Commitments and Contingencies (Details) - Schedule for minimum future annual rental commitments (USD $) In Millions, unless otherwise specified	May 31, 2014	May 31, 2013
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	$ 32.1
2016	25.7
2017	19.2
2018	14.5
2019	8.1
Thereafter	14.1
Total minimum lease payments	113.7
Less minimum sublease income to be received	69.9
Minimum lease payments, net of sublease income	43.8
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015	0
2016	0
2017	0
2018	0
2019	0
Thereafter	0
Total minimum lease payments	0
Less minimum sublease income to be received	0
Minimum lease payments, net of sublease income	0
Less amount representing interest	0
Present value of net minimum capital lease payments	0
Less current maturities of capital lease obligations	0	0.2
Long-term capital lease obligations	$ 0	$ 57.5