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Commitments - Schedule of Aircraft Purchase Commitments (Details) | 12 Months Ended
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May 31, 2022 AirCraft
Schedule of Aircraft Commitments [Line Items] |
2023 | 38
2024 | 36
2025 | 30
2026 | 15
Total | 119
Cessna SkyCourier 408 [Member] |
Schedule of Aircraft Commitments [Line Items] |
2023 | 11
2024 | 12
2025 | 12
2026 | 14
Total | 49
ATR 72-600F [Member] |
Schedule of Aircraft Commitments [Line Items] |
2023 | 11
2024 | 6
2025 | 6
2026 | 1
Total | 24
B767F [Member] |
Schedule of Aircraft Commitments [Line Items] |
2023 | 14
2024 | 14
2025 | 10
Total | 38
B777F [Member] |
Schedule of Aircraft Commitments [Line Items] |
2023 | 2
2024 | 4
2025 | 2
Total | 8

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- Definition The total number of aircraft committed to be purchased. + References No definition available. + Details
Name: | fdx_AircraftPurchaseObligation
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Aircraft purchase obligation with delivery due in first fiscal year. + References No definition available. + Details
Name: | fdx_AircraftPurchaseObligationWithDeliveryDueInFirstFiscalYear
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of aircraft committed to be purchased with a delivery date in the fourth fiscal year. + References No definition available. + Details
Name: | fdx_AircraftPurchaseObligationWithDeliveryDueInFourthFiscalYear
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of aircraft committed to be purchased with a delivery date in the second fiscal year. + References No definition available. + Details
Name: | fdx_AircraftPurchaseObligationWithDeliveryDueInSecondFiscalYear
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of aircraft committed to be purchased with a delivery date in the third fiscal year. + References No definition available. + Details
Name: | fdx_AircraftPurchaseObligationWithDeliveryDueInThirdFiscalYear
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Aircraft Commitments [Line Items] + References No definition available. + Details
Name: | fdx_ScheduleOfAircraftCommitmentsLineItems
Namespace Prefix: | fdx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=fdx_CessnaCE408AircraftMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=fdx_ATR72600FreighterMember
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: |

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