Employee Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, maximum annual contributions per employee, percent	6.00%
AIG Incentive Saving Plan
Defined Benefit Plan Disclosure [Line Items]
Employer match to employee contribution (as a percent)	100.00%
Employer matching contribution,, percentage of employees' gross pay (as a percent)	6.00%
Additional employer matching contribution, actual matching percentage of participant's contribution (as a percent)	3.00%
Defined contribution plans, costs	$ 163	$ 176	$ 183
Corebridge Financial Inc. Retirement Savings 401(K) Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans, costs	$ 68	$ 76	$ 74
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Shares of common stock included in pension plan assets (in shares)	0	0
Expected return on assets	6.25%	4.65%
Plan assets. actual allocation percentage	100.00%	100.00%
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Shares of common stock included in pension plan assets (in shares)	0	0
Plan assets. actual allocation percentage	100.00%	100.00%
Pension
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan effect of one hundred basis point increase in expected long term rate	$ 38
Defined benefit plan effect of one hundred basis point decrease in discount rate	3
Defined benefit plan effect of one hundred basis point decrease in expected long term rate of return	38
Expected annual pension contributions	59
Defined Benefit Plan Effect Of One Hundred Basis Point Increase In Discount Rate	$ 2
Pension | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan maximum period for calculating unreduced benefits	44 years
Discount rate	4.98%	5.22%
Expected return on assets	6.25%	4.65%	5.15%
Pension | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.85%	2.51%
Expected return on assets	2.67%	1.84%	2.23%
Pension | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation to total projected benefit obligations	54.00%	54.00%
Defined benefit plan, weighted-average discount rate	1.48%	1.12%
Expected return on assets	1.85%	1.86%
Plan assets. actual allocation percentage	67.00%	65.00%
Postretirement benefit plans | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan eligibility age	55 years
Defined benefit plan requisite service period	10 years
Discount rate	4.97%	5.19%
Expected return on assets		2.78%
Postretirement benefit plans | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.37%	5.23%
Postretirement Health Coverage | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan requisite service period	5 years