Goodwill, Customer Relationships and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill

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

	September 30, 2021		December 31, 2020
	(Dollars in millions)
Goodwill	$	9,360	9,360
Customer relationships, less accumulated amortization of $5,699 and $5,611	$	—	88
Other intangible assets, less accumulated amortization of $1,859 and $1,831	215		255
Total other intangible assets, net	$	215	343

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

We estimate that total amortization expense for intangible assets for the years ending December 31, 2021 through 2025 will be as follows:

	(Dollars in millions)
2021 (remaining three months)	$	21
2022	86
2023	62
2024	13
2025	11