Business Combinations (Changes In Carrying Amount Of Goodwill By Operating Segment) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Goodwill [Line Items]
Balance as of fiscal year 2015	$ 2,106.4
Additions due to acquisitions and current year acquisitions' purchase price adjustments	9.0
Purchase price adjustments- prior years' acquisitions and others	(1.0)
Foreign currency translation adjustments	3.3
Divestitures	(6.6)
Balance as of the end of the third quarter of fiscal 2016	2,111.1
Engineering And Construction [Member]
Goodwill [Line Items]
Balance as of fiscal year 2015	1,140.1
Additions due to acquisitions and current year acquisitions' purchase price adjustments	9.0
Purchase price adjustments- prior years' acquisitions and others	(1.2)
Foreign currency translation adjustments	1.4
Divestitures	0.0
Balance as of the end of the third quarter of fiscal 2016	1,149.3
Field Solutions [Member]
Goodwill [Line Items]
Balance as of fiscal year 2015	125.7
Additions due to acquisitions and current year acquisitions' purchase price adjustments	0.0
Purchase price adjustments- prior years' acquisitions and others	0.1
Foreign currency translation adjustments	0.8
Divestitures	0.0
Balance as of the end of the third quarter of fiscal 2016	126.6
Mobile Solutions [Member]
Goodwill [Line Items]
Balance as of fiscal year 2015	820.7
Additions due to acquisitions and current year acquisitions' purchase price adjustments	0.0
Purchase price adjustments- prior years' acquisitions and others	0.1
Foreign currency translation adjustments	0.6
Divestitures	(6.6)
Balance as of the end of the third quarter of fiscal 2016	814.8
Advanced Devices [Member]
Goodwill [Line Items]
Balance as of fiscal year 2015	19.9
Additions due to acquisitions and current year acquisitions' purchase price adjustments	0.0
Purchase price adjustments- prior years' acquisitions and others	0.0
Foreign currency translation adjustments	0.5
Divestitures	0.0
Balance as of the end of the third quarter of fiscal 2016	$ 20.4