Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v3.3.1.900
Commitments and Contingencies (Details) - Line of Credit [Member]
$ in Millions
 6 Months Ended
Nov. 30, 2015
USD ($)
JP Morgan Chase Bank, N.A. [Member]  
Lines of credit  
Amount available $ 350
Expiration date Feb. 28, 2016
Bank of America, N.A. [Member]  
Lines of credit  
Amount available $ 250
Expiration date Feb. 28, 2016
PNC Bank, National Association [Member]  
Lines of credit  
Amount available $ 150
Expiration date Feb. 28, 2016
Wells Fargo Bank, National Association [Member]  
Lines of credit  
Amount available $ 150
Expiration date Feb. 28, 2016