Quarterly report pursuant to Section 13 or 15(d)

Business and Summary of Significant Accounting Principles (Revenue Recognition) (Details)

v3.7.0.1
Business and Summary of Significant Accounting Principles (Revenue Recognition) (Details)
$ in Millions
6 Months Ended
Jun. 30, 2017
USD ($)
Universal Service Fund [Member]  
Public Utilities, General Disclosures [Line Items]  
Revenue adjustment $ 5.5