Benefit Plans (Components of Net Periodic Cost (Benefit)) (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ 22	$ 24	$ 44	$ 49
Expected return on plan assets	(29)	(30)	(58)	(60)
Amortization of net actuarial loss	7	9	14	17
Total net periodic pension cost (benefit)	$ 0	$ 3	$ 0	$ 6