XML 107 R92.htm IDEA: XBRL DOCUMENT
v3.20.4

Employee Benefit Plans - 401(k) Plan Narrative (Details) - USD ($) shares in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items] |  |  |
Minimum annual employee contribution, percent | 1.00% |  |
Maximum annual employee contribution, percent | 75.00% |  |
Company contribution percent per year employed | 20.00% |  |
Defined contribution plan, expenses recognized | $ 83,500,000 | $ 59,900,000 | $ 46,300,000
Percent of 401(k) that can be invested in common stock | 25.00% |  |
Number of share held as investment under 401(k) Plan | 1.2 |  |
Annual Base Salary of Less than $100,000 |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Percent of annual compensation match percentage | 67.00% | 67.00% | 67.00%
Percent of annual compensation to be matched | 6.00% | 6.00% | 6.00%
Defined benefit plan, annual compensation expense maximum | $ 100,000 | $ 100,000 | $ 100,000
Annual Base Salary of $100,000 or Up to $150,000 |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Percent of annual compensation match percentage | 50.00% | 50.00% | 50.00%
Percent of annual compensation to be matched | 6.00% | 6.00% | 6.00%
Defined benefit plan, annual compensation expense maximum | $ 150,000 | $ 150,000 | $ 150,000
Defined benefit plan, annual compensation expense minimum | $ 100,000,000 | $ 100,000,000 | $ 100,000,000

X
- Definition Defined contribution plan minimum annual contribution per employee amount. + References No definition available. + Details
Name: | cbre_DefinedContributionPlanMinimumAnnualContributionPerEmployeeAmount
Namespace Prefix: | cbre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Contribution Plan, Minimum Annual Contributions Per Employee, Percent + References No definition available. + Details
Name: | cbre_DefinedContributionPlanMinimumAnnualContributionsPerEmployeePercent
Namespace Prefix: | cbre_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares of the reporting entity held as investments by employees in the reporting entity's defined benefit plan. + References No definition available. + Details
Name: | cbre_NumberOfShareHeldAsInvestmentByParticipantUnderDefinedContributionPlan
Namespace Prefix: | cbre_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of an employee's investment that can be invested in the reporting entity's common stock. + References No definition available. + Details
Name: | cbre_PercentOfEmployeeInvestmentInDefinedBenefitPlan
Namespace Prefix: | cbre_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage vest per year employed. + References No definition available. + Details
Name: | cbre_PercentageVestPerYearEmployed
Namespace Prefix: | cbre_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_DefinedContributionPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=cbre_AnnualBaseSalaryOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=cbre_AnnualBaseSalaryTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |