CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 55.4	$ 67.9
Property, plant and equipment, accumulated depreciation	661.8	667.8
Intangible assets, accumulated amortization	$ 615.7	$ 584.9
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)	91,500,000	91,500,000
Common stock, outstanding (in shares)	91,100,000	91,100,000