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
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]          
Unrecognized Tax Benefits $ 29 $ 34 $ 29 $ 34 $ 158
capital loss from taxable liquidation of consolidated subsidiary, gross     289    
capital loss deferred tax asset     101    
Deferred Tax Assets, Net, Current (13) (61) (13) (61)  
Deferred Tax Liabilities, Current   (61)   (61)  
Deferred Tax Liabilities, Noncurrent 802 409 802 409  
Deferred Tax Assets, Net, Noncurrent   409   409  
Deferred Federal Income Tax Expense (Benefit)     372 33 (734)
Valuation Allowances and Reserves, Period Increase (Decrease)     24    
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]          
Computed expected tax benefit (expense)     (704) (408) (149)
Disposition of consolidated subsidiaries     0 0 462
Settlements with taxing authorities     0 0 211
Taxable liquidation of a consolidated subsidiary     101 0 0
Dividends received deductions     40 9 7
State and local income taxes, net of federal income taxes     (57) (28) 36
Change in valuation allowance affecting tax expense     24 (20) 7
Recognition of tax benefits not previously recognized, net     9 109 0
Other, net     (13) 5 (3)
Income tax benefit (expense) (104) 211 600 333 (571)
Net deferred tax liabilities $ 789 $ 348 $ 789 $ 348