Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 1.8	$ 5.5	$ 5.8
Additions Charged to Expenses	(0.7)	(0.6)	(0.2)
Acquired	0	0	0
Deductions Amounts Written Off	(0.2)	(3.0)	(0.1)
Foreign Exchange	(0.1)	(0.1)	0
Ending Balance	0.8	1.8	5.5
Allowance for Cash Discounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	4.0	4.3	4.1
Additions Charged to Expenses	57.7	52.9	49.8
Acquired	0.7	0	0
Deductions Amounts Written Off	(57.4)	(53.3)	(49.6)
Foreign Exchange	(0.1)	0.1	0
Ending Balance	4.9	4.0	4.3
Sales Returns and Allowances
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	10.1	9.7	10.3
Additions Charged to Expenses	51.7	40.1	39.0
Acquired	0.7	0	0
Deductions Amounts Written Off	(44.9)	(39.7)	(40.0)
Foreign Exchange	(0.1)	0	0.4
Ending Balance	$ 17.5	$ 10.1	$ 9.7