FINANCIAL ASSETS AND LIABILITIES - Gains and Losses (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Derivative instruments in cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Recognized in OCI	$ (4)	$ 4	$ (9)	$ 4
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Reclassified from AOCI	(2)	1	(1)	1
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Amounts Excluded from Effectiveness Testing	0	0	0	0
Not designated as hedging instruments - economic hedges
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (loss) from derivatives	43	4	27	4
Foreign exchange contracts \| Not designated as hedging instruments - economic hedges
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (loss) from derivatives	$ 43	$ 4	$ 27	$ 4
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Income and Expense	Other Income and Expense	Other Income and Expense	Other Income and Expense
Cost of services. \| Derivative instruments in cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Recognized in OCI	$ (4)	$ 4	$ (9)	$ 4
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Reclassified from AOCI	$ (2)	$ 1	$ (1)	$ 1

Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 20
-Section 45
-Paragraph 1A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=121577181&loc=SL110061172-113977

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 4A
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