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Crewmember Retirement Plan (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Percentage of employees pay (in percent) |  |  | 100.00% |
Crewmember contribution percentage (in percent) |  |  | 5.00% |
Percentage of compensation in cash |  |  | 3 years |
Percentage of company contribution to pilots retirement program |  |  | 17.00% |
Pilots retirement vesting period |  |  | 3 years |
Defined contribution plan, cost | $ 74 | $ 61 | $ 149 | $ 127
Retirement Non-elective Licensed |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Crewmember contribution percentage (in percent) |  |  | 8.00% |
Percentage of compensation in cash |  |  | 3 years |
Retirement Non-elective Crewmember |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Crewmember contribution percentage (in percent) |  |  | 5.00% |

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- Definition Defined Contribution Plan Requisite Service Period For Vesting + References No definition available. + Details
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- Definition Percentage of Company contribution to Pilots Retirement Program based on eligible pilot compensation + References No definition available. + Details
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- Definition Vesting period for company matching contributions relating to pilots retirement program + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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- Details
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