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Stock-Based Compensation, U.S. Cellular, Nonvested shares and other stock compensation disclosures (Details) (U.S. Cellular, US Cellular Common Shares, USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
2005 Long-Term Incentive Plan | Restricted Stock Units
     
Stock based compensation, Nonvested shares rollforward, number of shares      
Nonvested stock units, begin of period - Number of shares 845,000    
Granted number of shares 468,000    
Vested number of shares (225,000)    
Forfeited number of shares (75,000)    
Nonvested stock units, end of period - Number of shares 1,013,000 845,000  
Stock based compensation, Nonvested shares weighted average grant date fair value      
Nonvested stock units - begin of period weighted average grant date fair value $ 42.48    
Granted weighted average grant date fair value $ 39.75 $ 49.35 $ 42.21
Vested weighted average grant date fair value $ 32.96    
Forfeited weighted average grant date fair value $ 43.74    
Nonvested stock units - end of period weighted average grant date fair value $ 43.24 $ 42.48  
Fair value of vested stock units $ 8.9 $ 9.5 $ 4.7
2005 Long-Term Incentive Plan | Deferred Compensation Stock Units
     
Stock based compensation, Nonvested shares weighted average grant date fair value      
Granted weighted average grant date fair value $ 42.37 $ 48.72 $ 40.76
Fair value of vested stock units 0.1 0.1 0.4
Shares issued and granted under stock compensation plans      
Vested number of shares, unissued 7,000    
Vested number of shares, unissued, fair value $ 0.2    
Non-Employee Directors' Plan
     
Shares issued and granted under stock compensation plans      
Shares issued 7,600 6,600 9,000