Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 9.2	$ 8.2
Inventory reserves	$ 18.8	$ 19.6
Preferred stock, par value per share (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value per share (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares, issued (in shares)	231,966,871	231,622,535
Common stock, shares, outstanding (in shares)	155,680,716	154,512,813
Treasury stock, shares (in shares)	76,286,155	77,109,722