Retirement Plans (Details 9) (USD $) In Millions	12 Months Ended
May 31, 2011	May 31, 2010
Pension Plans Contributions Abstract
Required U.S. retirement plan contributions	$ 359	$ 353
Voluntary U.S. retirement plan contributions	121	495
Total contributions	$ 480	$ 848

Name:

fdx_VoluntaryRetirementPlanContributionsByEmployer

Namespace Prefix:

fdx

Data Type:

xbrli:monetaryItemType

Balance Type:

debit

Period Type:

duration