Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
COLI asset	$ 11.1	$ 10.5
Level 2 | 2025 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Note, debt instrument	34.7	33.8
Level 2 | 2026 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Note, debt instrument	305.9	295.5
Money market funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 21.4	$ 8.4