Income Taxes (Schedule Of Components Of Income Tax Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense (Benefit) [Abstract]
Federal	$ 153	$ 49	$ (885)
State	65	54	15
Non-U.S.	262	295	156
Total current expense (benefit)	480	398	(714)
Federal	262	134	745
State	26	8	141
Non-U.S.	(63)	76	358
Total deferred expense (benefit)	225	218	1,244
Total income tax expense	$ 705	$ 616	$ 530