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Debt Financing - Narrative (Details)		1 Months Ended	9 Months Ended
	Jan. 21, 2025 USD ($)	Dec. 31, 2024 USD ($) aircraft	Sep. 30, 2025 USD ($) facility aircraft	Sep. 30, 2024 USD ($)	Nov. 03, 2025 USD ($)	May 30, 2025 USD ($)	May 05, 2025 USD ($)	Apr. 30, 2025 USD ($)
Debt Instrument [Line Items]
Composite interest rate		4.14%	4.29%
Debt outstanding		$ 20,389,907,000	$ 20,340,227,000
Proceeds from debt financings			683,074,000	$ 3,541,706,000
Senior unsecured securities
Debt Instrument [Line Items]
Debt outstanding		16,046,662,000	13,850,307,000
Proceeds from debt financings			0
Revolving Credit Facility
Debt Instrument [Line Items]
Debt outstanding		170,000,000	$ 0
Maximum borrowing capacity							$ 8,200,000,000
Interest margin			1.05%
Facility fee			0.20%
Increase in maximum borrowing capacity						$ 250,000,000
Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Line of credit, noncurrent					$ 8,400,000,000
Revolving Credit Facility | Subsequent Event | Mature May 5, 2029
Debt Instrument [Line Items]
Line of credit, noncurrent					8,000,000,000
Revolving Credit Facility | Subsequent Event | Mature May 5, 2028
Debt Instrument [Line Items]
Line of credit, noncurrent					125,000,000
Revolving Credit Facility | Subsequent Event | Mature May 5, 2027
Debt Instrument [Line Items]
Line of credit, noncurrent					25,000,000
Revolving Credit Facility | Subsequent Event | Mature May 5, 2026
Debt Instrument [Line Items]
Line of credit, noncurrent					$ 210,000,000
Tranche B
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 250,000,000
Other revolving credit facilities
Debt Instrument [Line Items]
Debt outstanding		$ 0	$ 600,000,000
Number of unsecured revolving credit facilities | facility			2
One-Month Term SOFR 1.00%
Debt Instrument [Line Items]
Debt outstanding			$ 300,000,000
Interest margin			1.00%
One-Month Term SOFR 1.05%
Debt Instrument [Line Items]
Debt outstanding			$ 300,000,000
Interest margin			1.05%
Unsecured Term Loan Due December 2027 | Total unsecured debt financing
Debt Instrument [Line Items]
Interest margin		1.125%
Aggregate principal amount		$ 966,500,000
Debt instrument, term		3 years
Additional commitments								$ 33,500,000
Additional 2025 Borrowings | Total unsecured debt financing
Debt Instrument [Line Items]
Aggregate principal amount			$ 550,000,000
Number of term facilities entered into during period | facility			3
Credit spread adjustment			0.10%
Additional 2025 Borrowings | Total unsecured debt financing | Minimum
Debt Instrument [Line Items]
Interest margin			1.00%
Debt instrument, term			1 year
Additional 2025 Borrowings | Total unsecured debt financing | Maximum
Debt Instrument [Line Items]
Interest margin			1.15%
Debt instrument, term			2 years
Term financings
Debt Instrument [Line Items]
Debt outstanding		$ 3,628,600,000	$ 3,870,000,000
Secured Debt
Debt Instrument [Line Items]
Debt outstanding		$ 544,645,000	$ 511,920,000
Number of aircraft pledged as collateral | aircraft		10	10
Net book value of aircraft pledged as collateral		$ 772,700,000	$ 736,200,000
Commercial paper
Debt Instrument [Line Items]
Debt outstanding		$ 0	$ 1,508,000,000
Maximum commercial paper amount outstanding	$ 2,000,000,000
Weighted average interest rate			4.61%
Weighted average maturity			1 month

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