Employee Benefit Plans (Definite Benefit Plan, Assumptions, Pension) (Details) - Pension Plan [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Salary scale, benefit obligation	4.30%	4.30%
Salary scale, net cost	4.30%	4.30%	4.30%
Expected return on assets	6.50%	6.80%	6.90%
Interest Crediting Rate, benefit obligation	3.80%	3.80%
Interest Crediting Rate, net cost	3.80%	3.80%	3.80%
PBO [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligation	2.50%	3.10%
Discount rate, net cost	3.20%	4.00%	3.50%
Interest cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, net cost	2.80%	3.70%	3.10%
Other Expense [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, net cost	3.50%	3.70%	3.40%