Financing Arrangements - Schedule of Convertible Debt (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt	$ 20.4	$ 44.9
Convertible Senior Notes due 2025
Debt Instrument [Line Items]
Principal	20.8	46.0
Less: Debt issuance costs, net of amortization	(0.4)	(1.1)
Total debt	$ 20.4	$ 44.9

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Balance Type:	credit
Period Type:	instant