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Significant Accounting Policies - Impairment of Long-lived Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Impairment of Long-lived Assets      
Impairments of long-lived assets $ 0.0 $ 0.0 $ 0.0