Goodwill and Intangible Assets, net (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2014	$ 874.7
Current year acquisitions (Note 2 – Business Acquisitions)	54.5
Foreign currency translation and prior year acquisitions	(0.7)
BALANCE SEPTEMBER 30, 2015	928.5
Electrical
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2014	568.9
Current year acquisitions (Note 2 – Business Acquisitions)	42.7
Foreign currency translation and prior year acquisitions	(0.1)
BALANCE SEPTEMBER 30, 2015	611.5
Power
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2014	305.8
Current year acquisitions (Note 2 – Business Acquisitions)	11.8
Foreign currency translation and prior year acquisitions	(0.6)
BALANCE SEPTEMBER 30, 2015	$ 317.0