Investments - Fair Value and Gross Unrealized Losses in a Continuous Unrealized Loss Position (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Fair Value
Less Than or Equal to Twelve Months	$ 16,851	$ 69,198
Greater Than Twelve Months	43,082	11,105
Total	59,933	80,303
Gross Unrealized Losses
Less Than or Equal to Twelve Months	1,999	10,013
Greater Than Twelve Months	4,967	2,486
Total	$ 6,966	$ 12,499
Total number of fixed maturity AFS securities in an unrealized loss position | security	7,167,000,000	8,106,000,000
Unrealized holding losses arising during the period	$ 7	$ 6
Corporate bonds
Fair Value
Less Than or Equal to Twelve Months	13,439	57,656
Greater Than Twelve Months	33,285	6,867
Total	46,724	64,523
Gross Unrealized Losses
Less Than or Equal to Twelve Months	1,744	8,684
Greater Than Twelve Months	4,013	1,854
Total	5,757	10,538
U.S. government bonds
Fair Value
Less Than or Equal to Twelve Months	65	236
Greater Than Twelve Months	194	27
Total	259	263
Gross Unrealized Losses
Less Than or Equal to Twelve Months	6	25
Greater Than Twelve Months	22	6
Total	28	31
State and municipal bonds
Fair Value
Less Than or Equal to Twelve Months	371	1,850
Greater Than Twelve Months	814	227
Total	1,185	2,077
Gross Unrealized Losses
Less Than or Equal to Twelve Months	72	414
Greater Than Twelve Months	158	69
Total	230	483
Foreign government bonds
Fair Value
Less Than or Equal to Twelve Months	108	122
Greater Than Twelve Months	57	58
Total	165	180
Gross Unrealized Losses
Less Than or Equal to Twelve Months	31	18
Greater Than Twelve Months	15	27
Total	46	45
RMBS
Fair Value
Less Than or Equal to Twelve Months	355	1,337
Greater Than Twelve Months	840	191
Total	1,195	1,528
Gross Unrealized Losses
Less Than or Equal to Twelve Months	20	160
Greater Than Twelve Months	118	43
Total	138	203
CMBS
Fair Value
Less Than or Equal to Twelve Months	583	1,224
Greater Than Twelve Months	586	312
Total	1,169	1,536
Gross Unrealized Losses
Less Than or Equal to Twelve Months	56	156
Greater Than Twelve Months	125	88
Total	181	244
ABS
Fair Value
Less Than or Equal to Twelve Months	1,898	6,712
Greater Than Twelve Months	7,212	3,325
Total	9,110	10,037
Gross Unrealized Losses
Less Than or Equal to Twelve Months	68	551
Greater Than Twelve Months	503	374
Total	571	925
Hybrid and redeemable preferred securities
Fair Value
Less Than or Equal to Twelve Months	32	61
Greater Than Twelve Months	94	98
Total	126	159
Gross Unrealized Losses
Less Than or Equal to Twelve Months	2	5
Greater Than Twelve Months	13	25
Total	$ 15	$ 30