Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 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	$ 7,452	$ 313
Greater Than Twelve Months	1,100	138
Continuous Unrealized Loss Position, Total	8,552	451
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	70,723	16,786
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,711	1,973
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ 75,434	$ 18,759
Total number of fixed maturity AFS securities in an unrealized loss position | security	7,122	2,597
Unrealized holding gains (losses) arising during the period	$ 5	$ 8
Corporate Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	6,369	234
Greater Than Twelve Months	905	115
Continuous Unrealized Loss Position, Total	7,274	349
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	58,009	10,796
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	3,162	1,567
Debt Securities, Available-for-Sale, Unrealized Loss Position	61,171	12,363
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	9
Greater Than Twelve Months	5	2
Continuous Unrealized Loss Position, Total	14	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	228	6
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	23	26
Debt Securities, Available-for-Sale, Unrealized Loss Position	251	32
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	299	11
Greater Than Twelve Months	21	1
Continuous Unrealized Loss Position, Total	320	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	1,854	522
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	69	24
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,923	546
Foreign Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	21	3
Greater Than Twelve Months	18	2
Continuous Unrealized Loss Position, Total	39	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	85	61
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	74	56
Debt Securities, Available-for-Sale, Unrealized Loss Position	159	117
RMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	103	3
Greater Than Twelve Months	4	1
Continuous Unrealized Loss Position, Total	107	4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	1,346	262
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	30	22
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,376	284
CMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	110	12
Greater Than Twelve Months	43	2
Continuous Unrealized Loss Position, Total	153	14
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	1,290	446
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	211	37
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,501	483
ABS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	527	49
Greater Than Twelve Months	83	5
Continuous Unrealized Loss Position, Total	610	54
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	7,777	4,646
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,077	165
Debt Securities, Available-for-Sale, Unrealized Loss Position	8,854	4,811
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	14	1
Greater Than Twelve Months	21	10
Continuous Unrealized Loss Position, Total	35	11
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	134	47
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	65	76
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ 199	$ 123