v3.26.1
Equity - Summary of unrealized results (Detail) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of classes of share capital [line items]      
Beginning period S/ (187,830) S/ (457,793) S/ (554,421)
Effect of changes in the discount rates of pension reserves, (735,284) (61,299) (968,599)
Unrealized gain from equity instruments at fair value through other comprehensive income, net of unrealized loss 69,079 1,263 16,055
Transfer to retained earnings from realized gain (loss) from equity instruments at fair value through other comprehensive income   53,737 (33,433)
Unrealized gain (loss) from debt instruments at fair value through other comprehensive income, net of unrealized gain (loss) 730,337 259,523 1,128,206
Transfer to realized gain from debt instruments at fair value through other comprehensive income, net of realized loss (101,536) (25,325) (8,350)
Transfer of impairment gain (recovery) on debt instruments at fair value through other comprehensive income 263,368 47,497 7,390
Variation for net unrealized gain (loss) on cash flow hedges 92,950 (57,848) (67,980)
Transfer of realized loss on cash flow hedges to consolidated statement of income, net of realized gain (53,046) 40,668 45,309
Translation of foreign operations (101,063) 11,747 (21,970)
Other movements (13,009)    
Ending period (36,034) (187,830) (457,793)
Equity instruments at fair value [Member]      
Disclosure of classes of share capital [line items]      
Beginning period (9,141) (64,141) (46,763)
Unrealized gain from equity instruments at fair value through other comprehensive income, net of unrealized loss 69,079 1,263 16,055
Transfer to retained earnings from realized gain (loss) from equity instruments at fair value through other comprehensive income   53,737 (33,433)
Other movements (13,009)    
Ending period 46,929 (9,141) (64,141)
Debt instruments at fair [Member]      
Disclosure of classes of share capital [line items]      
Beginning period (1,011,868) (1,293,563) (2,420,809)
Unrealized gain (loss) from debt instruments at fair value through other comprehensive income, net of unrealized gain (loss) 730,337 259,523 1,128,206
Transfer to realized gain from debt instruments at fair value through other comprehensive income, net of realized loss (101,536) (25,325) (8,350)
Transfer of impairment gain (recovery) on debt instruments at fair value through other comprehensive income 263,368 47,497 7,390
Ending period (119,699) (1,011,868) (1,293,563)
Insurance contracts reserves [Member]      
Disclosure of classes of share capital [line items]      
Beginning period 681,595 742,894 1,711,493
Effect of changes in the discount rates of pension reserves, (735,284) (61,299) (968,599)
Ending period (53,689) 681,595 742,894
Cash flow hedges [Member]      
Disclosure of classes of share capital [line items]      
Beginning period (49,113) (31,933) (9,262)
Variation for net unrealized gain (loss) on cash flow hedges 92,950 (57,848) (67,980)
Transfer of realized loss on cash flow hedges to consolidated statement of income, net of realized gain (53,046) 40,668 45,309
Ending period (9,209) (49,113) (31,933)
Translation of foreign operations      
Disclosure of classes of share capital [line items]      
Beginning period 200,697 188,950 210,920
Translation of foreign operations (101,063) 11,747 (21,970)
Ending period S/ 99,634 S/ 200,697 S/ 188,950