Goodwill and Other Purchased Intangible Assets

12 Months Ended

Dec. 31, 2023

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, 2022 and 2023, were as follows:

$ in millions	Aeronautics Systems		Defense Systems		Mission Systems		Space Systems		Total
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
Other (1)	—		1		—		—		1
Balance as of December 31, 2023	$	3,467	$	3,414	$	5,881	$	4,755	$	17,517

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

At December 31, 2023 and 2022, 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	2023		2022
Gross customer-related and other intangible assets	$	3,365	$	3,364
Less accumulated amortization	(3,060)		(2,980)
Net customer-related and other intangible assets	$	305	$	384

Amortization expense for 2023, 2022 and 2021, was $80 million, $197 million and $204 million, respectively. As of December 31, 2023, the expected future amortization of purchased intangibles for each of the next five years is as follows:

$ in millions
2024	$	57
2025	45
2026	42
2027	31
2028	31