v3.26.1
Financial risk management - Summary Of Fair Value Of The Loan Guarantees Classified In Stage 3 (Detail) - PEN (S/)
S/ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Indirect Loans [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Expected credit loss S/ 12,355 S/ 14,248
Type Of Guarantee Or Credit Impovement [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Maximum exposure to credit risk 1,172,280 1,271,641
Assets obtained 1,146,545 1,353,166
Credit exposure 25,735 (81,525)
Expected credit loss 685,529 733,542
Type Of Guarantee Or Credit Impovement [Member] | Commercial loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Maximum exposure to credit risk 281,258 322,464
Assets obtained 415,957 560,010
Credit exposure (134,699) (237,546)
Expected credit loss 137,875 123,013
Type Of Guarantee Or Credit Impovement [Member] | Small and micro-business loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Maximum exposure to credit risk 55,003 85,443
Credit exposure 55,003 85,443
Expected credit loss 40,627 62,173
Type Of Guarantee Or Credit Impovement [Member] | Consumer Loans [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Maximum exposure to credit risk 472,061 514,691
Assets obtained   2,936
Credit exposure 472,061 511,755
Expected credit loss 452,932 494,700
Type Of Guarantee Or Credit Impovement [Member] | Mortgage loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Maximum exposure to credit risk 347,035 325,095
Assets obtained 723,164 782,659
Credit exposure (376,129) (457,564)
Expected credit loss 46,006 44,321
Type Of Guarantee Or Credit Impovement [Member] | Financial assets measured at amortized cost [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Maximum exposure to credit risk 1,155,357 1,247,693
Assets obtained 1,139,121 1,345,605
Credit exposure 16,236 (97,912)
Expected credit loss 677,440 724,207
Type Of Guarantee Or Credit Impovement [Member] | Indirect Loans [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Maximum exposure to credit risk 16,923 23,948
Assets obtained 7,424 7,561
Credit exposure 9,499 16,387
Expected credit loss 8,089 9,335
Type Of Guarantee Or Credit Impovement [Member] | Cash Guarantees [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 2,627 5,872
Type Of Guarantee Or Credit Impovement [Member] | Cash Guarantees [Member] | Commercial loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 2,627 2,936
Type Of Guarantee Or Credit Impovement [Member] | Cash Guarantees [Member] | Consumer Loans [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained   2,936
Type Of Guarantee Or Credit Impovement [Member] | Cash Guarantees [Member] | Financial assets measured at amortized cost [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 2,627 5,872
Type Of Guarantee Or Credit Impovement [Member] | Investments Guarantees [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 932 1,045
Type Of Guarantee Or Credit Impovement [Member] | Investments Guarantees [Member] | Commercial loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 264 1,045
Type Of Guarantee Or Credit Impovement [Member] | Investments Guarantees [Member] | Financial assets measured at amortized cost [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 264 1,045
Type Of Guarantee Or Credit Impovement [Member] | Investments Guarantees [Member] | Indirect Loans [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 668  
Type Of Guarantee Or Credit Impovement [Member] | Properties Guarantees [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 1,129,769 1,320,142
Type Of Guarantee Or Credit Impovement [Member] | Properties Guarantees [Member] | Commercial loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 399,849 529,922
Type Of Guarantee Or Credit Impovement [Member] | Properties Guarantees [Member] | Mortgage loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 723,164 782,659
Type Of Guarantee Or Credit Impovement [Member] | Properties Guarantees [Member] | Financial assets measured at amortized cost [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 1,123,013 1,312,581
Type Of Guarantee Or Credit Impovement [Member] | Properties Guarantees [Member] | Indirect Loans [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 6,756 7,561
Type Of Guarantee Or Credit Impovement [Member] | Others Guarantees [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 13,217 26,107
Type Of Guarantee Or Credit Impovement [Member] | Others Guarantees [Member] | Commercial loans [member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained 13,217 26,107
Type Of Guarantee Or Credit Impovement [Member] | Others Guarantees [Member] | Financial assets measured at amortized cost [Member]    
Disclosure Of Fair Value Of The Loan Guarantees [Line Items]    
Assets obtained S/ 13,217 S/ 26,107