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Basis of Presentation - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Basis of Presentation [Line Items] |  |
Noncash software license acquisitions | $ 2 | $ 5
Expenses related to strategic alternatives review | $ 7 |
TDS | UScellular |  |
Basis of Presentation [Line Items] |  |
Ownership percentage | 83.00% |

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