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v3.22.2

Commitments - Additional Information (Details) $ in Billions | 12 Months Ended
--- | ---
May 31, 2022 USD ($) AirCraft
Other Aircraft Commitments Disclosure [Abstract] |
Deposit and Progress Payments | $ | $ 1.3
B777F [Member] |
Other Aircraft Commitments Disclosure [Abstract] |
Conditional Aircraft Commitments | 2
B767F [Member] |
Other Aircraft Commitments Disclosure [Abstract] |
Conditional Aircraft Commitments | 2

X
- Definition Balance of deposits and progress payments on aircraft purchases and other planned aircraft-related transactions. + References No definition available. + Details
Name: | fdx_DepositAndProgressPayments
Namespace Prefix: | fdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of conditional aircraft commitments. + References No definition available. + Details
Name: | fdx_NumberOfConditionalAircraftCommitments
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other aircraft commitments disclosure. + References No definition available. + Details
Name: | fdx_OtherAircraftCommitmentsDisclosureAbstract
Namespace Prefix: | fdx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=fdx_Boeing777FreighterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=fdx_Boeing767FreighterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |