NOTE C – GOODWILL AND OTHER INTANGIBLE ASSETS

The gross carrying amount of goodwill and other intangible assets and the related accumulated amortization for intangible assets subject to amortization and accumulated write-offs of goodwill are as follows:



	As of March 31, 2019					As of December 31, 2018
(in millions)	Gross Carrying Amount		Accumulated Amortization/ Write-offs			Gross Carrying Amount		Accumulated Amortization/ Write-offs
Amortizable intangible assets
Technology-related	$	10,081	$	(5,327	)	$	10,197	$	(5,266	)
Patents	521		(397		)	520		(393		)
Other intangible assets	1,656		(987		)	1,666		(958		)
	$	12,258	$	(6,711	)	$	12,383	$	(6,617	)
Indefinite-lived intangible assets
Goodwill	$	18,079	$	(9,900	)	$	17,811	$	(9,900	)
IPR&D	781		—			486		—
Technology-related	120		—			120		—
	$	18,980	$	(9,900	)	$	18,417	$	(9,900	)

The following represents our goodwill balance by global reportable segment:



(in millions)	MedSurg			Rhythm and Neuro		Cardiovascular			Total
Balance as of December 31, 2018	$	2,063		$	1,924	$	3,925		$	7,911
Impact of foreign currency fluctuations and other changes in carrying amount	(2		)	—		(1		)	(2		)
Goodwill acquired	—			—		271			271
Balance as of March 31, 2019	$	2,061		$	1,924	$	4,195		$	8,179

Refer to Critical Accounting Policies and Estimates within Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations contained in our most recent Annual Report on Form 10-K for discussion of our annual goodwill and indefinite-lived intangible asset impairment testing.