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v3.26.1

Notes Payable (Narrative) (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2026 USD ($) yr | Mar. 31, 2025 USD ($) | Feb. 19, 2026 USD ($) | Dec. 31, 2025 USD ($)
Notes Payable | [1] | $ 4,250,500,000 |  |  |  | $ 3,900,800,000
Unamortized debt discounts and debt issuance costs |  | 17,300,000 |  |  |  | 10,100,000
Available amount under unsecured credit facility |  | 1,200,000,000 |  |  |  |
Repayment of notes payable |  | $ 11,950,000 |  | $ 0 |  |
Weighted Average Interest Rate | [2],[3] | 4.10% |  |  |  |
Weighted average maturity of indebtedness (including unsecured line of credit) (in years) | yr |  | 5.4 |  |  |  |
Secured notes payable |  | $ 318,708,000 |  |  |  | 330,597,000
Unsecured notes payable |  | 3,931,761,000 |  |  |  | 3,570,193,000
Commercial Paper |  | 600,000,000 |  |  |  |
Letter Of Credit [Member] |  |  |  |  |  |
Maximum Ability to Issue Letters of Credit Under Unsecured Credit Facility |  | 50,000,000 |  |  |  |
Commercial Banks [Member] |  |  |  |  |  |
Unsecured notes payable |  | 398,700,000 |  |  |  | 629,900,000
Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured notes payable |  | 3,533,100,000 |  |  |  | 2,940,300,000
Secured Debt |  |  |  |  |  |
Secured notes payable |  | $ 318,700,000 |  |  |  | 330,600,000
5.14% Unsecured revolving credit facility |  |  |  |  |  |
Terms Of Bid Rate Loans |  | 180 days |  |  |  |
Value not exceeding the amount available under the line of credit |  | $ 600,000,000 |  |  |  |
Line of Credit Facility, Increase (Decrease), Net |  | 300,000,000.0 |  |  |  |
5.14% Unsecured revolving credit facility | September 2022 Credit Agreement |  |  |  |  |  |
Maximum borrowing capacity under unsecured credit facility |  | 1,200,000,000 |  |  |  |
Floating rate notes payable [Member] |  |  |  |  |  |
Notes Payable |  | $ 900,800,000 | [4] |  |  | $ 1,100,000,000
Weighted Average Interest Rate |  | 4.50% |  |  |  | 4.40%
3.85% Commercial Paper Program |  |  |  |  |  |
Debt Instrument, Term |  | 30 days |  |  |  |
3.85% Commercial Paper Program | Commercial Banks [Member] |  |  |  |  |  |
Weighted Average Interest Rate |  | 3.85% |  |  |  | 3.84%
Unsecured notes payable |  | $ 358,800,000 |  |  |  | $ 590,000,000.0
4.97% Notes, due 2026 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Debt Instrument, Maturity Date |  | Nov. 03, 2026 |  |  |  |
Notes payable, effective interest rate |  | 4.97% |  |  |  |
Unsecured notes payable | [5] | $ 502,100,000 |  |  |  | 504,000,000.0
Hedged Asset, Fair Value Hedge |  | (2,700,000) |  |  |  | $ (4,900,000)
Four Point Zero Nine Percentage Notes Due 2036 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 4.90% |
Debt Instrument, Face Amount |  |  |  |  | $ 600,000,000.0 |
Proceeds from Issuance of Debt |  | $ 594,000,000.0 |  |  |  |
Debt Instrument, Interest Rate During Period |  | 4.91% |  |  |  |
Discounted Notes Payable Face Amount |  | 99.94% |  |  |  |
[1] | Balances are decreased by unamortized debt discounts, debt issuance costs, and fair market value adjustments, net of $17.3 million and $10.1 million as of March 31, 2026 and December 31, 2025, respectively.
[2] | Includes all available extension options.
[3] | Includes the effects of the applicable settled derivatives.
[4] | Includes the senior unsecured notes payable and a term loan due in 2026, and the commercial paper notes at March 31, 2026 and December 31, 2025.
[5] | Balances are increased by $2.7 million and $4.9 million for fair value adjustments due to changes in benchmark interest rates related to these notes as of March 31, 2026 and December 31, 2025, respectively. See Note 7. "Derivative Financial Instruments and Hedging Activities," for further discussion.

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