Employee Benefit Plans (Net Periodic Defined Benefit Pension and Other Postretirement Benefit Costs) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 4	$ 4
Interest cost	1	1	4	4
Expected return on plan assets	(2)	(2)	(6)	(6)
Amortization of actuarial loss	1		2	1
Net periodic benefit cost	1		4	3
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	7	5
Interest cost	4	3	11	8
Expected return on plan assets	(4)	(3)	(13)	(9)
Amortization of actuarial loss	1	1	3	2
Curtailment loss				1
Net periodic benefit cost	3	3	8	7
U. S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost		1	1	2
Amortization of prior service credit			(2)	(2)
Curtailment loss				(1)
Net periodic benefit cost		1	(1)	(1)
Foreign Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1	1	1
Net periodic benefit cost	$ 1	$ 1	$ 1	$ 1