Unaudited Proforma Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition, Pro Forma Information [Line Items]
Net sales	$ 7,893.4	$ 7,540.3
Net income	$ 274.4	$ 276.3
Earnings per share:
Basic	$ 2.19	$ 2.06
Diluted	$ 2.17	$ 2.05