Goodwill and Other Intangibles (Tables)

6 Months Ended

Nov. 30, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Activity in Goodwill for the Periods Indicated

The following table summarizes the activity in Goodwill for the periods indicated: 

	Six months ended   November 30, 2014			Twelve months ended May 31, 2014			Six months ended   November 30, 2013
Gross beginning balance	$	178.7		$	178.7		$	178.7
Accumulated impairment	(34.2		)	(20.8		)	(20.8		)
Beginning balance	$	144.5		$	157.9		$	157.9
Impairment charge	—			(13.4		)	(13.4		)
Foreign currency translation	0.0			0.0			0.0
Gross ending balance	$	178.7		$	178.7		$	178.7
Accumulated impairment	(34.2		)	(34.2		)	(34.2		)
Ending balance	$	144.5		$	144.5		$	144.5

Summary of Activity in Total Other Intangibles for the Periods Indicated

The following table summarizes the activity in Total other intangibles for the periods indicated:

	Six months ended   November 30, 2014			Twelve months ended May 31, 2014			Six months ended   November 30, 2013
Beginning balance - customer lists	$	2.4		$	3.4		$	3.4
Additions	0.7			—			—
Amortization expense	(0.5		)	(1.0		)	(0.5		)
Foreign currency translation	0.0			0.0			0.0
Customer lists, net of accumulated amortization    of $3.7, $3.3 and $2.7, respectively	$	2.6		$	2.4		$	2.9
Beginning balance - other intangibles	$	7.6		$	9.2		$	9.2
Amortization expense	(0.7		)	(1.4		)	(0.7		)
Foreign currency translation	0.0			0.0			0.0
Other	—			(0.2		)	—
Other intangibles, net of accumulated amortization    of $14.1, $13.4 and $12.7, respectively	$	6.9		$	7.6		$	8.5
Total other intangibles subject to amortization	$	9.5		$	10.0		$	11.4
Trademarks and other	$	2.2		$	2.2		$	2.0
Total other intangibles not subject to   amortization	$	2.2		$	2.2		$	2.0
Total other intangibles	$	11.7		$	12.2		$	13.4