v3.26.1
Financial risk management - Summary of sensitivity of life insurance contracts and reinsurance contracts (Detail) - PEN (S/)
S/ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Insurance risk [member] | Mortality/morbidity rate [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ (11,635) S/ (11,560)
Impact on income/CSM before taxes, net of reinsurance, Increase (5,508) (9,942)
Impact on net equity, gross of reinsurance, Increase (13,831) (12,038)
Impact on net equity of reinsurance, Increase S/ (7,705) (10,420)
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ 11,670 11,150
Impact on income/CSM before taxes, net of reinsurance, Decrease 8,410 10,048
Impact on net equity, gross of reinsurance, Decrease 13,713 11,470
Impact on net equity of reinsurance, Decrease S/ 10,453 10,368
Insurance risk [member] | Longevity [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ (209,615) (215,592)
Impact on income/CSM before taxes, net of reinsurance, Increase (209,615) (215,592)
Impact on net equity, gross of reinsurance, Increase (202,358) (179,819)
Impact on net equity of reinsurance, Increase S/ (202,358) (179,819)
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ 133,505 157,253
Impact on income/CSM before taxes, net of reinsurance, Decrease 133,505 157,253
Impact on net equity, gross of reinsurance, Decrease 127,307 125,713
Impact on net equity of reinsurance, Decrease S/ 127,307 125,713
Insurance risk [member] | Expenses [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ (36,563) (38,400)
Impact on income/CSM before taxes, net of reinsurance, Increase (36,568) (38,274)
Impact on net equity, gross of reinsurance, Increase (36,824) (33,987)
Impact on net equity of reinsurance, Increase S/ (36,829) (33,862)
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ 36,361 38,394
Impact on income/CSM before taxes, net of reinsurance, Decrease 36,317 38,330
Impact on net equity, gross of reinsurance, Decrease 36,611 33,980
Impact on net equity of reinsurance, Decrease S/ 36,566 33,916
Insurance risk [member] | Expiration and abandonment rate [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ 10,238 11,536
Impact on income/CSM before taxes, net of reinsurance, Increase 8,779 10,589
Impact on net equity, gross of reinsurance, Increase 9,527 7,267
Impact on net equity of reinsurance, Increase S/ 8,067 6,320
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ (10,900) (12,300)
Impact on income/CSM before taxes, net of reinsurance, Decrease (9,291) (11,206)
Impact on net equity, gross of reinsurance, Decrease (9,936) (7,665)
Impact on net equity of reinsurance, Decrease S/ (8,326) (6,571)
Liquidity risk [member] | Mortality/morbidity rate [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ (43,274) (32,566)
Impact on income/CSM before taxes, net of reinsurance, Increase S/ (31,820) (21,822)
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ 43,664 33,422
Impact on income/CSM before taxes, net of reinsurance, Decrease S/ 29,152 22,119
Liquidity risk [member] | Longevity [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ (38,516) (40,650)
Impact on income/CSM before taxes, net of reinsurance, Increase S/ (38,516) (40,650)
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ 92,190 75,852
Impact on income/CSM before taxes, net of reinsurance, Decrease S/ 92,190 75,852
Liquidity risk [member] | Expenses [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ (34,322) (26,561)
Impact on income/CSM before taxes, net of reinsurance, Increase S/ (34,317) (26,686)
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ 34,501 26,543
Impact on income/CSM before taxes, net of reinsurance, Decrease S/ 34,545 26,606
Liquidity risk [member] | Expiration and abandonment rate [member]    
Disclosure of sensitivity analysis to changes in risk variables that arise from contracts within scope of IFRS 17 [line items]    
Change in assumptions, Increase 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Increase S/ (6,127) (3,941)
Impact on income/CSM before taxes, net of reinsurance, Increase S/ (6,684) (4,485)
Change in assumptions, Decrease 10.00%  
Impact on income/CSM before taxes, gross of reinsurance, Decrease S/ 7,535 4,852
Impact on income/CSM before taxes, net of reinsurance, Decrease S/ 8,262 S/ 5,480