v3.26.1
Fair value - Summary of fair value measurement of assets and liabilities levels of hierarchy (Detail) - PEN (S/)
S/ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost S/ 70,078,996 S/ 67,579,297
Financial liabilities at amortized cost 86,125,742 83,963,514
Deposits And Obligations [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 56,027,630 53,768,028
Inter Bank Funds [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 55,019  
Due To Banks And Correspondents [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 7,166,014 7,562,057
Bonds Notes And Other Obligations [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 5,590,408 6,075,433
Due From Customers On Acceptances [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 51,332 9,163
Insurance And Reinsurance Contract Liabilities [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 13,063,254 12,524,320
Other accounts payable and other liabilities [member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 4,172,085 4,024,513
Cash And Due From Banks [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 14,035,949 12,615,226
Inter Bank Funds [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 40,006 220,060
Financial Investments [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 3,989,015 3,898,198
Loans Net [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 50,770,150 49,229,448
Due From Customers On Acceptances [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 51,332 9,163
Accounts receivable and other assets, net    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 1,135,362 1,588,600
Reinsurance Contract Assets [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 57,182 18,602
Level 1 [member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 18,062,508 16,391,161
Financial liabilities at amortized cost 4,976,125 5,163,150
Level 1 [member] | Bonds Notes And Other Obligations [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 4,976,125 5,163,150
Level 1 [member] | Cash And Due From Banks [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 14,035,949 12,615,226
Level 1 [member] | Financial Investments [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 4,026,559 3,775,935
Level 2 [member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 51,614,250 50,269,047
Financial liabilities at amortized cost 81,277,972 78,873,368
Level 2 [member] | Deposits And Obligations [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 56,042,175 53,770,487
Level 2 [member] | Inter Bank Funds [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 55,019  
Level 2 [member] | Due To Banks And Correspondents [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 7,183,314 7,706,223
Level 2 [member] | Bonds Notes And Other Obligations [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 710,793 838,662
Level 2 [member] | Due From Customers On Acceptances [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 51,332 9,163
Level 2 [member] | Insurance And Reinsurance Contract Liabilities [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 13,063,254 12,524,320
Level 2 [member] | Other accounts payable and other liabilities [member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 4,172,085 4,024,513
Level 2 [member] | Inter Bank Funds [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 40,006 220,060
Level 2 [member] | Financial Investments [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 140,840 98,658
Level 2 [member] | Loans Net [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 50,189,528 48,333,964
Level 2 [member] | Due From Customers On Acceptances [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 51,332 9,163
Level 2 [member] | Accounts receivable and other assets, net    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 1,135,362 1,588,600
Level 2 [member] | Reinsurance Contract Assets [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 57,182 18,602
Fair value [member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 69,676,758 66,660,208
Financial liabilities at amortized cost 86,254,097 84,036,518
Fair value [member] | Deposits And Obligations [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 56,042,175 53,770,487
Fair value [member] | Inter Bank Funds [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 55,019  
Fair value [member] | Due To Banks And Correspondents [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 7,183,314 7,706,223
Fair value [member] | Bonds Notes And Other Obligations [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 5,686,918 6,001,812
Fair value [member] | Due From Customers On Acceptances [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 51,332 9,163
Fair value [member] | Insurance And Reinsurance Contract Liabilities [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 13,063,254 12,524,320
Fair value [member] | Other accounts payable and other liabilities [member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial liabilities at amortized cost 4,172,085 4,024,513
Fair value [member] | Cash And Due From Banks [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 14,035,949 12,615,226
Fair value [member] | Inter Bank Funds [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 40,006 220,060
Fair value [member] | Financial Investments [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 4,167,399 3,874,593
Fair value [member] | Loans Net [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 50,189,528 48,333,964
Fair value [member] | Due From Customers On Acceptances [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 51,332 9,163
Fair value [member] | Accounts receivable and other assets, net    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost 1,135,362 1,588,600
Fair value [member] | Reinsurance Contract Assets [Member]    
Disclosure Of Fair Value Measurement Of Assets And Liabilities Levels Of Hierarchy [Line Items]    
Financial assets at amortized cost S/ 57,182 S/ 18,602