Debt (Tables)

3 Months Ended

Aug. 31, 2013

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

The following table summarizes debt as of the dates indicated:

	Carrying Value			Fair Value			Carrying Value			Fair Value			Carrying Value			Fair Value
	August 31, 2013						May 31, 2013						August 31, 2012
Unsecured lines of credit (weighted average interest rates of 3.6%, 9.0% and 4.9%, respectively)	$	14.2		$	14.2		$	2.0		$	2.0		$	0.6		$	0.6
Loan Agreement:
Revolving Loan (interest rates of 1.4%, n/a and n/a, respectively)		15.0			15.0			—			—			—			—
Term Loan		—			—			—			—			—			—
5% Notes due 2013, net of discount		—			—			—			—			152.8			153.6
Total debt	$	29.2		$	29.2		$	2.0		$	2.0		$	153.4		$	154.2
Less lines of credit, short-term debt and current portion of long-term debt		(29.2	)		(29.2	)		(2.0	)		(2.0	)		(0.6	)		(0.6	)
Total long-term debt	$	—		$	—		$	—		$	—		$	152.8		$	153.6

Schedule of Maturities of Long-term Debt [Table Text Block]

The following table sets forth the maturities of the Company’s debt obligations as of August 31, 2013, for the twelve-month period ending August 31,

2014	$	29.2
2015		—
Total debt	$	29.2