v3.26.3
Fair Value Measurements (Schedule of Financial Instruments Measured at Fair Value) (Details)
$ in Millions
Sep. 30, 2026
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: $ 131.0
Total Assets at Fair Value 131.0
Corporate debt securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 6.5
Mutual funds  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 123.6
Equity securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.9
Level 1  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 131.0
Total Assets at Fair Value 131.0
Level 1 | Corporate debt securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 6.5
Level 1 | Mutual funds  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 123.6
Level 1 | Equity securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.9
Level 2  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.0
Total Assets at Fair Value 0.0
Level 2 | Corporate debt securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.0
Level 2 | Mutual funds  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.0
Level 2 | Equity securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.0
Level 3  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.0
Total Assets at Fair Value 0.0
Level 3 | Corporate debt securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.0
Level 3 | Mutual funds  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: 0.0
Level 3 | Equity securities  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Marketable securities: $ 0.0