Registration statement for securities of certain foreign private issuers

Capital and Reserves - Summary of Authorized Called Up and Fully Paid Up Capital (Parenthetical) (Detail)

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Capital and Reserves - Summary of Authorized Called Up and Fully Paid Up Capital (Parenthetical) (Detail) - $ / shares
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Common Stock Class B [Member]      
Disclosure of classes of share capital [line items]      
Number of shares issued and fully paid 664,605,000    
Series C Preferred Shares [Member]      
Disclosure of classes of share capital [line items]      
Number of shares issued and fully paid 293,188 252,176,369  
Ordinary shares [member] | Common Stock Class A [Member]      
Disclosure of classes of share capital [line items]      
Number of shares authorized 10,000,000,000 10,000,000,000  
Par or stated value per share $ 0.00001277 $ 0.00001277  
Number of shares issued and fully paid 135,136,000 135,136,000 135,136,000
Ordinary shares [member] | Common Stock Class B [Member]      
Disclosure of classes of share capital [line items]      
Number of shares authorized 11,000,000,000 11,000,000,000  
Par or stated value per share $ 0.00001277 $ 0.00001277  
Number of shares issued and fully paid 681,811,000 664,605,000 664,605,000
Preference shares [member] | Series C Preferred Shares [Member]      
Disclosure of classes of share capital [line items]      
Number of shares authorized 10,000,000,000 10,000,000,000  
Par or stated value per share $ 0.00001277 $ 0.00001277  
Number of shares issued and fully paid 293,077,000 252,065,000 227,380,000
Preference shares [member] | Redeemable Preference G One Shares [Member]      
Disclosure of classes of share capital [line items]      
Number of shares authorized 50,000,000    
Par or stated value per share $ 0.00001277    
Number of shares issued and fully paid 10,150,000 0