Debt And Credit Facilities - Interest Expense (Details) - Convertible Debt - 2.375% convertible senior notes - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Contractual interest expense	$ 12.3	$ 12.3
Amortization of debt issuance costs	2.9	1.9
Amortization of debt discount	0.0	19.0
Total interest expense	$ 15.2	$ 33.2