CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Account Receivables, allowances	$ 1.0	$ 1.7
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares outstanding (in shares)	49,000,000	48,900,000