Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We are a party to a number of pending or threatened lawsuits arising out of, or incident to, our ordinary course of business. We believe that any losses in excess of the amounts accrued therefore as liabilities on our consolidated financial statements are unlikely to be significant, but litigation is inherently uncertain and there is the potential for a material adverse effect on our consolidated financial statements if one or more matters are resolved in a particular period in an amount materially in excess of what we anticipated. In January 2008, CBRE MCI, a wholly-owned subsidiary of CBRE Capital Markets, entered into an agreement with Fannie Mae under Fannie Mae’s Delegated Underwriting and Servicing Lender Program (DUS Program), to provide financing for multifamily housing with five or more units. Under the DUS Program, CBRE MCI originates, underwrites, closes and services loans without prior approval by Fannie Mae, and typically, is subject to sharing up to one-third of any losses on loans originated under the DUS Program. CBRE MCI has funded loans with unpaid principal balances of $37.4 billion at September 30, 2022, of which $33.5 billion is subject to such loss sharing arrangements. CBRE MCI, under its agreement with Fannie Mae, must post cash reserves or other acceptable collateral under formulas established by Fannie Mae to provide for sufficient capital in the event losses occur. As of September 30, 2022 and December 31, 2021, CBRE MCI had $108.0 million and $100.0 million, respectively, of letters of credit under this reserve arrangement and had recorded a liability of approximately $62.4 million and $64.0 million, respectively, for its loan loss guarantee obligation under such arrangement. Fannie Mae’s recourse under the DUS Program is limited to the assets of CBRE MCI, which assets totaled approximately $881.3 million (including $424.1 million of warehouse receivables, a substantial majority of which are pledged against warehouse lines of credit and are therefore not available to Fannie Mae) at September 30, 2022. CBRE Capital Markets participates in Freddie Mac’s Multifamily Small Balance Loan (SBL) Program. Under the SBL program, CBRE Capital Markets has certain repurchase and loss reimbursement obligations. We could potentially be obligated to repurchase any SBL loan originated by CBRE Capital Markets that remains in default for 120 days following the forbearance period, if the default occurred during the first 12 months after origination and such loan had not been earlier securitized. In addition, CBRE Capital Markets may be responsible for a loss not to exceed 10% of the original principal amount of any SBL loan that is not securitized and goes into default after the 12-month repurchase period. CBRE Capital Markets must post a cash reserve or other acceptable collateral to provide for sufficient capital in the event the obligations are triggered. As of both September 30, 2022 and December 31, 2021, CBRE Capital Markets had posted a $5.0 million letter of credit under this reserve arrangement. We had outstanding letters of credit totaling $177.3 million as of September 30, 2022, excluding letters of credit for which we have outstanding liabilities already accrued on our consolidated balance sheet related to our subsidiaries’ outstanding reserves for claims under certain insurance programs as well as letters of credit related to operating leases. The CBRE Capital Markets letters of credit totaling $113.0 million as of September 30, 2022 referred to in the preceding paragraphs represented the majority of the $177.3 million outstanding letters of credit as of such date. The remaining letters of credit are primarily executed by us in the ordinary course of business and expire at the end of each of the respective agreements. We had guarantees totaling $60.4 million as of September 30, 2022, excluding guarantees related to pension liabilities, consolidated indebtedness and other obligations for which we have outstanding liabilities already accrued on our consolidated balance sheet, and excluding guarantees related to operating leases. The $60.4 million primarily represents guarantees executed by us in the ordinary course of business, including various guarantees of management and vendor contracts in our operations overseas, which expire at the end of each of the respective agreements. In addition, as of September 30, 2022, we had issued numerous non-recourse carveout, completion and budget guarantees relating to development projects for the benefit of third parties. These guarantees are commonplace in our industry and are made by us in the ordinary course of our Real Estate Investments business. Non-recourse carveout guarantees generally require that our project-entity borrower not commit specified improper acts, with us potentially liable for all or a portion of such entity’s indebtedness or other damages suffered by the lender if those acts occur. Completion and budget guarantees generally require us to complete construction of the relevant project within a specified timeframe and/or within a specified budget, with us potentially being liable for costs to complete in excess of such timeframe or budget. While there can be no assurance, we do not expect to incur any material losses under these guarantees. An important part of the strategy for our Real Estate Investments business involves investing our capital in certain real estate investments with our clients. These co-investments generally total up to 2.0% of the equity in a particular fund. As of September 30, 2022, we had aggregate commitments of $110.5 million to fund these future co-investments. Additionally, an important part of our Real Estate Investments business strategy is selective investment in real estate projects. We invest on our own account or co-invest with our clients as a principal in unconsolidated real estate subsidiaries. As of September 30, 2022, we had committed to fund $82.7 million of additional capital to unconsolidated subsidiaries and $138.3 million to real estate projects that were consolidated in our financial statements. On April 28, 2022, Telford Homes signed the UK government’s non-binding Fire Safety Pledge (the Pledge), which states that subject to entering into mutually acceptable definitive agreements with the UK government, Telford Homes will (1) take responsibility for performing or funding self-remediation works relating to certain life-critical fire-safety issues on all Telford Homes-constructed buildings of 11 meters in height or greater in England and (2) withdraw Telford Homes-constructed buildings from, or reimburse the government for, Telford Homes-constructed buildings covered in the government-sponsored Building Safety Fund (BSF) and Aluminum Composite Material Funds. CBRE believes there is a potential risk of loss attributable to past events, including retroactive changes in building fire-safety regulations, under the Pledge, and also under existing contracts and / or the new Building Safety Act. The estimated potential costs for buildings within the required scope of the remediation are subjective, highly complex and dependent on a number of variables outside of Telford Homes’ control. These include, but are not limited to, the time required for the remediation to be completed, the size and number of buildings that may require remediation, cost of construction or remediation materials, potential discoveries made during remediation that could necessitate incremental work, investigation costs, potential business disruption costs, potential changes to or new regulations and regulatory approval. As a result of signing the Pledge and the potential for CBRE to pay for remediation under any definitive agreements that may negotiated by the parties under the Pledge, CBRE recorded non-cash charges of $9.5 million and $47.0 million during the three months and nine months ended September 30, 2022, respectively. This potential liability primarily represents adjusted amounts the UK government has already paid or quantified through the BSF for remediation of Telford-constructed buildings. Given the significant unknowns and multiple variables described above, CBRE is not able to estimate a reasonable range of costs in excess of the amount recorded as of September 30, 2022. CBRE continues to assess its potential liability, including likelihood of payment, and believes it could be material to the company.