Inventories (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Inventories (Textual) [Abstract]
Inventories at cost as per LIFO	$ 91.5	$ 96.0
Inventories at average cost or FIFO methods	214.3	144.2
LIFO expense (income) (less than $0.1 million in income in 2012)	(0.1)	0.9	(0.8)
Reserves for excess, slow moving and obsolete inventory	42.0	42.0
Inventories related to long-term contracts, before progress payments	40.8	34.1
Progress payments related to long-term contracts, noncurrent	$ 1.3	$ 1.5