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Stock-Based Compensation, TDS excluding U.S. Cellular, Nonvested shares and other stock compensation disclosures (Details) - TDS Parent Company - Common Shares - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Deferred Compensation Stock Units      
Stock based compensation, Nonvested shares weighted average grant date fair value      
Fair value of vested stock units $ 0.1 $ 0.1 $ 0.1
Weighted average grant date fair value $ 25.36 $ 23.27 $ 21.99
Shares issued and granted under stock compensation plans      
Vested number of shares, unissued 261,000    
Vested number of shares, unissued, fair value $ 6.8    
Restricted Stock Units      
Stock based compensation, Nonvested shares rollforward, number of shares      
Nonvested stock units, begin of period - Number of shares 692,000    
Granted number of shares 368,000    
Forfeited number of shares (16,000)    
Nonvested stock units, end of period - Number of shares 1,044,000 692,000  
Stock based compensation, Nonvested shares weighted average grant date fair value      
Nonvested stock units - begin of period weighted average grant date fair value $ 23.20    
Granted weighted average grant date fair value 27.57 $ 25.26 $ 21.09
Forfeited weighted average grant date fair value 25.60    
Nonvested stock units - end of period weighted average grant date fair value $ 24.70 $ 23.20  
Fair value of vested stock units   $ 7.5 $ 5.8
Shares issued and granted under stock compensation plans      
Granted number of shares 368,000    
Non-Employee Directors' Plan      
Shares issued and granted under stock compensation plans      
Shares issued 28,000 33,000 33,000