XML 82 R63.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investments (Securities Held In Unrealized Loss Position And Insured By Financial Guarantor) (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value $ 2,379 $ 3,457
Gross unrealized losses (164) (229)
Wrapped Securities [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 157  
Gross unrealized losses (40)  
Loss and loss adjustment expense reserves 16 [1]  
Asset-backed [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 192  
Gross unrealized losses (35)  
Asset-backed [Member] | Wrapped Securities [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 125  
Gross unrealized losses (35)  
Loss and loss adjustment expense reserves 16 [1]  
Asset-backed [Member] | Wrapped Securities [Member] | Mbia Corp And National [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 117 [2]  
Gross unrealized losses (33) [2]  
Loss and loss adjustment expense reserves 16 [1],[2]  
Asset-backed [Member] | Wrapped Securities [Member] | Other Insurers [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 8  
Gross unrealized losses (2)  
Loss and loss adjustment expense reserves 0 [1]  
Mortgage-backed [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 530  
Gross unrealized losses (18)  
Mortgage-backed [Member] | Wrapped Securities [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 5  
Gross unrealized losses 0  
Loss and loss adjustment expense reserves 0 [1]  
Mortgage-backed [Member] | Wrapped Securities [Member] | Mbia Corp And National [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 4 [2]  
Gross unrealized losses 0 [2]  
Loss and loss adjustment expense reserves 0 [1],[2]  
Mortgage-backed [Member] | Wrapped Securities [Member] | Other Insurers [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 1  
Gross unrealized losses 0  
Loss and loss adjustment expense reserves 0 [1]  
Corporate Obligations [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 856  
Gross unrealized losses (91)  
Corporate Obligations [Member] | Wrapped Securities [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 6  
Gross unrealized losses (1)  
Loss and loss adjustment expense reserves 0 [1]  
Corporate Obligations [Member] | Wrapped Securities [Member] | Mbia Corp And National [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 0 [2]  
Gross unrealized losses 0 [2]  
Loss and loss adjustment expense reserves 0 [1],[2]  
Corporate Obligations [Member] | Wrapped Securities [Member] | Other Insurers [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 6  
Gross unrealized losses (1)  
Loss and loss adjustment expense reserves 0 [1]  
All Other Securities [Member] | Wrapped Securities [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 21  
Gross unrealized losses (4)  
Loss and loss adjustment expense reserves 0 [1]  
All Other Securities [Member] | Wrapped Securities [Member] | Mbia Corp And National [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 21 [2]  
Gross unrealized losses (4) [2]  
Loss and loss adjustment expense reserves 0 [1],[2]  
All Other Securities [Member] | Wrapped Securities [Member] | Other Insurers [Member]
    
Schedule Of Investments [Line Items]    
Total Available-For-Sale, Fair Value 0  
Gross unrealized losses 0  
Loss and loss adjustment expense reserves $ 0 [1]  
[1]
Insurance loss reserve estimates are based on the proportion of par value owned to the total amount of par value insured.
[2]
Includes investments insured by MBIA Corp. and National.