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Leases (Details 3) | 12 Months Ended |
--- | --- | ---
May. 31, 2015 | May. 31, 2014
Other Lease Information (Details) [Abstract] |  |
Percentage Total Aircraft Fleet Leased | 10.00% | 10.00%
Operating Leases Weighted-Average Remaining Lease Term | 6 years |

X
- References No definition available. + 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

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- 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