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NET CLAIMS INCURRED FOR LIFE, GENERAL AND HEALTH INSURANCE CONTRACTS (Details) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims S/ 1,554,477 S/ 1,239,635 S/ 1,118,304
Life insurance contracts [member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims 901,239 636,867 566,181
General insurance [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims 338,440 305,368 269,845
Health insurance contracts [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims 314,798 297,400 282,278
Gross claims [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims 1,875,852 1,607,604 1,601,691
Gross claims [Member] | Life insurance contracts [member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims 1,001,671 737,982 646,026
Gross claims [Member] | General insurance [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims 547,201 562,440 661,108
Gross claims [Member] | Health insurance contracts [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims 326,980 307,182 294,557
Ceded claims [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims (321,375) (367,969) (483,387)
Ceded claims [Member] | Life insurance contracts [member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims (100,432) (101,115) (79,845)
Ceded claims [Member] | General insurance [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims (208,761) (257,072) (391,263)
Ceded claims [Member] | Health insurance contracts [Member]      
Disclosure of claims and benefits incurred [Line Items]      
Net insurance claims S/ (12,182) S/ (9,782) S/ (12,279)