Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Apr. 02, 2011
ASSETS
Property, plant and equipment, accumulated depreciation and amortization	$ 596.6	$ 605.4	$ 570.0
EQUITY:
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares authorized	1.0	1.0	1.0
Preferred stock, shares issued	0	0	0
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	200.0	200.0	200.0
Common stock, shares issued	82.1	81.0	87.5