Consolidated Statements of Income - USD ($) $ in Millions		12 Months Ended
		May 31, 2019		May 31, 2018		May 31, 2017
Income Statement [Abstract]
REVENUES	[1]	$ 69,693		$ 65,450	[2]	$ 60,319	[2]
OPERATING EXPENSES:
Salaries and employee benefits		24,776		23,795		21,989
Purchased transportation		$ 16,654		$ 15,101		$ 13,630
Type of cost, good or service [extensible list]		us-gaap:ShippingAndHandlingMember		us-gaap:ShippingAndHandlingMember		us-gaap:ShippingAndHandlingMember
Rentals and landing fees		$ 3,360		$ 3,361		$ 3,240
Depreciation and amortization		3,353		3,095		2,995
Fuel		3,889		3,374		2,773
Maintenance and repairs		2,834		2,622		2,374
Business realignment costs		320
Goodwill and other asset impairment charges				380
Other		10,041		9,450		8,752
OPERATING EXPENSES		65,227		61,178		55,753
OPERATING INCOME		4,466	[3]	4,272	[4]	4,566	[5]
OTHER (EXPENSE) INCOME:
Interest expense		(588)		(558)		(512)
Interest income		59		48		33
Other retirement plans (expense) income		(3,251)		598		471
Other, net		(31)		(7)		21
OTHER INCOME (EXPENSE)		(3,811)		81		13
INCOME BEFORE INCOME TAXES		655		4,353		4,579
PROVISION FOR INCOME TAXES (BENEFIT)		115		(219)		1,582
NET INCOME		$ 540		$ 4,572		$ 2,997
BASIC EARNINGS PER COMMON SHARE		$ 2.06		$ 17.08		$ 11.24
DILUTED EARNINGS PER COMMON SHARE		$ 2.03		$ 16.79		$ 11.07

[1] International revenue includes shipments that either originate in or are destined to locations outside the United States, which could include U.S. payors. Noncurrent assets include property and equipment, goodwill and other long-term assets. Our flight equipment is registered in the U.S. and is included as U.S. assets; however, many of our aircraft operate internationally.

[2] Prior year amounts have been revised to conform to the current year presentation.

[3] Includes TNT Express integration expenses and restructuring charges of $388 million. These expenses are included in “Corporate, other and eliminations” and the FedEx Express segment. Also includes business realignment costs of $320 million and costs incurred in connection with the settlement of a legal matter involving FedEx Ground of $46 million.

[4] Includes TNT Express integration expenses and restructuring charges of $477 million. These expenses are included in “Corporate, other and eliminations” and the FedEx Express segment. Also includes goodwill and other asset impairment charges of $380 million.

[5] Includes TNT Express integration expenses and restructuring charges of $327 million. These expenses are included in “Corporate, other and eliminations” and the FedEx Express segment. Also includes $39 million of charges for legal reserves related to certain U.S. Customs and Border Protection (“CBP”) matters involving FedEx Logistics and $22 million of charges in connection with the settlement of and certain expected losses relating to independent contractor litigation matters at FedEx Ground.