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Commitments and Contingencies (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Funded loans unpaid principal	$ 35,800.0
Letters of credit outstanding	169.6
Accrued loan loss	64.6	$ 64.0
Assets available for recourse	764.2
Guarantees total	$ 46.4
Co-investments typically range	2.00%
Commitments to investment in future real estate investment	$ 115.2
Commitments to investment in unconsolidated real estate subsidiary	49.7
Commitments to investments in consolidated projects	100.9
Forbearance Of Loans, CARES Act
Loss Contingencies [Line Items]
Advances for principal and interest	9.3
Warehouse Receivable
Loss Contingencies [Line Items]
Warehouse receivables	326.7
Funded loans subject to loss sharing arrangements
Loss Contingencies [Line Items]
Funded loans unpaid principal	31,800.0
Funded loans not subject to loss sharing arrangements
Loss Contingencies [Line Items]
Letters of credit outstanding	100.0
SBL Program
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 5.0	$ 5.0
Percentage of maximum original principal amount loan loss	10.00%
CBRE Capital Markets
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 105.0

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- Definition

Advances for principal and interest

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Assets available for recourse under the Fannie Mae DUS lender program.

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- Definition

The reporting entity's aggregate commitments to fund future co-investments with its clients in certain real estate investments.

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The reporting entity's aggregate commitments to fund additional capital to certain unconsolidated real estate subsidiaries.

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Principal amount outstanding as of the balance-sheet date of loans funded as part of a loss sharing arrangement with a third party.

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Maximum potential amount of future payments (undiscounted) the reporting entity could be required to make excluding (1) those for which the reporting entity has an outstanding liability already accrued on its consolidated statement of financial position and (2) completion and budget guarantees relating to the reporting entity's Development Services segment.

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The reporting entity's estimate of loss sharing reserves on loans originated that are subject to a loss sharing arrangement with a third party.

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Maximum original principal amount loan loss percentage.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount, before allowance for credit loss, of financing receivable.

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