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Commitments And Contingencies (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]      
Uncertain tax positions $ 7,100,000    
Expiration Date of Registry Agreement Nov. 30, 2024    
Registry fee per transaction $ 0.25    
Payments for registry fees 38,100,000 $ 39,900,000 $ 40,600,000
ICANN SSR Payments $ 4,000,000.0