Benefit Plans (Components of net periodic cost (benefit)) (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ 17	$ 15	$ 50	$ 46
Expected return on plan assets	(38)	(38)	(114)	(115)
Amortization of net actuarial (gain) loss	8	12	23	35
Settlement loss	0	0	0	1
Total net periodic pension cost (benefit)	$ (13)	$ (11)	$ (41)	$ (33)