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Condensed Consolidating Financial Statements - Additional Information (Details) $ in Billions | Aug. 31, 2017 USD ($)
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Guarantor Obligations [Abstract] |
Debt Guarantee | $ 15.0

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- Definition Guarantor Obligations [Abstract] + References No definition available. + Details
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Namespace Prefix: | fdx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248 + Details
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Balance Type: | credit
Period Type: | instant