v3.26.1
Financial investments - Summary of analysis of changes in fair value and corresponding expected credit loss (Detail) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets [line items]    
Beginning of year balances S/ 95,090 S/ 61,046
New originated or purchased assets 2,140 1,095
Assets matured or derecognized (excluding write-offs) (3,206) (3,915)
Transfers to Stage 1 0 0
Transfers to Stage 2 0 0
Transfers to Stage 3 0 0
Effect on the expected credit loss due to the change of the Stage during the year 264,223 8,958
Others 604 41,383
Write-offs (71,540) (13,043)
Foreign exchange effect (169) (434)
End of year balances 287,142 95,090
Stage 1 [member]    
Disclosure of financial assets [line items]    
Beginning of year balances 9,383 9,877
New originated or purchased assets 2,140 1,095
Assets matured or derecognized (excluding write-offs) (1,977) (851)
Transfers to Stage 1 3,371 0
Transfers to Stage 2 (7) (1,053)
Transfers to Stage 3 0 0
Effect on the expected credit loss due to the change of the Stage during the year (2,935) 0
Others (1,209) 457
Write-offs (26) 0
Foreign exchange effect (80) (142)
End of year balances 8,660 9,383
Stage 2 [member]    
Disclosure of financial assets [line items]    
Beginning of year balances 85,707 37,987
New originated or purchased assets 0 0
Assets matured or derecognized (excluding write-offs) (1,229) (2,808)
Transfers to Stage 1 (3,371) 0
Transfers to Stage 2 7 1,053
Transfers to Stage 3 (65,103) 0
Effect on the expected credit loss due to the change of the Stage during the year 58 8,958
Others 1,813 40,926
Write-offs (1,486) 0
Foreign exchange effect (88) (409)
End of year balances 16,308 85,707
Stage 3 [member]    
Disclosure of financial assets [line items]    
Beginning of year balances 0 13,182
New originated or purchased assets 0 0
Assets matured or derecognized (excluding write-offs) 0 (256)
Transfers to Stage 1 0 0
Transfers to Stage 2 0 0
Transfers to Stage 3 65,103 0
Effect on the expected credit loss due to the change of the Stage during the year 267,100 0
Others 0 0
Write-offs (70,028) (13,043)
Foreign exchange effect (1) 117
End of year balances 262,174 0
Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Beginning of year balances, Financial assets 20,377,805 20,912,184
New originated or purchased assets 5,527,693 4,916,977
Assets matured or derecognized (excluding write-offs) (4,223,853) (5,269,135)
Change in fair value 162,962 (247,289)
Transfers to Stage 1 0 0
Transfers to Stage 2 0 0
Transfers to Stage 3 0 0
Write offs 0 0
Foreign exchange effect (545,210) 65,068
End of year balances, Financial assets 21,299,397 20,377,805
Gross carrying amount [member] | Stage 1 [member]    
Disclosure of financial assets [line items]    
Beginning of year balances, Financial assets 19,331,755 20,160,308
New originated or purchased assets 5,527,693 4,916,977
Assets matured or derecognized (excluding write-offs) (4,013,469) (5,166,123)
Change in fair value 416,120 (218,924)
Transfers to Stage 1 78,049 0
Transfers to Stage 2 (2,945) (425,221)
Transfers to Stage 3 0 0
Write offs 0 0
Foreign exchange effect (543,764) 64,738
End of year balances, Financial assets 20,793,439 19,331,755
Gross carrying amount [member] | Stage 2 [member]    
Disclosure of financial assets [line items]    
Beginning of year balances, Financial assets 1,046,050 750,179
New originated or purchased assets 0 0
Assets matured or derecognized (excluding write-offs) (164,020) (101,294)
Change in fair value (51,589) (28,365)
Transfers to Stage 1 (78,049) 0
Transfers to Stage 2 2,945 425,221
Transfers to Stage 3 (325,490) 0
Write offs 0 0
Foreign exchange effect (1,446) 309
End of year balances, Financial assets 428,401 1,046,050
Gross carrying amount [member] | Stage 3 [member]    
Disclosure of financial assets [line items]    
Beginning of year balances, Financial assets 0 1,697
New originated or purchased assets 0 0
Assets matured or derecognized (excluding write-offs) (46,364) (1,718)
Change in fair value (201,569) 0
Transfers to Stage 1 0 0
Transfers to Stage 2 0 0
Transfers to Stage 3 325,490 0
Write offs 0 0
Foreign exchange effect 0 21
End of year balances, Financial assets S/ 77,557 S/ 0