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Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Goodwill [Roll Forward] |  |
Beginning balance | $ 218.8 | $ 233.9
Beginning balance, accumulated impairment losses | (36.8) | (40.8)
Beginning balance, net | 182.0 | 193.1
Foreign currency fluctuations | 1.9 | (15.1)
Foreign currency fluctuations, accumulated impairment losses | 3.5 | 4.0
Foreign currency fluctuations, net | 5.4 | (11.1)
Ending balance | 220.7 | 218.8
Ending balance, accumulated impairment losses | (33.3) | (36.8)
Ending balance, net | $ 187.4 | $ 182.0

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