Goodwill and Other Purchased Intangible Assets

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

8. GOODWILL AND OTHER PURCHASED INTANGIBLE ASSETS

Goodwill

Changes in the carrying amounts of goodwill for the years ended December 31, 2021 and 2022, were as follows:

$ in millions	Aeronautics Systems		Defense Systems		Mission Systems		Space Systems		Total
Balance as of December 31, 2020	$	3,467	$	3,415	$	5,881	$	4,755	$	17,518
Other (1)	—		(3)		—		—		(3)
Balance as of December 31, 2021	$	3,467	$	3,412	$	5,881	$	4,755	$	17,515
Other (1)	—		1		—		—		1
Balance as of December 31, 2022	$	3,467	$	3,413	$	5,881	$	4,755	$	17,516

(1)Other consists primarily of adjustments for foreign currency translation.

At December 31, 2022 and 2021, accumulated goodwill impairment losses totaled $417 million and $153 million at Aeronautics Systems and Space Systems, respectively.

Other Purchased Intangible Assets

Net customer-related and other intangible assets are as follows:

	December 31
$ in millions	2022		2021
Gross customer-related and other intangible assets	$	3,364	$	3,361
Less accumulated amortization	(2,980)		(2,783)
Net customer-related and other intangible assets	$	384	$	578

Amortization expense for 2022, 2021 and 2020, was $197 million, $204 million and $262 million, respectively. As of December 31, 2022, the expected future amortization of purchased intangibles for each of the next five years is as follows:

$ in millions
2023	$	80
2024	57
2025	45
2026	42
2027	31