Fair Value Measurements and Other Investments - Narrative (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended
	Apr. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
GOL
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment, at fair value	$ 200
Ownership percentage	5.30%
Intangible assets, amount derived from investment	$ 119
GOL | Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred shares acquired (in shares)	22.2
Preferred stock acquired, fair value	$ 81
American Airlines, Inc. | GOL
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment, at fair value	$ 200
Ownership percentage	5.30%
Intangible assets, amount derived from investment	$ 119
American Airlines, Inc. | GOL | Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred shares acquired (in shares)	22.2
Preferred stock acquired, fair value	$ 81
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value		$ 3,700	$ 3,700
Level 2 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value		33,139	38,567
Level 2 | Convertible Note | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value		1,000	1,400
Level 2 | American Airlines, Inc. | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value		$ 29,257	$ 32,999