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v3.23.2

Efficiency and Cost-Reduction Initiatives - Transformation and workforce optimization (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2023
Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 2,300 | $ 147,200 | $ 149,536
Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 4,906
Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 69,847
Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 49,842
Efficiency And Cost Reduction | Real estate investments (in projects and funds) | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 24,941
Employee separation benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 64,712
Employee separation benefits | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 64,712
Employee separation benefits | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 2,538
Employee separation benefits | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 19,158
Employee separation benefits | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 29,858
Employee separation benefits | Efficiency And Cost Reduction | Real estate investments (in projects and funds) | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 13,158
Lease exit costs | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 45,351
Lease exit costs | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 1,143
Lease exit costs | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 39,273
Lease exit costs | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 731
Lease exit costs | Efficiency And Cost Reduction | Real estate investments (in projects and funds) | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 4,204
Professional fees and other |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 30,494
Professional fees and other | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 30,494
Professional fees and other | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 1,225
Professional fees and other | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 5,963
Professional fees and other | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 19,209
Professional fees and other | Efficiency And Cost Reduction | Real estate investments (in projects and funds) | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 4,097
Subtotal | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 140,557
Subtotal | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 4,906
Subtotal | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 64,394
Subtotal | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 49,798
Subtotal | Efficiency And Cost Reduction | Real estate investments (in projects and funds) | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 21,459
Depreciation expense | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 8,979
Depreciation expense | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 0
Depreciation expense | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 5,453
Depreciation expense | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 44
Depreciation expense | Efficiency And Cost Reduction | Real estate investments (in projects and funds) | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | $ 3,482

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