INCOME TAXES - Gross Unrecognized Tax Benefits, Including Acquisitions (Details) - USD ($) $ in Millions	12 Months Ended
May 31, 2021	May 31, 2020	May 31, 2019
Gross Unrecognized Tax Benefits Including Acquisitions [Abstract]
Gross unrecognized tax benefits as of June 1	$ 6,972	$ 6,348	$ 5,592
Increases related to tax positions from prior fiscal years	225	624	772
Decreases related to tax positions from prior fiscal years	(836)	(298)	(135)
Increases related to tax positions taken during current fiscal year	531	628	540
Settlements with tax authorities	(51)	(177)	(153)
Lapses of statutes of limitation	(66)	(116)	(202)
Cumulative translation adjustments and other, net	(137)	(37)	(66)
Total gross unrecognized tax benefits as of May 31	$ 6,912	$ 6,972	$ 6,348

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount of unrecognized tax benefits.

+ References

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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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