Employee Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
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	$ 72	$ 87	$ 95
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	6.00%	6.50%
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	1
Defined benefit plan effect of one hundred basis point decrease in discount rate	4
Defined benefit plan effect of one hundred basis point decrease in expected long term rate of return	35
Expected annual pension contributions	54
Pension | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Unfunded benefit obligations	(74)	$ (14)
Net benefit expense (less than)	$ 15	$ (10)	$ 13
Defined benefit plan maximum period for calculating unreduced benefits	44 years
Discount rate	5.40%	5.57%
Expected return on assets	6.00%	6.50%	6.25%
Pension | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Unfunded benefit obligations	$ 1	$ 43
Net benefit expense (less than)	$ 15	$ 19	$ 20
Discount rate	3.58%	2.87%
Expected return on assets	3.25%	2.77%	2.67%
Pension | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation to total projected benefit obligations	49.00%	50.00%
Defined benefit plan, weighted-average discount rate	2.72%	1.81%
Expected return on assets	2.79%	1.85%
Plan assets. actual allocation percentage	66.00%	66.00%
Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Unfunded benefit obligations	$ 106	$ 117
Net benefit expense (less than)	$ 1	$ 1