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Segments - Schedule of Reconciliation of Reportable Segment Operating Profit to Net Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |  |
Net income attributable to CBRE Group, Inc. | $ 225.0 |  | $ 191.0 | $ 481.0 | $ 509.0
Net income attributable to non-controlling interests | 20.0 |  | 10.0 | 54.0 | 23.0
Net income | 245.0 |  | 201.0 | 535.0 | 532.0
Adjustments to increase (decrease) net income: |  |  |  |  |
Depreciation and amortization | 178.0 |  | 149.0 | 497.0 | 465.0
Interest expense, net of interest income | 64.0 |  | 38.0 | 163.0 | 110.0
Provision for income taxes | 67.0 |  | 31.0 | 70.0 | 114.0
Costs associated with efficiency and cost-reduction initiatives | 41.0 |  | 4.0 | 137.0 | 145.0
Charges related to indirect tax audit / settlement | 25.0 |  | 0.0 | 39.0 | 0.0
Carried interest incentive compensation (reversal) expense to align with the timing of associated revenue | (4.0) |  | (8.0) | 12.0 | (2.0)
Costs incurred related to legal entity restructuring | 0.0 |  | 4.0 | 2.0 | 4.0
Integration and other costs related to acquisitions | 22.0 |  | 5.0 | 30.0 | 60.0
Provision associated with Telford’s fire safety remediation efforts | 33.0 |  | 0.0 | 33.0 | 0.0
Impact of fair value non-cash adjustments related to unconsolidated equity investments | 9.0 |  | 0.0 | 9.0 | 0.0
Total reportable segment operating profit | $ 368.0 |  | $ 269.0 | 819.0 | 613.0
Environmental Remediation Expense, before Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration] | Total reportable segment operating profit |  | Total reportable segment operating profit |  |
Transaction and business realignment costs |  | $ 18.0 |  |  |
Offset by reversal of over-accrued amount |  | $ 22.0 |  |  |
Corporate and other loss, including eliminations |  |  |  |  |
Adjustments to increase (decrease) net income: |  |  |  |  |
Total reportable segment operating profit | $ 119.0 |  | $ 111.0 | 412.0 | 319.0
Operating Segments |  |  |  |  |
Adjustments to increase (decrease) net income: |  |  |  |  |
Total reportable segment operating profit | $ 799.0 |  | $ 535.0 | $ 1,939.0 | $ 1,747.0

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