Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Financial Data

	Three Months Ended
	March 31,						June 30,						September 30,						December 31,
	2016			2015			2016			2015			2016			2015			2016			2015
(dollars in millions except per share data)
Revenue	$	2,051		$	2,053		$	2,056		$	2,061		$	2,033		$	2,062		$	2,032		$	2,053
Costs and Expenses:
Network Access Costs	694			723			676			696			675			706			680			708
Network Related Expenses	338			356			339			363			337			369			332			344
Depreciation and Amortization	301			288			310			288			319			296			320			294
Selling, General and Administrative Expenses	356			370			357			364			348			364			346			369
Total Costs and Expenses	1,689			1,737			1,682			1,711			1,679			1,735			1,678			1,715
Operating Income	362			316			374			350			354			327			354			338
Other Income (Expense):
Interest Income	1			1			1			—			1			—			1			—
Interest Expense	(135		)	(180		)	(140		)	(165		)	(139		)	(145		)	(132		)	(152		)
Loss on Modification and Extinguishment of Debt	—			—			(40		)	(163		)	—			—			—			(55		)
Venezuela Deconsolidation Charge	—			—			—			—			—			(171		)	—			—
Other, net	(10		)	(10		)	(5		)	(17		)	1			6			(6		)	3
Total Other Expense	(144		)	(189		)	(184		)	(345		)	(137		)	(310		)	(137		)	(204		)
Income Before Income Taxes	218			127			190			5			217			17			217			134
Income Tax (Expense) Benefit	(90		)	(5		)	(34		)	(18		)	(74		)	(16		)	33			3,189
Net Income (Loss)	$	128		$	122		$	156		$	(13	)	$	143		$	1		$	250		$	3,323
Net Income (Loss) Per Share - Basic	$	0.36		$	0.35		$	0.44		$	(0.04	)	$	0.40		$	—		$	0.70		$	9.33
Net Income (Loss) Per Share - Diluted	$	0.36		$	0.35		$	0.43		$	(0.04	)	$	0.39		$	—		$	0.69		$	9.24