Contractual Commitments, Contingencies and Off-Balance Sheet Arrangements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			1 Months Ended	3 Months Ended	1 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jul. 31, 2014	Mar. 31, 2010 IT Services Agreement [Member] term	Sep. 30, 2014 IT Services Agreement [Member]	Mar. 31, 2014 EU IT Services Agreement [Member] term	Mar. 31, 2010 EU IT Services Agreement [Member] term	Sep. 30, 2014 EU 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		1
Renewal term option one (in months)				12 months			12 months
Number of renewal terms option two							1
Renewal term option two (in months)							24 months
Commitments under agreement					$ 425.9			$ 45.9
Equity Method Investment, Capital Commitment			7.5
Payments to Acquire Equity Method Investments	1.8	0
Equity Method Investment, Remaining Capital Commitment	$ 5.7