Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Feb. 28, 2013

Derivative Instruments and Hedging Activities

Schedule of fair value carrying amount of our interest rate derivatives

		Derivative		Derivative
Derivatives designated		Assets		Liabilities
as hedging instruments	Balance Sheet Classification	February 28, 2013		February 28, 2013
Interest rate cap	Long-term assets	$	0.1	$	—
Interest rate swap	Long-term liabilities	—		(4.4		)

		Derivative		Derivative
Derivatives designated		Assets		Liabilities
as hedging instruments	Balance Sheet Classification	May 31, 2012		May 31, 2012
Interest rate cap	Long-term assets	$	0.2	$	—
Interest rate swap	Long-term liabilities	—		(4.5		)