SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 4.2	$ 3.5	$ 3.2
Charged to Cost and Expenses	8.4	1.6	0.6
Other Deductions	(3.3)	(0.9)	(0.3)
Balance at End of Year	9.3	4.2	3.5
Allowance For Volume And Early Payment Discount [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	12.1	14.6	15.7
Charged to Cost and Expenses	84.7	57.6	58.4
Other Deductions	(73.4)	(60.1)	(59.5)
Balance at End of Year	23.4	12.1	14.6
Allowance for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	53.1	54.5	57.8
Charged to Cost and Expenses	64.3	77.8	73.7
Other Deductions	(72.0)	(79.2)	(77.0)
Balance at End of Year	$ 45.4	$ 53.1	$ 54.5