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Revenue Recognition (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]      
Balances previously classified as contract liabilities in prior periods that were recognized as revenues $ 2.6 $ 2.6 $ 3.0
Deferred revenue $ 11.5    
Revenue recognized as result of contract modification     $ 4.1