Employee Benefit Plans (Assumptions in Determining Net Periodic Benefit Costs) (Details) - U.S.	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	4.35%	3.65%	4.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate	4.01%	4.13%	5.46%
Weighted average expected rate of return on plan assets	5.75%	5.75%	6.00%
Pension Benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	2.25%	2.25%	2.25%
Pension Benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	8.50%	8.50%	8.50%
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	4.35%	3.70%	4.45%
Weighted average expected rate of return on plan assets	5.04%	5.11%	5.36%