Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating cash flows:
Net income before non-controlling interests	$ 696	$ 578
Adjustments to reconcile net income to cash used for operations:
Depreciation and amortization of fixed assets and capitalized software	80	80
Amortization of intangible assets	45	40
Adjustments and payments related to contingent consideration liability	(5)	(20)
Provision for deferred income taxes	11	25
(Gain) loss on disposition of assets	(1)	6
Share-based compensation expense	50	42
Changes in assets and liabilities:
Net receivables	(357)	(146)
Other current assets	2	(43)
Other assets	(32)	(25)
Accounts payable and accrued liabilities	135	60
Accrued compensation and employee benefits	(905)	(888)
Accrued income taxes	61	56
Contributions to pension and other benefit plans in excess of current year expense/credit	(96)	(106)
Other liabilities	17	(46)
Effect of exchange rate changes	(65)	(12)
Net cash used for operations	(364)	(399)
Financing cash flows:
Purchase of treasury shares	(250)	(200)
Net increase in commercial paper	249	100
Proceeds from issuance of debt	592	987
Repayments of debt	(3)	(5)
Shares withheld for taxes on vested units – treasury shares	(61)	(48)
Issuance of common stock from treasury shares	32	73
Payments of deferred and contingent consideration for acquisitions	(70)	(34)
Distributions of non-controlling interests	(6)	(1)
Dividends paid	(189)	(175)
Net cash provided by financing activities	294	697
Investing cash flows:
Capital expenditures	(58)	(62)
Net sales of long-term investments	9	11
Proceeds from sales of fixed assets	1	1
Dispositions	3	0
Acquisitions	(24)	(411)
Other, net	(1)	0
Net cash used for investing activities	(70)	(461)
Effect of exchange rate changes on cash and cash equivalents	103	67
Increase in cash and cash equivalents	(37)	(96)
Cash and cash equivalents at beginning of period	1,205	1,026
Cash and cash equivalents at end of period	$ 1,168	$ 930