Derivative and Financial Instruments (Notional Amounts of Outstanding Derivative Contracts) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2012
Foreign Exchange Contract [Member]
Notional amount, foreign currency derivatives	$ 365	$ 383
Coffee Contracts [Member]
Notional amount, other derivatives	74	125
Dairy Contracts [Member]
Notional amount, other derivatives	48	72
Diesel Contracts [Member]
Notional amount, other derivatives	$ 6	$ 24