v3.26.1
Financial Instruments and Fair Value Measurements (Summary Of Carrying Values and Fair Values Of Fixed Rate Debt) (Details) - Senior Notes - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Carrying value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed rate debt $ 3,428.1 $ 3,425.6
Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed rate debt $ 3,326.2 $ 3,357.7