v3.26.1
Assets and Liabilities for insurance and reinsurance contracts - Summary of movement of issued insurance contract liabilities (Detail) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 S/ 12,522,352    
Insurance revenue 9,342 S/ 4,162 S/ 10,163
Insurance service expenses 11,458 14,414 10,066
Incurred claims and other expenses (1,185,850) (1,027,117) (1,022,291)
Amortization of insurance acquisition cash flows (171,463) (136,433) (127,009)
Losses on onerous contracts and reversals of those losses 79,044 57,777 115,967
Insurance service result (47,797) (169,789) (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  
Excluding loss component [member]      
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 11,593,754 11,301,149  
Insurance revenue (1,124,366) (768,758)  
Contracts under fair value, BBA and VFA approach (627,800) (545,835)  
Contracts under PAA approach (496,566) (222,923)  
Insurance service expenses 171,463 136,433  
Incurred claims and other expenses 0 0  
Amortization of insurance acquisition cash flows 171,463 136,433  
Losses on onerous contracts and reversals of those losses 0 0  
Changes to liabilities for incurred claims 0 0  
Insurance service result (952,903) (632,325)  
Insurance financial expenses 1,373,048 622,313  
Insurance financial result 637,678 562,759  
Interest rate effect 735,370 59,554  
Effect of movements in exchange rates (474,146) 67,432  
Total changes in the statement of income and other comprehensive income (54,001) 57,420  
Net cash flow and investment component 487,946 235,185  
Premiums received 1,323,126 1,029,082  
Claims and other expenses paid 0 0  
Insurance acquisition cash flows (256,359) (216,568)  
Investment component (578,821) (577,329)  
Balance as of December 31 12,027,699 11,593,754 11,301,149
Loss component [member]      
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 742,168 699,071  
Insurance revenue 0 0  
Contracts under fair value, BBA and VFA approach 0 0  
Contracts under PAA approach 0 0  
Insurance service expenses (79,044) (57,777)  
Incurred claims and other expenses 0 0  
Amortization of insurance acquisition cash flows 0 0  
Losses on onerous contracts and reversals of those losses (79,044) (57,777)  
Changes to liabilities for incurred claims 0 0  
Insurance service result (79,044) (57,777)  
Insurance financial expenses 76,119 97,206  
Insurance financial result 76,119 97,206  
Interest rate effect 0 0  
Effect of movements in exchange rates (22,241) 3,668  
Total changes in the statement of income and other comprehensive income (25,166) 43,097  
Net cash flow and investment component 0 0  
Premiums received 0 0  
Claims and other expenses paid 0 0  
Insurance acquisition cash flows 0 0  
Investment component 0 0  
Balance as of December 31 717,002 742,168 699,071
Fulfillment Cash Flows [Member]      
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 148,101 155,649  
Insurance revenue 0 0  
Contracts under fair value, BBA and VFA approach 0 0  
Contracts under PAA approach 0 0  
Insurance service expenses 444,236 454,446  
Incurred claims and other expenses 971,901 979,959  
Amortization of insurance acquisition cash flows 0 0  
Losses on onerous contracts and reversals of those losses 0 0  
Changes to liabilities for incurred claims (527,665) (525,513)  
Insurance service result 444,236 454,446  
Insurance financial expenses 0 0  
Insurance financial result 0 0  
Interest rate effect 0 0  
Effect of movements in exchange rates (2,344) 292  
Total changes in the statement of income and other comprehensive income 441,892 454,738  
Net cash flow and investment component (459,979) (462,286)  
Premiums received 0 0  
Claims and other expenses paid (1,038,800) (1,039,615)  
Insurance acquisition cash flows 0 0  
Investment component 578,821 577,329  
Balance as of December 31 130,014 148,101 155,649
Risk adjustment [member]      
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 4,271 5,257  
Insurance revenue 0 0  
Contracts under fair value, BBA and VFA approach 0 0  
Contracts under PAA approach 0 0  
Insurance service expenses (2,127) (990)  
Incurred claims and other expenses 107 106  
Amortization of insurance acquisition cash flows 0 0  
Losses on onerous contracts and reversals of those losses 0 0  
Changes to liabilities for incurred claims (2,234) (1,096)  
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)  
Net cash flow and investment component 0 0  
Premiums received 0 0  
Claims and other expenses paid 0 0  
Insurance acquisition cash flows 0 0  
Investment component 0 0  
Balance as of December 31 1,961 4,271 5,257
Liabilities for incurred claims in contracts measured by the Premium Allocation Approach (PAA)      
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 12,522,352 12,205,641  
Insurance revenue (1,124,366) (768,758)  
Contracts under fair value, BBA and VFA approach (627,800) (545,835)  
Contracts under PAA approach (496,566) (222,923)  
Insurance service expenses 859,179 632,860  
Incurred claims and other expenses 1,185,850 1,027,117  
Amortization of insurance acquisition cash flows 171,463 136,433  
Losses on onerous contracts and reversals of those losses (79,044) (57,777)  
Changes to liabilities for incurred claims (419,090) (472,913)  
Insurance service result (265,187) (135,898)  
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 (499,724) 71,543  
Total changes in the statement of income and other comprehensive income 684,256 655,164  
Net cash flow and investment component (147,836) (338,453)  
Premiums received 1,323,126 1,029,082  
Claims and other expenses paid (1,214,603) (1,150,967)  
Insurance acquisition cash flows (256,359) (216,568)  
Investment component 0 0  
Balance as of December 31 13,058,772 12,522,352 12,205,641
Liabilities for incurred claims in contracts measured by the Premium Allocation Approach (PAA) | Fulfillment Cash Flows [Member]      
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 33,276 43,237  
Insurance revenue 0 0  
Contracts under fair value, BBA and VFA approach 0 0  
Contracts under PAA approach 0 0  
Insurance service expenses 319,554 101,245  
Incurred claims and other expenses 208,745 47,549  
Amortization of insurance acquisition cash flows 0 0  
Losses on onerous contracts and reversals of those losses 0 0  
Changes to liabilities for incurred claims 110,809 53,696  
Insurance service result 319,554 101,245  
Insurance financial expenses 0 0  
Insurance financial result 0 0  
Interest rate effect 0 0  
Effect of movements in exchange rates (796) 146  
Total changes in the statement of income and other comprehensive income 318,758 101,391  
Net cash flow and investment component (175,803) (111,352)  
Premiums received 0 0  
Claims and other expenses paid (175,803) (111,352)  
Insurance acquisition cash flows 0 0  
Investment component 0 0  
Balance as of December 31 176,231 33,276 43,237
Liabilities for incurred claims in contracts measured by the Premium Allocation Approach (PAA) | Risk adjustment [member]      
Disclosure Of Movement Of Insurance Contract Liability [Line Items]      
Balance as of January 1 782 1,278  
Insurance revenue 0 0  
Contracts under fair value, BBA and VFA approach 0 0  
Contracts under PAA approach 0 0  
Insurance service expenses 5,097 (497)  
Incurred claims and other expenses 5,097 (497)  
Amortization of insurance acquisition cash flows 0 0  
Losses on onerous contracts and reversals of those losses 0 0  
Changes to liabilities for incurred claims 0 0  
Insurance service result 5,097 (497)  
Insurance financial expenses 0 0  
Insurance financial result 0 0  
Interest rate effect 0 0  
Effect of movements in exchange rates (14) 1  
Total changes in the statement of income and other comprehensive income 5,083 (496)  
Net cash flow and investment component 0 0  
Premiums received 0 0  
Claims and other expenses paid 0 0  
Insurance acquisition cash flows 0 0  
Investment component 0 0  
Balance as of December 31 S/ 5,865 S/ 782 S/ 1,278