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Business Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | $ 1,224 |  | $ 1,278 | $ 3,724 |  | $ 3,848 |  |
Selling, general and administrative | 422 |  | 432 | 1,271 |  | 1,308 |  |
Depreciation, amortization and accretion | 238 |  | 225 | 704 |  | 681 |  |
Loss on impairment of licenses | 136 |  | 0 | 136 |  | 0 |  |
(Gain) loss on asset disposals, net | 6 |  | 6 | 23 |  | 22 |  |
(Gain) loss on sale of business and other exit costs, net | (12) |  | 0 | (12) |  | 0 |  |
(Gain) loss on license sales and exchanges, net | (2) |  | 0 | 4 |  | 0 |  |
Operating income (loss) | (80) |  | 48 | 27 |  | 110 |  |
Equity in earnings of unconsolidated entities | 43 |  | 40 | 125 |  | 122 |  |
Interest and dividend income | 8 |  | 5 | 20 |  | 16 |  |
Interest expense | (76) |  | (62) | (208) |  | (178) |  |
Other, net | 1 |  | 0 | 3 |  | 1 |  |
Income (loss) before income taxes | (104) |  | 31 | (33) |  | 71 |  |
Income tax expense (benefit) | (25) |  | 27 | 1 |  | 55 |  |
Net income (loss) | (79) |  | 4 | (34) |  | 16 |  |
Depreciation, amortization and accretion | 238 |  | 225 | 704 |  | 681 |  |
Expenses related to strategic alternatives review | 11 |  | 4 | 43 |  | 4 |  |
Loss on impairment of licenses | 136 |  | 0 | 136 |  | 0 |  |
(Gain) loss on asset disposals, net | 6 |  | 6 | 23 |  | 22 |  |
(Gain) loss on sale of business and other exit costs, net | (12) |  | 0 | (12) |  | 0 |  |
(Gain) loss on license sales and exchanges, net | (2) |  | 0 | 4 |  | 0 |  |
Interest expense | 76 |  | 62 | 208 |  | 178 |  |
Income tax expense (benefit) | (25) |  | 27 | 1 |  | 55 |  |
Adjusted EBITDA | 349 |  | 328 | 1,073 |  | 956 |  |
Investments in unconsolidated entities | 524 |  | 520 | 524 |  | 520 | $ 505 |
Total assets | 13,726 | [1] | 14,414 | 13,726 | [1] | 14,414 | $ 13,921 | [1]
Capital expenditures | 199 |  | 285 | 663 |  | 906 |  |
Service |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 1,027 |  | 1,043 | 3,105 |  | 3,128 |  |
Cost of goods and services | 295 |  | 311 | 890 |  | 933 |  |
Equipment and product sales |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 197 |  | 235 | 619 |  | 720 |  |
Cost of goods and services | 221 |  | 256 | 681 |  | 794 |  |
Corporate, Eliminations and Other |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 39 |  | 59 | 128 |  | 175 |  |
Selling, general and administrative | 17 |  | 17 | 58 |  | 44 |  |
Depreciation, amortization and accretion | 3 |  | 5 | 6 |  | 11 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | (1) |  | (1) | 1 |  | 0 |  |
(Gain) loss on sale of business and other exit costs, net | (12) |  |  | (12) |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Operating income (loss) | 0 |  | (9) | (26) |  | (22) |  |
Equity in earnings of unconsolidated entities | 0 |  | 0 | 2 |  | 1 |  |
Interest and dividend income | 3 |  | 1 | 7 |  | 5 |  |
Interest expense | (28) |  | (14) | (75) |  | (37) |  |
Other, net | 0 |  |  | 0 |  | 0 |  |
Income (loss) before income taxes | (26) |  | (23) | (91) |  | (53) |  |
Income tax expense (benefit) | (15) |  | 0 | (43) |  | (7) |  |
Net income (loss) | (10) |  | (23) | (48) |  | (46) |  |
Depreciation, amortization and accretion | 3 |  | 5 | 6 |  | 11 |  |
Expenses related to strategic alternatives review | 4 |  | 1 | 15 |  | 1 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | (1) |  | (1) | 1 |  | 0 |  |
(Gain) loss on sale of business and other exit costs, net | (12) |  |  | (12) |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Interest expense | 28 |  | 14 | 75 |  | 37 |  |
Income tax expense (benefit) | (15) |  | 0 | (43) |  | (7) |  |
Adjusted EBITDA | (3) |  | (3) | (6) |  | (4) |  |
Investments in unconsolidated entities | 42 |  | 39 | 42 |  | 39 |  |
Total assets | 287 |  | 350 | 287 |  | 350 |  |
Capital expenditures | 1 |  | 2 | 6 |  | 10 |  |
Corporate, Eliminations and Other | Service |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 18 |  | 25 | 64 |  | 73 |  |
Cost of goods and services | 14 |  | 19 | 51 |  | 57 |  |
Corporate, Eliminations and Other | Equipment and product sales |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 22 |  | 34 | 64 |  | 102 |  |
Cost of goods and services | 18 |  | 28 | 50 |  | 86 |  |
Intra-company eliminations | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | (33) |  | (32) | (98) |  | (95) |  |
Selling, general and administrative | 0 |  | 0 | 0 |  | 0 |  |
Depreciation, amortization and accretion | 0 |  | 0 | 0 |  | 0 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | 0 |  | 0 | 0 |  | 0 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Operating income (loss) | 0 |  | 0 | 0 |  | 0 |  |
Depreciation, amortization and accretion | 0 |  | 0 | 0 |  | 0 |  |
Expenses related to strategic alternatives review | 0 |  | 0 | 0 |  | 0 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | 0 |  | 0 | 0 |  | 0 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Adjusted EBITDA | 0 |  | 0 | 0 |  | 0 |  |
Capital expenditures | 0 |  | 0 | 0 |  | 0 |  |
Intra-company eliminations | Service | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | (33) |  | (32) | (98) |  | (95) |  |
Cost of goods and services | (33) |  | (32) | (98) |  | (95) |  |
Intra-company eliminations | Equipment and product sales | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 0 |  | 0 | 0 |  | 0 |  |
Cost of goods and services | 0 |  | 0 | 0 |  | 0 |  |
Wireless | Operating segment | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 896 |  | 938 | 2,722 |  | 2,831 |  |
Selling, general and administrative | 316 |  | 324 | 953 |  | 995 |  |
Depreciation, amortization and accretion | 155 |  | 148 | 466 |  | 456 |  |
Loss on impairment of licenses | 136 |  |  | 136 |  |  |  |
(Gain) loss on asset disposals, net | 4 |  | 1 | 13 |  | 14 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | (2) |  |  | 4 |  |  |  |
Operating income (loss) | (109) |  | 38 | (62) |  | 61 |  |
Depreciation, amortization and accretion | 155 |  | 148 | 466 |  | 456 |  |
Expenses related to strategic alternatives review | 7 |  | 3 | 26 |  | 3 |  |
Loss on impairment of licenses | 136 |  |  | 136 |  |  |  |
(Gain) loss on asset disposals, net | 4 |  | 1 | 13 |  | 14 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | (2) |  |  | 4 |  |  |  |
Adjusted EBITDA | 191 |  | 190 | 583 |  | 534 |  |
Capital expenditures | 114 |  | 106 | 400 |  | 452 |  |
Wireless | Operating segment | Service | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 721 |  | 737 | 2,168 |  | 2,214 |  |
Cost of goods and services | 193 |  | 199 | 582 |  | 597 |  |
Wireless | Operating segment | Equipment and product sales | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 175 |  | 201 | 554 |  | 617 |  |
Cost of goods and services | 203 |  | 228 | 630 |  | 708 |  |
Towers | Operating segment | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 59 |  | 57 | 175 |  | 170 |  |
Selling, general and administrative | 8 |  | 9 | 24 |  | 25 |  |
Depreciation, amortization and accretion | 12 |  | 11 | 33 |  | 34 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | 0 |  | 0 | 1 |  | 0 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Operating income (loss) | 19 |  | 19 | 59 |  | 56 |  |
Depreciation, amortization and accretion | 12 |  | 11 | 33 |  | 34 |  |
Expenses related to strategic alternatives review | 0 |  | 0 | 2 |  | 0 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | 0 |  | 0 | 1 |  | 0 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Adjusted EBITDA | 31 |  | 30 | 95 |  | 90 |  |
Capital expenditures | 6 |  | 5 | 15 |  | 10 |  |
Towers | Operating segment | Service | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 59 |  | 57 | 175 |  | 170 |  |
Cost of goods and services | 20 |  | 18 | 58 |  | 55 |  |
Towers | Operating segment | Equipment and product sales | UScellular |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 0 |  | 0 | 0 |  | 0 |  |
Cost of goods and services | 0 |  | 0 | 0 |  | 0 |  |
UScellular Total |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 922 |  | 963 | 2,799 |  | 2,906 |  |
UScellular Total | Operating segment |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 922 |  | 963 | 2,799 |  | 2,906 |  |
Selling, general and administrative | 324 |  | 333 | 977 |  | 1,020 |  |
Depreciation, amortization and accretion | 167 |  | 159 | 499 |  | 490 |  |
Loss on impairment of licenses | 136 |  |  | 136 |  |  |  |
(Gain) loss on asset disposals, net | 4 |  | 1 | 14 |  | 14 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | (2) |  |  | 4 |  |  |  |
Operating income (loss) | (90) |  | 57 | (3) |  | 117 |  |
Equity in earnings of unconsolidated entities | 43 |  | 40 | 123 |  | 121 |  |
Interest and dividend income | 4 |  | 3 | 9 |  | 8 |  |
Interest expense | (49) |  | (50) | (137) |  | (147) |  |
Other, net | 0 |  |  | 0 |  | 0 |  |
Income (loss) before income taxes | (92) |  | 50 | (8) |  | 99 |  |
Income tax expense (benefit) | (14) |  | 27 | 29 |  | 56 |  |
Net income (loss) | (78) |  | 23 | (37) |  | 43 |  |
Depreciation, amortization and accretion | 167 |  | 159 | 499 |  | 490 |  |
Expenses related to strategic alternatives review | 7 |  | 3 | 28 |  | 3 |  |
Loss on impairment of licenses | 136 |  |  | 136 |  |  |  |
(Gain) loss on asset disposals, net | 4 |  | 1 | 14 |  | 14 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | (2) |  |  | 4 |  |  |  |
Interest expense | 49 |  | 50 | 137 |  | 147 |  |
Income tax expense (benefit) | (14) |  | 27 | 29 |  | 56 |  |
Adjusted EBITDA | 269 |  | 263 | 810 |  | 753 |  |
Investments in unconsolidated entities | 478 |  | 477 | 478 |  | 477 |  |
Total assets | 10,516 |  | 10,749 | 10,516 |  | 10,749 |  |
Capital expenditures | 120 |  | 111 | 415 |  | 462 |  |
UScellular Total | Operating segment | Service |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 747 |  | 762 | 2,245 |  | 2,289 |  |
Cost of goods and services | 180 |  | 185 | 542 |  | 557 |  |
UScellular Total | Operating segment | Equipment and product sales |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 175 |  | 201 | 554 |  | 617 |  |
Cost of goods and services | 203 |  | 228 | 630 |  | 708 |  |
TDS Telecom |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 263 |  | 256 | 797 |  | 767 |  |
TDS Telecom | Operating segment |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 263 |  | 256 | 797 |  | 767 |  |
Selling, general and administrative | 81 |  | 82 | 236 |  | 244 |  |
Depreciation, amortization and accretion | 68 |  | 61 | 199 |  | 180 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | 3 |  | 6 | 8 |  | 8 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Operating income (loss) | 10 |  | 0 | 56 |  | 15 |  |
Equity in earnings of unconsolidated entities | 0 |  | 0 | 0 |  | 0 |  |
Interest and dividend income | 1 |  | 1 | 4 |  | 3 |  |
Interest expense | 1 |  | 2 | 4 |  | 6 |  |
Other, net | 1 |  |  | 3 |  | 1 |  |
Income (loss) before income taxes | 14 |  | 4 | 66 |  | 25 |  |
Income tax expense (benefit) | 4 |  | 0 | 15 |  | 6 |  |
Net income (loss) | 9 |  | 4 | 51 |  | 19 |  |
Depreciation, amortization and accretion | 68 |  | 61 | 199 |  | 180 |  |
Expenses related to strategic alternatives review | 0 |  | 0 | 0 |  | 0 |  |
Loss on impairment of licenses | 0 |  |  | 0 |  |  |  |
(Gain) loss on asset disposals, net | 3 |  | 6 | 8 |  | 8 |  |
(Gain) loss on sale of business and other exit costs, net | 0 |  |  | 0 |  |  |  |
(Gain) loss on license sales and exchanges, net | 0 |  |  | 0 |  |  |  |
Interest expense | (1) |  | (2) | (4) |  | (6) |  |
Income tax expense (benefit) | 4 |  | 0 | 15 |  | 6 |  |
Adjusted EBITDA | 83 |  | 68 | 269 |  | 207 |  |
Investments in unconsolidated entities | 4 |  | 4 | 4 |  | 4 |  |
Total assets | 2,923 |  | 3,315 | 2,923 |  | 3,315 |  |
Capital expenditures | 78 |  | 172 | 242 |  | 434 |  |
TDS Telecom | Operating segment | Service |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 262 |  | 256 | 796 |  | 766 |  |
Cost of goods and services | 101 |  | 107 | 297 |  | 319 |  |
TDS Telecom | Operating segment | Equipment and product sales |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total operating revenues | 0 |  | 0 | 1 |  | 1 |  |
Cost of goods and services | $ 0 |  | $ 0 | $ 1 |  | $ 0 |  |
[1] | The consolidated total assets as of September 30, 2024 and December 31, 2023, include assets held by consolidated variable interest entities (VIEs) of $1,018 million and $1,188 million, respectively, which are not available to be used to settle the obligations of TDS. The consolidated total liabilities as of September 30, 2024 and December 31, 2023, include certain liabilities of consolidated VIEs of $22 million and $23 million, respectively, for which the creditors of the VIEs have no recourse to the general credit of TDS. See Note 12 — Variable Interest Entities for additional information.

X
- Definition This element represents a segment measure reported to the chief operating decision maker for purposes of making decisions about allocating resources to the segments and assessing their performance.The amount is calculated as Income before income taxes, adjusted for: Depreciation, amortization and accretion; net Gain or loss on asset disposals (if any); net Gain or loss on sale of business and other exit costs (if any); net Gain or loss on license sales and exchanges (if any); Interest expense; and Income tax expense (benefit). + References No definition available. + Details
Name: | tds_AdjustedEBITDA
Namespace Prefix: | tds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Expenses related to the company's strategic alternative review of UScellular. + References No definition available. + Details
Name: | tds_ExpensesRelatedToStrategicAlternativesReview
Namespace Prefix: | tds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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