Goodwill, Customer Relationships and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill, customer relationships and other intangible assets

Goodwill and other intangible assets consisted of the following:

	As of December 31,
	2023		2022
	(Dollars in millions)
Goodwill(1)	$	6,955	$	9,360
Other intangible assets, less accumulated amortization of $1,966 and $1,924	$	103	$	138

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(1)We recorded a cumulative non-cash, non-tax-deductible goodwill impairment charge of $2.4 billion during the year ended December 31, 2023.

Schedule of Goodwill

The following table shows the rollforward of goodwill from December 31, 2021 through December 31, 2023:

	(Dollars in millions)
As of December 31, 2021	$	9,360
As of December 31, 2022	9,360
Impairment	(2,405)
As of December 31, 2023(1)	$	6,955

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(1)Goodwill at December 31, 2023 is net of accumulated impairment losses of $2.4 billion.

Schedule of estimated amortization expense for intangible assets

We estimate that total amortization expense for intangible assets for the years ending December 31, 2024 through 2028 will be as follows:

	(Dollars in millions)
Year ending December 31,
2024	$	44
2025	16
2026	10
2027	7
2028	5