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Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | $ 292.9 | $ 154.9 | $ 597.9 | $ 230.3
Restructuring and acquisition charges | (15.6) | (33.5) | (50.9) | (75.8)
Depreciation and amortization | 52.8 | 54.9 | 160.3 | 166.8
Equity in earnings (losses) | (17.4) | (15.0) | (106.7) | (1.4)
Segment revenue: |  |  |  |
Revenue Before Reimbursements | 2,804.9 | 2,091.4 | 7,442.0 | 6,152.9
Revenue | 4,889.2 | 3,978.1 | 13,421.3 | 11,744.5
Exclusive of LaSalle Investment Company II [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation and amortization | 1.8 | 1.8 | 5.1 | 5.4
Equity in earnings (losses) | (8.4) | (8.5) | (44.7) | 20.5
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 29.7 | 29.5 | 88.9 | 28.8
Segment revenue: |  |  |  |
Revenue | 129.8 | 110.3 | 336.8 | 315.1
Americas [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation and amortization | 33.2 | 36.4 | 100.6 | 112.9
Equity in earnings (losses) | (7.6) | (4.8) | (58.6) | (20.4)
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 285.6 | 140.0 | 637.2 | 277.1
Segment revenue: |  |  |  |
Revenue | 3,083.2 | 2,380.8 | 8,228.6 | 7,132.9
EMEA [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation and amortization | 10.3 | 9.8 | 32.2 | 28.0
Equity in earnings (losses) | 0.0 | (0.8) | 0.0 | (0.8)
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | (10.3) | (1.9) | (45.8) | (55.8)
Segment revenue: |  |  |  |
Revenue | 830.0 | 743.8 | 2,356.0 | 2,125.9
Asia Pacific [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation and amortization | 7.5 | 6.9 | 22.4 | 20.5
Equity in earnings (losses) | (1.4) | (0.9) | (3.4) | (0.7)
Operating Income (Loss), Including Income (Loss) from Equity Method Investments | 20.9 | 35.8 | 75.2 | 57.4
Segment revenue: |  |  |  |
Revenue | 846.2 | 743.2 | 2,499.9 | 2,170.6
Leasing [Member] | Americas [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 594.6 | 325.2 | 1,442.5 | 1,022.2
Leasing [Member] | EMEA [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 80.6 | 58.5 | 209.0 | 153.3
Leasing [Member] | Asia Pacific [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 63.6 | 46.6 | 147.7 | 105.8
Capital Markets [Member] | Americas [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 421.2 | 190.8 | 934.1 | 579.0
Capital Markets [Member] | EMEA [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 110.4 | 73.3 | 284.0 | 196.5
Capital Markets [Member] | Asia Pacific [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 43.4 | 20.4 | 125.7 | 66.1
Property & Facility Management [Member] | Americas [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 1,564.8 | 1,433.3 | 4,576.8 | 4,331.6
Property & Facility Management [Member] | EMEA [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 368.5 | 348.7 | 1,074.5 | 1,044.2
Property & Facility Management [Member] | Asia Pacific [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 567.3 | 521.3 | 1,729.9 | 1,568.5
Project & Development Services [Member] | Americas [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 389.2 | 336.2 | 962.0 | 917.9
Project & Development Services [Member] | EMEA [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 207.2 | 190.8 | 595.7 | 558.3
Project & Development Services [Member] | Asia Pacific [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 111.5 | 104.5 | 319.7 | 296.5
Advisory, Consulting and Other [Member] | Americas [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 113.4 | 95.3 | 313.2 | 282.2
Advisory, Consulting and Other [Member] | EMEA [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 63.3 | 72.5 | 192.8 | 173.6
Advisory, Consulting and Other [Member] | Asia Pacific [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 60.4 | 50.4 | 176.9 | 133.7
Advisory Fees [Member] | Exclusive of LaSalle Investment Company II [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 97.3 | 84.6 | 270.4 | 251.1
Transaction Fees & Other [Member] | Exclusive of LaSalle Investment Company II [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | 10.2 | 17.7 | 28.9 | 36.1
Incentive Fees [Member] | Exclusive of LaSalle Investment Company II [Member] |  |  |  |
Segment revenue: |  |  |  |
Revenue | $ 22.3 | $ 8.0 | $ 37.5 | $ 27.9

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