Goodwill And Other Intangibles (Schedule Of Changes To Goodwill) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 29, 2013	Dec. 29, 2012
Goodwill [Line Items]
Beginning balance	$ 1,151.0	$ 1,105.0
Goodwill, Acquired During Period		25.9
Foreign Currency Translation Adjustments	(8.3)	7.5
Ending balance	1,142.7	1,151.0
Electrical Segment [Member]
Goodwill [Line Items]
Beginning balance	1,111.7	1,117.6
Goodwill, Acquired During Period		2.7
Foreign Currency Translation Adjustments	(8.0)	4.0
Ending balance	1,103.7	1,111.7
Mechanical Segment [Member]
Goodwill [Line Items]
Beginning balance	39.3	12.6
Goodwill, Acquired During Period		23.2
Foreign Currency Translation Adjustments	(0.3)	3.5
Ending balance	$ 39.0	$ 39.3