Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2017

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Revenues From External Customers

	For the three months ended
	March 31,
($ in millions)	2017		2016
Data and Internet services	$	993	$	587
Voice services		751		467
Video services		347		67
Other		68		68
Customer revenue		2,159		1,189
Switched access and subsidy		197		166
Total revenue	$	2,356	$	1,355