Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014 security	Dec. 31, 2013 security
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	$ 2,419	$ 18,322
Greater Than Twelve Months	7,274	1,839
Continuous Unrealized Loss Position, Total	9,693	20,161
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	44	1,085
Greater Than Twelve Months	406	324
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	450	1,409
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	812	1,484
Corporate Bonds [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	2,103	16,918
Greater Than Twelve Months	6,451	1,258
Continuous Unrealized Loss Position, Total	8,554	18,176
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	40	1,018
Greater Than Twelve Months	325	229
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	365	1,247
U.S. Government Bonds [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	74	163
Greater Than Twelve Months	77
Continuous Unrealized Loss Position, Total	151	163
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1	14
Greater Than Twelve Months	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	3	14
Foreign Government Bonds [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months		69
Continuous Unrealized Loss Position, Total		69
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		1
RMBS [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	157	488
Greater Than Twelve Months	314	267
Continuous Unrealized Loss Position, Total	471	755
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	3	17
Greater Than Twelve Months	19	24
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	22	41
CMBS [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	3	109
Greater Than Twelve Months	127	43
Continuous Unrealized Loss Position, Total	130	152
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months		7
Greater Than Twelve Months	15	14
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	15	21
CLOs [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	79	136
Greater Than Twelve Months	46	50
Continuous Unrealized Loss Position, Total	125	186
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months		2
Greater Than Twelve Months	3	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	3	7
State And Municipal Bonds [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	3	377
Greater Than Twelve Months	65	24
Continuous Unrealized Loss Position, Total	68	401
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months		20
Greater Than Twelve Months	5	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	5	27
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months		62
Greater Than Twelve Months	194	197
Continuous Unrealized Loss Position, Total	194	259
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months		6
Greater Than Twelve Months	37	45
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	$ 37	$ 51