Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities
Net income	$ 575	$ 381	$ 736
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	48	47	47
Excess tax benefits from stock-based compensation	(30)
Gain on sale of discontinued operations			(290)
Deferred income taxes	213	105	(107)
Currency exchange rate differences on financial transactions and other (gains)/losses	(167)	174	40
Equity in net loss/(income) of affiliates, net of dividends received	4	5	2
Depreciation and amortization	574	573	521
Changes in operating assets and liabilities, net of effect of businesses acquired and divested:
Trade and other receivables, net	(35)	(93)	(84)
Prepaid expenses and other current assets	(63)	(76)	21
Accounts payable and other current liabilities and deferred revenues	36	(4)	(55)
Other non-current liabilities	(2)	(2)	(6)
Interest payable	15	6	13
Income taxes	11	(23)	63
Net cash provided by operating activities	1,179	1,093	901
Investing Activities
Acquisition of subsidiaries and affiliates, net of cash acquired	(246)	(314)	(1,249)
Proceeds from the sale of subsidiaries and affiliates, net	30	(6)	935
Additions to property, plant and equipment and other assets	(134)	(163)	(130)
Additions to intangible assets	(274)	(249)	(244)
Proceeds from the sale of property, plant and equipment and other assets	7
Other investing activities	36		1
Net cash used in investing activities	(581)	(732)	(687)
Financing Activities
Net (payments)/borrowings under revolving credit facility	(116)	280
Proceeds from issuances of debt, net of issuance costs	746	4,544	2,485
Repayment of debt	(98)	(4,598)	(2,171)
Decrease in other short-term borrowings			(5)
Cash dividends paid to stockholders	(408)	(356)	(265)
Repurchase of common stock	(667)	(466)	(11)
Proceeds from exercise of stock options	72	103	85
Excess tax benefits from stock-based compensation	30
Other financing activities	(21)	(92)	(35)
Net cash (used in)/provided by financing activities	(462)	(585)	83
Effect of exchange-rate changes on cash and cash equivalents	(52)	(67)	(21)
Net increase/(decrease) in cash and cash equivalents	84	(291)	276
Cash and cash equivalents at beginning of period	273	564	288
Cash and cash equivalents at end of period	357	273	564
Supplemental Cash Flow Information
Cash paid for income taxes	(159)	(154)	(147)
Cash paid for interest, net of amounts capitalized	$ (296)	$ (294)	$ (304)