Business Segment Information (Details 3) (USD $) In Millions	12 Months Ended
	May 31, 2011		May 31, 2010		May 31, 2009
FedEx Express Segment [Member]
Entity Wide Information Revenue From External Customer Line Items
U.S. overnight box	$ 6,128		$ 5,602		$ 6,074
U.S. overnight envelope	1,736		1,640		1,855
U.S. deferred	2,805		2,589		2,789
Total domestic package revenue	10,669		9,831		10,718
International Priority (IP)	8,228		7,087		6,978
International domestic	653	[1]	578	[1]	565	[1]
Total package revenue	19,550		17,496		18,261
U.S. freight	2,188		1,980		2,165
International priority freight	1,722		1,303		1,104
International airfreight	283		251		369
Total freight revenue	4,193		3,534		3,638
Other	838	[2]	525	[2]	465	[2]
Total revenue	24,581		21,555		22,364
FedEx Ground Segment [Member]
Entity Wide Information Revenue From External Customer Line Items
Total revenue	8,485		7,439		7,047
FedEx Freight Segment [Member]
Entity Wide Information Revenue From External Customer Line Items
Total revenue	4,911		4,321		4,415
FedEx Services Segment [Member]
Entity Wide Information Revenue From External Customer Line Items
Total revenue	1,684		1,770		1,977
Other and Eliminations [Member]
Entity Wide Information Revenue From External Customer Line Items
Total revenue	(357)		(351)		(306)
Consolidated Total [Member]
Entity Wide Information Revenue From External Customer Line Items
Total revenue	$ 39,304		$ 34,734		$ 35,497

[1] International domestic revenues include our international intra-country domestic express operations.

[2] Other revenues includes FedEx Trade Networks and, beginning in the second quarter of 2010, FedEx SupplyChain Systems.