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Investments In Unconsolidated Subsidiaries - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule of Equity Method Investments [Line Items] |  |  |
Revenue | $ 31,949.0 | $ 30,828.0 | $ 27,746.0
Additional investment | $ 0.0 | 101.0 | 0.0
Ownership Percentage | Minimum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investments in unconsolidated subsidiaries, variations in ownership percentage | 1.00% |  |
Ownership Percentage | Maximum |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investments in unconsolidated subsidiaries, variations in ownership percentage | 50.00% |  |
Investment management | Real Estate Investments | Related Party |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Revenue | $ 278.8 | 268.9 | 213.5
Related party receivable | 83.2 | 73.2 |
Development and Construction Management Revenues | Related Party |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Revenue | 165.0 | 147.8 | $ 104.3
Related party receivable | $ 30.4 | $ 21.1 |

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