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Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances $ 197 $ 265 $ 568 $ 709
Sales (45) (123) (188) (134)
Maturities (76) (24) (284) (355)
Settlements 1 10 28 30
Calls   (54) (19) (118)
Total 77 74 105 132
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 93 144 287 521
Sales (3) (17) (24) (74)
Maturities   (13) (15) (86)
Settlements (30) (9) (80) (41)
Calls   (54) (18) (118)
Total 60 51 150 202
ABS [Member] | Fixed Maturity AFS Securities [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 13   13  
Total 13   13  
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 (4) (2) (12) (9)
Calls     (1)  
Total (4) (2) (13) (9)
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 30 79 139 110
Settlements (15) (34) (22) (41)
Total 15 45 117 69
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       (5)
Total       (5)
Equity AFS Securities [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 33   43  
Sales (14)   (40) (5)
Total 19   3 (5)
Trading Securities [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances   8   14
Settlements       (4)
Total   8   10
Derivative Investments [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 52 45 140 124
Sales (28) (106) (124) (50)
Maturities (76) (11) (269) (269)
Total (52) (72) (253) (195)
Indexed Annuity and IUL Contracts [Member] | Future contract benefits [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances (24) (11) (54) (60)
Settlements 50 55 142 125
Total $ 26 $ 44 $ 88 $ 65