Flight Equipment Held for Sale - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) aircraft	Dec. 31, 2023 USD ($) aircraft
Disposal Group, Held-for-sale, Not Discontinued Operations | Thirty Aircrafts
Flight Equipment Held for Sale
Number of aircraft	30
Carrying value of assets held for sale | $	$ 951.2
Disposal Group, Held-for-sale, Not Discontinued Operations | Nine Aircrafts
Flight Equipment Held for Sale
Number of aircraft	9
Purchase deposits | $	$ 352.3
Disposal Group, Held-for-sale, Not Discontinued Operations | Fifty-Six Aircrafts
Flight Equipment Held for Sale
Disposal group, including discontinued operation, number of aircrafts transferred	55
Disposal Group, Held-for-sale, Not Discontinued Operations | Fourteen Aircrafts
Flight Equipment Held for Sale
Number of aircraft		14
Carrying value of assets held for sale | $		$ 605.1
Disposal Group, Held-for-sale, Not Discontinued Operations | Six Aircrafts
Flight Equipment Held for Sale
Number of aircraft		6
Purchase deposits | $		$ 305.8
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Thirty-Nine Aircrafts
Flight Equipment Held for Sale
Number of aircraft	39