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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 |  |  |  |  |  |  |

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- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481573/470-10-45-13 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481573/470-10-45-14 + Details
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