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Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Reimbursement Revenues | $ 1,949.8 | $ 1,756.1 | $ 5,727.1 | $ 5,160.6 |
Segment revenue: |  |  |  |  |
Revenue | 4,495.6 | 3,969.8 | 12,582.7 | 11,428.7 |
Revenue Before Reimbursements | 2,545.8 | 2,213.7 | 6,855.6 | 6,268.1 |
Operating expenses: |  |  |  |  |
Depreciation and amortization | 53.6 | 42.7 | 145.6 | 131.1 |
Operating Income (Loss) | 171.6 | 190.9 | 347.1 | 394.5 |
Equity in earnings (losses) | 17.1 | 3.4 | 32.3 | 27.2 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 4,495.6 | 3,969.8 | 12,582.7 | 11,428.7 |
Total segment operating expenses before restructuring and acquisition charges | 2,304.2 | 2,019.1 | 6,394.2 | 5,880.3 |
Cost of Reimbursable Expenses | 1,949.8 | 1,756.1 | 5,727.1 | 5,160.6 |
Segment Operating Expenses before Restructuring and acquisition | 4,254.0 | 3,775.2 | 12,121.3 | 11,040.9 |
Segment Reporting Information Operating Income Before Restructuring Charges | 241.6 | 194.6 | 461.4 | 387.8 |
Restructuring and acquisition charges | 70.0 | 3.7 | 114.3 | (6.7) |
Operating Income (Loss) | 171.6 | 190.9 | 347.1 | 394.5 |
Assets | 13,077.9 |  | 13,077.9 |  | $ 10,025.5
Reportable Subsegments [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Real Estate Revenues, Net | 1,815.4 | 1,591.4 | 4,764.5 | 4,366.4 |
Operating expenses: |  |  |  |  |
Gross contract vendor and subcontractor costs reimbursement | 717.7 | 617.0 | 2,073.7 | 1,892.4 |
Reportable Subsegments [Member] | Americas [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Reimbursement Revenues | 1,430.3 | 1,251.5 | 4,184.8 | 3,659.6 |
Segment revenue: |  |  |  |  |
Revenue | 2,687.6 | 2,201.6 | 7,401.3 | 6,295.1 |
Revenue Before Reimbursements | 1,257.3 | 950.1 | 3,216.5 | 2,635.5 |
Derivative, Gain (Loss) on Derivative, Net | 12.7 | 5.3 | 17.4 | 9.3 |
Real Estate Revenues, Net | 1,043.8 | 774.1 | 2,618.8 | 2,165.8 |
Operating expenses: |  |  |  |  |
Compensation, operating and administrative expenses | 1,045.6 | 821.2 | 2,770.1 | 2,306.8 |
Depreciation and amortization | 35.3 | 24.5 | 88.9 | 77.1 |
Operating Expenses, Excluding Reimbursed Expenses | 1,080.9 | 845.7 | 2,859.0 | 2,383.9 |
Gross contract vendor and subcontractor costs reimbursement | 200.8 | 170.7 | 580.3 | 460.4 |
Total fee based segment operating expenses | 880.1 | 675.0 | 2,278.7 | 1,923.5 |
General Contractor Cost | (200.8) | (170.7) | (580.3) | (460.4) |
Operating Income (Loss) | 176.4 | 104.4 | 357.5 | 251.6 |
Equity in earnings (losses) | 1.5 | 0.1 | 1.6 | 0.6 |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 177.9 | 104.5 | 359.1 | 252.2 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 2,687.6 | 2,201.6 | 7,401.3 | 6,295.1 |
Operating Income (Loss) | 176.4 | 104.4 | 357.5 | 251.6 |
Reportable Subsegments [Member] | EMEA [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Reimbursement Revenues | 174.1 | 171.0 | 492.4 | 480.0 |
Segment revenue: |  |  |  |  |
Revenue | 862.6 | 805.6 | 2,404.3 | 2,435.8 |
Revenue Before Reimbursements | 688.5 | 634.6 | 1,911.9 | 1,955.8 |
Real Estate Revenues, Net | 401.0 | 396.7 | 1,097.0 | 1,135.4 |
Operating expenses: |  |  |  |  |
Compensation, operating and administrative expenses | 664.6 | 611.7 | 1,896.1 | 1,931.4 |
Depreciation and amortization | 10.1 | 11.8 | 32.7 | 34.7 |
Operating Expenses, Excluding Reimbursed Expenses | 674.7 | 623.5 | 1,928.8 | 1,966.1 |
Gross contract vendor and subcontractor costs reimbursement | 287.5 | 237.9 | 814.9 | 820.4 |
Total fee based segment operating expenses | 387.2 | 385.6 | 1,113.9 | 1,145.7 |
General Contractor Cost | (287.5) | (237.9) | (814.9) | (820.4) |
Operating Income (Loss) | 13.8 | 11.1 | (16.9) | (10.3) |
Equity in earnings (losses) | 0.0 | 0.0 | (1.0) | 0.0 |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 13.8 | 11.1 | (17.9) | (10.3) |
Segment Reconciling Items: |  |  |  |  |
Revenue | 862.6 | 805.6 | 2,404.3 | 2,435.8 |
Operating Income (Loss) | 13.8 | 11.1 | (16.9) | (10.3) |
Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Reimbursement Revenues | 343.6 | 330.0 | 1,044.3 | 1,007.8 |
Segment revenue: |  |  |  |  |
Revenue | 833.8 | 790.0 | 2,437.7 | 2,314.2 |
Revenue Before Reimbursements | 490.2 | 460.0 | 1,393.4 | 1,306.4 |
Real Estate Revenues, Net | 264.9 | 252.3 | 726.0 | 698.0 |
Operating expenses: |  |  |  |  |
Compensation, operating and administrative expenses | 452.9 | 432.6 | 1,316.0 | 1,245.1 |
Depreciation and amortization | 6.5 | 5.6 | 19.3 | 17.0 |
Operating Expenses, Excluding Reimbursed Expenses | 459.4 | 438.2 | 1,335.3 | 1,262.1 |
Gross contract vendor and subcontractor costs reimbursement | 225.3 | 207.7 | 667.4 | 608.4 |
Total fee based segment operating expenses | 234.1 | 230.5 | 667.9 | 653.7 |
General Contractor Cost | (225.3) | (207.7) | (667.4) | (608.4) |
Operating Income (Loss) | 30.8 | 21.8 | 58.1 | 44.3 |
Equity in earnings (losses) | 0.7 | 1.0 | 1.4 | 2.0 |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 31.5 | 22.8 | 59.5 | 46.3 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 833.8 | 790.0 | 2,437.7 | 2,314.2 |
Operating Income (Loss) | 30.8 | 21.8 | 58.1 | 44.3 |
Investment Management [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Reimbursement Revenues | 1.8 | 3.6 | 5.6 | 13.2 |
Segment revenue: |  |  |  |  |
Revenue | 111.6 | 172.6 | 339.4 | 383.6 |
Revenue Before Reimbursements | 109.8 | 169.0 | 333.8 | 370.4 |
Real Estate Revenues, Net | 105.7 | 168.3 | 322.7 | 367.2 |
Operating expenses: |  |  |  |  |
Compensation, operating and administrative expenses | 87.5 | 110.9 | 266.4 | 265.9 |
Depreciation and amortization | 1.7 | 0.8 | 4.7 | 2.3 |
Operating Expenses, Excluding Reimbursed Expenses | 89.2 | 111.7 | 271.1 | 268.2 |
Gross contract vendor and subcontractor costs reimbursement | 4.1 | 0.7 | 11.1 | 3.2 |
Total fee based segment operating expenses | 85.1 | 111.0 | 260.0 | 265.0 |
General Contractor Cost | (4.1) | (0.7) | (11.1) | (3.2) |
Operating Income (Loss) | 20.6 | 57.3 | 62.7 | 102.2 |
Equity in earnings (losses) | 14.9 | 2.3 | 30.3 | 24.6 |
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 35.5 | 59.6 | 93.0 | 126.8 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 111.6 | 172.6 | 339.4 | 383.6 |
Operating Income (Loss) | 20.6 | 57.3 | 62.7 | 102.2 |
Leasing [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 472.7 | 424.0 | 1,354.3 | 1,151.4 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 472.7 | 424.0 | 1,354.3 | 1,151.4 |
Leasing [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 72.2 | 80.1 | 190.3 | 211.9 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 72.2 | 80.1 | 190.3 | 211.9 |
Leasing [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 59.4 | 69.3 | 161.5 | 165.2 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 59.4 | 69.3 | 161.5 | 165.2 |
Capital Markets [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 323.2 | 115.6 | 553.1 | 344.4 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 323.2 | 115.6 | 553.1 | 344.4 |
Capital Markets [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 106.2 | 108.9 | 248.7 | 288.1 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 106.2 | 108.9 | 248.7 | 288.1 |
Capital Markets [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 50.6 | 39.5 | 128.2 | 122.2 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 50.6 | 39.5 | 128.2 | 122.2 |
Property & Facility Management [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 1,386.3 | 1,271.5 | 4,119.2 | 3,713.4 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 1,386.3 | 1,271.5 | 4,119.2 | 3,713.4 |
Property & Facility Management [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 387.1 | 336.3 | 1,137.0 | 1,078.9 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 387.1 | 336.3 | 1,137.0 | 1,078.9 |
Property & Facility Management [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 539.4 | 529.2 | 1,630.6 | 1,590.6 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 539.4 | 529.2 | 1,630.6 | 1,590.6 |
Project & Development Services [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 406.0 | 304.7 | 1,091.5 | 848.8 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 406.0 | 304.7 | 1,091.5 | 848.8 |
Project & Development Services [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 234.2 | 220.1 | 633.9 | 663.5 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 234.2 | 220.1 | 633.9 | 663.5 |
Project & Development Services [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 145.7 | 108.7 | 393.9 | 309.8 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 145.7 | 108.7 | 393.9 | 309.8 |
Advisory, Consulting and Other [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 99.4 | 85.8 | 283.2 | 237.1 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 99.4 | 85.8 | 283.2 | 237.1 |
Advisory, Consulting and Other [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 62.9 | 60.2 | 194.4 | 193.4 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 62.9 | 60.2 | 194.4 | 193.4 |
Advisory, Consulting and Other [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 38.7 | 43.3 | 123.5 | 126.4 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 38.7 | 43.3 | 123.5 | 126.4 |
Advisory Fees [Member] | Investment Management [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 79.9 | 68.0 | 237.0 | 205.0 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 79.9 | 68.0 | 237.0 | 205.0 |
Transaction Fees & Other [Member] | Investment Management [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 14.2 | 9.8 | 43.7 | 33.2 |
Segment Reconciling Items: |  |  |  |  |
Revenue | 14.2 | 9.8 | 43.7 | 33.2 |
Incentive Fees [Member] | Investment Management [Member] |  |  |  |  |
Segment revenue: |  |  |  |  |
Revenue | 17.5 | 94.8 | 58.7 | 145.4 |
Segment Reconciling Items: |  |  |  |  |
Revenue | $ 17.5 | $ 94.8 | $ 58.7 | $ 145.4 |

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