IDEA: XBRL DOCUMENT

|**Current Tax Assets and Liabilities (Tables)**                 | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|--------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|**Disclosure Of Current Tax Assets And Liabilities [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Disclosure Of Current Tax Receivables Explanatory               | a) The detail of current tax receivables as of December 31, 2018 and 2017 is as follows:
		Balance as of12-31-2018
				
				12-31-2017Tax Receivables
				ThUS$
				
				ThUS$Monthly provisional tax payments
				44,798
				
				43,235Other
				6,196
				
				4,158Total
				50,994
				
				47,393
		
		a)
			The detail of current tax payables as of December 31, 2018 and 2017, is as follows:
		Balance as of12-31-2018
				
				12-31-2017Tax Payables
				ThUS$
				
				ThUS$Income tax
				192,924
				
				172,638Total
				192,924
				
				172,638
|                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                | Balance as of                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|                                                                | 12-31-2018                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Tax Receivables                                                 | ThUS$                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Monthly provisional tax payments                                | 44,798                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Other                                                           | 6,196                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Total                                                           | 50,994                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                                                | a)
			The detail of current tax payables as of December 31, 2018 and 2017, is as follows:                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                | Balance as of                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|                                                                | 12-31-2018                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Tax Payables                                                    | ThUS$                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Income tax                                                      | 192,924                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Total                                                           | 192,924                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

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