Discontinued Operations - Results of Discontinued Operations (Details) - Discontinued Operations, Disposed of by Sale - RX Pharmaceuticals - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 0.0	$ 405.1	$ 975.0
Cost of sales	0.0	258.4	645.1
Gross profit	0.0	146.7	329.9
Distribution	0.0	6.1	15.2
Research and development	0.0	30.8	54.8
Selling	0.0	16.3	30.1
Administration	4.6	36.4	31.8
Impairment charges	0.0	0.0	346.8
Restructuring charges	0.0	0.0	0.3
Other operating expense (income)	0.0	(0.4)	0.7
Total operating expenses	4.6	89.2	479.7
Operating income	(4.6)	57.5	(149.8)
Interest expense, net	0.0	0.8	3.5
Other (income) expense, net	0.0	(1.6)	2.0
Income before income taxes	(4.6)	58.3	(155.3)
Gain on disposal of discontinued operations before tax	0.0	(47.5)	0.0
Income (loss) from discontinued operation, before income tax	(4.6)	105.8	(155.3)
Income tax expense	5.1	43.8	51.5
Income (loss) from discontinued operations, net of tax	$ (9.7)	$ 62.0	$ (206.8)