Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009
Valuation Allowance [Line Items]
AMT Credit Carryforward	$ 378,000,000	$ 402,000,000
Operating Loss Carryforwards	15,300,000,000
Operating Loss Carryforwards, Expiration Dates	Jan. 01, 2023
Valuation Allowance	177,000,000	10,963,000,000
Income Before Income Taxes	2,527,000,000	1,025,000,000	769,000,000
Income Tax Benefit (Provision)	(8,013,000,000)	16,000,000	(85,000,000)
Non Cash Income Tax Expense Recorded In Other Comprehensive Income				(321,000,000)
Accumulated Other Comprehensive Income Valuation Allowance Net Of Tax	13,000,000	3,100,000,000	2,500,000,000
Income tax expense related to tax allocation	321,000,000
Deferred Income Taxes	1,900,000,000
Unrecognized Tax Benefits	37,000,000	44,000,000	22,000,000
Capital Loss Carryforward [Member]
Valuation Allowance [Line Items]
Valuation Allowance	107,000,000
Valuation Allowance, Operating Loss Carryforwards [Member]
Valuation Allowance [Line Items]
Valuation Allowance	70,000,000
Release of tax valuation allowance [Member]
Valuation Allowance [Line Items]
Income Tax Benefit (Provision)	$ 8,300,000,000