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Other Current Assets
 12 Months Ended
Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Current Assets Other Current AssetsOther current assets consist of the following (in millions):
December 31,
20212020
Prepaid expenses$14 $24 
Passenger and other taxes receivable9 26 
Income tax receivable3 161 
Other14 15 
Total other current assets$40 $226