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 as of September 30, 2015 and December 31, 2014 are as follows:



	As of
	September 30, 2015					December 31, 2014
	Gross Carrying		Accumulated Amortization/			Gross Carrying		Accumulated Amortization/
(in millions)	Amount		Write-offs			Amount		Write-offs
Amortizable intangible assets
Technology-related	$	8,874	$	(3,952	)	$	8,406	$	(3,697	)
Patents	519		(354		)	519		(342		)
Other intangible assets	1,512		(584		)	875		(533		)
	$	10,905	$	(4,890	)	$	9,800	$	(4,572	)
Unamortizable intangible assets
Goodwill	$	16,368	$	(9,900	)	$	15,798	$	(9,900	)
In-process research and development (IPR&D)	93		—			181		—
Technology-related	120		—			197		—
	$	16,581	$	(9,900	)	$	16,176	$	(9,900	)

During the third quarter of 2015, we reclassified approximately $77 million of core technology not previously subject to amortization to amortizable intangible assets due to projected changes in the market for this technology. We tested the intangible asset for impairment prior to this reclassification and determined that the asset was not impaired.

In addition, during the third quarter of 2015, we reclassified $1 million of IPR&D not previously subject to amortization to amortizable intangible assets, as a result of regulatory approvals, for a total of $77 million of IPR&D assets not previously subject to amortization reclassified as amortizable intangible assets during the first nine months of 2015. The IPR&D reclassified to amortizable intangible assets during the first nine months of 2015 primarily related to the receipt of FDA approval of the WATCHMAN^® device.

The following represents our goodwill balance by global reportable segment:



(in millions)	Cardiovascular		Rhythm Management		MedSurg		Total
Balance as of December 31, 2014	$	3,426	$	290	$	2,182	$	5,898
Purchase price adjustments	—		2		—		2
Goodwill acquired	—		—		568		568
Balance as of September 30, 2015	$	3,426	$	292	$	2,750	$	6,468

Goodwill Impairment Testing

We test our goodwill balances during the second quarter of each year for impairment, or more frequently if indicators are present or changes in circumstances suggest that an impairment may exist.

In the second quarter of 2015, we performed our annual goodwill impairment test for all of our reporting units and concluded the fair value of each reporting unit exceeded its carrying value. As a result of the 2015 annual goodwill impairment test, we identified our global Electrophysiology reporting unit as being at higher risk of potential failure of the first step of the goodwill impairment test in future reporting periods. As of the date of our annual goodwill impairment test, our global Electrophysiology reporting unit had excess fair value over carrying value of approximately 28 percent and held $292 million of allocated goodwill. Also, as of the date of our annual goodwill impairment test, our global Cardiac Rhythm Management (CRM) reporting unit had excess fair value over carrying value of approximately 26 percent; however, due to goodwill impairment charges in prior years, no goodwill remains within our CRM reporting unit. Changes in our reporting units or in the structure of our business as a result of future reorganizations, acquisitions or divestitures of assets or businesses could result in future impairments of goodwill within our reporting units. Refer to Critical Accounting Policies and Estimates within our Management's Discussion and Analysis of Financial Condition and Results of Operations contained in Item 2 of this Quarterly Report on Form 10-Q for a discussion of key assumptions used in our testing.

On a quarterly basis, we monitor the key drivers of fair value to detect events or other changes that would warrant an interim impairment test of our goodwill. The key variables that drive the cash flows of our reporting units and amortizable intangibles are estimated revenue growth rates and levels of profitability. Terminal value growth rate assumptions, as well as the Weighted Average Cost of Capital (WACC) rate applied are additional key variables for reporting unit cash flows. These assumptions are subject to uncertainty, including our ability to grow revenue and improve profitability levels. Relatively small declines in the future performance and cash flows of a reporting unit or asset group or small changes in other key assumptions may result in the recognition of significant goodwill impairment charges. For example, as of the date of our annual goodwill impairment test, keeping all other variables constant, a combined increase of 50 basis points in the WACC along with a simultaneous decrease of 150 basis points in the long term growth rate applied would require that we perform the second step of the goodwill impairment test for our global Electrophysiology reporting unit. The estimates used for our future cash flows and discount rates represent management's best estimates, which we believe to be reasonable, but future declines in business performance may impair the recoverability of our goodwill.

Future events that could have a negative impact on the levels of excess fair value over carrying value of our reporting units include, but are not limited to:


•	decreases in estimated market sizes or market growth rates due to greater-than-expected declines in procedural volumes, pricing pressures, reductions in reimbursement levels, product actions, and/or competitive technology developments;


•	declines in our market share and penetration assumptions due to increased competition, an inability to develop or launch new and next-generation products and technology features in line with our commercialization strategies, and market and/or regulatory conditions that may cause significant launch delays or product recalls;


•	decreases in our forecasted profitability due to an inability to successfully implement and achieve timely and sustainable cost improvement measures consistent with our expectations;


•	negative developments in intellectual property litigation that may impact our ability to market certain products or increase our costs to sell certain products;


•	the level of success of ongoing and future research and development efforts, including those related to recent acquisitions, and increases in the research and development costs necessary to obtain regulatory approvals and launch new products;


•	the level of success in managing the growth of acquired companies, achieving sustained profitability consistent with our expectations, establishing government and third-party payer reimbursement, supplying the market, and increases in the costs and time necessary to integrate acquired businesses into our operations successfully;


•	changes in our reporting units or in the structure of our business as a result of future reorganizations, acquisitions or divestitures of assets or businesses; and


•	increases in our market-participant risk-adjusted WACC, and increases in our market-participant tax rate, and/or changes in tax laws or macroeconomic conditions.

Negative changes in one or more of these factors, among others, could result in impairment charges.

The following is a rollforward of accumulated goodwill write-offs by global reportable segment:



(in millions)	Cardiovascular			Rhythm Management			MedSurg			Total
Accumulated write-offs as of December 31, 2014	$	(1,479	)	$	(6,960	)	$	(1,461	)	$	(9,900	)
Goodwill written off	—			—			—			—
Accumulated write-offs as of September 30, 2015	$	(1,479	)	$	(6,960	)	$	(1,461	)	$	(9,900	)

Intangible Asset Impairment Testing

2015 Charges

During the third quarter of 2015, we performed our annual impairment test of all IPR&D projects and our indefinite-lived core technology assets. Indefinite-lived intangible assets are tested for impairment on an annual basis during the third quarter of each year, or more frequently if impairment indicators are present, in accordance with U.S. GAAP and our accounting policies described in our 2014 Annual Report on Form 10-K. In addition, as a result of revised estimates in conjunction with our annual operating plan, we performed an interim impairment test of certain definite-lived core technology associated with certain of our acquisitions. Based on the results of our testing, we recorded impairment charges of $10 million in the third quarter of 2015.

During the second quarter of 2015, in conjunction with our annual strategic planning process and annual goodwill impairment test, we performed an interim impairment test on certain of our IPR&D projects and core technology assets. Based on our impairment assessment, we recorded an impairment charge of $9 million in the second quarter of 2015.

2014 Charges

During the third quarter of 2014, we performed our annual impairment test of all IPR&D projects, and our indefinite-lived core technology assets. Based on the results of our annual test, we recorded total impairment charges of $4 million to write-down the balances of certain in-process projects to their fair value. In addition, as a result of revised estimates in conjunction with our annual operating plan, we performed an interim impairment test of core technology associated with certain of our acquisitions, and we recorded an impairment charge of $8 million, for a total of $12 million of impairment charges in the third quarter of 2014.

During the second quarter of 2014, as a result of revised estimates developed in conjunction with our annual strategic planning process and annual goodwill impairment test, we performed an interim impairment test of our IPR&D projects and core technology associated with certain of our acquisitions. Based on our impairment assessment, and lower expected future cash flows associated with our intangible assets, we recorded pre-tax impairment charges of $110 million in the second quarter of 2014. As a result of changes in our clinical strategy and lower estimates of the European and global hypertension markets, and the resulting amount of future revenue and cash flows associated with the technology acquired from Vessix Vascular Inc. (Vessix), we recorded impairment charges of $67 million related to technology intangible assets during the second quarter of 2014. In addition, in the second quarter of 2014, due to revised expectations and timing as a result of the announcement of a third FDA Circulatory System Devices Panel, we recorded impairment charges of $35 million related to the IPR&D intangible assets acquired from Atritech, Inc. (Atritech). We also recorded an additional $8 million intangible asset impairment charge associated with changes in the amount of the expected cash flows related to certain other acquired IPR&D projects.

During the first quarter of 2014, as a result of lower estimates of the resistant hypertension market following the announcement of data from a competitor's clinical trial, we performed an interim impairment test of our IPR&D projects and core technology associated with our acquisition of Vessix. The impairment assessments were based upon probability-weighted cash flows of potential future scenarios. Based on our impairment assessment, and lower expected future cash flows associated with our Vessix-related intangible assets, we recorded pre-tax impairment charges of $55 million in the first quarter of 2014 to write-down the balance of these intangible assets to their calculated fair value.

The nonrecurring Level 3 fair value measurements of our intangible asset impairment analysis included the following significant unobservable inputs:



Intangible Asset	Valuation Date	Fair Value	Valuation Technique	Unobservable Input	Rate
Core Technology	September 30, 2015	$8 million	Income Approach -Excess Earnings Method	Discount Rate	10%
In-Process R&D	June 30, 2015	$6 million	Income Approach - Excess Earnings Method	Discount Rate	16.5 - 20%
In-Process R&D	September 30, 2014	$16 million	Income Approach - Excess Earnings Method	Discount Rate	16.5 - 20%
In-Process R&D	June 30, 2014	$83 million	Income Approach - Excess Earnings Method	Discount Rate	16.5 - 20%
Core Technology	June 30, 2014	$8 million	Income Approach - Excess Earnings Method	Discount Rate	15%
In-Process R&D	March 31, 2014	$6 million	Income Approach - Excess Earnings Method	Discount Rate	20%
Core Technology	March 31, 2014	$64 million	Income Approach - Excess Earnings Method	Discount Rate	15%