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Employee Benefit Plans - Fair Value Measurements (Details) - Quoted Prices in Active Markets for Identical Assets (Level 1) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Defined Benefit Plans |  |
Fair value of plan assets | $ 114.9 | $ 149.2
Cash |  |
Defined Benefit Plans |  |
Fair value of plan assets | 0.6 | 0.6
U.S. treasury bonds |  |
Defined Benefit Plans |  |
Fair value of plan assets | $ 30.1 | 22.7
Equity mutual funds |  |
Defined Benefit Plans |  |
Target allocation percentage of investments | 12.00% |
Fair value of plan assets | $ 13.2 | 15.2
Fixed income mutual funds |  |
Defined Benefit Plans |  |
Target allocation percentage of investments | 88.00% |
Fair value of plan assets | $ 71.0 | $ 110.7

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