Employee Benefit Plans (Net Periodic Defined Benefit Pension And Other Postretirement Benefit Costs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 1	$ 3	$ 2
Interest cost	1	2	3	4
Expected return on plan assets	(2)	(2)	(4)	(4)
Amortization of prior service credit
Amortization of actuarial loss	1		1
Curtailment/settlement loss (gain)	1		1
Net periodic benefit cost	3	1	4	2
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	3	3
Interest cost	2	2	5	4
Expected return on plan assets	(3)	(3)	(6)	(6)
Amortization of prior service credit
Amortization of actuarial loss		1	1	2
Curtailment/settlement loss (gain)	1		1	(1)
Net periodic benefit cost	2	2	4	2
U.S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1		1
Interest cost		1	1	2
Expected return on plan assets
Amortization of prior service credit	(1)	(1)	(2)	(2)
Amortization of actuarial loss
Curtailment/settlement loss (gain)	(1)		(1)
Net periodic benefit cost	(2)	1	(2)	1
Foreign Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Interest cost
Expected return on plan assets
Amortization of prior service credit
Amortization of actuarial loss
Curtailment/settlement loss (gain)
Net periodic benefit cost