Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jul. 28, 2022	Dec. 31, 2021	Dec. 31, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Remaining customer travel funds					$ 1,900
Residual travel funds	600.00%		600.00%			1600.00%	200.00%
Loyalty points, redemption period (in years)			2 years
Total operating revenues	$ 6,220	$ 4,679	$ 17,642	$ 10,739
Chase Bank USA Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total operating revenues	$ 521	$ 355	$ 1,500	$ 987