Retirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Components of net periodic benefit cost
Interest cost	$ 9	$ 8	$ 17	$ 16
Expected return on plan assets	(8)	(8)	(16)	(16)
Actuarial (gain) loss	3	3	6	6
Net periodic benefit cost	$ 4	$ 3	$ 7	$ 6