Discontinued Operations - Summary of the Results of the TSA and Supply Agreements (Details) - 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]
Purchase of inventory	$ 76.7	$ 2.4	$ 170.6
Discontinued Operations, Disposed of by Sale | RX Business | RX Pharmaceuticals
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase of inventory	55.9	18.4
Discontinued Operations, Disposed of by Sale | RX Pharmaceuticals
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from transition services agreement	8.9	3.6
Proceeds from supply and distribution agreements	105.7	28.7
Payments for supply arrangements	51.4	12.0
Discontinued Operations, Disposed of by Sale | RX Pharmaceuticals | Other Operating Expense (Income)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from transition services agreement	10.3	7.2
Discontinued Operations, Disposed of by Sale | RX Pharmaceuticals | Net Sales
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Product sales and royalty income from transition services agreement	$ 124.2	$ 60.6