Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) $ in Millions	21 Months Ended
	Sep. 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	$ 12,693	$ 313
Greater Than Twelve Months	1,687	138
Continuous Unrealized Loss Position, Total	14,380	451
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	77,639	16,786
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	5,744	1,973
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ 83,383	$ 18,759
Total number of fixed maturity AFS securities in an unrealized loss position | security	8,129	2,597
Unrealized holding gains (losses) arising during the period	$ 8
Corporate Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	10,929	$ 234
Greater Than Twelve Months	1,341	115
Continuous Unrealized Loss Position, Total	12,270	349
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	63,882	10,796
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	3,620	1,567
Debt Securities, Available-for-Sale, Unrealized Loss Position	67,502	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	26
Greater Than Twelve Months	6	2
Continuous Unrealized Loss Position, Total	32	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	269	6
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	22	26
Debt Securities, Available-for-Sale, Unrealized Loss Position	291	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	471	11
Greater Than Twelve Months	40	1
Continuous Unrealized Loss Position, Total	511	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	2,024	522
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	106	24
Debt Securities, Available-for-Sale, Unrealized Loss Position	2,130	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	27	3
Greater Than Twelve Months	28	2
Continuous Unrealized Loss Position, Total	55	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	130	61
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	76	56
Debt Securities, Available-for-Sale, Unrealized Loss Position	206	117
RMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	211	3
Greater Than Twelve Months	8	1
Continuous Unrealized Loss Position, Total	219	4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	1,630	262
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	35	22
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,665	284
CMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	178	12
Greater Than Twelve Months	62	2
Continuous Unrealized Loss Position, Total	240	14
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	1,317	446
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	222	37
Debt Securities, Available-for-Sale, Unrealized Loss Position	1,539	483
ABS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	845	49
Greater Than Twelve Months	178	5
Continuous Unrealized Loss Position, Total	1,023	54
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	8,291	4,646
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,596	165
Debt Securities, Available-for-Sale, Unrealized Loss Position	9,887	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	6	1
Greater Than Twelve Months	24	10
Continuous Unrealized Loss Position, Total	30	11
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	96	47
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	67	76
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ 163	$ 123