Annual report pursuant to Section 13 and 15(d)

Supplemental Cash Flow Information (Details)

 v2.3.0.11
Supplemental Cash Flow Information (Details) (USD $)
In Millions
12 Months Ended
May 31, 2011
May 31, 2010
May 31, 2009
Supplemental Cash Flow Information (Textuals) [Abstract]      
Income taxes paid $ 255.6 $ 258.0 $ 261.8