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Revenue Statement of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
NET INCOME | $ 956.1 | $ 972.8 | $ 354.2 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Depreciation and amortization | 274.0 | 283.8 | 290.6 |
Provision for uncollectible receivables | (8.9) | (14.6) | 59.5 |
Amortization of restricted stock and other non-cash compensation | 50.0 | 70.1 | 67.0 |
Net amortization of bond discounts and deferred financing costs | 3.0 | 5.7 | 11.4 |
Deferred income tax provision | (27.0) | (8.2) | (46.4) |
Net losses on sales of businesses | 11.3 | 19.4 | 67.0 |
Other | 13.4 | 18.7 | 20.0 |
Net Cash Provided by (Used in) Investing Activities [Abstract] |  |  |  |
Accounts receivable | (362.7) | (647.6) | 551.4 |
Accounts receivable, billable to clients | 244.5 | (571.0) | 122.5 |
Other current assets | (61.1) | (45.9) | 11.9 |
Accounts payable | (408.0) | 1,858.1 | (27.0) |
Accrued liabilities | (102.8) | 108.9 | 179.3 |
Contract liabilities | 17.8 | 40.9 | 62.0 |
Other non-current assets and liabilities | (92.6) | (99.3) | (141.8) |
Net cash provided by operating activities | 608.8 | 2,075.6 | 1,847.2 |
Net cash used in investing activities | (430.1) | (185.3) | (216.2) |
Net cash used in financing activities | (899.4) | (1,084.2) | (346.2) |
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash | 1.6 | (45.4) | 31.0 |
Net (decrease) increase in cash, cash equivalents and restricted cash | (719.1) | 760.7 | 1,315.8 |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | $ 2,553.1 | $ 3,272.2 | $ 2,511.5 | $ 1,195.7

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