Business Combinations (Schedule Of Changes In Carrying Amount Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 30, 2011	Jan. 01, 2010
Goodwill [Line Items]
Beginning Balance	$ 828,737	$ 764,193
Additions due to acquisitions	202,447
Purchase price adjustments	(2,073)
Foreign currency translation adjustments	(24,151)
Ending Balance	1,297,692	764,193
Engineering And Construction [Member]
Goodwill [Line Items]
Beginning Balance	432,364	389,702
Additions due to acquisitions	37,977
Purchase price adjustments	(577)
Foreign currency translation adjustments	(20,198)
Ending Balance	697,237	389,702
Field Solutions [Member]
Goodwill [Line Items]
Beginning Balance	26,211	26,776
Foreign currency translation adjustments	(3,004)
Ending Balance	68,268	26,776
Mobile Solutions [Member]
Goodwill [Line Items]
Beginning Balance	348,166	333,265
Additions due to acquisitions	162,307
Purchase price adjustments	(1,519)
Foreign currency translation adjustments	(694)
Ending Balance	508,260	333,265
Advanced Devices [Member]
Goodwill [Line Items]
Beginning Balance	21,996	14,450
Additions due to acquisitions	2,163
Purchase price adjustments	23
Foreign currency translation adjustments	(255)
Ending Balance	23,927	14,450
Tekla Acquisition [Member]
Goodwill [Line Items]
Additions due to acquisitions	291,701
Purchase price adjustments	1,031
Tekla Acquisition [Member] \| Engineering And Construction [Member]
Goodwill [Line Items]
Additions due to acquisitions	246,640
Purchase price adjustments	1,031
Tekla Acquisition [Member] \| Field Solutions [Member]
Goodwill [Line Items]
Additions due to acquisitions	$ 45,061

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)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 1

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph l

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ 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