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Commitments And Contingencies (Narrative) (Details) - USD ($) | 12 Months Ended
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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 |  |

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- Definition Amount recognized for uncertainty in income taxes classified as noncurrent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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