EMPLOYEE BENEFIT PLANS - Target asset allocation and actual asset allocation (Details)	Dec. 31, 2025	Dec. 31, 2024
EMPLOYEE BENEFIT PLANS
Target Allocation	100.00%	100.00%
Actual Allocation	100.00%	100.00%
Total
EMPLOYEE BENEFIT PLANS
Actual Allocation	33.50%	31.00%
Total \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	10.00%	10.00%
Total \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	50.00%	50.00%
Large cap equity
EMPLOYEE BENEFIT PLANS
Actual Allocation	21.50%	20.80%
Large cap equity \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	10.00%	10.00%
Large cap equity \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	40.00%	40.00%
Small cap equity
EMPLOYEE BENEFIT PLANS
Actual Allocation	5.20%	4.70%
Small cap equity \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
Small cap equity \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	20.00%	20.00%
Developed Markets
EMPLOYEE BENEFIT PLANS
Actual Allocation	4.20%	3.30%
Developed Markets \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
Developed Markets \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	20.00%	20.00%
Emerging Markets
EMPLOYEE BENEFIT PLANS
Actual Allocation	2.60%	2.20%
Emerging Markets \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
Emerging Markets \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	10.00%	10.00%
Total Equity
EMPLOYEE BENEFIT PLANS
Actual Allocation	54.70%	59.10%
Total Equity \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	50.00%	50.00%
Total Equity \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	80.00%	80.00%
Treasury/Agency
EMPLOYEE BENEFIT PLANS
Actual Allocation	25.40%	24.80%
Treasury/Agency \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
Treasury/Agency \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	50.00%	50.00%
Mortgage Backed
EMPLOYEE BENEFIT PLANS
Actual Allocation	14.40%	14.80%
Mortgage Backed \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
Mortgage Backed \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	30.00%	30.00%
Corporate securities
EMPLOYEE BENEFIT PLANS
Actual Allocation	10.40%	12.40%
Corporate securities \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
Corporate securities \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	30.00%	30.00%
International
EMPLOYEE BENEFIT PLANS
Actual Allocation	1.30%	1.70%
International \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
International \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	15.00%	15.00%
High Yield
EMPLOYEE BENEFIT PLANS
Actual Allocation	3.20%	4.40%
High Yield \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
High Yield \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	15.00%	15.00%
Total Cash
EMPLOYEE BENEFIT PLANS
Actual Allocation	11.80%	10.90%
Total Cash \| Minimum
EMPLOYEE BENEFIT PLANS
Target Allocation	0.00%	0.00%
Total Cash \| Maximum
EMPLOYEE BENEFIT PLANS
Target Allocation	15.00%	15.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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