Retirement Plans and Other Employee Benefits - Schedule Of Components Of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 20	$ 17	$ 24
Expected return on plan assets	(24)	(20)	(26)
Actuarial (gain) loss	12	10	13
Net periodic benefit cost	8	7	11
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1	1
Expected return on plan assets	(2)	(1)	(1)
Actuarial (gain) loss	0	0	0
Net periodic benefit cost	$ (1)	$ 0	$ 0