Goodwill (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill by reportable segment are as follows:

(Dollars in millions)	ASC		IMS		Total
Balance at January 1, 2020 (1)	$	638	$	419	$	1,057
Acquisitions	—		—		—
Balance at December 31, 2020	638		419		1,057
Acquisitions	14		—		14
Balance at December 31, 2021	$	652	$	419	$	1,071

________________

(1)Goodwill is reported net of $2,362 million, and $606 million of accumulated impairments as of January 2020 for the ASC and IMS segments, respectively.