Changes in Accumulated Other Comprehensive Income by Component - Summary of Changes in Accumulated Balances for Each Component of Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	$ 4.2
Other comprehensive loss before reclassifications	(1.8)
Amounts reclassified from accumulated other comprehensive income	0.1
Balance, ending	2.5
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	7.6
Other comprehensive loss before reclassifications	(1.7)
Amounts reclassified from accumulated other comprehensive income
Balance, ending	5.9
Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	1.1
Other comprehensive loss before reclassifications	(0.1)
Amounts reclassified from accumulated other comprehensive income
Balance, ending	1.0
Pension and Post-Retirement Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning	(4.5)
Other comprehensive loss before reclassifications
Amounts reclassified from accumulated other comprehensive income	0.1
Balance, ending	$ (4.4)