XML 94 R72.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Long-Term Debt and Short-Term Borrowings - Long-Term Debt - Additional Information (Detail) - USD ($) |  |  |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2017 | Nov. 01, 2016 | Mar. 21, 2016 | Sep. 03, 2015 | Aug. 13, 2015 | Dec. 12, 2014 | Sep. 26, 2014 | Mar. 14, 2013 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Jan. 31, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from revolving credit facility |  |  |  |  |  |  |  |  | $ 1,521,000,000 | $ 2,909,000,000 | $ 2,643,500,000 |  |
Repayment of revolving credit facility |  |  |  |  |  |  |  |  | $ 1,521,000,000 | 2,909,000,000 | 2,648,012,000 |  |
Debt instrument, maturity date |  |  |  |  |  |  |  |  | Mar. 01, 2026 |  |  |  |
Senior long term loans |  |  |  |  |  |  |  |  | $ 791,700,000 | 790,400,000 |  |  |
Aggregate principal amount issued |  |  |  |  |  |  |  |  |  |  | $ 595,440,000 |  |
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 |  |  |  |  |  |  |  |  | 14.74% |  |  |  |
Leverage ratio of total debt less available cash to EBITDA expressed in percentage |  |  |  |  |  |  |  |  | 79.00% |  |  |  |
Redemption on or after March 15, 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of notes available for redemption |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
2015 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amounts available to borrow under Credit Agreement |  |  |  |  |  |  |  |  | $ 2,800,000,000 |  |  |  |
Revolving credit facility maturity date |  |  |  |  |  |  |  |  | Mar. 21, 2021 |  |  |  |
Senior secured term loans outstanding |  |  |  |  |  |  |  |  |  | $ 744,300,000 |  |  |
Repayment of revolving credit facility |  | $ 101,900,000 |  |  |  |  |  |  |  |  |  |  |
2015 Credit Agreement [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Agreement applicable fixed rate spread |  |  |  |  |  |  |  |  | 0.85% |  |  |  |
2015 Credit Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Agreement applicable fixed rate spread |  |  |  |  |  |  |  |  | 1.00% |  |  |  |
2017 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amounts available to borrow under Credit Agreement |  |  |  |  |  |  |  |  | $ 2,800,000,000 |  |  |  |
Revolving credit facility maturity date |  |  |  |  |  |  |  |  | Oct. 31, 2022 |  |  |  |
2017 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% |  |  |  |
2017 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] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  |  | $ 600,000,000 |  |  |  |  |  |  |  |
Interest rate of long-term debt |  |  |  |  | 4.875% |  |  |  | 4.875% | 4.875% | 4.875% |  |
Senior long term loans |  |  |  |  |  |  |  |  | $ 592,000,000 | $ 591,200,000 |  |  |
Aggregate principal amount issued |  |  |  |  |  |  |  |  |  |  | $ 595,440,000 |  |
5.25% Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  |  |  |  | $ 300,000,000 |  |  |  |  |  |
Interest rate of long-term debt |  |  |  |  |  | 5.25% | 5.25% |  | 5.25% | 5.25% |  |  |
Debt instrument, maturity date |  |  |  |  |  |  |  |  | Mar. 15, 2025 |  |  |  |
Redemption price percentage |  |  |  |  |  |  | 101.00% |  |  |  |  |  |
Senior long term loans |  |  |  |  |  |  |  |  | $ 422,400,000 | $ 422,200,000 |  |  |
Price equal to percentage on face value |  |  |  |  |  | 101.50% |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  |  |  | $ 125,000,000 |  |  |  |  |  |  |
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% |  |  |  |  |  |
5.00% Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  |  |  |  |  | $ 800,000,000 |  |  |  |  |
Interest rate of long-term debt |  |  |  |  |  |  |  |  | 5.00% | 5.00% |  |  |
Senior long term loans |  |  |  |  |  |  |  |  | $ 791,700,000 | $ 790,400,000 |  |  |
Tranche A term loan facility [Member] | 2015 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amounts available to borrow under Credit Agreement |  |  |  |  |  |  |  |  | $ 750,000,000 |  | 500,000,000 | $ 500,000,000 |
Revolving credit facility maturity date |  |  |  |  |  |  |  |  | Jan. 09, 2020 |  |  |  |
Senior secured term loans outstanding |  |  |  |  |  |  |  |  |  | 404,600,000 |  |  |
Repayment of revolving credit facility |  | 59,400,000 |  |  |  |  |  |  |  |  |  |  |
Tranche A term loan facility [Member] | 2017 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate of long-term debt |  |  |  |  |  |  |  |  | 2.51% |  |  |  |
Proceeds from revolving credit facility | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Amounts available to borrow under Credit Agreement |  |  |  |  |  |  |  |  | $ 750,000,000 |  |  |  |
Revolving credit facility maturity date |  |  |  |  |  |  |  |  | Oct. 31, 2022 |  |  |  |
Maximum leverage ratio |  |  |  |  |  |  |  |  | 250.00% |  |  |  |
Senior secured term loans outstanding |  |  |  |  |  |  |  |  | $ 193,500,000 |  |  |  |
New Tranche B-1 and Tranche B-2 Term Loan Facilities [Member] | 2015 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  | $ 400,000,000 |  |  |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  | $ 400,000,000 |  |  |  |  |  |  | 400,000,000 |  |
Revolving credit facility [Member] | 2015 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility increase in borrowing capacity |  |  | $ 200,000,000 |  |  |  |  |  |  |  |  |  |
Amounts available to borrow under Credit Agreement |  |  |  |  |  |  |  |  | $ 2,800,000,000 |  | $ 2,600,000,000 |  |
Revolving credit facility [Member] | 2017 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from revolving credit facility | $ 83,000,000 |  |  |  |  |  |  |  |  |  |  |  |
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% |  |  |  |
Tranche B-1 term loan facility [Member] | 2015 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Amounts available to borrow under Credit Agreement |  |  |  |  |  |  |  |  | $ 270,000,000 |  |  |  |
Revolving credit facility maturity date |  |  |  |  |  |  |  |  | Sep. 03, 2020 |  |  |  |
Senior secured term loans outstanding |  |  |  |  |  |  |  |  |  | 229,400,000 |  |  |
Repayment of revolving credit facility |  | 28,700,000 |  |  |  |  |  |  |  |  |  |  |
Tranche B-2 term loan facility [Member] | 2015 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount issued |  | $ 13,800,000 |  |  |  |  |  |  |  |  |  |  |
Amounts available to borrow under Credit Agreement |  |  |  |  |  |  |  |  | $ 130,000,000 |  |  |  |
Revolving credit facility maturity date |  |  |  |  |  |  |  |  | Sep. 03, 2022 |  |  |  |
Senior secured term loans outstanding |  |  |  |  |  |  |  |  |  | $ 110,300,000 |  |  |
5.25% Senior Notes [Member] | Tranche A term loan facility [Member] | 2015 Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  |  |  |  |  |  |  |  |  |  | $ 125,000,000
Interest rate of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  | 5.25%
Senior Notes [Member] | 4.875% Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate of long-term debt |  |  |  |  | 4.875% |  |  |  | 4.875% | 4.875% |  |  |
Debt instrument, maturity date |  |  |  |  |  |  |  |  | Mar. 01, 2026 |  |  |  |
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 Notes [Member] | 5.25% Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate of long-term debt |  |  |  |  |  |  |  |  | 5.25% | 5.25% |  |  |
Senior Notes [Member] | 5.00% Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate of long-term debt |  |  |  |  |  |  |  |  | 5.00% | 5.00% |  |  |
Senior Notes [Member] | 5.00% senior notes due March 15, 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate of long-term debt |  |  |  |  |  |  |  | 5.00% |  |  |  |  |
Debt instrument, maturity date |  |  |  |  |  |  |  |  | Mar. 15, 2023 |  |  |  |
Redemption price percentage |  |  |  |  |  |  |  | 101.00% |  |  |  |  |
Senior Notes [Member] | 5.00% senior notes due March 15, 2023 [Member] | Redemption prior to March 15, 2016 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price percentage |  |  |  |  |  |  |  | 35.00% |  |  |  |  |
Senior Notes [Member] | 5.00% senior notes due March 15, 2023 [Member] | Redemption on or after March 15, 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price percentage |  |  |  |  |  |  |  | 102.50% |  |  |  |  |

X
- 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
Name: | cbg_CoverageRatioOfEarningsBeforeInterestTaxDepreciationAndAmortizationToInterestExpenseExpressedInPercentage
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt instrument issue price as percentage of face value. + References No definition available. + Details
Name: | cbg_DebtInstrumentIssuePriceAsPercentageOfFaceValue
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Leverage ratio of total debt to EBITDA. + References No definition available. + Details
Name: | cbg_LeverageRatioOfDebtToEarningsBeforeInterestTaxDepreciationAndAmortizationExpressedInPercentage
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Long term debt percentage spread over daily interest rate. + References No definition available. + Details
Name: | cbg_LongTermDebtPercentageSpreadOverDailyInterestRate
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long term debt percentage spread over fixed interest rate. + References No definition available. + Details
Name: | cbg_LongTermDebtPercentageSpreadOverFixedInterestRate
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum leverage ratio. + References No definition available. + Details
Name: | cbg_MaximumLeverageRatio
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum leverage ratio during first four quarter that qualified acquisition is consummated. + References No definition available. + Details
Name: | cbg_MaximumLeverageRatioDuringFirstFourQuarterThatQualifiedAcquisitionIsConsummated
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | cbg_MaximumLeverageRatioOfDebtToEarningsBeforeInterestTaxDepreciationAndAmortizationExpressedInPercentage
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | cbg_MinimumCoverageRatioOfEarningsBeforeInterestTaxDepreciationAndAmortizationToInterestExpenseExpressedInPercentage
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of long term debt outstanding that may be redeemed. + References No definition available. + Details
Name: | cbg_PercentageOfLongTermDebtAvailableForRedemption
Namespace Prefix: | cbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentDateOfFirstRequiredPayment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Description of the frequency of periodic payments (monthly, quarterly, annual). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentFrequencyOfPeriodicPayment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of debt redemption features under terms of the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) of the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_RepaymentsOfLinesOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_SecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_SeniorLongTermNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cbg_TwoThousandFifteenCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cbg_TwoThousandSeventeenCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cbg_FourPointEightSevenFiveSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cbg_FivePointTwoFivePercentSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cbg_FivePercentSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=cbg_TrancheATermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=cbg_NewTrancheB1AndTrancheB2TermLoanFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=cbg_TrancheBOneTermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=cbg_TrancheBTwoTermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cbg_FivePointTwoFivePercentSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cbg_FivePointZeroZeroPercentSeniorNotesDueMarchFifteenTwoThousandTwentyThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |