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Consolidated Statements of Changes in Shareholders Equity and Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
May 31, 2012
May 31, 2011
May 31, 2010
Foreign currency translation adjustment, tax $ 22 $ 24 $ 3
Retirement plans adjustments, tax $ 42 $ 6 $ 61