Goodwill And Intangible Assets (Schedule Of Changes To Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Goodwill [Line Items]
Goodwill	$ 1,117,549	$ 775,371	$ 663,920
Acquisitions		101,915
Translation Adjustments	(8,287)	9,536
Net Acquisitions	350,465
Electrical Segment [Member]
Goodwill [Line Items]
Goodwill	1,104,957	763,135	663,920
Acquisitions		90,875
Translation Adjustments	(8,578)	8,340
Net Acquisitions	350,400
Mechanical Segment [Member]
Goodwill [Line Items]
Goodwill	12,592	12,236
Acquisitions		11,040
Translation Adjustments	291	1,196
Net Acquisitions	$ 65

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details