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Additional Financial Information - Components of Receivables, Net (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Jun. 30, 2014
Receivables [Abstract]    
Receivables $ 1,658 $ 1,563
Allowances for returns and doubtful accounts (247) (175)
Receivables, net $ 1,411 $ 1,388