Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable and returns		$ 18.7	$ 19.5
Amortizable intangible assets, accumulated amortization		169.3	166.3
Debt Issuance cost, unamortized	[1]	$ 8.5	$ 11.3
Preferred stock, par value		$ 0.01	$ 0.01
Preferred stock, shares authorized		25,000,000	25,000,000
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
Common stock, par value		$ 0.01	$ 0.01
Common stock, shares authorized		200,000,000	200,000,000
Common stock, shares, issued		107,129,051	112,670,514
Common stock, shares outstanding		105,640,003	111,911,290
Treasury stock, shares		1,489,048	759,224

[1] (1) The company has adopted ASU 2015-03 in the fourth quarter of 2015, see "Note 2. Significant Accounting Policies" for details.