The change in the net carrying amount of goodwill for the six months ended July 4, 2026 by segment was as follows (in millions):


	Steel Mills		Steel Products			Raw Materials		Total
Balance at December 31, 2025	$	675	$	2,825		$	797	$	4,297
Translation		-		(8	)		-		(8	)
Balance at July 4, 2026	$	675	$	2,817		$	797	$	4,289

Intangible assets with estimated useful lives of five to 25 years are amortized on a straight-line or accelerated basis and consisted of the following as of July 4, 2026 and December 31, 2025 (in millions):


	July 4, 2026				December 31, 2025
	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Customer relationships	$	4,382	$	1,787	$	4,444	$	1,737
Trademarks and trade names		373		217		374		207
Other		136		133		142		136
	$	4,891	$	2,137	$	4,960	$	2,080

Intangible asset amortization expense in the second quarter of 2026 and 2025 was $63 million and $63 million, respectively, and $126 million and $128 million in the first six months of 2026 and 2025, respectively. Annual amortization expense is estimated to be $249 million in 2026; $246 million in 2027; $224 million in 2028; $201 million in 2029; and $194 million in 2030; and $172 million in 2031.