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Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances $ 265 $ 136 $ 709 $ 327
Sales (123) (45) (134) (41)
Maturities (24) (91) (355) (237)
Settlements 10 13 30 21
Calls (54) (23) (118) (56)
Total 74 (10) 132 14
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 144 51 521 113
Sales (17) (6) (74) (41)
Maturities (13)   (86) (4)
Settlements (9) (9) (41) (40)
Calls (54) (22) (118) (54)
Total 51 14 202 (26)
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Settlements       (1)
Total       (1)
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances   20   50
Total   20   50
RMBS [Member] | Fixed Maturity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Settlements       (2)
Total       (2)
CMBS [Member] | Fixed Maturity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Settlements (2)   (9) (3)
Calls   (1)   (2)
Total (2) (1) (9) (5)
CLOs [Member] | Fixed Maturity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 79 34 110 35
Settlements (34) (5) (41) (17)
Total 45 29 69 18
Hybrid And Redeemable Preferred Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Sales       (11)
Total       (11)
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Sales   (11) (5)  
Total   (11) (5)  
Equity AFS Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances       63
Sales     (5) (5)
Total     (5) 58
Trading Securities [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 8   14  
Sales   (1)   (1)
Settlements   (1) (4) (2)
Total 8 (2) 10 (3)
Derivative Investments [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 45 45 124 119
Sales (106) (27) (50) 17
Maturities (11) (91) (269) (233)
Total (72) (73) (195) (97)
Indexed Annuity and Universal Life Contracts Embedded Derivatives [Member] | Future contract benefits [Member]
       
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances (11) (14) (60) (53)
Settlements 55 28 125 86
Total $ 44 $ 14 $ 65 $ 33