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v3.20.2

Restructuring and Acquisition Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring and acquisition charges | $ (33.5) | $ (70.0) | $ (75.8) | $ (114.3)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | (0.6) | 0.7 | (8.2) | 20.7
Share-based Payment Arrangement, Noncash Expense | 6.2 | 14.0 | 30.5 | 14.0
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 36.5 | 15.1
Restructuring charges |  |  | 53.5 | 79.6
Payments made |  |  | (58.5) | (77.5)
Restructuring reserve, ending balance | 31.5 | 17.2 | $ 31.5 | 17.2
Document Period End Date |  |  | Sep. 30, 2020 |
Severance [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | $ 24.3 | 14.0
Restructuring charges | 19.3 | 7.2 | 27.6 | 17.6
Payments made |  |  | (22.1) | (21.2)
Restructuring reserve, ending balance | 29.8 | 10.4 | 29.8 | 10.4
Contract Termination [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 8.4 | 0.6
Restructuring charges |  |  | 9.3 | 5.8
Payments made |  |  | (16.0) | (1.5)
Restructuring reserve, ending balance | 1.7 | 4.9 | 1.7 | 4.9
Lease Exit [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring charges | 8.6 | 48.1 | 25.9 | 62.0
Other Restructuring [Member] |  |  |  |
Restructuring reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 3.8 | 0.5
Restructuring charges |  |  | 16.6 | 56.2
Payments made |  |  | (20.4) | (54.8)
Restructuring reserve, ending balance | 0.0 | 1.9 | 0.0 | 1.9
HFF Acquisition [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Business Combination, Integration Related Costs | $ 13.8 | $ 60.1 | 55.2 | $ 69.8
Restructuring reserve [Roll Forward] |  |  |  |
Expense to be recognized for retention awards |  |  | $ 100.0 |

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