Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Operating Activities
Net income from continuing operations	$ 111	$ 109
Net income/(loss) from discontinued operations	4	(75)
Gain on disposal of Global Connect, net of tax, within discontinued operations		542	$ 489
Net income	115	576
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Share-based compensation expense	8	8
(Gain) on sale of discontinued operations, net of tax		(542)	(489)
Currency exchange rate differences on financial transactions and other (gains)/losses	(9)	11
Equity in net income of affiliates, net of dividends received	(4)	(1)
Depreciation and amortization	130	163
Changes in operating assets and liabilities, net of effect of businesses acquired and divested:
Trade and other receivables, net	(16)	(57)
Prepaid expenses and other assets	16	(71)
Accounts payable and other current liabilities and deferred revenues	(7)	(147)
Other non-current liabilities	(19)	(17)
Interest payable		31
Income taxes	5	1
Net cash provided by/(used in) operating activities	219	(45)
Investing Activities
Proceeds from the sale of subsidiaries and affiliates, net	1	2,245
Additions to property, plant and equipment and other assets	(17)	(7)
Additions to intangible assets	(65)	(82)
Proceeds from the sale of property, plant and equipment and other assets		3
Other investing activities		(1)
Net cash (used in)/provided by investing activities	(81)	2,158
Financing Activities
Repayment of debt		(1,478)
Cash dividends paid to shareholders	(22)	(21)
Payments related to tax withholding for share-based payment arrangements	(4)	(7)
Proceeds from employee stock purchase plan	1
Finance leases	(7)	(14)
Other financing activities	(4)	(3)
Net cash used in financing activities	(36)	(1,523)
Effect of exchange-rate changes on cash and cash equivalents		(3)
Net increase in cash and cash equivalents	102	587
Cash and cash equivalents at beginning of period	380	610	610
Cash and cash equivalents at end of period	482	1,197	$ 380
Supplemental Cash Flow Information
Cash paid for income taxes	28	38
Cash paid for interest, net of amounts capitalized	$ 66	$ 57