NET PREMIUMS EARNED - Life Insurance Gross Written Premiums After Adjustments (Details) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Revenue from insurance contracts issued, without reduction for reinsurance held [1] S/ 2,884,845 S/ 2,642,947 S/ 2,308,143
Life insurance contracts [member]      
Revenue from insurance contracts issued, without reduction for reinsurance held [1] S/ 1,245,858 S/ 1,144,159 S/ 887,322
Servicewise participation rate in Life Insurance Gross Premium 100.00% 100.00% 100.00%
Credit life [Member] | Life insurance contracts [member]      
Revenue from insurance contracts issued, without reduction for reinsurance held S/ 536,091 S/ 507,496 S/ 436,443
Servicewise participation rate in Life Insurance Gross Premium 43.03% 44.36% 49.19%
Disability And Survival [Member] | Life insurance contracts [member]      
Revenue from insurance contracts issued, without reduction for reinsurance held [2] S/ 470,066 S/ 272,144 S/ 237,559
Servicewise participation rate in Life Insurance Gross Premium [2] 37.73% 23.79% 26.77%
Individual Life [Member] | Life insurance contracts [member]      
Revenue from insurance contracts issued, without reduction for reinsurance held [3] S/ 60,705 S/ 203,662 S/ 69,647
Servicewise participation rate in Life Insurance Gross Premium [3] 4.87% 17.80% 7.85%
Groupo life [Member] | Life insurance contracts [member]      
Revenue from insurance contracts issued, without reduction for reinsurance held S/ 128,656 S/ 113,273 S/ 117,580
Servicewise participation rate in Life Insurance Gross Premium 10.33% 9.90% 13.25%
Annuities [Member] | Life insurance contracts [member]      
Revenue from insurance contracts issued, without reduction for reinsurance held S/ 50,340 S/ 47,584 S/ 26,093
Servicewise participation rate in Life Insurance Gross Premium 4.04% 4.15% 2.94%
[1] This item includes earned premiums, reinsurance premiums accepted and coinsurance premiums accepted and received.
[2] This item includes Complementary Work Risk Insurance (“SCTR” from its Spanish acronym).
[3] Individual life insurance premiums include Investment Link insurance contracts.