Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities
Net income from continuing operations	$ 109	$ 60
Net loss from discontinued operations	(75)	(73)
Gain on disposal of Connect, net of tax, within discontinued operations	542
Net income/(loss)	576	(13)
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Share-based compensation expense	8	16
(Gain) on sale of discontinued operations, net of tax	(542)
Currency exchange rate differences on financial transactions and other (gains)/losses	11	7
Equity in net income of affiliates, net of dividends received	(1)
Depreciation and amortization	163	214
Changes in operating assets and liabilities, net of effect of businesses acquired and divested:
Trade and other receivables, net	(57)	(107)
Prepaid expenses and other assets	(71)	(13)
Accounts payable and other current liabilities and deferred revenues	(147)	(92)
Other non-current liabilities	(17)	(20)
Interest payable	31	44
Income taxes	1	(41)
Net cash used in operating activities	(45)	(5)
Investing Activities
Acquisition of subsidiaries and affiliates, net of cash acquired		(27)
Proceeds from the sale of subsidiaries and affiliates, net	2,245
Additions to property, plant and equipment and other assets	(7)	(4)
Additions to intangible assets	(82)	(108)
Proceeds from the sale of property, plant and equipment and other assets	3
Other investing activities	(1)	(3)
Net cash provided by/(used in) investing activities	2,158	(142)
Financing Activities
Net borrowings under revolving credit facility		135
Repayment of debt	(1,478)	(14)
Cash dividends paid to shareholders	(21)	(21)
Activity from share-based compensation plans	(7)	(4)
Proceeds from employee stock purchase plan		1
Finance leases	(14)	(11)
Other financing activities	(3)	(4)
Net cash (used in)/provided by financing activities	(1,523)	82
Effect of exchange-rate changes on cash and cash equivalents	(3)	(30)
Net increase/(decrease) in cash and cash equivalents	587	(95)
Cash and cash equivalents at beginning of period	610	454
Cash and cash equivalents at end of period	1,197	359
Supplemental Cash Flow Information
Cash paid for income taxes	(38)	(52)
Cash paid for interest, net of amounts capitalized	$ (57)	$ (50)