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Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
CARRYING VALUE    
Derivative [Line Items]    
Notes and bonds payable $ 4,957.8 $ 4,994.9
Real estate notes receivable 121.7 173.6
FAIR VALUE    
Derivative [Line Items]    
Notes and bonds payable 4,909.5 4,872.7
Real estate notes receivable $ 118.2 $ 172.5