Inventories (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Inventories (Textual) [Abstract]
Inventories at cost as per LIFO	$ 96.0	$ 98.9
Inventories at average cost or FIFO methods	144.2	107.8
LIFO Expense	0.9	0.8
LIFO Income			2.2
Reserves for excess, slow moving and obsolete inventory	42.0	27.2
Inventories before progress payments, related to long term contracts	34.1	27.8
Progress payments, related to long term contracts	$ 1.5	$ 1.0