Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011	Dec. 30, 2011
Segment Reporting Information [Line Items]
Segment revenue	$ 517,560	$ 407,169	$ 1,019,827	$ 791,462
Operating income (loss)	115,633	89,453	228,768	167,266
Accounts receivable	317,280		317,280		275,201
Inventories	227,948		227,948		232,063
Goodwill	1,522,485		1,522,485		1,297,692
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Segment revenue	284,175	236,668	533,060	426,702
Operating income (loss)	59,473	46,987	99,550	69,766
Accounts receivable	185,715		185,715		160,218
Inventories	129,874		129,874		128,433
Goodwill	902,664		902,664		697,237
Field Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	123,371	104,029	270,870	227,082
Operating income (loss)	46,623	42,543	108,984	95,048
Accounts receivable	71,268		71,268		63,542
Inventories	44,064		44,064		51,756
Goodwill	66,948		66,948		68,268
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	81,402	40,224	159,785	84,645
Operating income (loss)	5,624	(2,684)	12,982	(4,018)
Accounts receivable	42,782		42,782		36,465
Inventories	35,577		35,577		31,262
Goodwill	527,950		527,950		508,260
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Segment revenue	28,612	26,248	56,112	53,033
Operating income (loss)	3,913	2,607	7,252	6,470
Accounts receivable	17,515		17,515		14,976
Inventories	18,433		18,433		20,612
Goodwill	$ 24,923		$ 24,923		$ 23,927

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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef

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

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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 Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

-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 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

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-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