Accumulated Other Comprehensive Income - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts of gain reclassified to consolidated statement of income	$ 0.1	$ 0	$ 0.4	[1]	$ (0.3)	[1]

[1] Amounts classified to cost of sales and selling, general and administrative expenses.