Divestitures and Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Sales	$ 0.0	$ 181.8	$ 349.3	$ 581.2
Cost of sales	0.0	136.2	262.9	432.9
Other costs and expenses	2.0	48.7	99.5	146.1
Income (loss) from discontinued operations before income taxes	(2.0)	(3.1)	(13.1)	2.2
Income tax expense (benefit)	1.5	(0.7)	(1.2)	0.2
Income (loss) from discontinued operations, net of tax	(3.5)	(2.4)	(11.9)	2.0
Impairment of discontinued operations	0.0	0.0	187.8	0.0
Provision for income taxes	0.6	0.0	(45.0)	0.0
Loss from sale / impairment of discontinued operations, net of tax	0.6	0.0	142.8	0.0
Net income (loss) from discontinued operations	$ (4.1)	$ (2.4)	$ (154.7)	$ 2.0