Business Segments and Disaggregated Revenue - Schedule of Segment Information (Details) - USD ($) $ in Millions |
12 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
May 31, 2021 |
May 31, 2020 |
May 31, 2019 |
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| Segment Reporting Information [Line Items] | ||||||||||||||||||
| Revenues | [1] | $ 83,959 | $ 69,217 | $ 69,693 | [2] | |||||||||||||
| Depreciation and amortization | 3,793 | 3,615 | 3,353 | |||||||||||||||
| Operating income (loss) | 5,857 | [3] | 2,417 | [4] | 4,466 | [5] | ||||||||||||
| Segment assets | [6] | 82,777 | 73,537 | 54,403 | ||||||||||||||
| Capital expenditures | 5,884 | 5,868 | 5,490 | |||||||||||||||
| Operating Segments [Member] | FedEx Express Segment [Member] | ||||||||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||||||||
| Revenues | 42,078 | 35,513 | 37,331 | [2] | ||||||||||||||
| Depreciation and amortization | 1,946 | 1,894 | 1,801 | |||||||||||||||
| Operating income (loss) | 2,810 | [3] | 996 | [4] | 2,176 | [5] | ||||||||||||
| Segment assets | [6] | 46,356 | 41,252 | 33,247 | ||||||||||||||
| Capital expenditures | 3,503 | 3,560 | 3,550 | |||||||||||||||
| Operating Segments [Member] | FedEx Ground Segment [Member] | ||||||||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||||||||
| Revenues | 30,496 | 22,733 | 20,522 | [2] | ||||||||||||||
| Depreciation and amortization | 843 | 789 | 728 | |||||||||||||||
| Operating income (loss) | 3,193 | [3] | 2,014 | [4] | 2,663 | [5] | ||||||||||||
| Segment assets | [6] | 29,134 | 24,700 | 17,561 | ||||||||||||||
| Capital expenditures | 1,446 | 1,083 | 808 | |||||||||||||||
| Operating Segments [Member] | FedEx Freight Segment [Member] | ||||||||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||||||||
| Revenues | 7,833 | 7,102 | 7,582 | [2] | ||||||||||||||
| Depreciation and amortization | 417 | 381 | 332 | |||||||||||||||
| Operating income (loss) | 1,005 | [3] | 580 | [4] | 615 | [5] | ||||||||||||
| Segment assets | [6] | 7,371 | 6,434 | 4,736 | ||||||||||||||
| Capital expenditures | 320 | 539 | 544 | |||||||||||||||
| Operating Segments [Member] | FedEx Services Segment [Member] | ||||||||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||||||||
| Revenues | 32 | 22 | 22 | [2] | ||||||||||||||
| Depreciation and amortization | 462 | 413 | 355 | |||||||||||||||
| Segment assets | [6] | 8,639 | 7,285 | 6,061 | ||||||||||||||
| Capital expenditures | 512 | 527 | 440 | |||||||||||||||
| Corporate, Other and Eliminations [Member] | ||||||||||||||||||
| Segment Reporting Information [Line Items] | ||||||||||||||||||
| Revenues | 3,520 | 3,847 | 4,236 | |||||||||||||||
| Depreciation and amortization | 125 | 138 | 137 | |||||||||||||||
| Operating income (loss) | (1,151) | [3] | (1,173) | [4] | (988) | [5] | ||||||||||||
| Segment assets | [6] | (8,723) | (6,134) | (7,202) | ||||||||||||||
| Capital expenditures | $ 103 | $ 159 | $ 148 | |||||||||||||||
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