Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating cash flows:
Net income before non-controlling interests	$ 1,232	$ 1,085
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization of fixed assets and capitalized software	159	156
Amortization of intangible assets	88	80
Adjustments and payments related to contingent consideration liability	2	(13)
Provision for deferred income taxes	34	42
(Gain) loss on investments	(28)	(5)
(Gain) loss on disposition of assets	(1)	9
Share-based compensation expense	99	75
Changes in assets and liabilities:
Net receivables	(388)	(318)
Other current assets	4	(18)
Other assets	(10)	(34)
Accounts payable and accrued liabilities	30	52
Accrued compensation and employee benefits	(614)	(579)
Accrued income taxes	18	45
Contributions to pension and other benefit plans in excess of current year expense/credit	(178)	(214)
Other liabilities	(10)	9
Effect of exchange rate changes	(24)	(29)
Net cash provided by operations	413	343
Financing cash flows:
Purchase of treasury shares	(500)	(400)
Net increase in commercial paper	175	100
Proceeds from issuance of debt	592	987
Repayments of debt	(6)	(256)
Shares withheld for taxes on vested units – treasury shares	(62)	(48)
Issuance of common stock from treasury shares	48	94
Payments of deferred and contingent consideration for acquisitions	(85)	(97)
Distributions of non-controlling interests	(11)	(13)
Dividends paid	(383)	(351)
Net cash (used for) provided by financing activities	(232)	16
Investing cash flows:
Capital expenditures	(135)	(144)
Net (purchases) sales of long-term investments	(3)	12
Proceeds from sales of fixed assets	1	4
Dispositions	4	0
Acquisitions	(144)	(412)
Other, net	(2)	2
Net cash used for investing activities	(279)	(538)
Effect of exchange rate changes on cash and cash equivalents	(71)	119
Decrease in cash and cash equivalents	(169)	(60)
Cash and cash equivalents at beginning of period	1,205	1,026
Cash and cash equivalents at end of period	$ 1,036	$ 966