Special Charges and Credits	12 Months Ended
Special Charges and Credits	Dec. 31, 2025
Special Charges and Credits [Abstract]
Special Charges and Credits	Special Charges and Credits Special Charges (Credits) During the Successor Period, the Company recorded a credit of $30.0 million within special charges (credits) on the Company's consolidated statements of operations. The credit incurred during the fourth quarter of the Successor Period related to a one-time assignment fee remitted to the Company, resulting from the assignment agreement for airline use and lease agreement at ORD for two gates to American Airlines, Inc. (the "AA Assignee"). Furthermore, the related cash inflow is included within operating activities in the Company's consolidated statements of cash flows. No special charges (credits) were recorded during the Current Predecessor Period. During the twelve months ended December 31, 2024, the Company recorded $28.1 million in net charges within special charges (credits) on the Company's consolidated statements of operations, in legal, advisory and other fees related to the former Merger Agreement with JetBlue entered into on July 28, 2022 and terminated on March 1, 2024. In addition, as part of the Merger Agreement with JetBlue, the Company implemented an employee retention award program (the "JetBlue Retention Award Program") during the third quarter of 2022. The first installment was paid in July 2023, and the second installment was paid in March 2024 upon termination of the former JetBlue Merger Agreement. During the twelve months ended December 31, 2024, the Company recorded $8.0 million within special charges (credits) on the Company's consolidated statements of operations, related to the JetBlue Retention Award Program. During the twelve months ended December 31, 2023, the Company recorded $50.0 million within special charges (credits) on the Company's consolidated statements of operations in legal, advisory and other fees related to the former Merger Agreement with JetBlue entered into on July 28, 2022 and terminated on March 1, 2024. During the twelve months ended December 31, 2023, the Company recorded $19.5 million within special charges (credits) on the Company's consolidated statements of operations, related to the JetBlue Retention Award Program. Special Charges (Credits), Non-Operating During the Successor Period and Current Predecessor Period, the Company recorded $29.0 million and $5.5 million, respectively, in special charges (credits), non-operating within other (income) expense in the consolidated statement of operations. Charges incurred during the Successor Period primarily related to post-emergence restructuring expenses related to the 2024 Bankruptcy, including professional fees and other related costs, as well amounts related to the pilot furloughs. In addition, these charges include legal, advisory and other fees related to the Company's voluntary bankruptcy filing in 2025, prior to the petition date of August 29, 2025. Refer to Note 3, 2025 Chapter 11 Bankruptcy Proceedings for additional information on the Company's 2025 Bankruptcy proceedings. Charges incurred during the Current Predecessor Period primarily consisted of legal, advisory and other fees. During the twelve months ended December 31, 2024, the Company recorded $15.5 million in special charges, non-operating within other (income) expense in the consolidated statement of operations in legal, advisory and other fees related to the Company's voluntary bankruptcy filing, incurred prior to the petition filing date of November 18, 2024. Refer to Note 3, 2025 Chapter 11 Bankruptcy Proceedings for additional information on the Company's bankruptcy proceedings. During the twelve months ended December 31, 2023, the Company had no special charges, non-operating within other (income) expense in the consolidated statements of operations.