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Supplemental Financial Information - Accounts Payable (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable trade	$ 320	$ 156
Salaries payable	259	287
Taxes payable excluding income taxes	319	200
Aircraft maintenance payable	53	42
Fuel payable	208	170
Other payable	489	427
Accounts payable	$ 1,648	$ 1,282

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Carrying value as of the balance sheet date of obligations incurred and payable for aircraft maintenance. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable for fuel. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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