Goodwill, Customer Relationships and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill

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

	June 30, 2018		December 31, 2017
	(Dollars in millions)
Goodwill	$	9,360	9,360
Customer relationships, less accumulated amortization of $4,577 and $4,337	$	1,122	1,362
Other intangible assets, less accumulated amortization of $1,663 and $1,619	$	344	379

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

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

	(Dollars in millions)
2018 (remaining six months)	$	284
2019	518
2020	451
2021	140
2022	36