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Additional Financial Information - Components of Receivables, Net (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Receivables [Abstract]    
Receivables $ 1,596 $ 1,510
Allowances for returns and doubtful accounts (170) (175)
Receivables, net $ 1,426 $ 1,335