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Grants and other liabilities (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
Type
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Oct. 02, 2013
USD ($)
Grants and other liabilities [Abstract]        
Grants $ 1,058,053   $ 1,087,553  
Other Liabilities 544,102   554,199  
Grant and other non-current liabilities $ 1,602,155   1,641,752  
Number of grant types | Type 2      
Income from grants $ 29,503 $ 29,578    
Solana and Mojave [Member]        
Grants and other liabilities [Abstract]        
Income from grants 29,400 $ 29,500    
U.S. Department of Treasury [Member]        
Grants and other liabilities [Abstract]        
Grants 691,000   707,000  
Federal Financing Bank [Member]        
Grants and other liabilities [Abstract]        
Grants 366,000   379,000  
Liberty Interactive Corporation [Member]        
Grants and other liabilities [Abstract]        
Grant and other non-current liabilities 394,000   380,000  
Class A membership investment       $ 300,000
Finance lease liabilities 48,600   53,800  
Dismantling provision $ 60,100   $ 59,700