Annual report [Section 13 and 15(d), not S-K Item 405]

BENEFIT PLANS - Fair Value of Pension Assets (Details)

v3.25.4
BENEFIT PLANS - Fair Value of Pension Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   $ 263.1  
Private Equity Commitments      
Defined Benefit Plan Disclosure [Line Items]      
Commitments related to investments $ 7.7 10.0  
Real Asset Commitments      
Defined Benefit Plan Disclosure [Line Items]      
Commitments related to investments 0.2 0.2  
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 329.5 331.9 $ 363.5
Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 329.5 331.9  
U.S. Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   34.2  
International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   14.3  
Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   193.0  
Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   13.3  
Real Assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   4.5  
Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   3.8  
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 255.0    
Fair Value, Inputs, Level 1, Level 2, and Level 3 | U.S. Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 40.1    
Fair Value, Inputs, Level 1, Level 2, and Level 3 | International Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19.1    
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Fixed Income | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 169.7    
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Private Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12.5    
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Real Assets | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3.4    
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Cash | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10.2    
Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   3.8  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10.2    
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Quoted Prices in Active Markets for Identical Assets (Level 1) | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Quoted Prices in Active Markets for Identical Assets (Level 1) | International Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Quoted Prices in Active Markets for Identical Assets (Level 1) | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Private Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Quoted Prices in Active Markets for Identical Assets (Level 1) | Real Assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Real Assets | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   3.8  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 10.2    
Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   241.5  
Significant Other Observable Inputs (Level 2) | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 228.9    
Significant Other Observable Inputs (Level 2) | U.S. Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   34.2  
Significant Other Observable Inputs (Level 2) | U.S. Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 40.1    
Significant Other Observable Inputs (Level 2) | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   14.3  
Significant Other Observable Inputs (Level 2) | International Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 19.1    
Significant Other Observable Inputs (Level 2) | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   193.0  
Significant Other Observable Inputs (Level 2) | Fixed Income | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 169.7    
Significant Other Observable Inputs (Level 2) | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Significant Other Observable Inputs (Level 2) | Private Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Significant Other Observable Inputs (Level 2) | Real Assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Significant Other Observable Inputs (Level 2) | Real Assets | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Significant Other Observable Inputs (Level 2) | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Significant Other Observable Inputs (Level 2) | Cash | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   17.8  
Significant Unobservable Inputs (Level 3) | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15.9    
Significant Unobservable Inputs (Level 3) | U.S. Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Significant Unobservable Inputs (Level 3) | U.S. Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Significant Unobservable Inputs (Level 3) | International Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Significant Unobservable Inputs (Level 3) | International Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Significant Unobservable Inputs (Level 3) | Fixed Income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Significant Unobservable Inputs (Level 3) | Fixed Income | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Significant Unobservable Inputs (Level 3) | Private Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12.5 13.3 13.8
Significant Unobservable Inputs (Level 3) | Private Equity | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 12.5    
Significant Unobservable Inputs (Level 3) | Real Assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3.4 4.5 $ 4.8
Significant Unobservable Inputs (Level 3) | Real Assets | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3.4    
Significant Unobservable Inputs (Level 3) | Cash      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   0.0  
Significant Unobservable Inputs (Level 3) | Cash | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0    
Investments measured at net asset value | Pension Benefits | Fair Value      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 74.5 $ 68.8