Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Cash & restricted stock dividends (in dollars per share)	$ 1.32	$ 1.15	$ 1.00
Foreign currency translation adjustment, tax	$ (0.1)	$ (0.2)	$ (0.1)
Change in pension benefits, tax	$ (0.5)