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Crewmember Retirement Plan (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Retirement Benefits [Abstract] |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 100.00% |
Percentage of employees' gross pay for which the employer contributes a matching contribution to the Plan. | 5.00% |
Defined Contribution Plan Requisite Service Period | 3 years |
Percentage of employees' gross pay for which the employer can contribute a discretionary profit sharing contribution to the Plan. | 5.00% |
Retirement Plus Contribution Plan Requisite Service Period for Vesting | 3 years |
Percentage of FAA licensed employees gross pay for which ER can contribute discretionary profit sharing contribution to plan | 3.00% |
Percentage of Company Contribution to Pilots Retirement Program | 15.00% |
Pilots Retirement Vesting Period | 3 years |
Percent of Eligible Pre-tax Profits the Company Contributes to Profit Sharing until the Pre-tax Margin is 18% | 10.00% |
Profit Sharing Calculation Trigger, Pretax Margin | 18.00% |
Percentage of Eligible Pre-tax Profits the Company Contributes to Profit Sharing when Pre-tax Margin is above 18% | 20.00% |
Contribution to employee retirement plan | $ 52 | $ 49

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- Definition Percentage of employees' gross pay for which the employer can contribute a discretionary profit sharing contribution to the Plan. + References No definition available. + Details
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- Definition Percentage of Eligible Pre-tax Profits the Company Contributes to Profit Sharing when Pre-tax Margin is above 18% + References No definition available. + Details
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- Definition Percentage of FAA licensed employees gross pay for which ER can contribute discretionary profit sharing contribution to plan + References No definition available. + Details
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- Definition Retirement Plus Contribution Plan Requisite Service Period for Vesting + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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