v3.26.1
Assets and Liabilities for insurance and reinsurance contracts - Summary of CSM movement for insurance contract portfolios (Detail) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of information about expected recognition of contractual service margin in profit or loss [line items]      
Contractual Service Margin as of January 1 S/ 870,851    
Insurance service result (47,797) S/ (169,789) S/ (178,392)
Total changes in the statement of income 265,187 135,898 170,482
Balance as of December 31 1,079,940 870,851  
Contractual service margin [member]      
Disclosure of information about expected recognition of contractual service margin in profit or loss [line items]      
Contractual Service Margin as of January 1 870,851 742,870  
Contractual service margin recognized for services provided (132,263) (94,596)  
Contracts initially recognized in the period 341,071 269,737  
Changes in estimates that adjust the contractual service margin (53,512) (95,243)  
Insurance service result 155,296 79,898  
Insurance financial expenses 66,019 46,348  
Effect of movements in exchange difference (12,226) 1,735  
Total changes in the statement of income 209,089 127,981  
Balance as of December 31 S/ 1,079,940 S/ 870,851 S/ 742,870