Registration of securities issued in business combination transactions

Description of Organization and Business Operations - Additional Information (Detail)

v3.21.2
Description of Organization and Business Operations - Additional Information (Detail) - USD ($)
 6 Months Ended 12 Months Ended
Jul. 02, 2020
Jun. 30, 2020
Jun. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Organization And Business Operations [Line Items]            
Deposit to trust account   $ 750,000,000        
Percentage of public shares required to repurchase if business combination is not completed within specified period     100.00% 100.00%    
Balance in trust account     $ 750,089,714 $ 750,067,041    
Accrued dividends     $ 3,758 $ 3,883   $ 0
Percentage of fair market value to that of balance in the trust account     80.00% 80.00%    
Interest to pay dissolution expenses     $ 100,000 $ 100,000    
Period from closing of public offering to complete business combination     24 months 24 months    
Cash     $ 799,624 $ 383,246   $ 5,000
Common Class A [Member]            
Organization And Business Operations [Line Items]            
Shares issued during the period,shares     75,000,000 75,000,000    
Common stock, par value $ 0.0001   $ 0.0001 $ 0.0001 $ 0.0001 $ 0.0001
Common Class B [Member]            
Organization And Business Operations [Line Items]            
Common stock, par value     $ 0.0001 $ 0.0001   $ 0.0001
Mirion Technologies and the charter parties [Member]            
Organization And Business Operations [Line Items]            
Business combination consideration transferred     $ 1,700,000,000      
Mirion Technologies and the charter parties [Member] | PIPE Investors [Member] | Common Class A [Member]            
Organization And Business Operations [Line Items]            
Business acquisition equity interest issued or issuable, number of shares     90,000,000      
Business acquisition, equity interest issued or issuable value assigned     $ 900,000,000      
Mirion Technologies and the charter parties [Member] | Minimum Cash Condition [Member]            
Organization And Business Operations [Line Items]            
Cash     50,000,000      
Mirion Technologies and the charter parties [Member] | Minimum Cash Condition [Member] | Common Class A [Member]            
Organization And Business Operations [Line Items]            
Payments to acquire businesses gross     $ 1,310,000,000      
Common stock, par value     $ 0.01      
Mirion Technologies and the charter parties [Member] | Minimum Cash Condition [Member] | Common Class B [Member]            
Organization And Business Operations [Line Items]            
Common stock, par value     $ 0.01      
Asset Held in Trust [Member]            
Organization And Business Operations [Line Items]            
Accrued dividends     $ 3,758 $ 3,883    
IPO [Member]            
Organization And Business Operations [Line Items]            
Shares issued during the period,shares 75,000,000          
IPO [Member] | Common Class A [Member]            
Organization And Business Operations [Line Items]            
Common stock, par value     $ 0.0001 $ 0.0001    
Underwriter Option [Member] | IPO [Member]            
Organization And Business Operations [Line Items]            
Shares issued during the period,shares 5,000,000          
Maximum [Member]            
Organization And Business Operations [Line Items]            
Payment of deferred underwriting commissions     $ 5,000,001 $ 5,000,001    
Minimum [Member] | Mirion Technologies and the charter parties [Member] | Minimum Cash Condition [Member]            
Organization And Business Operations [Line Items]            
Payments to acquire businesses gross     $ 1,310,000,000