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Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2014
Stockholders Equity Transaction [Line Items] |  |  |  |
Remaining number of shares available for repurchase | 2,100,000 |  |  |
Repurchase of common stock for employee tax withholdings, shares | 138,000 | 130,000 | 254,000 |
Repurchase of common stock for tax withholdings, value |  | $ 6.3 | $ 11.9 |
Cash dividends declared per common share | $ 1.06 | $ 1.00 | $ 0.94 |
Cash dividend | $ 33.7 | $ 32.7 | $ 30.9 |
Stock warrants term |  |  |  | 10 years
Stock warrants, exercise price |  |  |  | $ 26.68
Conversion Of Comcast Current Residential Customer Accounts |  |  |  |
Stockholders Equity Transaction [Line Items] |  |  |  |
Issuance of stock warrants |  |  |  | 1,900,000
Comcast |  |  |  |
Stockholders Equity Transaction [Line Items] |  |  |  |
Issuance of stock warrants |  |  |  | 2,900,000
Stock warrants issued | 1,000,000.0 |  |  |
Stock warrants vested | 0 |  |  |
Beneficial ownership required for potential cash settlement |  | 19.99% |  |
SEC Rule 10b5-1 Plan |  |  |  |
Stockholders Equity Transaction [Line Items] |  |  |  |
Repurchase of common stock, shares | 1,497,000 | 733,000 | 624,000 |
Total amount paid | $ 87.9 | $ 36.0 | $ 26.3 |
Weighted-average price per share | $ 58.71 | $ 49.13 | $ 42.13 |
Repurchase of common stock for tax withholdings, value | $ 8.7 |  |  |

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