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Other Financial Data (Other Liabilities) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Sep. 30, 2013
Other Financial Data [Abstract]    
Pension plans $ 564 $ 539
Deferred income taxes 572 823
Postretirement plans, excluding current portion 233 263
Other 628 688
Total $ 1,997 $ 2,313