Accrued interest percentage.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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- Definition

Debt instrument issue price as percentage of face value.

+ References

No definition available.

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Debt instrument redemption charges.

+ References

No definition available.

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Debt instrument redemption date.

+ References

No definition available.

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- Definition

Date the interest rate swap contract matures.

+ References

No definition available.

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Leverage ratio of total debt to EBITDA.

+ References

No definition available.

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- Definition

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.

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No definition available.

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Maximum leverage ratio.

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No definition available.

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Period Type:	duration

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

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No definition available.

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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.

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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.

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

+ References

No definition available.

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Gain (loss) on hedging derivative instrument or the foreign currency transaction gain (loss) on the nonderivative hedging instrument designated as a hedge of a net investment in foreign operations related to hedge ineffectiveness, which is included in earnings in the period.

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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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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

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

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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

+ References

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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.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Description of debt redemption features under terms of the debt agreement.

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

+ References

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Amount, after accumulated amortization, of debt premium.

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Nominal or face amount used to calculate payment on derivative.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

No definition available.

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Date the credit facility terminates, in CCYY-MM-DD format.

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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.

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Number of interest rate derivative instruments held by the entity at the reporting date.

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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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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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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.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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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), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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

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- Details

Name:	us-gaap_CreditFacilityAxis=cbre_TermLoanFacilityMember
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Long-Term Debt and Short-Term Borrowings - Long-Term Debt - Additional Information (Detail)						1 Months Ended	12 Months Ended
	Oct. 31, 2017 USD ($)	Aug. 13, 2015 USD ($)	Dec. 12, 2014 USD ($)	Sep. 26, 2014 USD ($)	Mar. 14, 2013 USD ($)	Mar. 31, 2011 USD ($) Swap	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 20, 2018 EUR (€)
Debt Instrument [Line Items]
Borrowings from line of credit							$ 3,609,000,000	$ 3,258,000,000	$ 1,521,000,000
Term loan facility due and payable							1,773,396,000	1,784,921,000
Number of interest rate swap agreements entered \| Swap						5
Derivative notional amount						$ 400,000,000.0
Ineffectiveness of significant hedge							0	0	0
Unrealized (losses) gains on interest rate swaps, net of tax								708,000	585,000
Write-off of financing costs on extinguished debt							$ 2,608,000	27,982,000
Minimum coverage ratio of EBITDA to total interest expense expressed in percentage							200.00%
Maximum leverage ratio of total debt less available cash to EBITDA expressed in percentage							425.00%
Maximum leverage ratio during first four quarter that qualified acquisition is consummated							475.00%
Coverage ratio of EBITDA to total interest expense expressed in percentage							2262.00%			2262.00%
Leverage ratio of total debt less available cash to EBITDA expressed in percentage							44.00%			44.00%
Interest rate swaps [Member]
Debt Instrument [Line Items]
Unrealized (losses) gains on interest rate swaps, net of tax							$ (100,000)	1,000,000.0	900,000
Interest rate swaps								1,100,000
Interest rate swap agreement expired on October 2017 [Member]
Debt Instrument [Line Items]
Derivative notional amount						$ 200,000,000.0
Interest rate swap, expiration date						2017-10
Interest rate swap agreement expiring on September 2019 [Member]
Debt Instrument [Line Items]
Derivative notional amount						$ 200,000,000.0
Interest rate swap, expiration date						2019-09
Reclassification out of accumulated other comprehensive income [Member] \| Accumulated net gain (loss) from designated or qualifying cash flow hedges [Member]
Debt Instrument [Line Items]
Interest expense							1,200,000	$ 2,700,000	$ 7,400,000
2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Amounts available to borrow under credit agreement							$ 2,800,000,000
Termination date							Oct. 31, 2022
2019 Credit Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread							0.875%
Credit Agreement applicable daily rate spread							0.00%
Interest rate plus EURIBOR							0.75%
2019 Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread							1.25%
Credit Agreement applicable daily rate spread							0.25%
4.875% Senior Notes [Member]
Debt Instrument [Line Items]
Term loan facility due and payable		$ 600,000,000.0
Interest rate of long-term debt							4.875%	4.875%		4.875%
4.875% Senior Notes [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date							Mar. 01, 2026
Interest rate of long-term debt		4.875%					4.875%	4.875%		4.875%
Term loan facility due and payable							$ 597,052,000	$ 596,653,000
Redemption price percentage		99.24%
Debt instrument redemption description							The 4.875% senior notes are redeemable at our option, in whole or in part, prior to December 1, 2025 at a redemption price equal to the greater of (1) 100% of the principal amount of the 4.875% senior notes to be redeemed and (2) the sum of the present values of the remaining scheduled payments of principal and interest thereon to December 1, 2025 (not including any portions of payments of interest accrued as of the date of redemption) discounted to the date of redemption on a semi-annual basis at the Adjusted Treasury Rate (as defined in the indenture governing these notes). In addition, at any time on or after December 1, 2025, the 4.875% senior notes may be redeemed by us, in whole or in part, at a redemption price equal to 100.0% of the principal amount, plus accrued and unpaid interest, if any, to (but excluding) the date of redemption. If a change of control triggering event (as defined in the indenture governing these notes) occurs, we are obligated to make an offer to purchase the then outstanding 4.875% senior notes at a redemption price of 101.0% of the principal amount, plus accrued and unpaid interest, if any, to the date of purchase.
Debt instrument, frequency of periodic payment							semi-annually
Debt instrument, date of first required payment							Mar. 01, 2016
Senior long term loans							$ 593,600,000	$ 592,800,000
5.25% Senior Notes [Member]
Debt Instrument [Line Items]
Term loan facility due and payable				$ 300,000,000.0
Debt instrument, maturity date							Mar. 15, 2025
Interest rate of long-term debt			5.25%	5.25%			5.25%	5.25%		5.25%
Redemption price percentage				101.00%
Senior long term loans							$ 423,000,000.0	$ 422,700,000
Price equal to percentage on face value			101.50%
Aggregate principal amount issued			$ 125,000,000.0
5.25% Senior Notes [Member] \| Redemption prior to December 15, 2024 [Member]
Debt Instrument [Line Items]
Redemption price percentage				100.00%
5.25% Senior Notes [Member] \| Redemption on or after December 15, 2024 [Member]
Debt Instrument [Line Items]
Percentage of notes available for redemption				100.00%
5.25% Senior Notes [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate of long-term debt							5.25%	5.25%		5.25%
Term loan facility due and payable							$ 425,952,000	$ 426,134,000
5.00% Senior Notes [Member]
Debt Instrument [Line Items]
Term loan facility due and payable					$ 800,000,000.0			$ 800,000,000.0
Interest rate of long-term debt								5.00%
Redemption date								Mar. 15, 2018
Senior notes, redemption premium								$ 20,000,000.0
Write-off of financing costs on extinguished debt								$ 8,000,000.0
5.00% Senior Notes [Member] \| Redemption on March 15, 2018 [Member]
Debt Instrument [Line Items]
Redemption charges					28,000,000.0
Senior notes, redemption premium					20,000,000.0
Write-off of financing costs on extinguished debt					$ 8,000,000.0
5.00% senior notes due March 15, 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date								Mar. 15, 2023
Interest rate of long-term debt					5.00%
Debt instrument redemption description								The 5.00% senior notes were redeemable at our option, in whole or in part, on March 15, 2018 at a redemption price of 102.5% of the principal amount on that date. We redeemed these notes in full on March 15, 2018 and incurred charges of $28.0 million, including a premium of $20.0 million and the write-off of $8.0 million of unamortized deferred financing costs. We funded this redemption with $550.0 million of borrowings from our tranche A term loan facility and $270.0 million of borrowings from our revolving credit facility under our 2017 Credit Agreement.
Debt instrument, frequency of periodic payment								semi-annually
Accrued interest percentage per year					5.00%
5.00% senior notes due March 15, 2023 [Member] \| Redemption on March 15, 2018 [Member]
Debt Instrument [Line Items]
Redemption price percentage					102.50%
Tranche A term loan facility [Member] \| 2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings from line of credit	$ 200,000,000.0
Term loan facility due and payable \| €											€ 400,000,000.0
Amounts available to borrow under credit agreement							$ 750,000,000.0
Termination date							Oct. 31, 2022
Maximum leverage ratio							250.00%
Senior secured term loans outstanding								$ 294,400,000
Interest rate of long-term debt								3.36%
Tranche A term loan facility [Member] \| 2019 Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings from line of credit	300,000,000.0
Amounts available to borrow under credit agreement							$ 300,000,000.0
Termination date							Mar. 04, 2024
Maximum leverage ratio							250.00%
Senior secured term loans outstanding							$ 297,300,000
Interest rate of long-term debt							2.69%			2.69%
Tranche A term loan facility [Member] \| 5.00% Senior Notes [Member]
Debt Instrument [Line Items]
Term loan facility due and payable					$ 550,000,000.0
Revolving credit facility [Member] \| 2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Borrowings from line of credit	$ 83,000,000.0
Term loan facility due and payable					$ 270,000,000.0
Revolving credit facility [Member] \| 2017 Credit Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread							0.775%
Credit Agreement applicable daily rate spread							0.00%
Revolving credit facility [Member] \| 2017 Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread							1.075%
Credit Agreement applicable daily rate spread							0.075%
Revolving credit facility [Member] \| 2019 Credit Agreement [Member]
Debt Instrument [Line Items]
Amounts available to borrow under credit agreement							$ 2,800,000,000
Termination date							Mar. 04, 2024
Revolving credit facility [Member] \| 2019 Credit Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread							0.68%
Credit Agreement applicable daily rate spread							0.00%
Revolving credit facility [Member] \| 2019 Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit Agreement applicable fixed rate spread							1.075%
Credit Agreement applicable daily rate spread							0.075%
Euro term loan facility [Member] \| 2019 Credit Agreement [Member]
Debt Instrument [Line Items]
Term loan facility due and payable \| €										€ 400,000,000.0
Debt instrument, maturity date							Dec. 20, 2023
Term Loan Facility \| 2017 Credit Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date							Dec. 20, 2023
Senior secured term loans outstanding								$ 456,900,000
Interest rate of long-term debt								0.75%
Term loan facility due and payable \| €										€ 400,000,000.0
Term Loan Facility \| 2019 Credit Agreement [Member]
Debt Instrument [Line Items]
Senior secured term loans outstanding							$ 447,300,000
Interest rate of long-term debt							0.75%			0.75%