Stock Based Compensation - Restricted Stock Units - Additional Information (Details) - Restricted Stock Units (RSUs) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023
Share Based Compensation
Fair value of restricted stock units vested	$ 2	$ 3
Minimum
Share Based Compensation
Age and period of service of the participant to be eligible for retirement	75 years
Employees
Share Based Compensation
Award vesting period	3 years
Directors
Share Based Compensation
Award vesting period	1 year

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details