Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 160.9	$ 92.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	67.8	69.2
Deferred income tax	19.9	18.2
Amortization of restricted stock and other non-cash compensation	12.5	20.3
Net losses on sales of businesses	6.4	12.5
Net amortization of bond discounts and deferred financing costs	0.7	2.7
Loss on Extinguishment of Debt	0.0	74.0
Provision for uncollectible receivables	(0.4)	(2.2)
Other	12.7	4.6
Changes in assets and liabilities, net of acquisitions and divestitures, providing (using) cash:
Accounts receivable	978.0	1,158.6
Accounts receivable, billable to clients	(184.7)	40.8
Other current assets	(82.1)	(68.8)
Accounts payable	(1,685.9)	(1,347.0)
Accrued liabilities	(334.5)	(233.6)
Contract liabilities	74.4	34.7
Other non-current assets and liabilities	(48.7)	(44.6)
Net cash used in operating activities	(633.6)	(249.8)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(30.7)	(28.3)
Net proceeds from investments	(2.6)	(28.8)
Other investing activities	(0.7)	(0.3)
Net cash (used in) provided by investing activities	(28.8)	0.2
CASH FLOWS FROM FINANCING ACTIVITIES:
Common stock dividends	(118.3)	(109.1)
Payments for Repurchase of Common Stock	(63.1)	0.0
Tax payments for employee shares withheld	(38.3)	(22.4)
Distributions to noncontrolling interests	(3.1)	(3.3)
Acquisition-related payments	(1.1)	(3.4)
Proceeds from Issuance of Long-term Debt	0.0	998.1
Early extinguishment of long-term debt	0.0	(1,066.8)
Exercise of stock options	0.0	8.0
Net increase (decrease) in short-term borrowings	13.9	(2.9)
Other financing activities	(0.1)	(10.9)
Net cash used in financing activities	(210.1)	(212.7)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	5.0	(30.4)
Net decrease in cash, cash equivalents and restricted cash	(867.5)	(492.7)
Cash, cash equivalents, and restricted cash at beginning of period	3,272.2	2,511.5
Cash, cash equivalents, and restricted cash at end of period	$ 2,404.7	$ 2,018.8