FINANCIAL ASSETS AND LIABILITIES - Gains and Losses (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) from foreign currency transactions, before tax	$ (61)	$ 27
Designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Recognized in OCI	(161)	17
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Reclassified from AOCI	(2)	4
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Amounts Excluded from Effectiveness Testing	10	4
Not designated as hedging instruments - economic hedges
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (loss) from derivatives	47	(28)
Foreign exchange contracts \| Designated as hedging instruments \| Derivative instruments in cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Recognized in OCI	(10)	(1)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Reclassified from AOCI	(2)
Foreign exchange contracts \| Designated as hedging instruments \| Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Recognized in OCI	(127)	2
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Reclassified from AOCI		1
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Amounts Excluded from Effectiveness Testing	8	1
Foreign exchange contracts \| Not designated as hedging instruments - economic hedges
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (loss) from derivatives	$ 47	$ (28)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Income and Expense	Other Income and Expense
Cross-currency swap contracts \| Designated as hedging instruments \| Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Recognized in OCI	$ (24)	$ 16
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Reclassified from AOCI		3
Gain (Loss) Recognized in Earnings and Other Comprehensive Income - Amounts Excluded from Effectiveness Testing	$ 3	$ 3

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

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