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Retirement Plans - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2021 | Nov. 30, 2022 | Nov. 30, 2021 | May 31, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan contributions by employer |  | $ 400,000,000 |  |
Non-cash MTM net loss | $ 260,000,000 |  | $ 260,000,000 |
Pension Plans [Member] | U.S. Pension Plans [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Non-cash MTM net loss | 36,000,000 |  | 36,000,000 |
Pension Plans [Member] | U.S. Pension Plans [Member] | Forecast [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan contributions by employer |  |  |  | $ 0
Pension Plans [Member] | North America [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Non-cash MTM net loss | $ 36,000,000 |  |  |
Percentage of FedEx Freight employees elected to move to new 401(k) plan | 21.00% |  |  |
MTM loss due to lower discount rate | $ 75,000,000 |  |  |
Curtailment gain | 39,000,000 |  |  |
Pension Plans [Member] | International Pension Plans [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Non-cash MTM net loss | 224,000,000 |  | $ 224,000,000 |
Pension Plans [Member] | Netherlands [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Non-cash MTM net loss | $ 224,000,000 |  |  |

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