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Commitments and Contingencies, purchase commitments (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014
Apple |
Long-term Purchase Commitment |
Purchase commitment agreement description | During 2013, U.S. Cellular entered into agreements with Apple to purchase certain minimum quantities of Apple iPhone products and fund marketing programs related to the Apple iPhone and iPad products over a three-year period beginning in November 2013. Based on current forecasts, TDS estimates that the remaining contractual commitment as of December 31, 2014 under these agreements is approximately $818 million. At this time, TDS expects to meet its contractual commitments with Apple.
Purchase commitment period | 3 years
Purchase commitment remaining estimated payments | $ 818,000,000 tds_RemainingLongTermPurchaseCommitmentEstimate / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = us-gaap_InventoriesMember
Amdocs Software Systems Limited |
Long-term Purchase Commitment |
Purchase commitment agreement description | On November 25, 2014, U.S. Cellular executed a Master Statement of Work and certain other documents with Amdocs Software Systems Limited (“Amdocs”), effective October 1, 2014, that inter-relate with but rearrange the structure under previous Amdocs Agreements. The agreement provides that U.S. Cellular will now outsource to Amdocs certain support functions for its Billing and Operational Support System (“B/OSS”). Such functions include application support, billing operations and some infrastructure services. The agreement has a term through September 30, 2019, subject to five one-year renewal periods at U.S. Cellular’s option. The total estimated amount to be paid to Amdocs with respect to the agreement during the initial five-year term is approximately $110 million (exclusive of travel and expenses and subject to certain potential adjustments).
Purchase commitment period | 5 years
Purchase commitment estimated payments | $ 110,000,000 tds_LongTermPurchaseCommitmentEstimate / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = us-gaap_SoftwareAndSoftwareDevelopmentCostsMember

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- Definition The estimated amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | tds_LongTermPurchaseCommitmentEstimate
Namespace Prefix: | tds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The remaining estimated amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | tds_RemainingLongTermPurchaseCommitmentEstimate
Namespace Prefix: | tds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Describes the terms of a significant arrangement with a supplier (excluding an unconditional purchase obligation) to acquire goods or services over a period of time beyond one year or the normal operating cycle, if longer, which may include identification of the goods or services to be purchased, pricing, effects on pricing of failing to reach minimum quantities required to be purchased, cancellation rights, and termination provisions. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_InventoriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |