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FINANCIAL RISK MANAGEMENT (Details 19) - PEN (S/)
S/ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about assigned value of financial assets [Line Items]    
Assigned value of the financial assets S/ 107,643 S/ 102,744
Pension funds [Member]    
Disclosure of detailed information about assigned value of financial assets [Line Items]    
Assigned value of the financial assets 47,452 48,868
Investment funds [member]    
Disclosure of detailed information about assigned value of financial assets [Line Items]    
Assigned value of the financial assets 40,186 37,567
Equity managed [Member]    
Disclosure of detailed information about assigned value of financial assets [Line Items]    
Assigned value of the financial assets 15,397 12,874
Bank trusts [Member]    
Disclosure of detailed information about assigned value of financial assets [Line Items]    
Assigned value of the financial assets S/ 4,608 S/ 3,435