Goodwill (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Dec. 31, 2011 MWM Acoustics [Member]	Dec. 31, 2011 MWM Acoustics [Member]	Dec. 31, 2012 Interchain Solution Private Limited [Member]	Dec. 31, 2012 Interchain Solution Private Limited [Member]
Goodwill [Line Items]
Increase in goodwill	$ 0	$ 79.8	$ 0.6	$ 0.6