Debt And Credit Facilities - Interest Expense (Details) - Convertible Debt - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total interest expense	$ 15.5	$ 15.2
Convertible senior notes due 2028
Debt Instrument [Line Items]
Contractual interest expense:	3.4	0.0
Amortization of debt issuance costs:	1.0	0.0
Convertible senior notes due 2025
Debt Instrument [Line Items]
Contractual interest expense:	9.1	12.3
Amortization of debt issuance costs:	$ 2.0	$ 2.9