Annual report pursuant to Section 13 and 15(d)

Supplemental Cash Flow Information (Details)

v2.4.0.6
Supplemental Cash Flow Information (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
May 31, 2012
May 31, 2011
May 31, 2010
Supplemental Cash Flow Information (Textual) [Abstract]      
Income taxes paid $ 301.4 $ 255.6 $ 258.0
Lease incentives received $ 11.0 $ 10.5 $ 5.9