Basis of Presentation and Nature of Operations (Details) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	Dec. 20, 2020 $ / shares	Sep. 30, 2022 USD ($) $ / shares	Sep. 30, 2021 $ / shares	Sep. 30, 2022 USD ($) segment $ / shares	Sep. 30, 2021 $ / shares	Jun. 30, 2022	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($) $ / shares	Jan. 01, 2021 USD ($) $ / shares	Jan. 01, 2020 USD ($)	Jan. 01, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of operating segments | segment				2
Conversion price (in dollars per share) | $ / shares	$ 51.00								$ 56.00
Cash dividends paid per share (in dollars per share) | $ / shares	$ 5.00	$ 0	$ 0	$ 0	$ 5.00
Other capital		$ (505.1)		$ (505.1)				$ (578.1)	$ (20.9)	$ (20.9)	$ (20.9)
Retained earnings		$ (160.4)		$ (160.4)				$ (102.6)	$ 7.8	$ (8.0)	$ (7.9)
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax liabilities							$ 1.9
Other capital							5.6
Retained earnings							1.0
Long-term debt							$ 8.5
2 1/4% Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Conversion price (in dollars per share) | $ / shares								$ 26.00
2 1/4% Notes | Convertible Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument interest rate stated percentage		2.25%	2.25%	2.25%	2.25%	2.25%
Long-term debt		$ 0.0		$ 0.0				$ 145.9