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Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
CARRYING VALUE    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes and bonds payable $ 4,994.9 $ 5,351.8
Real estate notes receivable 173.6 99.6
FAIR VALUE    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes and bonds payable 4,872.7 5,149.6
Real estate notes receivable $ 172.5 $ 99.6