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Investments - Equity Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Equity method investments	$ 77,000,000	$ 43,000,000
JetBlue Ventures equity investments	84,000,000	96,000,000
TWA Flight Center	13,000,000	14,000,000
Total equity investments	174,000,000	153,000,000
Schedule of Equity Method Investments [Line Items]
Unrealized gain from equity method investments			$ 5,000,000
Realized gain (loss) recognized in gain (loss) on investments, net	$ (7,000,000)	2,000,000	(2,000,000)
TWA Flight Center Hotel
Schedule of Equity Method Investments [Line Items]
Ownership percentage, noncontrolling interest	10.00%
Realized gain (loss) recognized in gain (loss) on investments, net	$ 0	$ 0	$ 0

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