Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Change in Carrying Amount of Goodwill

For the years ended December 31, 2022 and 2021, the carrying amounts of goodwill changed as follows:

($ in millions)	Ingalls		Newport News		Mission Technologies		Total
Balance as of December 31, 2020	$	175	$	721	$	721	$	1,617
Acquisitions	—		—		1,024		1,024
Adjustments	—		—		(13)		(13)
Balance as of December 31, 2021	175		721		1,732		2,628
Adjustments	—		—		(10)		(10)
Balance as of December 31, 2022	$	175	$	721	$	1,722	$	2,618