Financing Arrangements - Long-term debt (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financing Arrangements
Less debt issuance costs (deduction from debt liability)	$ (1.7)	$ (2.4)
Total long-term debt	298.3	147.6
Principal payments during each of the next five years and thereafter
2024	0.0
2025	0.0
2026	300.0
2027	0.0
2028	0.0
Line Of Credit Maturities On March 2026
Financing Arrangements
Total debt	$ 300.0	$ 150.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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