Valuation And Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 5.4	$ 5.4	$ 5.0
Charged to Costs and Expenses	2.8	3.9	3.6
Deductions	(2.8)	(3.9)	(3.2)
Balance at End of Period	5.4	5.4	5.4
Reserve for Sales Returns [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	4.4	4.5	3.2
Charged to Costs and Expenses	35.0	33.2	32.0
Deductions	(34.3)	(33.3)	(30.7)
Balance at End of Period	$ 5.1	$ 4.4	$ 4.5