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Commitments and Contingencies (Details)
1 Months Ended 6 Months Ended 24 Months Ended
Oct. 14, 2011
plaintiff
Feb. 28, 2017
USD ($)
Jun. 30, 2017
USD ($)
plaintiff
lawsuit
Dec. 31, 2007
USD ($)
Loss Contingencies        
Patents allegedly infringed (at least)     1  
Unfavorable regulatory action        
Loss Contingencies        
Estimate of possible loss (per proceeding)     $ 100,000  
William Douglas Fulghum, et al. v. Embarq Corporation        
Loss Contingencies        
Effect of modifications made to Embarq's benefits program (greater than)       $ 300,000,000
Abbott et al. v. Sprint Nextel et al.        
Loss Contingencies        
Number of plaintiffs | plaintiff 1,500      
Judicial ruling | Missouri municipalities        
Loss Contingencies        
Number of cases, final court order   1    
Litigation settlement amount   $ 4,000,000    
CenturyLink, Inc. | Interexchange Carriers        
Loss Contingencies        
Number of plaintiffs | plaintiff     3  
Number of lawsuits (approximately) | lawsuit     100