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INTANGIBLE ASSETS AND GOODWILL, NET - Additional Information (Details)
S/ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2019
PEN (S/)
Dec. 31, 2018
PEN (S/)
Disclosure of detailed information about intangible assets [line items]      
Impairment loss   S/ 1,410 S/ 1,060
Activation of intangibles in progress   64,900  
DataLake system      
Disclosure of detailed information about intangible assets [line items]      
Activation of intangibles in progress | $ $ 19.7    
Inversioners IMT [Member]      
Disclosure of detailed information about intangible assets [line items]      
Impairment loss   S/ 38,200