BUSINESS SEGMENTS - Changes in Goodwill (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 764.6
Foreign currency translation	6.8
Goodwill, Ending Balance	771.4
Network and Security Solutions [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	405.0
Foreign currency translation	2.1
Goodwill, Ending Balance	407.1
Electrical and Electronic Solutions [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	181.0
Foreign currency translation	0.3
Goodwill, Ending Balance	181.3
Utility Power Solutions [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	178.6
Foreign currency translation	4.4
Goodwill, Ending Balance	$ 183.0