v3.26.1
Assets and Liabilities for insurance and reinsurance contracts - Summary of issued insurance contracts' net asset or liability (Detail) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components Of Life Insurance [Line Items]      
Balance as of January 1 S/ 12,522,352    
Insurance service result (47,797) S/ (169,789) S/ (178,392)
Total changes in the statement of income and other comprehensive income 265,187 135,898 170,482
Balance as of December 31 13,018,668 12,522,352  
Risk adjustment [member]      
Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components Of Life Insurance [Line Items]      
Balance as of January 1 4,271 5,257  
Insurance service result (2,127) (990)  
Insurance financial expenses 0 0  
Insurance financial result 0 0  
Interest rate effect 0 0  
Effect of movements in exchange rates (183) 4  
Total changes in the statement of income and other comprehensive income (2,310) (986)  
Cash flows 0 0  
Premiums received 0 0  
Claims and other expenses paid 0 0  
Insurance acquisition cash flows 0 0  
Balance as of December 31 1,961 4,271 5,257
Contractual service margin [member]      
Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components Of Life Insurance [Line Items]      
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 rates (12,226) 1,735  
Total changes in the statement of income and other comprehensive income 209,089 127,981  
Life insurance [member]      
Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components Of Life Insurance [Line Items]      
Balance as of January 1 12,453,258 12,117,909  
Contractual service margin recognized for services provided (132,263) (94,596)  
Risk adjustment recognized for the risk expired (20,797) (12,257)  
Experience adjustments (62,243) (30,427)  
Contracts initially recognized in the period 33,955 22,259  
Changes in estimates that adjust the contractual service margin 0 0  
Changes in estimates that do not adjust the contractual service margin (45,257) (12,695)  
Adjustments to liabilities for incurred claims (17,870) (6,806)  
Insurance service result (244,475) (134,522)  
Insurance financial expenses 1,449,167 719,519  
Insurance financial result 713,797 659,965  
Interest rate effect 735,370 59,554  
Effect of movements in exchange rates (498,464) 71,263  
Total changes in the statement of income and other comprehensive income 706,228 656,260  
Cash flows (320,715) (320,911)  
Premiums received 825,245 812,221  
Claims and other expenses paid (1,038,800) (1,039,615)  
Insurance acquisition cash flows (107,160) (93,517)  
Balance as of December 31 12,838,771 12,453,258 12,117,909
Life insurance [member] | Estimates of the present value of future cash flows [member]      
Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components Of Life Insurance [Line Items]      
Balance as of January 1 11,305,123 11,072,275  
Contractual service margin recognized for services provided 0 0  
Risk adjustment recognized for the risk expired 0 0  
Experience adjustments (62,243) (30,427)  
Contracts initially recognized in the period (325,501) (260,895)  
Changes in estimates that adjust the contractual service margin 55,515 101,713  
Changes in estimates that do not adjust the contractual service margin (36,850) 23,807  
Adjustments to liabilities for incurred claims (15,548) (6,806)  
Insurance service result (384,627) (172,608)  
Insurance financial expenses 1,356,275 658,081  
Insurance financial result 620,905 598,527  
Interest rate effect 735,370 59,554  
Effect of movements in exchange rates (477,123) 68,286  
Total changes in the statement of income and other comprehensive income 494,525 553,759  
Cash flows (320,715) (320,911)  
Premiums received 825,245 812,221  
Claims and other expenses paid (1,038,800) (1,039,615)  
Insurance acquisition cash flows (107,160) (93,517)  
Balance as of December 31 11,478,933 11,305,123 11,072,275
Life insurance [member] | Risk adjustment [member]      
Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components Of Life Insurance [Line Items]      
Balance as of January 1 277,284 302,764  
Contractual service margin recognized for services provided 0 0  
Risk adjustment recognized for the risk expired (20,797) (12,257)  
Experience adjustments 0 0  
Contracts initially recognized in the period 18,385 13,417  
Changes in estimates that adjust the contractual service margin (2,003) (6,470)  
Changes in estimates that do not adjust the contractual service margin (8,407) (36,502)  
Adjustments to liabilities for incurred claims (2,322) 0  
Insurance service result (15,144) (41,812)  
Insurance financial expenses 26,873 15,090  
Insurance financial result 26,873 15,090  
Interest rate effect 0 0  
Effect of movements in exchange rates (9,115) 1,242  
Total changes in the statement of income and other comprehensive income 2,614 (25,480)  
Cash flows 0 0  
Premiums received 0 0  
Claims and other expenses paid 0 0  
Insurance acquisition cash flows 0 0  
Balance as of December 31 279,898 277,284 302,764
Life insurance [member] | Contractual service margin [member]      
Disclosure Of Reconciliation Of Changes In Insurance Contracts By Components Of Life Insurance [Line Items]      
Balance as of January 1 870,851 742,870  
Contractual service margin recognized for services provided (132,263) (94,596)  
Risk adjustment recognized for the risk expired 0 0  
Experience adjustments 0 0  
Contracts initially recognized in the period 341,071 269,737  
Changes in estimates that adjust the contractual service margin (53,512) (95,243)  
Changes in estimates that do not adjust the contractual service margin 0 0  
Adjustments to liabilities for incurred claims 0 0  
Insurance service result 155,296 79,898  
Insurance financial expenses 66,019 46,348  
Insurance financial result 66,019 46,348  
Interest rate effect 0 0  
Effect of movements in exchange rates (12,226) 1,735  
Total changes in the statement of income and other comprehensive income 209,089 127,981  
Cash flows 0 0  
Premiums received 0 0  
Claims and other expenses paid 0 0  
Insurance acquisition cash flows 0 0  
Balance as of December 31 S/ 1,079,940 S/ 870,851 S/ 742,870