Foreign Currency Translation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2014	Sep. 30, 2013	Feb. 13, 2013	Feb. 12, 2013	Sep. 30, 2014 Venezuelan Subsidiary	Mar. 31, 2014 Venezuelan Subsidiary	Jan. 31, 2014 Venezuelan Subsidiary
Foreign Currency Translation [Line Items]
Foreign currency exchange rate					6.30	4.30	12.0	10.7	6.3
Foreign exchange loss	$ 5.8	$ 6.5	$ 7.4	$ 6.5
Asset, Reporting Currency Denominated, Value							$ 8