Annual report pursuant to Section 13 and 15(d)

Restructuring Charges, Net (Changes In Restructuring Liability) (Parenthetical) (Detail)

v2.4.0.6
Restructuring Charges, Net (Changes In Restructuring Liability) (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Apr. 30, 2013
Restructuring Cost and Reserve [Line Items]  
Reductions/recoveries $ 1