Income Taxes Income Taxes (Schedule of Effective Tax Rate Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Income tax provision computed at US federal statutory tax rate	$ 563	$ 112	$ 163
Change in valuation allowance	89	29	7
Equity income and dividends	(44)	(31)	(25)
(Income) expense not resulting in tax impact, net	(33)	(39)	(16)
US tax effect of foreign earnings and dividends	35	42	48
Foreign tax credits	(38)	(187)	(66)
Other foreign tax rate differentials	(55)	(2)	(58)
Legislative changes	(19)	0	0
Tax-deductible interest on foreign equity investments and other related items	11	11	(3)
State income taxes, net of federal benefit	11	4	4
Other, net	(12)	6	(13)
Income tax provision (benefit)	$ 508	$ (55)	$ 41
Effective income tax rate	32.00%	(17.00%)	9.00%
UNITED STATES
Income Taxes [Line Items]
US federal statutory tax rate	35.00%