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TECHNICAL RESERVES FOR INSURANCE CLAIMS AND PREMIUMS (Details 2) - PEN (S/)
S/ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Ending balance S/ 8,452,671 S/ 7,443,760
Life insurance contracts [member]    
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Ending balance 7,062,380 6,226,648
General insurance contracts [Member]    
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Ending balance 1,156,368 998,434
Health insurance contracts [Member]    
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Ending balance 233,923 218,678
Technical claim reserve [Member]    
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Beginning balance 6,262,908 5,848,192
Time course expenses and others (117,965) 77,855
Unearned premium and other technical reserves variation, net 79,349 (24,244)
Insurance subscriptions 724,458 491,519
Exchange difference and others 137,251 (130,414)
Ending balance 7,086,001 6,262,908
Technical claim reserve [Member] | Life insurance contracts [member]    
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Beginning balance 5,599,777 5,128,974
Time course expenses and others (117,965) 77,855
Unearned premium and other technical reserves variation, net 1,901 127
Insurance subscriptions 724,458 491,519
Exchange difference and others 121,341 (98,698)
Ending balance 6,329,512 5,599,777
Technical claim reserve [Member] | General insurance contracts [Member]    
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Beginning balance 513,826 574,435
Time course expenses and others 0 0
Unearned premium and other technical reserves variation, net 64,302 (28,992)
Insurance subscriptions 0 0
Exchange difference and others 15,810 (31,617)
Ending balance 593,938 513,826
Technical claim reserve [Member] | Health insurance contracts [Member]    
Disclosure of insurance claim reserves and technical reserves [Line Items]    
Beginning balance 149,305 144,783
Time course expenses and others 0 0
Unearned premium and other technical reserves variation, net 13,146 4,621
Insurance subscriptions 0 0
Exchange difference and others 100 (99)
Ending balance S/ 162,551 S/ 149,305