Employee Benefit Plans (Net Periodic Defined Benefit Pension And Other Postretirement Benefit Costs) (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
U.S. Pension Benefits [Member]
Service cost	$ 5	$ 5	$ 4
Interest cost	6	7	8
Expected return on plan assets	(8)	(9)	(9)
Amortization of prior service cost (credit)
Net losses (gains)			(1)
Settlements or curtailments cost (income)
Other
Net periodic benefit cost	3	3	2
Foreign Pension Benefits [Member]
Service cost	6	5	5
Interest cost	11	11	12
Expected return on plan assets	(13)	(11)	(12)
Amortization of prior service cost (credit)
Net losses (gains)	3	2	1
Settlements or curtailments cost (income)	(1)	1	(1)
Other	2
Net periodic benefit cost	9	8	5
U.S. Postretirement Benefits [Member]
Service cost	1	1	2
Interest cost	2	3	5
Expected return on plan assets
Amortization of prior service cost (credit)	(3)	(4)	(1)
Net losses (gains)
Settlements or curtailments cost (income)			(1)
Other
Net periodic benefit cost			5
Foreign Postretirement Benefits [Member]
Service cost
Interest cost	1	1	1
Expected return on plan assets
Amortization of prior service cost (credit)
Net losses (gains)
Settlements or curtailments cost (income)		(1)
Other
Net periodic benefit cost	$ 1	$ 1	$ 1