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Accounts Payable, Accrued Liabilities and Other Liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Sep. 30, 2013
Payables and Accruals [Abstract]    
Accounts payable $ 351 $ 398
Accrued employee compensation 48 41
Other accrued liabilities 113 95
Total $ 512 $ 534