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Restructuring-Related Expenses - Schedule of Restructuring-Related Expenses (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Restructuring-related expenses |  |  |
Expenses | $ 152.3 | $ 36.8 | $ 115.5
Total expenses, net of tax |  | 31.5 | 90.0
Cost of Services |  |  |
Restructuring-related expenses |  |  |
Expenses |  | 4.5 | 39.8
Selling, General and Administrative |  |  |
Restructuring-related expenses |  |  |
Expenses |  | $ 32.3 | $ 75.7

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