Employee Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Retirement Benefits [Abstract]
Service cost	$ 1	$ 1	$ 2	$ 3
Interest cost	12	10	36	31
Expected return on assets	(22)	(26)	(65)	(78)
Amortization of prior service credit / actuarial loss	3	5	9	13
Net periodic benefit cost	$ (6)	$ (10)	$ (18)	$ (31)