v3.26.1
Fair value - Summary of fair value measurement of assets and liabilities (Detail) - PEN (S/)
S/ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets S/ 23,942,415 S/ 22,755,841  
Total financial assets 24,305,669 23,102,928  
Financial liabilities 207,084 163,441  
Derivatives payable [Member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 207,084 102,288  
Liabilities at fair value through profit or loss [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities   61,153  
Financial investments, Derivatives receivable [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 120,878 143,201  
Accrued Interest [Member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 363,254 347,087  
Investments at fair value through profit or loss [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,965,991 1,776,567  
Debt instruments measured at fair value through other comprehensive income [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 21,299,397 20,377,805  
Equity instruments measured at fair value through other comprehensive income [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 556,149 458,268  
Level 1 [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 14,498,713 13,433,551  
Financial liabilities   61,153  
Level 1 [member] | Liabilities at fair value through profit or loss [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities   61,153  
Level 1 [member] | Investments at fair value through profit or loss [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 247,299 304,659  
Level 1 [member] | Debt instruments measured at fair value through other comprehensive income [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 13,732,571 12,722,114  
Level 1 [member] | Equity instruments measured at fair value through other comprehensive income [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 518,843 406,778  
Level 2 [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 8,357,822 8,272,509  
Financial liabilities 207,084 102,288  
Level 2 [member] | Derivatives payable [Member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial liabilities 207,084 102,288  
Level 2 [member] | Financial investments, Derivatives receivable [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 120,878 143,201  
Level 2 [member] | Investments at fair value through profit or loss [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 666,443 459,767  
Level 2 [member] | Debt instruments measured at fair value through other comprehensive income [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 7,566,826 7,655,691  
Level 2 [member] | Equity instruments measured at fair value through other comprehensive income [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 3,675 13,850  
Level 3 [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,085,880 1,049,781 S/ 919,866
Level 3 [member] | Investments at fair value through profit or loss [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets 1,052,249 1,012,141  
Level 3 [member] | Equity instruments measured at fair value through other comprehensive income [member]      
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]      
Financial assets S/ 33,631 S/ 37,640