Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v2.4.0.6
Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended 132 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2015
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2027
Income Taxes [Abstract]                  
Deferred Tax Assets, Net, Current $ (61) $ 0       $ (61) $ 0    
Deferred Tax Liabilities, Current 0 712       0 712    
Deferred Tax Liabilities, Noncurrent 411 0       411 0    
Deferred Tax Assets, Net, Noncurrent 0 (371)       0 (371)    
Deferred Federal Income Tax Expense (Benefit)           19 (721) 65  
Valuation Allowances and Reserves, Period Increase (Decrease)           (21)      
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]                  
Computed expected tax benefit (expense)           (394) (160) (59)  
Disposition of consolidated subsidiaries           0 462 0  
Settlements with taxing authorities           0 211 0  
State and local income taxes, net of federal income taxes           (28) 34 16  
Change in valuation allowance affecting tax expense           (20) 7 9  
Recognition of tax benefits not previously recognized, net           109 0 201  
Other, net           14 4 3  
Income tax benefit (expense) (104) 211 (201)     319 (558) (170)  
Deferred Tax Assets, Capital Loss Carryforwards 118         118      
Net deferred tax liabilities $ 350 $ 341       $ 350 $ 341    
Tax Credit Carryforward, Expiration Dates       68 1       49