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SHAREHOLDER'S EQUITY CARES Act Issuance (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Class of Warrant or Right [Line Items]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 539,508  
Class of Warrant or Right, Outstanding 1,882,518  
Adjustments to Additional Paid in Capital, Warrant Issued $ 16  
US Treasury CARES Act Loan    
Class of Warrant or Right [Line Items]    
Adjustments to Additional Paid in Capital, Warrant Issued   $ 6
PSP 1 Warrants    
Class of Warrant or Right [Line Items]    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 31.61  
Class of Warrant or Right, Outstanding 928,127  
CARES Act Loan Program Warrants    
Class of Warrant or Right [Line Items]    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 31.61  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   427,080
Class of Warrant or Right, Outstanding 427,080  
PSP 2 Warrants    
Class of Warrant or Right [Line Items]    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 52.25  
Class of Warrant or Right, Outstanding 305,499  
PSP 3 Warrants    
Class of Warrant or Right [Line Items]    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 66.39  
Class of Warrant or Right, Outstanding 221,812