Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Accounts and notes receivable, reserve for doubtful accounts	$ 5	$ 5
Intangible assets accumulated amortization	$ 9	$ 6
Preferred stock, authorized shares	2,000,000	2,000,000
Preferred stock, par value	$ 1	$ 1
Preferred stock, Issued shares	0	0
Preferred stock, Outstanding shares	0	0
Common stock, authorized shares	200,000,000	200,000,000
Common stock, par value	$ 1	$ 1
Common stock, issued shares	63,740,510	63,600,928
Common stock, outstanding shares	63,994,075	63,347,362
Common treasury stock, shares	253,565	253,565