Employee Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2012

Employee Benefit Plans [Abstract]

Net Periodic Defined Benefit Pension And Other Postretirement Benefit Costs

	Three Months Ended March 31
	2012						2011						2012					2011
	Pension Benefits												Postretirement Benefits
	U.S.			Foreign			U.S.			Foreign			U.S.			Foreign		U.S.			Foreign
	(Dollars in millions)
Service cost	$	2		$	2		$	1		$	2		$	—		$	—	$	1		$	—
Interest cost		1			2			2			2			—			—		1			—
Expected return on plan assets		(2	)		(3	)		(2	)		(3	)		—			—		—			—
Amortization of prior service credit		—			—			—			—			(1	)		—		(1	)		—
Amortization of actuarial loss		1			—			—			1			—			—		—			—
Curtailment/settlement loss (gain)		1			1			—			—			(1	)		—		—			—
Net periodic benefit cost	$	3		$	2		$	1		$	2		$	(2	)	$	—	$	1		$	—
	Six Months Ended March 31
	2012						2011						2012					2011
	Pension Benefits												Postretirement Benefits
	U.S.			Foreign			U.S.			Foreign			U.S.			Foreign		U.S.			Foreign
	(Dollars in millions)
Service cost	$	3		$	3		$	2		$	3		$	—		$	—	$	1		$	—
Interest cost		3			5			4			4			1			—		2			—
Expected return on plan assets		(4	)		(6	)		(4	)		(6	)		—			—		—			—
Amortization of prior service credit		—			—			—			—			(2	)		—		(2	)		—
Amortization of actuarial loss		1			1			—			2			—			—		—			—
Curtailment/settlement loss (gain)		1			1			—			(1	)		(1	)		—		—			—
Net periodic benefit cost	$	4		$	4		$	2		$	2		$	(2	)	$	—	$	1		$	—