Divestitures and Discontinued Operations - Results of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Sales	$ 173.9	$ 206.2	$ 349.3	$ 399.4
Cost of sales	131.0	152.2	262.9	296.7
Expenses	48.5	49.9	97.5	97.4
Income (loss) from discontinued operations before income taxes	(5.6)	4.1	(11.1)	5.3
Income tax expense (benefit)	(1.4)	0.8	(2.7)	0.9
Income (loss) from discontinued operations, net of tax	(4.2)	3.3	(8.4)	4.4
Impairment of discontinued operations	187.8	0.0	187.8	0.0
Provision for income taxes	(45.6)	0.0	(45.6)	0.0
Impairment of discontinued operations, net of tax	142.2	0.0	142.2	0.0
Net income (loss) from discontinued operations	$ (146.4)	$ 3.3	$ (150.6)	$ 4.4

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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