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Benefit Plans, Weighted Average Asset Allocation Percentages (Details)	Dec. 31, 2021	Dec. 31, 2020
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

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