Income Taxes (Computation Of Income Tax Expense (Benefit)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Statutory income tax provision expense/(benefit)	$ (691)	$ (177)	$ (613)
State income tax expense/(benefit), net of federal tax effect	(37)	(1)	(41)
Meal expense	8	7	7
Change in valuation allowance	705	121	597
Tax benefit resulting from OCI allocation	0	0	(248)
Other, net	15	15	14
Income tax benefit	$ 0	$ (35)	$ (284)