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SHHL C Ordinary Shares - Additional Information (Detail) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Jul. 19, 2021
Mar. 31, 2021
Dec. 08, 2020
May 19, 2020
Nov. 04, 2019
Aug. 23, 2019
Mar. 31, 2021
May 31, 2020
Dec. 31, 2023
Jan. 01, 2023
Jan. 03, 2021
Dec. 29, 2019
Nov. 30, 2019
Aug. 31, 2019
Temporary Equity [Line Items]                            
Temporary equity interest rate percentage                 5.00%          
Proceeds from redeemable common stock net           $ 63                
Incurred share issuance costs           5                
SHHL [Member]                            
Temporary Equity [Line Items]                            
Common stock shares outstanding                     18,146,543      
Redeemable Class C Common Stock [Member] | SHHL [Member]                            
Temporary Equity [Line Items]                            
Temporary Equity, Shares outstanding   21,187,494         21,187,494       16,435,997 6,933,004    
Temporary Equity, Shares issued   21,187,494         21,187,494       16,435,997 6,933,004 6,933,004 6,933,004
Gross proceeds from redeemable common stock         $ 20 $ 45                
Temporary equity stock issued during the period shares         2,181,507 4,276,347   9,502,993            
Reclassification of temporary equity shares into permanent equity     1,710,546                      
Redeemable Class C Common Stock [Member] | SHHL [Member] | Investor Option Agreement [Member]                            
Temporary Equity [Line Items]                            
Gross proceeds from redeemable common stock       $ 100     $ 50              
Payment of discount on redeemable common stock       $ 6     $ 3              
Temporary equity stock issued during the period shares   4,751,497   9,502,993     4,751,497              
Proceeds from redeemable common stock net   $ 47   $ 94     $ 47              
Incurred share issuance costs       $ 1                    
Common Class C [Member] | SHHL [Member]                            
Temporary Equity [Line Items]                            
Common stock shares outstanding                     1,710,546      
Common Class A [Member]                            
Temporary Equity [Line Items]                            
Common stock shares outstanding                 53,741,731 53,722,597        
Temporary equity shares converted into permanent equity 6,592,023                          
Common Class A [Member] | SHHL [Member]                            
Temporary Equity [Line Items]                            
Gross proceeds from redeemable common stock           $ 5                
Temporary equity stock issued during the period shares           475,150                
Temporary equity shares converted into permanent equity 6,592,023                          
Common Class B [Member]                            
Temporary Equity [Line Items]                            
Common stock shares outstanding                 141,500,385 141,500,385        
Temporary equity shares converted into permanent equity 10,871,215                          
Common Class B [Member] | SHHL [Member]                            
Temporary Equity [Line Items]                            
Temporary equity shares converted into permanent equity 10,871,215