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Legal Matters and Contingencies - Additional Information (Detail) (Directorate of Defense Trade Controls (DDTC), USD $)
In Millions, unless otherwise specified
 9 Months Ended 1 Months Ended
Jul. 26, 2013
Aug. 15, 2013
Subsequent Event
Loss Contingencies [Line Items]    
Penalty $ 10 $ 20
Penalties eligible for offset   $ 10