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MERGER AND ACQUISITIONS (Details) - PEN (S/)
S/ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Acquisitions, Transfers And Merger [Line Items]      
Payment made / execution of sale option S/ (174,472) S/ 0 S/ (489,866)
Companies acquired [Member]      
Disclosure Of Acquisitions, Transfers And Merger [Line Items]      
Assets and liabilities acquired / Non controlling interest 216,373    
Payment made / execution of sale option (489,866)    
Higher value paid (273,493)    
Inversiones IMT S.A. [Member]      
Disclosure Of Acquisitions, Transfers And Merger [Line Items]      
Assets and liabilities acquired / Non controlling interest 103,630    
Payment made / execution of sale option (241,420)    
Higher value paid (137,790)    
Credicorp Capital Colombia S.A. [Member]      
Disclosure Of Acquisitions, Transfers And Merger [Line Items]      
Assets and liabilities acquired / Non controlling interest 69,482    
Payment made / execution of sale option (152,379)    
Higher value paid (82,897)    
Coby Business Inc. y Artigas Global Corp. [Member]      
Disclosure Of Acquisitions, Transfers And Merger [Line Items]      
Assets and liabilities acquired / Non controlling interest 43,261    
Payment made / execution of sale option (96,067)    
Higher value paid S/ (52,806)