Retirement Plans (Details 1) (USD $) In Millions	12 Months Ended
May 31, 2011	May 31, 2010	May 31, 2009
Pension and Other Postretirement Benefit Expense Abstract
U.S. domestic and international pension plans	$ 543	$ 308	$ 177
U.S. domestic and international defined contribution plans	257	136	237
Postretirement healthcare plans	60	42	57
Retirement plans costs	860	486	471
Pension And Postretirement Healthcare Plans Equity Impact Abstract
Benefit plans adjustments at year-end measurement date, net of tax	$ 350	$ 1,000

- Definition

The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss on assets, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period shall be the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost shall be accrued during the employee's service period).

+ References+ Details