v3.26.1
Subsidiaries - Summary of consolidated financial statements of subsidiaries (Detail) - PEN (S/)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Consolidated statement of financial position -        
Cash and due from banks S/ 10,839,322,000 S/ 10,187,005,000    
Financial Investments 28,173,806,000 26,857,925,000    
Loans, net 50,770,150,000 49,229,448,000    
Investment property 1,540,615,000 1,381,788,000 S/ 1,298,892,000 S/ 1,287,717,000
Total assets 99,097,427,000 95,503,781,000    
Deposits and obligations 56,027,630,000 53,768,028,000    
Due to banks and correspondents 7,166,014,000 7,562,057,000    
Bonds, notes and other obligations 5,590,408,000 6,075,433,000    
Insurance and reinsurance contract liabilities 16,776,000 6,354,000    
Total liabilities 86,675,583,000 84,525,186,000    
Equity attributable to IFS's shareholders 12,421,844,000 10,978,595,000 10,008,101,000 S/ 9,426,227,000
Consolidated statement of income -        
Net interest and similar income 4,629,406,000 4,549,121,000 4,528,045,000  
(Loss) recovery due to impairment on loans, net of recoveries (1,136,707,000) (1,720,179,000) (1,981,818,000)  
(Loss) recovery due to impairment of financial investments (263,761,000) (47,521,000) (7,500,000)  
Fee income from financial services, net 1,219,631,000 1,142,943,000 1,178,462,000  
Result from insurance activities (457,049,000) (538,674,000) (512,994,000)  
Net profit for the year attributable to IFS's shareholders 1,943,195,000 1,307,461,000 S/ 1,079,276,000  
Interbank and Subsidiaries [Member]        
Consolidated statement of financial position -        
Cash and due from banks 12,917,558,000 11,666,498,000    
Financial Investments 11,960,351,000 11,187,487,000    
Loans, net 49,279,580,000 47,607,947,000    
Investment property    
Total assets 76,763,239,000 73,626,419,000    
Deposits and obligations 53,667,207,000 51,144,356,000    
Due to banks and correspondents 6,728,071,000 6,963,726,000    
Bonds, notes and other obligations 4,289,662,000 4,669,116,000    
Insurance and reinsurance contract liabilities    
Total liabilities 66,505,666,000 64,753,475,000    
Equity attributable to IFS's shareholders 10,257,573,000 8,872,944,000    
Consolidated statement of income -        
Net interest and similar income 3,835,008,000 3,752,432,000    
(Loss) recovery due to impairment on loans, net of recoveries (1,136,728,000) (1,719,913,000)    
(Loss) recovery due to impairment of financial investments (30,000) (982,000)    
Net gain of investment property    
Fee income from financial services, net 884,628,000 791,815,000    
Result from insurance activities    
Net profit for the year attributable to IFS's shareholders 1,474,997,000 1,007,353,000    
Interseguro [Member]        
Consolidated statement of financial position -        
Cash and due from banks 482,545,000 203,945,000    
Financial Investments 14,552,181,000 13,669,514,000    
Loans, net    
Investment property 1,540,615,000 1,381,788,000    
Total assets 17,005,204,000 15,706,165,000    
Deposits and obligations    
Due to banks and correspondents 120,459,000 301,139,000    
Bonds, notes and other obligations 342,687,000 335,007,000    
Insurance and reinsurance contract liabilities 12,924,459,000 12,385,525,000    
Total liabilities 15,625,799,000 14,526,553,000    
Equity attributable to IFS's shareholders 1,379,405,000 1,179,612,000    
Consolidated statement of income -        
Net interest and similar income 788,297,000 771,400,000    
(Loss) recovery due to impairment on loans, net of recoveries    
(Loss) recovery due to impairment of financial investments (264,123,000) (45,910,000)    
Net gain of investment property 101,104,000 60,260,000    
Fee income from financial services, net (12,622,000) (10,628,000)    
Result from insurance activities (47,777,000) (169,750,000)    
Net profit for the year attributable to IFS's shareholders 339,296,000 269,568,000    
Inteligo and Subsidiaries [Member]        
Consolidated statement of financial position -        
Cash and due from banks 420,559,000 533,575,000    
Financial Investments 2,012,524,000 1,986,408,000    
Loans, net 1,499,171,000 1,622,503,000    
Investment property      
Total assets 4,118,540,000 4,316,010,000    
Deposits and obligations 2,632,943,000 2,929,343,000    
Due to banks and correspondents 315,148,000 265,772,000    
Bonds, notes and other obligations    
Insurance and reinsurance contract liabilities    
Total liabilities 3,019,002,000 3,271,899,000    
Equity attributable to IFS's shareholders 1,099,538,000 1,044,111,000    
Consolidated statement of income -        
Net interest and similar income 61,504,000 69,694,000    
(Loss) recovery due to impairment on loans, net of recoveries 20,000 (266,000)    
(Loss) recovery due to impairment of financial investments 376,000 (585,000)    
Net gain of investment property    
Fee income from financial services, net 195,956,000 170,955,000    
Result from insurance activities    
Net profit for the year attributable to IFS's shareholders S/ 231,136,000 S/ 137,336,000