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Employee Benefit Plans (Target and Actual Asset Allocation for Pension Plan by Asset Category) (Details) - Employee Pension Plans [Member] | Dec. 31, 2018 | Dec. 31, 2017
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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 [Member] |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 5.00% |
Actual asset allocation (as a percent) | 3.00% | 3.00%
Domestic Equity Funds |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 45.00% |
Actual asset allocation (as a percent) | 50.00% | 41.00%
International Equity Funds |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 20.00% |
Actual asset allocation (as a percent) | 27.00% | 31.00%
Fixed Income Funds |  |
Pension Plan Assets |  |
Target asset allocation (as a percent) | 30.00% |
Actual asset allocation (as a percent) | 20.00% | 25.00%

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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