Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Aug. 31, 2014	May 31, 2014	Oct. 05, 2013 Lanx [Member]
Goodwill [Line Items]
Goodwill	$ 3,627.8	$ 3,634.4	$ 42.4
Intangible assets, expected amortization expense for the remainder of 2015	278.6
Intangible assets, expected amortization expense for the year 2016	273.7
Intangible assets, expected amortization expense for the year 2017	270.0
Intangible assets, expected amortization expense for the year 2018	252.6
Intangible assets, expected amortization expense for the year 2019	$ 246.6