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Financial Instruments (Details 3) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Financial Instrument [Line Items]    
Derivative financial Asset $ 3,412,197 $ 11,522,482
Total Agreements [Member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 22 51
Derivative financial Asset $ 8,240,079 $ 15,060,115
Derivative financial Liability $ 1,045,700 $ 6,348,654
Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 2 2
Derivative financial Asset $ 4,827,882 $ 3,537,633
Derivative financial Liability $ 805,306 $ 1,351,530
Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 20 49
Derivative financial Asset $ 3,412,197 $ 11,522,482
Derivative financial Liability $ 240,394 $ 4,997,124
USD [Member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1 1
Derivative, Nominal amount $ 2,000 $ 2,000
Derivative financial Asset 4,571,984 3,325,079
Derivative financial Liability $ 805,306 $ 1,194,502
USD [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 14 32
Derivative, Nominal amount $ 72,593 $ 269,371
Derivative financial Asset 2,989,286 11,264,711
Derivative financial Liability 160,803 $ 3,832,634
USD [Member] | Not later than one year [member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements   1
Derivative, Nominal amount 0 $ 0
Derivative financial Asset 0 0
Derivative financial Liability 805,306 1,194,502
USD [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Derivative, Nominal amount 26,393 79,326
Derivative financial Asset 412,065 225,815
Derivative financial Liability 79,591 1,153,302
CLP [Member] | Not later than one year [member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Derivative, Nominal amount 0 0
Derivative financial Asset 157,344 212,554
Derivative financial Liability 0 0
CLP [Member] | Later than one year and not later than five years [member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Derivative, Nominal amount 2,000 2,000
Derivative financial Asset 4,571,984 3,325,079
Derivative financial Liability $ 0 $ 0
Euro [Member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1 1
Derivative, Nominal amount $ 11,600 $ 11,600
Derivative financial Asset 255,898 212,554
Derivative financial Liability $ 0 $ 157,028
Euro [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 5 10
Derivative, Nominal amount $ 26,393 $ 79,326
Derivative financial Asset 412,065 225,815
Derivative financial Liability 79,591 1,153,302
Euro [Member] | Not later than one year [member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Derivative, Nominal amount 72,593 269,371
Derivative financial Asset 2,989,286 11,264,711
Derivative financial Liability 160,803 3,832,634
Euro [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Derivative, Nominal amount 800 2,650
Derivative financial Asset 10,846 28,381
Derivative financial Liability $ 0 $ 3,986
Euro [Member] | Later than one year and not later than five years [member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1 -
Derivative, Nominal amount $ 11,600 $ 11,600
Derivative financial Asset 98,554 0
Derivative financial Liability $ 0 $ 157,028
CAD [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1 3
Derivative, Nominal amount $ 800 $ 2,650
Derivative financial Asset 10,846 28,381
Derivative financial Liability 0 3,986
CAD [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Derivative, Nominal amount 0 1,030
Derivative financial Asset 0 3,575
Derivative financial Liability $ 0 $ 7,202
GBP [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements - 4
Derivative, Nominal amount $ 0 $ 1,030
Derivative financial Asset 0 3,575
Derivative financial Liability $ 0 $ 7,202
GBP [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements -