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Summarized Balance Sheet Data of Company's Nonconsolidated Partially-Owned Affiliates (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Sep. 30, 2012
Equity Method Investments and Joint Ventures [Abstract]    
Current assets $ 3,987 $ 3,339
Noncurrent assets 1,775 1,648
Total assets 5,762 4,987
Current liabilities 3,046 2,501
Noncurrent liabilities 613 553
Shareholders' equity 2,103 1,933
Total liabilities and shareholders' equity $ 5,762 $ 4,987