Discontinued Operations - Schedule of Income From Discontinued Operations, Net of Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of taxes	$ 77.7	$ 4.4
Discontinued Operations, Disposed of by Sale | Commercial and Industrial Lighting business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	29.1	122.2
Cost of goods sold	27.7	96.0
Gross profit	1.4	26.2
Selling & administrative expenses	10.7	19.9
Operating (loss) income	(9.3)	6.3
Gain on disposal of business	88.5	0.0
Other income (expense)	0.2	(0.6)
Income from discontinued operations before income taxes	79.4	5.7
Provision for income taxes	1.7	1.3
Income from discontinued operations, net of taxes	$ 77.7	$ 4.4