Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Activities
Net income	$ 101	$ 63
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	13	14
Currency exchange rate differences on financial transactions and other losses	1	26
Depreciation and amortization	147	142
Changes in operating assets and liabilities, net of effect of businesses acquired and divested:
Trade and other receivables, net	3	47
Prepaid expenses and other current assets	(45)	(56)
Accounts payable and other current liabilities and deferred revenues	(191)	(200)
Other non-current liabilities	(7)	(1)
Interest payable	50	57
Income taxes	15	9
Net cash provided by operating activities	87	101
Investing Activities
Acquisition of subsidiaries and affiliates, net of cash acquired	(47)	(191)
Additions to property, plant and equipment and other assets	(28)	(33)
Additions to intangible assets	(81)	(69)
Other investing activities		2
Net cash used in investing activities	(156)	(291)
Financing Activities
Net payments under revolving credit facility	(164)	(205)
Proceeds from issuances of debt, net of issuance costs	496	746
Repayment of debt	(25)	(25)
Cash dividends paid to stockholders	(101)	(90)
Repurchase of common stock	(83)	(141)
Proceeds from exercise of stock options	18	6
Other financing activities	(11)	(3)
Net cash provided by financing activities	130	288
Effect of exchange-rate changes on cash and cash equivalents	14	(28)
Net increase in cash and cash equivalents	75	70
Cash and cash equivalents at beginning of period	357	273
Cash and cash equivalents at end of period	432	343
Supplemental Cash Flow Information
Cash paid for income taxes	(29)	(29)
Cash paid for interest, net of amounts capitalized	$ (29)	$ (16)