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	$ 17,427	$ 71,770
Greater Than Twelve Months	44,508	11,352
Total	61,935	83,122
Gross Unrealized Losses
Less Than or Equal to Twelve Months	3,526	10,425
Greater Than Twelve Months	6,241	2,593
Total	$ 9,767	$ 13,018
Total number of fixed maturity AFS securities in an unrealized loss position | security	7,605,000,000	8,175,000,000
Unrealized holding losses arising during the period	$ 8	$ 6
Corporate bonds
Fair Value
Less Than or Equal to Twelve Months	14,005	59,929
Greater Than Twelve Months	34,595	7,094
Total	48,600	67,023
Gross Unrealized Losses
Less Than or Equal to Twelve Months	3,270	9,049
Greater Than Twelve Months	5,002	1,955
Total	8,272	11,004
U.S. government bonds
Fair Value
Less Than or Equal to Twelve Months	65	261
Greater Than Twelve Months	195	27
Total	260	288
Gross Unrealized Losses
Less Than or Equal to Twelve Months	6	25
Greater Than Twelve Months	23	6
Total	29	31
State and municipal bonds
Fair Value
Less Than or Equal to Twelve Months	371	1,958
Greater Than Twelve Months	874	237
Total	1,245	2,195
Gross Unrealized Losses
Less Than or Equal to Twelve Months	72	440
Greater Than Twelve Months	345	72
Total	417	512
Foreign government bonds
Fair Value
Less Than or Equal to Twelve Months	111	130
Greater Than Twelve Months	57	58
Total	168	188
Gross Unrealized Losses
Less Than or Equal to Twelve Months	31	19
Greater Than Twelve Months	16	28
Total	47	47
RMBS
Fair Value
Less Than or Equal to Twelve Months	360	1,490
Greater Than Twelve Months	886	193
Total	1,246	1,683
Gross Unrealized Losses
Less Than or Equal to Twelve Months	20	179
Greater Than Twelve Months	177	43
Total	197	222
CMBS
Fair Value
Less Than or Equal to Twelve Months	583	1,224
Greater Than Twelve Months	589	320
Total	1,172	1,544
Gross Unrealized Losses
Less Than or Equal to Twelve Months	56	156
Greater Than Twelve Months	147	90
Total	203	246
ABS
Fair Value
Less Than or Equal to Twelve Months	1,900	6,715
Greater Than Twelve Months	7,217	3,326
Total	9,117	10,041
Gross Unrealized Losses
Less Than or Equal to Twelve Months	68	552
Greater Than Twelve Months	517	374
Total	585	926
Hybrid and redeemable preferred securities
Fair Value
Less Than or Equal to Twelve Months	32	63
Greater Than Twelve Months	95	97
Total	127	160
Gross Unrealized Losses
Less Than or Equal to Twelve Months	3	5
Greater Than Twelve Months	14	25
Total	$ 17	$ 30