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Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |
Reimbursement Revenues | $ 1,863.0 | $ 1,859.0 |
Segment revenue: |  |  |
Revenue | 4,096.0 | 3,820.6 |
Revenue Before Reimbursements | 2,233.0 | 1,961.6 |
Operating expenses: |  |  |
Depreciation and amortization | 55.0 | 46.5 |
Operating Income (Loss) | 64.6 | 25.4 |
Equity in earnings (losses) | (28.3) | 5.0 |
Segment Reconciling Items: |  |  |
Revenue | 4,096.0 | 3,820.6 |
Total segment operating expenses before restructuring and acquisition charges | 2,154.3 | 1,917.6 |
Cost of Reimbursable Expenses | 1,863.0 | 1,859.0 |
Segment Operating Expenses before Restructuring and acquisition | 4,017.3 | 3,776.6 |
Segment Reporting Information Operating Income Before Restructuring Charges | 78.7 | 44.0 |
Restructuring and acquisition charges | 14.1 | 18.6 |
Operating Income (Loss) | 64.6 | 25.4 |
Assets | 13,900.8 |  | $ 13,672.6
Reportable Subsegments [Member] |  |  |
Segment revenue: |  |  |
Real Estate Revenues, Net | 1,505.2 | 1,319.1 |
Operating expenses: |  |  |
Gross contract vendor and subcontractor costs reimbursement | 729.4 | 642.6 |
Reportable Subsegments [Member] | Americas [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Reimbursement Revenues | 1,393.5 | 1,351.4 |
Segment revenue: |  |  |
Revenue | 2,523.1 | 2,250.1 |
Revenue Before Reimbursements | 1,129.6 | 898.7 |
Derivative, Gain (Loss) on Derivative, Net | (1.6) | (0.1) |
Real Estate Revenues, Net | 918.4 | 711.1 |
Operating expenses: |  |  |
Compensation, operating and administrative expenses | 1,010.3 | 810.8 |
Depreciation and amortization | 37.4 | 27.3 |
Operating Expenses, Excluding Reimbursed Expenses | 1,047.7 | 838.1 |
Gross contract vendor and subcontractor costs reimbursement | 212.8 | 187.7 |
Total fee based segment operating expenses | 834.9 | 650.4 |
General Contractor Cost | (212.8) | (187.7) |
Operating Income (Loss) | 81.9 | 60.6 |
Equity in earnings (losses) | 12.7 | (0.3) |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 94.6 | 60.3 |
Segment Reconciling Items: |  |  |
Revenue | 2,523.1 | 2,250.1 |
Operating Income (Loss) | 81.9 | 60.6 |
Reportable Subsegments [Member] | EMEA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Reimbursement Revenues | 182.8 | 164.6 |
Segment revenue: |  |  |
Revenue | 755.9 | 723.4 |
Revenue Before Reimbursements | 573.1 | 558.8 |
Real Estate Revenues, Net | 310.5 | 316.1 |
Operating expenses: |  |  |
Compensation, operating and administrative expenses | 584.4 | 576.9 |
Depreciation and amortization | 9.2 | 11.3 |
Operating Expenses, Excluding Reimbursed Expenses | 593.6 | 588.2 |
Gross contract vendor and subcontractor costs reimbursement | 262.6 | 242.7 |
Total fee based segment operating expenses | 331.0 | 345.5 |
General Contractor Cost | (262.6) | (242.7) |
Operating Income (Loss) | (20.5) | (29.4) |
Equity in earnings (losses) | 0.0 | 0.1 |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | (20.5) | (29.3) |
Segment Reconciling Items: |  |  |
Revenue | 755.9 | 723.4 |
Operating Income (Loss) | (20.5) | (29.4) |
Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Reimbursement Revenues | 284.9 | 341.1 |
Segment revenue: |  |  |
Revenue | 712.1 | 748.7 |
Revenue Before Reimbursements | 427.2 | 407.6 |
Real Estate Revenues, Net | 177.7 | 198.2 |
Operating expenses: |  |  |
Compensation, operating and administrative expenses | 417.5 | 400.5 |
Depreciation and amortization | 6.6 | 6.4 |
Operating Expenses, Excluding Reimbursed Expenses | 424.1 | 406.9 |
Gross contract vendor and subcontractor costs reimbursement | 249.5 | 209.4 |
Total fee based segment operating expenses | 174.6 | 197.5 |
General Contractor Cost | (249.5) | (209.4) |
Operating Income (Loss) | 3.1 | 0.7 |
Equity in earnings (losses) | (0.7) | 0.3 |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 2.4 | 1.0 |
Segment Reconciling Items: |  |  |
Revenue | 712.1 | 748.7 |
Operating Income (Loss) | 3.1 | 0.7 |
Investment Management [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Reimbursement Revenues | 1.8 | 1.9 |
Segment revenue: |  |  |
Revenue | 104.9 | 98.4 |
Revenue Before Reimbursements | 103.1 | 96.5 |
Real Estate Revenues, Net | 98.6 | 93.7 |
Operating expenses: |  |  |
Compensation, operating and administrative expenses | 87.1 | 82.9 |
Depreciation and amortization | 1.8 | 1.5 |
Operating Expenses, Excluding Reimbursed Expenses | 88.9 | 84.4 |
Gross contract vendor and subcontractor costs reimbursement | 4.5 | 2.8 |
Total fee based segment operating expenses | 84.4 | 81.6 |
General Contractor Cost | (4.5) | (2.8) |
Operating Income (Loss) | 14.2 | 12.1 |
Equity in earnings (losses) | (40.3) | 4.9 |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | (26.1) | 17.0 |
Segment Reconciling Items: |  |  |
Revenue | 104.9 | 98.4 |
Operating Income (Loss) | 14.2 | 12.1 |
Leasing [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |
Segment revenue: |  |  |
Revenue | 418.9 | 389.8 |
Segment Reconciling Items: |  |  |
Revenue | 418.9 | 389.8 |
Leasing [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |
Segment revenue: |  |  |
Revenue | 48.1 | 52.2 |
Segment Reconciling Items: |  |  |
Revenue | 48.1 | 52.2 |
Leasing [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Segment revenue: |  |  |
Revenue | 25.4 | 35.9 |
Segment Reconciling Items: |  |  |
Revenue | 25.4 | 35.9 |
Capital Markets [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |
Segment revenue: |  |  |
Revenue | 247.4 | 100.1 |
Segment Reconciling Items: |  |  |
Revenue | 247.4 | 100.1 |
Capital Markets [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |
Segment revenue: |  |  |
Revenue | 73.2 | 64.0 |
Segment Reconciling Items: |  |  |
Revenue | 73.2 | 64.0 |
Capital Markets [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Segment revenue: |  |  |
Revenue | 21.7 | 29.4 |
Segment Reconciling Items: |  |  |
Revenue | 21.7 | 29.4 |
Property & Facility Management [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |
Segment revenue: |  |  |
Revenue | 1,458.8 | 1,362.0 |
Segment Reconciling Items: |  |  |
Revenue | 1,458.8 | 1,362.0 |
Property & Facility Management [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |
Segment revenue: |  |  |
Revenue | 375.0 | 369.3 |
Segment Reconciling Items: |  |  |
Revenue | 375.0 | 369.3 |
Property & Facility Management [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Segment revenue: |  |  |
Revenue | 532.0 | 537.8 |
Segment Reconciling Items: |  |  |
Revenue | 532.0 | 537.8 |
Project & Development Services [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |
Segment revenue: |  |  |
Revenue | 306.4 | 308.7 |
Segment Reconciling Items: |  |  |
Revenue | 306.4 | 308.7 |
Project & Development Services [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |
Segment revenue: |  |  |
Revenue | 203.2 | 180.5 |
Segment Reconciling Items: |  |  |
Revenue | 203.2 | 180.5 |
Project & Development Services [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Segment revenue: |  |  |
Revenue | 94.8 | 110.9 |
Segment Reconciling Items: |  |  |
Revenue | 94.8 | 110.9 |
Advisory, Consulting and Other [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |
Segment revenue: |  |  |
Revenue | 91.6 | 89.5 |
Segment Reconciling Items: |  |  |
Revenue | 91.6 | 89.5 |
Advisory, Consulting and Other [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |
Segment revenue: |  |  |
Revenue | 56.4 | 57.4 |
Segment Reconciling Items: |  |  |
Revenue | 56.4 | 57.4 |
Advisory, Consulting and Other [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Segment revenue: |  |  |
Revenue | 38.2 | 34.7 |
Segment Reconciling Items: |  |  |
Revenue | 38.2 | 34.7 |
Advisory Fees [Member] | Investment Management [Member] |  |  |
Segment revenue: |  |  |
Revenue | 85.6 | 77.6 |
Segment Reconciling Items: |  |  |
Revenue | 85.6 | 77.6 |
Transaction Fees & Other [Member] | Investment Management [Member] |  |  |
Segment revenue: |  |  |
Revenue | 13.6 | 13.2 |
Segment Reconciling Items: |  |  |
Revenue | 13.6 | 13.2 |
Incentive Fees [Member] | Investment Management [Member] |  |  |
Segment revenue: |  |  |
Revenue | 5.7 | 7.6 |
Segment Reconciling Items: |  |  |
Revenue | $ 5.7 | $ 7.6 |

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