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Revenue Recognition (Comparison Of Geographic Revenues) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]      
Total revenues $ 1,424.9 $ 1,327.6 $ 1,265.1
U.S. [Member]      
Disaggregation of Revenue [Line Items]      
Total revenues 937.6 851.3 804.7
EMEA [Member]      
Disaggregation of Revenue [Line Items]      
Total revenues 226.0 231.7 214.2
CHINA      
Disaggregation of Revenue [Line Items]      
Total revenues 106.0 101.7 113.7
Other [Member]      
Disaggregation of Revenue [Line Items]      
Total revenues $ 155.3 $ 142.9 $ 132.5