The change in the net carrying amount of goodwill for the first quarter of 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 and other		-		(2	)		-		(2	)
Balance at April 4, 2026	$	675	$	2,823		$	797	$	4,295

Nucor completed its most recent annual goodwill impairment testing as of the first day of the fourth quarter of 2025 and concluded that as of such date there was no impairment of goodwill for any of its reporting units.

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 April 4, 2026 and December 31, 2025 (in millions):


	April 4, 2026				December 31, 2025
	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Customer relationships	$	4,381	$	1,731	$	4,444	$	1,737
Trademarks and trade names		373		211		374		207
Other		136		131		142		136
	$	4,890	$	2,073	$	4,960	$	2,080

Intangible asset amortization expense in the first quarter of 2026 and 2025 was $63 million and $65 million, respectively. Annual amortization expense is estimated to be $249 million in 2026; $246 million in 2027; $224 million in 2028; $201 million in 2029; $194 million in 2030; and $172 million in 2031.