Employee Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
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	$ 87	$ 95	$ 100
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Shares of common stock included in pension plan assets (in shares)	0	0
Long-term strategic asset allocation review period (approximately)	3 years
Expected return on assets	6.50%	6.25%
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	$ 35
Defined benefit plan effect of one hundred basis point increase in discount rate	2
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	35
Expected annual pension contributions	$ 53
Pension | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan maximum period for calculating unreduced benefits	44 years
Discount rate	5.57%	4.98%
Expected return on assets	6.50%	6.25%	4.65%
Pension | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.87%	2.85%
Expected return on assets	2.77%	2.67%	1.84%
Pension | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation to total projected benefit obligations	50.00%	54.00%
Defined benefit plan, weighted-average discount rate	1.81%	1.48%
Expected return on assets	1.85%	1.85%
Plan assets. actual allocation percentage	66.00%	67.00%
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	5.53%	4.97%
Expected return on assets		0.00%
Postretirement benefit plans | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.97%	5.37%
Postretirement Health Coverage | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan requisite service period	5 years