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Financial Instruments (Details 3) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of Financial Instrument [Line Items]    
Derivative financial Asset $ 222,443 $ 3,412,197
Total Agreements [Member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 33 22
Derivative financial Asset $ 16,836,927 $ 8,240,079
Derivative financial Liability $ 9,567,579 $ 1,045,700
Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 5 2
Derivative financial Asset $ 16,614,484 $ 4,827,882
Derivative financial Liability $ 5,323,640 $ 805,306
Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 28 20
Derivative financial Asset $ 222,443 $ 3,412,197
Derivative financial Liability $ 4,243,939 $ 240,394
USD [Member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 4 1
Derivative, Nominal amount $ 10,000 $ 2,000
Derivative financial Asset 16,614,484 4,571,984
Derivative financial Liability $ 4,815,182 $ 805,306
USD [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 21 14
Derivative, Nominal amount $ 101,418 $ 72,593
Derivative financial Asset 63,143 2,989,286
Derivative financial Liability $ 4,118,216 160,803
USD [Member] | Not later than one year [member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements -  
Derivative, Nominal amount $ 0 0
Derivative financial Asset 4,661,049 0
Derivative financial Liability $ 4,815,182 805,306
USD [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 21  
Derivative, Nominal amount $ 23,884 26,393
Derivative financial Asset 9,819 412,065
Derivative financial Liability $ 125,723 $ 79,591
USD [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 4 1
CLP [Member] | Not later than one year [member] | Interest rate swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Derivative, Nominal amount $ 11,600 $ 0
Derivative financial Asset 0 157,344
Derivative financial Liability 508,458 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 10,000 2,000
Derivative financial Asset 11,953,435 4,571,984
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 0 255,898
Derivative financial Liability $ 508,458 $ 0
Euro [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 5 5
Derivative, Nominal amount $ 23,884 $ 26,393
Derivative financial Asset 9,819 412,065
Derivative financial Liability $ 125,723 79,591
Euro [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 $ 101,418 72,593
Derivative financial Asset 63,143 2,989,286
Derivative financial Liability $ 4,118,216 160,803
Euro [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 5  
Derivative, Nominal amount $ 2,500 800
Derivative financial Asset 100,958 10,846
Derivative financial Liability $ 0 $ 0
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 $ 0 $ 11,600
Derivative financial Asset 0 98,554
Derivative financial Liability $ 0 $ 0
CAD [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1 1
Derivative, Nominal amount $ 2,500 $ 800
Derivative financial Asset 100,958 10,846
Derivative financial Liability $ 0 0
CAD [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1  
Derivative, Nominal amount $ 800 0
Derivative financial Asset 48,523 0
Derivative financial Liability $ 0 $ 0
GBP [Member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1 -
Derivative, Nominal amount $ 800 $ 0
Derivative financial Asset 48,523 0
Derivative financial Liability $ 0 $ 0
GBP [Member] | Not later than one year [member] | Currency swap contract [member]    
Disclosure of Financial Instrument [Line Items]    
Number of agreements 1 -