Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Total number of fixed maturity AFS securities in an unrealized loss position | security	8,279	8,106
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	$ 26,729	$ 69,198
Greater Than Twelve Months	54,922	11,105
Fair Value - Total	81,651	80,303
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	873	10,013
Greater Than Twelve Months	7,836	2,486
Gross Unrealized Losses - Total	8,709	12,499
Unrealized holding gains (losses) arising during the period	10	6
Corporate Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	21,580	57,656
Greater Than Twelve Months	43,435	6,867
Fair Value - Total	65,015	64,523
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	694	8,684
Greater Than Twelve Months	6,522	1,854
Gross Unrealized Losses - Total	7,216	10,538
U.S. Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	114	236
Greater Than Twelve Months	142	27
Fair Value - Total	256	263
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	8	25
Greater Than Twelve Months	22	6
Gross Unrealized Losses - Total	30	31
State And Municipal Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	558	1,850
Greater Than Twelve Months	1,520	227
Fair Value - Total	2,078	2,077
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	9	414
Greater Than Twelve Months	244	69
Gross Unrealized Losses - Total	253	483
Foreign Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	69	122
Greater Than Twelve Months	118	58
Fair Value - Total	187	180
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	3	18
Greater Than Twelve Months	42	27
Gross Unrealized Losses - Total	45	45
RMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	762	1,337
Greater Than Twelve Months	915	191
Fair Value - Total	1,677	1,528
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	25	160
Greater Than Twelve Months	126	43
Gross Unrealized Losses - Total	151	203
CMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	408	1,224
Greater Than Twelve Months	1,222	312
Fair Value - Total	1,630	1,536
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	15	156
Greater Than Twelve Months	193	88
Gross Unrealized Losses - Total	208	244
ABS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	3,182	6,712
Greater Than Twelve Months	7,446	3,325
Fair Value - Total	10,628	10,037
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	115	551
Greater Than Twelve Months	671	374
Gross Unrealized Losses - Total	786	925
Hybrid And Redeemable Preferred Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	56	61
Greater Than Twelve Months	124	98
Fair Value - Total	180	159
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	4	5
Greater Than Twelve Months	16	25
Gross Unrealized Losses - Total	$ 20	$ 30