Retirement and Postretirement Plans - Schedule of Asset Allocation for Funded Retirement Plan and Range Asset Category (Details) |
Dec. 31, 2018 |
Dec. 31, 2017 |
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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% |