Benefit Plans (Components of net periodic cost (benefit)) (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ 25	$ 17
Expected return on plan assets	(30)	(38)
Amortization of net actuarial loss	8	7
Total net periodic pension cost (benefit)	$ 3	$ (14)