Pension Plans (Schedule of Weighted Average Assumptions Used to Determine Pension Benefit Obligations) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Cash balance interest crediting rate	3.50%	3.50%	3.50%
Pension Plans [Member] | US [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	4.75%
Pension Plans [Member] | Qualified Plan [Member] | US [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.50%	3.88%	4.25%
Discount rate	3.88%	4.25%	4.88%
Expected return on plan assets	4.75%	5.00%	5.25%
Cash balance interest crediting rate	3.50%	3.50%	3.50%
Pension Plans [Member] | Nonqualified Plan | US [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.50%	3.88%	4.25%
Discount rate	3.88%	4.25%	4.75%