Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in goodwill were as follows for the years ended December 31, 2021 and 2020:

(Dollars in millions)	Goodwill
Beginning balance at December 31, 2019	$	138
Acquisitions	5
Ending balance at December 31, 2020	$	143
Acquisitions	232
Ending balance at December 31, 2021	$	375

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination

The following table presents the gross carrying amount and accumulated amortization of other intangible assets as of December 31, 2021 and 2020:

	December 31, 2021						December 31, 2020
(Dollars in millions)	Gross Amount		Accumulated Amortization		Net Carrying Amount		Gross Amount		Accumulated Amortization		Net Carrying Amount
Other intangible assets:
Customer relationships	$	135	$	16	$	119	$	42	$	8	$	34
Other	57		16		41		36		9		27
Total other intangible assets, net	$	192	$	32	$	160	$	78	$	17	$	61

Finite-lived Intangible Assets Amortization Expense

For the year ended December 31, 2021, we recorded amortization expense of $15 million. Assuming no future impairments of other intangible assets or additional acquisitions or dispositions, the following table presents the Company's future expected amortization expense for other intangible assets that will continue to be amortized as of December 31, 2021:

Years ended December 31, (Dollars in millions)	Other Intangible Assets
2022	$	25
2023	22
2024	20
2025	17
2026 and thereafter	76
Total future amortization expense	$	160