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Benefit Plans, Weighted Average Asset Allocation Percentages (Details) | Dec. 31, 2021 | Dec. 31, 2020
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Weighted average asset allocations [Abstract] |  |
Weighted average asset allocation percentage | 100.00% | 100.00%
Equity Securities [Member] |  |
Weighted average asset allocations [Abstract] |  |
Weighted average asset allocation percentage | 54.20% | 55.80%
Fixed Income Securities [Member] |  |
Weighted average asset allocations [Abstract] |  |
Weighted average asset allocation percentage | 30.60% | 27.80%
Real Estate [Member] |  |
Weighted average asset allocations [Abstract] |  |
Weighted average asset allocation percentage | 0.30% | 0.30%
Other [Member] |  |
Weighted average asset allocations [Abstract] |  |
Weighted average asset allocation percentage | 14.90% | 16.10%

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- Definition Percentage of actual 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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