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Contingencies - Additional Information (Details) - USD ($) |  | 1 Months Ended |
--- | --- | --- | ---
Oct. 25, 2022 | Feb. 29, 2024 | May 31, 2024
Loss Contingency [Abstract] |  |  |
Loss contingency, damages awarded value | $ 1,000,000 | $ 250,000 |
Loss contingency, punitive damages value | 365,000,000 |  |
Loss contingency, approximate final judgement amount | $ 366,000,000 |  |
Loss contingency, punitive damages, vacated amount by court |  | $ 365,000,000 |
Environmental matters threshold |  |  | $ 1,000,000

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- Definition Environmental matters threshold contingencies. + References No definition available. + Details
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- Definition Loss contingency final judgement amount. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Loss contingency, punitive damages, vacated amount by court. + References No definition available. + Details
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- Definition Loss contingency punitive damages value. + References No definition available. + Details
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Namespace Prefix: | fdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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- Definition Amount of damages awarded to the plaintiff in the legal matter. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 + Details
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