Debt Financing - Narrative (Details) $ in Thousands, € in Millions, $ in Millions			1 Months Ended		12 Months Ended
	Jan. 21, 2025 USD ($)	Oct. 01, 2024 USD ($)	Dec. 31, 2024 USD ($) aircraft	Aug. 31, 2024 USD ($) aircraft	Dec. 31, 2024 USD ($) facility aircraft	Feb. 13, 2025 USD ($)	Dec. 31, 2024 CAD ($) aircraft	Dec. 31, 2024 EUR (€) aircraft	May 05, 2024 USD ($)	Dec. 31, 2023 USD ($) aircraft	Nov. 30, 2023 CAD ($)
Debt Instrument [Line Items]
Outstanding balance			$ 20,389,907		$ 20,389,907					$ 19,363,460
Subsequent Event | Commercial Paper
Debt Instrument [Line Items]
Maximum commercial paper amount outstanding	$ 2,000,000
Total secured debt financing
Debt Instrument [Line Items]
Outstanding balance			$ 544,600		$ 544,600					$ 305,500
Number of aircraft pledged as collateral | aircraft			10		10		10	10		4
Collateral with net book value			$ 772,700		$ 772,700					$ 445,900
Senior unsecured securities
Debt Instrument [Line Items]
Outstanding balance			16,046,662		16,046,662					16,329,605
Senior Unsecured Notes
Debt Instrument [Line Items]
Outstanding balance										16,300,000
Medium Term Note Due 2029 - 5.100% | Medium-Term Note
Debt Instrument [Line Items]
Principal amount issued			$ 500,000		$ 500,000
Interest rate			5.10%		5.10%		5.10%	5.10%
Medium Term Note Due 2028 - 5.400% Canadian Dollar | Medium-Term Note
Debt Instrument [Line Items]
Principal amount issued							$ 400.0
Interest rate			5.40%		5.40%		5.40%	5.40%
Interest rate, effective percentage			5.95%		5.95%		5.95%	5.95%
Medium Term Note Due 2030 - 3.700% Euro | Medium-Term Note
Debt Instrument [Line Items]
Principal amount issued | €								€ 600.0
Interest rate			3.70%		3.70%		3.70%	3.70%
Interest rate, effective percentage			5.441%		5.441%		5.441%	5.441%
Medium Term Note Due 2026 - 5.30% | Medium-Term Note
Debt Instrument [Line Items]
Principal amount issued			$ 600,000		$ 600,000
Interest rate			5.30%		5.30%		5.30%	5.30%
Medium Term Note Due 2031 - 5.20% | Medium-Term Note
Debt Instrument [Line Items]
Principal amount issued			$ 600,000		$ 600,000
Interest rate			5.20%		5.20%		5.20%	5.20%
Medium Term Note Due 2028 - 5.400% Canadian Dollar, Issued November 2023 | Medium-Term Note
Debt Instrument [Line Items]
Principal amount issued											$ 500.0
Interest rate											5.40%
Revolving Credit Facility
Debt Instrument [Line Items]
Outstanding balance			$ 170,000		$ 170,000					1,100,000
Maximum borrowing capacity									$ 7,800,000
Interest margin					1.05%
Facility fee (as a percent)					0.20%
Revolving Credit Facility | Debt Instrument, Redemption, May 5, 2028 | Subsequent Event
Debt Instrument [Line Items]
Line of credit maturity amount						$ 7,500,000
Revolving Credit Facility | Debt Instrument, Redemption, May 5, 2027 | Subsequent Event
Debt Instrument [Line Items]
Line of credit maturity amount						25,000
Revolving Credit Facility | Debt Instrument, Redemption, May 5, 2026 | Subsequent Event
Debt Instrument [Line Items]
Line of credit maturity amount						210,000
Revolving Credit Facility | Debt Instrument, Redemption, May 5, 2025 | Subsequent Event
Debt Instrument [Line Items]
Line of credit maturity amount						$ 25,000
Term financings
Debt Instrument [Line Items]
Outstanding balance			3,628,600		$ 3,628,600					$ 1,628,400
2023 Term Loan | Term financings
Debt Instrument [Line Items]
Outstanding balance			1,250,000		1,250,000
Principal amount issued				$ 750,000
Interest margin				1.20%
Debt Instrument, Increase In capacity				$ 500,000
Proceeds from Lines of credit		$ 500,000
Credit spread adjustment				0.10%
Unsecured Term Loan Due 2027 | Total unsecured debt financing
Debt Instrument [Line Items]
Principal amount issued			$ 966,500		966,500
Interest margin			1.125%
Debt term			3 years
Debt instrument, amount subject to custom funding date			$ 33,500		33,500
Additional 2024 Borrowings | Total unsecured debt financing
Debt Instrument [Line Items]
Principal amount issued			$ 965,000		$ 965,000
Number of term facilities entered into during period | facility					6
Additional 2024 Borrowings | Total unsecured debt financing | Minimum
Debt Instrument [Line Items]
Interest margin					1.02%
Debt term					1 year
Additional 2024 Borrowings | Total unsecured debt financing | Maximum
Debt Instrument [Line Items]
Interest margin					1.40%
Debt term					5 years
2024 Term Loan | Line of Credit | Total secured debt financing
Debt Instrument [Line Items]
Principal amount issued				$ 267,300
Interest margin				1.35%
Number of aircraft pledged as collateral | aircraft				6
Collateral with net book value				$ 344,900