Basis of Presentation (Details) - CAF Phase 2 Support number in Millions, $ in Millions		3 Months Ended	6 Months Ended
	Aug. 27, 2015 USD ($)	Jun. 30, 2016 USD ($) state	Jun. 30, 2016 USD ($) state
Operating revenues by products and services
Federal support, total amount per agreement	$ 500
Contract or agreement term	6 years
Number of rural households and businesses	1.2
Number of states in which service is provided (states) | state		33	33
Incremental increase in revenues		$ 52	$ 104