v3.26.1
Financing Guarantee Liabilities - Summary Of Movement Of Gross Carrying Amount Of Financing Guarantee Contracts (Detail) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Gross carrying amount [member]      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Beginning balance ¥ 183,910,499    
Ending balance 188,919,371 ¥ 183,910,499  
Financial guarantee contracts [member] | Gross carrying amount [member]      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Beginning balance 68,017,023 54,903,487 ¥ 68,502,938
New guarantee contracts originated 58,210,478 65,141,133 38,342,179
Guarantee liabilities derecognized and other adjustments in the current period (including repayments of loans and guarantee payments) (58,757,293) (52,027,597) (51,941,630)
Ending balance 67,470,208 68,017,023 54,903,487
Financial guarantee contracts [member] | Gross carrying amount [member] | Stage 1 [member]      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Beginning balance 67,368,608 53,889,614 67,011,692
New guarantee contracts originated 58,210,478 65,141,133 38,342,179
Guarantee liabilities derecognized and other adjustments in the current period (including repayments of loans and guarantee payments) (52,344,977) (46,944,282) (44,798,214)
Ending balance 65,376,106 67,368,608 53,889,614
Financial guarantee contracts [member] | Gross carrying amount [member] | Stage 1 [member] | — From stage 1 to stage 2      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage (8,397,741) (4,928,503) (7,000,050)
Financial guarantee contracts [member] | Gross carrying amount [member] | Stage 1 [member] | — From stage 2 to stage 1      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage 539,738 210,646 334,007
Financial guarantee contracts [member] | Gross carrying amount [member] | Stage 2 [member]      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Beginning balance 648,415 1,013,873 1,491,246
Guarantee liabilities derecognized and other adjustments in the current period (including repayments of loans and guarantee payments) (6,412,316) (5,083,315) (7,143,416)
Ending balance 2,094,102 648,415 1,013,873
Financial guarantee contracts [member] | Gross carrying amount [member] | Stage 2 [member] | — From stage 1 to stage 2      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage 8,397,741 4,928,503 7,000,050
Financial guarantee contracts [member] | Gross carrying amount [member] | Stage 2 [member] | — From stage 2 to stage 1      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage (539,738) (210,646) (334,007)
Financial guarantee contracts [member] | Accumulated Impairment [Member]      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Beginning balance 4,217,979 4,185,532 5,763,369
New guarantee contracts originated 1,502,173 1,384,484 676,224
Guarantee liabilities derecognized and other adjustments in the current period (including repayments of loans and guarantee payments) (8,756,795) (7,108,899) (9,564,536)
Remeasurements 8,683,986 5,756,862 7,310,475
Ending balance 5,647,343 4,217,979 4,185,532
Financial guarantee contracts [member] | Accumulated Impairment [Member] | Stage 1 [member]      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Beginning balance 3,623,763 3,230,750 4,375,720
New guarantee contracts originated 1,502,173 1,384,484 676,224
Guarantee liabilities derecognized and other adjustments in the current period (including repayments of loans and guarantee payments) (2,991,987) (2,364,552) (2,830,662)
Remeasurements 6,958,587 5,264,775 6,501,258
Ending balance 3,796,824 3,623,763 3,230,750
Financial guarantee contracts [member] | Accumulated Impairment [Member] | Stage 1 [member] | — From stage 1 to stage 2      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage (5,778,027) (4,087,051) (5,805,478)
Financial guarantee contracts [member] | Accumulated Impairment [Member] | Stage 1 [member] | — From stage 2 to stage 1      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage 482,315 195,357 313,688
Financial guarantee contracts [member] | Accumulated Impairment [Member] | Stage 2 [member]      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Beginning balance 594,216 954,782 1,387,649
Guarantee liabilities derecognized and other adjustments in the current period (including repayments of loans and guarantee payments) (5,764,808) (4,744,347) (6,733,874)
Remeasurements 1,725,399 492,087 809,217
Ending balance 1,850,519 594,216 954,782
Financial guarantee contracts [member] | Accumulated Impairment [Member] | Stage 2 [member] | — From stage 1 to stage 2      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage 5,778,027 4,087,051 5,805,478
Financial guarantee contracts [member] | Accumulated Impairment [Member] | Stage 2 [member] | — From stage 2 to stage 1      
Movement Of Gross Carrying Amount Of Financing Guarantee Commitments [Line Items]      
Transfers financial assets Stage ¥ (482,315) ¥ (195,357) ¥ (313,688)