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INVESTMENTS (AVAILABLE FOR SALE SECURITIES) (DETAILS) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]      
Fair Value $ 2,026 $ 1,967  
Available For Sale Securities Debt Maturities Amortized Cost [Abstract]      
Due in one year or less, Amortized Cost 346    
Due in years two through five, Amortized Cost 516    
Due in years six through ten, Amortized Cost 660    
Due after ten years, Amortized Cost 164    
Subtotal 1,686    
Debt Maturities, Amortized Cost Basis 1,771    
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]      
Due in one year or less, Fair Value 356    
Due in years two through five, Fair Value 568    
Due in years six through ten, Fair Value 761    
Due after ten years, Fair Value 177    
Subtotal 1,862    
Available For Sale Securities, Debt Maturities, Fair Value 1,928    
Available For Sale Fixed Maturities Proceeds Gross Gains And Gross Losses From Sales And Other Than Temporary Impairments [Abstract]      
Proceeds from sales 13 20 88
Gross gains on sales 2 1 4
Gross losses on sales 0 1 2
Total other-than-temporary impairment losses (7) (2) (56)
Portion of loss recognized in other comprehensive income (loss) 0 0 2
Credit losses recognized in earnings (loss) (7) (2) (54)
Fixed Maturities - Credit Loss Impairments      
Balance beginning of period (74) (83)  
Previously recognized impairments on securities that matured, paid, prepaid or sold 9 11  
Recognized impairments on securities impaired to fair value this period 0 0  
Impairments recognized this period on securities not previously impaired (6) (2)  
Additional impairments this period on securities previously impaired (1) 0  
Increases due to passage of time on previously recorded credit losses 0 0  
Accretion of previously recognized impairments due to increases in expected cash flows 0 0  
Balances at December 31, (72) (74) (83)
Corporate [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 1,553 1,554  
Gross Unrealized Gains 167 147  
Gross Unrealized Losses 1 8  
Fair Value 1,719 1,693  
OTTI in AOCI (3) 0 0  
US Treasury Government And Agency [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 106 99  
Gross Unrealized Gains 7 6  
Gross Unrealized Losses 0 0  
Fair Value 113 105  
OTTI in AOCI (3) 0 0  
State and Political Sub-divisions [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 25 21  
Gross Unrealized Gains 3 1  
Gross Unrealized Losses 0 0  
Fair Value 28 22  
OTTI in AOCI (3) 0 0  
Foreign Govts [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 2 4  
Gross Unrealized Gains 0 0  
Gross Unrealized Losses 0 0  
Fair Value 2 4  
OTTI in AOCI (3) 0 0  
Commercial Mortgage-backed [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 57 63  
Gross Unrealized Gains 5 0  
Gross Unrealized Losses 27 34  
Fair Value 35 29  
OTTI in AOCI (3) 2 2  
Available For Sale Securities Debt Maturities Amortized Cost [Abstract]      
AFS without a single maturity date, amortized cost 57    
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]      
AFS without a single maturity date, Fair Value 35    
Residential Mortgage-backed [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 19 26  
Gross Unrealized Gains 1 2  
Gross Unrealized Losses 0 0  
Fair Value 20 28  
OTTI in AOCI (3) 0 0  
Available For Sale Securities Debt Maturities Amortized Cost [Abstract]      
AFS without a single maturity date, amortized cost 19    
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]      
AFS without a single maturity date, Fair Value 20    
Asset-backed [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 9 9  
Gross Unrealized Gains 2 1  
Gross Unrealized Losses 0 0  
Fair Value 11 10  
OTTI in AOCI (3) 0 0  
Available For Sale Securities Debt Maturities Amortized Cost [Abstract]      
AFS without a single maturity date, amortized cost 9    
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]      
AFS without a single maturity date, Fair Value 11    
Redeemable preferred stock [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 97 81  
Gross Unrealized Gains 2 0  
Gross Unrealized Losses 1 5  
Fair Value 98 76  
OTTI in AOCI (3) 0 0  
Fixed Maturities [Member]
     
Schedule of Available-for-sale Securities [Line Items]      
Amortized Cost 1,868 1,857  
Gross Unrealized Gains 187 157  
Gross Unrealized Losses 29 47  
Fair Value 2,026 1,967  
OTTI in AOCI (3) $ 2 $ 2