Description Of Business And Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Description Of Business And Summary Of Significant Accounting Policies [Abstract]

Schedule Of Revenue From External Customers

	For the year ended December 31,
($ in millions)	2017		2016		2015
Data and Internet services	$	3,862	$	3,693	$	2,337
Voice services		2,864		2,886		2,022
Video services		1,304		1,244		285
Other		322		276		255
Customer revenue		8,352		8,099		4,899
Switched access and subsidy		776		797		677
Total revenue	$	9,128	$	8,896	$	5,576