Debt Financing - Narrative (Details)			1 Months Ended	12 Months Ended
	Feb. 12, 2026 USD ($)	Jan. 21, 2025 USD ($)	Dec. 31, 2024 USD ($) aircraft	Dec. 31, 2025 USD ($) facility aircraft	May 31, 2025 USD ($)	May 05, 2025 USD ($)	Apr. 30, 2025 USD ($)
Debt Instrument [Line Items]
Composite interest rate			4.14%	4.15%
Total debt financing			$ 20,389,907,000	$ 19,862,344,000
Senior unsecured securities
Debt Instrument [Line Items]
Total debt financing			$ 16,046,662,000	$ 13,860,558,000
Senior unsecured securities | Minimum
Debt Instrument [Line Items]
Remaining term				1 month
Bearing fixed interest, percent			1.875%	1.875%
Senior unsecured securities | Maximum
Debt Instrument [Line Items]
Remaining term				6 years
Bearing fixed interest, percent			5.95%	5.95%
Revolving Credit Facility
Debt Instrument [Line Items]
Total debt financing			$ 170,000,000	$ 0
Maximum borrowing capacity						$ 8,200,000,000
Interest margin				1.05%
Facility fee (as a percent)				0.20%
Increase in maximum borrowing capacity					$ 250,000,000
Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Total debt financing	$ 750,000,000
Line of credit maturity amount	8,400,000,000
Revolving Credit Facility | Subsequent Event | Debt Instrument, Redemption, May 5, 2029
Debt Instrument [Line Items]
Line of credit maturity amount	8,000,000,000
Revolving Credit Facility | Subsequent Event | Debt Instrument, Redemption, May 5, 2028
Debt Instrument [Line Items]
Line of credit maturity amount	125,000,000
Revolving Credit Facility | Subsequent Event | Debt Instrument, Redemption, May 5, 2027
Debt Instrument [Line Items]
Line of credit maturity amount	25,000,000
Revolving Credit Facility | Subsequent Event | Debt Instrument, Redemption, May 5, 2026
Debt Instrument [Line Items]
Line of credit maturity amount	210,000,000
Revolving Credit Facility, Tranche B
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 250,000,000
Other revolving credit facilities
Debt Instrument [Line Items]
Total debt financing			0	$ 300,000,000
Other revolving credit facilities | Subsequent Event
Debt Instrument [Line Items]
Total debt financing	$ 750,000,000
Other revolving credit facilities | Minimum
Debt Instrument [Line Items]
Interest margin				1.00%
Other revolving credit facilities | Minimum | Subsequent Event
Debt Instrument [Line Items]
Interest margin	1.00%
Other revolving credit facilities | Maximum
Debt Instrument [Line Items]
Interest margin				1.05%
Other revolving credit facilities | Maximum | Subsequent Event
Debt Instrument [Line Items]
Interest margin	1.05%
Term financings
Debt Instrument [Line Items]
Total debt financing			$ 3,628,600,000	$ 3,846,800,000
Unsecured Term Loan Due 2027 | Total unsecured debt financing
Debt Instrument [Line Items]
Interest margin			1.125%
Aggregate principal amount			$ 966,500,000
Debt term			3 years
Debt instrument, amount subject to custom funding date							$ 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 | Minimum | Total unsecured debt financing
Debt Instrument [Line Items]
Interest margin				1.00%
Debt term				1 year
Additional 2025 Borrowings | Maximum | Total unsecured debt financing
Debt Instrument [Line Items]
Interest margin				1.15%
Debt term				2 years
Secured Debt
Debt Instrument [Line Items]
Total debt financing			$ 544,645,000	$ 493,586,000
Number of aircraft pledged as collateral | aircraft			10	10
Collateral with net book value			$ 772,700,000	$ 728,600,000
Commercial paper
Debt Instrument [Line Items]
Total debt financing			$ 0	$ 1,361,400,000
Maximum commercial paper amount outstanding		$ 2,000,000,000
Weighted average interest rate				4.26%
Weighted average maturity				1 month
Commercial paper | Subsequent Event
Debt Instrument [Line Items]
Total debt financing	$ 1,600,000,000
Weighted average interest rate	4.15%
Weighted average maturity	1 month