Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Name:	us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions and Discontinued Operations - Sale of Transformers Solutions Business - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Oct. 02, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 01, 2021
Discontinued Operations
Gain on disposition of discontinued operations, net of tax			$ 360.7	$ (3.7)	$ (4.4)
Discontinued operations, disposed of by sale \| Transformer solutions
Discontinued Operations
Net consideration						$ 620.6
Gain on disposition of discontinued operations, net of tax	$ 24.5	$ 357.7	$ 382.2