Consolidated Stockholders' Equity Statements (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Stockholders Equity [Abstract]
Foreign currency translation, tax benefit	$ (2.2)	$ 0	$ 0
Adjustments to pension and postretirement liability, tax	$ 14.0	$ (3.2)	$ (4.8)
Dividends declared per share	$ 0.2	$ 0.2	$ 0.2