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Goodwill

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

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


(Dollars in millions)	AST		NC&C		IMS		Total
Balance as of December 31, 2020	$	363	$	275	$	419	$	1,057
Acquisitions	14		—		—		14
Balance as of September 30, 2021	377		275		419		1,071

The acquisition increase is the result of acquiring substantially all the assets of Ascendant Engineering Solutions (AES), a gimbal producer located in Austin, TX. The purchase closed on July 28, 2021 for a purchase price of $11 million with an additional of $5 million of contingent consideration predicated on the achievement of certain financial and operational targets.