Contingencies (Detail) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended	0 Months Ended	1 Months Ended					3 Months Ended	0 Months Ended
	Mar. 26, 2012 USD ($)	May 31, 2014 USD ($)	Jun. 05, 2014 Heraeus Litigation [Member] EUR (€)	Dec. 31, 2008 Heraeus Litigation [Member] EUR (€)	Aug. 31, 2014 All Products, Excluding Metal-On-Metal Hip Products [Member] USD ($)	May 31, 2014 All Products, Excluding Metal-On-Metal Hip Products [Member] USD ($)	Aug. 31, 2014 Metal-On-Metal Hip Products [Member] USD ($)	May 31, 2013 Metal-On-Metal Hip Products [Member] USD ($)	Aug. 31, 2014 Metal-On-Metal Hip Products [Member] Multi-District Litigation [Member] USD ($) claim	Sep. 30, 2014 Subsequent Event [Member] Multi-District Litigation [Member] claim	Sep. 26, 2014 Subsequent Event [Member] Multi-District Litigation [Member] USD ($)	Sep. 30, 2014 Subsequent Event [Member] Metal-On-Metal Hip Products [Member] claim
Loss Contingencies [Line Items]
Minimum time period for compliance with Deferred Prosecution Agreement	3 years
Minimum time period of international sales compliance monitor	18 months
Penalty paid	$ 5.6
Amount paid to settle claims	17.30		11.25								(50.00)
Claims filed										1,874		1,976
Minimum claims dismissed									450
Self insurance annual coverage limit		50.0
Third-party insurance coverage		100.0
Accrual amount for contingencies					34.0	39.1	123.5	123.5	123.5
Lawsuit seeking amount for damages				€ 30.0