Retirement Plans and Other Employee Benefits - Schedule of Projected Benefit Obligation Affected by Interest Crediting Ratings (Details) - Pension Benefits - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 7	$ 8	$ 10
Interest crediting rate	12.25%	12.04%	10.77%

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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