Debt (Tables)

6 Months Ended

Nov. 30, 2011

Schedule of Debt [Table Text Block]

	Carrying Value			Fair Value			Carrying Value			Fair Value			Carrying Value			Fair Value
	November 30, 2011						May 31, 2011						November 30, 2010
Lines of Credit (weighted average interest rates of 3.7%, 6.7% and 4.0%, respectively)	$	5.7		$	5.7		$	0.7		$	0.7		$	7.2		$	7.2
Loan Agreement:
Revolving Loan		—			—			—			—			—			—
Term Loan (interest rates of n/a, 1.0% and 1.0%, respectively)		—			—			50.2			50.2			71.6			71.6
5% Notes due 2013, net of discount		152.7			153.8			152.5			156.6			152.4			154.8
Total debt	$	158.4		$	159.5		$	203.4		$	207.5		$	231.2		$	233.6
Less lines of credit, short-term debt and current portion of long-term debt		(5.7	)		(5.7	)		(43.5	)		(43.5	)		(50.0	)		(50.0	)
Total long-term debt	$	152.7		$	153.8		$	159.9		$	164.0		$	181.2		$	183.6

Schedule of Maturities Debt [Table Text Block]

2012	$	5.7
2013		152.7
Total debt	$	158.4