Income Taxes (Schedule Of Income Tax Expense/(Benefit)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. federal	$ (82)	$ 657	$ (605)
Non-U.S.	76	52	93
U.S. state	11	19	(22)
Total Current Income Tax Expense (Benefit)	5	728	(534)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. federal	1,531	1,209	1,856
Non-U.S.	41	(13)	(8)
U.S. state	69	83	68
Total deferred	1,641	1,279	1,916
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Total income tax expense	$ 1,646	$ 2,007	$ 1,382