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Transactions with Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity Interests in Real Estate Ventures [Member]
Related Party Transaction [Line Items]
Revenues from affiliates	$ 686.4	$ 723.3	$ 516.4
Receivables due from affiliates	122.4	152.9
Employees [Member]
Related Party Transaction [Line Items]
Receivables due from affiliates	377.2	289.6
Employees [Member] | Loans related to co-investments [Member]
Related Party Transaction [Line Items]
Receivables due from affiliates	54.0	16.9
Employees [Member] | Travel, relocation and other miscellaneous advances [Member]
Related Party Transaction [Line Items]
Receivables due from affiliates	$ 323.2	$ 272.7

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