Investments - Fair Value and Gross Unrealized Losses in a Continuous Unrealized Loss Position (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Fair Value
Less Than or Equal to Twelve Months	$ 21,106	$ 16,851
Greater Than Twelve Months	35,528	43,082
Total	56,634	59,933
Gross Unrealized Losses
Less Than or Equal to Twelve Months	1,524	1,999
Greater Than Twelve Months	6,262	4,967
Total	$ 7,786	$ 6,966
Total number of fixed maturity AFS securities in an unrealized loss position | security	6,645,000,000	7,167,000,000
Unrealized holding losses arising during the period	$ 23	$ 7
Corporate bonds
Fair Value
Less Than or Equal to Twelve Months	16,388	13,439
Greater Than Twelve Months	29,045	33,285
Total	45,433	46,724
Gross Unrealized Losses
Less Than or Equal to Twelve Months	1,290	1,744
Greater Than Twelve Months	5,414	4,013
Total	6,704	5,757
U.S. government bonds
Fair Value
Less Than or Equal to Twelve Months	85	65
Greater Than Twelve Months	224	194
Total	309	259
Gross Unrealized Losses
Less Than or Equal to Twelve Months	3	6
Greater Than Twelve Months	37	22
Total	40	28
State and municipal bonds
Fair Value
Less Than or Equal to Twelve Months	652	371
Greater Than Twelve Months	721	814
Total	1,373	1,185
Gross Unrealized Losses
Less Than or Equal to Twelve Months	61	72
Greater Than Twelve Months	209	158
Total	270	230
Foreign government bonds
Fair Value
Less Than or Equal to Twelve Months	29	108
Greater Than Twelve Months	118	57
Total	147	165
Gross Unrealized Losses
Less Than or Equal to Twelve Months	5	31
Greater Than Twelve Months	51	15
Total	56	46
RMBS
Fair Value
Less Than or Equal to Twelve Months	658	355
Greater Than Twelve Months	724	840
Total	1,382	1,195
Gross Unrealized Losses
Less Than or Equal to Twelve Months	29	20
Greater Than Twelve Months	133	118
Total	162	138
CMBS
Fair Value
Less Than or Equal to Twelve Months	475	583
Greater Than Twelve Months	777	586
Total	1,252	1,169
Gross Unrealized Losses
Less Than or Equal to Twelve Months	29	56
Greater Than Twelve Months	106	125
Total	135	181
ABS
Fair Value
Less Than or Equal to Twelve Months	2,801	1,898
Greater Than Twelve Months	3,826	7,212
Total	6,627	9,110
Gross Unrealized Losses
Less Than or Equal to Twelve Months	106	68
Greater Than Twelve Months	303	503
Total	409	571
Hybrid and redeemable preferred securities
Fair Value
Less Than or Equal to Twelve Months	18	32
Greater Than Twelve Months	93	94
Total	111	126
Gross Unrealized Losses
Less Than or Equal to Twelve Months	1	2
Greater Than Twelve Months	9	13
Total	$ 10	$ 15