Goodwill and Other Intangible Assets, net - Changes in Goodwill (Details) $ in Millions	9 Months Ended
Sep. 30, 2021 USD ($)
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2020	$ 1,923.3
Prior year acquisitions	6.9
Current year dispositions	(1.9)
Foreign currency translation	(5.7)
BALANCE SEPTEMBER 30, 2021	1,922.6
Electrical Solutions
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2020	663.9
Prior year acquisitions	0.0
Current year dispositions	0.0
Foreign currency translation	(1.7)
BALANCE SEPTEMBER 30, 2021	662.2
Utility Solutions
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2020	1,259.4
Prior year acquisitions	6.9
Current year dispositions	(1.9)
Foreign currency translation	(4.0)
BALANCE SEPTEMBER 30, 2021	$ 1,260.4

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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