Income Taxes (Components of Income Tax Expense (Benefit)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S.	$ 73	$ (728)	$ (52)
State and Local	2	12	7
Foreign	372	348	(71)
Total	447	(368)	(116)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S.	748	1,289	(619)
State and Local	9	41	(7)
Foreign	395	341	680
Total	1,152	1,671	54
Tax expense (benefit)	1,599	1,303	(62)
Income Tax Expense Benefit On Equity In Earnings Of Operating Joint Ventures	79	25	807
Income tax expense (benefit) on discontinued operations	18	48	100
Income Tax Effects Allocated Directly to Equity [Abstract]
Other comprehensive income (loss)	1,312	1,597	3,707
Other Comprehensive Income Excluding Impact Of Accounting Pronouncement			3,352
Income Tax Effects Allocated Directly To Equity Impact On Investment Due To Addition Of Business	0	0	(59)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	(19)	1	22
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle	0	0	355
Total Income Taxes	$ 2,989	$ 2,974	$ 4,515