Goodwill and Other Intangibles (Details) - Schedule of other intangible assets subject to amortization (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	May 31, 2013
Finite-Lived Intangible Assets [Line Items]
Total other intangibles subject to amortization	$ 11.4	$ 13.6	$ 12.6
Trademarks and other	2.0	2.0	2.0
Total other intangibles not subject to amortization	2.0	2.0	2.0
Total other intangibles	13.4	15.6	14.6
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Begining balance	3.4	4.3	4.3
Additions due to acquisition		0.1	0.1
Amortization expense	(0.5)	(0.5)	(1.0)
Foreign currency translation	0	0	0
Total other intangibles subject to amortization	2.9	3.9	3.4
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Begining balance	9.2	10.4	10.4
Additions due to acquisition			0.2
Amortization expense	(0.7)	(0.8)	(1.5)
Foreign currency translation	0
Other		0.1	0.1
Total other intangibles subject to amortization	$ 8.5	$ 9.7	$ 9.2