Insurance Liabilities - Income Statement Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	$ 2,629	$ 2,386
Interest Accretion	598	518
Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	258	309
Interest Accretion	39	29
General Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	110	95
Interest Accretion	2	1
Individual Retirement
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	39	75
Interest Accretion	16	12
Group Retirement
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	5	6
Interest Accretion	3	3
Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	618	575
Interest Accretion	119	118
Life Insurance | Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	248	299
Interest Accretion	38	28
Institutional Markets
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	1,805	1,581
Interest Accretion	217	139
Other
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	52	54
Interest Accretion	241	245
Other | Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premiums	10	10
Interest Accretion	$ 1	$ 1