Employee Benefit Plans - Net Periodic Defined Benefit Pension and Other Postretirement Benefit Costs (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
U.S. Pension Benefits [Member]
Employee Benefit Plans [Line Items]
Service cost	$ 1	$ 1
Interest cost	2	2
Expected return on plan assets	(3)	(3)
Amortization of actuarial loss		1
Net periodic benefit cost		1
Foreign Pension Benefits [Member]
Employee Benefit Plans [Line Items]
Service cost	2	2
Interest cost	4	4
Expected return on plan assets	(5)	(5)
Amortization of actuarial loss	1	1
Net periodic benefit cost	2	2
U. S. Postretirement Benefits [Member]
Employee Benefit Plans [Line Items]
Interest cost	1	1
Expected return on plan assets		(1)
Amortization of prior service credit	(1)
Foreign Postretirement Benefits [Member]
Employee Benefit Plans [Line Items]
Service cost
Interest cost
Expected return on plan assets
Amortization of prior service credit
Amortization of actuarial loss
Net periodic benefit cost