Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 400.8	$ 392.7
Adjustments to Reconcile Net Income to Cash Used in Operating Activities
Deferred income tax	(29.0)	(0.1)
Net amortization of bond discounts and deferred financing costs	1.4	1.4
Provision for uncollectible receivables	3.2	(6.0)
Net losses on sales of businesses	6.8	7.1
Amortization of restricted stock and other non-cash compensation	23.9	25.3
Depreciation and amortization	133.0	134.9
Other	13.4	19.3
Changes in assets and liabilities, net of acquisitions and divestitures, providing (using) cash:
Accounts receivable	1,187.7	970.4
Accounts receivable, billable to clients	164.5	(35.4)
Other current assets	(72.3)	(112.9)
Accounts payable	(1,717.2)	(1,838.2)
Accrued liabilities	(214.8)	(302.3)
Contract liabilities	4.7	0.1
Other non-current assets and liabilities	(159.9)	(51.5)
Net cash used in operating activities	(582.8)	(724.4)
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to Acquire Marketable Securities	97.6	0.0
Capital expenditures	(79.3)	(72.3)
Deconsolidation of a subsidiary	0.0	20.4
Acquisitions, net of cash acquired	6.3	0.0
Net proceeds from investments	(21.7)	(2.6)
Other investing activities	5.8	0.3
Net cash used in investing activities	(155.7)	(89.8)
CASH FLOWS FROM FINANCING ACTIVITIES:
Common stock dividends	(242.6)	(232.1)
Repurchases of Common Stock	(128.0)	(147.9)
Tax payments for employee shares withheld	(58.0)	(39.6)
Net decrease in short-term borrowings	(11.0)	(12.1)
Acquisition-related payments	(10.1)	(6.0)
Distributions to noncontrolling interests	(8.5)	(5.2)
Proceeds from Issuance of Long-term Debt	(296.3)	(0.0)
Other financing activities	(2.6)	(0.2)
Net cash used in financing activities	(164.5)	(443.1)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(13.7)	(28.8)
Net decrease in cash, cash equivalents and restricted cash	(916.7)	(1,286.1)
Cash, cash equivalents, and restricted cash at beginning of period	2,553.1	3,272.2
Cash, cash equivalents, and restricted cash at end of period	$ 1,636.4	$ 1,986.1