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CONTINGENCIES (Details) $ in Millions	Aug. 31, 2025 USD ($)
Loss Contingency [Abstract]
Environmental matters threshold	$ 1

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- Definition

Environmental matters threshold contingencies.

+ References

No definition available.

+ Details

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Namespace Prefix:	fdx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_LossContingencyAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration