Employee Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, maximum annual contributions per employee, percent	6.00%
Employer matching contribution, percent of employees' gross pay	100.00%
Employer matching contribution, actual matching percentage of participant's contribution	6.00%
Additional employer matching contribution, actual matching percentage of participant's contribution	3.00%
Defined contribution plan, pre-tax expense	$ 176	$ 183	$ 188
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	4.65%	5.15%
Plan assets. actual allocation percentage	100.00%	100.00%
Non-US 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	$ 39
Defined benefit plan effect of one hundred basis point decrease in discount rate	2
Defined benefit plan effect of one hundred basis point decrease in expected long term rate of return	39
Expected annual pension contributions	58
Defined Benefit Plan Effect Of One Hundred Basis Point Increase In Discount Rate	$ 17
Pension | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan maximum period for calculating unreduced benefits	44 years
Discount rate	5.22%	2.75%
Expected return on assets	4.65%	5.15%	5.55%
Pension | Aig Japan Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Percentage of projected benefit obligation to total projected benefit obligations	54.00%	50.00%
Defined benefit plan, weighted-average discount rate	1.12%	0.52%
Expected return on assets	1.86%	1.85%
Plan assets. actual allocation percentage	65.00%	61.00%
Pension | Non-US Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.51%	1.09%
Expected return on assets	1.84%	2.23%	2.32%
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	5.19%	2.87%
Expected return on assets	2.78%
Postretirement benefit plans | Non-US Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.23%	2.89%
Postretirement Health Coverage | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan requisite service period	5 years