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Restructuring Charges And Asset Impairments (Details 2) (Severance and other employee-related costs [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
Jul. 29, 2012
Severance and other employee-related costs [Member]
 
Restructuring Reserve [Roll Forward]  
Balance Beginning $ 0
Provision for Restructuring 33
Consumption of reserves (6)
Foreign exchange (1)
Balance Ending $ 26