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Shareholders' Equity - Narrative (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2017 shares | Nov. 30, 2009 shares | Dec. 31, 2024 USD ($) director vote $ / shares shares | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) $ / shares shares | Aug. 02, 2013 USD ($)
Share repurchases |  |  |  |  |  |  |
Purchase price | $ |  |  |  | $ 6,000,000 | $ 40,000,000 |  |
Series A Common Shares |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Number of votes | vote |  |  | 10 |  |  |  |
Number of directors entitled to elect shares | director |  |  | 8 |  |  |  |
Common Shares |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Number of votes | vote |  |  | 1 |  |  |  |
Number of directors entitled to elect shares | director |  |  | 4 |  |  |  |
Share repurchases |  |  |  |  |  |  |
Repurchase authorization | $ |  |  |  |  |  |  | $ 250,000,000
Repurchase authorization, maximum dollar value | $ |  |  | $ 132,000,000 |  |  |  |
Common Shares | Share Conversion |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Shares reserved (in shares) |  |  | 7,534,000 |  |  |  |
Common Shares | Tax-Deferred Savings Plan |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Shares reserved (in shares) |  |  | 916,000 |  |  |  |
UScellular Common Shares | UScellular |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |
Repurchase authorization, additional number of shares per year (in shares) |  | 1,300,000 |  |  |  |  |
Repurchase of Common Shares |  |  | 939,999 |  |  |  |
Purchase price | $ |  |  | $ 55,000,000 |  |  |  |
Average cost per share | $ / shares |  |  | $ 58.06 |  |  |  |
Repurchase authorization, cumulative shares authorized (in shares) |  |  | 986,942 |  |  |  |
UScellular Common Shares | UScellular | Maximum |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |
Repurchase authorization, additional number of shares per year (in shares) | 1,300,000 |  |  |  |  |  |
UScellular Common Shares | UScellular | Minimum |  |  |  |  |  |  |
Share repurchases |  |  |  |  |  |  |
Repurchase authorization, additional number of shares per year (in shares) | 0 |  |  |  |  |  |
Series UU Preferred Shares |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Shares issued |  |  |  |  |  | 16,800 |
Interest rate |  |  | 6.625% |  |  | 6.625% |
Shares issued (price per share) | $ / shares |  |  |  |  |  | $ 25,000 |
Depositary shares | $ |  |  |  |  |  | $ 16,800,000 |
Liquidation preference per share (in dollars per share) | $ |  |  | $ 25,000 |  |  |  |
Redemption price per Preferred Share | $ / shares |  |  | $ 25,000 |  |  |  |
Common Shares issued upon conversion |  |  | 2,773.2 |  |  |  |
Series UU Preferred Shares | Redemption price after credit rating downgrade |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Redemption price per Preferred Share | $ / shares |  |  | $ 25,500 |  |  |  |
Series UU Preferred Shares | Redemption price after change in control |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Redemption price per Preferred Share | $ / shares |  |  | $ 25,000 |  |  |  |
Series VV Preferred Shares |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Shares issued |  |  |  |  |  | 27,600 |
Interest rate |  |  | 6.00% |  |  | 6.00% |
Shares issued (price per share) | $ / shares |  |  |  |  |  | $ 25,000 |
Depositary shares | $ |  |  |  |  |  | $ 27,600,000 |
Liquidation preference per share (in dollars per share) | $ |  |  | $ 25,000 |  |  |  |
Redemption price per Preferred Share | $ / shares |  |  | $ 25,000 |  |  |  |
Common Shares issued upon conversion |  |  | 2,584 |  |  |  |
Series VV Preferred Shares | Redemption price after credit rating downgrade |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Redemption price per Preferred Share | $ / shares |  |  | $ 25,500 |  |  |  |
Series VV Preferred Shares | Redemption price after change in control |  |  |  |  |  |  |
Shareholders' equity, other disclosures |  |  |  |  |  |  |
Redemption price per Preferred Share | $ / shares |  |  | $ 25,000 |  |  |  |

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