Commitments And Contingencies (Narrative) (Details) $ in Millions	1 Months Ended		6 Months Ended
	Sep. 30, 2018 item	Aug. 31, 2018 USD ($)	Jun. 30, 2019 USD ($) item
Regulatory Commitments [Abstract]
Number of States in our Territory			29
Number of auctions	2
Number of licenses			3
FCC Inquiry [Member]
Regulatory Commitments [Abstract]
Award in funding | $		$ 200
CAF Phase II [ Member]
Regulatory Commitments [Abstract]
Annual support offered by the Federal Communications Commission | $			$ 332
Number of households to be serviced under regulatory funded programs			774,000
INDIANA
Regulatory Commitments [Abstract]
Number of licenses			2
WEST VIRGINIA
Regulatory Commitments [Abstract]
Number of licenses			1
CTF Transaction [Member] | Northwest Operations [Member]
Regulatory Commitments [Abstract]
Annual support offered by the Federal Communications Commission | $			$ 19