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v3.21.2

Restructuring and Acquisition Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring and acquisition charges | $ (15.6) | $ (33.5) | $ (50.9) | $ (75.8)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | 0.0 | (0.6) | 1.0 | (8.2)
Share-based Payment Arrangement, Noncash Expense | 3.2 | 6.2 | 15.2 | 30.5
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 45.0 | 36.5
Restructuring charges |  |  | 34.7 | 53.5
Payments made |  |  | (58.3) | (58.5)
Restructuring reserve, ending balance | 21.4 | 31.5 | $ 21.4 | 31.5
Document Period End Date |  |  | Sep. 30, 2021 |
Severance [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | $ 41.3 | 24.3
Restructuring charges | 1.2 | 19.3 | 2.1 | 27.6
Payments made |  |  | (29.0) | (22.1)
Restructuring reserve, ending balance | 14.4 | 29.8 | 14.4 | 29.8
Contract Termination [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 2.5 | 8.4
Restructuring charges |  |  | 7.7 | 9.3
Payments made |  |  | (9.4) | (16.0)
Restructuring reserve, ending balance | 0.8 | 1.7 | 0.8 | 1.7
Lease Exit [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring charges | 11.2 | 8.6 | 32.6 | 25.9
Other Restructuring [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 1.2 | 3.8
Restructuring charges |  |  | 24.9 | 16.6
Payments made |  |  | (19.9) | (20.4)
Restructuring reserve, ending balance | 6.2 | 0.0 | 6.2 | 0.0
HFF Acquisition [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Business Combination, Integration Related Costs | $ 6.6 | $ 13.8 | $ 30.5 | $ 55.2

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