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Fair Value of Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2023
Fair Value Disclosures [Abstract] |
Schedule of Fair Value And Carrying Values For Notes And Bonds Payable, Real Estate Notes Receivable, And Notes Receivable | The table below details the fair values and carrying values for notes and bonds payable and real estate notes receivable at September 30, 2023 and December 31, 2022.
| September 30, 2023 | December 31, 2022 |
Dollars in millions | CARRYING VALUE | FAIR VALUE | CARRYING VALUE | FAIR VALUE |
Notes and bonds payable 1 | $ | 5,227.4 |  | $ | 4,941.2 |  | $ | 5,351.8 |  | $ | 5,149.6 |  |
Real estate notes receivable 1 | $ | 155.0 |  | $ | 151.7 |  | $ | 99.6 |  | $ | 99.6 |  |
1 Level 2 – model-derived valuations in which significant inputs and significant value drivers are observable in active markets.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-11 + Details
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