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Fair Value of Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Schedule of fair value and carrying values for notes and bonds payable, mortgage notes receivable and notes receivable
The table below details the fair value and carrying values for our other financial instruments as of December 31, 2022 and 2021. 
 December 31, 2022December 31, 2021
Dollars in millionsCARRYING VALUEFAIR VALUECARRYING VALUEFAIR VALUE
Notes and bonds payable 1, 2
$5,351.8 $5,149.6 $1,801.3 $1,797.4 
Real estate notes receivable 1
$99.6 $99.6 $— $— 
1Level 2 – model-derived valuations in which significant inputs and significant value drivers are observable in active markets.
2Fair value for senior notes includes accrued interest as of December 31, 2022.