Discontinued Operations - Schedule of Income From Discontinued Operations, Net of Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of taxes	$ 34.5	$ 21.2	$ 39.4
Commercial and Industrial Lighting Business | Discontinued Operations, Held-for-Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	509.4	503.5	644.5
Cost of goods sold	403.4	385.6	469.4
Gross profit	106.0	117.9	175.1
Selling & administrative expenses	88.5	85.1	111.2
Operating income	17.5	32.8	63.9
Other expense	(4.1)	(4.0)	(12.7)
Income from discontinued operations before income taxes	13.4	28.8	51.2
(Benefit) provision for income taxes	(21.1)	7.6	11.8
Income from discontinued operations, net of taxes	$ 34.5	$ 21.2	$ 39.4