Pensions and Other Postretirement Benefits (Weighted-Average Assumptions Used to Determine Benefit Obligations) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligation	1.96%	2.61%
Rate of compensation increase, benefit obligation	1.20%	3.08%
Expected return on plan assets, benefit obligation	3.56%	2.70%
Discount rate, net periodic pension cost	2.61%	2.42%
Rate of compensation increase, net periodic pension cost	3.08%	2.66%
Expected return on plan assets, net periodic pension cost	2.70%	3.46%
OPEB Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligation	2.97%	3.99%
Discount rate, net periodic pension cost	3.99%	3.33%
Health care trend rate	5.27%	17.25%