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Debt - Summary of Debt (Details) - USD ($)
Sep. 30, 2025
Apr. 30, 2025
Dec. 31, 2024
Notes Payable, Unsecured Notes and Credit Facility      
Credit Facility $ 0   $ 0
Commercial paper 235,000,000   0
Total principal outstanding 8,784,124,000   8,134,429,000
Deferred financing costs and debt discount (58,488,000)   (57,180,000)
Total $ 8,725,636,000   $ 8,077,249,000
Weighted average interest rate, debt (as a percent) 3.60%   3.50%
Unsecured notes      
Notes Payable, Unsecured Notes and Credit Facility      
Notes Payable $ 7,825,000,000    
Secured Debt      
Notes Payable, Unsecured Notes and Credit Facility      
Notes Payable 724,124,000    
Mortgage Notes Payable, Unsecured Notes, and Term Loans      
Notes Payable, Unsecured Notes and Credit Facility      
Notes Payable $ 8,549,124,000   $ 8,134,429,000
Weighted average interest rate, debt (as a percent) 3.60%   3.50%
Fixed rate unsecured notes | Unsecured notes      
Notes Payable, Unsecured Notes and Credit Facility      
Fixed rate notes $ 7,825,000,000   $ 7,400,000,000
Weighted average interest rate, debt (as a percent) 3.60%   3.40%
Fixed rate mortgage notes payable - conventional and tax-exempt | Secured Debt      
Notes Payable, Unsecured Notes and Credit Facility      
Fixed rate notes $ 332,874,000   $ 333,479,000
Weighted average interest rate, debt (as a percent) 3.90%   3.90%
Variable rate mortgage notes payable - conventional and tax-exempt | Secured Debt      
Notes Payable, Unsecured Notes and Credit Facility      
Variable rate notes $ 391,250,000   $ 400,950,000
Weighted average interest rate, debt (as a percent) 4.50%   5.20%
Credit Facility      
Notes Payable, Unsecured Notes and Credit Facility      
Commercial paper $ 235,000,000   $ 0
Weighted average interest rate, debt (as a percent) 0.00%   0.00%
Current interest rate (as a percent) 4.95%    
Commercial paper      
Notes Payable, Unsecured Notes and Credit Facility      
Weighted average interest rate, debt (as a percent) 4.40%   0.00%
Variable Rate Unsecured Term Loan $550 Million | Unsecured notes      
Notes Payable, Unsecured Notes and Credit Facility      
Notes Payable $ 550,000,000    
Assumption of fixed rate mortgage loan $ 550,000,000 $ 450,000,000  
Current interest rate (as a percent) 4.44%