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PENSION AND POST-RETIREMENT PLANS - ESTIMATED BENEFIT PAYMENTS (Details)
$ in Millions
Dec. 31, 2025
USD ($)
Pension Benefits  
Estimated future pension benefit payments  
2026 $ 15.5
2027 16.1
2028 16.4
2029 16.5
2030 16.4
2031-2035 82.0
Total remaining future undiscounted payments due to the ILA-PRSSA pension fund 162.9
Post-retirement benefits  
Estimated future pension benefit payments  
2026 0.7
2027 0.7
2028 0.8
2029 0.8
2030 0.8
2031-2035 3.9
Total remaining future undiscounted payments due to the ILA-PRSSA pension fund 7.7
Nonqualified Plan | Pension Benefits  
Estimated future pension benefit payments  
2026 1.2
2027 0.5
2028 0.4
2029 0.5
2030 0.4
2031-2035 3.0
Total remaining future undiscounted payments due to the ILA-PRSSA pension fund $ 6.0