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

12 Months Ended

Dec. 31, 2016

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

Schedule Of Revenue From External Customers

	For the year ended
	December 31,
($ in millions)	2016		2015		2014
Voice services	$	2,886	$	2,022	$	1,951
Data and Internet services		3,693		2,337		1,948
Video services		1,244		285		134
Other		276		255		220
Customer revenue		8,099		4,899		4,253
Switched access and subsidy		797		677		519
Total revenue	$	8,896	$	5,576	$	4,772