Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Trade accounts receivable, allowance	$ 7.4	$ 7.5
Preferred stock, par value (in usd per share)	$ 0.01
Preferred stock, authorized (in shares)	50,000,000
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	300,000,000	300,000,000
Common stock, outstanding (in shares)	72,898,291	72,850,268
Series A
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	10,000,000	10,000,000
Preferred stock, outstanding (in shares)	0	0