Retirement Benefit Plans (Details 4)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Discount rate for other postretirement plan	5.28%	2.93%
Discount rate for supplemental pension plans	4.98%	2.08%
Minimum [Member] \| Pension Benefit Plans and Other Postretirement Benefit Plan [Member]
Discount rate	5.21%	2.75%
Maximum [Member] \| Pension Benefit Plans and Other Postretirement Benefit Plan [Member]
Discount rate	5.23%	2.81%

Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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