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Business Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Aug. 31, 2015 | Aug. 31, 2014
Segment Reporting Information [Line Items] |  |
Revenues | $ 12,279 | $ 11,684
Operating Income | 1,144 | 1,062
FedEx Express Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 6,591 | 6,862
Operating Income | 545 | 377
FedEx Ground Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 3,830 | 2,960
Operating Income | 537 | 545
FedEx Freight Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 1,601 | 1,609
Operating Income | 132 | 168
FedEx Services Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 390 | 374
Eliminations, corporate and other |  |
Segment Reporting Information [Line Items] |  |
Revenues | (133) | (121)
Operating Income | $ (70) | $ (28)

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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