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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount of assets pledged to secure a debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Debt Financing - Narrative (Details) $ in Thousands, € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) aircraft	Aug. 01, 2024 USD ($)	Jun. 30, 2024 CAD ($) aircraft	Jun. 30, 2024 EUR (€) aircraft	May 05, 2024 USD ($)	Dec. 31, 2023 USD ($) aircraft	Nov. 30, 2023 CAD ($)
Debt Instrument [Line Items]
Outstanding balance	$ 19,878,149					$ 19,363,460
Senior unsecured securities
Debt Instrument [Line Items]
Outstanding balance	17,493,142					16,329,605
Medium Term Note Due 2029 - 5.100% \| Medium-Term Notes
Debt Instrument [Line Items]
Principal amount issued	$ 500,000
Interest rate	5.10%		5.10%	5.10%
Medium Term Note Due 2026 - 5.30% \| Medium-Term Notes
Debt Instrument [Line Items]
Principal amount issued	$ 600,000
Interest rate	5.30%		5.30%	5.30%
Medium Term Note Due 2031 - 5.20% \| Medium-Term Notes
Debt Instrument [Line Items]
Principal amount issued	$ 600,000
Interest rate	5.20%		5.20%	5.20%
2024 C$ notes \| Medium-Term Notes
Debt Instrument [Line Items]
Principal amount issued			$ 400.0
Interest rate	5.40%		5.40%	5.40%
Effective rate	5.95%		5.95%	5.95%
2024 € notes \| Medium-Term Notes
Debt Instrument [Line Items]
Principal amount issued \| €				€ 600.0
Interest rate	3.70%		3.70%	3.70%
Effective rate	5.441%		5.441%	5.441%
Medium Term Note Due 2028 - 5.400% Canadian Dollar, Issued November 2023 \| Medium-Term Notes
Debt Instrument [Line Items]
Principal amount issued							$ 500.0
Interest rate							5.40%
Revolving credit facility
Debt Instrument [Line Items]
Outstanding balance	$ 90,000					1,100,000
Maximum borrowing capacity					$ 7,800,000
Interest margin	1.05%
Facility fee	0.20%
Revolving credit facility \| Subsequent Event \| Mature May 5, 2028
Debt Instrument [Line Items]
Line of credit, noncurrent		$ 7,500,000
Revolving credit facility \| Subsequent Event \| Mature May 5, 2027
Debt Instrument [Line Items]
Line of credit, noncurrent		25,000
Revolving credit facility \| Subsequent Event \| Mature May 5, 2026
Debt Instrument [Line Items]
Line of credit, noncurrent		210,000
Revolving credit facility \| Subsequent Event \| Mature May 5, 2025
Debt Instrument [Line Items]
Line of credit, noncurrent		$ 25,000
Total secured debt financing
Debt Instrument [Line Items]
Outstanding balance	$ 291,507					$ 305,455
Number of aircraft pledged as collateral \| aircraft	4		4	4		4
Net book value of aircraft pledged as collateral	$ 436,900					$ 445,900