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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2012
Earnings Per Share Abstract  
Earnings per share
  Three Months Ended
  March 31,
  2012 2011
(Dollars and shares in thousands, except per share amounts)       
Net income attributable to U.S. Cellular shareholders$62,492  $35,161 
         
Weighted average number of shares used in basic earnings per share 84,570   85,484 
Effects of dilutive securities:       
 Stock options 135   177 
 Restricted stock units 428   440 
Weighted average number of shares used in diluted earnings per share 85,133   86,101 
         
Basic earnings per share attributable to U.S. Cellular shareholders$0.74  $0.41 
         
Diluted earnings per share attributable to U.S. Cellular shareholders$0.73  $0.41 
Summary of antidilutive shares
 Three Months Ended
  March 31,
  2012 2011
(Shares in thousands)   
Stock options1,444 1,055
     
Restricted stock units 1