Debt Instrument, Guarantee Borrowings on Third Party Debt

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Debt Instrument, Guarantee Borrowings on Third Party Debt, Term

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Derivative, Nonmonetary Notional Amount, Shares

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[Line Items] for Equity Method Investments [Table]

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Amount of equity securities categorized neither as held-to-maturity nor as trading.

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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Investments - Narrative (Details) - USD ($) shares in Millions	1 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	May. 31, 2016
Equity Method Investments [Line Items]
Net (loss) gain on investments		$ (45,000,000)	$ 10,000,000	$ (19,000,000)
Payments to Acquire Equity Method Investments		$ 500,000,000	$ 0	$ 360,000,000
Virgin Atlantic
Equity Method Investments [Line Items]
Noncontrolling interest, ownership percentage by parent	49.00%
Payments to Acquire Equity Method Investments	$ 360,000,000
GOL
Equity Method Investments [Line Items]
Ownership percentage		9.50%
China Eastern
Equity Method Investments [Line Items]
Cost method investments		$ 450,000,000
Ownership percentage in cost method investments		3.50%
Preferred stock \| GOL
Equity Method Investments [Line Items]
Underlying equity in net assets		$ 50,000,000
Fair value of investment		21,000,000
Net (loss) gain on investments		(84,000,000)
Term loan facility \| GOL
Equity Method Investments [Line Items]
Guarantee borrowings on third party debt		$ 300,000,000
Guarantee borrowings on third party debt, term		5 years
Equity Contract \| Grupo Aeromexico
Equity Method Investments [Line Items]
Derivative, nonmonetary notional amount, shares		58.9
Equity Contract \| Grupo Aeromexico \| Forecast
Equity Method Investments [Line Items]
Noncontrolling interest, ownership percentage by parent					49.00%