Equity Securities, FV-NI, Ownership Percentage

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- Definition

Financing Receivable Issued

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- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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- Definition

Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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- Definition

For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.

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- Definition

Amount of long-term notes payable classified as other.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
Investments - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Investments [Line Items]
Gain/(loss) on investments, net	$ 211	$ 8	$ 473	$ (104)
CLEAR
Investments [Line Items]
Ownership interest (percent)	6.00%		6.00%		6.00%
Long-term investments	$ 331		$ 331		$ 120
Grupo Aeromexico
Investments [Line Items]
Long-term investments	0		0
LATAM
Investments [Line Items]
Long-term investments	0		0
Virgin Atlantic
Investments [Line Items]
Long-term investments	0		0
Grupo Aeromexico, LATAM, and Virgin Atlantic
Investments [Line Items]
Receivable	530		530
Grupo Aeromexico
Investments [Line Items]
Receivable	185		185
GOL
Investments [Line Items]
Loan issued					$ 250
Support for investee carriers \| Grupo Aeromexico, LATAM, and Virgin Atlantic
Investments [Line Items]
Notes payable	530		530
Support for investee carriers \| Grupo Aeromexico
Investments [Line Items]
Notes payable	$ 185		$ 185