5. Goodwill and Other Intangible Assets

Goodwill

The following table summarizes the changes in the carrying amount of goodwill by segment and in total:



(in millions)	Pharmaceutical		Medical			Total
Balance at June 30, 2018	$	2,621	$	5,695		$	8,316
Goodwill acquired, net of purchase price adjustments	—		6			6
Foreign currency translation adjustments and other	—		(3		)	(3		)
Balance at September 30, 2018	$	2,621	$	5,698		$	8,319

Other Intangible Assets

The following tables summarize other intangible assets by class at:



	September 30, 2018
(in millions)	Gross Intangible		Accumulated Amortization		Net Intangible		Weighted- Average Remaining Amortization Period (Years)
Indefinite-life intangibles:
IPR&D, trademarks and other	$	59	$	—	$	59	N/A
Total indefinite-life intangibles	59		—		59		N/A

Definite-life intangibles:
Customer relationships	3,512		1,272		2,240		14
Trademarks, trade names and patents	667		258		409		14
Developed technology and other	1,560		494		1,066		11
Total definite-life intangibles	5,739		2,024		3,715		13
Total other intangible assets	$	5,798	$	2,024	$	3,774	N/A



	June 30, 2018
(in millions)	Gross Intangible		Accumulated Amortization		Net Intangible
Indefinite-life intangibles:
IPR&D, trademarks and other	$	62	$	—	$	62
Total indefinite-life intangibles	62		—		62

Definite-life intangibles:
Customer relationships	3,513		1,191		2,322
Trademarks, trade names and patents	667		246		421
Developed technology and other	1,562		454		1,108
Total definite-life intangibles	5,742		1,891		3,851
Total other intangible assets	$	5,804	$	1,891	$	3,913

Total amortization of intangible assets was $133 million and $135 million for the three months ended September 30, 2018 and 2017, respectively. Estimated annual amortization of intangible assets for the remainder of fiscal 2019 through 2023 is as follows: $396 million, $501 million, $433 million, $398 million, and $349 million.