Employee Benefits - Net Pension Cost (Benefit) for All Funded and Unfunded Plans (Details) - Pension Plans - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost on PBO	$ 6	$ 6	$ 13	$ 12
Expected return on plan assets	(6)	(7)	(13)	(14)
Amortization of losses	3	4	7	9
Settlement loss	0	0	0	0
Net pension cost	$ 3	$ 3	$ 7	$ 7