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