Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 295.2	$ 301.2
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	134.0	124.5
Provision for uncollectible receivables	9.4	9.5
Amortization of restricted stock and other non-cash compensation	59.7	59.8
Net amortization of bond discounts and deferred financing costs	4.2	4.2
Deferred income tax (benefit) provision	(22.9)	18.8
Net losses on sales of businesses	50.0	20.9
Other	4.2	16.1
Changes in assets and liabilities, net of acquisitions and divestitures, providing (using) cash:
Accounts receivable	443.6	875.8
Accounts receivable, billable to clients	(303.0)	(166.9)
Other current assets	(100.6)	(63.9)
Accounts payable	(766.9)	(961.7)
Accrued liabilities	(186.5)	(287.8)
Contract liabilities	46.1	(68.1)
Other non-current assets and liabilities	6.8	(21.4)
Net cash used in operating activities	(326.7)	(139.0)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(105.7)	(108.7)
Acquisitions, net of cash acquired	(12.0)	(22.6)
Other investing activities	1.1	(9.2)
Net cash used in investing activities	(116.6)	(140.5)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Issuance of Long-term Debt	1,994.2	0.0
Exercise of stock options	9.1	12.1
Common stock dividends	(241.6)	(211.2)
Repurchase of common stock	(117.1)	(216.0)
Acquisition-related payments	(30.4)	(49.1)
Tax payments for employee shares withheld	(28.8)	(38.4)
Distributions to noncontrolling interests	(13.4)	(16.9)
Repayment of long-term debt	(4.9)	(23.6)
Net increase in short-term borrowings	(4.6)	429.9
Other financing activities	(11.9)	0.1
Net cash provided by (used in) financing activities	1,550.6	(113.1)
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(35.3)	0.4
Net increase (decrease) in cash, cash equivalents and restricted cash	1,072.0	(392.2)
Cash, cash equivalents, and restricted cash at beginning of period	797.7	1,100.2
Cash, cash equivalents, and restricted cash at end of period	$ 1,869.7	$ 708.0