Stock Based Compensation - Restricted Stock Units - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Share Based Compensation
Fair value of restricted stock units vested	$ 3	$ 2
Restricted Stock Units (RSUs) | Minimum
Share Based Compensation
Age and period of service of the participant to be eligible for retirement	75 years
Restricted Stock Units (RSUs) | Employees
Share Based Compensation
Award vesting period	3 years
Restricted Stock Units (RSUs) | Directors
Share Based Compensation
Award vesting period	1 year