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Commitments And Contingencies (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]      
Expiration Date of Registry Agreement Nov. 30, 2024    
Registry fee per transaction $ 0.25    
Uncertain tax positions 16,200,000    
Payments for registry fees 40,600,000 $ 36,300,000 $ 34,700,000
ICANN SSR Payments $ 4,000,000.0