Goodwill, Customer Relationships and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill and other intangible assets

Goodwill, customer relationships and other intangible assets consisted of the following:

	As of December 31,
	2015		2014
	(Dollars in millions)
Goodwill	$	20,742	20,755
Customer relationships, less accumulated amortization of $5,648 and $4,682	3,928		4,893
Indefinite-life intangible assets	269		268
Other intangible assets subject to amortization
Capitalized software, less accumulated amortization of $1,778 and $1,533	1,248		1,338
Trade names and patents, less accumulated amortization of $20 and $196	38		41
Total other intangible assets, net	$	1,555	1,647

Schedule of estimated amortization expense for intangible assets

We estimate that total amortization expense for intangible assets for the years ending December 31, 2016 through 2020 will be as follows:

	(Dollars in millions)
2016	$	1,161
2017	1,056
2018	944
2019	827
2020	726

Schedule of goodwill attributable to segments

The following table shows the rollforward of goodwill assigned to our reportable segments from December 31, 2013 through December 31, 2015.

	Business			Consumer		Wholesale		Hosting		Total
	(Dollars in millions)
As of December 31, 2013	$	6,363		10,348		3,274		689		20,674
Purchase accounting adjustments	—			—		—		(11	)	(11	)
November 1, 2014 reorganization	4,022			(70	)	(3,274	)	(678	)	—
Acquisitions	92			—		—		—		92
As of December 31, 2014	$	10,477		10,278		—		—		20,755
Purchase accounting and other adjustments	(13		)	—		—		—		(13	)
As of December 31, 2015	$	10,464		10,278		—		—		20,742