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Financial Assets At Amortized Cost - Disclosure of Movement of ECL Allowance of Financial Assets At Amortized Cost (Detail) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of movement of ECL allowance of financial assets at amortized cost [Line Items]      
Beginning balance ¥ 3,784,613    
Ending balance 4,716,448 ¥ 3,784,613  
Allowance for credit losses [member]      
Disclosure of movement of ECL allowance of financial assets at amortized cost [Line Items]      
Beginning balance 1,338,976 1,171,865 ¥ 1,387,947
New financial assets originated or purchased 19,733 10,808 8,593
Transfers 232,385    
Net impact on expected credit loss by stage transfer 232,385    
Write-offs (50,712) (26,345) (234,275)
Disposal in the current period   (144,320)  
Financial assets de-recognized and other adjustments in the current period (including repayments of financial assets) (76,281) 33,287 (19,721)
Change in parameters of expected credit loss model 414,237 293,681 29,321
Ending balance 1,878,338 1,338,976 1,171,865
Stage 1 [member] | Allowance for credit losses [member]      
Disclosure of movement of ECL allowance of financial assets at amortized cost [Line Items]      
Beginning balance 11,904 5,160 13,997
New financial assets originated or purchased 19,733 10,808 8,593
Transfers (3,622)    
Transfers In Financial Assets At Amortised Cost From stage 1 to stage 2 (3,622)    
Financial assets de-recognized and other adjustments in the current period (including repayments of financial assets) (5,395) (4,531) (4,160)
Change in parameters of expected credit loss model 17,898 467 (13,270)
Ending balance 40,518 11,904 5,160
Stage 2 [member] | Allowance for credit losses [member]      
Disclosure of movement of ECL allowance of financial assets at amortized cost [Line Items]      
Beginning balance   0 0
Transfers In Financial Assets At Amortised Cost From stage 1 to stage 2 3,622    
Transfers In Financial Assets At Amortised Cost From stage 1 to stage 3 (63,386)    
Net impact on expected credit loss by stage transfer 59,764    
Ending balance     0
Stage 3 [member] | Allowance for credit losses [member]      
Disclosure of movement of ECL allowance of financial assets at amortized cost [Line Items]      
Beginning balance 1,280,502 1,140,348 1,321,133
Transfers 236,007    
Transfers In Financial Assets At Amortised Cost From stage 1 to stage 3 63,386    
Net impact on expected credit loss by stage transfer 172,621    
Write-offs (38,858) (17,651) (221,754)
Disposal in the current period   (144,320)  
Financial assets de-recognized and other adjustments in the current period (including repayments of financial assets) (74,124) (10,366) (15,444)
Change in parameters of expected credit loss model 403,165 312,491 56,413
Ending balance 1,806,692 1,280,502 1,140,348
POCI [Member] | Allowance for credit losses [member]      
Disclosure of movement of ECL allowance of financial assets at amortized cost [Line Items]      
Beginning balance 46,570 26,357 52,817
Write-offs (11,854) (8,694) (12,521)
Financial assets de-recognized and other adjustments in the current period (including repayments of financial assets) 3,238 48,184 (117)
Change in parameters of expected credit loss model (6,826) (19,277) (13,822)
Ending balance ¥ 31,128 ¥ 46,570 ¥ 26,357