Pension and Other Benefit Programs - Components of Pension Plan Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Interest cost	$ 30	$ 17	$ 14
Estimated return on plan assets	(35)	(21)	(19)
Amortization of loss	0	2	6
Aggregate pension (benefit)/expense	$ (5)	$ (2)	$ 1
Defined benefit plan net periodic benefit cost credit interest cost statement of Income or comprehensive income extensible list not disclosed flag	Interest cost	Interest cost	Interest cost
Defined benefit plan net periodic benefit cost credit expected return loss statement of income or comprehensive income extensible list not disclosed flag	Estimated return on plan assets	Estimated return on plan assets	Estimated return on plan assets