Schedule II - Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 78		$ 79		$ 59
Charged to Expense	21		16		4
Charged to Other Accounts	16		7		25
Cumulative Translation Adjustment	1		(1)		0
Other	(12)	[1]	(23)	[1]	(9)	[1]
Balance at End of Period	104		78		79
Allowance for deferred tax assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	28		55		32
Charged to Expense	9		(27)		26
Charged to Other Accounts	0		0		(2)
Cumulative Translation Adjustment	0		0		(1)
Other	0	[1]	0	[1]	0	[1]
Balance at End of Period	$ 37		$ 28		$ 55

[1] Primarily write-offs of uncollectible trade receivable accounts and tax valuation allowances.