CONDENSED CONSOLIDATED STOCKHOLDERS' EQUITY STATEMENT (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Statement Of Stockholders Equity [Abstract]
Amortization of pension and other postretirement benefit plan losses, tax	$ 0.7	$ 0	$ 2.2	$ 0
Dividends declared per share	$ 0.05	$ 0.05	$ 0.15	$ 0.15