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BENEFIT PLANS: Defined Benefit Plan, Information about Plan Assets, Allocation Percentages (Details) - Pension Plan	Dec. 31, 2025
Defined Benefit Plan Disclosure
Target Allocation Percentage of Assets	100.00%
Actual Plan Asset Allocations	100.00%
Debt Securities
Defined Benefit Plan Disclosure
Target Allocation Percentage of Assets	25.00%
Actual Plan Asset Allocations	25.00%
Equity Securities
Defined Benefit Plan Disclosure
Target Allocation Percentage of Assets	56.00%
Actual Plan Asset Allocations	59.00%
Real Estate
Defined Benefit Plan Disclosure
Target Allocation Percentage of Assets	8.00%
Actual Plan Asset Allocations	8.00%
Other plan assets
Defined Benefit Plan Disclosure
Target Allocation Percentage of Assets	11.00%
Actual Plan Asset Allocations	8.00%

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