Benefit Plans Benefit Plans (Detail 5) (Details) - Pension Plan [Member]	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.11%	3.49%
Defined Benefit Plan, Assumptions Used Calculating the projected benefit obligation, Expected Long-term Return on Assets	6.50%	6.50%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.22%	0.97%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	0.87%	0.87%
Defined Benefit Plan, Assumptions Used Calculating the projected benefit obligation, Expected Long-term Return on Assets	3.84%	3.86%