v3.26.1
Fair Value Measures and Disclosures (Details) - Fair Value, Recurring - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Inputs, Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, Fair Value Disclosure $ 48.2 $ 40.1
Investments, Fair Value Disclosure 84.8 91.6
Fair Value, Inputs, Level 1 | Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI 35.2 50.0
Fair Value, Inputs, Level 1 | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale 1.4 1.5
Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, Fair Value Disclosure 0.0 0.0
Investments, Fair Value Disclosure 0.0 0.0
Fair Value, Inputs, Level 2 | Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI 0.0 0.0
Fair Value, Inputs, Level 2 | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale 0.0 0.0
Fair Value, Inputs, Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, Fair Value Disclosure 0.0 0.0
Investments, Fair Value Disclosure 0.0 0.0
Fair Value, Inputs, Level 3 | Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI 0.0 0.0
Fair Value, Inputs, Level 3 | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale 0.0 0.0
Estimate of Fair Value Measurement    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, Fair Value Disclosure 48.2 40.1
Investments, Fair Value Disclosure 84.8 91.6
Estimate of Fair Value Measurement | Equity Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities, FV-NI 35.2 50.0
Estimate of Fair Value Measurement | Debt Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale $ 1.4 $ 1.5