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Employee Benefit Plans (Target and Actual Asset Allocation for Pension Plan by Asset Category) (Details) - Employee Pension Plans | Dec. 31, 2020 | Dec. 31, 2019
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Pension Plan Assets |  |
Target asset allocation (as a percent) | 100.00% |
Actual asset allocation (as a percent) | 100.00% | 100.00%
Cash |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 5.00% |
Actual asset allocation (as a percent) | 5.00% | 4.00%
Domestic Equity Funds |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 35.00% |
Actual asset allocation (as a percent) | 34.00% | 47.00%
International Equity Funds |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 15.00% |
Actual asset allocation (as a percent) | 17.00% | 18.00%
Fixed income funds |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 45.00% |
Actual asset allocation (as a percent) | 44.00% | 31.00%

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