Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts Receivable, allowances (in dollars)	$ 16.9	$ 19.4
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	163,175,928	163,175,928
Common stock, shares outstanding (in shares)	136,617,161	135,543,869
Treasury stock, shares (in shares)	26,558,767	27,632,059