XML 98 R77.htm IDEA: XBRL DOCUMENT v3.8.0.1
Retirement and Postretirement Plans - Schedule of Asset Allocation for Funded Retirement Plan and Range Asset Category (Details)
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Percentage of Plan Assets at Year End   100.00%
Equity Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Percentage of Plan Assets at Year End   37.00%
Equity Securities [Member] | Scenario, Forecast [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Asset Allocation 40.00%  
Fixed Income Securities/Cash [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Percentage of Plan Assets at Year End   62.00%
Fixed Income Securities/Cash [Member] | Scenario, Forecast [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Asset Allocation 60.00%  
Other {Member]    
Defined Benefit Plan Disclosure [Line Items]    
Percentage of Plan Assets at Year End   1.00%