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Business Segments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 23,432.9 | $ 20,760.8 | $ 20,862.1
Equity in earnings (losses) | (70.8) | (194.1) | 51.0
Adjusted EBITDA | 1,186.3 | 938.4 | 1,200.3
Restructuring and acquisition charges | (23.1) | (100.7) | (104.8)
Gain (Loss) on Disposition of Business | 0.0 | (0.5) | (7.5)
Interest on employee loans, net [Abstract] | 5.9 | 3.6 | 9.7
Equity earnings (losses) - JLL Technologies and LaSalle | (76.4) | (201.7) | 47.0
Credit losses on convertible note investments | (6.3) | 0.0 | 0.0
Net non-cash mortgage servicing rights and mortgage banking derivative activity | (18.2) | (18.2) | 11.0
Interest Income (Expense), Operating | (136.9) | (135.4) | (75.2)
Income Tax Expense (Benefit) | (132.5) | (25.7) | (200.8)
Depreciation and amortization adjusted | 252.0 | 234.4 | 225.2
Depreciation and amortization | 255.8 | 238.4 | 228.1
Net Income available to common stockholders | 546.8 | 225.4 | 654.5
Markets Advisory |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 4,500.7 | 4,121.6 | 4,415.5
Platform compensation and benefits | 2,309.2 | 2,178.2 | 2,433.7
Platform operating, admin and other | 371.9 | 368.3 | 405.0
Gross contract costs | 1,269.6 | 1,153.6 | 1,055.3
Equity in earnings (losses) | 0.7 | (0.5) | (0.3)
Segment Reporting, Other Segment Item, Amount | (3.1) | (4.4) | 6.3
Adjusted EBITDA | 547.6 | 416.6 | 527.5
Depreciation and amortization adjusted | 66.2 | 65.6 | 70.6
Capital Markets [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 2,040.4 | 1,778.0 | 2,488.2
Platform compensation and benefits | 1,491.9 | 1,337.7 | 1,727.1
Platform operating, admin and other | 278.4 | 246.1 | 263.2
Gross contract costs | 48.6 | 47.5 | 47.0
Equity in earnings (losses) | 2.7 | 6.7 | 3.1
Segment Reporting, Other Segment Item, Amount | 20.2 | 19.7 | (10.0)
Adjusted EBITDA | 244.4 | 173.1 | 444.0
Depreciation and amortization | 66.8 | 65.6 | 61.6
Work Dynamics |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 16,197.6 | 14,131.1 | 13,268.5
Platform compensation and benefits | 1,385.8 | 1,305.1 | 1,202.3
Platform operating, admin and other | 467.8 | 431.6 | 432.9
Gross contract costs | 14,029.9 | 12,131.4 | 11,403.8
Equity in earnings (losses) | 2.2 | 1.4 | 1.2
Segment Reporting, Other Segment Item, Amount | 0.0 | (0.4) | (0.6)
Adjusted EBITDA | 316.3 | 264.0 | 230.1
Depreciation and amortization | 91.1 | 79.2 | 71.1
JLL Technologies |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 226.3 | 246.4 | 213.9
Platform compensation and benefits | 197.0 | 200.7 | 240.3
Platform operating, admin and other | 54.2 | 50.3 | 57.4
Gross contract costs | 5.5 | 14.5 | 13.7
Equity in earnings (losses) | (53.8) | (177.0) | 46.6
Segment Reporting, Other Segment Item, Amount | 8.1 | 0.0 | 0.0
Adjusted EBITDA | (22.3) | (19.1) | (97.5)
Depreciation and amortization | 19.4 | 15.9 | 15.4
LaSalle Investment Management [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 467.9 | 483.7 | 476.0
Platform compensation and benefits | 268.9 | 288.7 | 290.4
Platform operating, admin and other | 69.8 | 62.6 | 59.7
Gross contract costs | 37.4 | 28.9 | 29.3
Equity in earnings (losses) | (22.6) | (24.7) | 0.4
Segment Reporting, Other Segment Item, Amount | 8.5 | 0.3 | (0.4)
Adjusted EBITDA | 100.3 | 103.8 | 96.2
Depreciation and amortization | 8.5 | 8.1 | 6.5
Leasing [Member] | Markets Advisory |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 2,596.2 | 2,343.6 | 2,759.2
Property Management | Markets Advisory |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,795.1 | 1,675.1 | 1,525.3
Advisory, Consulting and Other | Markets Advisory |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 109.4 | 102.9 | 131.0
Investment Sales, Debt/Equity Advisory and Other | Capital Markets [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,506.2 | 1,261.6 | 1,955.4
Value and Risk Advisory | Capital Markets [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 373.0 | 363.8 | 374.9
Loan Servicing | Capital Markets [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 161.2 | 152.6 | 157.9
Workplace Management | Work Dynamics |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 12,529.7 | 10,706.2 | 9,819.2
Project Management | Work Dynamics |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 3,151.9 | 2,924.8 | 2,972.3
Portfolio Services and Other | Work Dynamics |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 516.0 | 500.1 | 477.0
Advisory Fees [Member] | LaSalle Investment Management [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 373.8 | 406.2 | 404.6
Transaction Fees & Other [Member] | LaSalle Investment Management [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 33.5 | 30.0 | 44.8
Incentive Fees [Member] | LaSalle Investment Management [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 60.6 | $ 47.5 | $ 26.6

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