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v3.20.4

Notes Payable (Summary Of Indebtedness) (Details) - USD ($) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Oct. 01, 2020 | Dec. 31, 2019 | Oct. 01, 2019 | Dec. 31, 2018
Unsecured Debt |  | $ 3,166,625,000 |  | $ 2,524,099,000 |  |
Total notes payable | [1] | 3,166,600,000 |  | 2,524,100,000 |  |
Long-term Debt |  | 3,166,600,000 |  |  |  |
Commercial Banks [Member] |  |  |  |  |  |
Unsecured Debt |  | 39,700,000 |  | 143,700,000 |  |
Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 3,126,900,000 |  | 2,380,400,000 |  |
2.70% Term loan Due 2022 | Commercial Banks [Member] |  |  |  |  |  |
Unsecured Debt |  |  | $ 40,000,000.0 | $ 99,700,000 |  |
Notes payable, effective interest rate |  | 1.15% |  | 2.70% |  |
4.78% Notes Due 2021 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  |  |  |  | $ 250,000,000 |
Notes payable, effective interest rate |  |  |  |  | 4.78% |
3.15% Notes Due 2022 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 348,600,000 |  | $ 348,000,000.0 |  |
Notes payable, effective interest rate |  | 3.15% |  | 3.15% |  |
Debt Instrument, Maturity Date |  | Dec. 15, 2022 |  |  |  |
5.07% Notes Due 2023 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 248,900,000 |  | $ 248,400,000 |  |
Notes payable, effective interest rate |  | 5.07% |  | 5.07% |  |
Debt Instrument, Maturity Date |  | Jun. 15, 2023 |  |  |  |
4.36% Notes Due 2024 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 249,200,000 |  | $ 249,000,000.0 |  |
Notes payable, effective interest rate |  | 4.36% |  | 4.36% |  |
Debt Instrument, Maturity Date |  | Jan. 15, 2024 |  |  |  |
3.68% Notes Due 2024 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 248,400,000 |  | $ 248,000,000.0 |  |
Notes payable, effective interest rate |  | 3.68% |  | 3.68% |  |
Debt Instrument, Maturity Date |  | Sep. 15, 2024 |  |  |  |
3.74% Notes Due 2028 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 397,300,000 |  | $ 396,700,000 |  |
Notes payable, effective interest rate |  |  |  | 3.74% |  | 3.74%
Debt Instrument, Maturity Date |  | Oct. 15, 2028 |  |  |  |
3.67% Notes due 2029 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt | [2] | $ 594,300,000 |  | $ 593,700,000 |  |
Notes payable, effective interest rate |  |  |  | 3.67% |  |
Debt Instrument, Maturity Date |  | Jul. 01, 2029 |  |  |  |
3.41% Notes due 2049 | Senior Unsecured Notes [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 296,700,000 |  | $ 296,600,000 |  |
Notes payable, effective interest rate |  | 3.41% |  | 3.41% |  |
Debt Instrument, Maturity Date |  | Nov. 01, 2049 |  |  |  |
Secured Notes 4.38% Fixed Rate Mortgage Note Due 2045 [Member] | Secured Debt [Member] |  |  |  |  |  |
Secured notes payable |  |  |  |  | $ 45,300,000 |
Notes payable, effective interest rate |  |  |  |  | 4.38% |
Unsecured Credit Facility [Member] | Commercial Banks [Member] |  |  |  |  |  |
Unsecured Debt |  | $ 0 |  | $ 44,000,000.0 |  |
[1] | Unamortized debt discounts and debt issuance costs of $23.4 million and $19.9 million are included in senior unsecured notes payable as of December 31, 2020 and 2019, respectively.
[2] | The 2029 Notes have an effective annual interest rate of approximately 3.84% through June 2026, which includes the effect of a settled forward interest rate swap, and approximately 3.28% thereafter, for an all-in average effective rate of approximately 3.67%.

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