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Warehouse Receivables & Warehouse Lines of Credit - Summary of Warehouse Lines of Credit in Place (Detail) | 3 Months Ended |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2021 USD ($) | Jan. 18, 2021 USD ($) | Dec. 31, 2020 USD ($) | Nov. 02, 2020 USD ($) | Oct. 19, 2020 USD ($) | Sep. 22, 2020 USD ($) | Sep. 21, 2020 USD ($) | Aug. 04, 2020 USD ($) | Jul. 01, 2020 USD ($) | Jun. 10, 2020 USD ($) | Jun. 28, 2019 USD ($) borrowing
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Carrying Value | $ 675,473,000 |  | $ 1,383,964,000 |  |  |  |  |  |  |  |
Warehouse Agreement Borrowings |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size | 3,000,000,000 |  | 3,500,000,000 |  |  |  |  |  |  |  |
Carrying Value | 675,473,000 |  | 1,383,964,000 |  |  |  |  |  |  |  |
Warehouse Agreement Borrowings | JP Morgan | Pricing at daily floating rate LIBOR plus 1.30%, maturing October 19, 2020 |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size | 985,000,000 | $ 985,000,000.0 | 1,585,000,000 |  | $ 1,585,000,000.0 |  |  |  |  |  |
Carrying Value | $ 370,054,000 |  | 561,726,000 |  |  |  |  |  |  |  |
Line of credit over LIBOR rate | 1.60% |  |  |  |  |  |  |  |  |  |
Warehouse Agreement Borrowings | JP Morgan | Pricing at daily floating rate LIBOR plus 2.75%, maturing October 19, 2020 |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size | $ 15,000,000 |  | 15,000,000 |  |  |  |  |  |  |  |
Carrying Value | $ 899,000 |  | 0 |  |  |  |  |  |  |  |
Line of credit over LIBOR rate | 2.75% |  |  |  |  |  |  |  |  |  |
Warehouse Agreement Borrowings | Fannie Mae ASAP Program | Pricing at daily one-month LIBOR plus 1.35%, with a LIBOR floor of 0.35%, Cancelable anytime |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size | $ 650,000,000 |  | 450,000,000 |  |  |  |  |  |  |  |
Carrying Value | $ 85,530,000 |  | 132,692,000 |  |  |  |  |  |  |  |
Line of credit over LIBOR rate | 1.45% |  |  |  |  |  |  |  |  |  |
Line of credit, LIBOR floor rate | 0.25% |  |  |  |  |  |  |  |  |  |
Warehouse Agreement Borrowings | TD Bank | Pricing at daily floating rate LIBOR plus 1.15%, maturing June 30, 2021 |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size | $ 800,000,000 |  | 800,000,000 |  |  |  |  |  | $ 400,000,000.0 |  |
Carrying Value | $ 94,164,000 |  | 401,849,000 |  |  |  |  |  |  |  |
Line of credit over LIBOR rate | 1.15% |  |  |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  |  | $ 400,000,000.0 |  |  |  |
Warehouse Agreement Borrowings | Bank of America (BofA) | LIBOR daily floating rate plus 1.50% on general facility and LIBOR daily floating rate plus 1.75% on separate sublimit borrowing, maturing on May 26, 2021 |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size | $ 350,000,000 |  | 350,000,000 |  |  |  |  |  |  | $ 350,000,000.0 |
Carrying Value | 89,949,000 |  | 175,862,000 |  |  |  |  |  |  |  |
Warehouse Agreement Borrowings | Bank of America (BofA) | LIBOR daily floating rate plus 1.50% on general facility and LIBOR daily floating rate plus 1.75% on separate sublimit borrowing, maturing on May 26, 2021 | Sublimit Borrowing Agreement |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size |  |  |  |  |  |  |  |  |  | $ 100,000,000.0 |
Warehouse Agreement Borrowings | MUFG Union Bank, N.A. (Union Bank) | Pricing at daily floating rate LIBOR plus 1.20%, maturing June 28, 2020 |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum Facility Size | 200,000,000 |  | 300,000,000 | $ 650,000,000.0 |  |  |  |  |  |  | $ 200,000,000.0
Carrying Value | $ 34,877,000 |  | $ 111,835,000 |  |  |  |  |  |  |  |
Line of credit over LIBOR rate | 1.50% |  |  |  |  |  |  |  |  |  |
Line of credit, LIBOR floor rate | 0.25% |  |  |  |  |  |  |  |  |  |
Additional line of credit |  |  |  |  |  |  |  | $ 100,000,000.0 |  |  | $ 150,000,000.0
Maximum number of additional borrowings within 12 consecutive months | borrowing |  |  |  |  |  |  |  |  |  |  | 3
Warehouse Agreement Borrowings | MUFG Union Bank, N.A. (Union Bank) | Pricing at daily floating rate LIBOR plus 1.20%, maturing June 28, 2020 | Maximum |  |  |  |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  | $ 100,000,000.0 |  |  |  |  |

X
- Definition Additional line of credit. + References No definition available. + Details
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Namespace Prefix: | cbre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line Of Credit Facility, Maximum Number Of Additional Borrowings Within 12 Consecutive Months + References No definition available. + Details
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- Definition This element represents the minimum amount for the debt instrument's basis spread over the variable interest rate on a debt instrument. + References No definition available. + Details
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Balance Type: | na
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Balance Type: | na
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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X
- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of the outstanding short-term borrowings under a revolving line of credit used by mortgage bankers to finance the origination or purchase of loans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Details
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- Details
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