Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Consolidated Condensed Balance Sheets [Abstract]
Allowances, accounts receivable	$ 3	$ 2
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10	10
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	600	600
Common stock, shares issued	175	175
Common stock, shares outstanding	130	132
Treasury stock, shares	45	43