Employee Benefit Plans (Tables)

3 Months Ended

Aug. 31, 2011

Schedule of Net Benefit Costs [Table Text Block]

	Pension Plans Three months ended August 31,						Post-Retirement Benefits Three months ended August 31,
	2011			2010			2011			2010
Components of net periodic benefit costs:
Service cost	$	—		$	0.1		$	0.0		$	—
Interest cost		2.1			2.2			0.5			0.5
Expected return on assets		(2.7	)		(2.4	)		—			—
Net amortization of prior service credit		—			—			(0.2	)		(0.2	)
Amortization of loss		0.3			0.5			1.0			0.5
Net periodic benefit costs	$	(0.3	)	$	0.4		$	1.3		$	0.8