Goodwill, Customer Relationships and Other Intangible Assets (Tables)

9 Months Ended

Sep. 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:

	September 30, 2019		December 31, 2018
	(Dollars in millions)
Goodwill	$	7,389	11,119
Customer relationships, less accumulated amortization of $1,355 and $833	$	7,026	7,567
Other intangible assets subject to amortization:
Trade names, less accumulated amortization of $50 and $30	80		100
Developed technology, less accumulated amortization of $121 and $67	378		310
Total other intangible assets, net	$	458	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 three months)	$	205
2020	825
2021	825
2022	764
2023	743

Schedule of Goodwill

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

	(Dollars in millions)
As of December 31, 2018	$	11,119
Effect of foreign currency rate change and other	(22		)
Impairment	(3,708		)
As of September 30, 2019	$	7,389