v3.26.1
Financial risk management - Disclosure Of Estimated Changes In Interest Rates (Detail) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Increase decrease in 25 bps in interest rate [member] | US Dollar [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income S/ 1,569 S/ 83
Sensitivity of other net comprehensive income 139,317 129,434
Increase decrease in 50 bps in interest rate [member] | US Dollar [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income 3,139 163
Sensitivity of other net comprehensive income 278,784 259,018
Increase decrease in 50 bps in interest rate [member] | Sol [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income 44,542 48,323
Sensitivity of other net comprehensive income 656,467 624,757
Increase decrease in 75 bps in interest rate [member] | US Dollar [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income 4,709 245
Sensitivity of other net comprehensive income 418,550 388,891
Increase decrease in 75 bps in interest rate [member] | Sol [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income 66,813 72,484
Sensitivity of other net comprehensive income 985,415 937,824
Increase decrease in 100 bps in interest rate [member] | US Dollar [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income 6,279 325
Sensitivity of other net comprehensive income 558,764 519,209
Increase decrease in 100 bps in interest rate [member] | Sol [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income 89,084 96,645
Sensitivity of other net comprehensive income 1,315,229 1,251,722
Increase decrease in 150 bps in interest rate [member] | Sol [member]    
Disclosure Of Increase Decrease In Interest Rate And Impact On Results Line Items [Line Items]    
Sensitivity of net income 133,627 144,968
Sensitivity of other net comprehensive income S/ 1,978,637 S/ 1,883,154