Commitments and Contingencies - Firm Commitments and Options to Purchase Aircraft (Details)	Dec. 31, 2023 aircraft_commitment aircraft
787
Long-term Purchase Commitment [Line Items]
Number of Firm Commitments | aircraft_commitment	150
Number Of Aircrafts Expected To Take Delivery [Abstract]
2024	8
2025	18
After 2025	124
2024	7
2025	18
After 2025	125
737 MAX 8
Long-term Purchase Commitment [Line Items]
Number of Firm Commitments | aircraft_commitment	43
Number Of Aircrafts Expected To Take Delivery [Abstract]
2024	43
2025	0
After 2025	0
2024	37
2025	6
After 2025	0
737 MAX 9
Long-term Purchase Commitment [Line Items]
Number of Firm Commitments | aircraft_commitment	34
Number Of Aircrafts Expected To Take Delivery [Abstract]
2024	34
2025	0
After 2025	0
2024	19
2025	15
After 2025	0
737 MAX 10
Long-term Purchase Commitment [Line Items]
Number of Firm Commitments | aircraft_commitment	277
Number Of Aircrafts Expected To Take Delivery [Abstract]
2024	80
2025	71
After 2025	126
2024	0
A321neo
Long-term Purchase Commitment [Line Items]
Number of Firm Commitments | aircraft_commitment	126
Number Of Aircrafts Expected To Take Delivery [Abstract]
2024	26
2025	38
After 2025	62
2024	25
2025	24
After 2025	77
A321XLR
Long-term Purchase Commitment [Line Items]
Number of Firm Commitments | aircraft_commitment	50
Number Of Aircrafts Expected To Take Delivery [Abstract]
2024	0
2025	8
After 2025	42
2024	0
2025	1
After 2025	49
A350
Long-term Purchase Commitment [Line Items]
Number of Firm Commitments | aircraft_commitment	45
Number Of Aircrafts Expected To Take Delivery [Abstract]
2024	0
2025	0
After 2025	45
2024	0
2025	0
After 2025	45