Ratio of EBITDA as defined in the Credit Agreement to interest expense calculated over a trailing twelve month period.

No definition available.

Name:	cbre_CoverageRatioOfEarningsBeforeInterestTaxDepreciationAndAmortizationToInterestExpenseExpressedInPercentage
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Balance Type:	na
Period Type:	instant

- Definition

Debt instrument issue price as percentage of face value.

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Principal Amount Issued, Percentage Of Face Value

+ References

No definition available.

+ Details

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Namespace Prefix:	cbre_
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- Definition

Debt instrument redemption charges.

+ References

No definition available.

+ Details

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Debt Instrument, Redemption Price, Discount Rate, Adjustment To Treasury Rate

+ References

No definition available.

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Debt Instrument, Redemption Price Following Change in Control, Percentage

+ References

No definition available.

+ Details

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- Definition

Leverage ratio of total debt to EBITDA.

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Maximum Borrowing Capacity Increase (Decrease)

+ References

No definition available.

+ Details

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Long term debt percentage spread over daily interest rate.

+ References

No definition available.

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Long term debt percentage spread over fixed interest rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	cbre_
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Period Type:	duration

- Definition

Maximum leverage ratio.

+ References

No definition available.

+ Details

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Maximum leverage ratio during first four quarter that qualified acquisition is consummated.

+ References

No definition available.

+ Details

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- Definition

This element represents the maximum ratio of debt less available cash to earnings before interest, taxes, depreciation and amortization (EBITDA) allowed in the reporting entity's credit agreement.

+ References

No definition available.

+ Details

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- Definition

This element represents the minimum ratio of earnings before interest, taxes, depreciation and amortization (EBITDA) to total interest expense required in the reporting entity's credit agreement.

+ References

No definition available.

+ Details

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- Definition

The percentage of long term debt outstanding that may be redeemed.

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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- Definition

Amount, after accumulated amortization, of debt premium.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions 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.

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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

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Period Type:	instant

- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Long-Term Debt and Short-Term Borrowings - Long-Term Debt Narrative (Details)						12 Months Ended
	Mar. 18, 2021 USD ($)	Dec. 28, 2020 USD ($)	Oct. 31, 2017 USD ($)	Aug. 13, 2015 USD ($)	Dec. 12, 2014 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 EUR (€)	Nov. 23, 2021 EUR (€)	Jul. 09, 2021 USD ($)	Sep. 26, 2014 USD ($)
Debt Instrument [Line Items]
Proceeds from revolving credit facility						$ 26,599,000	$ 835,671,000	$ 3,609,000,000
Write-off of financing costs on extinguished debt						0	75,592,000	2,608,000
Proceeds from issuance of 2.500% senior notes						$ 492,255,000	0	0
2019 Credit Agreement
Debt Instrument [Line Items]
Write-off of financing costs on extinguished debt								$ 2,600,000
2021 Credit Agreement
Debt Instrument [Line Items]
Minimum coverage ratio of EBITDA to total interest expense expressed in percentage						2.00%
Maximum leverage ratio of total debt less available cash to EBITDA expressed in percentage						4.25%
Maximum leverage ratio during first four quarter that qualified acquisition is consummated						4.75%
Coverage ratio of EBITDA to total interest expense expressed in percentage						54.94%			54.94%
Leverage ratio of total debt less available cash to EBITDA expressed in percentage						(0.04%)			(0.04%)
4.875% Senior Notes
Debt Instrument [Line Items]
Interest rate						4.875%			4.875%
4.875% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount				$ 600,000,000
Interest rate				4.875%
Redemption price percentage				99.24%
Percentage of notes available for redemption				100.00%
Redemption price percentage, following change in control				101.00%
Senior notes						$ 595,500,000	$ 594,500,000
2.500% Senior Notes
Debt Instrument [Line Items]
Interest rate							2.50%	2.50%
2.500% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 500,000,000					$ 500,000,000
Interest rate						2.50%			2.50%
Adjustment to treasury rate	0.20%
Percentage of face value	98.451%
Debt issuance cost						$ 488,100,000
2.500% Senior Notes \| Senior Notes \| Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Redemption price percentage	100.00%
5.25% Senior Notes
Debt Instrument [Line Items]
Interest rate						5.25%	5.25%	5.25%	5.25%
Proceeds from issuance of 2.500% senior notes					$ 125,000,000
5.25% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount												$ 300,000,000
Redemption charges		$ 75,600,000
Write-off of financing costs on extinguished debt		2,000,000					$ 2,000,000
Interest rate												5.25%
Price equal to percentage on face value					101.50%
Premium paid		$ 73,600,000					$ 73,600,000
Tranche A Term Loan Facility \| 2019 Credit Agreement
Debt Instrument [Line Items]
Proceeds from revolving credit facility			$ 300,000,000
Tranche A Term Loan Facility \| 2021 Credit Agreement
Debt Instrument [Line Items]
Maximum leverage ratio						2.50%
Tranche A Term Loan Facility \| 2021 Credit Agreement \| Minimum
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread						0.75%
Credit Agreement applicable daily rate spread						0.00%
Tranche A Term Loan Facility \| 2021 Credit Agreement \| Maximum
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread						1.25%
Credit Agreement applicable daily rate spread						0.25%
Tranche A Term Loan Facility \| 2021 Credit Agreement \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount \| €										€ 300,000,000
Revolving credit facility \| 2019 Credit Agreement
Debt Instrument [Line Items]
Aggregate principal amount											$ 350,000,000
Revolving credit facility \| 2021 Credit Agreement
Debt Instrument [Line Items]
Amounts available to borrow under credit agreement						$ 3,150,000,000
Revolving credit facility \| 2021 Credit Agreement \| Minimum
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread						0.68%
Credit Agreement applicable daily rate spread						0.00%
Revolving credit facility \| 2021 Credit Agreement \| Maximum
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread						1.075%
Credit Agreement applicable daily rate spread						0.075%
Euro Term Loan Facility \| 2021 Credit Agreement
Debt Instrument [Line Items]
Aggregate principal amount \| €									€ 400,000,000
Borrowings outstanding						$ 454,500,000
Euro Term Loan Facility \| 2021 Credit Agreement \| Senior Notes \| Minimum \| EURIBOR
Debt Instrument [Line Items]
Line of credit over LIBOR rate						0.75%