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Revenue Statement of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
NET INCOME | $ 715.7 | $ 1,118.1 | $ 956.1 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Depreciation and amortization | 258.9 | 264.3 | 274.0 |
Provision for uncollectible receivables | 1.9 | 7.2 | (8.9) |
Amortization of restricted stock and other non-cash compensation | 64.8 | 46.7 | 50.0 |
Net amortization of bond discounts and deferred financing costs | 1.0 | 2.0 | 3.0 |
Deferred income tax provision | (28.1) | 5.1 | (27.0) |
Net losses (gains) on sales of businesses | 64.2 | (17.9) | 11.3 |
Other | 46.2 | 26.8 | 13.4 |
Net Cash Provided by (Used in) Investing Activities [Abstract] |  |  |  |
Accounts receivable | (121.2) | (385.3) | (362.7) |
Accounts receivable, billable to clients | 42.2 | (181.4) | 244.5 |
Accounts payable | 204.1 | 47.8 | (408.0) |
Accrued liabilities | (14.7) | (63.6) | (102.8) |
Contract liabilities | (160.7) | (5.4) | 17.8 |
Other non-current assets and liabilities | (131.0) | (220.6) | (59.3) |
Net cash provided by operating activities | 1,055.2 | 554.7 | 642.1 |
Net cash used in investing activities | (151.1) | (85.4) | (430.1) |
Net cash used in financing activities | (1,019.9) | (634.3) | (899.4) |
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash | (82.9) | 7.0 | (31.7) |
Net decrease in cash, cash equivalents and restricted cash | (198.7) | (158.0) | (719.1) |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | $ 2,196.4 | $ 2,395.1 | $ 2,553.1 | $ 3,272.2

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