RETIREMENT BENEFIT PALNS - Defined Benefit Plan, Assumptions (Details)	12 Months Ended
Dec. 31, 2022 Rate	Dec. 31, 2021
Pension Benefits
Weighted-average assumptions used to determine pension benefit obligation:
Discount rate	5.31%	3.02%
Rate of compensation increase	3.50%	3.50%
Weighted-average assumptions used to determine net periodic pension and postretirement costs:
Discount rate	3.02%	2.88%
Rate of compensation increases	3.50%	3.50%
Average future working lifetime	11 years 3 days	10 years 11 months 4 days
Postretirement Benefits
Weighted-average assumptions used to determine pension benefit obligation:
Discount rate	5.29%	3.00%
Initial healthcare cost trend rate	5.80%
Pre-Med healthcare cost trend rate		10.00%
Medicare healthcare cost trend rate		3.00%
Ultimate healthcare cost trend rate	0.0394	0.0394
Year ultimate healthcare cost trend rate is reached	2075	2075
Weighted-average assumptions used to determine net periodic pension and postretirement costs:
Discount rate	3.00%	2.86%
Average future working lifetime	11 years 3 months 25 days	11 years 4 months 2 days
Initial healthcare cost trend rate	6.00%	6.00%
Ultimate healthcare cost trend rate	3.94%	3.80%
Year ultimate healthcare cost trend rate is reached	2075	2075

Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Initial Healthcare Cost Trend Rate

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Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Initial Healthcare Cost Trend Rate, Medicare Eligible

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Defined Benefit Plan, Average Future Working Lifetime

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

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Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
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Ultimate trend rate for health care cost for defined benefit postretirement plan.

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Year ultimate health care cost trend rate is expected to be reached, in YYYY format.

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