Segment Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Schedule of segment information

The following table summarizes our segment results for 2015, 2014 and 2013 based on the segment categorization we were operating under at December 31, 2015.

	Years Ended December 31,
	2015			2014		2013
	(Dollars in millions)
Total segment revenues	$	16,668		17,028		17,095
Total segment expenses	8,459			8,509		8,167
Total segment income	$	8,209		8,519		8,928
Total margin percentage	49		%	50	%	52	%
Business segment:
Revenues	$	10,647		11,034		11,091
Expenses	6,034			6,089		5,808
Income	$	4,613		4,945		5,283
Margin percentage	43		%	45	%	48	%
Consumer segment:
Revenues	$	6,021		5,994		6,004
Expenses	2,425			2,420		2,359
Income	$	3,596		3,574		3,645
Margin percentage	60		%	60	%	61	%

Schedule of operating revenues by products and services

Our operating revenues for our products and services consisted of the following categories for the years ended December 31, 2015, 2014 and 2013:

	Years Ended December 31,
	2015		2014	2013
	(Dollars in millions)
Strategic services
Business high-bandwidth data services (1)	$	2,816	2,579	2,230
Business low-bandwidth data services (2)	2,052		2,345	2,577
Business hosting services (3)	1,281		1,316	1,259
Other business strategic services (4)	162		76	60
Consumer high-speed Internet services (5)	2,611		2,469	2,358
Other consumer strategic services (6)	421		381	292
Total strategic services revenues	9,343		9,166	8,776
Legacy services
Business legacy voice services (7)	2,590		2,780	2,916
Other business legacy services (8)	1,175		1,252	1,398
Consumer legacy voice services (7)	2,676		2,864	3,101
Other consumer legacy services (9)	311		276	248
Total legacy services revenues	6,752		7,172	7,663
Data integration
Business data integration	571		686	651
Consumer data integration	2		4	5
Total data integration revenues	573		690	656
Other revenues
High-cost support revenue (10)	732		528	547
Other revenue (11)	500		475	453
Total other revenues	1,232		1,003	1,000
Total revenues	$	17,900	18,031	18,095

Schedule of reconciliation from segment income to consolidated net income

The following table reconciles segment income to net income for the years ended December 31, 2015, 2014 and 2013:

	Years Ended December 31,
	2015			2014		2013
	(Dollars in millions)
Total segment income	$	8,209		8,519		8,928
Other operating revenues	1,232			1,003		1,000
Depreciation and amortization	(4,189		)	(4,428	)	(4,541	)
Impairment of goodwill	—			—		(1,092	)
Other unassigned operating expenses	(2,647		)	(2,684	)	(2,842	)
Other expenses, net	(1,289		)	(1,300	)	(1,229	)
Income tax expense	(438		)	(338	)	(463	)
Net income (loss)	$	878		772		(239	)