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Fair Value Measurements (Fair Value Of Notes Payable) (Details) - USD ($) | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Carrying Value | [1] | $ 4,250,500,000 |  | $ 3,900,800,000
Fixed rate notes payable |  |  |  |
Carrying Value |  | 3,349,700,000 |  | 2,766,900,000
Estimated Fair Value |  | 3,168,100,000 |  | 2,629,600,000
Floating rate notes payable (1) |  |  |  |
Carrying Value |  | 900,800,000 | [2] | 1,100,000,000
Estimated Fair Value | [2] | $ 903,900,000 |  | 1,140,900,000
Floating Rate Notes Payable CV |  |  |  |
Carrying Value | [2] |  |  | $ 1,133,900,000
[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 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.

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