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Segments - Reconciliation of Segment Operating Profit (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Restructuring Cost and Reserve [Line Items] |  |  |  |
Net income attributable to CBRE Group, Inc. stockholders |  | $ 986.0 | $ 1,407.0 | $ 1,837.0
Net income attributable to non-controlling interests |  | 41.0 | 17.0 | 5.0
Net income |  | 1,027.0 | 1,424.0 | 1,842.0
Depreciation and amortization |  | 622.0 | 613.0 | 526.0
Asset impairments | $ 10.4 | 0.0 | 58.7 | 0.0
Interest expense, net of interest income |  | 149.0 | 69.0 | 50.0
Write-off of financing costs on extinguished debt |  | 0.0 | 2.0 | 0.0
Provision for income taxes |  | 250.0 | 234.0 | 568.0
Carried interest incentive compensation (reversal) expense to align with the timing of associated revenue |  | (7.0) | (4.0) | 50.0
Impact of fair value adjustments to real estate assets acquired in the Telford acquisition (purchase accounting) that were sold in period |  | 0.0 | (5.0) | (6.0)
Costs incurred related to legal entity restructuring |  | 13.0 | 13.0 | 0.0
Integration and other costs related to acquisitions |  | 62.0 | 40.0 | 44.0
Costs associated with efficiency and cost-reduction initiatives |  | $ 159.0 | 118.0 | 0.0
Environmental Remediation Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Segment Operating Profit |  |
Provision for Telford's fire safety remediation |  | $ 0.0 | 186.0 | 0.0
One-time gain associated with remeasuring an investment in an unconsolidated subsidiary to fair value as of the date the remaining controlling interest was acquired |  | (34.0) | 0.0 | 0.0
Segment Operating Profit |  | 1,117.0 | 1,512.0 | 1,637.0
Corporate And Reconciling Items |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Depreciation and amortization |  | 56.0 | 33.0 | 29.0
Segment Operating Profit |  | 368.0 | 578.0 | 217.0
Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Segment Operating Profit |  | $ 2,609.0 | $ 3,327.0 | $ 3,291.0

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