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Consolidation of financial statements of any company in which the ownership interest is equal to or less than the stated percentage will not be performed.

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The aggregate expected value at the end of their useful life of spare parts. The expected value is based on a percentage of the spare parts original cost.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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- Definition

Amount of expense for amortization of capitalized computer software costs.

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

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The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount of borrowings classified as other, maturing within one year or the normal operating cycle, if longer.

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The amount of a reclassification adjustment made to prior period financial statement amounts.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2016
Ownership interest	50.00%
Excess tax benefits	$ 33
Depreciation and amortization expense related to property and equipment	1,900	$ 1,800	$ 1,700
Amortization of capitalized software	160	148	129
Net book value of capitalized software	549	420
Advertising expense	277	225	$ 225
Fuel Card Obligation [Member]
Line of credit facility, maximum borrowing capacity	800
Fuel card obligation	$ 432	221
Maximum
Spare parts, estimated residual value	10.00%
Minimum
Spare parts, estimated residual value	5.00%
Software and software development costs \| Maximum
Estimated useful life	10 years
Software and software development costs \| Minimum
Estimated useful life	3 years
Grupo Aeromexico
Loss on available for sales securties	$ 38
Retained earnings
Prior period reclassification		$ 2,100
ASU 2016-09 \| New Accounting Pronouncement, Early Adoption, Effect
Previously unrecognized excess tax benefits				$ (95)
ASU 2016-09 \| New Accounting Pronouncement, Early Adoption, Effect \| Retained earnings
Cumulative effect adjustment				$ 95