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Transformation Initiatives (Tables) | 12 Months Ended
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Dec. 31, 2020
Restructuring and Related Activities [Abstract] |
Summary of Transformation Initiative Costs | As part of these initiatives, we incurred the following costs, primarily in cash, for the year ended December 31, 2020 (dollars in thousands):
| Advisory Services |  | Global Workplace Solutions |  | Real Estate Investments |  | Consolidated
Employee separation benefits | $ | 57,550 |  |  | $ | 31,083 |  |  | $ | 2,444 |  |  | $ | 91,077 |
Lease termination costs | 43,225 |  |  | 4,586 |  |  | — |  |  | 47,811 |
Professional fees and other | 13,212 |  |  | 2,510 |  |  | 538 |  |  | 16,260 |
Subtotal | 113,987 |  |  | 38,179 |  |  | 2,982 |  |  | 155,148 |
Depreciation expense | 14,184 |  |  | 166 |  |  | 6,342 |  |  | 20,692 |
Total | $ | 128,171 |  |  | $ | 38,345 |  |  | $ | 9,324 |  |  | $ | 175,840 |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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