Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011	Dec. 30, 2011
Segment Reporting Information [Line Items]
Segment revenue	$ 504,763	$ 417,433	$ 1,524,590	$ 1,208,895
Operating income (loss)	118,374	80,137	347,142	247,404
Accounts receivable	320,904		320,904		275,201
Inventories	234,301		234,301		232,063
Goodwill	1,551,886		1,551,886		1,297,692
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Segment revenue	287,244	241,106	820,304	667,808
Operating income (loss)	68,451	42,634	168,001	112,400
Accounts receivable	175,254		175,254		160,218
Inventories	141,600		141,600		128,433
Goodwill	927,462		927,462		697,237
Field Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	102,993	91,106	373,863	318,188
Operating income (loss)	36,021	31,030	145,005	126,078
Accounts receivable	79,425		79,425		63,542
Inventories	37,858		37,858		51,756
Goodwill	67,899		67,899		68,268
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Segment revenue	83,830	58,101	243,615	142,747
Operating income (loss)	8,218	2,503	21,200	(1,515)
Accounts receivable	45,067		45,067		36,465
Inventories	37,507		37,507		31,262
Goodwill	530,835		530,835		508,260
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Segment revenue	30,696	27,120	86,808	80,152
Operating income (loss)	5,684	3,970	12,936	10,441
Accounts receivable	21,158		21,158		14,976
Inventories	17,336		17,336		20,612
Goodwill	$ 25,690		$ 25,690		$ 23,927