Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Feb. 29, 2012	May 31, 2011
Allowance for doubtful receivables	$ 38.5	$ 38.2
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	740,000,000	740,000,000
Common stock, shares issued	552,331,876	552,531,316
Common stock, shares outstanding	552,331,876	552,531,316
Biomet, Inc. [Member]
Allowance for doubtful receivables	$ 38.5	$ 38.2
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	1,000	1,000
Common stock, shares outstanding	1,000	1,000