Commitments and Contingencies - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) aircraft	Dec. 31, 2023 USD ($)
Long-term Purchase Commitment [Line Items]
Number of aircraft on order with manufacturers | aircraft	269
Purchase obligation	$ 17,123,367
Minimum aircraft delivery delays that could trigger lessee cancellation clauses	1 year
Purchase agreements, termination commencement period	1 year
Non-refundable deposits on aircraft	$ 761,438	$ 1,203,068
Minimum
Long-term Purchase Commitment [Line Items]
Expected delays in aircraft deliveries	3 years
Maximum
Long-term Purchase Commitment [Line Items]
Expected delays in aircraft deliveries	4 years
Aircrafts
Long-term Purchase Commitment [Line Items]
Non-refundable deposits on aircraft	$ 800,000	$ 1,200,000