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v3.22.4

Restructuring Activities - Transformation and workforce optimization (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 117,500 | $ 0 |
Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 126,356 |  |
Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 31,383 |  |
Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 51,299 |  |
Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 31,175 |  |
Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 12,499 |  |
Transformation Initiatives |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | $ 175,840
Transformation Initiatives | Advisory Services |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 128,171
Transformation Initiatives | Global Workplace Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 38,345
Transformation Initiatives | Real Estate Investments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 9,324
Employee separation benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 81,514 |  |
Employee separation benefits | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 81,514 |  |
Employee separation benefits | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 19,198 |  |
Employee separation benefits | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 32,594 |  |
Employee separation benefits | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 19,961 |  |
Employee separation benefits | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 9,761 |  |
Employee separation benefits | Transformation Initiatives |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 91,077
Employee separation benefits | Transformation Initiatives | Advisory Services |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 57,550
Employee separation benefits | Transformation Initiatives | Global Workplace Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 31,083
Employee separation benefits | Transformation Initiatives | Real Estate Investments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 2,444
Lease termination costs | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 12,611 |  |
Lease termination costs | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 0 |  |
Lease termination costs | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 9,695 |  |
Lease termination costs | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 2,916 |  |
Lease termination costs | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 0 |  |
Lease termination costs | Transformation Initiatives |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 47,811
Lease termination costs | Transformation Initiatives | Advisory Services |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 43,225
Lease termination costs | Transformation Initiatives | Global Workplace Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 4,586
Lease termination costs | Transformation Initiatives | Real Estate Investments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 0
Professional fees and other |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 23,409 |  |
Professional fees and other | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 23,409 |  |
Professional fees and other | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 12,185 |  |
Professional fees and other | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 3,446 |  |
Professional fees and other | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 5,040 |  |
Professional fees and other | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 2,738 |  |
Professional fees and other | Transformation Initiatives |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 16,260
Professional fees and other | Transformation Initiatives | Advisory Services |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 13,212
Professional fees and other | Transformation Initiatives | Global Workplace Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 2,510
Professional fees and other | Transformation Initiatives | Real Estate Investments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 538
Subtotal | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 117,534 |  |
Subtotal | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 31,383 |  |
Subtotal | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 45,735 |  |
Subtotal | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 27,917 |  |
Subtotal | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 12,499 |  |
Subtotal | Transformation Initiatives |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 0 | $ 0 | 155,148
Subtotal | Transformation Initiatives | Advisory Services |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 113,987
Subtotal | Transformation Initiatives | Global Workplace Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 38,179
Subtotal | Transformation Initiatives | Real Estate Investments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 2,982
Depreciation expense | Efficiency And Cost Reduction |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 8,822 |  |
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 | 5,564 |  |
Depreciation expense | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 3,258 |  |
Depreciation expense | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 0 |  |
Depreciation expense | Transformation Initiatives |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 20,692
Depreciation expense | Transformation Initiatives | Advisory Services |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 14,184
Depreciation expense | Transformation Initiatives | Global Workplace Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | 166
Depreciation expense | Transformation Initiatives | Real Estate Investments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  |  | $ 6,342

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