Goodwill and Other Intangible Assets, net - Changes in Goodwill (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2019	$ 1,811.8
Prior year acquisitions	3.4
Foreign currency translation	(8.1)
BALANCE MARCH 31, 2020	1,807.1
Electrical
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2019	727.7
Prior year acquisitions	0.0
Foreign currency translation	(4.4)
BALANCE MARCH 31, 2020	723.3
Utility Solutions
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2019	1,084.1
Prior year acquisitions	3.4
Foreign currency translation	(3.7)
BALANCE MARCH 31, 2020	$ 1,083.8

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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