Goodwill, Customer Relationships and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Acquired Intangible Assets Disclosure [Abstract]

Schedule of acquisition-related intangible assets

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

	March 31, 2018		December 31, 2017
	(Dollars in millions)
Goodwill	$	11,141	10,837
Customer relationships, less accumulated amortization of $300 and $126	8,206		8,845
Other intangible assets subject to amortization:
Trade names, less accumulated amortization of $11 and $4	119		126
Developed technology, less accumulated amortization of $22 and $9	271		252
Total other intangible assets, net	$	390	378

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

We estimate that total amortization expense for intangible assets for the successor years ending December 31, 2018 through 2022 will be as follows:

	(Dollars in millions)
2018 (remaining nine months)	$	599
2019	799
2020	799
2021	799
2022	787