Equity - Additional information (Detail) |
1 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2026
PEN (S/)
|
Mar. 31, 2026
USD ($)
$ / shares
|
Mar. 31, 2025
PEN (S/)
|
Mar. 31, 2025
USD ($)
$ / shares
|
Nov. 12, 2024
PEN (S/)
|
Apr. 01, 2024
PEN (S/)
|
Apr. 01, 2024
USD ($)
$ / shares
|
Mar. 31, 2023
PEN (S/)
|
Mar. 31, 2023
USD ($)
$ / shares
|
Jul. 31, 2019
$ / shares
|
Dec. 31, 2025
PEN (S/)
shares
|
Dec. 31, 2025
USD ($)
shares
|
Dec. 31, 2024
PEN (S/)
shares
|
Dec. 31, 2024
USD ($)
shares
|
Dec. 31, 2023
PEN (S/)
shares
|
Dec. 31, 2025
USD ($)
shares
|
Dec. 31, 2024
USD ($)
shares
|
|
| Disclosure of classes of share capital [line items] | |||||||||||||||||
| Common stock, nominal value | $ / shares | $ 0 | ||||||||||||||||
| Common stock, issuance value per share | $ / shares | $ 9.72 | ||||||||||||||||
| Subscribed and paid-in common shares | shares | 115,447,705 | 115,447,705 | 115,447,705 | 115,447,705 | |||||||||||||
| Dividends distribution declared | S/ 427,369,000 | $ 115,443,000 | S/ 511,788,000 | $ 136,222,000 | |||||||||||||
| Dividends distribution declared, per share | $ / shares | $ 1 | $ 1.18 | |||||||||||||||
| Entity shares held by subsidiary, shares | shares | 3,618,000 | 3,618,000 | |||||||||||||||
| Entity shares held by subsidiary, value | S/ 372,017,000 | ||||||||||||||||
| Regulatory capital requirement | According to Legislative Decree No. 1028 and amendments, Interbank’s regulatory capital must be equal to or higher than 10 percent of the assets and contingent credits weighted by total risk represented by the sum of: the regulatory capital requirement for market risk multiplied by 10, the regulatory capital requirement for operational risk multiplied by 10 and the assets and contingent credits weighted by credit risk. | According to Legislative Decree No. 1028 and amendments, Interbank’s regulatory capital must be equal to or higher than 10 percent of the assets and contingent credits weighted by total risk represented by the sum of: the regulatory capital requirement for market risk multiplied by 10, the regulatory capital requirement for operational risk multiplied by 10 and the assets and contingent credits weighted by credit risk. | |||||||||||||||
| Additional regulatory capital | S/ 829,445,000 | S/ 731,841,000 | |||||||||||||||
| Percentage of solvency | 35.00% | 35.00% | |||||||||||||||
| Legal and special reserves | S/ 1,893,313,000 | 1,779,383,000 | |||||||||||||||
| Purchase of treasury shares | S/ 262,549,000 | 122,688,000 | S/ 80,946,000 | ||||||||||||||
| Repurchase Of Treasury Shares Value | $ | $ 100,000,000 | $ 100,000,000 | |||||||||||||||
| Dividend Proposed [Member] | |||||||||||||||||
| Disclosure of classes of share capital [line items] | |||||||||||||||||
| Dividends distribution declared | S/ 723,965,000 | $ 207,797,000 | S/ 420,096,000 | $ 115,443,000 | |||||||||||||
| Dividends distribution declared, per share | $ / shares | $ 1.8 | $ 1 | |||||||||||||||
| Interbank [Member] | |||||||||||||||||
| Disclosure of classes of share capital [line items] | |||||||||||||||||
| Entity shares held by subsidiary, shares | shares | 700,000 | 700,000 | |||||||||||||||
| Entity shares held by subsidiary, value | S/ 91,915,000 | ||||||||||||||||
| Purchase of treasury shares | S/ 168,308,000 | S/ 122,688,000 | S/ 81,021,000 | ||||||||||||||
| Purchase Of Treasury Share | shares | 1,488,000 | 1,488,000 | 1,192,000 | 1,192,000 | 938,000 | ||||||||||||
| Interfondos SA Sociedad Administradora de Fondos [Member] | |||||||||||||||||
| Disclosure of classes of share capital [line items] | |||||||||||||||||
| Entity shares held by subsidiary, shares | shares | 4,365,000 | 2,159,000 | 4,365,000 | 2,159,000 | |||||||||||||
| Entity shares held by subsidiary, value | S/ 469,546,000 | S/ 206,997,000 | $ 127,821,000 | $ 55,704,000 | |||||||||||||
| Interfondos SA Sociedad Administradora de Fondos [Member] | Common Shares | |||||||||||||||||
| Disclosure of classes of share capital [line items] | |||||||||||||||||
| Purchase of treasury shares | S/ 2,326,000 | $ 656,000 | S/ 169,000 | $ 45,000 | |||||||||||||
| Purchase Of Treasury Share | shares | 18,000 | 18,000 | 2,000 | 2,000 | |||||||||||||
| Reserve [Member] | |||||||||||||||||
| Disclosure of classes of share capital [line items] | |||||||||||||||||
| Reserve charged to retained earnings | S/ 800,000,000 | S/ 2,300,000,000 | |||||||||||||||