The components of, and changes in, the carrying amount of goodwill are as follows:


(MILLIONS OF DOLLARS)	U.S.		International		Total
Balance, December 31, 2025	$	1,515	$	1,259	$	2,774


Other(a)	—		(3)		(3)
Balance, June 30, 2026	$	1,515	$	1,256	$	2,771

The gross goodwill balance was $3,307 million and $3,310 million as of June 30, 2026 and December 31, 2025, respectively. Accumulated goodwill impairment losses were $536 million as of June 30, 2026 and December 31, 2025.

The components of identifiable intangible assets are as follows:


	As of June 30, 2026						As of December 31, 2025
					Identifiable						Identifiable
	Gross				Intangible Assets		Gross				Intangible Assets
	Carrying		Accumulated		Less Accumulated		Carrying		Accumulated		Less Accumulated
(MILLIONS OF DOLLARS)	Amount		Amortization		Amortization		Amount		Amortization		Amortization
Finite-lived intangible assets:
Developed technology rights	$	1,932	$	(1,410)	$	522	$	1,940	$	(1,352)	$	588
Brands and tradenames	362		(256)		106		362		(251)		111
Other	292		(216)		76		293		(211)		82
Total finite-lived intangible assets	2,586		(1,882)		704		2,595		(1,814)		781
Indefinite-lived intangible assets:
Brands and tradenames	67		—		67		67		—		67
In-process research and development	141		—		141		144		—		144
Product rights	6		—		6		6		—		6
Total indefinite-lived intangible assets	214		—		214		217		—		217
Identifiable intangible assets	$	2,800	$	(1,882)	$	918	$	2,812	$	(1,814)	$	998

Amortization expense related to finite-lived acquired intangible assets that contribute to our ability to sell, manufacture, research, market and distribute products, compounds and intellectual property is included in Amortization of intangible assets as it benefits multiple business functions. Amortization expense related to finite-lived acquired intangible assets that are associated with a single function is included in Cost of sales, Selling, general and administrative expenses or Research and development expenses, as appropriate. Total amortization expense for finite-lived intangible assets was $38 million and $77 million for the three and six months ended June 30, 2026, respectively and $40 million and $80 million for the three and six months ended June 30, 2025, respectively.