Industry Segment Information (Schedule Of Financial Information Attributable To The Reporting Segments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Revenue from External Customers	$ 3,095.7	$ 3,166.9		$ 2,808.3
Net Sales	3,095.7	3,166.9	2,808.3	2,808.3
Gross Profit	783.2	771.0	666.0
Operating Expenses	494.2	458.2	410.3
Income From Operations	208.0	312.8	255.7	255.7
Capital Expenditures	82.7	91.0	57.6	57.6
Intersegment sales	0	0		0
Assets	3,643.5	3,569.1	3,266.5
Depreciation, Depletion and Amortization	128.5	126.0		98.2
Electrical Segment [Member]
Segment Reporting Information [Line Items]
Revenue from External Customers	2,836.7	2,870.2		2,533.3
Net Sales	2,841.1	2,873.7		2,542.1
Gross Profit	714.4	691.7	590.9
Operating Expenses	456.9	418.0	368.4
Income From Operations	188.6	273.7		222.6
Capital Expenditures	74.3	82.2		53.8
Intersegment sales	4.4	3.5		8.8
Assets	3,429.2	3,323.6	3,139.3
Depreciation, Depletion and Amortization	115.8	114.0		92.0
Mechanical Segment [Member]
Segment Reporting Information [Line Items]
Revenue from External Customers	259.0	296.7		275.0
Net Sales	264.0	300.6		277.5
Gross Profit	68.8	79.3	75.1
Operating Expenses	37.3	40.2	41.9
Income From Operations	19.4	39.1		33.1
Capital Expenditures	8.4	8.8		3.8
Intersegment sales	5.0	3.9		2.5
Assets	214.3	245.5	127.2
Depreciation, Depletion and Amortization	12.7	12.0		6.2
Business Intersegment, Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from External Customers	0	0		0
Net Sales	(9.4)	(7.4)		(11.3)
Gross Profit	0	0	0
Operating Expenses	0	0	0
Income From Operations	0	0		0
Capital Expenditures	0	0		0
Intersegment sales	(9.4)	(7.4)		(11.3)
Assets	0	0	0
Depreciation, Depletion and Amortization		0		0
United States [Member]
Segment Reporting Information [Line Items]
Net Sales	2,017.6	2,127.2		1,798.2
Rest Of The World [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 1,078.1	$ 1,039.7		$ 1,010.1

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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