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Noncontrolling Interests (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Noncontrolling Interest [Abstract] |  |  |
Net income attributable to TDS shareholders | $ (28) | $ (500) | $ 62
Transfer (to) from the noncontrolling interests |  |  |
Change in TDS’ Capital in excess of par value from UScellular's issuance of UScellular shares | (43) | (33) | (19)
Change in TDS’ Capital in excess of par value from UScellular’s repurchases of UScellular shares | (4) | 0 | 35
Net transfers (to) from noncontrolling interests | (47) | (33) | 16
Net income (loss) attributable to TDS shareholders after transfers (to) from noncontrolling interests | (75) | $ (533) | $ 78
Redeemable noncontrolling interest |  |  |
Settlement value of mandatorily redeemable noncontrolling interests | 21 |  |
Carrying value of mandatorily redeemable noncontrolling interests | $ 6 |  |

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