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Revenue Recognition (Comparison Of Geographic Revenues) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disaggregation of Revenue [Line Items]      
Total revenues $ 1,557.4 $ 1,493.1 $ 1,424.9
U.S. [Member]      
Disaggregation of Revenue [Line Items]      
Total revenues 1,035.5 994.7 937.6
EMEA [Member]      
Disaggregation of Revenue [Line Items]      
Total revenues 249.6 228.2 226.0
Asia Pacific      
Disaggregation of Revenue [Line Items]      
Total revenues 175.7 174.8 167.7
Other [Member]      
Disaggregation of Revenue [Line Items]      
Total revenues $ 96.6 $ 95.4 $ 93.6