Employee Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Retirement Benefits [Abstract]
Service cost	$ 0	$ 1
Interest cost	18	12
Expected return on assets	(25)	(22)
Amortization of prior service credit / actuarial loss	1	3
Net periodic benefit cost	$ (6)	$ (6)