Valuation and Qualifying Accounts Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 9.5	$ 10.1	$ 9.1	$ 9.7
Valuation Allowances and Reserves, Charged to Cost and Expense	(0.2)	1.2	(0.6)
Valuation Allowances and Reserves, Recoveries	(0.4)	(0.2)	0
Sales Returns and Allowances [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	52.0	52.8	45.6	36.8
Valuation Allowances and Reserves, Charged to Cost and Expense	108.8	104.4	84.1
Valuation Allowances and Reserves, Recoveries	$ (109.6)	$ (97.2)	$ (75.3)