Consolidated Statements of Changes in Equity (Unaudited) (USD $) In Millions, except Share data	Total	Common Stock	Additional Paid-in Capital [Member]	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2012	$ 4,303	$ 1,386	$ 1,810	$ 1,129	$ (22)
Beginning Balance, shares at Dec. 31, 2012	138,632,324	138,632,000
Net Income	116			116
Dividends declared on common stock	(85)			(85)
Ending Balance at Mar. 31, 2013	$ 4,334	$ 1,386	$ 1,810	$ 1,160	$ (22)
Ending Balance, shares at Mar. 31, 2013	138,632,324	138,632,000