 984.5
Securities in unrealized loss position    
Less than 12 months, Gross unrealized loss (0.1) (0.3)
Less than 12 months, Fair value 37.3 44.0
More than 12 months, Gross unrealized loss 0  
More than 12 months, Fair value 0 0
Total, Gross unrealized loss (0.1) (0.3)
Total, Fair value 37.3 44.0
Pre-refunded municipal bonds [Member]
   
Available-for-sale securities:    
Amortized cost 470.5 539.8
Gross unrealized gains 14.2 19.5
Fair value 484.7 559.3
Securities in unrealized loss position    
Less than 12 months, Fair value 0 4.1
More than 12 months, Fair value 0 0
Total, Fair value 0 4.1
Revenue municipal bonds [Member]
   
Available-for-sale securities:    
Amortized cost 361.6 368.0
Gross unrealized gains 12.1 13.8
Gross unrealized losses   (0.1)
Fair value 373.7 381.7
Securities in unrealized loss position    
Less than 12 months, Gross unrealized loss   (0.1)
Less than 12 months, Fair value 14.4 25.5
More than 12 months, Gross unrealized loss 0  
More than 12 months, Fair value 0 0
Total, Gross unrealized loss   (0.1)
Total, Fair value 14.4 25.5
Variable rate demand notes [Member]
   
Available-for-sale securities:    
Amortized cost 828.3 226.3
Fair value $ 828.3 $ 226.3