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Summary of Significant Accounting policies - Equity Method Investments (Details) - Investment In Promon A - USD ($)
$ in Millions
Jan. 31, 2022
Jan. 30, 2022
Equity Method Investments    
Equity Method Investment, Amount Sold $ 18.9  
Equity Method Investment, Realized Gain (Loss) on Disposal, Statement of Income [Extensible Enumeration] Other Nonoperating Income (Expense)  
Equity Method Investment, Realized Gain (Loss) on Disposal $ 14.8  
Ownership percentage   17.00%