Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating cash flows:
Net income before non-controlling interests	$ 1,636	$ 1,497	$ 1,385
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization of fixed assets and capitalized software	314	302	286
Amortization of intangible assets	109	86	72
Intangible asset impairment	0	0	5
Adjustments and payments related to contingent consideration liability	11	19	24
Cost of early extinguishment of debt	0	137	24
Provision for deferred income taxes	178	127	184
Gain on investments	(38)	(37)	(69)
(Gain) Loss on disposition of assets	(13)	(38)	1
Share-based compensation expense	88	93	129
Changes in assets and liabilities:
Net receivables	(52)	(58)	(245)
Other current assets	3	8	1
Other assets	(10)	13	(141)
Accounts payable and accrued liabilities	(125)	45	106
Accrued compensation and employee benefits	23	167	(8)
Accrued income taxes	(15)	33	43
Contributions to pension and other benefit plans in excess of current year expense/credit	(231)	(152)	(432)
Other liabilities	(60)	(196)	8
Effect of exchange rate changes	70	73	(32)
Net cash provided by operations	1,888	2,119	1,341
Financing cash flows:
Purchase of treasury shares	(1,400)	(800)	(550)
Proceeds from debt	1,091	1,386	547
Repayments of debt	(61)	(331)	(260)
Payments for early extinguishment of debt	0	(765)	(274)
Shares withheld for taxes on vested units – treasury shares	(49)	(64)	(79)
Issuance of common stock from treasury shares	224	263	352
Payments of deferred and contingent consideration for acquisitions	(49)	(55)	(9)
Distributions of non-controlling interests	(30)	(20)	(28)
Dividends paid	(632)	(582)	(533)
Net cash used for financing activities	(906)	(968)	(834)
Investing cash flows:
Capital expenditures	(325)	(368)	(401)
Net (purchases) sales of long-term investments	(65)	6	93
Purchase of equity investment	0	(304)	0
Proceeds from sales of fixed assets	2	3	5
Dispositions	71	0	5
Acquisitions	(952)	(554)	(142)
Other, net	4	(5)	(6)
Net cash used for investing activities	(1,265)	(1,222)	(446)
Effect of exchange rate changes on cash and cash equivalents	(301)	(274)	(59)
(Decrease) increase in cash and cash equivalents	(584)	(345)	2
Cash and cash equivalents at beginning of period	1,958	2,303	2,301
Cash and cash equivalents at end of period	$ 1,374	$ 1,958	$ 2,303