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Investments - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Equity method investments	$ 39,000,000		$ 39,000,000		$ 38,000,000
Gain (loss) from equity method investments	0		0	$ 2,000,000
Debt securities, realized gain (loss)	4,000,000		6,000,000
Debt securities, unrealized gain (loss)		$ (6,000,000)		$ (8,000,000)
Cost method investments - jetblue tech ventures	$ 90,000,000		$ 90,000,000		83,000,000
Measurement alternative, ownership percentage (in percent)	10.00%		10.00%
Cost method investments - TWA flight center hotel	$ 14,000,000		$ 14,000,000		14,000,000
Fair Value, Recurring
Debt and Equity Securities, FV-NI [Line Items]
Equity investment securities					8,000,000
Level 1 | Fair Value, Recurring
Debt and Equity Securities, FV-NI [Line Items]
Equity investment securities	$ 0		$ 0		$ 8,000,000

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Cost Method Investments - JetBlue Tech Ventures

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