v3.26.1
Business Segments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Revenue $ 6,927.9 $ 6,250.1 $ 13,314.4 $ 11,996.5
Equity in earnings (losses) (2.2) (27.4) 5.3 (53.0)
Adjusted EBITDA 386.3 291.7 659.9 516.5
Restructuring and acquisition charges (25.7) (21.3) (31.0) (41.0)
Gain (Loss) on Disposition of Business 0.6 0.0 0.6 0.0
Interest on employee loans, net 1.7 2.0 4.2 3.6
Equity earnings (losses) - Investment Management and Software and Technology Solutions (3.0) (27.0) 3.0 (55.7)
Credit losses on convertible note investments (0.1) (0.2) (0.4) (0.7)
Net non-cash MSR and mortgage banking derivative activity (10.3) (4.2) (15.8) (17.1)
Interest Expense, Net of Interest Income (26.4) (35.3) (43.4) (59.9)
Provision for income taxes (51.3) (26.7) (89.4) (40.7)
Depreciation and amortization adjusted (56.2) (66.7) (113.1) (137.4)
Depreciation and amortization 57.2 67.7 115.0 139.3
Net income attributable to common shareholders 215.6 112.3 374.6 167.6
Real Estate Management Services        
Segment Reporting [Line Items]        
Revenue 5,368.4 4,949.9 10,434.1 9,576.4
Platform compensation and benefits 527.4 515.4 1,033.0 994.9
Platform operating, administrative and other 172.6 162.8 335.7 316.0
Gross contract costs 4,560.9 4,173.5 8,891.7 8,104.5
Equity in earnings (losses) 0.3 0.5 0.8 0.9
Segment Reporting, Other Segment Item, Amount (0.4) (0.9) (1.7) (3.1)
Adjusted EBITDA 107.4 97.8 172.8 158.8
Depreciation and amortization adjusted 33.0 35.4 65.2 72.3
Leasing Advisory        
Segment Reporting [Line Items]        
Revenue 836.9 676.8 1,523.2 1,262.9
Platform compensation and benefits 593.4 479.3 1,092.0 906.1
Platform operating, administrative and other 74.1 74.2 142.2 134.6
Gross contract costs 3.6 3.3 6.0 5.3
Equity in earnings (losses) 0.0 0.0 (0.1) 0.0
Segment Reporting, Other Segment Item, Amount 0.8 0.4 0.6 0.5
Adjusted EBITDA 166.6 120.4 283.5 217.4
Depreciation and amortization 10.8 11.0 22.3 23.0
Capital Markets Services        
Segment Reporting [Line Items]        
Revenue 620.2 520.3 1,155.4 955.6
Platform compensation and benefits 451.1 374.1 841.2 703.6
Platform operating, administrative and other 83.5 95.0 157.3 165.7
Gross contract costs 2.0 1.7 2.9 2.8
Equity in earnings (losses) 0.4 0.8 0.7 2.4
Segment Reporting, Other Segment Item, Amount 0.9 0.2 1.8 0.3
Adjusted EBITDA 95.2 54.7 172.3 103.3
Net non-cash MSR and mortgage banking derivative activity 10.3 4.2 15.8 17.1
Depreciation and amortization 10.1 17.5 20.5 36.4
Investment Management        
Segment Reporting [Line Items]        
Revenue 102.4 103.1 201.7 201.6
Platform compensation and benefits 62.2 60.9 121.4 119.2
Platform operating, administrative and other 16.0 17.5 32.5 33.8
Gross contract costs 7.8 8.3 16.4 16.5
Equity in earnings (losses) 5.1 (1.3) 10.6 (7.4)
Segment Reporting, Other Segment Item, Amount 0.0 (0.1) 0.0 0.0
Adjusted EBITDA 16.4 16.3 31.4 32.1
Depreciation and amortization 2.3 2.8 5.1 5.7
Other Operating Segment        
Segment Reporting [Line Items]        
Adjusted EBITDA 0.7 2.5 (0.1) 4.9
Workplace Management | Real Estate Management Services        
Segment Reporting [Line Items]        
Revenue 3,707.7 3,349.1 7,290.6 6,612.7
Project Management | Real Estate Management Services        
Segment Reporting [Line Items]        
Revenue 1,013.4 971.6 1,857.4 1,719.1
Property Management | Real Estate Management Services        
Segment Reporting [Line Items]        
Revenue 468.6 454.4 939.7 900.0
Portfolio Services and Other | Real Estate Management Services        
Segment Reporting [Line Items]        
Revenue 120.6 118.9 231.5 231.6
Software and Technology Solutions | Real Estate Management Services        
Segment Reporting [Line Items]        
Revenue 58.1 55.9 114.9 113.0
Investment Sales, Debt/Equity Advisory and Other | Capital Markets Services        
Segment Reporting [Line Items]        
Revenue 472.2 380.6 874.7 693.2
Value and Risk Advisory | Capital Markets Services        
Segment Reporting [Line Items]        
Revenue 102.7 97.7 192.0 179.3
Loan Servicing | Capital Markets Services        
Segment Reporting [Line Items]        
Revenue 45.3 42.0 88.7 83.1
Advisory Fees | Investment Management        
Segment Reporting [Line Items]        
Revenue 94.3 93.3 184.2 182.6
Incentive and transaction fees | Investment Management        
Segment Reporting [Line Items]        
Revenue $ 8.1 $ 9.8 $ 17.5 $ 19.0