Goodwill and Other Intangibles (Tables)

6 Months Ended

Nov. 30, 2018

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,			Twelve months ended May 31,			Six months ended November 30,
	2018			2018			2017
Gross beginning balance	$	158.8		$	158.5		$	158.5
Accumulated impairment	(39.6		)	(39.6		)	(39.6		)
Beginning balance	$	119.2		$	118.9		$	118.9
Foreign currency translation	(0.1		)	0.2			0.2
Other	—			0.1			—
Ending balance	$	119.1		$	119.2		$	119.1

Summary of Activity in Total Other Intangibles for the Periods Indicated

The following table summarizes the activity in other intangibles included in Other assets and deferred charges on the Company’s condensed consolidated balance sheets for the periods indicated:

	Six months ended November 30,			Twelve months ended May 31,			Six months ended November 30,
	2018			2018			2017
Beginning balance other intangibles subject to amortization	$	10.1		$	9.0		$	9.0
Additions	0.6			3.3			0.1
Amortization expense	(1.3		)	(2.1		)	(1.0		)
Foreign currency translation	(0.1		)	(0.1		)	0.1
Total other intangibles subject to amortization, net of accumulated amortization of $25.4, $24.1 and $22.9, respectively	$	9.3		$	10.1		$	8.2
Total other intangibles not subject to amortization	$	2.1		$	2.1		$	2.1
Total other intangibles	$	11.4		$	12.2		$	10.3