Pensions and Other Postretirement Benefits (Net Periodic Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 7	$ 8
Interest cost	18	17	55	49
Expected return on plan assets	(35)	(38)	(106)	(114)
Amortization of actuarial losses	8	10	25	30
Net periodic benefit income	(6)	(8)	(19)	(27)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3	6	9
Interest cost	4	3	12	10
Amortization of actuarial losses	3	5	9	15
Amortization of prior service credit	(3)	(14)	(8)	(41)
Net periodic benefit income	$ 6	$ (3)	$ 19	$ (7)