Goodwill and Other Intangible Assets, net - Changes in Goodwill (Details) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($)
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2020	$ 1,923.3
Prior year acquisitions	4.1
Foreign currency translation	(3.0)
BALANCE MARCH 31, 2021	1,924.4
Electrical Solutions
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2020	663.9
Prior year acquisitions	0.0
Foreign currency translation	0.2
BALANCE MARCH 31, 2021	664.1
Utility Solutions
Goodwill [Roll Forward]
BALANCE DECEMBER 31, 2020	1,259.4
Prior year acquisitions	4.1
Foreign currency translation	(3.2)
BALANCE MARCH 31, 2021	$ 1,260.3

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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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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