Contractual Commitments, Contingencies and Off-Balance Sheet Arrangements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2010 term	Mar. 31, 2014 term	Jul. 31, 2014
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Capital commitment					$ 7.5
Payment to acquire equity method investment	3.5	0
Remaining capital commitment	4.0
IT Services Agreement [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Expiration date on agreement			Jun. 30, 2022
Number of renewal terms option one			1
Renewal term option one (in months)			12 months
Commitments under agreement	426.8
EU IT Services Agreement [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Number of renewal terms option one				1
Renewal term option one (in months)				12 months
Commitments under agreement	$ 41.7
Number of renewal terms option two				1
Renewal term option two (in months)				24 months