v3.24.0.1
Preferred Stock and Common Stock - Summary of Preferred Stock (Detail)
$ / shares in Units, $ in Millions
Dec. 31, 2020
USD ($)
$ / shares
shares
Class of Stock [Line Items]  
Shares Authorized 246,430,170
Shares Issued 237,047,550
Shares Outstanding 237,047,550
Aggregate Liquidation Value | $ $ 1,489.9
Carrying Value (Net of Issuance Costs) | $ $ 1,486.7
Series A  
Class of Stock [Line Items]  
Shares Authorized 54,811,930
Shares Issued 54,811,930
Shares Outstanding 54,811,930
Issuance Price/ Liquidation Price (Per Share) | $ / shares $ 1.0000
Aggregate Liquidation Value | $ $ 54.8
Carrying Value (Net of Issuance Costs) | $ $ 54.7
Series B  
Class of Stock [Line Items]  
Shares Authorized 18,133,240
Shares Issued 18,133,240
Shares Outstanding 18,133,240
Issuance Price/ Liquidation Price (Per Share) | $ / shares $ 2.0766
Aggregate Liquidation Value | $ $ 37.7
Carrying Value (Net of Issuance Costs) | $ $ 37.5
Series C  
Class of Stock [Line Items]  
Shares Authorized 13,580,260
Shares Issued 13,580,260
Shares Outstanding 13,580,260
Issuance Price/ Liquidation Price (Per Share) | $ / shares $ 4.0500
Aggregate Liquidation Value | $ $ 55.0
Carrying Value (Net of Issuance Costs) | $ $ 54.8
Series D  
Class of Stock [Line Items]  
Shares Authorized 25,303,070
Shares Issued 15,920,450
Shares Outstanding 15,920,450
Issuance Price/ Liquidation Price (Per Share) | $ / shares $ 4.2632
Aggregate Liquidation Value | $ $ 67.9
Carrying Value (Net of Issuance Costs) | $ $ 67.6
Series E  
Class of Stock [Line Items]  
Shares Authorized 78,543,890
Shares Issued 78,543,890
Shares Outstanding 78,543,890
Issuance Price/ Liquidation Price (Per Share) | $ / shares $ 6.7478
Aggregate Liquidation Value | $ $ 530.0
Carrying Value (Net of Issuance Costs) | $ $ 529.0
Series F  
Class of Stock [Line Items]  
Shares Authorized 33,686,160
Shares Issued 33,686,160
Shares Outstanding 33,686,160
Issuance Price/ Liquidation Price (Per Share) | $ / shares $ 11.8570
Aggregate Liquidation Value | $ $ 399.4
Carrying Value (Net of Issuance Costs) | $ $ 398.8
Series G  
Class of Stock [Line Items]  
Shares Authorized 22,371,620
Shares Issued 22,371,620
Shares Outstanding 22,371,620
Issuance Price/ Liquidation Price (Per Share) | $ / shares $ 15.4269
Aggregate Liquidation Value | $ $ 345.1
Carrying Value (Net of Issuance Costs) | $ $ 344.3