Goodwill And Other Intangible Assets (Schedule of Goodwill Balances) (Details) (USD $) In Millions	9 Months Ended
	Jun. 30, 2011
Balance at September 30, 2010	$ 39
Foreign currency translation adjustment and other	2
Balance at June 30, 2011	41
Rubber Blacks Business [Member]
Balance at September 30, 2010	27
Foreign currency translation adjustment and other
Balance at June 30, 2011	27
Fumed Metal Oxides [Member]
Balance at September 30, 2010	11
Foreign currency translation adjustment and other	1
Balance at June 30, 2011	12
Security Materials Business [Member]
Balance at September 30, 2010	1
Foreign currency translation adjustment and other	1
Balance at June 30, 2011	$ 2