Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Common stock, par value	$ 100	$ 100
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	50,000	50,000
Common stock, shares outstanding	50,000	50,000