Commitments and Contingencies - Narrative (Details) $ in Billions	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 22, 2026 USD ($) option	Sep. 30, 2026 aircraft	Sep. 30, 2026 aircraft	Dec. 27, 2019 claim
Long-term Purchase Commitment [Line Items]
Number of aircraft retirements		20
Number of claims alleged in litigation case \| claim				7
Subsequent Event
Long-term Purchase Commitment [Line Items]
Capital commitments for 2028 \| $	$ 2.8
B737-8
Long-term Purchase Commitment [Line Items]
Number of aircraft deliveries		20	43
B-737-700
Long-term Purchase Commitment [Line Items]
Number of aircraft retirements		17
B-737-800
Long-term Purchase Commitment [Line Items]
Number of aircraft retirements		3
B737-7
Long-term Purchase Commitment [Line Items]
Number of aircraft options exercised		7
B737-7 \| Year 2028 \| Subsequent Event
Long-term Purchase Commitment [Line Items]
Number of aircraft options exercised \| option	3
B-8
Long-term Purchase Commitment [Line Items]
Number of aircraft deliveries converted		42	61
B-7
Long-term Purchase Commitment [Line Items]
Number of aircraft deliveries converted		10	10