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Common Shareholders' Equity, Equity Rollforward (Details) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Common shareholders' equity, share rollforward |  |  |
Common stock, shares issued ending balance | 132,749,000 us-gaap_CommonStockSharesIssued | 132,711,000 us-gaap_CommonStockSharesIssued |
Treasury Common Shares |  |  |
Common shareholders' equity, share rollforward |  |  |
Treasury shares, ending balance | 24,850,000 us-gaap_TreasuryStockShares / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 23,954,000 us-gaap_TreasuryStockShares / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |
Common Shares |  |  |
Common shareholders' equity, share rollforward |  |  |
Common stock, shares issued beginning balance | 125,545,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 125,512,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 125,502,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Conversion of Series A Common Shares | 25,000 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 33,000 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 10,000 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common stock, shares issued ending balance | 125,570,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 125,545,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 125,512,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common Shares | Treasury Common Shares |  |  |
Common shareholders' equity, share rollforward |  |  |
Treasury shares, beginning balance | 23,954,000 us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 24,641,000 us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 24,165,000 us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Repurchase of shares | 1,542,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 339,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 868,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Dividend reinvestment, incentive and compensation plans - Treasury shares | (646,000)us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (1,026,000)us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | (392,000)us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Treasury shares, ending balance | 24,850,000 us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 23,954,000 us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 24,641,000 us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Common Shares | Series A Share Conversion |  |  |
Common shareholders' equity, other disclosures |  |  |
Shares reserved | 7,178,943 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / tds_StockReserveAxis = tds_ShareConversionMember |  |
Common Shares | Tax-Deferred Savings Plan |  |  |
Common shareholders' equity, other disclosures |  |  |
Shares reserved | 90,341 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / tds_StockReserveAxis = tds_TaxDeferredSavingsPlanMember |  |
Series A Common Shares |  |  |
Common shareholders' equity, share rollforward |  |  |
Common stock, shares issued beginning balance | 7,166,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,160,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,119,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Conversion of Series A Common Shares | (25,000)us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | (33,000)us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | (10,000)us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Dividend reinvestment, incentive and compensation plans | 38,000 us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 39,000 us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 51,000 us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common stock, shares issued ending balance | 7,179,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,166,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 7,160,000 us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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