Goodwill and Other Identifiable Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 2,279.1
Acquisitions/divestitures	14.4
Foreign currency translation/other	(2.7)
Ending Balance	2,290.8
Enclosures
Goodwill [Roll Forward]
Beginning Balance	315.4
Acquisitions/divestitures	0.5
Foreign currency translation/other	(0.2)
Ending Balance	315.7
Thermal Management
Goodwill [Roll Forward]
Beginning Balance	925.5
Acquisitions/divestitures	0.0
Foreign currency translation/other	(2.5)
Ending Balance	923.0
Electrical & Fastening Solutions
Goodwill [Roll Forward]
Beginning Balance	1,038.2
Acquisitions/divestitures	13.9
Foreign currency translation/other	0.0
Ending Balance	$ 1,052.1

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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-Name Accounting Standards Codification
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Amount of increase (decrease), classified as other, of an asset representing the future economic benefits 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.

+ References

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