Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) - Fixed Maturity AFS Securities [Member]	12 Months Ended
	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	$ 16,786,000,000	$ 4,808,000,000
Greater Than Twelve Months	1,973,000,000	1,068,000,000
Continuous Unrealized Loss Position, Total	18,759,000,000	5,876,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	313,000,000	117,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	138,000,000	81,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 451,000,000	$ 198,000,000
Total number of fixed maturity AFS securities in an unrealized loss position | security	2,597	802
Unrealized holding gains (losses) arising during the period	$ 8,000,000	$ 1,000,000
Corporate Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	10,796,000,000	3,039,000,000
Greater Than Twelve Months	1,567,000,000	607,000,000
Continuous Unrealized Loss Position, Total	12,363,000,000	3,646,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	234,000,000	92,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	115,000,000	58,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	349,000,000	150,000,000
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	6,000,000	28,000,000
Greater Than Twelve Months	26,000,000
Continuous Unrealized Loss Position, Total	32,000,000	28,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		1,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	2,000,000	1,000,000
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	522,000,000
Greater Than Twelve Months	24,000,000
Continuous Unrealized Loss Position, Total	546,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	11,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	12,000,000
Foreign Government Bonds [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	61,000,000	57,000,000
Greater Than Twelve Months	56,000,000
Continuous Unrealized Loss Position, Total	117,000,000	57,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	3,000,000	1,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	5,000,000	1,000,000
RMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	262,000,000	45,000,000
Greater Than Twelve Months	22,000,000	7,000,000
Continuous Unrealized Loss Position, Total	284,000,000	52,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	3,000,000	1,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	4,000,000	1,000,000
CMBS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	446,000,000
Greater Than Twelve Months	37,000,000
Continuous Unrealized Loss Position, Total	483,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	12,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	14,000,000
ABS [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	4,646,000,000	1,527,000,000
Greater Than Twelve Months	165,000,000	358,000,000
Continuous Unrealized Loss Position, Total	4,811,000,000	1,885,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	49,000,000	9,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	5,000,000	6,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	54,000,000	15,000,000
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		112,000,000
Greater Than Twelve Months		96,000,000
Continuous Unrealized Loss Position, Total		208,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		13,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		17,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position		$ 30,000,000
Preferred Stock [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	47,000,000
Greater Than Twelve Months	76,000,000
Continuous Unrealized Loss Position, Total	123,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	10,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 11,000,000