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
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 27,262	$ 71,770
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	55,728	11,352
Debt Securities, Available-for-Sale, Unrealized Loss Position	82,990	83,122
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1,505	10,425
Greater Than Twelve Months	10,135	2,593
Continuous Unrealized Loss Position, Total	$ 11,640	$ 13,018
Total number of fixed maturity AFS securities in an unrealized loss position | security	8,331	8,175
Unrealized holding gains (losses) arising during the period	$ 10	$ 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	22,081	59,929
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	44,158	7,094
Debt Securities, Available-for-Sale, Unrealized Loss Position	66,239	67,023
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1,288	9,049
Greater Than Twelve Months	8,600	1,955
Continuous Unrealized Loss Position, Total	9,888	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	115	261
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	142	27
Debt Securities, Available-for-Sale, Unrealized Loss Position	257	288
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	9	25
Greater Than Twelve Months	21	6
Continuous Unrealized Loss Position, Total	30	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	576	1,958
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,560	237
Debt Securities, Available-for-Sale, Unrealized Loss Position	2,136	2,195
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	25	440
Greater Than Twelve Months	387	72
Continuous Unrealized Loss Position, Total	412	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	72	130
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	118	58
Debt Securities, Available-for-Sale, Unrealized Loss Position	190	188
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	4	19
Greater Than Twelve Months	42	28
Continuous Unrealized Loss Position, Total	46	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	770	1,490
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	955	193
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,725	1,683
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	41	179
Greater Than Twelve Months	165	43
Continuous Unrealized Loss Position, Total	206	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	408	1,224
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,222	320
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,630	1,544
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	18	156
Greater Than Twelve Months	214	90
Continuous Unrealized Loss Position, Total	232	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	3,183	6,715
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	7,449	3,326
Debt Securities, Available-for-Sale, Unrealized Loss Position	10,632	10,041
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	115	552
Greater Than Twelve Months	689	374
Continuous Unrealized Loss Position, Total	804	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	57	63
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	124	97
Debt Securities, Available-for-Sale, Unrealized Loss Position	181	160
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	5	5
Greater Than Twelve Months	17	25
Continuous Unrealized Loss Position, Total	$ 22	$ 30