SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 10.5	$ 9.3	$ 4.2
Charged to Cost and Expenses	2.2	2.8	8.4
Other Deductions	(1.6)	(1.6)	(3.3)
Balance at End of Year	11.1	10.5	9.3
Allowance For Volume And Early Payment Discounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	22.6	23.4	12.1
Charged to Cost and Expenses	80.1	51.6	84.7
Other Deductions	(79.7)	(52.4)	(73.4)
Balance at End of Year	23.0	22.6	23.4
Allowance for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	39.3	45.4	53.1
Charged to Cost and Expenses	64.5	48.5	64.3
Other Deductions	(56.6)	(54.6)	(72.0)
Balance at End of Year	$ 47.2	$ 39.3	$ 45.4