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Commitments and Contingencies Collective Bargaining (Tables)
12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Employees Under Collective Bargaining Agreements [Table Text Block]
The Company is party to collective bargaining agreements with the employee groups listed below. As of December 31, 2020 the percentage of full-time equivalent employees for these pay groups were as follows:
As of December 31, 2020
Flight Attendants36.1 %
Pilots23.2 
Flight Dispatchers1.1 
Total60.3 %