Debt - Schedule of Terms and Carrying Value of Debt Instrument (Detail) In Millions, unless otherwise specified			3 Months Ended				3 Months Ended					3 Months Ended									3 Months Ended				3 Months Ended			3 Months Ended				3 Months Ended
	Aug. 31, 2012 USD ($)	May 31, 2012 USD ($)	Aug. 31, 2012 Term loan facility, 25-Mar-15 [Member] USD ($)	Aug. 31, 2012 Term loan facility, 25-Mar-15 [Member] EUR (€)	May 31, 2012 Term loan facility, 25-Mar-15 [Member] USD ($)	May 31, 2012 Term loan facility, 25-Mar-15 [Member] EUR (€)	Aug. 31, 2012 Term loan facility, 25-Mar-15 [Member] Euro [Member]	Aug. 31, 2012 Term loan facility, 25-Mar-15 [Member] USD [Member]	Aug. 31, 2012 Term loan facility, 25-Jul-17 [Member] USD ($)	Aug. 31, 2012 Term loan facility, 25-Jul-17 [Member] Euro [Member]	Aug. 31, 2012 Term loan facility, 25-Jul-17 [Member] Euro [Member] EUR (€)	Aug. 31, 2012 Term loan facility, 25-Jul-17 [Member] USD [Member]	Aug. 31, 2012 Cash flow revolving credit facility, 25-Apr-17 [Member]	Aug. 31, 2012 Cash flow revolving credit facility, 25-Apr-17 [Member] USD/EUR [Member]	Aug. 31, 2012 Cash flow revolving credit facility, 25-Apr-17 [Member] USD [Member]	Aug. 31, 2012 Asset-based revolving credit facility [Member]	Aug. 31, 2012 Asset-based revolving credit facility [Member] USD [Member]	Aug. 31, 2012 Senior cash pay notes [Member] USD ($)	May 31, 2012 Senior cash pay notes [Member] USD ($)	Aug. 31, 2012 Senior cash pay notes [Member] USD [Member]	Aug. 31, 2012 Senior PIK toggle notes [Member] USD ($)	May 31, 2012 Senior PIK toggle notes [Member] USD ($)	Aug. 31, 2012 Senior PIK toggle notes [Member] USD [Member] Minimum [Member]	Aug. 31, 2012 Senior PIK toggle notes [Member] USD [Member] Maximum [Member]	Aug. 31, 2012 Senior subordinated notes [Member] USD ($)	May 31, 2012 Senior subordinated notes [Member] USD ($)	Aug. 31, 2012 Senior subordinated notes [Member] USD [Member]	Aug. 31, 2012 Senior notes [Member] USD ($)	Aug. 31, 2012 Senior notes [Member] USD [Member]	Aug. 31, 2012 European facilities [Member] EUR (€)	May 31, 2012 European facilities [Member] EUR (€)	Aug. 31, 2012 European facilities [Member] Euro [Member]	Aug. 31, 2012 Debt One [Member] USD ($)	May 31, 2012 Debt One [Member] USD ($)	Aug. 31, 2012 Debt Two [Member] USD ($)	May 31, 2012 Debt Two [Member] USD ($)	Aug. 31, 2012 Debt Three [Member] USD ($)
Debt Instrument [Line Items]
Debt Instruments variable rate basis							LIBOR + 3.00%	LIBOR + 3.00%		LIBOR + 4.00%		LIBOR + 3.75%		LIBOR + 2.00%	LIBOR + 2.00%		LIBOR + 1.25%															Interest Free
Debt Instruments Interest Rate																				10.00%			10.375%	11.125%			11.625%		6.50%
Debt Instruments,Maturity Date			Mar. 25, 2015	Mar. 25, 2015			Mar. 25, 2015		Jul. 25, 2017	Jul. 25, 2017			Apr. 25, 2017	Apr. 25, 2017		Sep. 25, 2013		Oct. 15, 2017			Oct. 15, 2017				Oct. 15, 2017			Aug. 01, 2020
Premium on notes	$ 2.2	$ 3.0
Total debt	$ 6,281.9	$ 5,827.8	$ 1,221.7	€ 202.1	$ 2,234.7	€ 835.6			$ 1,007.2		€ 631.3							$ 761.0	$ 761.0		$ 227.3	$ 771.0			$ 1,015.0	$ 1,015.0		$ 1,000.0		€ 2.5	€ 2.8		$ 3.1	$ 3.5	$ 253.3	$ 1,039.6	$ 791.1