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v3.22.4

Results by Quarter (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |  |  |
Net revenue | $ 9,449.4 | $ 9,107.9 | $ 8,064.5
Billable expenses | 1,478.4 | 1,132.8 | 996.5
Total revenue | 10,927.8 | 10,240.7 | 9,061.0
Salaries and related expenses | 6,258.3 | 5,975.4 | 5,345.0
Office and other direct expenses | 1,346.4 | 1,279.6 | 1,367.9
Billable expense | 1,478.4 | 1,132.8 | 996.5
Cost of services | 9,083.1 | 8,387.8 | 7,709.4
Depreciation and amortization | 274.0 | 283.8 | 290.6
Restructuring Charges | 102.4 | 10.6 | 413.8
Total operating expenses | 9,546.6 | 8,804.5 | 8,472.6
Operating Income (Loss) | 1,381.2 | 1,436.2 | 588.4
Net losses on sales of businesses | (11.3) | (19.4) | (67.0)
Tax Adjustments, Settlements, and Unusual Provisions | 0.0 | 0.0 | (136.2)
Total (expenses) and other income | (112.3) | (214.1) | (227.1)
NET INCOME | $ 956.1 | $ 972.8 | $ 354.2
Earnings per share, Basic | $ 2.40 | $ 2.42 | $ 0.90
Earnings per share, Diluted | $ 2.37 | $ 2.39 | $ 0.89

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