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
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 53,811	$ 71,770
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	27,025	11,352
Debt Securities, Available-for-Sale, Unrealized Loss Position	80,836	83,122
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	5,272	10,425
Greater Than Twelve Months	5,819	2,593
Continuous Unrealized Loss Position, Total	$ 11,091	$ 13,018
Total number of fixed maturity AFS securities in an unrealized loss position | security	8,065	8,175
Unrealized holding gains (losses) arising during the period	$ 15	$ 6
Corporate Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	45,493	59,929
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	19,086	7,094
Debt Securities, Available-for-Sale, Unrealized Loss Position	64,579	67,023
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	4,662	9,049
Greater Than Twelve Months	4,715	1,955
Continuous Unrealized Loss Position, Total	9,377	11,004
U.S. Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	212	261
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	40	27
Debt Securities, Available-for-Sale, Unrealized Loss Position	252	288
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	18	25
Greater Than Twelve Months	7	6
Continuous Unrealized Loss Position, Total	25	31
State And Municipal Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	1,115	1,958
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	856	237
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,971	2,195
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	148	440
Greater Than Twelve Months	260	72
Continuous Unrealized Loss Position, Total	408	512
Foreign Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	41	130
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	98	58
Debt Securities, Available-for-Sale, Unrealized Loss Position	139	188
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	7	19
Greater Than Twelve Months	37	28
Continuous Unrealized Loss Position, Total	44	47
RMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	1,251	1,490
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	326	193
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,577	1,683
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	126	179
Greater Than Twelve Months	65	43
Continuous Unrealized Loss Position, Total	191	222
CMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	949	1,224
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	628	320
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,577	1,544
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	152	90
Continuous Unrealized Loss Position, Total	235	246
ABS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	4,686	6,715
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	5,888	3,326
Debt Securities, Available-for-Sale, Unrealized Loss Position	10,574	10,041
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	225	552
Greater Than Twelve Months	559	374
Continuous Unrealized Loss Position, Total	784	926
Hybrid And Redeemable Preferred Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	64	63
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	103	97
Debt Securities, Available-for-Sale, Unrealized Loss Position	167	160
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
Continuous Unrealized Loss Position, Total	$ 27	$ 30