v3.26.1
Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Investments $ 18.7 $ 17.2
Derivative assets 0.3  
Total assets 19.0 17.2
Liabilities:    
Derivative liabilities 0.4 1.4
Investments—guaranteed income fund    
Assets:    
Investments 0.9 0.9
Investments—mutual funds and other    
Assets:    
Investments 17.8 16.3
Total investments    
Assets:    
Investments 18.7  
Quoted Prices in Active Markets (Level 1)    
Assets:    
Derivative assets 0.0  
Total assets 17.8 16.3
Liabilities:    
Derivative liabilities 0.0 0.0
Quoted Prices in Active Markets (Level 1) | Investments—guaranteed income fund    
Assets:    
Investments 0.0 0.0
Quoted Prices in Active Markets (Level 1) | Investments—mutual funds and other    
Assets:    
Investments 17.8 16.3
Quoted Prices in Active Markets (Level 1) | Total investments    
Assets:    
Investments 17.8  
Significant Other Observable Inputs (Level 2)    
Assets:    
Derivative assets 0.3  
Total assets 0.3 0.0
Liabilities:    
Derivative liabilities 0.4 1.4
Significant Other Observable Inputs (Level 2) | Investments—guaranteed income fund    
Assets:    
Investments 0.0 0.0
Significant Other Observable Inputs (Level 2) | Investments—mutual funds and other    
Assets:    
Investments 0.0 0.0
Significant Other Observable Inputs (Level 2) | Total investments    
Assets:    
Investments 0.0  
Significant Unobservable Inputs (Level 3)    
Assets:    
Derivative assets 0.0  
Total assets 0.9 0.9
Liabilities:    
Derivative liabilities 0.0 0.0
Significant Unobservable Inputs (Level 3) | Investments—guaranteed income fund    
Assets:    
Investments 0.9 0.9
Significant Unobservable Inputs (Level 3) | Investments—mutual funds and other    
Assets:    
Investments 0.0 $ 0.0
Significant Unobservable Inputs (Level 3) | Total investments    
Assets:    
Investments $ 0.9