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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract] |
Contractual Purchase Commitments | As of December 31, 2014, the Company had firm deliveries and options for Boeing 737-700, 737-800, 737 MAX 7, and 737 MAX 8 aircraft as follows:
| The Boeing Company 737 NG |  | The Boeing Company 737 MAX |  |
| -700 Firm Orders |  | -800 Firm Orders | Options | Additional -700 A/C | -7 Firm Orders | -8 Firm Orders |  | Options |  | Total
2015 | — |  | 19 | — | 16 | — | — |  | — |  | 35
2016 | 31 |  | — | 11 | 4 | — | — |  | — |  | 46
2017 | 15 |  | — | 12 | — | — | 14 |  | — |  | 41
2018 | 10 |  | — | 12 | — | — | 13 |  | — |  | 35
2019 | — |  | — | — | — | 15 | 10 |  | — |  | 25
2020 | — |  | — | — | — | 14 | 22 |  | — |  | 36
2021 | — |  | — | — | — | 1 | 33 |  | 18 |  | 52
2022 | — |  | — | — | — | — | 30 |  | 19 |  | 49
2023 | — |  | — | — | — | — | 24 |  | 23 |  | 47
2024 | — |  | — | — | — | — | 24 |  | 23 |  | 47
2025 | — |  | — | — | — | — | — |  | 36 |  | 36
2026 | — |  | — | — | — | — | — |  | 36 |  | 36
2027 | — |  | — | — | — | — | — |  | 36 |  | 36
Total | 56 | (1) | 19 | 35 | 20 | 30 | 170 | (2) | 191 |  | 521
(1) The Company has flexibility to substitute 737-800s in lieu of 737-700 firm orders. (2) The Company has flexibility to substitute MAX 7 in lieu of MAX 8 firm orders beginning in 2019.

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- Definition Tabular disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle, if longer, including the item for which expenditures will be made, minimum quantities, milestones, time period and committed amount. + References No definition available. + Details
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