Goodwill, Customer Relationships and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of acquisition-related intangible assets

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

	June 30, 2019		December 31, 2018
	(Dollars in millions)
Goodwill	$	7,408	11,119
Customer relationships, less accumulated amortization of $1,183 and $833	$	7,219	7,567
Other intangible assets subject to amortization:
Trade names, less accumulated amortization of $43 and $30	87		100
Developed technology, less accumulated amortization of $102 and $67	345		310
Total other intangible assets, net	$	432	410

Schedule of estimated amortization expense of finite-lived acquisition-related intangible assets

We estimate that total amortization expense for intangible assets for the years ending December 31, 2019 through 2023 will be as follows:

	(Dollars in millions)
2019 (remaining six months)	$	408
2020	816
2021	816
2022	812
2023	734

Schedule of Goodwill

The following table shows the rollforward of goodwill from December 31, 2018 through June 30, 2019:

	(Dollars in millions)
As of December 31, 2018	$	11,119
Effect of foreign currency rate change	(3		)
Impairment	(3,708		)
As of June 30, 2019	$	7,408