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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2011
Earnings Per Share 
Earnings Per Share
  Three Months Ended Nine Months Ended
  September 30, September 30,
  2011 2010 2011 2010
(Dollars and shares in thousands, except per share amounts)               
Net income attributable to U.S. Cellular shareholders$62,140  $38,296  $172,240  $128,292 
                 
Weighted average number of shares used in basic earnings per share 84,547   85,992   84,984   86,329 
Effects of dilutive securities:               
 Stock options 86   104   124   80 
 Restricted stock units 307   332   340   297 
Weighted average number of shares used in diluted earnings per share 84,940   86,428   85,448   86,706 
                 
Basic earnings per share attributable to U.S. Cellular shareholders$0.73  $0.45  $2.03  $1.49 
                 
Diluted earnings per share attributable to U.S. Cellular shareholders$0.73  $0.44  $2.02  $1.48 
Summary of antidilutive shares
 Three Months Ended Nine Months Ended
  September 30, September 30,
  2011 2010 2011 2010
(Shares in thousands)       
Stock options1,605 1,836 1,357 1,768
Restricted stock units1  193 195