Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Description of Organization and Business Operations - Additional Information (Detail) - USD ($)
 9 Months Ended
Jul. 02, 2020
Jun. 30, 2020
Sep. 30, 2021
Dec. 31, 2020
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%  
Balance in trust account     $ 750,101,238  
Accrued dividends     $ 0 $ 3,883
Percentage of fair market value to that of balance in the trust account     80.00%  
Interest to pay dissolution expenses     $ 100,000  
Period from closing of public offering to complete business combination     24 months  
Cash     $ 195,542 $ 383,246
Common Class A [Member]        
Organization And Business Operations [Line Items]        
Shares issued during the period,shares     75,000,000  
Common stock, par value     $ 0.0001 $ 0.0001
Common Class B [Member]        
Organization And Business Operations [Line Items]        
Common stock, par value     $ 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] | 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  
Subscription Agreement [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  
Asset Held in Trust [Member]        
Organization And Business Operations [Line Items]        
Accrued dividends     $ 3,758  
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  
Underwriter Option [Member] | IPO [Member]        
Organization And Business Operations [Line Items]        
Shares issued during the period,shares 5,000,000      
Minimum [Member]        
Organization And Business Operations [Line Items]        
Payments to acquire businesses gross     $ 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