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Borrowings - Additional Information (Detail)
¥ in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Disclosure of detailed information about borrowings [line items]      
Borrowings ¥ 25,927,417   ¥ 10,315,445
Unsecured Three Year Syndicated Loan [Member]      
Disclosure of detailed information about borrowings [line items]      
Borrowings 8,225,000 $ 1,290  
Notional amount ¥ 1,500,000    
Borrowings, adjustment to interest rate basis 1.25% 1.25%  
Borrowings interest rate basis LIBOR rate plus 1.25%    
Secured Deposits [Member]      
Disclosure of detailed information about borrowings [line items]      
Borrowings ¥ 2,992,000 $ 469  
Secured Deposits [Member] | Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Borrowings, adjustment to interest rate basis 1.35% 1.35%  
Secured Deposits [Member] | Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Borrowings, adjustment to interest rate basis 1.90% 1.90%