Segment Reporting - Long-Term Assets by Geography (Detail) (USD $) In Millions, unless otherwise specified	Aug. 31, 2014		May 31, 2014		May 31, 2013
Long-term assets by geography:
Long-term assets	$ 723.3	[1]	$ 716.0	[1]	$ 665.2	[1]
United States
Long-term assets by geography:
Long-term assets	409.3	[1]	396.9	[1]	336.8	[1]
Europe
Long-term assets by geography:
Long-term assets	185.8	[1]	241.4	[1]	255.7	[1]
International
Long-term assets by geography:
Long-term assets	$ 128.2	[1]	$ 77.7	[1]	$ 72.7	[1]

[1] Defined as property, plant and equipment