Acquisitions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended				6 Months Ended
	Sep. 30, 2013	Dec. 31, 2013 Entity	Dec. 31, 2012 Entity	Jun. 30, 2013	Jul. 31, 2013 Bonaire [Member]	Dec. 31, 2013 Bonaire [Member] Software Technology [Member]	Dec. 31, 2013 Bonaire [Member] Customer Relationships [Member]
Business Acquisition [Line Items]
Number of businesses acquired		1	0
Reduction in fair value of contingent consideration	$ 3.3
Purchase price of acquired entity					37.7
Net liabilities assumed					1.6
Liability for fair value of potential additional cash payments					0.5
Goodwill from acquisition		812.9		778.4	29.2
Intangible assets acquired					$ 10.1
Finite-lived intangible assets, remaining amortization period, years						7 years	10 years