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Leases (Details 3)	12 Months Ended
	May 31, 2014	May 31, 2013
Other Lease Information (Details) [Abstract]
Percentage Total Aircraft Fleet Leased	10.00%fdx_PercentageTotalAircraftFleetLeased	10.00%fdx_PercentageTotalAircraftFleetLeased
Operating Leases Weighted-Average Remaining Lease Term	6 years

X

- Details

Name:	fdx_OtherLeaseInformationDetailsAbstract
Namespace Prefix:	fdx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of total aircraft fleet leased under capital or operating leases as of the period-end date.

+ References

No definition available.

+ Details

Name:	fdx_PercentageTotalAircraftFleetLeased
Namespace Prefix:	fdx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The weighted-average remaining lease term for all operating leases outstanding at the period-end date.

+ References

No definition available.

+ Details

Name:	fdx_WeightedAverageRemainingLeaseTermOperating
Namespace Prefix:	fdx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration