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Income Taxes (Schedule Of Principal Components Of Income Tax Expense) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Income Tax Disclosure [Abstract]      
Current: Federal $ 742 $ 704 $ 750
Current: State and local 59 60 61
Current: Non-U.S. 516 480 466
Deferred: Federal (129) (56) (129)
Deferred: State and local (5) 2 (4)
Deferred: Non-U.S. (19) (60) (53)
Income tax expense $ 1,164 $ 1,130 $ 1,091