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Description of the business: - Gross receipts taxes, universal service fund and other surcharges (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Description of the business:        
Excise taxes and surcharge $ 19.2 $ 19.8 $ 59.4 $ 59.5