Pensions and Other Postretirement Benefits - Pension Plan Weighted-Average Asset Allocations, By Asset Category (Details) - Pension Plan |
Dec. 31, 2020 |
Dec. 31, 2019 |
---|---|---|
Defined Benefit Plan, Information about Plan Assets [Abstract] | ||
Actual plan asset allocations | 100.00% | 100.00% |
Domestic equity securities | ||
Defined Benefit Plan, Information about Plan Assets [Abstract] | ||
Actual plan asset allocations | 52.00% | 50.00% |
International equity securities | ||
Defined Benefit Plan, Information about Plan Assets [Abstract] | ||
Actual plan asset allocations | 24.00% | 24.00% |
Debt securities | ||
Defined Benefit Plan, Information about Plan Assets [Abstract] | ||
Actual plan asset allocations | 22.00% | 24.00% |
Cash and cash equivalents | ||
Defined Benefit Plan, Information about Plan Assets [Abstract] | ||
Actual plan asset allocations | 2.00% | 2.00% |