Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Detail) - USD ($) $ in Millions	3 Months Ended
Apr. 01, 2016	Apr. 03, 2015	Jan. 01, 2016
Segment Reporting Information [Line Items]
Revenue	$ 583.0	$ 582.6
Consolidated segment operating income	29.9	39.5
Depreciation expense	9.1	8.7
Accounts receivable	377.8		$ 361.9
Inventories	255.5		261.1
Goodwill	2,128.4		2,106.4
Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Revenue	309.8	299.3
Accounts receivable	215.2		215.9
Inventories	176.1		178.0
Goodwill	1,161.9		1,140.1
Field Solutions [Member]
Segment Reporting Information [Line Items]
Revenue	106.0	115.3
Accounts receivable	73.3		57.1
Inventories	34.8		36.0
Goodwill	126.9		125.7
Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Revenue	136.3	128.2
Accounts receivable	70.0		69.6
Inventories	26.5		30.4
Goodwill	819.0		820.7
Advanced Devices [Member]
Segment Reporting Information [Line Items]
Revenue	30.9	39.8
Accounts receivable	19.3		19.3
Inventories	18.1		16.7
Goodwill	20.6		$ 19.9
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	107.2	113.3
Depreciation expense	5.2	5.3
Operating Segments [Member] \| Engineering And Construction [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	44.1	37.0
Depreciation expense	3.4	3.6
Operating Segments [Member] \| Field Solutions [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	33.9	40.6
Depreciation expense	0.3	0.3
Operating Segments [Member] \| Mobile Solutions [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	18.9	20.5
Depreciation expense	1.3	1.3
Operating Segments [Member] \| Advanced Devices [Member]
Segment Reporting Information [Line Items]
Consolidated segment operating income	10.3	15.2
Depreciation expense	$ 0.2	$ 0.1

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3-4)
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