Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified	May 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Future minimum payment obligations under purchase orders and contractual arrangements, Due in Fiscal 2014	$ 59.1
Future minimum payment obligations under purchase orders and contractual arrangements, Due in Fiscal 2015	21.2
Future minimum payment obligations under purchase orders and contractual arrangements, Due in Fiscal 2016	7.0
Future minimum payment obligations under purchase orders and contractual arrangements, Due in Fiscal 2017	1.3
Future minimum payment obligations under purchase orders and contractual arrangements, Due in Fiscal 2018	0.1
Future minimum payment obligations under purchase orders and contractual arrangements, Due Thereafter	$ 0.4