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Noncontrolling Interests (Tables) | 3 Months Ended
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Mar. 31, 2025
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Change Due to Net Income Attributable to Parent and Effects of Changes, Net [Abstract] |
Noncontrolling interests | The following schedule discloses the effects of Net income attributable to TDS shareholders and changes in TDS’ ownership interest in UScellular on TDS’ equity:
Three Months Ended March 31, | 2025 |  | 2024
(Dollars in millions) |  |  |
Net income attributable to TDS shareholders | $ | 7 |  |  | $ | 29 |
Transfers (to) from noncontrolling interests |  |  |
Change in TDS' Capital in excess of par value from UScellular's issuance of UScellular shares | (16) |  |  | (1) |
Change in TDS' Capital in excess of par value from UScellular's repurchases of UScellular shares | (3) |  |  | — |
Net transfers (to) from noncontrolling interests | (19) |  |  | (1) |
Net income (loss) attributable to TDS shareholders after transfers (to) from noncontrolling interests | $ | (12) |  |  | $ | 28 |

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- Definition The tabular disclosure of the effects of any changes in a parent's ownership interest in a subsidiary on the equity attributable to the parent if the ownership interests in a subsidiary changes during the period. The changes represented by this element did not result in the deconsolidation of the subsidiary. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -Publisher FASB -URI https://asc.fasb.org/1943274/2147481175/810-10-55-4M Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -SubTopic 10 -Topic 810 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A + Details
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