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Consolidated Statement of Changes in Equity - USD ($)
$ in Millions
Total
Series A Common and Common shares
Additional paid-in capital
Treasury shares
Retained earnings
Total U.S. Cellular shareholders' equity
Noncontrolling interests
Beginning balance at Dec. 31, 2016 $ 3,645 $ 88 $ 1,522 $ (136) $ 2,160 $ 3,634 $ 11
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income attributable to U.S. Cellular shareholders 12       12 12  
Net income attributable to noncontrolling interests classified as equity 3         0 3
Incentive and compensation plans 1     16 (15) 1  
Stock-based compensation awards 30   30     30  
Distributions to noncontrolling interests (4)         0 (4)
Ending balance at Dec. 31, 2017 3,687 88 1,552 (120) 2,157 3,677 10
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Cumulative effect of accounting change 176       175 175 1
Net income attributable to U.S. Cellular shareholders 150       150 150  
Net income attributable to noncontrolling interests classified as equity 2         0 2
Incentive and compensation plans 18   1 55 (38) 18  
Stock-based compensation awards 37   37     37  
Distributions to noncontrolling interests (3)         0 (3)
Ending balance at Dec. 31, 2018 4,067 88 1,590 (65) 2,444 4,057 10
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Cumulative effect of accounting change 2       2 2  
Net income attributable to U.S. Cellular shareholders 127       127 127  
Net income attributable to noncontrolling interests classified as equity 6         0 6
Repurchase of Common Shares (21)     (21)   (21)  
Incentive and compensation plans (9)   (2) 16 (23) (9)  
Stock-based compensation awards 41   41     41  
Distributions to noncontrolling interests (3)         0 (3)
Ending balance at Dec. 31, 2019 $ 4,210 $ 88 $ 1,629 $ (70) $ 2,550 $ 4,197 $ 13