Investments (Narrative) (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Grupo Aeromexico
Schedule of Available-for-sale Securities
Ownership percentage	4.10%
Potential change in ownership percentage due to the settlement of derivatives	8.10%
Potential change ownership percentage	49.00%
Maximum settlement value for additional shares	$ 700,000,000
GOL
Schedule of Available-for-sale Securities
Ownership percentage		9.50%
China Eastern
Schedule of Available-for-sale Securities
Ownership percentage in cost method investment		3.50%
Restriction of sale or transfer of shares period		3 years
Preferred stock \| GOL
Schedule of Available-for-sale Securities
Fair value of investment	34,000,000
Loss on Investments	$ 72,000,000
Term loan facility \| GOL
Schedule of Available-for-sale Securities
Guarantee borrowings on third party debt		$ 300,000,000
Guarantee borrowings on third party debt, term		5 years

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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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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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