XML 105 R78.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Retirement Plans (Details 8) (USD $)
In Millions
May 31, 2011
May 31, 2010
Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Abstract    
ABO $ (16,530) [1] $ (14,014) [1]
Fair value of plan assets 15,538 13,263
PBO (17,014) (14,441)
Net funded status (1,476) (1,178)
Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Abstract    
Fair value of plan assets 15,815 13,295
PBO (17,346) (14,484)
Net funded status $ (1,531) $ (1,189)
[1] ABO not used in determination of funded status.