Quarterly report pursuant to Section 13 or 15(d)

Restructuring - Additional Information (Detail)

v2.4.0.6
Restructuring - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
May 31, 2012
May 31, 2011
May 31, 2012
May 31, 2011
Aug. 31, 2011
Restructuring Cost and Reserve [Line Items]          
Subsequent restructuring costs $ 0.5 $ 0.9 $ 2.0 $ 1.7  
Restructuring reserve $ 3.5   $ 3.5   $ 3.6