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Revenue Recognition - Revenue Recognized By Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Passenger travel	$ 1,773	$ 420	$ 3,717	$ 1,973
Loyalty revenue - air transportation	83	25	196	153
Loyalty revenue	80	38	206	127
Other revenue	36	9	84	42
Total revenue	$ 1,972	$ 492	$ 4,203	$ 2,295

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- Definition

Other Revenue - Loyalty

+ References

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- Definition

Other Revenue - Non Loyalty

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- Definition

Passenger Revenue - Loyalty Air Travel

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- Definition

Revenue recognized from passenger travel

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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