v3.25.4
Fair Value Measurements (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Sep. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Deferred Compensation Investment $ 19.9 $ 19.1
Derivative Asset 3.8 4.0
Equity securities 10.6 41.0
Assets, Fair Value Disclosure 34.3 64.1
Deferred Compensation Liabilities 47.3 49.0
Derivative Liability 10.6 9.7
Liabilities, Fair Value Disclosure 57.9 58.7
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Deferred Compensation Investment 19.9 19.1
Derivative Asset 0.0 0.0
Equity securities 10.6 41.0
Assets, Fair Value Disclosure 30.5 60.1
Deferred Compensation Liabilities 0.0 0.0
Derivative Liability 0.0 0.0
Liabilities, Fair Value Disclosure 0.0 0.0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Deferred Compensation Investment 0.0 0.0
Derivative Asset 3.8 4.0
Equity securities 0.0 0.0
Assets, Fair Value Disclosure 3.8 4.0
Deferred Compensation Liabilities 47.3 49.0
Derivative Liability 10.6 9.7
Liabilities, Fair Value Disclosure 57.9 58.7
Debt, Fair Value 7,061.0 6,999.6
Level 2 | 2.50% convertible senior notes | Senior Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt, Fair Value $ 621.5 $ 647.5