Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) - Fixed Maturity AFS Securities [Member] $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 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	7,994	8,106
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	$ 52,785	$ 69,198
Greater Than Twelve Months	26,744	11,105
Fair Value - Total	79,529	80,303
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	4,945	10,013
Greater Than Twelve Months	5,670	2,486
Gross Unrealized Losses - Total	10,615	12,499
Unrealized holding gains (losses) arising during the period	15	6
Corporate Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	44,549	57,656
Greater Than Twelve Months	18,823	6,867
Fair Value - Total	63,372	64,523
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	4,372	8,684
Greater Than Twelve Months	4,578	1,854
Gross Unrealized Losses - Total	8,950	10,538
U.S. Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	211	236
Greater Than Twelve Months	40	27
Fair Value - Total	251	263
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	17	25
Greater Than Twelve Months	7	6
Gross Unrealized Losses - Total	24	31
State And Municipal Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	1,077	1,850
Greater Than Twelve Months	843	227
Fair Value - Total	1,920	2,077
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	129	414
Greater Than Twelve Months	251	69
Gross Unrealized Losses - Total	380	483
Foreign Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	41	122
Greater Than Twelve Months	98	58
Fair Value - Total	139	180
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	6	18
Greater Than Twelve Months	37	27
Gross Unrealized Losses - Total	43	45
RMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	1,211	1,337
Greater Than Twelve Months	322	191
Fair Value - Total	1,533	1,528
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	110	160
Greater Than Twelve Months	64	43
Gross Unrealized Losses - Total	174	203
CMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	949	1,224
Greater Than Twelve Months	628	312
Fair Value - Total	1,577	1,536
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	83	156
Greater Than Twelve Months	150	88
Gross Unrealized Losses - Total	233	244
ABS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	4,684	6,712
Greater Than Twelve Months	5,887	3,325
Fair Value - Total	10,571	10,037
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	225	551
Greater Than Twelve Months	559	374
Gross Unrealized Losses - Total	784	925
Hybrid And Redeemable Preferred Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	63	61
Greater Than Twelve Months	103	98
Fair Value - Total	166	159
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	3	5
Greater Than Twelve Months	24	25
Gross Unrealized Losses - Total	$ 27	$ 30