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Debt - Term Loan Agreements (Details) - USD ($) |  |  |  |  |  | 12 Months Ended
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Dec. 01, 2026 | Mar. 01, 2026 | Mar. 01, 2024 | Mar. 01, 2023 | Dec. 01, 2022 | Dec. 31, 2022
TDS Term Loan 1 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 200,000,000
Amount borrowed and outstanding |  |  |  |  |  | 198,000,000
Amount borrowed and repaid |  |  |  |  |  | 2,000,000
Amount available for use |  |  |  |  |  | 0
Quarterly installments |  |  |  |  |  | 500,000
TDS Term Loan 2 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 300,000,000
Amount borrowed and outstanding |  |  |  |  |  | 299,000,000
Amount borrowed and repaid |  |  |  |  |  | 1,000,000
Amount available for use |  |  |  |  |  | 0
Quarterly installments |  |  |  |  | $ 750,000 |
TDS Term Loan 2 | Subsequent Event |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Quarterly installments | $ 2,000,000 |  |  |  |  |
TDS Term Loan Agreements |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 500,000,000
Amount borrowed and outstanding |  |  |  |  |  | 497,000,000
Amount borrowed and repaid |  |  |  |  |  | 3,000,000
Amount available for use |  |  |  |  |  | 0
Amount borrowed during the period |  |  |  |  |  | 300,000,000
UScellular Term Loan 1 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 300,000,000
Amount borrowed and outstanding |  |  |  |  |  | 300,000,000
Amount borrowed and repaid |  |  |  |  |  | 0
Amount available for use |  |  |  |  |  | 0
UScellular Term Loan 1 | Subsequent Event |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Quarterly installments |  | $ 8,000,000 | $ 4,000,000 | $ 2,000,000 |  |
UScellular Term Loan 2 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 300,000,000
Amount borrowed and outstanding |  |  |  |  |  | 296,000,000
Amount borrowed and repaid |  |  |  |  |  | 4,000,000
Amount available for use |  |  |  |  |  | 0
Quarterly installments |  |  |  |  |  | 750,000
UScellular Term Loan 3 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 200,000,000
Amount borrowed and outstanding |  |  |  |  |  | 200,000,000
Amount borrowed and repaid |  |  |  |  |  | 0
Amount available for use |  |  |  |  |  | 0
Quarterly installments |  |  |  |  | $ 500,000 |
UScellular Term Loan 3 | Subsequent Event |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Quarterly installments | $ 1,000,000 |  |  |  |  |
UScellular Term Loan Agreements |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | 800,000,000
Amount borrowed and outstanding |  |  |  |  |  | 796,000,000
Amount borrowed and repaid |  |  |  |  |  | 4,000,000
Amount available for use |  |  |  |  |  | 0
Amount borrowed during the period |  |  |  |  |  | $ 500,000,000
LIBOR rate | TDS Term Loan 1 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Contractual spread |  |  |  |  |  | 2.00%
LIBOR rate | TDS Term Loan 2 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Contractual spread |  |  |  |  |  | 2.50%
SOFR Rate | UScellular Term Loan 1 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Contractual spread |  |  |  |  |  | 1.60%
SOFR Rate | UScellular Term Loan 2 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Contractual spread |  |  |  |  |  | 2.10%
SOFR Rate | UScellular Term Loan 3 |  |  |  |  |  |
Long-term debt |  |  |  |  |  |
Contractual spread |  |  |  |  |  | 2.60%

X
- Definition Amounts drawn from a line of credit, which have been repaid and can not be reborrowed. + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of the required periodic payments applied to principal. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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