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Summary of Significant Accounting Policies - Schedule of Property and Equipment (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Property and Equipment |  |  |
Property and equipment, gross | $ 805.4 | $ 810.3 |
Accumulated depreciation | (669.7) | (659.9) |
Property and equipment, net | 135.7 |  |
Property and equipment, net | 129.4 | 150.4 | $ 236.2
Equipment |  |  |
Property and Equipment |  |  |
Property and equipment, gross | 607.7 | 608.9 |
Leasehold Improvements and Other |  |  |
Property and Equipment |  |  |
Property and equipment, gross | 151.2 | 153.7 |
Furniture and Fixtures |  |  |
Property and Equipment |  |  |
Property and equipment, gross | 46.2 | 45.4 |
Projects In Process |  |  |
Property and Equipment |  |  |
Property and equipment, gross | $ 0.3 | $ 2.3 |

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