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Commitments and Contingencies 4 (Details) (USD $) | 12 Months Ended
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Dec. 31, 2010
Billing And Operational Support System Installation [Member] |
Long Term Purchase Commitment [Line Items] |
Purchase commitment agreement description | On August 17, 2010, U.S. Cellular and Amdocs Software Systems Limited (“Amdocs”) entered into agreements to develop a Billing and Operational Support System (“B/OSS”). Amdocs will license to U.S. Cellular certain customer order and relationship management, revenue management and billing software relating to the B/OSS.
Purchase commitment period | August 2010 to October 2012
Purchase commitment required payments | $ 73,000,000
Purchase commitment required payments made | 11,000,000
Billing And Operational Support System Maintenance [Member] |
Long Term Purchase Commitment [Line Items] |
Purchase commitment period | A period of seven years, beginning in 2013
Purchase commitment required payments | $ 35,000,000

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + Details
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Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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. + Details
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Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
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Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + Details
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Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Specifies the time period covered by the arrangement. + Details
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Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payments made to date on the minimum amount the entity agreed to spend under the long-term purchase commitment. + Details
Name: | usm_LongTermPurchaseCommitmentAmountPaid
Namespace Prefix: | usm
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration