Goodwill And Intangible Assets (Changes In Carrying Amount Of Goodwill By Operating Segment) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2012
Goodwill And Intangible Assets [Line Items]
Balance as of fiscal year end 2011	$ 1,297,692
Additions due to acquisitions	237,888
Purchase price adjustments	3,583
Foreign currency translation adjustments	(16,678)
Balance as of the first two quarters of 2012	1,522,485
Engineering And Construction [Member]
Goodwill And Intangible Assets [Line Items]
Balance as of fiscal year end 2011	697,237
Additions due to acquisitions	217,436
Purchase price adjustments	3,086
Foreign currency translation adjustments	(15,095)
Balance as of the first two quarters of 2012	902,664
Field Solutions [Member]
Goodwill And Intangible Assets [Line Items]
Balance as of fiscal year end 2011	68,268
Foreign currency translation adjustments	(1,320)
Balance as of the first two quarters of 2012	66,948
Mobile Solutions [Member]
Goodwill And Intangible Assets [Line Items]
Balance as of fiscal year end 2011	508,260
Additions due to acquisitions	19,374
Purchase price adjustments	497
Foreign currency translation adjustments	(181)
Balance as of the first two quarters of 2012	527,950
Advanced Devices [Member]
Goodwill And Intangible Assets [Line Items]
Balance as of fiscal year end 2011	23,927
Additions due to acquisitions	1,078
Foreign currency translation adjustments	(82)
Balance as of the first two quarters of 2012	$ 24,923