Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) - Fixed Maturity AFS Securities [Member] $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	$ 71,770	$ 16,786
Greater Than Twelve Months	11,352	1,973
Continuous Unrealized Loss Position, Total	83,122	18,759
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	10,425	313
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,593	138
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ 13,018	$ 451
Total number of fixed maturity AFS securities in an unrealized loss position | security	8,175	2,597
Unrealized holding gains (losses) arising during the period	$ 6	$ 8
Corporate Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	59,929	10,796
Greater Than Twelve Months	7,094	1,567
Continuous Unrealized Loss Position, Total	67,023	12,363
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	9,049	234
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,955	115
Debt Securities, Available-for-Sale, Unrealized Loss Position	11,004	349
U.S. Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	261	6
Greater Than Twelve Months	27	26
Continuous Unrealized Loss Position, Total	288	32
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	25
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	6	2
Debt Securities, Available-for-Sale, Unrealized Loss Position	31	2
State And Municipal Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1,958	522
Greater Than Twelve Months	237	24
Continuous Unrealized Loss Position, Total	2,195	546
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	440	11
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	72	1
Debt Securities, Available-for-Sale, Unrealized Loss Position	512	12
Foreign Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	130	61
Greater Than Twelve Months	58	56
Continuous Unrealized Loss Position, Total	188	117
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	19	3
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	28	2
Debt Securities, Available-for-Sale, Unrealized Loss Position	47	5
RMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1,490	262
Greater Than Twelve Months	193	22
Continuous Unrealized Loss Position, Total	1,683	284
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	179	3
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	43	1
Debt Securities, Available-for-Sale, Unrealized Loss Position	222	4
CMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1,224	446
Greater Than Twelve Months	320	37
Continuous Unrealized Loss Position, Total	1,544	483
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	156	12
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	90	2
Debt Securities, Available-for-Sale, Unrealized Loss Position	246	14
ABS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	6,715	4,646
Greater Than Twelve Months	3,326	165
Continuous Unrealized Loss Position, Total	10,041	4,811
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	552	49
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	374	5
Debt Securities, Available-for-Sale, Unrealized Loss Position	926	54
Hybrid And Redeemable Preferred Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months		47
Greater Than Twelve Months		76
Continuous Unrealized Loss Position, Total		123
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months		1
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer		10
Debt Securities, Available-for-Sale, Unrealized Loss Position		$ 11
Preferred Stock [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	63
Greater Than Twelve Months	97
Continuous Unrealized Loss Position, Total	160
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	5
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	25
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ 30