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Commitments and Contingencies 3 (Details) (USD $) | 12 Months Ended
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Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008
Lease Commitments And Purchase Agreements [Abstract] |  |  |
Rent expense | $ 163,100,000 | $ 155,700,000 | $ 138,600,000
Rent revenue | $ 35,400,000 | $ 31,800,000 | $ 26,800,000

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- Definition Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 15 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph c + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 19 -Subparagraph b + Details
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Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | usm
Data Type: | xbrli:stringItemType
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