FINANCIAL ASSETS AND LIABILITIES - Foreign Exchange Risk (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jun. 30, 2026	Mar. 31, 2026
Not designated as hedging instruments - economic hedges \| Currency swaps \| Maximum
Derivatives, Fair Value [Line Items]
Term of contract	1 year
Derivative instruments in cash flow hedges \| Designated as hedging instruments \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Maximum length of time hedged	1 year
Weighted average remaining maturity	6 months	6 months
Net loss from derivatives	$ 1	$ 7
Deferred net gains (losses) on derivatives reclassified to net income	$ (1)
Net investment hedges \| Designated as hedging instruments
Derivatives, Fair Value [Line Items]
Maximum length of time hedged	8 years
Weighted average remaining maturity	4 years	3 years
Net loss from derivatives	$ 67	$ 81
Gain (losses) on net investment hedges	$ (37)

Average period remaining until maturity of derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of decrease in the fair value of derivatives recognized in the income statement.

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Term of derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of net gains or losses on foreign currency cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

+ References

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Maximum period of hedging exposure to variability in future cash flow for forecasted transaction of cash flow hedge, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes forecasted transaction for payment of variable interest on existing financial instrument.

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Amount, before tax, of increase (decrease) in the cumulative translation adjustment from gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

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