Inventories Long term contracts percentage-of-completion accounting (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
INVENTORIES [Abstract]
Net decrease in operating income from the quarterly impact of revisions in contracts	$ 0.3	$ 0.2	$ 1.8	$ 2.6