Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowances for receivables	$ 19.3	$ 19.2
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	50,728,522	50,583,870
Common stock, shares outstanding (in shares)	50,728,522	50,583,870
Treasury stock (in shares)	7,910,174	8,054,826