Annual report pursuant to Section 13 and 15(d)

Business and Summary of Significant Accounting Principles (Rural Health Care (RHC) Program) (Details)

v3.8.0.1
Business and Summary of Significant Accounting Principles (Rural Health Care (RHC) Program) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
USAC  
Public Utilities, General Disclosures [Line Items]  
Reduction in revenues $ 5.5