CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 56.2	$ 67.9
Property, plant and equipment, accumulated deprecation	629.7	667.8
Intangible assets, accumulated amortization	$ 641.6	$ 584.9
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,000,000	1,000,000.0
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	120,000,000.0	120,000,000.0
Common stock, issued (in shares)	91,600,000	91,600,000
Common stock, outstanding (in shares)	91,200,000	91,200,000