Goodwill and Intangible Assets, net (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2015	$ 928.5
Current year acquisitions (Note 2 – Business Acquisitions)	64.7
Foreign currency translation and prior year acquisitions	(0.8)
BALANCE MARCH 31, 2016	992.4
Electrical
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2015	611.2
Current year acquisitions (Note 2 – Business Acquisitions)	47.7
Foreign currency translation and prior year acquisitions	(1.3)
BALANCE MARCH 31, 2016	657.6
Power
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2015	317.3
Current year acquisitions (Note 2 – Business Acquisitions)	17.0
Foreign currency translation and prior year acquisitions	0.5
BALANCE MARCH 31, 2016	$ 334.8