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, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	$ 8	$ 10	$ 12
Interest crediting rate	12.04%	10.77%	9.07%