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Basis of Presentation - Additional Information (Detail) $ in Millions, ¥ in Billions	3 Months Ended
	Sep. 30, 2015 USD ($) ¥ / $	Sep. 30, 2015 JPY (¥) ¥ / $
Accounting Policies [Abstract]
Net gain (loss) on foreign currency transactions	$ (3.1)
Foreign currency forward contracts outstanding amount	$ 60.5	¥ 7.3
Average exchange rate of foreign currency forward contracts | ¥ / $	120.51	120.51
Foreign currency transaction gain (loss) unrealized	$ 1.7

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