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v3.24.2

Restructuring Activities - Schedule of Expense Incurred By Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 2.3 | $ 147.2 |  |
Efficiency And Cost Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 88.0 |  | $ 119.0 | $ 150.0
Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 58.0 |  | 89.0 | 5.0
Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 0.0 |  | 0.0 | 70.0
Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 30.0 |  | 30.0 | 50.0
Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 0.0 |  | 0.0 | 25.0
Employee separation benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  | 80.0 |
Employee separation benefits | Efficiency And Cost Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 51.0 |  | 80.0 | 65.0
Employee separation benefits | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 21.0 |  | 50.0 | 3.0
Employee separation benefits | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 0.0 |  | 0.0 | 19.0
Employee separation benefits | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 30.0 |  | 30.0 | 30.0
Employee separation benefits | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 0.0 |  | 0.0 | 13.0
Lease exit costs | Efficiency And Cost Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 46.0
Lease exit costs | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 1.0
Lease exit costs | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 39.0
Lease exit costs | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 1.0
Lease exit costs | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 5.0
Professional fees and other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  | 26.0 |
Professional fees and other | Efficiency And Cost Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 37.0 |  | 39.0 | 30.0
Professional fees and other | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 37.0 |  | 39.0 | 1.0
Professional fees and other | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 0.0 |  | 0.0 | 6.0
Professional fees and other | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 0.0 |  | 0.0 | 19.0
Professional fees and other | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 0.0 |  | $ 0.0 | 4.0
Subtotal | Efficiency And Cost Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 141.0
Subtotal | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 5.0
Subtotal | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 64.0
Subtotal | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 50.0
Subtotal | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 22.0
Depreciation expense | Efficiency And Cost Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 9.0
Depreciation expense | Efficiency And Cost Reduction | Corporate, Non-Segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 0.0
Depreciation expense | Efficiency And Cost Reduction | Advisory Services | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 6.0
Depreciation expense | Efficiency And Cost Reduction | Global Workplace Solutions | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | 0.0
Depreciation expense | Efficiency And Cost Reduction | Real Estate Investments | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | $ 3.0

X
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