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v3.22.0.1

Restructuring and Acquisition Charges (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and acquisition charges | $ 84.7 | $ 142.4 | $ 184.4
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | (2.6) | 14.8 | (28.4)
Share-based Payment Arrangement, Noncash Expense | 17.8 | 36.7 | 28.0
Restructuring reserve [Roll Forward] |  |  |
Restructuring reserve, beginning balance | 45.0 | 36.5 | 15.1
Accruals | 64.3 | 120.5 | 128.0
Payments made | (79.5) | (112.0) | (106.6)
Restructuring reserve, ending balance | 29.8 | 45.0 | 36.5
Severance [Member] |  |  |
Restructuring reserve [Roll Forward] |  |  |
Restructuring reserve, beginning balance | 41.3 | 24.3 | 14.0
Accruals | 14.3 | 69.0 | 31.1
Payments made | (34.7) | (52.0) | (20.8)
Restructuring reserve, ending balance | 20.9 | 41.3 | 24.3
Lease Exit [Member] |  |  |
Restructuring reserve [Roll Forward] |  |  |
Restructuring reserve, beginning balance | 2.5 | 8.4 | 0.6
Accruals | 11.6 | 25.0 | 11.1
Payments made | (13.2) | (30.9) | (3.3)
Restructuring reserve, ending balance | 0.9 | 2.5 | 8.4
Other Restructuring and Acquisition Costs [Member] |  |  |
Restructuring reserve [Roll Forward] |  |  |
Restructuring reserve, beginning balance | 1.2 | 3.8 | 0.5
Accruals | 38.4 | 26.5 | 85.8
Payments made | (31.6) | (29.1) | (82.5)
Restructuring reserve, ending balance | 8.0 | 1.2 | 3.8
Contract Termination and Other Charges |  |  |
Restructuring reserve [Roll Forward] |  |  |
Accruals | 50.0 | 51.5 | 96.9
HFF Acquisition [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Business Combination, Integration Related Costs | $ 40.0 | $ 75.9 | $ 115.1

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