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Basis of Presentation and Summary of Significant Accounting Policies - Prepaid expenses and other current assets (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Restricted cash | $ 0.1 |
Prepaid income taxes | $ 14.4 | $ 10.4
Maximum |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Restricted cash |  | $ 0.1

X
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