Business Segments and Disaggregated Revenue - Schedule of Segment Information (Parenthetical) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
May 31, 2019 |
Feb. 28, 2019 |
Nov. 30, 2018 |
Aug. 31, 2018 |
May 31, 2018 |
Feb. 28, 2018 |
Nov. 30, 2017 |
Aug. 31, 2017 |
May 31, 2019 |
May 31, 2018 |
May 31, 2017 |
|
| Segment Reporting Information [Line Items] | |||||||||||
| Integration expenses and restructuring charges | $ 84 | $ 69 | $ 114 | $ 121 | $ 136 | $ 106 | $ 122 | $ 112 | $ 388 | $ 477 | $ 327 |
| Business realignment costs | $ 316 | $ 4 | 320 | ||||||||
| Goodwill and other asset impairment charges | 380 | $ 380 | |||||||||
| Charges for legal reserves related to U.S. CBP pending protection matters | $ 1 | $ 7 | 39 | ||||||||
| FedEx Ground Segment [Member] | |||||||||||
| Segment Reporting Information [Line Items] | |||||||||||
| Ground independent contractor legal expense | $ 46 | $ 46 | $ 22 | ||||||||