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Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances $ 235 $ 275 $ 371 $ 445
Sales (70) (75) (239) (107)
Maturities (71) (107) (111) (235)
Settlements (36) 19 26 21
Calls (11) (24) (19) (66)
Total 47 88 28 58
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 131 232 194 377
Sales (19) (47) (20) (58)
Maturities (15) (14) (15) (72)
Settlements (25) (16) (51) (32)
Calls (11) (23) (18) (65)
Total 61 132 90 150
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 (6) (1) (8) (7)
Calls   (1) (1) (1)
Total (6) (2) (9) (8)
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 62 20 109 32
Settlements (5) (3) (7) (8)
Total 57 17 102 24
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)   (5)
Total   (5)   (5)
Equity AFS Securities [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 10   10  
Sales (2) (4) (26) (5)
Total 8 (4) (16) (5)
Trading Securities [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 1 4   6
Settlements       (3)
Total 1 4   3
Derivative Investments [Member]        
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]        
Issuances 47 43 88 79
Sales (49) (19) (193) (39)
Maturities (106) (93) (96) (163)
Total (108) (69) (201) (123)
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 (16) (24) (30) (49)
Maturities 50      
Settlements   39 92 71
Total $ 34 $ 15 $ 62 $ 22