v3.26.3
Segment Reporting (Schedule of Segment Reporting Information, Reconcile to Net Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting [Abstract]        
Revenues $ 443.0 $ 419.1 $ 1,306.5 $ 1,231.3
Labor and Related Expense 61.6 60.7 191.7 183.9
Stock-based compensation 20.3 18.4 58.8 51.8
Equipment Expense 14.7 12.5 42.8 37.0
Registry fee expenses 12.2 12.1 35.6 35.4
Depreciation of property and equipment 6.8 7.3 19.8 24.5
Segment Reporting, Other Segment Item, Amount 30.9 23.8 71.4 62.5
Operating Expenses 146.5 134.8 420.1 395.1
Operating income 296.5 284.3 886.4 836.2
Interest Expense 21.2 18.9 59.3 58.1
Nonoperating Gains (Losses) 4.3 6.3 13.5 19.3
Income tax expense from continuing operations 67.0 58.9 197.0 177.9
Net Income $ 212.6 $ 212.8 $ 643.6 $ 619.5