UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934, or
For the fiscal year ended December 31, 20162018
o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Commission File No. 1-11083
BOSTON SCIENTIFIC CORPORATION
(Exact name of registrant as specified in its charter)
DELAWARE 04-2695240
(State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.)
300 BOSTON SCIENTIFIC WAY, MARLBOROUGH, MASSACHUSETTS 01752-1234
(Address of principal executive offices) (zip code)
(508) 683-4000
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
COMMON STOCK, $.01 PAR VALUE PER SHARE NEW YORK STOCK EXCHANGE
(Title of each class) (Name of exchange on which registered)
Securities registered pursuant to Section 12(g) of the Act:
NONE
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes: þ No o
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes: o No þ
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes: þ No o
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorted period that the registrant was required to submit and post such files). Yes: þ No o
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. o
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer” andfiler,” “smaller reporting company”company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer þ
 
Accelerated filer o
 
Non-accelerated filer o
(Do not check if a smaller reporting company)
Smaller reporting company o
Emerging growth company o
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes: o No þ
The aggregate market value of the registrant’s common stock held by non-affiliates was approximately $31.6$45.0 billion based on the last reported sale price of $23.37$32.70 of the registrant’s common stock on the New York Stock Exchange on June 30, 2016,29, 2018, the last business day of the registrant’s most recently completed second fiscal quarter. (For this computation, the registrant has excluded the market value of all shares of common stock of the registrant reported as beneficially owned by executive officers, directors and the director emeritusdirectors of the registrant; such exclusion shall not be deemed to constitute an admission that any such person is an affiliate of the registrant.)
The number of shares outstanding of the registrant’s common stock as of January 31, 20172019 was 1,363,488,640.



1,385,961,926.
Documents Incorporated by Reference
Portions of the registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission in connection with its 20172019 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.




TABLE OF CONTENTS

   
   
 
   
 
   
 
   
 
   
 
 



PART I

ITEM 1. BUSINESS

TheOur Company

Boston Scientific Corporation is a worldwideglobal developer, manufacturer and marketer of medical devices that are used in a broad range of interventional medical specialties. Our mission is to transform lives through innovative medical solutions that improve the health of patients around the world. As a medical technology leader for nearly 40 years, we advance science for life by providing a broad range of high performance solutions to address unmet patient needs and reduce the cost of healthcare. When used in this report, the terms “we,” “us,” “our”"we," "us," "our" and “the Company”"the Company" mean Boston Scientific Corporation and its divisions and subsidiaries.

Our history began in the late 1960s when our co-founder, John Abele, acquired an equity interest in Medi-tech, Inc., a research and development company focused on developing alternatives to surgery. In 1969, Medi-tech introduced a family of steerable catheters used in some of the world's first less-invasive procedures performed.procedures. In 1979, John Abele joined with Pete Nicholas to form Boston Scientific Corporation, which indirectly acquired Medi-tech. This acquisition began a period of active and focused new product development, innovation, market development and organizational growth. Since then, we have advanced the practice of less-invasive medicine by helping physicians and other medical professionals diagnose and treat a wide range of diseases and medical conditions and improve patients’ quality of life by providing alternatives to surgery and other medical procedures that are typically traumatic to the body.

Our net sales have increased substantially since our formation. Our growth has been fueled in part by strategic acquisitions designed to improve our ability to take advantage of growth opportunities in the medical device industry and to build depth of portfolio within our focuscore businesses. OurThese strategic acquisitions have helped us to add promising new technologies to our pipeline and to offer one of the broadest product portfolios in the world for use in less-invasive procedures in our targetcore areas of Cardiovascular,Medical Surgical (MedSurg), Rhythm Management, and Medical Surgical.Neuro, and Cardiovascular. We believe that the depth and breadth of our product portfolio has also enabled us to compete more effectively in the current healthcare environment that seeks to improve outcomes and lower costs. Our strategy of category leadership also enables us to compete in a changing, contracting landscape and position our products with physicians, managed care, large buying groups, governments and consolidation among hospitals, while also expanding internationally and managing the complexities of the global healthcare market.

Business Strategy

We operate followingpursuant to five strategic imperatives: Strengthen Execution to Grow Share,Category Leadership, Expand into High Growth Adjacencies, Drive Global Expansion, Fund the Journey to Fuel Growth and Develop Key Capabilities. We believe that our execution of these strategic imperatives will drive innovation, accelerate profitable revenue growth and increase stockholder value.value while strengthening our leadership position in the medical device industry.

We expect to continue to invest in our core franchises and pursue opportunities to diversify and further expand our presence in strategic growth adjacencies and new global markets. Our approach to innovation combines internally-developed products and technologies with those we may obtain externally through strategic acquisitions, alliances and alliances.other investments. Our research and development efforts are focused largely on the development of next-generation and novel technology offerings across multiple programs and divisions. In addition, we have undertaken several strategic acquisitions to help us to continue to be a leader in the medical device industry. We expect to continue to invest in our core franchises, and also investigate opportunities to further expand our presence in, and diversify into, strategic growth adjacencies and new global markets. During the lastpast several years, we have completed multiplenumerous acquisitions to strengthenin support of our growth strategy, both strengthening our core franchises and expandexpanding into high growth adjacencies and globaladjacent markets. To support

Our Enterprise Risk Management program analyzes the achievement ofkey risks inherent to achieving our strategic and organizational objectives, we have an Enterprise Risk Management program that coordinates a consolidated view of the key risks inherent in achieving our business strategies so we canimperatives. Such risk assessment helps us to anticipate and adapt to potential challenges to preserve and grow shareholder value. Our Board of Directors oversees our risk management program and focuses on the most significant risks facing the Company, including strategic, operational, financial, and legal and compliance risksrisks.

Products

During 2016,In 2018, our products were offered for sale by seven core businesses: Interventional Cardiology, Cardiac Rhythm Management, Endoscopy, Peripheral Interventions, Urology and Pelvic Health, Peripheral Interventions, Neuromodulation and Electrophysiology. During 2016, we derived 27In 2018, our revenue was comprised of 26 percent of our sales from our Interventional Cardiology business, 2220 percent of our sales from our Cardiac Rhythm Management business, 1718 percent of our sales from our Endoscopy business, 1213 percent of our sales from our Peripheral Interventions business, 12 percent of our sales from our Urology and Pelvic Health business, seven12 percent offrom our salesPeripheral Interventions business, eight percent from our Neuromodulation business and three percent of our sales from our Electrophysiology business.


Our seven core businesses are organized into three reportable segments: MedSurg, Rhythm and Neuro, and Cardiovascular. Effective January 1, 2018, following organizational changes to align the structure of our business with our focus on active implantable devices, we revised our reportable segments, in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 280, Segment Reporting. The revision reflects a reclassification of our Neuromodulation business from our Medical Surgical (MedSurg) segment to our newly created Rhythm and Neuro segment. We have revised prior year amounts to conform to the current year’s presentation (as denoted with an asterisk (*) throughout). There was no revision to operating segments or reporting units as a result of the organizational change.

The following section describes certainour principal product offerings by reportable segment.

MedSurg

Endoscopy

Gastroenterology and Pulmonary

Our Endoscopy business develops and manufactures devices to diagnose and treat a broad range of gastrointestinal (GI) and pulmonary conditions with innovative, less invasive technologies. Our product offerings include:

our SpyGlass™ DS System, which brings digital imaging, a wider field of view and a simpler set-up (compared to our legacy SpyGlass System), thus enabling cholangioscopy to play a greater role in the diagnosis and treatment of pancreatico-biliary diseases,
our Resolution 360™ Clip, a hemostatic clipping technology designed to stop and help prevent bleeding during endoscopic procedures,
our Epic™ Biliary Endoscopic Stent System, indicated for the palliation of malignant strictures, is our first laser cut self-expanding metal stent and complements our braided metal stent portfolio,
our Acquire™ Endoscopic Ultrasound Fine Needle Biopsy Device, which is designed to obtain larger tissue specimens for histological assessment and is useful when diagnosing diseases such as pancreatic cancer, liver cancer and stomach lesions,
our AXIOS™ Stent and Electrocautery Enhanced Delivery System, the first, and currently only, stent in the U.S. indicated for endoscopic drainage of pancreatic pseudocysts,
our infection prevention portfolio, which includes a customizable Compliance EndoKit™ and single-use Orca™ Valves, designed to minimize the risk of infection transmission and improve operational efficiencies by streamlining manual cleaning or eliminating the need for cleaning and tracking, and
our endoluminal surgery portfolio with ORISE™ Tissue Retractor System, designed to enable tissue retraction and countertraction during en bloc colonic tissue resection procedures and ORISE™ Gel, designed to be used for submucosal lift of polyps, adenomas, early-stage cancers or other gastrointestinal mucosal lesions prior to excision with a snare or other endoscopic device.

Urology and Pelvic Health

Our Urology and Pelvic Health business develops and manufactures devices to treat various urological and pelvic conditions for both male and female anatomies, including kidney stones, benign prostatic hyperplasia (BPH), prostate cancer, erectile dysfunction, male incontinence, pelvic floor disorders, abnormal uterine bleeding and uterine fibroids and polyps. Our product offerings include:

a full line of stone management products, including ureteral stents, catheters, baskets, guidewires, sheaths and balloons and stone laser devices,
our LithoVue™ Single-Use Digital Flexible Ureteroscope, which delivers detailed high-resolution digital images for high-quality visualization and seamless navigation,
penile implants to treat erectile dysfunction and urinary control systems to treat male urinary incontinence, under our Men's Health portfolio,
our GreenLight XPS™ Laser System, our MoXy™ Fiber and our newly acquired Rezūm™ System, purchased as part of the NxThera, Inc. (NxThera) acquisition in the second quarter of 2018, under our BPH therapies,
a range of devices for the treatment of Women's Health conditions such as stress urinary incontinence, pelvic organ prolapse, heavy menstrual bleeding (menorrhagia) and uterine fibroids and polyps and
our SpaceOAR™ Hydrogel System, purchased as part of the Augmenix, Inc. (Augmenix) transaction in the fourth quarter of 2018, to help reduce side effects that men may experience after receiving radiotherapy to treat prostate cancer.


Rhythm and Neuro

Cardiac Rhythm Management

Our Cardiac Rhythm Management (CRM) business develops and manufactures a variety of implantable devices that monitor the heart and deliver electricity to treat cardiac abnormalities. Our product offerings include:

our implantable cardioverter defibrillators (ICD) and implantable cardiac resynchronization therapy defibrillators (CRT-D) as well as the world's first, and currently only, commercially available subcutaneous implantable cardiac defibrillators (S-ICD),
our pacemakers and implantable cardiac resynchronization therapy pacemakers (CRT-P) and
our LATITUDE™ Remote Patient Management System, which allows for more frequent monitoring and better guided treatment decisions by enabling physicians in most geographies to monitor implantable system performance remotely.

Our entire transvenous defibrillator portfolio leverages our EnduraLife™ Battery Technology, including our extended longevity (EL) ICD, our CRT-D’s and our MINI (smallest and thinnest) ICD.

Our most current generation of defibrillators, the RESONATE™ family of devices, is available in most major markets around the world. These devices include our proprietary HeartLogic™ Heart Failure (HF) Diagnostic, EnduraLife Battery Technology and SmartCRT™ with Multisite pacing in CRT-D. Magnetic resonate imaging (MRI) conditional labeling, which was approved by the U.S. Food and Drug Administration (FDA) in September 2017 and launched in the fourth quarter of 2017, covers our current generation RESONATE family of devices, as well as our prior generation of DYNAGEN™ and INOGEN™ devices. We have MRI conditional labeling across our defibrillator portfolio in most major markets around the world, when used with our current generation of leads. Our implantable defibrillator portfolio is complemented by our suite of ACUITY™ X4 Quadripolar LV Leads, RELIANCE™ family of ICD Leads and INGEVITY™ Pacing Lead.

In addition to our transvenous defibrillator portfolio, we offer our EMBLEM™ MRI S-ICD System, which provides physicians the ability to treat patients who are at risk for sudden cardiac arrest without touching the heart or invading the vasculature. Our EMBLEM S-ICD devices have MRI conditional labeling and LATITUDE Remote Patient Management in most major markets.

We market our ACCOLADE™ family of pacemaker systems in nearly all major markets around the world. Approval of our product offerings. In addition, see Item 7. Management’s DiscussionACCOLADE Pacemaker family in the U.S., Europe and AnalysisJapan also included approval for use of Financial Conditionthese products in patients undergoing MRI scans. We received FDA approval of our ACCOLADE™ MRI-Compatible Pacemaker and Results of Operations of this Annual Report for further information onMRI-compatible INGEVITY™ Pacing Lead in April 2016. Much like our core businessesdefibrillator portfolio, our pacemakers leverage our INGEVITY Pacing Leads and products.LATITUDE™ Remote Patient Management in nearly all major markets.

Electrophysiology

Our Electrophysiology business develops and manufactures less-invasive medical technologies used in the diagnosis and treatment of rate and rhythm disorders of the heart, including a broad portfolio of therapeutic and diagnostic catheters and a variety of equipment used in the Electrophysiology lab. Our product offerings include:

our Rhythmia™ Mapping System, a next-generation, catheter-based, 3-D cardiac mapping and navigation solution designed to help diagnose and guide treatment of a variety of arrhythmias,
our Blazer™ Therapeutic Ablation Catheter line,
a broad portfolio of diagnostic catheters including Blazer™ Dx-20, Dynamic Tip™ and Viking™ Catheters,
intracardiac ultrasound catheters, delivery sheaths and other accessories and
a full offering of capital equipment used in Electrophysiology labs, such as recording systems, generators and pumps.

Our cooled ablation catheter portfolio includes our U.S. and CE Mark approved Blazer™ Open-Irrigated, IntellaNav™ Open-Irrigated, and IntellaNav MiFi™ Open-Irrigated ablation catheters with a unique Total Tip Cooling™ Design. We also offer our IntellaNav™ XP and IntellaNav™ MiFi XP solid tip catheters. Our IntellaTip™ MiFi XP, IntellaNav™ MiFi XP and IntellaNav™ MiFi Open-Irrigated Catheters include MicroFidelity (MiFi) sensor technology in the catheter tip. All of our IntellaNav Catheters are designed to allow magnetic tracking when used with our Rhythmia Mapping System.

Our capital equipment offerings include our Rhythmia Mapping System, LabSystem™ PRO Recording System, Maestro™ RF Generators and the MetriQ™ Pump. In 2015, the Rhythmia Mapping System and IntellaMap Orion™ Mapping Catheter began full global commercialization, bringing to market a next-generation system capable of high-density high-resolution mapping. We are now in full global commercialization of our next generation Rhythmia HDx™ Mapping System.

Neuromodulation

Our Neuromodulation business develops and manufactures devices to treat various neurological movement disorders and manage chronic pain. Our product offerings include:

our Precision™, Precision Spectra™, Precision Montage™, Precision Novi™ and Spectra WaveWriter™ Spinal Cord Stimulator (SCS) Systems, designed to provide improved pain relief to a wide range of patients who suffer from chronic pain and
our Vercise™, Vercise™ PC and Vercise Gevia™ Deep Brain Stimulation (DBS) Systems for the treatment of Parkinson's disease, tremor, and intractable primary and secondary dystonia, a neurological movement disorder characterized by involuntary muscle contractions.

The Precision Spectra SCS System is the world's first and only SCS system with 32 contacts and 32 dedicated power sources. We believe that we continue to have a technological advantage due to our proprietary features such as Multiple Independent Current Control and our Illumina 3D™ Proprietary Programming Software, which together are intended to allow the physician to target specific areas of pain and customize stimulation of nerve fibers more precisely. In 2015, we launched the Precision Novi SCS System in Europe and then in the U.S., offering the smallest 16-contact high capacity primary cell (PC) device, also referred to as non-rechargeable. In 2016, we launched the Precision Montage SCS System in Europe and the U.S. offering a 16-contact rechargeable system with Illumina 3D programming and full body MRI labeling when conditions of use are met. In January 2018, we announced FDA approval for the Spectra WaveWriter SCS System, the first and only system approved by the FDA to simultaneously provide paresthesia-based and sub-perception therapy.

In 2018, we began commercializing our Vercise™ DBS System in the U.S. following FDA approval in late 2017. The Vercise DBS System is approved in the U.S. as an adjunctive therapy that aids in reducing some of the symptoms of moderate to advanced Parkinson’s disease. We also have regulatory approval for our Vercise DBS System in various international regions including Europe, Latin America and Asia Pacific. Our Vercise Gevia™ DBS System with the Cartesia™ Directional Lead is the first and only MRI conditional, rechargeable and directional system, using multi-directional stimulation designed for greater precision, intended to minimize side effects for patients. The Cartesia Directional Lead continues to expand our market access in Europe, Japan and various countries in Latin America. In January 2019, Vercise Gevia DBS System with the Cartesia Directional Lead was approved by the FDA. In the third quarter of 2018, we received CE mark approval in Europe for GUIDE™ XT System, the first DBS visualization system built for directionality that utilizes patient specific anatomy and stimulation field modeling. This technology provides physicians with 3-D image planning capability and when used in conjunction with the Vercise DBS Systems, enables physicians to personalize and optimize DBS treatment.

Cardiovascular

Interventional Cardiology

Our Interventional Cardiology business develops and manufactures technologies for diagnosing and treating coronary artery disease and other cardiovascular disorders including structural heart conditions. Our broad, innovative product offerings have led to our leadership in the global interventional cardiology market.

Drug-Eluting Coronary Stent Systems

Our broad, innovative product offerings have enabled us to become a leader in the global interventional cardiology market. This leadership is due in large part to our drug-eluting coronary stent product offerings. Coronary stentsofferings are tiny, mesh tubes used in the treatmentan important element of coronary artery disease, which are implanted in patients to prop open arteries and facilitate blood flow to and from the heart.our global Interventional Cardiology market leadership. We believe we have further enhanced the outcomes associated with the use of coronary stents, particularly the processes that lead to restenosis (the growth of neointimal tissue within an artery after angioplasty and stenting), through our scientific research and product development of drug-eluting stent systems. Our coronary stent offerings include:

We market theour SYNERGY™ Everolimus-Eluting Platinum Chromium Coronary Stent System, featuring an ultra-thin abluminal (outer) bioabsorbable polymer coating. The SYNERGYcoating,
our Promus ELITE™ Everolimus-Eluting Stent is unique in that both its proprietary polymer and everolimus drug coating dissipate by three months. This innovation has the potential to improve post-implant vessel healing and will eliminate long-term polymer exposure, which is a possible cause of late adverse events. In addition, we market the
our Promus PREMIER™, Promus™ Element™ and Promus™ Element™ Plus Everolimus-Eluting family of Stents.

Other CoronaryComplex PCI Therapies

We marketOur product offerings to perform complex percutaneous coronary interventions (PCI) include a broad line of products used to treat patients with atherosclerosis, a principal cause of coronary artery obstructive disease, which is characterized by a thickening of the walls of the coronary arteries and a narrowing of arterial openings caused by the progressive development of deposits of plaque. Our product offeringsdisease. These include balloon catheters,

rotational atherectomy systems, guide wires, guide catheters, embolic protection devices, crossing and re-entry devices for the treatment of chronically occluded coronary vessels and diagnostic catheters used in percutaneous transluminal coronary angioplasty (PTCA) procedures.

PCI Guidance

We marketOur PCI Guidance offerings include a family of intravascular catheter-directed ultrasound imaging catheters, complemented by our intravascular ultrasound (IVUS) imaging system and our fractional flow reserve (FFR) devices and systems for use in coronary arteries and heart chambers as well as certain peripheral vessels.vessels to assist in the diagnosis of coronary artery disease. Our Intravascular UltrasoundPCI Guidance product offerings include:

our OptiCross™ IVUS Imaging catheter, OptiCross™, has been launched in all major markets worldwide. We initiated the launch of
our firstCOMET™ FFR product, the COMET™ Pressure Guidewire in the U.S., Europe, and Japan in 2016. The
our iLab™ Ultrasound Imaging System with Polaris Software, continues as our flagship consoledesigned to enhance the diagnosis and treatment of blocked vessels and other heart disorders, which is compatible with our full line of imaging catheters and FFR devices and are designedcontinues to enhance the diagnosis and treatment of blocked vessels and heart disorders. These systems havebe our flagship console.

The iLab Ultrasound Imaging System has been placed in cardiology labs worldwide and providedprovides an installed base through which we expect to continue to pull through products, including the ongoing launch of our COMET™ FFR Pressure Guidewire.sell associated single-use products.

Structural Heart Therapies

Structural heart therapy is one of the fastest growing segmentsareas of the medical technology market and is highly synergistic with our Interventional Cardiology and Rhythm Management businesses. Through the acquisition of Sadra Medical, Inc. (Sadra) in January 2011, we have developed a fully repositionable and retrievable device, the Lotus™ Valve System, for transcatheter aortic valve replacement (TAVR) to treat patients with severe aortic stenosis. The Lotus™ Valve System employs a unique Adaptive Seal™ feature designed to minimize the incidence of paravalvular regurgitation, a predictor of mortality. The Lotus™ Valve System is CE-marked in the European Union (EU). In the U.S. it is an investigational device and not available for commercial sale. At the end of 2015, we completed enrollment in our REPRISE III pivotal clinical trial. We have three valve sizes CE marked: 23, 25 and 27mm, and we are developing 21 and 29mm size valves to complete our size matrix. In September 2016, we commenced a limited launch of our next generation catheter and sheath, the Lotus EDGE™ Valve System, in Europe. In October 2016, we suspended our limited launch and initiated a voluntary removal of field inventory of the Lotus EDGE™ system due to reports that, in some cases, the device could not be fully locked during the procedure due to premature release of a pin connecting the Lotus EDGE™ Valve to the delivery system. In February 2017, we initiated a voluntary removal of all Lotus™ Valve devices, including Lotus with Depth Guard™, from global commercial and clinical sites due to reports of premature release of a pin connecting the Lotus™ Valve to the delivery system. As with the prior announced suspension of our Lotus Edge™ Valve System device, we believe that the issue is caused by excess tension in the pin mechanism introduced during the manufacturing process. We expect to bring the Lotus™ Valve platform back to market in Europe and other regions in the fourth quarter of 2017. We anticipate filing the U.S. PMA submission for the Lotus Edge™ Valve System, the next generation platform, in the fourth quarter of 2017, with a U.S. launch planned for mid-2018.Our current structural heart product offerings include:


Through the acquisition of Atritech, Inc. (Atritech) in March 2011, we have developed a novel device, the Watchman™our WATCHMAN™ Left Atrial Appendage Closure (LAAC) Device,Technology (WATCHMAN), designed to close the left atrial appendage to reduce the risk of ischemic stroke in patients with non-valvular atrial fibrillation (AF). Watchman Devicewho are at risk for ischemic stroke,
our ACURATE TA™, ACURATE neo™, ACURATE neo2™ and ACURATE TF™ Aortic Valve Systems, which are based on a self-expanding architecture and
our Sentinel™ Cerebral Embolic Protection System, purchased as part of our acquisition of Claret Medical, Inc. (Claret) in the third quarter of 2018.

WATCHMAN is the first device to offer a non-pharmacologic alternative to warfarin that has been studied in a randomized clinical trial and is marketed globally. The WATCHMAN device has been commercially available internationally since 2009, received FDA approval in 2015 and is the leading device in percutaneous LAAC globally. In March of 2015, Watchman Device received FDA approval to treat patients who are at an elevated risk of stroke, deemed suitable for warfarin, and have appropriate rationale to seek a non-pharmacologic alternative to warfarin. We believe that Watchman Devicethe WATCHMAN device will be the only LAAC technology commercially available in the U.S. for multiple years, and in November 2015, we received CE Mark for our next generation device, Watchman FLX™ LAAC Device. Shortly after approval, we began a European initial market release of Watchman FLX™ Device. The initial market release was suspended near the end of the first quarter of 2016 due to a higher than expected rate of device embolization. Following an extensive data evaluation, we have decided to pursue certain design enhancements prior to returning a next generation device to market.years.

On December 12, 2016, we completedIn addition, the acquisition of certain manufacturing assets and capabilities of the Neovasc, Inc. advanced biological tissue business and madeLotus EDGE™ Valve System is a 15 percent equity investment in Neovasc. With this acquisition, we will integrate certain manufacturing assets and biologic tissue capabilities intoTAVR product based on a mechanically-expanded architecture. It is an investigational device within our structural heart businessportfolio and is not currently commercially available. We submitted the Premarket Approval (PMA) application for usethe Lotus EDGE Aortic Valve System in the manufacturingsecond half of 2018 which included the filing of the Lotus™final technical module. Our goal is to return the Lotus EDGE Valve System and future heart valve technologies within our Interventional Cardiology business.We began the process of integrating Neovasc into our Interventional Cardiology businessto market in the fourth quarter of 2016 and expect to be substantially complete by the end of 2018.2019.

Peripheral Interventions

We sell variousOur Peripheral Interventions business develops and manufactures products designed to diagnose and treat patients with peripheral arterial disease (disease which appears in blood vessels other than in the heart and in the biliary tree),diseases, including a broad line of medical devices used in percutaneous transluminal angioplasty (PTA) and peripheral vascular stenting.diseases, as well as products to diagnose, treat and ease various forms of cancer. Our broad peripheral product offerings include stents,products to treat arterial diseases (stents, balloon catheters, wires peripheraland atherectomy) and venous diseases (thrombectomy, wires and stents) and employ interventional oncology techniques to treat various cancers (peripheral embolization devices, microcatheters and vena cava filters. drainage catheters).

Our peripheral angioplasty balloon technology includes technologies include:

our next-generation Mustang™ PTA next-generation Balloon Catheter; Catheter, a 0.035" balloon with superior crossing and tracking, powerful dilatation, longer lengths and smaller sheath sizes,
our Coyote™ Balloon Catheter, a highly deliverable and ultra-low profile balloon dilatation catheter designed for a wide range of peripheral angioplasty procedures;procedures and
our Charger™ PTASterling™ Balloon Catheter, a 0.035” percutaneous transluminal angioplasty0.018" PTA balloon catheter designed for post-stent dilatation as well as conventional balloon angioplasty to open blocked peripheral arteries. With our Coyote, Mustang and Charger Devices, we offer balloons across all size platforms.

Our peripheral stent technology includes technologies include:

our EPIC™ Vascular Self-Expanding Nitinol Stent System, our Carotid WALLSTENT™ Stent System,a nitinol stent designed to sustain vessel patency while providing enhanced visibility and accuracy during placement,
our Innova™ Self-Expanding Stent System. In addition, we market System, a laser-cut nitinol stent built for the superficial femoral artery (SFA, a large artery in the thigh) with flexibility, strength and fracture resistance and
our 0.035" Rubicon™ Support Catheter in bothEluvia™ Drug Eluting Vascular Stent System, an innovative stent built on the U.S. and Europe. We are currently conducting a pivotal studyInnova stent platform, designed to evaluatedeliver a sustained dosage of paclitaxel during the safety and performance oftime when restenosis is most likely to occur.

We received FDA approval for the Eluvia™Eluvia Drug-Eluting Vascular Stent System whichin the third quarter of 2018 and previously received a CE Mark approval in February 2016 and is designed to treat patients with narrowing or blockages in the SFA or proximal popliteal artery (PPA). We are also conducting an additional study on the safety and effectiveness of our RANGER™ Drug-Coated Balloon.2016.

In August 2014, we acquired the Interventional Division of Bayer AG (Bayer). The addition of Bayer innovativeOur venous disease technologies supports include:

our strategy to provide a comprehensive portfolio of leading solutions to treat peripheral vascular disease, including venous disease. The transaction included the leading AngioJet™ Thrombectomy System, which is used in endovascular procedures to remove blood clots from blocked arteries and veins, and the JetStream™ Atherectomy System, used to remove plaque and thrombi from diseased arteries. We have since launched the AngioJet™ZelanteDVT™
our AngioJetZelante DVT™ Thrombectomy Catheter to treat deep vein thrombosis (DVT) in large-diameter upper and lower limb peripheral veins, in the U.S. and Europe and
our VICI VENOUS STENT™ System to treat deep vein thrombosis (DVT) in large-diameter upper and lower limb peripheral veins,venous obstructive disease, which was purchased as part of the VENITI, Inc. acquisition in the U.S. and Europe.third quarter of 2018.

We also selloffer products designed to treat patients with non-vascular disease, (disease that appears outside the blood system), primarily in interventional oncology. Our non-vascular suite of products includes biliary stents, drainage catheters and micro-puncture sets designed to treat, diagnose and ease various forms of benign and malignant tumors. We market product offerings in this area include:

our Direxion™ Torqueable Microcatheter in both the U.S. and Europe. In addition, we continue to market
our extensive line of interventional oncology product solutions, including the Renegade™ HI-FLO™ Fathom™ Microcatheter and guidewire systemGuidewire System and Interlock™ - 35 Fibered IDC™ and 18 Fibered IDC™ Occlusion System for peripheral embolization.

On December 31, 2015, we completed the acquisition of the interventional radiology business of CeloNova Biosciences (CeloNova). The acquisition includes drug-eluting microspheres designed to be loaded with chemotherapy drugs for delivery to cancerous tumors, and spherical embolic products used to treat uterine fibroids and other conditions. We are in the process of integrating CeloNova into our Peripheral Interventions business and expect to be substantially complete by the second half of 2017.


Rhythm Management

Cardiac Rhythm Management

We develop, manufacture and market a variety of implantable devices that monitor the heart and deliver electricity to treat cardiac abnormalities, including:
Implantable cardioverter defibrillator (ICD) systems used to detect and treat abnormally fast heart rhythms (tachycardia) that could result in sudden cardiac death, including the world's only commercially available subcutaneous implantable cardiac defibrillators (S-ICD), along with implantable transvenous cardiac defibrillators and implantable cardiac resynchronization therapy defibrillator (CRT-D) systems used to treat heart failure; and

Implantable pacemaker systems used to manage slow or irregular heart rhythms (bradycardia), including implantable cardiac resynchronization therapy pacemaker (CRT-P) systems used to treat heart failure.
In addition, in most geographies, our implantable device systems include our remote LATITUDE™ Patient Management System, which enables physicians to monitor device performance remotely, allowing for more frequent monitoring in order to guide treatment decisions.

We market several lines of ICD’s, including our DYNAGEN™ EL , DYNAGEN™ MINI, INOGEN™ EL and INOGEN™ MINI. MINI is the smallest, thinnest ICD and EL (extended longevity) is the longest lasting ICD due to our proprietary EnduraLife™ battery technology. In addition, we offer our EMBLEM™ MRI S-ICD System, which affords physicians the ability to treat patients who are at risk for sudden cardiac arrest without touching the heart or invading the vasculature. Our EMBLEM MRI S-ICD System offers greater longevity, LATITUDE™ Patient Management Remote Monitoring Technology and smaller size as compared to the first generation of S-ICD therapy. We also offer several lines of CRT-D systems, including our X4 line of quadripolar systems, a suite of ACUITY™ X4 Quadripolar LV Leads, and the ACUITY™ PRO Lead Delivery System. We initiated the full U.S. launch of our ACUITY™ X4 Quadripolar LV Leads in March 2016 and began global commercialization of the EMBLEM MRI S-ICD system in the second and third quarters of 2016. Our current generation of transvenous ICD and CRT-D pulse generators, DYNAGEN and INOGEN, when paired with our most current generation of bradycardia, heart failure, and ICD leads have MRI safe labeling in most major countries outside the U.S. In the U.S., we plan to finish enrollment in our High Voltage MRI approval trial, ENABLE MRI, in early 2017.
We market our ACCOLADE™ family of pacemaker systems in nearly all major markets around the world. Approval of our ACCOLADE Pacemaker family in the U.S., Europe and Japan also includes approval for use of these products in patients undergoing magnetic resonance imaging (MRI) scans. We received FDA approval of our ACCOLADE MRI-Compatible Pacemaker and MRI-compatible Ingevity™ Bradycardia Lead in April of 2016. Our cardiac resynchronization therapy pacemaker product offerings include our newest generation VISIONIST™ and VALITUDE™X4 Quadripolar CRT-P Devices, which are built on the same platform as our high voltage cardiac resynchronization therapy defibrillator, are enabled for remote patient monitoring, and include features that promote ease of use for physician implantation.

Electrophysiology

Within our Electrophysiology business, we develop less-invasive medical technologies used in the diagnosis and treatment of rate and rhythm disorders of the heart. Included in our product offerings are steerable radio frequency (RF) ablation catheters, intracardiac ultrasound catheters, diagnostic catheters, delivery sheaths, and other accessories. Our products include the Blazer® line of temperature ablation catheters, designed to deliver enhanced performance and responsiveness. Our cooled ablation portfolio includes our U.S. and CE Mark approved Blazer™ Open-Irrigated and IntellaNav™ Open-Irrigated Ablation Catheters with a unique Total Tip Cooling™ Design and our closed-loop irrigated catheter, the Chilli II™ Cooled Ablation Catheter. In addition to these open-irrigated catheters, we began global commercialization of our IntellaNav™ XP and IntellaNav™ MiFi XP Catheters in the second quarter of 2016. Our IntellaTip MiFi™ XP and IntellaNav MiFi XP Catheters include MicroFidelity (MiFi) sensor technology in the catheter tip. All of our IntellaNav™ Catheters are designed to allow magnetic tracking when used with our Rhythmia™ Mapping System.

Our comprehensive diagnostic catheter portfolio includes Blazer™ Dx-20, Dynamic Tip™ and Viking™ Catheters. We have a full offering of capital equipment, including our LabSystem PRO™ Recording System, the Rhythmia Mapping System, Maestro™ RF Generators, and the MetriQ™ pump. In 2015, the Rhythmia Mapping System and IntellaMap Orion™Mapping Catheter began full global commercialization, bringing to market a next generation system capable of high-density high-resolution mapping to improve procedure efficacy. In December of 2016, we began European commercialization of our next generation Rhythmia™ HDX Mapping System.

MedSurg

Endoscopy

Gastroenterology and Pulmonary

We are dedicated to transforming the lives of patients by advancing the diagnosis and treatment of a broad range of pulmonary and gastrointestinal conditions. We do this through the development of innovative devices for less invasive procedures, tailored services to optimize hospital operations and patient care, and programs in support of education and reimbursement. Common gastrointestinal (GI) disease states include esophageal disorders, GI strictures and bleeding, pancreatico-biliary disease and other associated conditions, as well as esophageal, biliary, pancreatic and colon cancer. Some of our product offerings include:

The SpyGlass™ DS System, made available in 2015, brings digital imaging, a wider field of view and a simpler set-up (compared to the legacy SpyGlass System), enabling cholangioscopy to play a greater role in the diagnosis and treatment of pancreatico-biliary diseases.

The AXIOS™ Stent and Electrocautery-Enhanced Delivery System for endoscopic ultrasound-guided transmural drainage of pancreatic pseudo cysts, which provides a less invasive alternative to surgical pseudo cyst draining procedures and procedural time savings when compared to a non-electrocautery enhanced system. On April 2, 2015, we acquired Xlumena, Inc. (Xlumena), a medical device company that developed minimally invasive devices for Endoscopic Ultrasound (EUS) guided transluminal drainage of targeted areas within the gastrointestinal tract. We continue to grow our presence in the field of endoluminal surgery in the U.S. and expand internationally.

The WallFlex™ Biliary RX Fully Covered Stents System RMV is the first and currently only biliary metal stent to receive U.S. FDA clearance for an indication to treat benign biliary strictures due to chronic pancreatitis. This stent can be safely placed and removed for up to 12 months, providing additional treatment options for physicians managing their patients with this condition.

The Resolution 360™ Clip, launched in October 2016, and built on the market-leading technology of our legacy Resolution™ Clip, is a novel hemostatic clipping technology designed to stop and help prevent bleeding during endoscopic procedures. The device is constructed using a multi-wire braided catheter designed to enable healthcare professionals to rotate the device in small, controlled movements in both clockwise and counterclockwise directions. This design enables the clip to be maneuvered to the target area and more accurately placed at the site of a GI bleed or potential GI bleed.

The Acquire™ Endoscopic Ultrasound Fine Needle Biopsy (FNB) Device, initially launched in May 2016 and was in full launch as of January 2017, is designed to obtain larger tissue specimens. FNB devices are used during EUS procedures to collect tissue specimens for histological assessment and are useful when diagnosing diseases such as pancreatic cancer, liver cancer and stomach lesions. This new device is designed to obtain more tissue, providing physicians with confidence that the samples they extract may improve diagnostic yield to help determine the best course of treatment for a patient.

On November 22, 2016, we completed our acquisition of EndoChoice Holdings, Inc. (EndoChoice). EndoChoice is an Alpharetta, Georgia based company focused on the development and commercialization of infection control products, pathology services and single-use devices for specialists treating a wide range of gastrointestinal (GI) conditions. We began the process of integrating EndoChoice into our Endoscopy business in the fourth quarter of 2016 and expect to be substantially complete by the end of 2017.

On November 1, 2016, we acquired the LumenR™ Tissue Retractor System from LumenR LLC (LumenR), a privately held Newark, California based company. The LumenR™ Tissue Retractor System is currently in development for use during endoscopic resection of lesions in the colon, esophagus or stomach.

Interventional Bronchoscopy

We market devices to diagnose, treat and ease pulmonary disease systems within the airway and lungs. Our products are designed to help perform biopsies, retrieve foreign bodies from the airway, open narrowings of an airway, stop internal bleeding, and ease symptoms of some types of airway cancers. Our product line includes pulmonary biopsy forceps; transbronchial aspiration needles; cytology brushes; tracheobronchial stents used to dilate narrowed airway passages or for tumor management; and the Alair™ Bronchial Thermoplasty System for the treatment of severe persistent asthma.

Urology and Pelvic Health

Our Urology and Pelvic Health business develops, manufactures and sells devices to treat various urological and pelvic conditions. Within our Urology business, we sell a variety of products designed to treat patients with urinary stone disease and benign prostatic hyperplasia (BPH). We offer a full line of stone management products, including ureteral stents, wires, lithotripsy devices, stone retrieval devices, sheaths, balloons and catheters. Within our Pelvic Health business, we market a range of devices for the treatment of conditions such as stress urinary incontinence, pelvic floor reconstruction (rebuilding of the anatomy to its original state), menorrhagia (excessive menstrual bleeding), and uterine fibroids and polyps. We offer a full breadth of mid-urethral sling products, sling materials, graft materials, pelvic floor reconstruction kits, and suturing devices. We market our Genesys Hydro ThermAblator™ (HTA) System, an ablation system designed to ablate the endometrial lining of the uterus in premenopausal women with menorrhagia, Symphion™ System for the removal of intrauterine fibroids and polyps.

On August 3, 2015, we completed the acquisition of the American Medical Systems male urology portfolio (AMS Portfolio Acquisition), which includes the men's health and prostate health businesses, from Endo International plc. The AMS male urology portfolio was integrated with our formerly named Urology and Women's Health business, and the joint businesses became Urology and Pelvic Health. The integration was substantially complete by the end of 2016.Proposed BTG Acquisition

On November 15, 2016, we completed20, 2018, our board of directors and the acquisitionboard of directors of our wholly owned indirect subsidiary, Bravo Bidco Limited (Bidco), and BTG plc (BTG), a public company organized under the laws of England and Wales, issued an announcement (the Rule 2.7 Announcement) under Rule 2.7 of the gynecologyUnited Kingdom City Code on Takeovers and urology portfolioMergers, disclosing the terms of Distal Access, LLC (Distal), a Salt Lake City based company that designs minimally invasive medical devices. The portfolio includes the Resectr™ Tissue Resection Device, a single-use solution designed to remove uterine polyps. We began the process of integrating the Resectr device into our Urology and Pelvic Health business during the fourth quarter of 2016 and expectrecommended cash offer to be substantially completemade by Bidco for the endentire issued and to be issued ordinary share capital of 2017.BTG (the proposed BTG Acquisition). On January 24, 2019, Bidco made such offer on the terms and subject to the conditions of the scheme document published on the same date. In connection with the proposed BTG Acquisition, (i) we entered into a co-operation agreement with Bidco and BTG, (ii) certain shareholders and each BTG director owning shares of BTG delivered deeds of irrevocable undertakings to Bidco and (iii) we entered into a bridge credit agreement (the Bridge Facility). Refer to Note E – Borrowings and Credit Arrangements to our consolidated financial statements contained in Item 8. Financial Statements and Supplementary Data of this Annual Report for further details of the Bridge Facility. On February 14, 2019, each of the Company and BTG received a request for additional information and documentary material from the United States Federal Trade Commission in connection with the proposed BTG Acquisition.

NeuromodulationUnder the terms of the proposed BTG Acquisition, BTG shareholders will receive 840 pence in cash for each BTG share, which values BTG’s existing issued and to be issued ordinary share capital at approximately £3.311 billion (or approximately $4.225 billion based on the exchange rate of U.S. $1.28: £1.00 on December 31, 2018). We intend to implement the proposed BTG Acquisition by way of a court-sanctioned scheme of arrangement (Scheme) under Part 26 of the United Kingdom Companies Act 2006, as amended (the Companies Act).

Our Neuromodulation business offers the PrecisionTMBTG develops and Precision SpectraTM Spinal Cord Stimulator (SCS) Systems,commercializes products used for the management of chronic pain. The Precision SpectraTM System is the world's firstin minimally-invasive procedures targeting cancer and only SCS system with 32 contacts and 32 dedicated power sources and is designed to provide improved pain relief to a wide range of patients who suffer from chronic pain. We believe that we continue to have a technological advantage compared to our competitors with proprietary features suchvascular diseases, as Multiple Independent Current Control and our Illumina 3D Proprietary Programming Software, which together are intended to allow the physician to target specific areas of pain and customize stimulation of nerve fibers more precisely. Additionally, in June 2015, we launched the Precision Novi™ SCS System in Europe. The Precision Novi™ System offers patients and physicians the smallest 16-contact high capacity primary cell (PC), also referred towell as non-rechargeable, device for the treatment of chronic pain.acute care pharmaceuticals.

WeThe proposed BTG Acquisition will be subject to conditions and certain further terms, including (i) the approval of the Scheme by a majority in number of BTG shareholders also have regulatory approval for our Vercise™ Deep Brain Stimulation (DBS) Systemrepresenting not less than 75 percent in various international regions such as Europe, Latin Americavalue of the BTG shares, in each case, present, entitled to vote and Asia Pacific forvoting, (ii) the treatmentsanction of Parkinson's disease, tremor and intractable primary and secondary dystonia, a neurological movement disorder characterized by involuntary muscle contractions. In September 2015, we gained CE-mark approvals for the Vercise™ PC DBS System with its Neural Navigator™ Programming Software. The system allows for programming flexibility, designed to treat a greater range of patients throughout their disease progression. In addition, we received CE Mark approval for the only commercially available Directional Lead powered by current steering. The Cartesia™ Directional Lead uses multi-directional stimulation for greater precision, intended to minimize side effects for patients. We are currently in a U.S. pivotal trial with our Vercise DBS System for the treatment of Parkinson’s disease and expect to enter the U.S. market with our Vercise DBS SystemScheme by the endHigh Court of 2017.Justice in England and Wales, (iii) the Scheme becoming effective no later than August 20, 2019 and (iv) the receipt of regulatory approvals. The conditions to the proposed BTG Acquisition are set out in full in the Rule 2.7 Announcement. Subject to the satisfaction or waiver of all relevant

On July 27, 2016,conditions, we acquired Cosman Medical, Inc. (Cosman), a privately held manufacturer of radiofrequency ablation systems, expanding our Neuromodulation portfolio and offering physicians treating patients with chronic pain a wider choice of non-opioid therapeutic options. We areexpect the proposed BTG Acquisition to be effective in the processfirst half of integrating Cosman into2019. Refer to Note B – Acquisitions and Strategic Investments to our Neuromodulation business,consolidated financial statements contained in Item 8. Financial Statements and expectSupplementary Data of this Annual Report for additional details related to the integration to be substantially complete by the end of 2017.proposed BTG Acquisition.

Research and Development

Our investment in research and development is critical to driving our future growth. We expended $920 million on research and development in 2016, $876 million in 2015, and $817 million in 2014. Our investment in research and development reflectssupports the following:

internal research and development programs, regulatory design and clinical science, as well as other programs obtained through our strategic acquisitions and alliances;alliances and


engineering efforts that incorporate customer feedback into continuous improvement efforts for currently marketed and next-generation products.

We have directed our development efforts toward innovative technologies designed to expand current markets or enter adjacent markets. We are transforming how we conduct research and development and are scrutinizing our cost structure, which we believe will enable increased development activity and faster concept to marketconcept-to-market timelines. Our

Focused, cross-functional teams take a formal approach to new product design and development, is through focused, cross-functional teams. We believe that our formal process for technologyhelping us to manufacture and product development aids in our ability to offer and manufacture innovative products in a consistentconsistently and timely manner. Involvement of theefficiently. Involving cross-functional teams early in the process is the cornerstone of our product development cycle. We believe this collaboration allows theseour teams to concentrate resources on the most viable and clinically relevant new products and technologies and focus on bringingmaximize cost and time savings as we bring them to market in a timely and cost-effective manner. market.

In addition to internal development, we work with hundreds of leading research institutions, universities and clinicians around the world to develop, evaluate and clinically test our products. We are expanding our collaborations to include research and development teams in emerging markets; these teams will focus on both global and local market requirements at a lower cost of development. We believe that these efforts will play a part ofsignificant role in our future success will depend upon the strength of these development efforts.success.

Marketing and Sales

During 2016,In 2018, we marketed our products and solutions to approximately 35,000 hospitals, clinics, outpatient facilities and medical offices in the U.S. and toin approximately 120130 countries worldwide. The majority of our net sales are derived from countries in which we have direct sales organizations. We also have a network of distributors and dealers who offer our products in certain countries and markets. We expect to continue to leverage our infrastructure in markets where commercially appropriate and use third party distributors in those markets where it is not economical or strategic to establish or maintain a direct presence.

No single institution accounted for more than ten percent of our net sales in 2016, 20152018, 2017 or 2014;2016; however, large group purchasing organizations, hospital networks and other buying groups have become increasingly important to our business and represent a substantial portion of our net sales. We have a dedicated corporate salesaccounts organization in the U.S. and Europe focused principally on selling to major buying groups and integrated healthcare networks. We consistently strive to understand and exceed the expectations of our customers. Each of our businesses maintains dedicated sales forces and marketing teams focused on physicians who specialize in the diagnosis and treatment of different medical conditions.conditions, as well as on key hospital service line administrators. We believe that this dual focus on disease state management and hospital administrators enables us to develop highly knowledgeable and dedicated sales representatives and to foster collaborative relationships with physicians.both physicians and key service line administrators. We believe that we haveour positive working relationships with physicians, service line administrators and others in the medical industry which enable us to gain a detailed understanding of new therapeutic and diagnostic alternatives and to respond quickly to theour customers' changing needs of physicians and their patients.needs.

International Operations

International net sales accounted for approximately44 percent of our net sales in 2018 and 43 percent of our net sales in both 2017 and 2016. Maintaining and expanding our international presence is an important component of our long-term growth strategy. Through our international presence, we seek to increase net sales and market share, leverage our relationships with leading physicians and their clinical research programs, accelerate the time to bring new products to market and gain access to worldwide technological developments that we can implement across our product lines. In addition, we are investing in infrastructure in emerging markets in order to strengthen our sales and service capabilities and maximize our opportunities in these countries.

As of December 31, 2016,2018, we had sixnine principal international manufacturing facilities, including three in Ireland, two in Costa Rica, one in Brazil, one in Malaysia, one in Puerto Rico and one in Puerto Rico.Switzerland. Approximately 45 percent of our products

manufactured in 20162018 were produced at these facilities. Additionally, weWe also maintain research and development capabilities in Ireland, Puerto Rico,China, Costa Rica, Germany, India, Ireland and China.Puerto Rico. We operate physician training centers in China, France, Germany, India, Italy, Japan, Poland, South Africa Germany, Italy and India.South Korea.

Manufacturing and Raw Materials

We are focused on continuously improving our supply chain effectiveness, strengthening our manufacturing processes and increasing operational efficiencies within our organization. We continually strive to improve the efficiency of our Sourcing Operations,sourcing operations and to partner with strategic suppliers to leverage the technical expertise of the broader market.  Bymarket by partnering with strategic suppliers. In doing so, we seek to focus our internal resources on the development and commercial launch of new products and the enhancement of existing products. We continue to implement new systems designed to provide improved quality, reliability, service, greater efficiency and lower supply chain costs, and continue our focus oncosts. We also drive continuous improvement in product quality through process controls and validations, supplier controls,and distribution controls and providing our operations teams with the necessary training and tools necessary to drive continuous improvement in product quality.tools. In addition, we remain focused on examining our operations and general business activities to identify cost-improvement opportunities in order to enhance our operational effectiveness.effectiveness by identifying cost-improvement opportunities.

We remain committed to maintaining prudent investments in supply chain resiliency on an ongoing basis. Our products are designed and manufactured in technology centers around the world, either by us or third parties. We consistently monitor our inventory levels, manufacturing and distribution capabilities and maintain recovery plans to address potential disruptions that we may encounter.

Many components used in the manufacturing of our products are readily fabricated from commonly available raw materials or off-the-shelf items available from multiple supply sources; however, certain items are custom made to meet our specifications. We believe that in most cases, redundant capacity exists at our suppliers and that alternative sources of supply are available or could be developed within a reasonable period of time. We also have an on-goingongoing program to identify single-source components and to develop alternative back-up supplies and we regularly readdress the adequacy and abilities of our suppliers to meet our needs.

Quality Assurance

We are committed to providing high quality products to our customers. Our quality system starts with the initial product specification and continues through the design of the product, component specification process and the manufacturing, sale and servicing of the product. Our quality system is intended to build in quality and process control and to utilize continuous improvement concepts throughout the product life. These systems are designed to enable us to satisfy the various international quality system regulations, including those of the FDA with respect to products sold in the U.S. All of our manufacturing facilities and distribution centers are certified under the ISO13485ISO 13485 quality system standard, established by the International Standards Organization (ISO) for medical devices, which requires, among other items,includes requirements for an implemented quality system that applies to component quality, supplier control, product design and manufacturing operations. This certification can be obtained only after a complete audit of a company’s quality system by an independent outside auditor. Maintenance of the certification requires that these facilities undergo periodic re-examination.

Environmental Regulation and Management

We are subject to various environmental laws, directives and regulations both in the U.S. and abroad. Our operations involve the use of substances regulated under environmental laws, primarily in manufacturing and sterilization processes. We believe that sound environmental, health and safety performance contributes to our competitive strength while benefiting our customers, stockholders and employees. We are focused on continuous improvement in these areas by reducing pollution, the depletion of natural resources and our overall environmental footprint. Specifically, we are working to optimize energy and resource usage, ultimately reducing greenhouse gas emissions and waste. We are certified tolisted on the FTSE4Good Corporate Social Responsibility Index, managed by Thethe Financial Times and the London Stock Exchange, which measures the performance of companies that meet globally recognized standards of corporate responsibility. This certificationlisting recognizes our dedication to those standards and it places us in a select group of companies with a demonstrated commitment to responsible business practices and sound environmental policies.

We have obtained ISO 14001:20042015 certifications at our major manufacturing plants and Tier 1 distribution centers around the world, as well as our Corporate Headquartersheadquarters in Marlborough, Massachusetts. ISO 14001:20042015 is a globally recognized standard for Environmental Management Systems, established by the International Standards Organization, which provides a voluntary framework to identify key environmental aspects associated with our business. Using this environmental management system and the specific attributes of our certified locations in the U.S., Ireland, Costa Rica and the Netherlands, we continue to improve our environmental performance and reduce our environmental footprint.

Competition

We encounter significant competition across our product lines and in each market in which we sell our products and solutions, some from various companies some of whichthat may have greater financial and marketing resources than we do. Our primary competitors include Abbott Laboratories;Laboratories, Medtronic plc;plc and Cook Medical;Medical, as well as a wide range of medical device companies that sell a single or limited number of competitive products or participate in only a specific market segment. We also face competition from non-medical device companies, such as pharmaceutical companies, which may offer alternative therapies for disease states whichthat could also be treated using our products.

We believe that our products and solutions compete primarily on their ability to deliver both clinical and economic outcomes for our customers;customers while also continuing to perform diagnostic and therapeutic procedures safely and effectively in a less-invasive manner, as well as to providemanner. We also compete on ease of use, comparative effectiveness, reliability and physician familiarity. In the current environment of managed care, with economically-motivated buyers, consolidation among healthcare providers, increased competition and declining reimbursement rates, we have been increasingly required to compete on the basis of price, value, reliability and efficiency.

We believe the current global economic conditions and healthcare reform measures could continue to put additional competitive pressure on us, including on our average selling prices, overall procedure rates and addressable market sizes. We recognize that our continued competitive success will depend upon our ability to:

offer products and solutions that provide differentiated clinical and economic outcomes; outcomes,
create or acquire innovative, scientifically advanced technologies; technologies,
apply our technology and solutions cost-effectively and with superior quality across product lines and markets; markets,
develop or acquire proprietary products and solutions; solutions,
attract and retain skilled personnel; personnel,
obtain patent or other protection for our products; products,
obtain required regulatory and reimbursement approvals; approvals,
continually enhance our quality systems; systems,
manufacture and successfully market our products and solutions either directly or through outside parties;parties and
supply sufficient inventory to meet customer demand.

Medical Device Regulatory Approvals

The medical devices that we manufacture and market are subject to regulation by numerous worldwide regulatory bodies, including the FDA and comparable international regulatory agencies. These agencies require manufacturers of medical devices to comply with applicable laws and regulations governing development, testing, manufacturing, labeling, marketing and distribution of medical devices. Devicesdistribution. Medical devices are also generally subject to varying levels of regulatory control based on the risk level of the device.

In the U.S., authorization to distribute a new device can generally be met in one of three ways. The first process requires that a premarket notification (510(k)) be made to the FDA to demonstrate that the device is as safe and effective as, or substantially equivalent to, a legally marketed device the(the “predicate” device.device). Applicants must submit performance data to establish substantial equivalence. In some instances, data from human clinical trials must also be submitted in support of a 510(k) premarket notification. If so, these data must be collected in a manner that conforms to the applicable Investigational Device Exemption (IDE) regulations. The FDA must issue a decision finding substantial equivalence before commercial distribution can occur. Changes to cleared devices that could not significantly affect the safety or effectiveness of the device can generally be made without additional 510(k) premarket notifications; otherwise, a new 510(k) is required.

The second process requires the submission of a premarket approval (PMA) application to the FDA to demonstrate that the device is safe and effective for its intended use. This approval process applies to most Class III devices and generally requires clinical data to support the safety and effectiveness of the device, obtained in adherence with IDE requirements. The FDA will approve the PMA application if it finds that there is a reasonable assurance that the device is safe and effective for its intended purpose and that the proposed manufacturing is in compliance with the Quality System Regulation (QSR). For novel technologies, the FDA will generally seek input from an advisory panel of medical experts and seek their views on the safety, effectiveness and benefit-risk of the device. The PMA process is generally more detailed, lengthier and more expensive than the 510(k) process.

The third process requires that an application for a Humanitarian Device Exemption (HDE) be made to the FDA for the use of a Humanitarian Use Device (HUD). An HUD is intended to benefit patients by treating or diagnosing a disease or condition that affects, or is manifested in, fewernot more than 4,0008,000 individuals in the U.S. per year. The application submitted to the FDA for an HDE is similar in both form and content to a PMA application, but is exempt from the effectiveness requirements of a PMA. The HUD

provision of the regulation provides an incentive for the development of devices for use in the treatment or diagnosis of diseases affecting smaller patient populations.

In the European Economic Area (EEA), we are required to comply with applicable Medical Device Directives, specifically the Medical Devices Directive and the Active Implantable Medical Device Directive, and obtainDirective. These directives require us to affix a CE Mark Certification in orderon medical devices prior to placing them on the market medical devices within the EEA. The CE Mark is applied depending on device classification,affixed following conformity assessment and either following approval from the appointed independent Notified Body or through self-certification.self-certification by the manufacturer. The selected pathway to CE marking is based on product risk. CE Marking is a symbol of complianceindicates conformity to the applicable Essential Requirements of the relevant Medical Devices Directive and associated Standards.Directive. The EU regulatory bodies will finalizeEuropean Union (EU) Commission published a new Medical Device Regulation (MDR) in 2017, providing a three-year transition period until May 2020, at which will replacetime, the existing Directives and will provide three years for transition and compliance.be repealed. The MDRMedical Device Regulation will change severalmultiple aspects of the existing regulatory framework, such as higher clinical dataevidence requirements and introduce several new ones,requirements, such as Unique Device Identification (UDI).  We, and the Notified Bodies who will oversee compliance tomany other post-market obligations. Thus, the new MDR, face uncertainties asMedical Device Regulation significantly modifies and intensifies the MDR is rolled out and enforced bycompliance requirements for the Commission and EEA Competent Authorities, creating risks in several areas including the CE Marking process and data transparency in the upcoming years.industry.

We are also required to comply with the regulations of eachevery other country where we commercialize products before we can launch or maintain new products on the market, such as the requirement that we obtain approval from the Japanese Ministry of Health, Labor and Welfare (MHLW), the Japanese Pharmaceutical & Medical Device Agency (PMDA) and the China Food and Drug Administration.Administration (NMPA). Many countries that previously did not have medical device regulations, or minimal such regulations, are now introducing them. For example, India is in the process of establishing newexpanding its current regulations to include all medical device categories while many countries in the Middle East and Southeast Asia are introducing new regulations.

The FDA and other worldwide regulatory agencies and competent authorities actively monitor compliance to local laws and regulations through review and inspection of design and manufacturing practices, record keeping, reporting of adverse events,

labeling and promotional practices. The FDA can ban certain medical devices;devices, detain or seize adulterated or misbranded medical devices;devices, order repair, replacement or refund of these devices;devices and require notification of health professionals and others with regard to medical devices that present unreasonable risks of substantial harm to the public health. The FDA may also enjoin and restrain a company for certain violations of the Food, Drug and Cosmetic Act and the Safe Medical Devices Act pertaining to medical devices or initiate action for criminal prosecution of such violations. Regulatory agencies and authorities in the countries where we do business can halt production in or distribution within their respective country or otherwise take action in accordance with local laws and regulations.

International sales of medical devices manufactured in the U.S. that are not approved by the FDA for use in the U.S., or that are banned or deviate from lawful performance standards, are subject to FDA export requirements. Exported devices are subject to the regulatory requirements of each country to which the device is exported. Some countries do not have medical device regulations, but in most foreign countries, medical devices are regulated. Frequently, regulatory approval may first be obtained in a foreign country prior to application in the U.S. due to differing regulatory requirements; however, other countries, such as China for example, require approval in the country of origin first. Most countries outside of the U.S. require that product approvals be recertified on a regular basis, generally every five years. The recertification process requires that we evaluate any device changes and any new regulations or standards relevant to the device and, where needed, conduct appropriate testing to document continued compliance. Where recertification applications are required, they must be approved in order to continue selling our products in those countries.

Government Affairs

We maintain a global Government Affairs presence, headquartered in Washington, D.C., to actively monitor and advocate on a myriad legislation and policies impacting us, both on a domestic and an international front. The Government Affairs office works closely with members of Congress and committee staff, the White House and Administration offices, state Governors, legislatures and regulatory agencies, embassies and global governments overseas on issues affecting our business. Our proactive approach and depth of political and policy expertise are aimed at having our positions heard by federal, state and global decision-makers while also advancingto improve patient care and to advance our business objectives by educating policymakers on our positions, key priorities and the value of our technologies. The Government Affairs office also manages our political action committee and works closely with trade groups on issues affecting our industry and healthcare in general.
Healthcare Policies and Reimbursement
Political, economic and regulatory influences around the world continue to subject the healthcare industry to potential fundamental changes that could substantially affect our results of operations. Government and private sector initiatives related to limiting the growth of healthcare costs (including price regulation), coverage and payment policies, comparative effectiveness reviews of therapies, technology assessments and health care delivery structure reforms, are continuing in many countries where we do

business. We believe that these changes are causing the marketplace to put increased emphasis on the delivery of treatments that can reduce costs, improve efficiencies and/or increase patient access. Although we believe our less-invasive products and technologies generate favorable clinical outcomes, value and cost efficiency, the resources necessary to demonstrate value to our customers, patients, payers and other stakeholders may beare significant and new therapies maynow take a longer periodperiods of time to gain widespread adoption.

The impact to our business of the United States’U.S. Patient Protection and Affordable Care Act's (ACA) provisions related to coverage expansion, payment reforms and delivery system has been immaterial. The ACA and Health Care and Education Affordability Reconciliation Act were enacted into law in the U.S. in 2010. The legislation imposed on medical device manufacturers a 2.3 percent excise tax on U.S. sales of Class I, II and III medical devices beginning in January 2013. In December 2015, the Promise for Antibiotics and Therapeutics for Health Act, or PATH Act, was passed, which included legislation which temporarily suspended the 2.3 percent excise tax until December 31, 2017. In January 2018, another temporary two-year suspension of the 2.3 percent excise tax was passed, extending the suspension to December 31, 2019. We have substantially reinvested thesubstantial amounts of funds that we would have expended on this tax into jobs, innovation, research and development, collaborations with universities and other initiatives that will help treat patients and drive revenue growth.

The U.S. Federal government, as part of the ACA, and certain state governments have enacted laws aimed at increasing transparency, or "sunshine," in relationships between medical device, biologics and pharmaceutical companies and healthcare professionals (HCPs). As a result, we are required by law to report many types of payments and itemstransfers of value provided to HCPs. Certain foreign jurisdictions are currently acting to implement similar laws. Failure to comply with sunshine laws and/or implement and adhere to adequate policies and practices to address changes to legal and regulatory requirements could have a negative impact on our results of operations.


The Additional legislation at the state and federal election results in the U.S.levels may result in further changes to insurance coverage, financing of insurance coverage in both the employer-sponsored insurance and individual markets, government programs such as Medicare and Medicaid, and federal sunshinethese laws. At this point, the impact of any such changes through repeal of, or major changes to, the ACA is unclear because specific changes in laws have not been enacted. Similarly, the status of the medical device tax after December 31, 2017 is not clear. While the specific policies that the new Administration and Congress may enact are not known, as

As noted below, we expect certain trends to continue placing pressure on pricing and utilization in the U.S. The Tax Cuts and Jobs Acts (TCJA), enacted December 22, 2017 in the U.S., makes changes to the tax treatment of health care expenses and repealed the “individual mandate” to purchase private insurance. These tax law changes have resulted in changes to insurance coverage and financing of insurance coverage in individual markets. Additional legislation may result in changes to government programs such as Medicare and Medicaid. In addition, the current U.S. Administration has enacted a number of administrative policy changes that will likely result in additional changes to insurance coverage, financing of insurance coverage and benefits offered through private insurance in both the employer-sponsored and individual markets. These changes and other similar changes being considered are likely to lead to an increase in the number of people without insurance. Other individual coverage policies will be less generous than those required under the ACA. The impact of these changes on coverage levels and patient cost-sharing could affect utilization of non-urgent, non-acute services in which our devices are used.

Additionally, while the implementation of the medical device tax has further been suspended until December 31, 2019, the status of the tax for sales after December 31, 2019 is not clear. The medical device tax may continue to be suspended, or it may be reinstated at the same or at a different level effective January 1, 2020.

We expect that pricing of medical devices will remain under pressure as alternative payment reform, such as prospective payment systems for hospital care, preferential site of service payments, value-based purchasing and accountable care organizations (ACOs), continue to take shape globally. We also expect marketplace changes to place pressure on medical device pricing globally as hospitals consolidate and large group purchasing organizations, hospital networks and other groups continue to seek to aggregate purchasing power. Similarly, governments are increasing the use of tenders, placing pressure on medical device pricing. Some governments also seek to limit the growth of healthcare costs through price regulation. Implementation of cost containment initiatives and healthcare reforms in significant markets such as the U.S., Japan and Europe and other markets may limit the price of, or the level at which reimbursement is provided for, our products, which in turn may influence a hospital’s or physician's selection of products used to treat patients.

Third-Party Coverage and Reimbursement

Our products are purchased principally by hospitals, physicians and other healthcare providers around the world that typically bill various third-party payers, including government programs (e.g., Medicare and Medicaid in the U.S.) and private insurance payers, for the services provided to their patients.

Third-party payers and governments may approve or deny coverage for certain technologies and associated procedures based on independently determined assessment criteria. Coverage decisions by payers for these technologies and associated procedures are based on a wide range of methodologies that may reflect the assessed resource costs, clinical outcomes and economic value of the technologies and associated procedures.


Proprietary Rights and Patent Litigation

We rely on a combination of patents, trademarks, trade secrets and non-disclosure agreementsother forms of intellectual property to protect our intellectual property.proprietary rights. We generally file patent applications in the U.S. and foreign countries where patent protection for our technology is appropriate and available. As of December 31, 2016,2018, we held more than 19,000 patents and had approximately 6,0005,000 patent applications pending worldwide that cover various aspects of our technology. In addition, we hold exclusive and non-exclusive licenses to a variety of third-party technologies covered by patents and patent applications. In the aggregate, these intellectual property assets and licenses are of material importance to our business; however, we believe that no single patent, technology, trademark, intellectual property asset or license except for those relating to our drug-eluting coronary stent systems, is material in relation to our business as a whole.

We rely on non-disclosure and non-competition agreements with employees, consultants and other parties to protect, in part, trade secrets and other proprietary technology. There has been substantial litigation regarding patent and other intellectual property rights in the medical device industry, particularly in the areas in which we compete. We continue to defend ourselves against claims and legal actions alleging infringement of the patent rights of others. Additionally, we may find it necessary to initiate litigation to enforce our patent rights, to protect our trade secrets or know-how and to determine the scope and validity of the proprietary rights of others. Accordingly, we may seek to settle some or all of our pending litigation, particularly to manage risk over time. Settlement may include cross licensing of the patents that are the subject of the litigation as well as our other intellectual property and may involve monetary payments to or from third parties.

We maintain insurance policies providing limited coverage against securities claims, and weclaims. We are substantially self-insured with respect to product liability claims and fully self-insured with respect to intellectual property infringement claims. The absence of significant third-party insurance coverage increases our potential exposure to unanticipated claims or adverse decisions. See Item 3 and Note KJ – Commitments and Contingencies to our 20162018 consolidated financial statements included in Item 8 of this Annual Report for a discussion of intellectual property, product liability and other litigation and proceedings in which we are involved.

Employees

As of December 31, 2016,2018, we had approximately 27,00032,000 employees, including approximately 13,00015,000 in operations; 9,000operations, 10,000 in selling, marketing and distribution; 4,000distribution, 5,000 in clinical, regulatory and research and development;development and 3,0004,000 in administration. Of these employees, we employed approximately 14,00017,000 outside the U.S., approximately 8,00010,000 of whom are in the manufacturing operations function.

Community Outreach

We are committed to Advancing Science to transform the lives of others and the communities we all call home. We bring this commitment to lifeunited by supporting local, regional and global health and education initiatives, striving to improve patient advocacy, adhering to strong ethical standards that deliver on our commitments, and minimizing our impact on the environment.

We know that the world can be transformed when we apply the forces of compassion and the spirit of possibilitya goal to make a difference in the lives of the 30 million patients we serve. We envision what is possible for communities todayaround the world by giving our time and inresources to positively impact the future. When people have greaterlives of others. Guided by our core values, we seek to improve access to healthcare, to invest in educational programming for students with limited means and access to opportunities, and to support and embrace the spirit of volunteerism within our global workforce, while adhering to strong ethical standards. We also recognize the need to minimize the impact of the manufacturing of our products on the environment and have committed to carbon neutrality in our manufacturing and key distribution sites by 2030.

In some parts of the world, access to health information, screening, care and when children are given the opportunity to achieve academically, communities become healthy and vibrant. For example, by workingservices can be limited. We have partnered with Project HOPE (Health Opportunities for People Everywhere) and Partners in 2016, thousandsHealth to increase the number of peoplehealthcare workers in the Ranchi District inSouth Africa, India and in rural Johannesburg, South Africa were screened for chronic diseases, such as diabetesMexico. By increasing the number and hypertension. Not only were people informed about their health risks and educated about prevention, but new screening protocols were implemented andproficiency of community healthcare workers, were trained to provide services wellwe can impact health outcomes for people today and into the future. In 2018, we added to our list of Global Health Grantees by supporting the Children’s HeartLink (CHL) team based in Malaysia. During the year, CHL began formal collaboration with the Malaysian Pediatric Cardiac Society (MPCS) to increase access to high quality pediatric cardiac care for all children in Malaysia. All of our Global Health grants aim to increase the number of healthcare workers, increase screening and awareness about non-communicable diseases, provide an opportunity for our local in-country teams to get involved with our grantees and align with the United Nations Sustainable Development Goal Number Three - GOOD HEALTH AND WELL-BEING: Ensuring healthy lives and promoting the well-being for all at all ages is essential to sustainable development.

We are also inspired by young learners who share our passion for innovation and problem solving. Our focus onemployees work with students around the next generation of innovators is evident in the over 150world and share their passion for Science, Technology, Engineering and Math (STEM) through participation in more than 200 STEM events and school programs we collaborated on with others to supportprograms. Beyond the ever-curious minds of young learners around the world. Last year,classroom, our employees provided more than 3,000 employee volunteers dedicated their time and talent43,000 hours of community service to make a positive impact at more than 350600 global community events in 2133 countries. Building on our culture of caring, in 2017, we created an Employee Disaster Relief Fund to support families impacted by large natural weather events and disasters. In 2018, many families impacted by Hurricane Maria continued to benefit from resources from this fund, with our employees and the Company donating nearly $1 million dollars to the fund. In addition, we hosted six employee fundraising

Throughcampaigns to support other natural disasters that impacted people around the world. More than 200 employees contributed to these campaigns, which was combined with a Company match and funds donated to the various charitable organizations in support of disaster relief efforts.

We also support the five U.S. communities where we have significant business presences through the Boston Scientific Foundation. The mission of the foundation is simple: to help expand access to quality health care and educational opportunities for underserved populations. The Boston Scientific Foundation awarded nearly $1 million dollars in grant awards to more than 4050 nonprofit organizations across the U.S. received nearly a million dollars in grant awards in 2016. These community grants are targeted2018. The process involved more than 65 employee volunteers who evaluated proposals for the Boston Scientific Foundation Board review and approval, upon which the Boston Scientific Foundation was able to benefit disadvantaged populations by investing in programs that increasehelp fuel grassroots innovative solutions to improve access to quality healthcare and improve educationalcreate new opportunities particularly relatedfor students to STEM education. In addition, the Foundation also provides scholarships to college-bound students of U.S. based Boston Scientific employees.learn and achieve.

Seasonality

Our worldwidenet sales are influenced by many factors, including product launches, acquisitions, regulatory and reimbursement approvals, patient, physician and employee holiday schedules and other macro-economic conditions. While our net sales do not reflect any significant degree of seasonality; however,seasonality, customer purchases have historically been lower in the first and third quarterquarters of the year, as compared to other quarters. This reflects, among other factors, lower demand during summer months in the northern hemisphere, particularly in European countries.year.

Available Information

Copies of our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")Exchange Act), are available free of charge on our website (www.bostonscientific.com) as soon as reasonably practicable after we electronically file the material with or furnish it to the U.S. Securities and Exchange Commission (SEC). Additionally, the SEC maintains an internet site (www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. Printed copies of these posted materials are also available free of charge to stockholders who request them in writing from Investor Relations, 300 Boston Scientific Way, Marlborough, MA 01752-1234. Information on our website or linked to our website is not incorporated by reference into this Annual Report.

Safe Harbor for Forward-Looking Statements

Certain statements that we may make from time to time, including statements contained in this Annual Report and information incorporated by reference into this Annual Report, constitute “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 as amended (the Securities Act), and Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act).1934. Forward-looking statements may be identified by words like “anticipate,” “expect,” “project,” “believe,” “plan,” “may,” “estimate,” “intend”“intend,” “aiming” and similar words. These forward-looking statements are based on our beliefs, assumptions and estimates using information available to us at the time and are not intended to be guarantees of future events or performance. If our underlying assumptions turn out to be incorrect, or if certain risks or uncertainties materialize, actual results could vary materially from the expectations and projections expressed or implied by our forward-looking statements. As a result, readers are cautioned not to place undue reliance on any of our forward-looking statements. Except as required by law, we do not intend to update any forward-looking statements even if new information becomes available or other events occur in the future.


The forward-looking statements in this Annual Report are based on certain risks and uncertainties, including the risk factors described in Item 1A under the heading “Risk Factors” and the specific risk factors discussed below and in connection with forward-looking statements throughout this Annual Report, which could cause actual results to vary materially from the expectations and projections expressed or implied by our forward-looking statements. These factors,risks and uncertainties, in some cases, have affected and in the future could affect our ability to implement our business strategy and may cause actual results to differ materially from those contemplated by the statements expressed in this Annual Report. As a result, readers are cautioned not to place undue reliance on any of our forward-looking statements. These additional factorsRisks and uncertainties that may cause such differences include, among other things,things: future economic, political, economic, competitive, reimbursement and regulatory conditions;conditions, new product introductions;introductions and the market acceptance of those products, markets for our products, expected pricing environment, expected procedural volumes, the closing and integration of acquisitions, clinical trial results, demographic trends;trends, intellectual property;property rights, litigation, and governmental investigations; financial market conditions;conditions, the execution and effect of our restructuring program, the execution and effect of our business strategy, including our cost-savings and growth initiatives and future business decisions made by us and our competitors, allcompetitors. New risks and uncertainties may arise from time to time and are difficult to predict. All of whichthese factors are difficult or impossible to predict accurately and many of whichthem are beyond our control. We caution each readerFor a further list and description of these and other important risks and uncertainties that may affect our future operations, see Item 1A. Risk Factors contained within this Annual Report on Form 10-K filed with the SEC, which we may update in Part II, Item 1A. Risk Factors in subsequent Quarterly Reports on Form 10-Q that we will file hereafter. We disclaim any intention or obligation to consider carefully these factors.publicly update or revise any forward-looking statement to reflect any change in our expectations or in events, conditions, or circumstances on which those expectations may be based, or that may affect the likelihood

that actual results will differ from those contained in the forward-looking statements. This cautionary statement is applicable to all forward-looking statements contained in this Annual Report.

The following are some of the important risk factors that could cause our actual results to differ materially from our expectations in any forward-looking statements. For further discussion of these and other risk factors, see Item 1A -1A. Risk Factors.

Our Businesses
 
Our ability to increase net sales, expand the market, and capture market share;share and adapt to market volatility,

The volatility of the coronary stent market and our ability to increase our drug-eluting stent systems net sales, including with respect to our SYNERGY™, Promus PREMIER™ and PROMUS™ Element™ stent systems, and capture market share;

The on-goingongoing impact on our business of physician alignment to hospitals, governmental investigations and audits of hospitals and other market and economic conditions on the overall number of procedures performed;performed,

Competitive offerings and related declines in average selling prices for our products, particularly our drug-eluting coronary stent systems and our CRM products;

The performance of, and physician and patient confidence in, our products and technologies or those of our competitors;competitors,

The impact and outcome of ongoing and future clinical trials and market studies undertaken by us, our competitors or other third parties or perceived product performance of our or our competitors' products;products,
 
Variations in clinical results, reliability or product performance of our and our competitor's products;competitors' products,

Our ability to acquire or develop, launch and supply new or next-generation products and technologies worldwide and across our businesses in line with our commercialization strategies in a timely and successful manner includingand with respect to our S-ICD® system and the acquisition and integration of Neovasc, Inc., EndoChoice Holdings, Inc., the Resectr™ Tissue Resection Device from Distal Access, LLC, the LumenR™ Tissue Retractor System from LumenR LLC, Cosman Medical, Inc., the interventional radiology portfolio of CeloNova Biosciences, the American Medical Systems male urology portfolio and Xlumena, Inc.;recent acquisitions,

The effect of consolidation and competition in the markets in which we do business or plan to do business;business,

Disruption in the manufacture or supply of certain components, materials or products, or the failure to secure in a timely manner alternative manufacturing or additional or replacement components, materials or products, in a timely manner;

Our ability to retain and attract key personnel;personnel,

The impact of enhanced requirements to obtain regulatory approval in the U.S. and around the world, including the associated timing and cost of product approval;approval, and
 
The impact of increased pressure on the availability and rate of third-party reimbursement for our products and procedures in the U.S. and around the world, including with respect to the timing and costs of creating and expanding markets for new products and technologies.

Regulatory Compliance, Litigation and LitigationData Protection

The impact of healthcare policy changes and legislative or regulatory efforts in the U.S., the EU and around the world to modify product approval or reimbursement processes, including a trend toward demonstrating clinical outcomes, comparative effectiveness and cost efficiency, as well as the impact of other healthcare reform legislation;legislation,

Risks associated with our regulatory compliance and quality systems and activities in the U.S., the EU and around the world, including meeting regulatory standards applicable to manufacturing and quality processes;processes,

Our ability to minimize or avoid future field actions or FDA warning letters relating to our products and processes and the on-goingongoing inherent risk of potential physician advisories related to medical devices;devices,

The impact of increased scrutiny of and heightened global regulatory enforcement facing the medical device industry arising from political and regulatory changes, economic pressures or otherwise, including under U.S. Anti-Kickback Statute, U.S. False Claims Act and similar laws in other jurisdictions;jurisdictions, U.S. Foreign Corrupt Practices Act (FCPA) and/orand similar laws in other jurisdictions, and U.S. and foreign export control, trade embargo and custom laws;customs laws,

Costs and risks associated with litigation;litigation,


The effect of our litigation and risk management practices, including self-insurance and compliance activities on our loss contingencies, legal provision and cash flows;flows,
 
The impact of, diversion of management attention as a result of, and costs to cooperate with, litigate and/or resolve governmental investigations and our class action, product liability, contract and other legal proceedings; andproceedings,

Risks associated with aThe possibility of failure to protect our intellectual property rights and the outcome of patent litigation.litigation, and

Our ability to properly operate our information systems that support our business operations and protect our data integrity and products from a cyber-attack or other breach that has a material adverse effect on our business, reputation or results of operations.

Innovation and Certain Growth Initiatives

The timing, size and nature of our strategic growth initiatives and market opportunities, including with respect to our internal research and development platforms and externally available research and development platforms and technologies and the ultimate cost and success of those initiatives and opportunities;opportunities,

Our ability to complete planned clinical trials successfully, obtain regulatory approvals and launch new and next generation products in a timely manner consistent with cost estimates, including the successful completion of in-process projects from in-process research and development;development,

Our ability to identify and prioritize our internal research and development project portfolio and our external investment portfolio on profitable revenue growth opportunities as well as to keep them in line with the estimated timing and costs of such projects and expected revenue levels for the resulting products and technologies;technologies,

Our ability to successfully develop, manufacture and market new products and technologies in a timely and successful manner and the ability of our competitors and other third parties to develop products or technologies that render our products or technologies noncompetitive or obsolete;obsolete,

The impact of our failureOur ability to succeed at our decisionexecute appropriate decisions to discontinue, write-down or reduce the funding of any of our research and development projects, including in-process projects from in-process research and development, in our growth adjacencies or otherwise;otherwise,

DependenceOur dependence on acquisitions, alliances or investments to introduce new products or technologies and to enter new or adjacent growth markets and our ability to fund them or to fund contingent payments with respect to those acquisitions, alliances and investments;investments, and

The potential failure to successfully integrate and realize the expected benefits from the strategic acquisitions, alliances and investments we have consummated or may consummate in the future.


International Markets

Our dependency on international net sales to achieve growth, including in emerging markets;markets,

The impact of changes in our international structure and leadership;leadership,

Risks associated with international operations and investments, including theThe timing and collectability of customer payments,

The political and economic conditions protection(including the impact of the United Kingdom's exit from the EU, often referred to as "Brexit"),

Protection of our intellectual property, compliance

Our ability to comply with established and developing U.S. and foreign legal and regulatory requirements, including FCPA and similar laws in other jurisdictions and

Our ability to comply with U.S. and foreign export control, trade embargo and custom laws, as well as


The impact of changes in reimbursement practices and policies;policies in both the U.S. and abroad,

Our ability to maintain or expand our worldwide market positions in the various markets in which we compete or seek to compete, including through investments in product diversification and emerging markets such as Brazil, Russia, India and China;China,

Our ability to execute and realize anticipated benefits from our investments in emerging markets;markets, and

The potential effect of foreign currency fluctuations and interest rate fluctuations on our net sales, expenses and resulting margins.

Liquidity

Our ability to generate sufficient cash flow to fund operations, capital expenditures, global expansion initiatives, any litigation settlements and judgments, share repurchases and strategic investments and acquisitions as well as maintaining our investment grade ratings and managing our debt levels and covenant compliance;compliance,

Our ability to access the public and private capital markets when desired and to issue debt or equity securities on terms reasonably acceptable to us;us,

The unfavorable resolution of open tax matters, exposure to additional tax liabilities and the impact of changes in U.S. and international tax laws;laws,

The impact of examinations and assessments by domestic and international taxing authorities on our tax provision, financial condition or results of operations;operations,

The possibility of counterparty default on our derivative financial instruments,

The impact of potential intangible asset impairment charges, including on our results of operations, and

Our ability to collect outstanding and future receivables and/or sell receivables under our factoring programs.

Cost Reduction and Optimization Initiatives

Risks associated with significant changes made or expected to be made to our organizational and operational structure, pursuant to our 2016 Restructuring planrestructuring plans as well as any further restructuring or optimization plans we may undertake in the future and our ability to recognize benefits and cost reductions from such programs;programs and

Business disruption and employee distraction as we execute our global compliance program, restructuring and optimization plans and divestitures of assets or businesses and implement our other strategic and cost reduction initiatives.



ITEM 1A. RISK FACTORS
In addition to the other information contained in this Annual Report and the exhibits hereto, the following risk factors should be considered carefully in evaluating our business. Our business, financial condition, cash flows or results of operations could be materially adversely affected by any of these risks. This section contains forward-looking statements. You should refer to the explanation of the qualifications and limitations on forward-looking statements set forth at the end of Item 11. Business of this Annual Report. Additional risks not presently known to us or that we currently deem immaterial may also adversely affect our business, financial condition, cash flows or results of operations.
We face intense competition and may not be able to keep pace with the rapid technological changes in the medical devices industry, which could have an adverse effect on our business, financial condition or results of operations.
The medical device markets in which we primarily participate are highly competitive. We encounter significant competition across our product lines and in each market in which our products are sold from various medical device companies, somecompanies. Some of whichour competitors may have greater financial and marketing resources than we do, including as a result of consolidation among our competitorscompanies in the healthcareour industry. Our primary competitors include Abbott Laboratories;Laboratories, Medtronic plc;plc and Cook Medical, as well as a wide range of medical device companies that sell a single or limited number of competitive products or which participate in only a specific market segment.segment or set of segments. We also face competition from non-medical device companies, including pharmaceutical companies, which may offer alternative therapies for disease states intendedalso amenable to be treatedtreatment using our products. New direct or indirect competitors may emerge in the future, potentially including companies introducing new sales or distribution models to our industry.
Additionally,In addition, the medical device markets in which we primarily participate are characterized by extensive research and development and rapid technological change. Developments by other companies of new products and/or improved products,services, processes or technologies may make our products or proposed products obsolete or less competitive and may negatively impact our net sales. We are requiredIt is necessary for us to devote continued efforts and financial resources to developthe development or acquireacquisition of scientifically advanced technologies and products,products. In addition, we will need to apply our technologies cost-effectively across product lines and markets, obtain patent and other protection for our technologies and products, obtain required regulatory and reimbursement approvals and successfully manufacture and market our products consistent with our quality standards. If we fail to develop or acquire new products or enhance existing products, itsuch failure could have a material adverse effect on our business, financial condition or results of operations. In addition, a delay in the timing of the launch of next-generation products and the overall performance of, and continued physician confidence in, those products may result in declines in our market share and have an adverse impact on our business, financial condition or results of operations.
We may experience declines in market size, average selling prices for our products, medical procedure volumes and our share of the markets in which we compete, which may materially adversely affect our results of operations and financial condition.
We continue to experience pressures across many of our businesses due to competitive activity, increased market power of our customers as the healthcare industry consolidates, economic pressures experienced by our customers and the impact of managed care organizations and other third-party payers. These and other factors may adversely impact market sizes, as well as our share of the markets in which we compete, the average selling prices for our products or medical procedure volumes. There can be no assurance that the size of the markets in which we compete will increase above existing levels, that we will be able to regain or gain market share or compete effectively on the basis of price or that the number of procedures in which our products are used will increase above existing levels. Decreases in market sizes or our market share and declines in average selling prices or procedural volumes could materially adversely affect our results of operations or financial condition.

Continued consolidation in the healthcare industry or additional governmental controls exerted over pricing in key markets
could lead to increased demands for price concessions or limit or eliminate our ability to sell to certain of our significant market segments, which could have an adverse effect on our business, financial condition or results of operations.
Numerous initiatives and reforms by legislators, regulators and third-party payers to curb the rising cost of healthcare have catalyzed a consolidation of aggregate purchasing power.power within the markets in which we sell our products. As the healthcare industry consolidates, competition to provide products and services is expected to continue to intensify, resulting in pricing pressures, decreased average selling prices and the exclusion of certain suppliers from important market segments. We expect that market demand, government regulation, third-party coverage and reimbursement policies, government contracting requirements and societal pressures will continue to change the worldwide healthcare industry, resulting in further business consolidations and alliances among our customers, which may increase competition, exert further downward pressure on the prices of our products and services and may adversely impact our business, financial condition or results of operations.


Healthcare cost containment pressures, government payment and delivery system reforms, changes in private payer policies, and marketplace consolidations could decrease the demand for our products, the prices which customers are willing to pay for those products andand/or the number of procedures performed using our devices, which could have an adverse effect on our business, financial condition or results of operations.

Our products are purchased principally by hospitals, physicians and other healthcare providers around the world that typically bill various third-party payers, including governmentalgovernment programs, authorities or agencies (e.g., Medicare and Medicaid in the United States) and private health plans, for the healthcare services provided to their patients. Governments and payers may also institute changes in health carehealthcare delivery systems that may reduce funding for services or encourage greater scrutiny of health care costs. The ability of customers to obtain appropriate reimbursement for their products and services from private and governmental third-party payers is critical to the success of medical technology companies because it affects which products customers purchase and the prices they are willing to pay. Reimbursement variesand funding vary by country and can significantly impact the acceptance of new products and technologies and the use of established products and technologies. Even if we develop a promising new product, we may find limited demand for the product unless reimbursement approval is obtained from private and governmental third-party payers. Further legislative or administrative reforms to the reimbursement systems in the United States,U.S., Japan, or other countries in a manner that significantly reduces reimbursement for procedures using our medical devices or denies coverage for those procedures, including price regulation, competitive bidding and tendering, coverage and payment policies, comparative effectiveness of therapies, heightened clinical data requirements, technology assessments and managed-care arrangements, could have a material adverse effect on our business, financial condition or results of operations
We are subject to a number of market, business, financial, legal and regulatory risks and uncertainties with respect to our international operations that could have a material impact on our business, financial condition or results of operations.
International net sales accounted for approximately 4344 percent of our global net sales in 2016, with2018, which includes sales from emerging markets accounting for approximately 1011 percent. An important part of our growth strategy is to continue pursuing growth opportunities in net sales and market share outside of the U.S. by expanding global presence, including in emerging markets. Our international operations are subject to a number of market, business and financial risks and uncertainties, including those related to politicalgeopolitical and economic instability;instability, foreign currency exchange and interest rate fluctuations;fluctuations, competitive product offerings;offerings, local changes in health care financing and payment systems and health care delivery systems;systems, local product preferences and requirements, including preferences for local manufacturers; workforce instability;instability, less intellectual property protection in certain countries than exists in the United States;U.S. and, in certain foreign countries, longer accounts receivable cycles. Such risks and uncertainties may adversely impact our ability to implement our growth strategy in these markets and, as a result, our sales growth, market share and operating profits from our international operations may be adversely affected.
Our international operations are subject to established and developing legal and regulatory requirements for medical devices in each country in which our products are marketed and sold. Most foreign countries have medical device regulations. Further, most countries outside of the U.S. require product approvals be renewed or recertified on a regular basis in order to continue to be marketed and sold there. In addition, several countries that previously did not have regulatory requirements for medical devices have established such requirements in recent years and other countries have expanded, or plan to expand, on existing regulations, including requiring local clinical data in addition to global clinical data. These factors have caused or may cause us to experience more uncertainty, risk, expense and delay in commercializing products in certain foreign jurisdictions, which could affect our ability to obtain approvals for our products in those jurisdictions and adversely impact our net sales, market share and operating profits from our international operations.
Further, international markets are affected by economic pressure to contain healthcare costs, which can lead to more rigorous evidence requirements and     lower reimbursement rates for either our products directly or procedures in which our products are used. Governments and payers may also institute changes in health care delivery systems that may reduce funding for services or encourage greater scrutiny of health care costs. In addition, certain international markets may also be affected by foreign government efforts to reference reimbursement rates in other countries. All of these types of changes may ultimately reduce selling prices of our products and/or reduce the number of procedures in which our products are used, which may adversely impact our net sales, market share and operating profits from our international operations.

In addition, our international operations are subject to other established and developing U.S. and foreign legal and regulatory requirements, including the U.S. Foreign Corrupt Practices Act (FCPA) and/or similar laws in other countries;countries and U.S. and foreign import and export controls and licensing requirements, trade protection and embargo measures and customs laws. Global businesses, including those in the medical device industry, are facing increasing scrutiny of, and heightened enforcement efforts with respect to, their international operations. Any alleged or actual failure to comply with legal and regulatory requirements may subject us to government scrutiny, civil and/or criminal proceedings, sanctions and other liabilities, which may have a material adverse effect on our international operations, financial condition, results of operations and/or liquidity.

FollowingIn a referendum inon June 23, 2016, in which voters inapproved for the United Kingdom (UK) approved anto exit fromthe European Union (EU). As it stands, the UK will depart the EU the UK government is expected to initiate a process to withdraw from the EU (often referred to as “Brexit”) and begin negotiatingon March 30, 2019 but the terms of its withdrawal and the UK’snature of its future relationship with the EU. A withdrawal could, among other outcomes, resultEU are still being decided. Future exit of the UK from the EU will have numerous consequences in all areas of the business, including, economic, regulatory, operational, and the actual impact depends on the ultimate deal reached and is very difficult to assess at this time. Changes in the deteriorationindustry regulations could have an effect on existing CE certificates being renewed and new certificates being issued which would impact the ability to trade; however, it is impossible to assess the full impact at this stage.

In December of economic conditions, volatility2017, EU leaders announced an agreement to begin the next phase of negotiations, with talks on a transition period after March 2019 to begin in currency exchange rates,early 2018 and increased regulatory complexities. These outcomes may adversely affect our business, financial condition or resultsdiscussions on the future UK-EU relationship, including trade and security, to begin in March. At this stage, the materiality to us of operations.the Brexit risk factor remains unknown and unquantifiable. 

Any significant changes in the political and economic, financial, competitive, legal and regulatory or reimbursement conditions where we conduct, or plan to expand, our international operations may have a material impact on our business, financial condition or results of operations.
If we are unable to manage our debt levels, maintain investment grade credit ratings at the three ratings agencies, or experience a disruption in our cash flows it could have an adverse effect on our cost of borrowing, financial condition or results of operations.
As part of our strategy to maximize stockholder value, we use financial leverage to reduce our cost of capital. Our outstanding debt balance was $5.484$7.056 billion as of December 31, 20162018 and $5.677$5.616 billion as of December 31, 2015.2017. Although we currently have investment grade ratings at Moody's Investor Service, Standard & Poor's Rating Service and Fitch Ratings, our inability to maintain investment grade credit ratings could increase our cost of borrowing funds in the future.future and reduce our access to liquidity. Delays in our product development and new product launches could result in disruption in our cash flow or our ability to continue to effectively manage our debt levels could have an adverse effect on our cost of borrowing, financial condition or results of operations. In addition, our credit and security facilities contain covenants that require us to maintain specified financial ratios and place other limits on our business. If we are unable to satisfy these covenants, we may be required to obtain waivers from our lenders and no assurance can be made that our lenders would grant such waivers on favorable terms or at all and we could be required to repay any borrowings on demand.
We may record future goodwill impairment charges or otherintangible asset impairment charges related to one or more of our global reporting units, which could materially adversely impact our results of operations.
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 impairment may exist. We assess goodwill for impairment at the reporting unit level and, in evaluating the potential for impairment of goodwill, we make assumptions regarding estimated revenue projections, growth rates, cash flows and discount rates. In the second quarter of 2016,2018, we performed our annual goodwill impairment test for all of our reporting units. In conjunction with our annual test, the fair value of each reporting unit exceeded its carrying value. Therefore, it was deemed not necessary to proceed to the second stepvalue and none of the impairment test.our reporting units were at risk of impairment. Refer to Critical Accounting Policies and Estimates within ourcontained in Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations contained in Item 7 of this Annual Report on Form 10-K 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 and other intangible assets. Relatively small declines in the future performance and cash flows of a reporting unit or asset group, 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, or small changes in other key assumptions, may result in the recognition of significant asset impairment charges, which could have a material adverse impact on our results of operations.
Failure to integrate acquired businesses into our operations successfully could adversely affect our business, financial condition and operating results.
As part of our strategy to realign our business portfolio, we have completed severalmultiple acquisitions in 2016, 2015 and 2014over the past three years and may pursue additional acquisitions in the future. Our integration of acquired businesses requires significant efforts, including corporate restructuring and the coordination of information technologies, research and development, sales and marketing, operations, regulatory, supply chain, manufacturing, quality systems and finance. These efforts result in additional expenses and involve significant management time. Some of the factors that could affect the success of our acquisitions include, among others, the effectiveness of our due diligence process, our ability to execute our business plan for the acquired companies, the strength of the acquired technology, results of clinical trials, regulatory approvals and reimbursement levels of the acquired products and related procedures, the continued performance of critical transition services, our ability to adequately fund acquired in-process

research and development projects and retain key employees and our ability to achieve synergies with our acquired companies, such as increasing sales of our products, achieving cost savings and effectively combining technologies to develop new products. In addition, foreign acquisitions involve unique risks, including those related to integration of operations across different geographies, cultures and languages;languages, currency risks;risks and risks associated with the economic, political, legal and regulatory environment in specific countries. Our failure to manage successfully and coordinate the growth of the acquired companies could have an adverse impact on our business and our future growth. In addition, we cannot be certain that the businesses we acquire will become profitable or remain

so, and if our acquisitions are not successful, we may record related asset impairment charges in the future or experience other negative consequences on our results.
We may not be successful in our strategy relating to future strategic acquisitions of, investments in, or alliances with, other companies and businesses, which have been a significant source of historical growth for us, and will be key to our diversification into new markets and technologies.
Our strategic acquisitions, investments and alliances are intended to further expand our ability to offer customers effective, high quality medical devices that satisfy their interventional needs. These acquisitions, investments and alliances have been a significant source of our growth. If we are unsuccessful in our acquisitions, investments and alliances, we may be unable to grow our business. The success of our strategy relating to future acquisitions, investments or alliances will depend on a number of factors, including:

our ability to identify suitable opportunities for acquisition, investment or alliance, if at all;all,

our ability to manage acquisition, investment or alliance opportunities within our capital capacity and prioritize those investments to execute on our strategy,
theour ability ofto manage our due diligence process to uncover potential issues with target companies;

targets,
our ability to finance any future acquisition, investment or alliance on terms acceptable to us, if at all;all,

whether we are ableour ability to complete acquisitions, investments or alliances in a timely manner on terms that are satisfactory to us, if at all;

all,
our ability to successfully integrate and operate acquired businesses;

businesses,
our ability to successfully identify and retain key target employees;

employees,
our ability to comply with applicable laws and regulations, including foreign laws and regulations;regulations and

our ability to protect intellectual property and to prevail in litigation related to newly acquired technologies. 

Any potential future acquisitions we consummate may be dilutive to our earnings and may require additional debt or equity financing, depending on their size or nature.

We may not realize the expected benefits from our restructuring and optimization initiatives;initiatives, our long-term expense reduction programs may result in an increase in short-term expense;expenses and our efforts may lead to unintended consequences.

We monitor the dynamics of the economy, the healthcare industry and the markets in which we compete and assess opportunities for improved operational effectiveness and efficiency and to better align expenses with revenues, while preserving our ability to make investments in research and development projects, capital and our people that we believe are important to our long-term success. As a result of these assessments, we have undertaken restructuring and optimization initiatives in order to enhance our growth potential and position us for long-term success. For example, in June 2016,November 2018, we announced a restructuring initiative (the “20162019 Restructuring Plan”)Plan) intended to develop global commercialization, technologysupport our effort to improve operating performance and manufacturing capabilities in key growth markets, build on our Plant Network Optimization (PNO) strategy which is intendedmeet anticipated market demands by ensuring that we are appropriately structured and resourced to simplify our manufacturing plant structure by transferring certain production lines among facilities,deliver sustainable value to patients and expand operational efficiencies in support of our operating income margin goals.customers. Key activities under the 20162019 Restructuring Plan include strengtheningsupply chain network optimization intended to maximize our global infrastructure through evolving global real estate and workplaces, developing global commercial and technical competencies, enhancing manufacturing and distribution expertise in certain regions,network capacity and continuing implementation of our PNO strategy. Activities under the plan were initiated in the second quarter of 2016 andbuilding functional capabilities that support business growth. These activities are expected to be substantially completedinitiated in 2019, with the majority of activity expected to be complete by the end of 2018.2021. The 20162019 Restructuring Plan is expected to result in total pre-tax charges of approximately $175$200 million to $225$300 million and reduce gross annual pre-tax operating expenses by approximately $115$100 million to $150 million by the end of 20202022 as program benefits are realized. We expect a substantial portion of the savings to be reinvested in strategic growth initiatives. Expense reduction initiatives under the plan include various cost and efficiency improvement measures, which may include movement of business activities, facility consolidations and closures, and the transfer of product lines between manufacturing facilities, which, due to the highly regulated nature of our industry, requires a significant investment in time and cost to create duplicate manufacturing lines, run product validations, and seek regulatory approvals. These measures could yield unintended consequences, such as distraction of our management and employees, business disruption, inability to attract or retain key personnel and reduced employee productivity, which could negatively affect our business, sales, financial condition and results of operations. Moreover, our restructuring and optimization initiatives result in charges and expenses thatsome of which impact our operating results. We cannot guarantee that the activities under the 2016 Restructuring Planour restructuring plans or other optimization initiatives will result in the desired efficiencies and estimated cost savings.


Current domestic and international economic conditions could adversely affect our cash flows and results of operations.

Uncertainty about global economic conditions, including as a result ofthose resulting from credit and sovereign debt issues, has caused and may continue to cause disruption in the financial markets, including diminished liquidity and credit availability. These conditions

may adversely affect our suppliers, leading them to experience financial difficulties or to be unable to borrow money to fund their operations, which could cause disruptions in our ability to produce our products. Our customers may experience financial difficulties or be unable to borrow money to fund their operations, which may adversely impact their ability or decision to purchase our products, particularly capital equipment, or to pay for our products they do purchase on a timely basis, if at all. In addition, we have accounts receivable factoring programs in certain European countries. Continued deterioration of the global economy or increase in sovereign debt issues may impact our ability to transfer receivables to third parties in certain of those countries in the future. Third parties such as banks offering factoring programs in these countries are looking to reduce their exposure levels to government owned or supported debt. This could result in terminations of, or changes to the costs or credit limits of our existing factoring programs. Such terminations or changes could have a negative impact on our cash flow and days sales outstanding.

The strength and timing of economic recovery remains uncertain and there can be no assurance that there will not be further deterioration in the global economy. Accordingly, we cannot predict to what extent global economic conditions, including sovereign debt issues and increased focus on healthcare systems and costs in the U.S. and abroad, may continue to impact negatively impact our average selling prices, net sales and profit margins, procedural volumes and reimbursement rates from third party payers. In addition, conditions in the financial markets and other factors beyond our control may adversely affect our ability to borrow money in the credit markets, access the capital markets and to obtain financing for acquisitions or other general corporate and commercial purposes.

Healthcare policy changes, including healthcare reform legislation, may have a material adverse effect on our business, financial condition, results of operations and cash flows.

Political, economic and policy influences are leading the healthcare industry to make substantial structural and financial changes that will continue affecting our results of operations. Government and private sector initiatives limiting the growth of healthcare costs (including price regulation), coverage and payment policies, comparative effectiveness of therapies, technology assessments and healthcare delivery structure reforms, are continuing in many countries where we do business. We believe that these changes are causing the marketplace to put increased emphasis on the delivery of more treatments that can reduce costs, improve efficiencies and/or increase patient access. Although we believe our less-invasive products and technologies generate favorable clinical outcomes, value and cost efficiency, the resources necessary and evidence necessary to demonstrate value to our customers, patients, payers and other stakeholders may be significant and it may take a longer period of time to gain widespread adoption. Moreover, there can be no assurance that our strategies will succeed for every product.

The Patient Protection and Affordable Care Act (ACA) and Health Care and Education Affordability Reconciliation Act of 2010 were enacted into law in the U.S. in March 2010. As a U.S. headquartered company with significant domestic sales, in the United States, the medical device tax included in this law has materially affected us. The law imposed on medical device manufacturers a 2.3 percent excise tax on U.S. sales of Class I, II and III medical devices beginning in January 2013. Under the current administration, there may be a permanent repeal or an alteration of some or all elements of the ACA, but at this time it is not definite that a change will be enacted or what new healthcare provisions may be implemented. While the implementation of the medical device tax has been suspended until December 31, 2017,2019, the status of the tax for sales after December 31, 20172019 is not clear. The tax may continue to be suspended or may be reinstated at the same or at a different level.level effective January 1, 2020. Other provisions of this law, including comparative effectiveness research, pilot programs to evaluate alternative payment methodologies and other changes to the payment systems, could meaningfully changehave started changing the way healthcare is developeddelivered, reimbursed and delivered, andfunded. While the extent to which it has affected our business is not clear, these changes, over the long-term, may adversely affect our business and results of operations.

We cannot predict the specific healthcare programs and regulations that will be ultimately implemented by regional and national governments globally. However, any changes that lower reimbursements for either our products and/or procedures using our products reduce medical procedure volumes and/or increase cost containment pressures on us or others in the healthcare sector could adversely affect our business and results of operations.

We are subject to extensive and dynamic medical device regulation, which may impede or hinder the approval or sale of our products and, in some cases, may ultimately result in an inability to obtain approval of certain products or may result in the recall or seizure of previously approved products.
Our products, marketing, sales and development activities and manufacturing processes are subject to extensive and rigorous regulation by the FDA pursuant to the Federal Food, Drug and Cosmetic Act (FDC Act), by comparable agencies in foreign countries and by other regulatory agencies and governing bodies. Under the FDC Act, medical devices must receive FDA clearance or approval or an exemption from such clearance or approval before they can be commercially marketed in the U.S. In the European Union,EU, we are required to comply with applicable medical device directives (including the Medical Devices Directive and the Active Implantable Medical Devices Directive)Directive and beginning in May 2020, the European Medical Device Regulation) and obtain CE

Mark certification in order to market medical devices. The CE Mark is applied following approval from an independent notified body or declaration of conformity. The process of obtaining marketing approval or clearance from the FDA or by comparable agencies in foreign countries for new products, or with respect to enhancements or modifications to existing products, could:

take a significant period of time;

time,
require the expenditure of substantial resources;

resources,
involve rigorous pre-clinical and clinical testing, as well as increased post-market surveillance;

surveillance,
require changes to products;products and

result in limitations on the indicated uses of products.
 
In addition, exported devices are subject to the regulatory requirements of each country to which the device is exported. Some countries do not have medical device regulations, but in most foreign countries, medical devices are regulated. Frequently, regulatory approval may first be obtained in a foreign country prior to application in the U.S. due to differing regulatory requirements; however, other countries, such as China for example, require approval in the country of origin or legal manufacturer first. Most countries outside of the U.S. require that product approvals be renewed or recertified on a regular basis, generally every four to five years. The renewal or recertification process requires that we evaluate any device changes and any new regulations or standards relevant to the device and conduct appropriate testing to document continued compliance. Where renewal or recertification applications are required, they may need to be renewed and/or approved in order to continue selling our products in those countries. There can be no assurance that we will receive the required approvals for new products or modifications to existing products on a timely basis or that any approval will not be subsequently withdrawn or conditioned upon extensive post-market study requirements.

Our global regulatory environment is becoming increasingly stringent and unpredictable, which could increase the time, cost and complexity of obtaining regulatory approvals for our products, as well as the clinical and regulatory costs of supporting those approvals. Several countries that did not have regulatory requirements for medical devices have established such requirements in recent years and other countries have expanded on existing regulations. Certain regulators are exhibiting less flexibility and are requiring local preclinical and clinical data in addition to global data. While harmonization of global regulations has been pursued, requirements continue to differ significantly among countries. We expect this global regulatory environment will continue to evolve, which could impact our ability to obtain future approvals for our products or could increase the cost and time to obtain such approvals in the future.

The European Union regulatory bodies will finalizefinalized a new Medical Device Regulation (MDR) in 2017, which will replacereplaced the existing Directives and will provideprovided three years for transition and compliance. The MDR will change several aspects of the existing regulatory framework, such as updating clinical data requirements and introduceintroducing new ones, such as Unique Device Identification (UDI). We and the Notified Bodies who will oversee compliance to the new MDR face uncertainties as the MDR is rolled out and enforced by the Commission and EEA Competent Authorities, creating risks in several areas, including the CE Marking process and data transparency, in the upcoming years.
The FDA and other worldwide regulatory agencies actively monitor compliance with local laws and regulations through review and inspection of design and manufacturing practices, recordkeeping, reporting of adverse events, labeling and promotional practices. The FDA can ban certain medical devices;devices, detain or seize adulterated or misbranded medical devices;devices, order repair, replacement or refund of these devices;devices and require notification of health professionals and others with regard to medical devices that present unreasonable risks of substantial harm to the public health. The FDA can take action against a company that promotes "off-label" uses. The FDA may also enjoin and restrain a company for certain violations of the FDC Act and other amending Acts pertaining to medical devices, or initiate action for criminal prosecution of such violations. Any adverse regulatory action, depending

on its magnitude, may restrict a company from effectively marketing and selling its products, may limit a company's ability to obtain future premarket clearances or approvals and could resultsresult in a substantial modification to the company'sour business practices and operations. International sales of medical devices manufactured in the U.S. that are not approved by the FDA for use in the U.S., or that are banned or deviate from lawful performance standards, are subject to FDA export requirements.
Regulations regarding the development, manufacture and sale of medical devices are evolving and subject to future change. We cannot predict what impact, if any, those changes might have on our business. Failure to comply with regulatory requirements could have a material adverse effect on our business, financial condition and results of operations. Later discovery of previously unknown problems with a product or manufacturer could result in fines, delays or suspensions of regulatory clearances or approvals, seizures or recalls of products, physician advisories or other field actions, operating restrictions and/or criminal prosecution. We may also initiate field actions as a result of a failure to strictly comply with our internal quality policies. The failure to receive product approval clearance on a timely basis, suspensions of regulatory clearances, seizures or recalls of products, physician advisories or other field actions, or the withdrawal of product approval by the FDA or by comparable agencies in foreign countries could have a material adverse effect on our business, financial condition or results of operations.

Our products are continually subject to clinical trials conducted by us, our competitors or other third parties, the results of which may be unfavorable,unexpected, or perceived as unfavorable by the market, and could have a material adverse effect on our business, financial condition or results of operations.
As a part of the regulatory process of obtaining marketing clearance for new products and new indications for existing products, we conduct and participate in numerous clinical trials with a variety of study designs, patient populations and trial endpoints. UnfavorableUnexpected or inconsistent clinical data from existing or future clinical trials conducted by us, by our competitors or by third parties, including acquired businesses prior to acquisition by us, or the FDA's or the market's perception of this clinical data, may adversely impact our ability to obtain product approvals, our position in, and share of, the markets in which we participate and our business, financial condition, results of operations or future prospects.
Our future growth is dependent upon the development of new products and enhancement of existing products, which requires significant research and development, clinical trials and regulatory approvals, all of which may be very expensive and time-consuming and may not result in commercially viable products.
In order to develop new products and enhance existing products, we focus our research and development programs largely on the development of next-generation and novel technology offerings across multiple programs and businesses. The development of new products and enhancement of existing products requires significant investment in research and development, clinical trials and regulatory approvals. The results of our product development efforts may be affected by a number of factors, including our ability to anticipate customer needs, innovate and develop new products, complete clinical trials, obtain regulatory approvals and reimbursement in the United States and abroad, manufacture products in a cost-effective manner, obtain appropriate intellectual property protection for our products and gain and maintain market approval of our products. There can be no assurance that any products now in development or that we may seek to develop in the future will achieve technological feasibility, obtain regulatory approval or gain market acceptance. If we are unable to develop and launch new products and enhanced products, our ability to maintain or expand our market position in the markets in which we participate may be materially adversely impacted. Further, we are continuing to investigate and have completed several acquisitions that involve opportunities to further expand our presence in and diversify into, priority growth areas by accessing new products and technologies. There can be no assurance that our investments will be successful or that we will be able to access new products and technologies on terms favorable to us, or that these products and technologies will achieve commercial feasibility, obtain regulatory approval or gain market acceptance. A delay in the development or approval of new products and technologies or our decision to reduce our investments may adversely impact the contribution of these technologies to our future growth.

Additionally, certain products or groups of products, in particular new products or enhancements of existing products, may have a disproportionate impact on our business, financial condition and results of operations. Failure to meet growth projections, poor clinical outcomes, increasing regulatory requirements, launch delays and inability to effectively scale manufacturing and achieve targeted margins with respect to any of these products or groups of products in particular may materially adversely impact on our business, financial condition and results of operations.

The medical device industry and its customers continue to face scrutiny and regulation by governmental authorities and are often the subject of numerous investigations, often involving marketing and other business practices or product quality issues including device recalls or advisories. These investigations could result in the commencement of civil and criminal proceedings; imposition of substantial fines, penalties and administrative remedies, including corporate integrity agreements, stipulated judgments or exclusion; diversion of our employees and management's attention; imposition of administrative costs and have an adverse effect on our financial condition, results of operations and liquidity; and may lead to greater governmental regulation in the future.
The medical devices we design, develop, manufacture and market are subject to rigorous regulation by the FDA and numerous other federal, state and foreign governmental authorities. These authorities continue to highly scrutinize our industry. We have received and in the future may receive, subpoenas and other requests for information from Congress and other state and federal governmental agencies, including, among others, the U.S. Department of Justice (DOJ), the Office of Inspector General of the Department of Health and Human Services (HHS), and the Department of Defense, as well as from foreign governments and agencies. The requests and/or subpoenas we have received relate primarily to financial arrangements with healthcare providers, regulatory compliance and sale and/or product promotional practices. We have cooperated with these subpoenas and other requests for information and expect to continue to do so in the future. We cannot predict when a matter will be resolved, the outcome of the matter or its impact on us and cooperation may involve significant costs, including document production costs. An adverse outcome in any matter could include the commencement of an investigation, civil and criminal proceedings;proceedings, substantial fines, penalties and administrative remedies, including exclusion from government reimbursement programs, entry into Corporate Integrity Agreements (CIAs) with governmental agencies and amendments to any existing CIAs. In addition, resolution of any matter could involve the imposition of additional and costly compliance obligations. For example, in 2009, we entered into a civil settlement with the DOJ regarding the DOJ's investigation relating to certain post-market surveys conducted by Guidant Corporation before we acquired Guidant in 2006. As part of the settlement, we entered into a 5-year CIA with the Office of Inspector General for HHS, which required various provisions, including enhancements to certain compliance procedures related to financial arrangements with healthcare providers. Cooperation with requests and investigations

from external agencies result in employee resource costs and diversion of employee focus. If any requests or investigations continue over a long period of time, they could divert the attention of management from the day-to-day operations of our business and impose significant additional administrative burdens on us. These potential consequences, as well as any adverse outcome from these requests or investigations, could have a material adverse effect on our financial condition, results of operations and liquidity.
In addition, certain foreign governments, state governments (including that of Massachusetts, where we are headquartered) and the U.S. federal government have enacted legislation aimed at increasing transparency of our interactions with healthcare providers. As an example, compliance with the U.S. Physician Payment Sunshine Act requires us by law to disclose payments and other transfers of value to all U.S. physicians and U.S. teaching hospitals at the U.S. federal level made after August 1, 2013. Any failure to comply with these legal and regulatory requirements could impact our business. In addition, we have and may continue to devote substantial additional time and financial resources to further develop and implement enhanced structure, policies, systems and processes to comply with enhanced legal and regulatory requirements, which may also impact our business.

We anticipate that governmental authorities will continue to scrutinize our industry closely and that additional regulation may increase compliance and legal cost and exposure to litigation and have additional adverse effects on our operations.
Changes in tax laws, unfavorable resolution of tax contingencies, or exposure to additional income tax liabilities could have a material impact on our financial condition, results of operations and/or liquidity.

We are subject to income taxes as well as non-income based taxes, in both the U.S. and various foreign jurisdictions. We are subject to on-goingongoing tax audits in various jurisdictions. Tax authorities may disagree with certain positions we have taken and assess additional taxes. We regularly assess the likely outcomes of these audits in order to determine the appropriateness of our tax provision, and we have established contingency reserves for material, known tax exposures. However, the calculation of such tax exposures involves the application of complex tax laws and regulations in many jurisdictions, as well as interpretations as to the legality under European Union state aid rules of tax advantages granted in certain jurisdictions. Therefore, there can be no assurance that we will accurately predict the outcomes of these disputes or other tax audits or that issues raised by tax authorities will be resolved at a financial cost that does not exceed our related reserves and the actual outcomes of these disputes and other tax audits could have a material impact on our results of operations or financial condition.

On July 19, 2016,Changes in tax laws and regulations, or their interpretation and application, in the jurisdictions where we entered into a Stipulation of Settled Issues with the Internal Revenue Service (IRS) intended to resolve certain transfer pricing issues, as well as certain issues related to our transaction with Abbott, for the 2001 through 2007 tax years. The Stipulation of Settled Issues is contingent upon IRS Office of Appeals (IRS Appeals) applying the same basis of settlement to all transfer pricing issues for the Company’s 2008, 2009, and 2010 tax years, and if applicable, review by the U.S. Congress Joint Committee on Taxation. In October 2016, we reached an agreement in principle with IRS Appeals as to the resolution of the

transfer pricing issues in 2008, 2009, and 2010 tax years,are subject to additional calculations of tax as well as documentation to memorialize our agreement. The final resolution of these issues is contingent and if the Stipulation of Settled Issues is not finalized, it could have a material impact on our financial condition, results of operations, or cash flows.

Additionally, changes in tax laws could materially impact our effective tax rate. For example, proposals for fundamentalThe U.S. corporate tax reform, if enacted the Tax Cuts and Jobs Act (TCJA) on December 22, 2017 and we expect the U.S. Treasury to issue future notices and regulations under the TCJA. Certain provisions of the TCJA and the regulations issued thereunder could have a significant adverse impact on our future results of operations. operations as could interpretations made by the Company in the absence of regulatory guidance and judicial interpretations.

Additionally, the U.S. Congress, government agencies in non-U.S.Organization for Economic Co-operation and Development (OECD), the European Commission (EC) and individual taxing jurisdictions where we and our affiliates do business and the Organization for Economic Co-operation and Development have recently focused on issues related to the taxation of multinational corporations. One example is in the area of “base erosion and profit shifting,” where profits are claimed to be earned for tax purposes in low-tax jurisdictions, or payments are made between affiliates from a jurisdiction with high tax rates to a jurisdiction with lower tax rates. The Organization for Economic Co-operation and DevelopmentOECD has released several components of its comprehensive plan to create an agreed set of international rules for fighting base erosion and profit shifting. In addition, the OECD, the EC and individual counties are examining changes to how taxing rights should be allocated among countries considering the digital economy. As a result, the tax laws in the U.S. and other countries in which we and our affiliates do business could change on a prospective or retroactive basis and any such changes could materially adversely affect our business.

Our operations in Puerto Rico and Costa Rica presently benefit from various tax incentives and grants. Unless these incentives and grants are extended, they will expire between 2023 and 2028. If we are unable to renew, extend, or obtain new incentive and grants, the expiration of the existing incentives and grants could have a material impact on our financial results in future periods.

We may not effectively be able to protect our intellectual property or other sensitive data, which could have a material adverse effect on our business, financial condition or results of operations.

The medical device market in which we primarily participate is largely technology driven. Physician customers have historically moved quickly to new products and new technologies. As a result, intellectual property rights, particularly patents and trade secrets, play a significant role in product development and differentiation. However, intellectual property litigation is inherently complex and unpredictable and appellate courts can overturn lower court decisions. Furthermore, as our business increasingly relies on technology systems and infrastructure, our intellectual property, other proprietary technology and other sensitive data are potentially vulnerable to loss, damage or misappropriation. Finally, our ability to protect novel business models is uncertain.

Competing parties in our industry frequently file multiple suits to leverage patent portfolios across product lines, technologies and geographies and to balance risk and exposure between the parties. In some cases, several competitors are parties in the same

proceeding, or in a series of related proceedings, or litigate multiple features of a single class of devices. These forces frequently drive settlement not only of individual cases, but also of a series of pending and potentially related and unrelated cases. In addition, although monetary and injunctive relief is typically sought, remedies and restitution are generally not determined until the conclusion of the trial court proceedings and can be modified on appeal. Accordingly, the outcomes of individual cases are difficult to time, predict or quantify and are often dependent upon the outcomes of other cases in other geographies.

A number of third parties have asserted that our current and former product offerings infringe patents owned or licensed by them. We have similarly asserted that products sold by our competitors infringe patents owned or licensed by us. Adverse outcomes in one or more of the proceedings against us could limit our ability to sell certain products in certain jurisdictions, or reduce our operating margin on the sale of these products and could have a material adverse effect on our financial condition, results of operations or liquidity.

Patents and other proprietary rights are and will continue to be essential to our business and our ability to compete effectively with other companies will be dependent upon the proprietary nature of our technologies. We rely upon trade secrets, know-how, continuing technological innovations, strategic alliances and licensing opportunities to develop, maintain and strengthen our competitive position. We pursue a policy of generally obtaining patent protection in both the U.S. and abroad for patentable subject matter in our proprietary devices and attempt to review third-party patents and patent applications to the extent publicly available in order to develop an effective patent strategy, avoid infringement of third-party patents, identify licensing opportunities and monitor the patent claims of others. We currently own numerous U.S. and foreign patents and have numerous patent applications pending. We also are party to various license agreements pursuant to which patent rights have been obtained or granted in consideration for cash, cross-licensing rights or royalty payments. No assurance can be made that any pending or future patent applications will result in the issuance of patents, that any current or future patents issued to, or licensed by, us will not be challenged or circumvented by our competitors, or that our patents will not be found invalid. In addition, we may have to take legal action in the future to protect our patents, trade secrets or know-how or to assert them against claimed infringement by others. Any legal action of that type could be costly and time consuming and no assurances can be made that any lawsuit will be successful. We are generally involved as both a plaintiff and a defendant in a number of patent infringement and other intellectual property-related actions. The invalidation of key patents or proprietary rights that we own, or an unsuccessful outcome in lawsuits to protect our intellectual property, could have a material adverse effect on our business, financial condition or results of operations.

In addition, the laws of certain countries in which we market and plan on manufacturing some of our products in the near future, do not protect our intellectual property rights to the same extent as the laws of the United States.U.S. If we are unable to protect our intellectual property in these countries, it could have a material adverse effect on our business, financial condition or results of operations.

Furthermore, our intellectual property, other proprietary technology and other sensitive data are potentially vulnerable to loss, damage or misappropriation from system malfunction, computer viruses and unauthorized access to our data or misappropriation or misuse thereof by those with permitted access and other events. While we have invested to protect our intellectual property, products and other data and continue to work diligently in this area, there can be no assurance that our precautionary measures will prevent breakdowns, breaches, cyber-attacks or other events. Such events could have a material adverse effect on our reputation, business, financial condition or results of operations.

We rely on the proper function, availability and security of information technology systems to operate our business and a cyber-attack or other breach of these systems could have a material adverse effect on our business, financial condition or results of operations.

We rely on information technology systems, including technology from third party vendors, to process, transmit and store electronic information in our day-to-day operations. Similar to other large multi-national companies, the size and complexity of our information technology systems makes them vulnerable to a cyber-attack, malicious intrusion, breakdown, destruction, loss of data privacy, or other significant disruption. Our information systems require an ongoing commitment of significant resources to maintain, protect and enhance existing systems and develop new systems to keep pace with continuing changes in information processing technology, evolving systems and regulatory standards, the increasing need to protect patient and customer information and changing customer patterns. In addition, third parties may attempt to hack into our products to obtain data relating to patients or disrupt performance of our products or to access our proprietary information.information and the technology from third party vendors that we rely upon may have defects or vulnerabilities which, in turn, create vulnerabilities or disruptions in our system. Any failure by us to maintain or protect our information technology systems, products and data integrity, including from cyber-attacks, intrusions or other breaches, could result in the unauthorized access to patient data and personally identifiable information, theft of intellectual property or other misappropriation of assets, or otherwise compromise our confidential or proprietary information and disrupt our operations. operations, or, in the worst case, could result in harm to patients. Such failure, or demonstration of vulnerability to such failure, may also result in additional regulatory scrutiny. We also grow our company through acquisitions and may face risks associated with defects and vulnerabilities in their systems as we work to integrate the acquisitions into our information technology system.

In the U.S., Federalfederal and Statestate privacy and security laws require certain of our operations to protect the confidentiality of personal information including patient medical records and other health information. In Europe, the Data Protection Directive requires us to manage individually identifiable information in the EU and, the new General Data Protection Regulation may impose fines of up to four percent of our global revenue in the event of violations.violations after implementation of the requirements on May 25, 2018. Internationally, some countries have also passed laws that require individually identifiable data on their citizens to be maintained on local servers and that may restrict transfer or processing of that data. We believe that we meet the expectations of applicable regulations and that the ongoing costs and impacts of ensuring compliance with such rules are not material to our business. However, there is no guarantee that we will avoid enforcement actions by governmental bodies. Enforcement actions cancould be costly and interrupt regular operations of our business.Any of these events, in turn, may cause us to lose existing customers, have difficulty preventing, detecting and controlling fraud, have disputes with customers, physicians and other health carehealthcare professionals, be subject to legal claims and liability, have regulatory sanctions or penalties imposed, have increases in operating expenses, incur expenses or lose revenues as a result of a data privacy breach or theft of intellectual property, or suffer other adverse consequences, any of which could have a material adverse effect on our business, financial condition or results of operations.
Pending and future intellectual property litigation could be costly and disruptive to us.
We operate in an industry that is susceptible to significant intellectual property litigation and, in recent years, it has been common for companies in the medical device field to aggressively challenge the patent rights of other companies. We are currently the subject of various patent litigation proceedings and other proceedings described in more detail under Note KJ – Commitments and Contingencies to our 2016 consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report. Intellectual property litigation is expensive, complex and lengthy and its outcome is difficult to predict. Adverse outcomes in one or more of these matters could have a material adverse effect on our ability to sell certain products and on our operating margins, financial condition, results of operation or liquidity. Pending or future patent litigation may result in significant royalty or other payments or injunctions that can prevent the sale of products and may significantly divert the attention of our technical and management personnel. In the event that our right to market any of our products is successfully challenged, we may be required to obtain a license on terms which may not be favorable to us, if at all. If we fail to obtain a required license or are unable to design around a patent, our business, financial condition or results of operations could be materially adversely affected.


Pending and future product liability claims and other litigation, including private securities litigation, stockholder derivative suits and contract litigation, may adversely affect our financial condition and results of operations or liquidity.

The design, manufacturing and marketing of medical devices of the types that we produce entail an inherent risk of product liability claims. Many of the medical devices that we manufacture and sell are designed to be implanted in the human body for long periods of time or indefinitely. A number of factors could result in an unsafe condition or injury to, or death of, a patient with respect to these or other products that we manufacture or sell, including physician technique and experience in performing the surgical procedure, component failures, manufacturing flaws, design defects, off-label use or inadequate disclosure of product-related risks or product-related information. These factors could result in product liability claims, a recall of one or more of our products or a safety alert relating to one or more of our products. Product liability claims may be brought by individuals or by groups seeking to represent a class.

We are currently the subject of product liability litigation proceedings and other proceedings described in more detail under Note KJ – Commitments and Contingencies to our 2016 consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report. The outcome of litigation, particularly class action lawsuits, is difficult to assess or quantify. Plaintiffs in these types of lawsuits often seek recovery of very large or indeterminate amounts, including not only actual damages, but also punitive damages. The magnitude of the potential losses relating to these lawsuits may remain unknown for substantial periods of time. In addition, the cost to defend against any future litigation may be significant. Product liability claims, securities and commercial litigation and other litigation in the future, regardless of the outcome, could have a material adverse effect on our financial condition, results of operations or liquidity. Additionally, we maintain an insurance policy providing limited coverage against securities claims and we are substantially self-insured with respect to product liability claims and fully self-insured with respect to intellectual property infringement claims. The fact that we do not maintain third-party insurance coverage for all categories of losses increases our exposure to unanticipated claims and adverse decisions and these losses could have a material adverse effect on our financial condition, results of operations or liquidity.
Any failure to meet regulatory quality standards applicable to our manufacturing and quality processes could have an adverse effect on our business, financial condition and results of operations.
As a medical device manufacturer, we are required to register our establishments and list our devices with the FDA and are subject to periodic inspection by the FDA for compliance with its Quality System Regulation requirements, which require manufacturers

of medical devices to adhere to certain regulations, including testing, quality control and documentation procedures. In addition, the Federal Medical Device Reporting regulations require us to provide information to the FDA whenever there is evidence that reasonably suggests that a device may have caused or contributed to a death or serious injury or, if a malfunction were to occur, could cause or contribute to a death or serious injury. Compliance with applicable regulatory requirements is subject to continual review and is monitored rigorously through periodic inspections by the FDA which may result in observations on Form 483 and in some cases warning letters that require corrective action. In the European Community, we are required to maintain certain International Standards Organization (ISO) certifications in order to sell our products and must undergo periodic inspections by notified bodies to obtain and maintain these certifications. Many other countries in which we do business have requirements similar to those of the USU.S. or the EU and other foreign governments or agencies may subject us to periodic inspections as well. If we, or our manufacturers, fail to adhere to quality system regulations or ISO requirements, this could delay production of our products and lead to fines, difficulties in obtaining regulatory clearances, recalls, enforcement actions, including injunctive relief or consent decrees, or other consequences, which could, in turn, have a material adverse effect on our financial condition or results of operations.
Interruption of our manufacturing operations could adversely affect our results of operations and financial condition.
Our products are designed and manufactured in technology centers around the world, either by us or third parties. In most cases, the manufacturing of our productsany specific product is concentrated in one or a few locations. Factors such as a failure to follow specific internal protocols and procedures, equipment malfunction, environmental factors or damage to one or more of our facilities could adversely affect our ability to manufacture our products. In the event of an interruption in manufacturing, we may be unable to quickly move to alternate means of producing affected products or to meet customer demand. In the event of a significant interruption, for example, as a result of a failure to follow regulatory protocols and procedures, we may experience lengthy delays in resuming production of affected products due primarily to needs for regulatory approvals. As a result, we may experience loss of market share, which we may be unable to recapture and harm to our reputation, which could adversely affect our results of operations and financial condition.
Disruptions in the supply of the materials and components used in manufacturing our products or the sterilization of our products by third-party vendors could adversely affect our results of operations and financial condition.

We purchase many of the materials and components used in manufacturing our products from third-party vendors. Certain of these materials and components are purchased from single sources due to quality considerations, expertise, costs or constraints resulting from regulatory requirements. In certain cases we may not be able to establish additional or replacement vendors for such materials or components in a timely or cost effective manner, largely as a result of FDA regulations that require validation of materials and components prior to their use in our products and the complex nature of our and many of our vendors' manufacturing processes. A reduction or interruption in the supply of materials and components used in manufacturing our products;products, an inability to timely develop and validate alternative sources if required;required or a significant increase in the price of such materials or components could adversely affect our results of operations and financial condition.
In addition, many of our products require sterilization prior to sale and we utilize a mix of internal resources and contract sterilizers to perform this service. To the extent we or our contract sterilizers are unable to sterilize our products, whether due to capacity, availability of materials for sterilization, regulatory or other constraints, we may be unable to transition to other contract sterilizer, sterilizer locations or sterilization methods in a timely or cost effective manner or at all, which could have an adverse impact on our results of operations and financial condition.

One of our contract sterilizers, Sterigenics U.S. LLC (Sterigenics), uses ethylene oxide to provide sterilization services for certain men’s health products within our Urology and Pelvic Health business. In October 2018, the DuPage County State's Attorney and Illinois Attorney General filed a lawsuit against Sterigenics over the emissions in connection with the use of ethylene oxide during sterilization at Sterigenics’ Willowbrook, Illinois plant. On February 15, 2019, the Illinois Environmental Protection Agency (EPA) took action to suspend operations at the Willowbrook facility. Sterigenics is challenging the action by the Illinois EPA. We are committed to ethical and sustainable business practices and have an expectation that our partners comply with all applicable regulations. We believe we currently have adequate inventory levels to sustain the disruption at the Willowbrook facility for the near term and are also pursuing various options to manage any impact to patients or our financial results, including accelerating our plans to move to existing sterilization facilities in our supply chain network. If we are unable to execute any of these options, there may be a material impact to our Urology and Pelvic Health business in the first half of 2019.
Our share price has been volatile and may fluctuate, and accordingly, the value of an investment in our common stock may also fluctuate.
Stock markets in general and our common stock in particular have experienced significant price and trading volume volatility over recent years. The market price and trading volume of our common stock may continue to be subject to significant fluctuations

due to factors described under this Item 1A entitled “Risk1A. Risk Factors, as well as economic and geopolitical conditions in general and also to variability in the prevailing sentiment regarding our operations or business prospects, as well as, among other things, changing investment priorities of our stockholders. Because the market price of our common stock fluctuates significantly, stockholders may not be able sell their shares at attractive prices.
 
If we are unable to attract or retain key personnel, it could have an adverse effect on our business, financial condition and results from operations.
 
In our industry, there is substantial competition for key personnel in the regions in which we operate and we may face increased competition for such employees, particularly in emerging markets as the trend toward globalization continues. Our business depends to a significant extent on the continued service of senior management and other key personnel, the development of additional management personnel and the hiring of new qualified employees. There can be no assurance that we will be successful in retaining and developing existing personnel or recruiting new personnel. The loss of one or more key employees, our ability to attract or develop additional qualified employees or any delay in hiring key personnel could have material adverse effects on our business, financial condition or results of operations.

ITEM 1B.  UNRESOLVED STAFF COMMENTS

None.

ITEM 2.  PROPERTIES
Our world headquarters is located in Marlborough, Massachusetts, with regional headquarters located in Singapore and Voisins-le-Bretonneux, France. As of December 31, 2016,2018, our principal manufacturing and technology centers were located in Minnesota, California and Indiana within the U.S.;, as well as internationally in Ireland, Costa Rica, Puerto Rico, Malaysia, Brazil and Puerto Rico.Switzerland. Our products are distributed worldwide from customer fulfillment centers in Massachusetts and the Netherlands. As of December 31, 2016,2018, we maintained 1316 principal manufacturing facilities, including seven in the U.S., three in Ireland, two in Costa Rica, and one in Puerto Rico, one in Malaysia, one in Brazil and one in Switzerland, as well as various distribution and technology centers around the world. Many of these facilities produce and manufacture products for more than one of our divisions and include research facilities. The following is a summary of our facilities as of December 31, 20162018 (in approximate square feet):
 Owned * Leased ** TotalOwned (1) Leased (2) Total
U.S. 4,256,000
 1,824,000
 6,080,000
4,043,000
 1,283,000
 5,326,000
International 1,522,000
 1,483,000
 3,005,000
2,269,000
 1,304,000
 3,573,000
 5,778,000
 3,307,000
 9,085,000
6,312,000
 2,587,000
 8,899,000
(1)Includes our principal manufacturing facilities in Minnesota, Ireland, Puerto Rico and one facility in Costa Rica, our manufacturing facility in Malaysia, our customer fulfillment centers in Massachusetts, the Netherlands and Japan, and our global headquarters location in Marlborough, Massachusetts.
(2)Includes our principal manufacturing facilities in California, Indiana, Brazil, Switzerland and one in Costa Rica, and our regional headquarters located in Singapore and Voisins-le-Bretonneux, France.

* Includes our principal manufacturing facilities in Minnesota, Ireland, Puerto Rico and one facility in Costa Rica; our customer fulfillment centers in Massachusetts, the Netherlands and Japan; and our global headquarters location in Marlborough, Massachusetts.
** Includes our principal manufacturing facilities in California, Indiana, and one facility in Costa Rica; and our regional headquarters located in Singapore and Voisins-le-Bretonneux, France.

We regularly evaluate the condition and capacity of our facilities to ensure they are suitable for the development, manufacturing, and marketing of our products, and provide adequate capacity for current and expected future needs. Further, our 2016 restructuring plan continues the implementation of our Plant Network Optimization (PNO) strategy, which is intended to simplify our manufacturing plant structure by transferring certain productions lines among facilities. Refer to Restructuring Initiatives within Results of Operations included in Item 7 of this Annual Report and Note H – Restructuring-related Activities to our 2016 consolidated financial statements included in Item 8 of this Annual Report.


ITEM 3. LEGAL PROCEEDINGS
See Note KJ – Commitments and Contingencies to our 2016 consolidated financial statements included in Item 8 of this Annual Report and incorporated herein by reference.

ITEM 4.  MINE SAFETY DISCLOSURES

None.Not Applicable.



PART II

ITEM 5.  MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

Our common stock is traded on the New York Stock Exchange (NYSE) under the symbol “BSX.” The following table provides the market range for the closing price
Holders of our common stock for each of the last eight quarters based on reported sales prices on the NYSE.Record
2016 High Low
First Quarter $18.82
 $16.07
Second Quarter 23.37
 18.94
Third Quarter 24.48
 23.11
Fourth Quarter 23.77
 20.09
     
2015    
First Quarter $18.07
 $13.22
Second Quarter 18.51
 17.18
Third Quarter 18.02
 15.78
Fourth Quarter 18.94
 16.42
Holders
The closing price of our common stock on January 31, 2017 was $24.06. As of January 31, 2017,2019, there were 9,5738,087 holders of record of our common stock.
Dividends
We did not pay a cash dividend in 20162018, 2017 or 2015,2016 and currently we do not intend to pay cash dividends. We may consider declaring and paying a cash dividend in the future; however, there can be no assurance that we will do so.
Securities Authorized for Issuance under Equity Compensation Plans
Please see Item 12. "Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters" under Part III of this Annual Report for information on where to find information required by Item 201(d) of Regulation S-K.
Purchases of Equity Securities by the Issuer and Affiliated Purchases
On January 25, 2013, our Board of Directors approved and on January 29, 2013, we announced a program authorizing the repurchase of up to $1.0$1.000 billion of our common stock. DuringIn 2014, we used $125 million of cash generated from operations to repurchase approximately 10 million shares of our common stock pursuant to our share repurchase authorizations discussedauthorizations. We made no share repurchases in 2018, 2017 or 2016. Refer to Note LK - Stockholders' Equity to our consolidated financial statements contained in Item 88. Financial Statements and Supplementary Data of this Annual Report. We made no share repurchases in 2016 or 2015.Report for additional information. As of December 31, 2016,2018, we had approximately $535 million remaining available under the 2013 share repurchase program.


Stock Performance Graph
The graph below compares the five-year total return to stockholders on our common stock with the return of the Standard & Poor’s (S&P) 500 Stock Index and the S&P Health Care Equipment Index. The graph assumes $100 was invested in our common stock and in each of the named indices on December 31, 2011,2013 and that allany dividends were reinvested.

totalreturngraph2018final.jpg
Note: The stock price performance shown on the graph above is not indicative of future price performance. This graph shall not be deemed "filed" for purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities of that section nor shall it be deemed incorporated by reference in any filing under the Securities Act or the Exchange Act, regardless of any general incorporation language in such filing.

ITEM 6.  SELECTED FINANCIAL DATA
FIVE-YEAR SELECTED FINANCIAL DATA
(in millions, except per share data)
Operating Data
Year Ended December 31, 2016 2015 2014 2013 20122018 2017 2016 2015 2014
Net sales $8,386
 $7,477
 $7,380
 $7,143
 $7,249
$9,823
 $9,048
 $8,386
 $7,477
 $7,380
Gross profit 5,962
 5,304
 5,170
 4,969
 4,900
7,011
 6,455
 5,962
 5,304
 5,170
Total operating expenses 5,515
 5,631
 5,471
 4,849
 8,768
5,504
 5,170
 5,515
 5,587
 5,471
Operating income (loss) 447
 (327) (301) 120
 (3,868)1,506
 1,285
 447
 (283) (301)
Income (loss) before income taxes 177
 (650) (509) (223) (4,107)1,422
 933
 177
 (650) (509)
Net income (loss) 347
 (239) (119) (121) (4,068)1,671
 104
 347
 (239) (119)
Net income (loss) per common share:                   
Basic $0.26
 $(0.18) $(0.09) $(0.09) $(2.89)$1.21
 $0.08
 $0.26
 $(0.18) $(0.09)
Assuming dilution $0.25
 $(0.18) $(0.09) $(0.09) $(2.89)$1.19
 $0.08
 $0.25
 $(0.18) $(0.09)
Balance Sheet Data
As of December 31, 2016 2015 2014 2013 20122018 2017 2016 2015 2014
Cash, cash equivalents and marketable securities $196
 $319
 $587
 $217
 $207
$146
 $188
 $196
 $319
 $587
Working capital (348) 1,041
 760
 1,187
 1,250
Working capital (deficit)(1,257) (1,832) (348) 1,041
 760
Total assets 18,096
 18,133
 17,024
 16,549
 17,136
20,999
 19,042
 18,096
 18,133
 17,024
Borrowings (short-term) 64
 3
 403
 3
 4
2,253
 1,801
 64
 3
 403
Borrowings (long-term) 5,420
 5,674
 3,841
 4,215
 4,234
4,803
 3,815
 5,420
 5,674
 3,841
Stockholders’ equity 6,733
 6,320
 6,457
 6,539
 6,870
8,726
 7,012
 6,733
 6,320
 6,457
Book value per common share* $4.94
 $4.69
 $4.86
 $4.95
 $5.07
Book value per common share ††$6.30
 $5.11
 $4.94
 $4.69
 $4.86
††Book value per common share is calculated using shares outstanding as of December 31, for each year, respectively shown.

*Book value per common share is calculated using shares outstanding as of December 31, for each year, respectively shown.

The data above include certain charges (credits) recorded in conjunction with goodwill and other intangible asset impairments, acquisitions, divestitures, restructuring and restructuring-related activities, debt extinguishment charges, amortization, pension termination charges, discrete tax items and/or litigation. The data above should be read in conjunction with our consolidated financial statements, including the notes thereto, included in Item 88. Financial Statements and Supplementary Data of thisour Annual Report as well as prior yearon Form 10-K filings.

10-K.

ITEM 7.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
The following discussion and analysis provides information management believes to be relevant to understanding the financial condition and results of operations of Boston Scientific Corporation and its subsidiaries. For a full understanding of our financial condition and results of operations, you should read this discussion alongshould be read in conjunction with our consolidated financial statements and accompanying notes included in Item 88. Financial Statements and Supplementary Data of this Annual Report.
Executive Summary
Financial Highlights and Trends

In 2016,2018, we generated net sales of $8.386$9.823 billion, as compared to $7.477$9.048 billion in 2015, an2017. This increase of $909$775 million, or 12 percent. Our net sales were unfavorably impacted by $99 million8.6 percent, included operational growth of 8.0 percent and the positive impact of 60 basis points from foreign currency fluctuations in 2016, as compared to 2015. Excluding the impact of foreign currency exchange rates, ourfluctuations. Operational net sales increased $1.008 billion, or 12 percent, as comparedincluded approximately $78 million in 2018 due to the prior year.1 This increase included net salesacquisitions of approximately $236 millionSymetis SA (Symetis) in 2016,the second quarter of 2017, NxThera, Inc. (NxThera) in the second quarter of 2018, Claret Medical, Inc. (Claret) in the third quarter of 2018 and Augmenix, Inc. (Augmenix) in the fourth quarter of 2018, each with no prior year period related net sales, due to the AMS Portfolio Acquisition and the EndoChoice Holdings, Inc. (EndoChoice) acquisition.sales.1 Refer to the Business and Market Overview section for further discussion of our net sales by global business.

Our reported net income in 20162018 was $347 million,$1.671 billion, or $0.25$1.19 per diluted share. Our reported results for 20162018 included intangible asset impairmentcertain charges acquisition-related net charges, restructuring and restructuring-related net charges, litigation-related charges, and amortization expenseand/or credits totaling $1.187 billion$389 million (after-tax), or $0.86$0.28 per diluted share. Excluding these items, adjusted net income for 20162018 was $1.534$2.060 billion, or $1.11$1.47 per diluted share.1

Our reported net lossincome in 20152017 was $239$104 million, or $0.18$0.08 per diluted share. Our reported results for 20152017 included intangible asset impairmentcertain charges acquisition-related net charges, restructuring and restructuring-related net charges, litigation-related charges, pension termination charges, debt extinguishment charges, discrete tax items, and amortization expenseand/or credits totaling $1.506$1.647 billion (after-tax), or $1.11$1.18 per diluted share. Excluding these items, adjusted net income for 20152017 was $1.267$1.752 billion, or $0.93$1.26 per sharediluted share.1.















1 AdjustedOperational net sales growth rates, which exclude the impact of changes in foreign currency exchange rates,fluctuations and adjusted net income and adjusted net income per share, which exclude certain items required by generally accepted accounting principles in the United States (U.S(U.S. GAAP), are not prepared in accordance with U.S. GAAP.GAAP and should not be considered in isolation from, or as a replacement for, the most directly comparable GAAP measure. Refer to Additional Information for a discussion of management’s use of these non-GAAP financial measures.

The following is a reconciliation of our results of operations prepared in accordance with U.S. GAAP to those adjusted results considered by management. Refer to Results of Operations for a discussion of each reconciling item:
 Year Ended December 31, 2016 Year Ended December 31, 2018
   Tax   Impact per 
in millions, except per share data Pre-Tax Impact After-Tax share 
(in millions, except per share data)Net Income (Loss) Impact per Share
GAAP net income (loss) $177
 $170
 $347
 $0.25
 $1,671
 $1.19
Non-GAAP adjustments:            
Amortization expense520
 0.37
Intangible asset impairment charges 11
 (1) 10
 0.01

31
 0.02
Acquisition-related net charges 136
 (10) 126
 0.09

Restructuring and restructuring-related net charges 78
 (17) 61
 0.04

Litigation-related net charges 804
 (292) 512
 0.37

Amortization expense 545
 (67) 478
 0.35

Acquisition-related net charges (credits)5
 0.00
Restructuring and restructuring-related net charges (credits)77
 0.05
Litigation-related net charges (credits)79
 0.06
Investment impairment charges6
 0.00
Discrete tax items(328) (0.23)
Adjusted net income $1,751
 $(217) $1,534
 $1.11
 $2,060
 $1.47

 Year Ended December 31, 2015 Year Ended December 31, 2017
   Tax   Impact per 
in millions, except per share data Pre-Tax Impact After-Tax share 
(in millions, except per share data)Net Income (Loss) Impact per Share
GAAP net income (loss) $(650) $411
 $(239) $(0.18) $104
 $0.08
Non-GAAP adjustments:            
Amortization expense492
 0.35
Intangible asset impairment charges 19
 (3) 16
 0.01
*4
 0.00
Acquisition-related net charges 255
 (33) 222
 0.17
*
Restructuring and restructuring-related net charges 83
 (14) 69
 0.05
*
Litigation-related net charges 1,105
 (400) 705
 0.52
*
Pension termination charges 44
 (16) 28
 0.02
*
Debt extinguishment charges 45
 (16) 29
 0.02
*
Acquisition-related net charges (credits)9
 0.01
Restructuring and restructuring-related net charges (credits)75
 0.05
Litigation-related net charges (credits)172
 0.12
Investment impairment charges36
 0.03
Discrete tax items 
 (9) (9) (0.01)*861
 0.62
Amortization expense 495
 (49) 446
 0.33
*
Adjusted net income $1,396
 $(129) $1,267
 $0.93
 $1,752
 $1.26

*Assumes dilution of 21.5 million shares for 2015 for all or a portion of these non-GAAP adjustments.

Cash provided by operating activities was $972$310 million in 2016, as compared to cash provided by operating activities of $600 million in 2015. This increase in cash provided by operating activities was primarily driven by the increase in net income for 2016 compared to 2015. Our cash generated from operations continues to be a significant source of funds for investing in our growth, including acquisitions and strategic alliances, managing our contingencies and reducing our debt levels.

2018. As of December 31, 2016,2018, we had total debt of $5.484$7.056 billion, cashCash and cash equivalents of $196$146 million and a working capital deficit of $348 million. We hold investment-grade ratings with all three major credit-rating agencies. We believe our investment grade credit profile reflects the size and diversity of our product portfolio, our leading share position in several of our served markets, our strong cash flow, our solid financial fundamentals and our financial strategy.

$1.257 billion. Refer to Liquidity and Capital Resources for further discussion.information.

Business and Market Overview

The following section describes an overview of our product offerings and results of operations by business unit. For additional information on our businesses and their product offerings, see Item 1. Business of this Annual Report.

Effective January 1, 2018, following organizational changes to align the structure of our business with our focus on active implantable devices, we revised our reportable segments, in accordance with FASB ASC Topic 280, Segment Reporting. The revision reflects a reclassification of our Neuromodulation business from our MedSurg segment to our newly created Rhythm and Neuro segment. We have revised prior year amounts to conform to the current year’s presentation (as denoted with an asterisk (*) throughout). There was no revision to operating segments or reporting units as a result of the organizational change. Refer to Note A – Significant Accounting Policies to our consolidated financial statements in Item 8. Financial Statements and Supplementary Data of this Annual Report for additional information.

MedSurg

Endoscopy

Our Endoscopy business develops and manufactures devices to diagnose and treat a broad range of gastrointestinal (GI) and pulmonary conditions with innovative, less invasive technologies.

Our net sales of Endoscopy products of $1.762 billion represented approximately 18 percent of our consolidated net sales in 2018. Our Endoscopy net sales increased $143 million, or 8.8 percent, in 2018, as compared to 2017. This increase included operational net sales growth of 8.3 percent and the positive impact of 50 basis points from foreign currency fluctuations, as compared to 2017. This year-over-year increase was primarily driven by growth in our hemostasis franchise featuring our Resolution 360™ Clip, our biliary franchise with both our SpyGlass™ DS Direct Visualization System and AXIOS™ Stent and Electrocautery Enhanced Delivery System and our infection prevention products and pathology services.

Urology and Pelvic Health

Our Urology and Pelvic Health business develops and manufactures devices to treat various urological and pelvic conditions for both male and female anatomies.

Our net sales of Urology and Pelvic Health products of $1.245 billion represented approximately 13 percent of our consolidated net sales in 2018. Urology and Pelvic Health net sales increased $122 million, or 10.8 percent, in 2018, as compared to 2017. This increase included operational net sales growth of 10.6 percent and the positive impact of 20 basis points from foreign currency fluctuations, as compared to 2017. This year-over-year increase was primarily attributable to growth in sales of our stone franchise, including our LithoVue™ Digital Flexible Ureteroscope, our men's health products and our benign prostatic hyperplasia (BPH) product family, including the Rezūm™ System purchased as part of our NxThera acquisition and the SpaceOAR™ Hydrogel System purchased as part of our Augmenix acquisition.

Rhythm and Neuro

Cardiac Rhythm Management

Our Cardiac Rhythm Management (CRM) business develops and manufactures a variety of implantable devices that monitor the heart and deliver electricity to treat cardiac abnormalities.

Our net sales of CRM products of $1.951 billion represented approximately 20 percent of our consolidated net sales in 2018. Our net sales of CRM products increased $56 million, or 2.9 percent, in 2018, as compared to 2017. This increase included operational net sales growth of 2.1 percent and the positive impact of 80 basis points from foreign currency fluctuations, as compared to 2017. This year-over-year increase was driven by the global strength of our implantable cardioverter defibrillator (ICD), our implantable cardiac resynchronization therapy defibrillator (CRT-D) and our subcutaneous implantable cardiac defibrillator (S-ICD) products. Our current generation of ICD and CRT-D products were both favorably impacted by our U.S. magnetic resonance imaging (MRI) safe conditional labeling, which was approved by the FDA in September 2017 and launched in the fourth quarter of 2017. Our defibrillator growth was also driven by a combination of the ongoing global commercialization of our RESONATE™ family of ICD and CRT-D devices which includes our HeartLogic™ Heart Failure (HF) Diagnostic and the increasing market penetration of our S-ICDs. This year-over-year defibrillator growth was partially offset by declines in our pacemaker portfolio due to market share loss as a result of competitive product entrance.


Electrophysiology

Our Electrophysiology business develops and manufactures less-invasive medical technologies used in the diagnosis and treatment of rate and rhythm disorders of the heart.

Our net sales of Electrophysiology products of $311 million represented approximately three percent of our consolidated net sales in 2018. Our Electrophysiology net sales increased $33 million, or 12.1 percent, in 2018, as compared to 2017. This increase included operational net sales growth of 10.9 percent and the positive impact of 120 basis points from foreign currency fluctuations, as compared to 2017. This year-over-year increase was primarily driven by global expansion of our Rhythmia™ Mapping System products and capital equipment offerings, our expanded portfolio of navigation enabled open-irrigated catheters, including the Blazer IntellaNav MiFi™ Open-Irrigated catheter, and advanced diagnostic catheters, including the IntellaMap Orion™ Mapping Catheter.

Neuromodulation

Our Neuromodulation business develops and manufactures devices to treat various neurological movement disorders and manage chronic pain.

Our net sales of Neuromodulation products of $779 million represented eight percent of our consolidated net sales in 2018. Neuromodulation net sales increased $144 million, or 22.7 percent, in 2018, as compared to 2017. This increase included operational net sales growth of 22.5 percent and the positive impact of 20 basis points from foreign currency fluctuations, as compared to 2017. This year-over-year increase was primarily driven by the successful launch of Spectra WaveWriter™ Spinal Cord Stimulator (SCS) Systems in the U.S. and the continued strong sales growth in our Vercise™ Deep Brain Stimulation (DBS) Systems.

Cardiovascular

Interventional Cardiology

Our Interventional Cardiology divisionbusiness develops and manufactures technologies for diagnosing and treating coronary artery disease and other cardiovascular disorders including structural heart conditions. Product offerings include coronary stents, including drug-eluting and bare metal stent systems, balloon catheters, rotational atherectomy systems, guide wires, guide catheters, embolic protection devices, crossing and re-entry devices for the treatment of chronically occluded coronary vessels, diagnostic catheters, and intravascular ultrasound (IVUS) imaging systems. Our structural heart product offerings include a device for transcatheter aortic valve replacement and a device designed to close the left atrial appendage in patients with atrial fibrillation that are at risk for ischemic stroke.

Our worldwide net sales of Interventional Cardiology products were $2.281of $2.590 billion for 2016, orrepresented approximately 2726 percent of our consolidated net sales for the year.in 2018. Our worldwide net sales of Interventional Cardiology products increased $248 million, or 12 percent, in 2016, as compared to 2015. Excluding the impact of changes in foreign currency exchange rates, which had a $34 million negative impact on our Interventional Cardiology net sales increased $171 million, or 7.1 percent, in 2016,2018, as compared to 2015,2017. This increase included operational net sales growth of these products increased $282 million, or 13 percent.6.6 percent and the positive impact of 50 basis points from foreign currency fluctuations, as compared to 2017. This year-over-year increase was primarily related to our structural heart therapies, including sales of our WATCHMAN™ Left Atrial Appendage Closure (LAAC) Device, our ACURATE™ Transcatheter Aortic Valve Replacement (TAVR) platform purchased as part of our Symetis acquisition, our Sentinel™ Cerebral Embolic Protection System purchased as part of our Claret acquisition and our complex percutaneous coronary interventions (PCI) product offerings, partially offset by a decline in sales of our drug-eluting stents, led by our ongoing global launch of the SYNERGY™ Stent, our WATCHMAN™ Device following the U.S. commercial launch during the first quarter of 2015 and our Lotus™ Valve System in the EU, along with operational growth in our PCI Guidance Systemcoronary stent product offerings.

Worldwide sales from our drug-eluting coronary stents were $1.199 billion during 2016, as compared to $1.074 billion during 2015, representing a significant portion of our Interventional Cardiology net sales. Our drug-eluting stent systems include our next generation SYNERGY Everolimus-Eluting Platinum Chromium Coronary Stent System and our Promus PREMIER™ Everolimus-Eluting Platinum Chromium Coronary Stent System, both of which are designed to provide physicians with improved drug-eluting stent performance in treating patients with coronary artery disease. SYNERGY features an ultra-thin abluminal (outer) bioabsorbable polymer coating, while Promus PREMIER™ features a unique customized platinum chromium alloy stent architecture and an enhanced stent delivery system. We received FDA approval of the SYNERGY™ Stent technology and Japanese regulatory approval in the fourth quarter of 2015.

Our structural heart product offerings include our Lotus™ Valve System, a device for transcatheter aortic valve replacement, and our WATCHMAN™device designed to close the left atrial appendage in patients with non-valvular atrial fibrillation who are at risk for ischemic stroke. The Lotus Valve System consists of a stent-mounted tissue valve prosthesis and catheter delivery system for guidance and placement of the valve.

The original Lotus Valve System as well as our next generation Lotus EDGE™ System are CE-marked in the European Union (EU), and in the U.S. they are investigational devices and not commercially available. In October 2016, we suspended our limited launch and initiated a voluntary removal of field inventory of the Lotus EDGE™ system due to reports that, in some cases, the device could not be fully locked during the procedure due to premature release of a pin connecting the Lotus EDGE™ Valve to the delivery system. In February 2017, we initiated a voluntary removal of all Lotus™ Valve devices, including Lotus with Depth Guard™, from global commercial and clinical sites due to reports of premature release of a pin connecting the Lotus™ Valve to the delivery system. As with the prior announced suspension of our Lotus Edge™ Valve System device, we believe that the issue is caused by excess tension in the pin mechanism introduced during the manufacturing process. We expect to bring the Lotus™ Valve platform back to market in Europe and other regions in the fourth quarter of 2017. We anticipate filing the U.S. PMA submission for the Lotus Edge™ Valve System, the next generation platform, in the fourth quarter of 2017, with a U.S. launch planned for mid-2018.
The WATCHMAN Left Atrial Appendage Closure Technology (WATCHMAN) is the first device studied in a randomized clinical trial to offer an alternative to warfarin, and is marketed in CE-mark countries and other international countries, as well as the U.S. following FDA approval in March 2015. We believe that Watchman will be the only LAAC technology commercially available in the U.S. for multiple years. In November 2015, we received CE Mark for our next generation device, Watchman FLX™. Shortly after approval, we began a European initial market release of Watchman FLX. The initial market release was suspended near the end of the first quarter of 2016 due to a higher than expected rate of device embolization. Following an extensive data evaluation, we have decided to pursue potential design enhancements prior to returning a next generation device to market.

On December 12, 2016, we completed the acquisition of certain manufacturing assets and capabilities of the Neovasc, Inc. (Neovasc) advanced biological tissue business and made a 15 percent equity investment in Neovasc for a total upfront cash payment of $75

million. With this acquisition, we will integrate certain manufacturing assets and biologic tissue capabilities into our structural heart business for use in the manufacturing of the Lotus Valve System and future heart valve technologies within our Interventional Cardiology business. We expect this integration to be substantially completed by the end of 2018.

Peripheral Interventions

Our Peripheral Interventions (PI) product offerings include stents, balloon catheters, wires, peripheral embolization devicesbusiness develops and other devices usedmanufactures products to diagnose and treat peripheral arterial diseases, including a broad line of medical devices used in percutaneous transluminal angioplasty (PTA) and peripheral vascular disease, along withdiseases, as well as products to diagnose, treat diagnose and ease various forms of cancer.

Our worldwide net sales of PIPeripheral Interventions products were $1.011of $1.187 billion for 2016, orrepresented approximately 12 percent of our consolidated net sales for the year.in 2018. Our worldwidePeripheral Interventions net sales of PI products increased $107$106 million, or 129.8 percent, in 2016,2018, as compared to 2015. Excluding2017. This increase included operational net sales growth of 9.2 percent and the positive impact of 60 basis points from changes in foreign currency exchange rates, which had an $11 million negative impact on our worldwide PI net sales in 2016,fluctuations, as compared to 2015, net sales of these products increased $118 million, or 12 percent. This year-over-year increase was primarily driven by revenues from our Atherectomy and Thrombectomy systems, as well as growth in our core PI franchises, particularly our stent franchise following FDA approval and launch of our Innova™ Vascular self-expanding stent system in the U.S. and Japan, our interventional oncology franchise and our drug-eluting product franchise.

On December 31, 2015, we completed the acquisition of the interventional radiology business of CeloNova Biosciences (CeloNova). The acquisition includes drug-eluting microspheres designed to be loaded with chemotherapy drugs for delivery to cancerous tumors, and spherical embolic products used to treat uterine fibroids and other conditions. We are in the process of integrating CeloNova into our Peripheral Interventions business and expect to be substantially complete by the second half of 2017.
Rhythm Management
Cardiac Rhythm Management

Our Cardiac Rhythm Management (CRM) business develops, manufactures and markets a variety of implantable devices including implantable cardioverter defibrillator (ICD) systems and implantable cardiac resynchronization therapy defibrillators, including the world's first and only commercially available subcutaneous implantable cardioverter defibrillator, the S-ICD System, and pacemaker systems that monitor the heart and deliver electricity to treat cardiac abnormalities. In addition, in most geographies, we monitor device performance remotely, allowing for more frequent monitoring in order to guide treatment decisions.

Our worldwide net sales of CRM products were $1.850 billion for 2016, or approximately 22 percent of our consolidated net sales for the year. Our worldwide net sales of CRM products increased $43 million, or two percent, in 2016, as compared to 2015. Excluding the impact of changes in foreign currency exchange rates, which had a $17 million negative impact on our CRM net sales in 2016, as compared to 2015, net sales of these products increased $60 million, or three percent. This year-over-year increase was primarily driven by strong global pacemakerperformance in each region, particularly in Asia Pacific and U.S., and growth in our interventional oncology product solutions, drug-eluting technologies, including the U.S. launch of the ACCOLADE™ family of magnetic resonance imaging (MRI) safe pacemakersRanger™ Drug-Coated Balloon and the Ingevity™ MRI pacing lead in the U.S., global growth from our quadripolar cardiac resynchronization therapy pacemakers (CRT-P), global S-ICD sales growth and benefits from our sales collaboration agreement with Preventice Solutions, Inc., (Preventice). In the U.S., the fourth quarter of 2016 represented our second full quarter of U.S. MRI pacemaker commercialization, the third quarter of commercialization for our Acuity™ X4 Quadripolar LV Pacing Lead in both the cardiac resynchronization therapy defibrillator (CRT-D) and CRT-P franchises, and global commercialization of our EMBLEM™ MRI S-ICD system. These combined launches more than offset lower volumes of replacement procedures for our defibrillators due to their extended longevity and pressure from competitor high voltage MRI technologies primarily in the U.S. On April 30, 2015, we acquired a 27 percent ownership interest in Preventice, which includes 18.5 percent of Preventice's common stock. Preventice is a privately-held company headquartered in Minneapolis, MN, and a leading developer of mobile health solutions and services. In addition to the equity agreement, we entered into a commercial agreement with Preventice, under which we became Preventice’s exclusive, worldwide sales and marketing representative. In October 2016, we notified Preventice of our intent to terminate the commercial agreement and will transition the sales force back to Preventice in 2017 under the terms of the agreement.

The following are the components of our CRM net sales:
  Year Ended
(in millions) December 31, 2016 December 31, 2015
Defibrillator systems $1,274
 $1,313
Pacemaker systems 576
 494
CRM products $1,850
 $1,807
Electrophysiology

Our Electrophysiology business develops less-invasive medical technologies used in the diagnosis and treatment of rate and rhythm disorders of the heart. Our leading products include the Blazer™ line of ablation catheters, designed to deliver enhanced performance and responsiveness, and the Rhythmia™ Mapping System, a next-generation, catheter-based, 3-D cardiac mapping and navigation solution designed to help diagnose and treat a variety of arrhythmias.

Our worldwide net sales of Electrophysiology products were $243 million for 2016, or approximately three percent of our consolidated net sales for the year. Our worldwide net sales of Electrophysiology products increased $10 million, or four percent, in 2016, as compared to 2015. Excluding the impact from changes in foreign currency exchange rates, which had a $3 million negative impact on our Electrophysiology net sales in 2016, as compared to 2015, net sales of these products increased $13 million, or five percent. This year-over-year increase was primarily driven by increased sales of our Rhythmia MappingEluvia™ Drug Eluting Vascular Stent System and related products. In the first quarter of 2016, we initiated a full European launch of our Blazer IntellaNav™ OI Catheter which is used with our Rhythmia Mapping System and, in July of 2016, we received FDA approval for this same catheter. In the second quarter of 2016, we received FDA approval for IntellaNav™ XP and the IntellaNav MiFi™ XP Navigation-Enabled Ablation Catheters that are used with the Rhythmia Mapping System. We also received FDA approval for our Blazer™ Open Irrigated System with Atrial Flutter indication and began full U.S. commercialization in the second quarter of 2016. Our global roll-out of our Rhythmia Mapping System, including early Europe commercialization of our next generation Rhythmia™ HDx System late in the fourth quarter, along with continued global expansion of our new navigation enabled therapeutic catheter portfolio, will continue as we expand our global Rhythmia installed base.
MedSurg
Endoscopy

Our Endoscopy division develops and manufactures devicescore technologies to treat a variety of medical conditions including diseases of the digestive and pulmonary systems. Our worldwide net sales of Endoscopy products were $1.440 billion for 2016, or approximately 17 percent of our consolidated net sales for the year. Our worldwide net sales of Endoscopy products increased $134 million, or 10 percent, in 2016, as compared to 2015. Excluding the impact from changes in foreign currency exchange rates, which had a negative $9 million impact on our Endoscopy net sales in 2016 as compared to 2015, net sales of these products increased $143 million, or 10 percent. This year-over-year increase was primarily driven by growth across several of our key product franchises, including our biliary device franchise with our SpyGlass™ DS Direct Visualization System and our AXIOS Stent and Electrocautery-Enhanced Delivery System for endoscopic ultrasound-guided transmural drainage of pancreatic pseudocysts; our metal stent franchise driven by our Biliary WallFlex® product family; and our hemostasis franchise, featuring our Resolution™ and Resolution 360™ Clips. This increase also includes revenue of approximately $10 million with no prior year period related net sales, due to the EndoChoice acquisition in November 2016, as described below.
On November 22, 2016, we completed our acquisition of EndoChoice. EndoChoice is an Alpharetta, Georgia based company focused on the development and commercialization of infection control products, pathology services and single-use devices for specialists treating a wide range of gastrointestinal (GI) conditions. We began the process of integrating EndoChoice into our Endoscopy business in the fourth quarter of 2016 and expect to be substantially complete by the end of 2017.

On November 1, 2016, we acquired the LumenR™ Tissue Retractor System from LumenR LLC (LumenR), a privately held Newark, California based company. The LumenR™ Tissue Retractor System is currently in development for use during endoscopic resection of lesions in the colon, esophagus or stomach.

On April 2, 2015, we acquired Xlumena, Inc. (Xlumena), a medical device company that developed minimally invasive devices for Endoscopic Ultrasound (EUS) guided transluminal drainage of targeted areas within the gastrointestinal tract. In 2016, we completed the integration of Xlumena into our Endoscopy business.vascular diseases.

Urology and Pelvic Health

Our Urology and Pelvic Health division develops and manufactures devices to treat various urological and pelvic conditions, such as kidney stones, benign prostatic hyperplasia (BPH), erectile dysfunction, male incontinence, pelvic floor disorders, abnormal uterine bleeding, and uterine fibroids and polyps. Our worldwide net sales of Urology and Pelvic Health products were $1.005 billion for 2016, or approximately 12 percent of our consolidated net sales for the year. Our worldwide net sales of Urology and Pelvic Health products increased $312 million, or 45 percent, in 2016, as compared to 2015. Excluding the impact from changes in foreign currency exchange rates, which had a negative $18 million impact on our Urology and Pelvic Health net sales in 2016, as compared to 2015, net sales of these products increased $330 million, or 45 percent. This year-over-year increase was primarily attributable to revenue of approximately $226 million with no prior year period related net sales, due to the AMS Portfolio Acquisition in August 2015, along with growth across all of our other global franchises, including our Pelvic Floor franchise as a result of market share gains primarily driven by a competitor exiting the market during the first quarter of 2016.
On November 15, 2016, we completed the acquisition of the gynecology and urology portfolio of Distal Access, LLC (Distal), a Salt Lake City based company that designs minimally invasive medical devices. The portfolio includes the Resectr™ Tissue Resection Device, a single-use solution designed to remove uterine polyps. We began the process of integrating the Resectr device into our Urology and Pelvic Health business during the fourth quarter of 2016 and expect to be substantially complete by the end of 2017.

On August 3, 2015, we completed the acquisition of the American Medical Systems male urology portfolio (AMS Portfolio Acquisition), which includes the men's health and prostate health businesses, from Endo International plc. The AMS male urology portfolio was integrated with our formerly named Urology and Women's Health business, and the joint businesses became Urology and Pelvic Health. The integration was substantially complete by the end of 2016.
Neuromodulation

Our Neuromodulation business offers the Precision™, Precision Spectra™, Precision Montage™ and Precision Novi™ Spinal Cord Stimulator (SCS) Systems, used for the management of chronic pain, and our Vercise™ Deep Brain Stimulation (DBS) System in various international regions such as Europe, Latin America and Asia Pacific for the treatment of Parkinson's disease, tremor and intractable primary and secondary dystonia, a neurological movement disorder characterized by involuntary muscle contractions. Our worldwide net sales of Neuromodulation products were $556 million for the year ended December 31, 2016, or approximately seven percent of our consolidated net sales for the year ended December 31, 2016. Our worldwide net sales of Neuromodulation products increased $55 million, or 11 percent, in 2016, as compared to 2015. Excluding the impact from changes in foreign currency exchange rates, which had a negative $7 million impact on our Neuromodulation net sales in 2016, as compared to 2015, net sales of these products increased $62 million, or 12 percent. The year-over-year increase was primarily driven by share gains from our Montage™ System, continued adoption of the Precision Spectra™ SCS System in the U.S. and increased net sales in Europe, driven by our Vercise™ DBS Systems and non-rechargeable Precision Novi™ SCS System.

On July 27, 2016, we acquired Cosman Medical, Inc. (Cosman), a privately held manufacturer of radiofrequency ablation systems, expanding our Neuromodulation portfolio and offering physicians treating patients with chronic pain a wider choice of non-opioid therapeutic options. We are in the process of integrating Cosman into our Neuromodulation business, and expect the integration to be substantially complete by the end of 2017.

Emerging Markets

As part of our strategic imperatives to drive global expansion, described in Item 11. Business of this Annual Report, we are seeking to grow net sales and market share by expanding our global presence, including in Emerging Markets. We define Emerging Markets as including 20 countries that we believe have strong growth potential based on their economic conditions, healthcare sectors and our global capabilities. We are seeking to expand our presence and strengthen relationships in order to grow net sales and market share within our Emerging Markets, and we have increased our investment in infrastructure in these countries in order to maximize opportunities. Our Emerging Markets revenue grew nine percent, as compared to the prior year, and was approximately 10net sales represented 11 percent of our consolidated net sales in 2016. Excluding2018 and 10 percent in 2017. In 2018, our Emerging Markets net sales grew 18.0 percent on a reported basis including operational net sales growth of 21.4 percent and the impact from changes in foreign currency exchange rates, which had a negative impact of 11 percent, net sales in these markets grew 20 percent.340 basis points from foreign currency fluctuations, as compared to 2017.

Results of Operations
Net Sales
We manage our global businesses on a constant currency basis, and we manage market risk from currency exchange rate changes at the corporate level. Management excludes the impact of changes in foreign currency exchange rates for purposes of reviewing revenue growth rates to facilitate an evaluation of current operating performance and comparison to past operating performance. To calculate revenue growth rates that exclude the impact of changes in foreign currency exchange rates, we convert current period and prior period net sales from local currency to U.S. dollars using standard internal currency exchange rates held constant for each year.
The following table provides our net sales by global business and the relative change in growth on an asa reported and constant currency basis. The constant currency growth rates in the tables below can be recalculated from our net sales presented in Note O - Segment Reporting to our consolidated financial statements contained in Item 8 of this Annual Report. Net sales that exclude the impact of changes in foreign currency exchange rates and net sales from divested businesses are not financial measures prepared in accordance with U.S. GAAP and should not be considered in isolation from, or as a replacement for, the most directly comparable GAAP financial measure. Refer to Additional Information of this Item 7 for a further discussion of management’s use of this non-GAAP financial measure.basis:
    2016 versus 2015 2015 versus 2014
Year Ended
December 31,
 As Reported
Currency
Basis
Constant
Currency
Basis
 As Reported
Currency
Basis
Constant
Currency
Basis
Year Ended December 31, 2018 versus 2017 2017 versus 2016
(in millions)201620152014 2018 2017 2016 
       
Endoscopy$1,762
 $1,619
 $1,440
 8.8% 12.4%
Urology and Pelvic Health1,245
 1,124
 1,005
 10.8% 11.8%
MedSurg*3,007
 2,742
 2,445
 9.7% 12.2%
Cardiac Rhythm Management1,951
 1,895
 1,850
 2.9% 2.5%
Electrophysiology311
 278
 243
 12.1% 14.5%
Neuromodulation779
 635
 556
 22.7% 14.2%
Rhythm and Neuro*3,041
 2,808
 2,649
 8.3% 6.0%
Interventional Cardiology$2,281
$2,033
$2,057
 12%13% (1)%7%2,590
 2,419
 2,281
 7.1% 6.1%
Peripheral Interventions1,011
904
850
 12%12% 6 %13%1,187
 1,081
 1,011
 9.8% 6.8%
Cardiovascular3,292
2,937
2,907
 12%12% 1 %9%3,777
 3,500
 3,292
 7.9% 6.3%
     
Cardiac Rhythm Management1,850
1,807
1,912
 2%3% (5)%1%
Electrophysiology243
233
227
 4%5% 2 %9%
Rhythm Management2,093
2,040
2,139
 3%3% (5)%1%
     
Endoscopy1,440
1,306
1,323
 10%10% (1)%6%
Urology and Pelvic Health1,005
693
535
 45%45% 30 %36%
Neuromodulation556
501
472
 11%12% 6 %8%
MedSurg3,001
2,500
2,330
 20%20% 7 %13%
     
Subtotal Core Businesses8,386
7,477
7,376
 12%12% 1 %8%
Divested Businesses

4
 N/A
N/A
 N/A
N/A
Net Sales$8,386
$7,477
$7,380
 12%12% 1 %8%$9,823
 $9,048
 $8,386
 8.6% 7.9%

Refer to Executive Summary for further discussion of our net sales and a comparison of our 20162018 and 20152017 net sales.

In 2015,2017, we generated net sales of $7.477$9.048 billion, as compared to $7.380$8.386 billion in 2014, an2016. This increase of $97$662 million, or one percent. Our7.9 percent, included operational net sales were unfavorably impacted by $505 milliongrowth of 7.8 percent and a positive impact of 10 basis points from foreign currency fluctuations, in 2015 as compared to 2014. Excluding the impact of foreign currency and sales from divested businesses, our net sales increased $606 million, or eight percent, as compared to the prior year.2016. This increase was primarily due primarily to constant currency increases in net sales from our Endoscopy business of $179 million, which included sales from our acquisition of EndoChoice Holdings, Inc. (EndoChoice) during the fourth quarter of 2016, from our Interventional Cardiology business of $138 million, primarily due to increased sales from our WATCHMAN™ LAAC Technology and from our acquisition of Symetis SA (Symetis) during the second quarter of 2017, and from our Urology and Pelvic Health business of $193 million, primarily due to the AMS Portfolio Acquisition; from our Interventional Cardiology business of $150 million; from our Peripheral Interventions business of $114 million; and from our Endoscopy business of $79$119 million.

Gross Profit
Our gross profit was $7.011 billion in 2018, $6.455 billion in 2017 and $5.962 billion in 2016, $5.304 billion in 2015, and $5.170 billion in 2014.2016. As a percentage of net sales, our gross profit increased to 71.4 percent in 2018, as compared to 71.3 percent in 2017 and 71.1 percent in 2016, as compared to 70.9 percent in 2015 and 70.1 percent in 2014.2016. The following is a reconciliation of our gross profit margins and a description of the drivers of the change from period to period:
 Year Ended
December 31,
 20162015
Gross profit - prior year70.9 %70.1 %
Manufacturing cost reductions2.0 %1.8 %
Sales pricing and mix(0.1)%(0.6)%
Inventory step-up due to acquisition accounting(0.2)%(0.4)%
Net impact of foreign currency(0.9)%0.5 %
All other, including other inventory charges and other period expense(0.6)%(0.5)%
Gross profit - current year71.1 %70.9 %
Gross Profit Margin
Year Ended December 31, 201671.1%
Manufacturing cost reductions1.9%
Sales pricing and mix0.1%
Inventory step-up due to acquisition accounting(0.2)%
Net impact of foreign currency fluctuations(1.3)%
All other, including other inventory charges and other period expense(0.3)%
Year Ended December 31, 201771.3%
Manufacturing cost reductions0.8%
Sales pricing and mix(0.2)%
Inventory step-up due to acquisition accounting(0.1)%
Net impact of foreign currency fluctuations(0.8)%
All other, including other inventory charges and other period expense0.4%
Year Ended December 31, 201871.4%


The primary factorfactors contributing to the increase in our gross profit margin for 2016,2018 as compared to 2015, was2017 were the positive impactimpacts of cost reductions as a result ofresulting from our restructuring and other process improvement programs. Partially offsetting these factors was the netprograms and restructuring programs and favorable period expense, partially offset by negative impact ofimpacts from foreign currency fluctuations and other inventory charges and period expenses.fluctuations. The primary factors contributing to the increase in our gross profit margin for 2015,2017 as compared to 2014, primarily resulted from manufacturing2016 were the positive impacts of cost reductions as a result ofresulting from our restructuring and other process improvement programs. Partially offsetting these factors was the netprograms and restructuring program, partially offset by negative impact of pricing declines related primarily to sales of our drug-eluting stentimpacts from foreign currency fluctuations and CRM products. In addition, in connection with the accounting for the AMS Portfolio Acquisition, we adjusted acquired inventory from manufacturing cost to fair value. The step-up in value is amortized throughunfavorable period expense. Our gross profit over an average estimated inventory turnover period. Wemargin in 2017 included unfavorable period expenses due to the charges we recorded increased costin the first quarter of $22 million in 20162017 related to the voluntary removal of Lotus Valve Devices from global commercial and $36 million in 2015 associated with the step-up.clinical sites.

Operating Expenses
The following table provides a summary of certain of our operating expenses:
 Year Ended December 31,
 2016 2015 2014Year Ended December 31,
  % of Net  % of Net  % of Net2018 2017 2016
(in millions) $Sales $Sales $Sales$% of Net Sales $% of Net Sales $% of Net Sales
Selling, general and administrative expenses 3,099
37.0% 2,873
38.4% 2,902
39.3%$3,569
36.3% $3,294
36.4% $3,099
37.0%
Research and development expenses 920
11.0% 876
11.7% 817
11.1%1,113
11.3% 997
11.0% 920
11.0%
Royalty expense 79
0.9% 70
0.9% 111
1.5%70
0.7% 68
0.8% 79
0.9%

Selling, General and Administrative (SG&A) Expenses

In 2016,2018, our SG&A expenses increased $226$275 million, or eight percent, as compared to 2015,2017 and were 140was 10 basis points lower as a percentage of net sales. This decrease in SG&A expenses as a percentage of net sales was primarily driven bydue to leverage from increased sales, as well as the benefit of our targeted initiatives focused on reducing SG&A, as well as the reduction in expenses resulting from the suspension of the Medical Device Excise Tax, which was substantially reinvested into our strategic growth initiatives. The Medical Device Excise Tax was temporarily suspended in December 2015 through December 31, 2017.
In 2015, our SG&A expenses decreased $29such asend-to-end business process streamlining and automation, including functional expansion of global shared service and robotic process utilization. In 2017, our SG&A expenses increased $195 million, or onesix percent, as compared to 2014,2016 and were 9060 basis points lower as a percentage of net sales. This decrease in SG&A expenses as a percentage of net sales was primarily driven by increased net sales, as well as the impactsbenefit of our foreign currency fluctuations and declines in spending as a result of our restructuring and other cost reduction initiatives. We recorded $78 million in 2015 and $72 million in 2014 related to the Medical Device Excise Tax.targeted initiatives focused on reducing SG&A expenses.

Research and Development (R&D) Expenses

We remain committed to advancing medical technologies and investing in meaningful research and development projects across our businesses. In 2016,2018, our R&D expenses increased $44$116 million, or five12 percent, as compared to 2015,2017, and were 70 basis points lower as a percentage of net sales. In 2015, our R&D expenses increased $59 million, or seven percent, as compared to 2014, and were 6030 basis points higher as a percentage of net sales. The year-over-year increase inIn 2017, our R&D expenses was due primarily increased $77 million, or eight percent, as compared to 2016, yet remained flat as a percentage of net sales. R&D expenses increased each year as a result of investments across all of our businesses in order to maintain a healthy pipeline of new products that we believe will contribute to profitable sales growth and increased cost related to recent acquisitions and alliances, partially offset by the favorable impact of foreign currency fluctuations.growth.

Royalty Expense

In 2016,2018, our royaltyRoyalty expense increased $9$2 million, or 13three percent, as compared to 20152017 and remained flat at approximately one percentwas 10 basis points lower as a percentage of net sales for both periods.sales. The increase in royaltyRoyalty expense was in 2018, as compared to 2017, relates primarily due to increasesincreased sales partially offset by expired royalties in net sales ofcertain countries.

In 2017, our drug-eluting coronary stent systems in 2016.
In 2015, our royaltyRoyalty expense decreased $41$11 million, or 3714 percent, as compared to 2014,2016 and was 6010 basis points lower as a percentage of net sales. The decrease in Royalty expense in 2017 as compared to 2016 relates primarily to the renegotiation of a royalty agreement in the second quarter of 2014 that resulted in arenegotiated lower royalty rate structure.structure on certain products.

The following table provides a summary of certain of our other operating expenses, which are excluded by management for purposes of evaluating operating performance:
 Year Ended December 31,
(in millions)2018 2017 2016
Amortization expense$599
 $565
 $545
Intangible asset impairment charges35
 4
 11
Contingent consideration expense (benefit)(21) (80) 29
Restructuring charges (credits)36
 37
 28
Restructuring-related charges (credits)59
 58
 50
Litigation-related net charges (credits)103
 285
 804

Amortization Expense
Our amortization
In 2018, our Amortization expense was $545 increased $33 million, in 2016,or six percent, as compared to $495 million in 2015, an increase of $502017. In 2017, our Amortization expense increased $20 million, or 10 percent. Amortization expense was $495 million in 2015,four percent, as compared to $438 million in 2014, an increase of $57 million or 13 percent.2016. The increases in each period were primarily due to amortizable intangible assets acquired as part of our recent acquisitions including Symetis in the AMS Portfolio Acquisition on August 3, 2015.second quarter of 2017, nVision Medical Corporation (nVision) and NxThera in the second quarter of 2018 and Augmenix in the fourth quarter of 2018.
Amortization expense is excluded by management for purposes of evaluating operating performance.
Intangible Asset Impairment Charges
We have recorded intangible
In 2018, 2017 and 2016, our Intangible asset impairment charges including impairments of in-process research and development, of $11 million in 2016, $19 million in 2015 and $195 million in 2014.
See Note D - Goodwill and Other Intangible Assets to our consolidated financial statements contained in Item 8 of this Annual Report on Form 10-K, for additional details related to our intangible asset impairment charges.
were immaterial. Refer to Critical Accounting Estimates for a discussion of key assumptions used in our goodwill and intangible asset impairment testing and future events that could have a negative impact on the recoverability of our goodwill and amortizable intangible assets. Intangible asset impairment charges are excluded by management for purposes of evaluating operating performance and assessing liquidity.

Contingent Consideration Expense (Benefit)

WeIn 2018 and 2017, we recorded a net expensebenefits, and in 2016, we recorded net expenses related to the change in fair value of our contingent consideration liabilities of $29 million in 2016, a net expense of $123 million in 2015 and a net benefit of $85 million in 2014.liability. Refer to Note B – Acquisitions and Strategic Investments to our consolidated financial statements contained in Item 88. Financial Statements and Supplementary Data of this Annual Report for additional details related to our contingent consideration expenses.arrangements.
Contingent consideration expense is excluded by management for purposes of evaluating operating performance.
Restructuring-related Activities and Charges

We recorded restructuring charges pursuant toRestructuring and Restructuring-related Activities

In 2018, 2017 and 2016, our restructuring plans of $28 million during 2016, $26 million during 2015, and $69 million during 2014. In addition, we recorded expenses within other lines of our accompanying consolidated statements of operations related to our restructuring initiatives of $50 million during 2016, $57 million during 2015, and $48 million during 2014. Restructuring and restructuring-related costs are excluded by managementcharges remained relatively flat for purposes of evaluating operating performance.all periods.

In November 2018, the Board of Directors approved, and we committed to, a new global restructuring program (the 2019 Restructuring Plan). The 2019 Restructuring Plan is expected to result in total pre-tax charges of approximately $200 million to $300 million and reduce gross annual pre-tax operating expenses by approximately $100 million to $150 million by the end of 2022 as program benefits are realized. The 2016 Restructuring Plan is expected to result in total pre-tax charges of approximately $175$275 million to $225$325 million and is expected to reduce gross annual expenses by approximately $115$165 million to $150$175 million by the end of 2020 as program benefits are realized. The

2014 Restructuring Plan resulted in total pre-tax charges of $261 million and will reduce annual expenses by approximately $200 million. We expect aA substantial portion of the savings to befrom both programs are being reinvested in strategic growth initiatives.
We
As of December 31, 2018, we have made cumulative cash payments of $82$197 million in 2016, $95 million in 2015, and $112 million in 2014 associatedassociation with our restructuring initiatives.2016 Restructuring Plan.

See Note HG – Restructuring-related Activities to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report for additional details on our restructuring plans.

Litigation-related Net Charges and Credits(Credits)

We recorded netIn 2018, 2017 and 2016, our litigation-related charges in the amount of $804 million in 2016, $1.105 billion in 2015, and $1.036 billion in 2014. The net charges recordedwere primarily in 2016 include primarily amounts related toconnection with transvaginal surgical mesh product liability cases and claims. The net charges recorded in 2015 include amounts primarily related to transvaginal surgical mesh product liability cases and claims and the charge related to the Mirowski Family Venture LLC (Mirowski) lawsuit following a jury verdict that Guidant Corporation (Guidant) breached their license agreement with Mirowski. The net charges recorded in 2014 include a $600 million charge related to the agreement between our subsidiary, Guidant and Johnson & Johnson signed on February 13, 2015, to settle the breach of merger agreement lawsuit brought by Johnson & Johnson, stemming from our acquisition of Guidant. In exchange, we made aggregate payments totaling $600 million to Johnson & Johnson during 2015. The 2014 net charges also include amounts related to transvaginal surgical mesh product liability cases and claims and certain other items.

Litigation related charges and credits are excluded by management for purposes of evaluating operating performance.

We continue to assess certain litigation and claims to determine the amounts, if any, that management believes will be paid as a result of such claims and litigation, and therefore, additional losses may be accrued and paid in the future, which could materially

adversely impact our operating results, cash flows and/or our ability to comply with our debt covenants. Refer to Note KJ – Commitments and Contingencies to our consolidated financial statements contained in Item 88. Financial Statements and Supplementary Data of this Annual Report for additional discussion of our material legal proceedings.

Interest Expense
Pension Termination Charges

We recorded pension termination charges of $44 million during 2015 associated with the termination of the Guidant Retirement Plan,The following table provides a frozen defined benefit plan. We do not expect to incur any additional charges in the future related to the termination of the Guidant Retirement Plan.

The pension termination charges are excluded by management for purposes of evaluating operating performance.
Gain on Divestiture
In January 2011, we closed the salesummary of our Neurovascular business to Stryker Corporation. We recorded a pre-tax gain of $12 million during 2014 associated with the transaction. These divestiture-related gains are excluded by management for purposes of evaluating operating performance.
Interest Expense
Our interest expense was $233 million in 2016 with an and average borrowing rate of 4.0 percent, as compared to $284 million in 2015, with an average borrowing rate of 5.2 percent. Interest expense in 2015 included a pre-tax charge of approximately $45 million associated with debt extinguishment charges, representing premiums, accelerated amortization of debt issuance costs and investor discount costs net of interest rate hedge gains related to the early extinguishment of $1.000 billion of debt during the second quarter of 2015.rate:
Our interest expense was $284 million in 2015, with an average borrowing rate of 5.2 percent, as compared to $216 million in 2014, with an average borrowing rates of 4.8 percent. The increase was primarily due to the pre-tax charge of approximately $45 million associated with debt extinguishment charges, along with incremental debt to finance the AMS Portfolio Acquisition offset by savings from refinancing our senior notes.
(in millions)Year Ended December 31,
2018 2017 2016
Interest expense$(241) $(229) $(233)
Weighted average borrowing rate3.6% 3.8% 4.0%
Debt extinguishment charges are excluded by management for purposes of evaluating operating performance. Refer to Liquidity and Capital Resources in this Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operationsand Note ED Hedging Activities and Fair Value Measurements and Note FE – Borrowings and Credit Arrangements to our consolidated financial statements contained in Item 88. Financial Statements and Supplementary Data of this Annual Report for information regarding our debt obligations.

Other, net
Our other, net reflected expense of $37 million in 2016, expense of $39 million in 2015, and income of $8 million in 2014. The following are the components of other, net:Other, net:
 Year Ended December 31,Year Ended December 31,
(in millions) 2016201520142018 2017 2016
Interest income $5
$5
$5
$3
 $5
 $5
Foreign currency losses (13)(21)(18)
Net foreign currency gain (loss)11
 (15) (13)
Net gains (losses) on investments (21)(9)27
155
 (92) (21)
Other expense, net (8)(14)(6)
Other income (expense), net(14) (22) (8)
 $(37)$(39)$8
$156
 $(124) $(37)

During 2016,In 2018, we recognized net losses of $21 million due to equity method adjustments on investments and investment impairments which were partially offset by a gain on our Neovasc investment. During 2015, we recognized net losses of $9 million due to equity method adjustments on investments and investment impairments. During 2014, we recognizedrecorded gains of $19$184 million associated withbased on the difference between the book values and the fair values of our previously-held investments immediately prior to the acquisition dates, which aggregated to $251 million. We remeasured the fair value of IoGyn, Inc. relatedeach previously-held investment based on the implied enterprise value and allocation of purchase price consideration according to previously held investmentspriority of equity interests. Gains and other net gains related to our investment portfolio of $8 million. The acquisition-related gains from previously heldlosses recorded on previously-held investments are excluded by management for purposes of evaluating operating performance.

Refer to Note B – Acquisitions and Strategic Investments to our consolidated financial statements contained in Item 88. Financial Statements and Supplementary Data of this Annual Report for information regarding our strategic investments.
Tax Rate
The following table provides a summary of our reported tax rate:
 
Year Ended
December 31,
Year Ended December 31,
 2016201520142018 2017 2016
Reported tax rate (95.9)%63.2 %76.7 %(17.5)% 88.8 % (95.9)%
Impact of certain receipts/charges* 108.3 %(53.5)%(64.5)%
Impact of certain receipts/charges (1)30.7 % (75.8)% 108.3 %
 12.4 %9.7 %12.2 %13.2 % 13.0 % 12.4 %
*These receipts/charges are taxed at different rates than our effective tax rate.
(1)These receipts/charges are taxed at different rates than our effective tax rate.

The change in our reported tax rate for 2016,2018, as compared to 20152017 and 2014,2016, relates primarily to the impact of certain receipts and charges that are taxed at different rates than our effective tax rate, includingrate. These receipts and charges included intangible asset impairment charges, acquisition-related net charges, contingent consideration,items, restructuring and restructuring-related items, litigation-related net charges, restructuring-related net charges, pension termination charges and debt extinguishment charges,items, as well as the impact of certain discrete tax items. Included in the discrete tax items were the effective settlement of our transfer pricing dispute with the Internal Revenue Service (IRS) for the 2001 through 2010 tax years, the conclusion of the IRS examinations of our 2011 through 2013 tax years, and the final impact of the Tax Cuts and Jobs Act (TCJA), enacted on December 22, 2017.


In 2017, these receipts and charges included intangible asset impairment charges, acquisition-related items, restructuring and restructuring-related items, litigation-related items and certain investment impairments. Our reported tax rate for 2017 was also affected by discrete items primarily related to the TCJA.

In 2016, these receipts and charges included intangible asset impairment charges, acquisition-related net charges, litigation-related net chargesitems, restructuring and restructuring-related net charges.items and litigation-related items. Our reported tax rate for 2016 was also affected by discrete items primarily related to the resolution of various uncertain tax positions through settlement or expiration of statute, offset by a charge related to changes in state apportionment.
In 2015, these receipts
During 2010 and charges included intangible asset impairment charges, acquisition-related net charges, litigation-related net charges, restructuring-related net charges, pension termination charges, and debt extinguishment charges. Our reported tax rate for 2015 was also affected by discrete items primarily related to benefits due to settlement2011, we received Notices of various uncertain tax positions and reinstatement of certain tax legislation that has been retroactively applied.
In 2014, these receipts and charges included intangible asset impairment charges, acquisition- and divestiture-related net charges, litigation-related net charges and restructuring-related net charges. Our reported tax rate for 2014 was also affected by discrete tax items primarily related to resolution of various uncertain tax positions resulting from the expiration of the statute of limitations for assessing tax in certain jurisdictions and benefit due to change in uncertain tax positions due to a favorable court ruling, offset by a charge due to translation gain on previously taxed income.
We are contesting in U.S. Tax Court significant proposed adjustmentsDeficiency from the Internal Revenue Service (IRS) reflecting proposed audit adjustments for Guidant Corporation (Guidant) for its 2001 through 2006 tax years and our 2006 and 2007 tax years. The total incremental tax liability asserted by the IRS for the applicable periods was $1.162 billion plus interest. The primary issue in dispute for all years was the transfer pricing associated with the technology license agreements between domestic and foreign subsidiaries of Guidant. In addition, the IRS proposed adjustments in connection with the financial terms of our Transaction Agreement with Abbott Laboratories pertaining to the sale of Guidant's vascular intervention business to Abbott Laboratories in April 2006. During 2014, we received a Revenue Agent Report (RAR) from the IRS reflecting significant proposed audit adjustments to our 2008, 2009 and 2010 tax years based upon the same transfer pricing methodologies that the IRS applied to our 2001 through 2007 tax years.

We contested in U.S. Tax Court the proposed adjustments from the IRS for Guidant for its 2001 through 2006 tax years and our 2006 and 2007 tax years related to its audit of our transfer pricing methodologies for the 2001 through 2007 tax years. The IRS also proposed similar transfer pricing adjustments for the 2008 through 2010 tax years. We disagree with the transfer pricing methodologies being applied by the IRS

and we were scheduled to go to trial in the U.S. Tax Court in late July 2016. On July 19,methodologies. During 2016, we entered a Stipulation of Settled Issues with the IRS intended to resolve all of the aforementioned transfer pricing issues, as well as issues related to our 2006 transaction with Abbott for the 2001 through 2007 tax years. The Stipulation of Settled Issues isLaboratories. This stipulation was contingent upon the IRS Office of Appeals (IRS Appeals) applying the same basis of settlement to all transfer pricing issues for the Company’s 2008 2009, andthrough 2010 tax years, and if applicable, reviewyears.

In the second quarter of 2018, a decision was entered by the United States Congress Joint Committee on Taxation. In October 2016, we reached an agreement in principle with IRS Appeals asU.S. Tax Court resolving all disputes related to the resolution of the transfer pricing issues infor Guidant for its 2001 through 2006 tax years and our 2006 and 2007 tax years as well as the tax issues related to our 2006 transaction with Abbott Laboratories. Additionally, we resolved all issues with the IRS Office of Appeals for our 2008 2009, andthrough 2010 tax years, subjectincluding the transfer pricing issue and other unrelated issues. The final settlement calculation included certain elections made in these relevant years and resulted in a final net tax payment of $303 million plus $307 million of estimated interest, which was remitted in the second quarter of 2018. Due to additional calculationsthe final settlement of these disputes, we recorded a net tax as well as documentation to memorialize our agreement. benefit of $250 million in 2018.

In the event thatfourth quarter of 2018, we received a RAR from the conditionsIRS for our 2011 through 2013 tax years. The RAR reflected transfer pricing adjustments consistent with the basis of settlement for all transfer pricing issues agreed to in the Stipulation of Settled Items are satisfied, we expectIssues. We remitted $93 million to makethe IRS in the fourth quarter of 2018 reflecting the net balance of tax paymentsand interest due for these years after consideration of approximately $275 million, plus interest throughamounts owed to us by the date of payment. If finalized, payments relatedIRS. Due to the resolution are expected in the next nine to 18 months. We believe that our income tax reserves associated with these matters are adequate as of December 31, 2016 and we do not expect to recognize any additional charges related to resolution of this controversy. However, the final resolution of these issues is contingent and if the Stipulationtax years, we recorded a net tax benefit of Settled Issues is not finalized, it could have a material impact on our financial condition, results of operations, or cash flows.$90 million.

See Note JI - Income Taxes to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report for additional details on our tax rate and our tax litigation.rate.


Liquidity and Capital Resources

Based on our current business plan, we believe our existing balance of cashCash and cash equivalents, future cash generated from operations, and access to capital markets and existing credit facilities will be sufficient to fund our operations, invest in our infrastructure, pay our legal-related liabilities, pay taxes due, fund possible mergers and/or acquisitions and service and repay our existing debt. Please refer to our Contractual Obligations and Commitments table below for additional details on our future payment obligations and commitments.

As of December 31, 2016,2018, we had $196$146 million of cashCash and cash equivalents on hand, comprised of $42$13 million invested in money market and government funds and $154$133 million in short-term time deposits and interest bearing and non-interest bearingnon-interest-bearing bank accounts. We invest excess cash on hand in short-term financial instruments that earn at market interest rates while mitigating principal risk through instrument and counterparty diversification, as well as what we believe to be prudent instrument selection. We limit our direct exposure to securities in any one industry or issuer. We also have full access to our $2.000$2.750 billion commercial paper program, which is backed by our 2018 revolving credit facility and $240 millionentered into on December 19, 2018. As of December 31, 2018, we had $1.248 billion in commercial paper debt outstanding resulting in an additional $1.502 billion of available liquidity.


For the purpose of funding the proposed BTG Acquisition, as described below, we have access to a bridge facility entered into on November 20, 2018 (Bridge Facility), which is comprised of a £3.115 billion debt bridge facility and a £200 million cash bridge facility for an aggregate principal amount of £3.315 billion. Borrowings from the debt bridge facility mature in 364 days from the date of the first borrowing under the Bridge Facility, and borrowings from the cash bridge facility mature 90 days from the date of the first borrowing under the Bridge Facility. In addition, on December 19, 2018, we entered into a $1.000 billion two-year delayed draw term loan credit facility, maturing in two years from the date of the closing of the proposed BTG Acquisition (Two-Year Delayed Draw Term Loan) and a $1.000 billion three-year delayed draw term loan credit facility, maturing in three years from the date of the closing of the proposed BTG Acquisition (Three-Year Delayed Draw Term Loan). As of December 31, 2018, we had no amounts borrowed under the Bridge Facility, the Two-Year Delayed Draw Term Loan or the Three-Year Delayed Draw Term Loan. In December 2018, in connection with our new term loans and currency hedging activities, we reduced the debt bridge facility by an aggregate amount of £1.569 billion to a remaining available amount of £1.546 billion.

On December 19, 2018 and effective on December 20, 2018, we terminated our $400 million credit and security facility secured by our U.S. trade receivablesreceivables. We had no amounts outstanding under this facility as of December 31, 2016, both described below.2017.

For additional information on our credit facilities, refer to Note E – Borrowings and Credit Arrangements to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report.
The following provides a summary and description of our net cash inflows (outflows) for the years ended December 31, 2016, 2015 and 2014:

:
 Year Ended December 31,Year Ended December 31,
(in millions) 2016201520142018 2017 2016
Cash provided by operating activities $972
$600
$1,269
Cash used for investing activities (887)(2,186)(745)
Cash provided by (used for) operating activities$310
 $1,426
 $1,182
Cash provided by (used for) investing activities(1,921) (1,010) (887)
Cash provided by (used for) financing activities (206)1,322
(150)1,432
 110
 (206)
     
Cash provided by (used for) operating activities$310

$1,426

$1,182
Less: Purchases of property, plant and equipment316
 319
 376
Add: Proceed on disposals of property, plant and equipment14
 
 29
Free cash flow8

1,107

835
Add: Restructuring and restructuring-related payments89
 72
 52
Add: Acquisitions-related payments205
 95
 108
Add: Certain discrete tax payments (refunds/credits)977
 (239) (74)
Add: Litigation-related settlements791
 694
 701
Adjusted free cash flow2
$2,070

$1,729

$1,622
Operating Activities
During 2016,In 2018, cash provided byfrom operating activities was $972 million,decreased $1.116 billion, or 78 percent, as compared to $600 million2017. This decrease was primarily due to the IRS tax settlement in 2015, an increase of $3722018.
In 2017, cash from operating activities increased $244 million, or 62 percent.21 percent, as compared to 2016. This increase was primarily driven by the increase in net incomeoperating profit for 20162017 compared to 2015, partially offset2016.




2Adjusted free cash flow, which excludes certain items required by approximately $100 million increaseU.S. GAAP is not prepared in litigation-related payments. During 2016, we made litigation-related payments primarily associatedaccordance with U.S. GAAP and should not be considered in isolation from, or as a replacement for, the transvaginal surgical mesh product liability cases and to Mirowski.
most directly comparable GAAP measure. Refer to Note K – Commitments and ContingenciesAdditional Information for additional information on litigation-related matters.
During 2015, we generated $600 milliona discussion of cash from operating activities, as compared to $1.269 billion in 2014, a decreasemanagement’s use of $669 million, or 53 percent. This decrease was primarily due to the $600 million of payments to Johnson & Johnson.non-GAAP financial measures.

Investing Activities
DuringIn 2018, cash used for investing activities included $1.448 billion of payments, net of cash acquired, for acquisitions including Augmenix, NxThera, Cryterion Medical, Inc., Claret and nVision, $316 million of payments for purchases of property, plant and equipment and $172 million of payments related to investments and acquisitions of certain technologies, including our $90 million investment in Millipede, Inc. in the first quarter of 2018.
In 2017, cash used for investing activities included $560 million of payments, net of cash acquired, for acquisitions including Symetis and Apama Medical Inc. (Apama), $319 million of payments for purchases of property, plant and equipment, including amounts to complete our manufacturing plant in Malaysia and $131 million of payments related to investments and acquisitions of certain technologies.
In 2016, cash used for investing activities was $887 million. Our investing activities primarily included $408 million of payments net of cash acquired, for acquisitions including Cosman, EndoChoice, LumenR, Distal and Neovasc; along with $376 million in purchases of property, plant and equipment and $132 million of payments related to strategic investments and acquisitions of certain technologies, partially offset by proceeds from the sale of one of two buildings located in Quincy, Massachusetts for $29 million. We intend to invest approximately $300 million in purchases of property, plant and equipment during 2017.
During 2015, cash used for investing activities was $2.186 billion. Our investing activities included $1.734 billion of payments net of cash acquired, for acquisitions, including the AMS Portfolio Acquisition, CeloNova and Xlumena; along with $266 million of payments related to strategic investments, including equity investments in Preventice, Inc. and Frankenman Medical Equipment Company. Cash used for investing activities also included purchases of property, plant and equipment of $247 million.
During 2014, cash used for investing activities was $745 million. Our investing activities included $486 million of payments, net of cash acquired, for acquisitions including IoGyn and the Interventional Division of Bayer AG; along with purchases of property, plant and equipment of $259 million.
Financing Activities
Our cash flows from financing activities reflect issuances and repayments of debt, payments of acquisition-related contingent consideration,including our commercial paper program and cash used tofor new share settlesettlement and stock issuances related to our equity incentive programs, as discussed in Note LK - Stockholders' Equity to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report. Additionally, our financing activities included $65$19 million of contingent payments in 2016, $1562018, $33 million of payments in 20152017 and $34$65 million of payments in 20142016 associated with our previous acquisitions.
Our liquidity plans are subject to a number of risks and uncertainties, including those described in Item 1A. Risk Factors of this Annual Report, some of which are outside our control. Macroeconomic conditions, adverse litigation outcomes and other riskrisks and uncertainties could limit our ability to successfully execute our business plans and adversely affect our liquidity plans.

Debt

We hadThe following table presents the current and long-term portions of our total debt:
 As of
(in millions)December 31, 2018 December 31, 2017
Current debt obligations$2,253
 $1,801
Long-term debt4,803
 3,815
Total debt$7,056
 $5,616

The following table presents the portions of our total debt that are comprised of $5.484 billion as of December 31, 2016fixed and $5.677 billion as of December 31, 2015variable rate debt instruments, which consisted of the following:are presented on an amortized cost basis:
Revolving Credit Facility
In April 2015, we entered into a new $2.000 billion revolving credit facility (the 2015 Facility) with a global syndicate of commercial banks and terminated our previous $2.000 billion revolving credit facility. The 2015 Facility matures in April 2020. There were no amounts borrowed under our current or prior revolving credit facility as of December 31, 2016 or December 31, 2015.
 As of
(in millions)December 31, 2018 December 31, 2017
Fixed-rate debt instruments$4,797
 $4,414
Variable rate debt instruments2,259
 1,202
Total debt$7,056
 $5,616
Term Loans
As of December 31, 2016, we had an aggregate $750 million outstanding under our unsecured term loan facilities and $1.000 billion outstanding under these facilities as of December 31, 2015. These facilities include an unsecured term loan facility entered into in August 2013 (2013 Term Loan) which had $150 million outstanding as of December 31, 2016 and $250 million outstanding as of December 31, 2015, along with an unsecured term loan credit facility entered into in April 2015 (2015 Term Loan) which had $600 million outstanding as of December 31, 2016 and $750 million outstanding as of December 31, 2015.
Our revolving credit facility and our term loan facilities require that we maintain certain financial covenants as outlined in Note F – Borrowings and Credit Arrangements to our consolidated financial statements contained in Item 8 of this Annual Report. As of and through December 31, 2016,2018, we were in compliance with all the required covenants. Any inabilitycovenants related to maintain compliance with these covenants could require us to seek to renegotiate the terms of our credit facility or seek waivers from compliance with these covenants, both of which could result in additional borrowing costs. Further, there can be no assurance that our lenders would agree to such new terms or grant such waivers.

Senior Notes

We had senior notes outstanding of $4.650 billion as of December 31, 2016 and as of December 31, 2015. Our senior notes were issued in public offerings, are redeemable prior to maturity and are not subject to any sinking fund requirements. Our senior notes are unsecured, unsubordinated obligations and rank on parity with each other. These notes are effectively junior to borrowings under our credit and security facility, to the extent if borrowed by our subsidiaries, and to liabilities of our subsidiaries.

On January 12, 2017, we used our existing credit facilities to repay the $250 million plus interest of our senior notes due in January 2017.

The debt maturity schedule for the significant components of our debt obligations as of December 31, 2016 is as follows:
    
(in millions)2017 2018 2019 2020 2021 Thereafter Total
Senior Notes$250
 $600
 $
 $1,450
 $
 $2,350
 $4,650
Term Loans
 225
 150
 375
 
 
 750
 $250
 $825
 $150
 $1,825
 $
 $2,350
 $5,400
Note:The table above does not include unamortized discounts associated with our senior notes, or amounts related to interest rate contracts used to hedge the fair value of certain of our senior notes or debt issuance costs.
Other Arrangements
We maintained a $300 million credit and security facility secured by our U.S. trade receivables maturing on June 9, 2017. We had borrowings of $60 million outstanding under this facility as of December 31, 2016 and no borrowings outstanding as of December 31, 2015. On February 7, 2017, we amended the terms of this credit and security facility, including increasing the facility size to $400 million. This amendment retained a similar maximum leverage ratio requirement and extended the facility maturity to February 2019.
We also have accounts receivable factoring programs in certain European countries that we account for as sales under Financial Accounting Standards Board (FASB) Accounting Standards Codification® (ASC) Topic 860, Transfers and Servicing. These agreements provide for the sale of accounts receivable to third parties, without recourse, of up to approximately $391 million as of December 31, 2016. We de-recognized $152 million of receivables as of December 31, 2016 at an average interest rate of 1.8 percent, and $151 million as of December 31, 2015 at an average interest rate of 2.4 percent.
In addition, we have uncommitted credit facilities with a commercial Japanese bank that provide for borrowings, promissory notes discounting and receivables factoring of up to 21.000 billion Japanese yen (approximately $180 million as of December 31, 2016). We de-recognized $149 million of notes receivable as of December 31, 2016 at an average interest rate of 1.6 percent and $132 million of notes receivable as of December 31, 2015 at an average interest rate of 1.6 percent. De-recognized accounts and notes are excluded from trade accounts receivable, net in the accompanying audited consolidated balance sheets.
We had outstanding letters of credit of $44 million as of December 31, 2016 and as of December 31, 2015. As of December 31, 2016 and 2015, none of the beneficiaries had drawn upon the letters of credit or guarantees. We believe we will generate sufficient cash from operations to fund these arrangements and intend to fund these arrangements without drawing on the letters of credit,
obligations. For additional details related to our debt obligations, including our revolving credit facility, term loans, senior notes and other arrangements, seedebt covenant requirements, refer to Note FE – Borrowings and Credit Arrangements to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report.


Equity
During 20162018 we received $111$101 million in proceeds from stock issuances related to our stock option and employee stock purchase plans, as compared to $114$85 million in 20152017 and $60$111 million 2014.2016. Proceeds from the exercise of employee stock options and employee stock purchases vary from period to period based upon, among other factors, fluctuations in the trading price of our common stock and in the exercise and stock purchase patterns of employees.
We repurchased 10 milliondid not repurchase any shares for $125 millionof our common stock during 2014. No share repurchases were made in 20162018, 2017, or 2015.2016. As of December 31, 2016,2018, we had remaining approximately $535 million authorized under our 2013 share repurchase program. There were approximately 248 million shares in treasury as of December 31, 20162018 and December 31, 2015.2017.
Stock-based compensation expense related to our stock ownership plans was $140 million in 2018, $127 million in 2017 and $116 million in 2016, $107 million in 2015, and $103 million in 2014.2016. Stock-based compensation expense varies from period to period based upon, among other factors:factors, the timing, number and fair value of awards granted during the period;period, forfeiture levels related to unvested awards;awards and employee contributions to our employee stock purchase plan.

Contractual Obligations and Commitments
The following table provides a summary of certain information concerning our obligations and commitments to make future payments and is based on conditions in existence as of December 31, 2016.2018:
   
 (in millions) 2017 2018 2019 2020 2021 Thereafter Total
Long-term debt obligations $250
 $825
 $150
 $1,825
 $
 $2,350
 $5,400
Interest payments (1) 224
 216
 194
 151
 111
 899
 1,795
Lease obligations (1) 66
 60
 42
 34
 25
 64
 291
Purchase obligations (1) 321
 52
 39
 19
 12
 15
 458
Minimum royalty obligations (1) 1
 2
 1
 2
 1
 1
 8
Legal reserves 1,062
 
 
 
 
 
 1,062
Unrecognized tax benefits (2) 577
 
 
 
 
 
 577
  $2,501
 $1,155
 $426
 $2,031
 $149
 $3,329
 $9,591
 (in millions)2019 2020 2021 2022 2023 Thereafter Total
Debt obligations (1)$2,248
 $1,450
 $
 $500
 $450
 $2,400
 $7,048
Interest payments (2)245
 190
 156
 147
 139
 928
 1,804
Lease obligations (2)73
 61
 47
 39
 31
 111
 362
Purchase obligations (2)362
 23
 12
 3
 2
 7
 409
Minimum royalty obligations (2)4
 5
 3
 2
 2
 2
 17
Legal reserves712
 
 
 
 
 
 712
One-time transition tax9
 40
 40
 40
 75
 225
 429
Acquisition (3)325
 
 
 
 
 
 325
 $3,977
 $1,768
 $257
 $731
 $699
 $3,673
 $11,106
(1)
Debt obligations are comprised of our senior notes, term loan and commercial paper outstanding as of December 31, 2018. This does not include unamortized debt issuance discounts, deferred financing costs and gain on fair value hedges or capital lease obligations. Refer to Note E – Borrowings and Credit Arrangements to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report for additional information.
(2)
In accordance with U.S. GAAP, these obligations relate to expenses associated with future periods and are not reflected in our consolidated balance sheets. Interest payments included above are calculated based on rates and required fees applicable to our outstanding debt obligations as of December 31, 2018 described in Note E – Borrowings and Credit Arrangements to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report. Interest payments above do not include interest on variable rate debt instruments. Lease obligations included an immaterial amount of capital leases which are included in our consolidated balance sheets as of December 31, 2018.
(2)(3)Includes accrued interest
On January 29, 2019, we announced the closing of our acquisition of Millipede, Inc. (Millipede) after exercising our option to acquire the remaining shares of Millipede in the fourth quarter of 2018 upon the recent successful completion of a first-in-human clinical study. The transaction price for the remaining stake consists of an upfront cash payment of $325 million, which was paid in January 2019 and penaltiesincluded in the table above, and other related items.up to an additional $125 million payment upon achievement of a commercial milestone, which has not been achieved and is not included in the table above. Refer to Note B – Acquisitions and Strategic Investments to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report for additional information.

The amounts in the table above with respect to lease obligations represent amounts pursuant to contractual arrangements for the lease of property, plant and equipment used in the normal course of business. Purchase obligations relate primarily to non-cancellable inventory commitments and capital expenditures entered in the normal course of business. Royalty obligations reported above represent minimum contractual obligations under our current royalty agreements.

The table above does not include $584 million of unrecognized tax benefits and $197 million of accrued interest and penalties, and other related items because the timing of their future cash settlement is uncertain. Refer to include:

Note J - Income Taxes to our consolidated financial statements included in Item 8 of this Annual Report for more information on these unrecognized tax benefits. In addition, the table above does not reflect our accrualOur long-term liability for legal matters that are probable and estimable of $961$217 million due to the timing of payment being uncertain. Refer to Note KJ – Commitments and Contingencies to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report for more information,


Unrecognized tax benefits, accrued interest and penalties and other related items totaling $266 million because the timing of their future cash settlement is uncertain and tax payments and interest totaling $5 million related to state obligations of recently settled IRS tax years to be remitted in 2019. Refer to Note I - Income Taxes to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report for more information,

Our recommended offer to acquire BTG plc (BTG) announced on November 20, 2018 for an upfront cash payment of approximately £3.311 billion or approximately $4.225 billion based on the exchange rate of U.S. $1.28: £1.00 on December 31, 2018 (the proposed BTG Acquisition). Refer to Note B – Acquisitions and Strategic Investments to our legal accrual.consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report for more information,

With certain of our acquisitions, we acquired in-process research and developmentIPR&D projects that require future funding to complete the projects. The primary basis for determining the technological feasibility or completion of these projects is obtaining regulatory approval to market the underlying products in an applicable geographic region. We estimate that the total remaining R&D cost to complete the in-process research and developmentacquired IPR&D projects we acquired is between $25$55 million and $50$65 million. Net cash inflows from the projects currently in development are expected to commence in 20172018 and will continue through 2030,2031, following the respective launches of these technologies in the U.S., Europe and Japan. Certain of our acquisitions also involve the potential payment of contingent consideration. The table above does not reflect any such obligations, asconsideration, but the timing and amounts are uncertain. See Note B – Acquisitions and Strategic Investments to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report for the estimated maximum potential amount of future contingent consideration we could be required to pay associated with prior acquisitionsmore information, and the fair value

The $275 million purchase agreement that on September 12, 2018, Channel Medsystems, Inc. (Channel) filed a complaint in Delaware Chancery Court against us for alleged breach of our contingent consideration liabilities as of December 31, 2016.

Legal Matters
For a discussion of our material legal proceedings seepurchase agreement with Channel. Refer to Note KJ – Commitments and Contingencies to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report for more information.

Legal Matters

For a discussion of our material legal proceedings see Note J – Commitments and Contingencies to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report.

Critical Accounting Policies and Estimates
Our financial results are affected by the selection and application of accounting policies and methods. We have adopted accounting policies to prepare our consolidated financial statements in conformity with U.S. GAAP.
To prepare our consolidated financial statements in accordance with U.S. GAAP, management makes estimates and assumptions that may affect the reported amounts of our assets and liabilities, the disclosure ofincluding our contingent liabilitiesliability, as of the date of our financial statements and the reported amounts of our revenues and expenses during the reporting period.periods. Our actual results may differ from these estimates. We consider estimates to be critical (i) if (i) we are required to make assumptions about material matters that are uncertain at the time of estimation or (ii) if (ii) materially different estimates could have been made or it is reasonably likely that the accounting estimate will change from period to period. The following are areas considered to be critical and require management’s

judgment: Revenue Recognition, Bad Debt Reserves, Inventory Provisions, Valuation of Intangible Assets and Contingent Consideration Liabilities and Intangible Assets,Liability, Goodwill Valuation, Legal and Product Liability Accruals and Income Taxes.
See Note A – Significant Accounting Policies to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report for additional information related to our accounting policies and our consideration of these critical accounting areas. In addition, see Note B – Acquisitions and Strategic Investments and Note DC - Goodwill and Other Intangible Assets for further discussion onof the valuation of goodwill and intangible assets and contingent consideration;consideration, Note JI - Income Taxes for further discussion onof income tax related matters, and Note KJ – Commitments and Contingencies for further discussion onof legal and product liability matters.matters and Note O – Revenue for further discussion of revenue recognition.
Revenue Recognition

Deferred Revenue

We record a contract liability, or deferred revenue, when we have an obligation to provide a product or service to the customer and payment is received or due in advance of our performance. When we sell a device with a future service obligation, we defer revenue on the unfulfilled performance obligation and recognize this revenue over the related service period. Many of our Cardiac Rhythm Management (CRM) product offerings combine the sale of a device with our LATITUDE™ Patient Management System, which represents a future service obligation. Generally, we do not have observable evidence of the standalone selling price related

to our future service obligations; therefore, we estimate the selling price using an expected cost plus a margin approach. We allocate the transaction price using the relative standalone selling price method. The use of alternative estimates could result in a different amount of revenue deferral.

Contract liabilities are classified within Other current liabilities and Other long-term liabilities on our accompanying consolidated balance sheets. Our contractual liabilities are primarily composed of deferred revenue related to the LATITUDE Patient Management System. Revenue is recognized over the average service period which is based on device and patient longevity.

Variable Consideration

We generally allow our customers to return defective, damaged and, in certain cases, expired products for credit. We base our estimate for sales returns upon historical trends and record these amountsthe amount as a reduction ofto revenue when we sell the initial product. In addition, we may allow customers to return previously purchased products for next-generation product offerings. For these transactions, we defer recognition of revenue on the sale of the earlier generation product based upon an estimate of the amount of product to be returned when the next-generation products are shipped to the customer. Uncertain timing of next-generation product approvals, variability in product launch strategies, product recalls and variation in product utilization all affect our estimates related to sales returns and could cause actual returns to differ from these estimates.

ManyWe also offer sales rebates and discounts to certain customers. We treat sales rebates and discounts as a reduction of revenue and classify the corresponding liability as current. We estimate rebates for products where there is sufficient historical information available to predict the volume of expected future rebates. If we are unable to reasonably estimate the expected rebates, we record a liability for the maximum rebate percentage offered.

Post Implant Services

We provide non-contractual services to customers to ensure the safe and effective use of certain implanted devices. Since our CRM product offerings combinemodified retrospective adoption of FASB ASC Topic 606, Revenue from Contracts with Customers on January 1, 2018, because the sale of a device with our LATITUDE™ Patient Management System, which represents a future service obligation. For revenue arrangements with multiple deliverables, where the sale of a device is combined with a future service obligation, we defer revenue on the undelivered element and recognize this revenue over the related service period. Generally, we do not have vendor specific objective evidence of selling price available related to the immaterial services is recognized before they are delivered, we forward accrue the costs to provide these services at the time the devices are sold. We record these costs to Selling, general and administrative expenses. We estimate the amount of time spent by our futurerepresentatives performing these services and their compensation throughout the device life to determine the service obligations; therefore, we determinecost. Changes to our estimates of selling price using third party evidence when available; otherwise, we use our best estimate of selling price. We allocate arrangement consideration usingbusiness practice or the relative selling price method. The use of alternative estimates of fair value could result in a different amount of accrued cost. Refer to Note A – Significant Accounting Policies and Note O – Revenue to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report for further information on our adoption of FASB ASC Topic 606 and our revenue deferral.recognition accounting policies.
Inventory Provisions
We base our provisions for excess, expired and obsolete inventory primarily on our estimates of forecasted net sales. A significant change in the timing or level of demand for our products as compared to forecasted amounts may result in recording additional provisions for excess, expired and obsolete inventory in the future. Further, the industry in which we participate is characterized by rapid product development and frequent new product introductions. Uncertain timing of next-generation product approvals, variability in product launch strategies, product recalls and variation in product utilization all affect our estimates related to excess, expired and obsolete inventory.
Valuation of Intangible Assets and Contingent Consideration LiabilitiesLiability
We base the fair value of identifiable intangible assets acquired in a business combination, including in-process research and development,IPR&D, on detailed valuations that use information and assumptions provided by management, which consider management’s best estimates of inputs and assumptions that a market participant would use. Further, for those arrangements that involve potential future contingent consideration, we record on the date of acquisition a liability equal to the fair value of the estimated additional consideration we may be obligated to make in the future. We re-measure this liability each reporting period and record changes in the fair value through a separate line item within our consolidated statements of operations. Increases or decreases in the fair value of the contingent consideration liability can result from changes in discount periods and rates, as well as changes in theperiods, timing and amount of projected revenue estimates or in the timing or likelihood of achieving regulatory, revenue or commercialization-based milestones. The use of alternative valuation assumptions, including estimated revenue projections;projections, growth rates;rates, cash flows, and discount rates, and alternative estimated useful life assumptions, or probabilities surrounding the achievementprobability of achieving clinical, regulatory or revenue-based milestones could result in different purchase price allocations and recognized amortization expense and contingent consideration expense or benefit in current and future periods.

We review intangible assets subject to amortization quarterly to determine if any adverse conditions exist or a change in circumstances has occurred that would indicate impairment or a change inadjustment to the remaining useful life. If anwe determine it is more likely than not that the asset is impaired based on our qualitative assessment of impairment indicator exists,indicators, we test the intangible asset for recoverability. If the carrying value of the intangible asset is determined not recoverable, we will write the carrying value down to fair value in the period identified. We calculate fair value of our intangible assets as the present value of estimated future cash flows we expect to generate from the asset using a risk-adjusted discount rate. The use of alternative assumptions, including estimated cash flows, discount rates and alternative estimated remaining useful lives could result in different calculations of impairment.
In addition, we test our indefinite-lived intangible assets at least annually for impairment and reassess their classification as indefinite-lived assets, or more frequently if change in circumstance or indicators exist. We

assess qualitative factors to determine whether the existence of events and circumstances indicate that it is more likely than not that our indefinite-lived intangible assets are impaired. If we conclude that it is more likely than not that the asset is impaired, we then determine the fair value of the intangible asset and perform the quantitative impairment test by comparing the fair value with the carrying value in accordance with FASB ASC Topic 350, Intangibles - Goodwill and Other (FASB ASC Topic 350). If the carrying value exceeds the fair value of the indefinite-lived intangible asset, we write the carrying value down to the fair value. The use of alternative valuation assumptions, including estimated revenue projections, growth rates, cash flows and discount rates could result in different fair value estimates.

Goodwill Valuation

We allocate any excess purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination to goodwill. 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 impairment may exist. We assess goodwill for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment, referred to as a component. In 2016, we identified six operating segments including Interventional Cardiology, Peripheral Interventions, Rhythm Management, Endoscopy, Urology and Pelvic Health, and Neuromodulation for purposes of identifying our reporting units. We then assessed whether any components of these segments constitute a business for which discrete financial information is available and where segment management regularly reviews the operating results of that component. We identified Rhythm Management as having two components: Cardiac Rhythm Management and Electrophysiology.

For our 2016, 20152018, 2017 and 20142016 annual impairment assessment, we identified seven reporting units, which align to our seven core businesses:units: Interventional Cardiology, Peripheral Interventions, Cardiac Rhythm Management, Electrophysiology, Endoscopy, Urology and Pelvic Health and Neuromodulation. For ourBeginning in 2016, annual impairment assessment we aggregated the Cardiac Rhythm Management and Electrophysiology reporting units, components of the Rhythm Management operating segment, based on the criteria prescribed in FASB ASC Topic 350.350. These reporting units were aggregated due to a reorganization that commenced in 2015 that resulted in integrated leadership, shared resources and consolidation of certain sites in 2016.

In performing theRefer to Note A – Significant Accounting Policies to our consolidated financial statements contained in Item 8. Financial Statements and Supplementary Data of this Annual Report for additional details related to our annual goodwill impairment assessment, we utilize both the optional qualitative assessmentassessments performed in 2018, 2017 and the two-step approach prescribed under 2016.FASB ASC Topic 350. Beginning in 2016, the qualitative assessment was used for testing certain reporting units where fair value has historically exceeded carrying value by greater than 100%. All other reporting units were tested using the two-step approach described below. The qualitative assessment requires an evaluation of whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount based on an assessment of relevant events including macroeconomic factors, industry and market conditions, cost factors, overall financial performance and other entity-specific factors. After assessing the totality of events, if it is determined that it is not more likely than not that the fair value of the reporting unit is less than its carrying value, the first and second steps of the goodwill impairment test are unnecessary. If it is determined that impairment is more likely than not, then we perform the first step of the two-step impairment test. In 2016, for all reporting units tested using the optional qualitative assessment, we concluded that it was not necessary to perform the first step of the two-step goodwill impairment test. The first step requires a comparison of the carrying value of the reporting units to the fair value of these units.

For our 2016, 2015 and 2014 annual impairment assessment, for those reporting units for which a quantitative test was performed, we used only the income approach, specifically the discounted cash flow (DCF) method, to derive the fair value of each of our reporting units in preparing our goodwill impairment assessments. This approach calculates fair value by estimating the after-tax cash flows attributable to a reporting unit and then discounting these after-tax cash flows to a present value using a risk-adjusted discount rate. We selected this method as being the most meaningful in preparing our goodwill assessments because we believe the income approach most appropriately measures our income producing assets. We have considered using the market approach and cost approach but concluded they are not appropriate in valuing our reporting units given the lack of relevant market comparisons available for application of the market approach and the inability to replicate the value of the specific technology-based assets within our reporting units for application of the cost approach. Therefore, we believe that the income approach represents the most appropriate valuation technique for which sufficient data are available to determine the fair value of our reporting units.

In applying the income approach to our accounting for goodwill, we make assumptions about the amount and timing of future expected cash flows, terminal value growth rates and appropriate discount rates. The amount and timing of future cash flows within our DCF analysis is based on our most recent operational budgets, long range strategic plans and other estimates. The terminal value growth rate is used to calculate the value of cash flows beyond the last projected period in our DCF analysis and reflects our best estimates for stable, perpetual growth of our reporting units. We use estimates of market-participant risk-adjusted weighted-average cost of capital (WACC) as a basis for determining the discount rates to apply to our reporting units’ future expected cash flows.

If the carrying value of a reporting unit exceeds its fair value, we then perform the second step of the goodwill impairment test to measure the amount of impairment loss, if any. If the carrying value of a reporting unit is zero or negative, we evaluate whether

it is more likely than not that a goodwill impairment exists. If we determine adverse qualitative factors exist that would indicate it is more likely than not an impairment exists, we then perform the second step of the goodwill test. The second step of the goodwill impairment test compares the estimated fair value of a reporting unit’s goodwill to its carrying value.

Although we use consistent methodologies in developing the assumptions and estimates underlying the fair value calculations used in our impairment tests, these estimates are uncertain by nature and can vary from actual results. The use of alternative valuation assumptions, including estimated revenue projections, growth rates, cash flows and discount rates could result in different fair value estimates.

InFuture events that could have a negative impact on the second quarterlevels of 2016, 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. Because our global Electrophysiology reporting unit was identified as being at higher risk of potential goodwill impairment during our 2015 annual test, it was tested for impairment on a stand-alone basis in the second quarter of 2016, immediately prior to aggregating it with our global Cardiac Rhythm Management reporting unit. The fair value of the stand-alone global Electrophysiology reporting unit exceeded the carrying value by approximately 36 percent. In comparison, the global Electrophysiology reporting unit had excess fair value of approximately 28 percent as of our 2015 annual test. As of the date of our 2016 annual goodwill impairment test, the aggregated global Electrophysiology and Cardiac Rhythm Management operating segment (Rhythm Management) had excess fair value over carrying value of approximately 70 percentour reporting units include, but are not limited to, the following:

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 held $292 millionpenetration 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 implement successfully 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 allocated goodwill. As such, it was not deemed at higher risksuccess of ongoing and future impairment. Changesresearch 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 weighted average cost of capital (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 future impairments of goodwill within our reporting units.impairment charges.

Refer to Note DC - Goodwill and Other Intangible Assets to our consolidated financial statements contained in Item 78. Financial Statements and Supplementary Data of this Annual Report on Form 10-K for additional details related to our annual goodwill impairment tests.balances.

Legal and Product Liability Accruals

In the normal course of business, we are involved in various legal and regulatory proceedings, including intellectual property, breach of contract, securities litigation and product liability suits. In some cases, the claimants seek damages, as well as other relief, which, if granted, could require significant expenditures or impact our ability to sell our products. We accrue anticipated costs of settlement, damages, losses for product liability claims and, under certain conditions, costs of defense, based on historical experience or to the extent specific losses are probable and estimable. Otherwise, we expense these costs as incurred. If the estimate of a probable loss is a range and no amount within the range is more likely, we accrue the minimum amount of the range. Litigation and product liability matters are inherently uncertain, and the outcomes of individual matters are difficult to predict and quantify. As such, significant judgment is required in determining our legal and product liability accruals. Our estimates related to our legal and product liability accruals may change as additional information becomes available to us, including information related to the nature or existence of claims against us;us, trial court or appellate proceedings;proceedings, and mediation, arbitration or settlement proceedings.

Income Taxes

We provide for potential amounts due in variousestablish reserves when we believe that certain positions are likely to be challenged despite our assertion that our tax jurisdictions. In the ordinary coursereturn positions are fully supportable. The calculation of conducting business in multiple countries andour tax jurisdictions, there are many transactions and calculations where the ultimate tax outcome is uncertain. Therefore,liabilities involves significant judgment is required based on individual facts, circumstances and information available in determining whether oraddition to applying complex tax regulations in various jurisdictions across our global operations. Under U.S. GAAP, in order to recognize an uncertain tax benefit, the taxpayer must determine it is more likely than not based on technical merits, the position will be sustained, and the measurement of the benefit is calculated as the largest amount that is more than 50 percent likely to be realized upon examination. In our opinion,resolution of the benefit. Although we believe that we have made adequate provisionsadequately provided for income taxes in determiningliabilities resulting from tax assessments by taxing authorities, positions taken by these tax authorities could have a material impact on our worldwide incomeeffective tax rate, results of operations, financial position for all yearsand/or cash flows.

As part of the Tax Cut and Jobs Act of 2017, we are subject to audit.a territorial tax system in which we are required to make an accounting policy in providing for tax on Global Intangible Low Taxed Income (GILTI) earned by certain foreign subsidiaries. We have elected to treat the impact of GILTI as a period cost and will be reported as a part of continuing operations.

New Accounting Pronouncements
SeeNote A – Significant Accounting Policies to our consolidated financial statements included in Item 8. Financial Statements and Supplementary Data of this Annual Report for additional information on standards implemented since December 31, 2017 and Note Q - New Accounting Pronouncements to our consolidated financial statements included in Item 88. Financial Statements and Supplementary Data of this Annual Report for additional information on Standards Implemented since December 31, 2015 and Standardsstandards to be Implemented.implemented.

Additional Information
Use of Non-GAAP Financial Measures by Boston Scientific

To supplement our consolidated financial statements presented on a GAAP basis, we disclose certain non-GAAP financial measures, including adjusted net income (earnings) and adjusted net income (earnings) per share that exclude certain amounts, and adjustedoperational net sales growth that exclude the impact of sales from divested businesses and/or changes in foreign currency exchange rates.fluctuations and adjusted free cash flow that excludes certain amounts. These non-GAAP financial measures are not in accordance with generally accepted accounting principles in the United States.States and should not be considered in isolation from or as a replacement for the most directly comparable GAAP financial measures. Further, other companies may calculate these non-GAAP financial measures differently than we do, which may limit the usefulness of those measures for comparative purposes.


To calculate adjusted net income (earnings) and adjusted net income (earnings) per share we exclude certain charges (credits) from GAAP net income as detailed below. Amounts are presented after-tax using our effective tax rate, unless the amount is a significant unusual or infrequently occurring item in accordance with FASB ASC section 740-270-30, "General Methodology and Use of Estimated Annual Effective Tax Rate." The GAAP financial measure most directly comparable to adjusted net income is GAAP net income (loss) and the GAAP financial measure most directly comparable to adjusted net income per share is GAAP net income (loss) per share.

To calculate adjustedoperational net sales, thatwhich exclude sales from divested businesses and/or changes inthe impact of foreign currency exchange rates,fluctuations, we convert actual net sales from local currency to U.S. dollars using constant foreign currency exchange rates in the current and prior period and/or eliminate the net sales from businesses that were divested during the period.periods. The GAAP financial measure most directly comparable to constant currencyoperational growth rate and/or growth rates excluding sales from divested businesspercentages is growth rate percentages using net sales on a GAAP basis.

To calculate adjusted free cash flow, we exclude the cash component of certain charges (credits) that are also excluded from adjusted net income (earnings) as well as any cash tax benefits of such charges, as detailed below. In addition, we exclude tax settlements payments that relate to prior periods. The GAAP measure that is most directly comparable to adjusted free cash flow is free cash flow on a GAAP basis. Free cash flow on a GAAP basis is calculated by subtracting net purchases of property, plant and equipment from cash provided by operating activities.

Reconciliations of each of these non-GAAP financial measures to the corresponding GAAP financial measure are included in the relevant sections of this Annual Report.

Management uses these supplemental non-GAAP financial measures to evaluate performance period over period, to analyze the underlying trends in our business, to assess our performance relative to our competitors and to establish operational goals and forecasts that are used in allocating resources. In addition, management uses these non-GAAP financial measures to further its understanding of the performance of our operating segments. The adjustments excluded from our non-GAAP financial measures are consistent with those excluded from our operating segments’ measures of net sales and profit or loss. These adjustments are excluded from the segment measures that are reported to our chief operating decision maker that are used to make operating decisions and assess performance.

We believe that presenting adjusted net income, adjusted net income per share and adjusted net sales that exclude certain amounts, such asoperational net sales from divested businesses and/orgrowth that exclude the impact of changes in foreign currency exchange rates, and adjusted free cash flow that excludes certain amounts, in addition to the corresponding GAAP financial measures, provides investors greater transparency to the information used by management for its operational decision-making and allows investors to see our results “through the eyes” of management. We further believe that providing this information assists our investors in understanding our operating performance and the methodology used by management to evaluate and measure such performance.

The following is an explanation of each of the adjustments that management excluded as part of these non-GAAP financial measures as well as reasons for excluding each of these individual items:items. In each case, management has excluded the item for purposes of calculating the relevant non-GAAP financial measure to facilitate an evaluation of our current operating performance and a comparison to our past operating performance:

Adjusted Net Income, and Adjusted Net Income per Share and Adjusted Free Cash Flow

Amortization expense - We record intangible assets at historical cost and amortize them over their estimated useful lives. Amortization expense is excluded from management's assessment of operating performance and is also excluded from our operating segments' measures of profit and loss used for making operating decisions and assessing performance.


Intangible asset impairment charges - This amount represents write-downs of certain intangible asset balances during 2016, 20152018, 2017 and 2014.We2016.We review intangible assets subject to amortization quarterly to determine if any adverse conditions exist or a change in circumstances has occurred that would indicate impairment and test our indefinite-lived intangible assets at least annually for impairment. If we determine the carrying value of the amortizable intangible asset is not recoverable or we conclude that it is more likely than not that the indefinite-live asset is impaired, we will write the carrying value down to fair value in the period identified. We exclude the impact of impairmentImpairment charges are excluded from management's assessment of operating performance and from our operating segments' measures of profit and loss used for making operating decisions and assessing performance. Accordingly, management has excluded intangible asset impairment charges for purposes of calculating these non-GAAP financial measures to facilitate an evaluation of our current operating performance and a comparison to our past operating performance.

Acquisition- and divestiture relatedAcquisition-related net charges (credits) -or payments- These adjustments may consist of (a) contingent consideration fair value adjustments; (b) gains on previously held investments; (c) purchased and/or funded in-process research and development expenses incurred outside of a business combination; (d) due diligence, otherdeal fees, inventory step-up amortization, and integration and exit costs;costs, other fees, and (e)accelerated compensation expense; and (d) separation costs and gains primarily associated with the sale of our Neurovasculara business in January 2011.or portion of a business. The contingent consideration adjustments represent accounting adjustments to state contingent consideration liabilities at their estimated fair value. These adjustments can be highly variable depending on the assessed likelihood and amount of future contingent consideration payments. Due diligence, otherdeal fees, inventory step-up amortization, and integration and exit costs include legal, tax, severance and other expenses associated with prior and potential future acquisitions and divestitures that can be highly variable and not representative of ongoing operations. Separation costs and gainsgains/losses on the sale of a business unit primarilywould represent those costs associated with the Neurovasculara divestiture and are not representative of ongoing operations. Accordingly, managementAcquisition-related net charges (credits) are excluded these amounts for purposesfrom management's assessment of calculating these non-GAAP financial measures to facilitate an evaluation of our current operating performance and a comparison tofrom our past operating segments' measures of profit and loss used for making operating decisions and assessing performance.

Restructuring and restructuring-related net charges (credits) or payments - These adjustments primarily represent severancecompensation-related charges, fixed asset write-offs, contract cancellations, project management fees and other direct costs associated with our restructuring plans. These restructuring plans each consist of distinct initiatives that are fundamentally different from our ongoing, core cost reduction initiatives in terms of, among other things, the frequency with which each action is performed and the required planning, resourcing, cost and timing. Examples of such initiatives include the movement of business activities, facility consolidations and closures and the transfer of product lines

between manufacturing facilities, which, due to the highly regulated nature of our industry, requires a significant investment in time and cost to create duplicate manufacturing lines, run product validations and seek regulatory approvals. Restructuring initiatives generally take approximately two years to completeplace over a defined timeframe and have a distinct project timeline that begins subsequent to approval by our Board of Directors. In contrast to our ongoing cost reduction initiatives, restructuring initiatives typically result in duplicative cost and exit costs over this period of time, are one-time shut downs or transfers and are not considered part of our core, ongoing operations. Because theseThese restructuring plans are incremental to the core activities that arise in the ordinary course of our business, managementbusiness. Restructuring and restructuring-related net charges (credits) are excluded these costs for purposesfrom management's assessment of calculating these non-GAAP financial measures to facilitate an evaluation of our current operating performance and a comparison tofrom our past operating segments' measures of profit and loss used for making operating decisions and assessing performance.

Litigation-related net charges (credits) or payments - These adjustments include certain significant product liability and other litigation-related charges and credits. We record these charges and credits, which we consider to be unusual or infrequent and significant, within the litigation-related charges line in our consolidated statementstatements of operations; all other legal and product liability charges, credits and costs are recorded within selling general and administrative expenses. These amountsLitigation-related net charges (credits) are excluded by management in assessing ourfrom management's assessment of operating performance as well asand from our operating segments' measures of profit and loss used for making operating decisions and assessing performance.

Investment impairment charges - These amounts represent write-downs relating to our investment portfolio that are considered unusual or infrequent and significant. Each reporting period, we evaluate our investments to determine if there are any events or circumstances that are likely to have a significant adverse effect on the fair value of the investment. If we identify an impairment indicator, we will estimate the fair value of the investment and compare it to its carrying value and determine if the impairment is other-than-temporary. For other-than-temporary impairments, we recognize an impairment loss equal to the difference between an investment’s carrying value and its fair value. Certain investment impairment charges are excluded from management's assessment of operating performance and from our operating segments' measures of profit and loss used for making operating decisions and assessing performance.

Discrete tax items - These items represent adjustments of certain tax positions including those which a) are related to the finalization of the enactment date impact of the TCJA, and, or b) were a benefit resulting from the finalization of the IRS Stipulation of Settled Issues consistent with the manner in which the tax reserves were originally booked. These adjustments are not indicative of expected ongoing operating results. Certain discrete tax items are excluded

from management's assessment of operating performance and from our operating segments' measures of profit and loss used for making operating decisions and assessing performance.

Operational Net Sales Excluding the Impact of Foreign Currency Fluctuations

The impact of foreign currency fluctuations is highly variable and difficult to predict. Accordingly, management excluded these amountsmay exclude the impact of foreign currency fluctuations for purposes of calculating these non-GAAP financial measuresreviewing the net sales and growth rates to facilitate an evaluation of our current operating performance and a comparison to our past operating performance.

Debt extinguishment charges - This item represents premiums, accelerated amortization of debt issuance costs and investor discount costs net of interest rate hedge gains related to the early extinguishment of $1.0 billion of senior notes during the second quarter of 2015. These adjustments are not expected to recur and do not reflect expected ongoing operating results. Accordingly, management excluded these amounts for purposes of calculating these non-GAAP financial measures to facilitate an evaluation of our current operating performance and a comparison to our past operating performance.

Pension termination charges - This item represents charges associated with the termination of the Guidant Retirement Plan, a frozen defined benefit plan. These charges are not expected to recur after 2015 and do not reflect expected ongoing operating results. Accordingly, management has excluded these amounts for purposes of calculating these non-GAAP financial measures to facilitate an evaluation of our current operating performance and a comparison to our past operating performance.

Amortization expense - We record intangible assets at historical cost and amortize them over their estimated useful lives. Amortization expense is excluded from management's assessment of operating performance and is also excluded from our operating segments' measures of profit and loss used for making operating decisions and assessing performance. Accordingly, management has excluded amortization expense for purposes of calculating these non-GAAP financial measures to facilitate an evaluation of our current operating performance and a comparison to our past operating performance.

Discrete tax items - These items represent adjustments of certain tax positions, which were initially established in prior periods in conjunction with the purchase accounting for an acquisition or as a result of intangible asset impairment charges; acquisition-, divestiture-, restructuring- or litigation-related charges or credits. These adjustments do not reflect expected on-going operating results. Accordingly, management excluded these amounts for purposes of calculating these non-GAAP financial measures to facilitate an evaluation of our current operating performance and a comparison to our past operating performance.

Adjusted Net Sales Excluding the Impact of Sales from Divested Businesses and/or Changes in Foreign Currency Exchange Rates

Sales from divested businesses are primarily associated with the Neurovascular divestiture and are not representative of ongoing operations. The impact of changes in foreign currency exchange rates is highly variable and difficult to predict. Accordingly, management excludes the impact of sales from divested businesses and/or changes in foreign currency exchange rates for purposes of reviewing adjusted net sales to facilitate an evaluation of our current operating performance and a comparison to our past operating performance.

Adjusted net income, adjusted net income per share and adjusted net sales that exclude certain amounts, such as the sales from divested businesses and/or the impact of changes in foreign currency exchange rates, are not in accordance with U.S. GAAP and should not be considered in isolation from or as a replacement for the most directly comparable GAAP financial measures. Further, other companies may calculate these non-GAAP financial measures differently than we do, which may limit the usefulness of those measures for comparative purposes.

Rule 10b5-1 Trading Plans by Executive Officers

Periodically, certain of our executive officers adopt written stock trading plans in accordance with Rule 10b5-1 under the Exchange Act and our own Stock Trading Policy. A Rule 10b5-1 Trading Plan is a written document that pre-establishes the amount, prices and dates (or formulas for determining the amounts, prices and dates) of future purchases or sales of our stock, including shares issued upon exercise of stock options or vesting of deferred stock units. These plans are entered into at a time when the person is not in possession of material non-public information about our company. We disclose details regarding individual Rule 10b5-1 Trading Plans on the Investor Relations section of our website.


Management’s Annual Report on Internal Control over Financial Reporting
As the management of Boston Scientific Corporation, we are responsible for establishing and maintaining adequate internal control over financial reporting. We designed our internal control process to provide reasonable assurance to management and the Board of Directors regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.
We assessed the effectiveness of our internal control over financial reporting as of December 31, 2016.2018. In making this assessment, we used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control–Integrated Framework (2013 framework). Based on our assessment, we believe that, as of December 31, 2016,2018, our internal control over financial reporting is effective at a reasonable assurance level based on these criteria.
Ernst & Young LLP, an independent registered public accounting firm, has issued an audit report on the effectiveness of our internal control over financial reporting. This report, in which they expressed an unqualified opinion, is included below.

       
 /s/ Michael F. Mahoney /s/ Daniel J. Brennan 
     
  Michael F. Mahoney  Daniel J. Brennan 
  President and Chief Executive Officer  
Executive Vice President and Chief
Financial Officer
 


Report of Independent Registered Public Accounting Firm

TheTo the Board of Directors and ShareholdersStockholders of Boston Scientific Corporation

Opinion on Internal Control over Financial Reporting

We have audited Boston Scientific Corporation’s internal control over financial reporting as of December 31, 20162018, based on criteria established in Internal Control---IntegratedControl-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission 2013 framework(2013 framework) (the COSO criteria). In our opinion, Boston Scientific Corporation’sCorporation (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the 2018 consolidated financial statements of the Company and our report dated February 19, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the company’sCompany’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States).PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Boston Scientific Corporation maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Boston Scientific Corporation as of December 31, 2016 and 2015, and the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2016 of Boston Scientific Corporation and our report dated February 23, 2017 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Boston, Massachusetts
February 23, 201719, 2019

ITEM 7A.        QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We develop, manufacture and sell medical devices globally and our earnings and cash flows are exposed to market risk from changes in currency exchange rates and interest rates. We address these risks through a risk management program that includes the use of derivative financial instruments. We operate the program pursuant to documented corporate risk management policies. We do not enter derivative transactions for speculative purposes. Gains and losses on derivative financial instruments substantially offset losses and gains on underlying hedged exposures. Furthermore, we manage our exposure to counterparty risk on derivative instruments by entering into contracts with a diversified group of major financial institutions and by actively monitoring outstanding positions.

Our currency risk consists primarily of foreign currency denominated firm commitments, forecasted foreign currency denominated intercompany and third-party transactions and net investments in certain subsidiaries. We use both nonderivative (primarily European manufacturing operations) and derivative instruments to manage our earnings and cash flow exposure to changes in currency exchange rates. We had currency derivative instruments outstanding in the contract amount of $4.100$11.326 billion as of December 31, 20162018 and $3.547$5.923 billion as of December 31, 2015. We recorded $199 million of other assets and $26 million of other liabilities to recognize the fair value of these derivative instruments as of December 31, 2016, as compared to $237 million of other assets and $23 million of other liabilities as of December 31, 2015.2017. A ten percent appreciation in the U.S. dollar’s value relative to the hedged currencies would increase the derivative instruments’ fair value by $257$181 million as of December 31, 2016 and $1552018 as compared to $321 million as of December 31, 2015.2017. A ten percent depreciation in the U.S. dollar’s value relative to the hedged currencies would decrease the derivative instruments’ fair value by $223$222 million as of December 31, 2016 and by $1892018 as compared to $421 million as of December 31, 2015.2017. Any increase or decrease in the fair value of our currency exchange rate sensitive derivative instruments would be substantially offset by a corresponding decrease or increase in the fair value of the hedged underlying asset, liability or forecasted transaction, resulting in minimal impact on our consolidated statements of operations.

Our interest rate risk relates primarily to U.S. dollar borrowings partially offset by U.S. dollar cash investments. We have historically used interest rate derivative instruments to manage our earnings and cash flow exposure to changes in interest rates. We havehad interest rate derivative instruments outstanding in the contract amount of $1.000 billion as of December 31, 2018 and no interest rate derivative instruments outstanding as of December 31, 2016.2017. As of December 31, 2016, $4.6702018, $4.800 billion of our outstanding debt obligations was at fixed interest rates, representing approximately 8568 percent of our total debt.

Certain of our non-designated forward currency contracts outstanding as of December 31, 2018, relate to hedging a portion of the purchase price of the proposed BTG Acquisition ($2.550 billion notional value as of December 31, 2018). During the first quarter of 2019, we entered into additional non-designated forward currency contracts, after which our combined notional value is £3.311 billion, which represents the full purchase price for the proposed BTG Acquisition.

See Note ED Hedging Activities and Fair Value Measurements to our 2016 consolidated financial statements contained in Item 88. Financial Statements and Supplementary Data of this Annual Report for further information regarding our derivative financial instruments.

Report of Independent Registered Public Accounting Firm

TheTo the Board of Directors and ShareholdersStockholders of Boston Scientific Corporation

Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Boston Scientific Corporation (the Company) as of December 31, 20162018 and 2015, and2017, the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2016. Our audits also included2018, and the related notes and financial statement schedule listed in the Index at Item 15(a)2. These (collectively referred to as the "consolidated financial statements and schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States)statements"). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of Boston Scientific Corporationthe Company at December 31, 20162018 and 2015,2017, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2016,2018, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), Boston Scientific Corporation’sthe Company’s internal control over financial reporting as of December 31, 2016,2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 23, 201719, 2019 expressed an unqualified opinion thereon.

Adoption of ASU No. 2014-09

As discussed in Note A to the consolidated financial statements, the Company changed its method for recognizing revenue as a result of the adoption of Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606), and the amendments in ASUs 2015-14, 2016-08, 2016-10 and 2016-12 effective January 1, 2018.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.


/s/ Ernst & Young LLP

We have served as the Company’s auditor since 1992.
Boston, Massachusetts
February 23, 201719, 2019



ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

BOSTON SCIENTIFIC CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS

Year Ended December 31,Year Ended December 31,
in millions, except per share data201620152014
  
(in millions, except per share data)2018 2017 2016
Net sales$8,386
$7,477
$7,380
$9,823
 $9,048
 $8,386
Cost of products sold2,424
2,173
2,210
2,813
 2,593
 2,424
Gross profit5,962
5,304
5,170
7,011
 6,455
 5,962
      
Operating expenses:      
Selling, general and administrative expenses3,099
2,873
2,902
3,569
 3,294
 3,099
Research and development expenses920
876
817
1,113
 997
 920
Royalty expense79
70
111
70
 68
 79
Amortization expense545
495
438
599
 565
 545
Intangible asset impairment charges11
19
195
35
 4
 11
Contingent consideration expense (benefit)29
123
(85)(21) (80) 29
Restructuring charges28
26
69
Litigation-related charges804
1,105
1,036
Pension termination charges
44

Gain on divestiture

(12)
Restructuring charges (credits)36
 37
 28
Litigation-related charges (credits)103
 285
 804
5,515
5,631
5,471
5,504
 5,170
 5,515
Operating income (loss)447
(327)(301)1,506
 1,285
 447
      
Other income (expense):      
Interest expense(233)(284)(216)(241) (229) (233)
Other, net(37)(39)8
156
 (124) (37)
Income (loss) before income taxes177
(650)(509)1,422
 933
 177
Income tax (benefit) expense(170)(411)(390)(249) 828
 (170)
Net income (loss)$347
$(239)$(119)$1,671
 $104
 $347
      
Net income (loss) per common share — basic$0.26
$(0.18)$(0.09)$1.21
 $0.08
 $0.26
Net income (loss) per common share — assuming dilution$0.25
$(0.18)$(0.09)$1.19
 $0.08
 $0.25
      
Weighted-average shares outstanding      
Basic1,357.6
1,341.2
1,324.3
1,381.0
 1,370.1
 1,357.6
Assuming dilution1,377.2
1,341.2
1,324.3
1,401.4
 1,392.7
 1,377.2














See notes to the consolidated financial statements.

BOSTON SCIENTIFIC CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

 Year Ended December 31,Year Ended December 31,
(in millions) 2016 2015 20142018 2017 2016
Net income (loss) $347
 $(239) $(119)$1,671
 $104
 $347
Other comprehensive income (loss), net of tax:           
Foreign currency translation adjustment (25) (16) (22)(21) 48
 (25)
Net change in unrealized gains and losses on derivative financial instruments, net of tax (45) (67) 78
Net change in derivative financial instruments110
 (106) (45)
Net change in available-for-sale securities (6) 
 

 5
 (6)
Net change in unrealized costs associated with certain retirement plans (11) 27
 (18)
Net change in defined benefit pensions and other items2
 (6) (11)
Total other comprehensive income (loss) (87) (56) 38
91
 (59) (87)
Total comprehensive income (loss) $260
 $(295) $(81)$1,761
 $45
 $260




















































See notes to the consolidated financial statements.

BOSTON SCIENTIFIC CORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS

As of December 31,As of December 31,
in millions, except share and per share data2016 2015
   
(in millions, except share and per share data)2018 2017
ASSETS      
Current assets:      
Cash and cash equivalents$196
 $319
$146
 $188
Trade accounts receivable, net1,472
 1,275
1,608
 1,548
Inventories955
 1,016
1,166
 1,078
Deferred and prepaid income taxes75
 496
Prepaid income taxes161
 66
Other current assets541
 365
921
 942
Total current assets3,239
 3,471
4,003
 3,822
Property, plant and equipment, net1,630
 1,490
1,782
 1,697
Goodwill6,678
 6,473
7,911
 6,998
Other intangible assets, net5,883
 6,194
6,372
 5,837
Other long-term assets666
 505
932
 688
TOTAL ASSETS$18,096
 $18,133
$20,999
 $19,042
      
LIABILITIES AND STOCKHOLDERS’ EQUITY      
Current liabilities:      
Current debt obligations$64
 $3
$2,253
 $1,801
Accounts payable447
 209
349
 530
Accrued expenses2,312
 1,970
2,246
 2,456
Other current liabilities764
 248
412
 867
Total current liabilities3,587
 2,430
5,260
 5,654
Long-term debt5,420
 5,674
4,803
 3,815
Deferred income taxes18
 735
328
 191
Other long-term liabilities2,338
 2,974
1,882
 2,370
      
Commitments and contingencies
 

 
      
Stockholders’ equity:      
Preferred stock, $0.01 par value - authorized 50,000,000 shares, none issued and outstanding
 


 

Common stock, $0.01 par value - authorized 2,000,000,000 shares; issued 1,609,670,817 shares as of December 31, 2016 and 1,594,213,786 shares as of December 31, 201516
 16
Treasury stock, at cost - 247,566,270 shares as of December 31, 2016 and December 31, 2015(1,717) (1,717)
Common stock, $0.01 par value - authorized 2,000,000,000 shares; issued 1,632,148,030 shares as of December 31, 2018 and 1,621,062,898 shares as of December 31, 201716
 16
Treasury stock, at cost - 247,566,270 shares as of December 31, 2018 and December 31, 2017(1,717) (1,717)
Additional paid-in capital17,014
 16,860
17,346
 17,161
Accumulated deficit(8,581) (8,927)(6,953) (8,390)
Accumulated other comprehensive income (loss), net of tax:      
Foreign currency translation adjustment(79) (54)(53) (32)
Unrealized gain on derivative financial instruments107
 152
Unrealized loss on available-for-sale securities(6) 
Unrealized costs associated with certain retirement plans(21) (10)
Unrealized gain (loss) on derivative financial instruments111
 1
Unrealized gain (loss) on available-for-sale securities
 (1)
Unrealized costs associated with defined benefit pensions and other items(25) (27)
Total stockholders’ equity6,733
 6,320
8,726
 7,012
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY$18,096
 $18,133
$20,999
 $19,042

See notes to the consolidated financial statements.

BOSTON SCIENTIFIC CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

            Accumulated
        Additional   Other
  Common Stock Treasury Paid-In Accumulated Comprehensive
in millions, except share data Shares Issued Par Value Stock Capital Deficit Income (Loss)
Balance as of December 31, 2013 1,560,302,634
 $16
 $(1,592) $16,579
 $(8,570) $106
Net loss         (119)  
Changes in other comprehensive income (loss), net of tax            
Foreign currency translation adjustment           (22)
Net change in derivative financial instruments           78
Net change in certain retirement plans           (18)
Impact of stock-based compensation plans, net of tax 14,715,602
 
   124
    
Acquisition of treasury stock     (125)      
Balance as of December 31, 2014 1,575,018,236
 $16
 $(1,717) $16,703
 $(8,689) $144
Net loss  
  
    
 (239)  
Changes in other comprehensive income (loss), net of tax  
  
    
    
Foreign currency translation adjustment  
  
    
  
 (16)
Net change in derivative financial instruments  
  
    
  
 (67)
Net change in certain retirement plans           27
Impact of stock-based compensation plans, net of tax 19,195,550
 
 

 157
  
  
Rounding         1
  
Balance as of December 31, 2015 1,594,213,786
 $16
 $(1,717) $16,860
 $(8,927) $88
             
Net income         347
  
Changes in other comprehensive income (loss), net of tax            
Foreign currency translation adjustment           (25)
Net change in derivative financial instruments           (45)
Net change in available-for-sale securities           (6)
Net change in certain retirement plans           (11)
Impact of stock-based compensation plans, net of tax 15,457,031
 

   153
  
  
Rounding   
   1
 (1) 

Balance as of December 31, 2016 1,609,670,817
 $16
 $(1,717) $17,014
 $(8,581) $1
     Treasury Stock Additional Paid-In Capital Accumulated Deficit Accumulated Other Comprehensive Income (Loss), Net of Tax
 Common Stock    
(in millions, except share data)Shares Issued Par Value    
Balance as of December 31, 20151,594,213,786
 $16
 $(1,717) $16,860
 $(8,927) $88
Net income (loss)        347
  
Changes in other comprehensive income (loss), net of tax:           
Foreign currency translation adjustment          (25)
Derivative financial instruments          (45)
Available-for-sale securities          (6)
Defined benefit pensions and other items          (11)
Impact of stock-based compensation plans, net of tax15,457,031
 
   153
    
Rounding    
 1
 (1)  
Balance as of December 31, 20161,609,670,817
 $16
 $(1,717) $17,014
 $(8,581) $1
Net income (loss) 
  
    
 104
  
Cumulative effect adjustment for ASU 2016-09        86
  
Changes in other comprehensive income (loss), net of tax: 
  
    
    
Foreign currency translation adjustment 
  
    
  
 48
Derivative financial instruments 
  
    
  
 (106)
Available-for-sale securities          5
Defined benefit pensions and other items          (6)
Impact of stock-based compensation plans, net of tax11,392,081
 

 

 147
  
  
Balance as of December 31, 20171,621,062,898
 $16
 $(1,717) $17,161
 $(8,390) $(59)
Net income (loss)        1,671
  
Cumulative effect adjustment for ASU Adoptions(1)
        (233)  
Changes in other comprehensive income (loss), net of tax:           
Foreign currency translation adjustment      
   (21)
Derivative financial instruments          110
Available-for-sale securities          
Defined benefit pensions and other items          2
Impact of stock-based compensation plans, net of tax11,085,132
 

   185
  
  
Balance as of December 31, 20181,632,148,030
 $16
 $(1,717) $17,346
 $(6,953) $33
(1) In 2018, we recorded a cumulative effect adjustment to Retained Earnings to reflect the adoption of ASU 2014-09, ASU 2016-16 and ASU 2016-01. Please refer to Note A – Significant Accounting Policies for additional details.

See notes to the consolidated financial statements.



BOSTON SCIENTIFIC CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
Year Ended December 31,Year Ended December 31,
in millions201620152014
(in millions)2018 2017 2016
Operating Activities      
Net income (loss)$347
$(239)$(119)$1,671
 $104
 $347
Adjustments to reconcile net income (loss) to cash provided by operating activities      
Gain on sale of businesses

(12)
Gain on sale of property, plant and equipment(11)

Depreciation and amortization815
769
725
894
 844
 815
Deferred and prepaid income taxes(305)(532)(397)(87) 245
 (305)
Stock-based compensation expense116
107
103
140
 127
 116
Intangible asset impairment charges11
19
195
35
 4
 11
Net losses (gains) on investments and notes receivable21
9
(27)
Net loss (gain) on investments and notes receivable(155) 92
 21
Contingent consideration expense (benefit)29
123
(85)(21) (80) 29
Payment of contingent consideration in excess of amounts established in purchase accounting(57)(57)(103)
Pension termination charges
44

Payment of contingent consideration in excess of amount recognized at acquisition(9) (14) (57)
Inventory step-up amortization22
36
9
6
 10
 22
Other, net(12)41
18
(3) 27
 (23)
Increase (decrease) in operating assets and liabilities, net of acquisitions:      
Trade accounts receivable(216)(17)53
(110) (30) (216)
Inventories40
3
(81)(83) (107) 40
Other assets(253)(23)(33)(172) (20) (43)
Accounts payable and accrued expenses553
(20)620
(631) 195
 553
Other liabilities(128)337
403
(1,164) 28
 (128)
Cash provided by operating activities972
600
1,269
 
Cash provided by (used for) operating activities310
 1,426
 1,182
Investing Activities      
Purchases of property, plant and equipment(376)(247)(259)(316) (319) (376)
Proceeds on disposals of property, plant and equipment29


14
 
 29
Payments for acquisitions of businesses, net of cash acquired(408)(1,734)(486)(1,448) (560) (408)
Proceeds from business divestitures, net of costs

12
Payments for investments and acquisitions of certain technologies(132)(266)(26)(172) (131) (132)
Proceeds from investments and collections of notes receivable
61
14
Cash used for investing activities(887)(2,186)(745)
 
Cash provided by (used for) investing activities(1,921) (1,010) (887)
Financing Activities      
Payments of contingent consideration amounts previously established in purchase accounting(65)(156)(34)
Proceeds from long-term borrowings, net of debt issuance costs
2,580

Payments on long-term borrowings(250)(1,150)
Payments of contingent consideration previously established in purchase accounting(19) (33) (65)
Proceeds from short-term borrowings, net of debt issuance costs999
 
 
Net increase (decrease) in commercial paper21
 1,183
 
Proceeds from borrowings on credit facilities630
565
810
569
 2,156
 630
Payments on borrowings from credit facilities(570)(565)(810)(569) (2,216) (570)
Payments for acquisitions of treasury stock

(125)
Payments on long-term borrowings(602) (1,000) (250)
Proceeds from long-term borrowings, net of debt issuance and extinguishment costs987
 
 
Cash used to net share settle employee equity awards(62)(66)(51)(56) (65) (62)
Proceeds from issuances of shares of common stock111
114
60
101
 85
 111
Cash provided by (used for) financing activities(206)1,322
(150)1,432
 110
 (206)
 
Effect of foreign exchange rates on cash(2)(4)(4)(8) 4
 (2)
 
Net increase (decrease) in cash and cash equivalents(123)(268)370
Cash and cash equivalents at beginning of period319
587
217
Cash and cash equivalents at end of period$196
$319
$587
 
Net increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents(188) 530
 87
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period1,017
 487
 400
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period$829
 $1,017
 $487
Supplemental Information      
Cash paid for income taxes, net$94
$80
$74
Cash (received) paid for income taxes, net$1,037
 $(42) $94
Cash paid for interest233
283
221
262
 235
 233
Fair value of contingent consideration recorded in purchase accounting50
63
3
248
 94
 50
     
As of December 31,
Reconciliation to amounts within the consolidated balance sheets:2018 2017 2016
Cash and cash equivalents$146
 $188
 $196
Restricted cash and restricted cash equivalents included in Other current assets
655
 803
 269
Restricted cash equivalents included in Other long-term assets
27
 26
 22
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period$829
 $1,017
 $487
See notes to the consolidated financial statements.


NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

NOTE A – SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

Our consolidated financial statements include the accounts of Boston Scientific Corporation and our wholly-owned subsidiaries, after the elimination of intercompany transactions. When used in this report, the terms "we," "us," "our" and "the Company" mean Boston Scientific Corporation and its divisions and subsidiaries. We assess the terms of our investment interests to determine if any of our investees meet the definition of a variable interest entity (VIE). For any VIEs, we perform an analysis to determine whether our variable interests give us a controlling financial interest in a VIE. The analysis identifies the primary beneficiary of a VIE as the enterprise that has both 1) the power to direct activities of a VIE that most significantly impact the entity’s economic performance and 2) the obligation to absorb losses of the entity or the right to receive benefits from the entity. Based on our assessments under the applicable guidance, we did not have controlling financial or operating interests in any VIEs and, therefore, did not consolidate any VIEs for 2016, 2015,2018, 2017 and 2014.

On January 3, 2011, we closed the sale of our Neurovascular business to Stryker Corporation (Stryker). Due to our continuing involvement in the operations of the Neurovascular business following the divestiture, the divestiture did not meet the criteria for presentation as a discontinued operation and, therefore, the results of the Neurovascular business were included in our results of operations for 2014. Refer to Note C – Divestitures for a description of this business divestiture.2016.

Basis of Presentation

The accompanying consolidated financial statements and notes thereto have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) and with the instructions to Form 10-K and Regulation S-X.

Additionally, certain prior yearAmounts reported in millions within this report are computed based on the amounts in thousands. As a result, the sum of the components reported in millions may not equal the total amount reported in millions due to rounding. Certain columns and rows within tables may not add due to the use of rounded numbers. Percentages presented are calculated from the underlying numbers in dollars. Balances in 2016 and 2015 balances relatedwere subject to debt issuance costs have been restatedrounding.

Revision of Reportable Segments

Effective January 1, 2018, following organizational changes to reflectalign the structure of our adoption ofbusiness with our focus on active implantable devices, we revised our reportable segments, in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification Update No. 2015-03,(ASC) Topic 280, Interest-ImputationSegment Reporting. The revision reflects a reclassification of Interest (Subtopic 835-30): Simplifyingour Neuromodulation business from our Medical Surgical (MedSurg) segment to our newly created Rhythm and Neuro segment. We have revised prior year amounts to conform to the Presentationcurrent year’s presentation (as denoted with an asterisk (*) throughout). There was no revision to operating segments or reporting units as a result of Debt Issuance Costs.  Amounts reclassified from other long-term assets to long-term debt were not material. Refer tothe organizational change. See Note QC - New Accounting PronouncementsGoodwill and Other Intangible Assets and Note N - Segment Reporting for additional information on our adoption of the accounting pronouncement.further details.

Subsequent Events

We evaluate events occurring after the date of our accompanying consolidated balance sheets for potential recognition or disclosure in our consolidated financial statements. We did not identify any material subsequent events requiring adjustment to our accompanying consolidated financial statements (recognized subsequent events). Those items requiring disclosure (unrecognized subsequent events) in the consolidated financial statements have been disclosed accordingly. Refer to Note FBBorrowingsAcquisitions and Credit ArrangementsStrategic Investments, Note D – Hedging Activities and Fair Value Measurements and Note KJ – Commitments and Contingencies for further details. In addition, in February 2017, we initiated a voluntary removal of all Lotus™ Valve devices, including Lotus with Depth Guard™, from global commercial and clinical sites due to reports of premature release of a pin connecting the Lotus Valve to the delivery system.

Accounting Estimates

To prepare our consolidated financial statements in accordance with U.S. GAAP, management makes estimates and assumptions that may affect the reported amounts of our assets and liabilities, the disclosure of contingent liabilities as of the date of our consolidated financial statements and the reported amounts of our revenues and expenses during the reporting period. Our actual results may differ from these estimates. Refer to Critical Accounting Estimates included in Item 77. Management's Discussion and Analysis of Financial Condition and Results of Operations of this Annual Report for further discussion.

Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents

Cash and Cash Equivalents

We record cashCash and cash equivalents in our consolidated balance sheets at cost, which approximates fair value. Our policy is to invest excess cash in short-term marketable securities earning a market rate of interest without assuming undue risk toof loss of principal amounts invested and we limit our direct exposure to securities in any one industry or issuer. We consider to be cash equivalents all highly liquid investments purchasedshort-term marketable securities with a remaining days to maturity of three months90 days or less from the purchase date that can be readily converted to cash.

Restricted Cash and Restricted Cash Equivalents

Amounts included in restricted cash represent cash on hand required to be set aside by a contractual agreement related to receivable factoring arrangements and deferred compensation plans and are included in the Other current assets caption on our consolidated balance sheets. Generally, the restrictions related to the factoring arrangements lapse at the time we remit the customer payments collected by us as servicer of acquisitionpreviously sold customer receivables to bethe purchaser. Restrictions for deferred compensation lapse when amounts are paid to the employee. Restricted cash equivalents.

equivalents primarily represent amounts paid into various qualified settlement funds related to our ongoing transvaginal surgical mesh litigation and current amounts related to our non-qualified pension plan and are included in the We record available-for-sale investmentsOther current assets caption on our consolidated balance sheets. The restrictions related to the various qualified settlement funds will lapse as we approve amounts payable to claimants, at fair valuewhich time we no longer have rights to a return of the amounts paid into the various qualified settlement funds. Restricted cash equivalents included in the Other long-term assets caption on our consolidated balance sheets are related to the long-term portion of our non-qualified pension plan and exclude unrealized gains and temporary losses on available-for-sale securities from earnings, reporting such gains and losses, net of tax, as a separate component of stockholders’ equity, until realized. We compute realized gains and losses on sales of available-for-sale securities based on the average cost method, adjusted for any other-than-temporary declines in fair value. Refer to Investments in Publicly Traded and Privately Held Entitiesbelow for additional details.deferred compensation plans.

Concentrations of Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash and cash equivalents, derivative financial instrument contractsinstruments and accounts and notes receivable. Our investment policy limits exposure to concentrations of credit risk and changes in market conditions. Counterparties to financial instruments expose us to credit-related losses in the event of nonperformance. We transact our financial instruments with a diversified group of major financial institutions with investment grade credit ratings and actively monitor their credit ratings and our outstanding positions to limit our credit exposure. We provide credit, inIn the normal course, of business, toour payment terms with customers, including hospitals, healthcare agencies, clinics, doctors' offices and other private and governmental institutions, are typically 30 days in the U.S. but may be longer in international markets and generally do not require collateral. We record our accountsAccounts receivable in our consolidated balance sheets at net realizable value. We perform on-goingongoing credit evaluations of our customers and maintain allowances for potential credit losses, based on historical information and management's best estimates. AmountsWe write-off amounts determined to be uncollectible are written off against this reserve. We recorded write-offsWrite-offs of uncollectible accounts receivable of $11 millionwere immaterial in 2016, $16 million in 2015,2018, 2017 and $15 million in 2014.2016. We are not dependent on any single institution, and no single customer accounted for more than ten percent of our net sales in 2016, 2015,2018, 2017 and 2014 or accounts receivable at December 31, 2016 or 2015;2016; however, large group purchasing organizations, hospital networks and other buying groups have become increasingly important to our business and represent a substantial portion of our U.S. net sales.

We closely monitor outstanding receivables for potential collection risks, including those that may arise from economic conditions, in both the U.S. and international economies. Our European sales to government-owned or supported customers in Southern Europe, specifically Greece, Italy, Spain and Portugal are subject to an increased number of days outstanding relative to other countries prior to payment. Historically, receivable balances with certain publicly-owned hospitals in these countries accumulateaccumulated over a period of time and are then subsequently settled as large lump sum payments. While we believe our allowance for doubtful accounts in these countries is adequate as of December 31, 2016,2018 and 2017, if significant changes were to occur in the payment practices of these European governments or if government funding becomes unavailable, we may not be able to collect on receivables due to us from these customers, and our write-offs of uncollectible amountsaccounts receivable may increase.
 
Revenue Recognition

ASC Update No. 2014-09

In May 2014, the FASB issued FASB ASC Topic 606, Revenue from Contracts with Customers (Topic 606), which was subsequently updated. We generateadopted the standard as of January 1, 2018, using the modified retrospective method. Under this method, we applied FASB ASC Topic 606 to contracts that were not complete as of January 1, 2018 and recognized the cumulative effect of initially applying the standard as an adjustment to the opening balance of retained earnings. Results for reporting periods beginning after

January 1, 2018 are presented in accordance with FASB ASC Topic 606. Prior period amounts are not adjusted and are reported in accordance with legacy GAAP requirements in FASB ASC Topic 605, Revenue Recognition.

Due to the adoption of FASB ASC Topic 606, we recorded a net reduction to retained earnings of $177 million on January 1, 2018, primarily related to the cost of providing non-contractual post-implant support to certain customers, which we historically deemed immaterial in the context of the arrangement. Upon the adoption of FASB ASC Topic 606, when we sell a device with an implied non-contractual post-implant support obligation, we forward accrue the cost of the service within Selling, general and administrative expenses and recognize it at the point in time the associated revenue primarily fromis earned. We release the saleaccrual over the related service period. These costs were previously expensed as incurred due to such service obligation being non-contractual.

The impact of single-use medical devices, and present revenue net of sales taxes inadopting FASB ASC Topic 606 on our consolidated statementsbalance sheets resulted in an increase in Other current liabilities of $59 million and an increase in Other long-term liabilities of $205 million as of December 31, 2018, as a result of accruing for our post-implant support obligation. We also recorded deferred tax assets primarily related to post-implant support, resulting in an increase in Other long-term assets of $12 million and a reduction in Deferred income taxes of $41 million as of December 31, 2018. The remaining impact of adopting FASB ASC Topic 606 was not material to our financial position or results of operations.

We sell our products primarily through a direct sales force. In certain international markets, we sell our products through independent distributors. We consider revenue to be realized or realizable and earned when all of the following criteria are met: persuasive evidence of

We have a sales arrangement exists; delivery has occurredcontract with a customer that creates enforceable rights and obligations,
Promised products or services are identified,
The transaction price, or the amount we expect to receive, is determinable and
We have been rendered;transferred control of the pricepromised items to the customer.

Transfer of control is fixed or determinable; and collectability is reasonably assured. Revenue is recognizedevidenced upon passage of title and risk of loss to customers,the customer unless we are required to provide additional services,services. We treat shipping and provided we can form an estimate for sales returns.handling costs performed after a customer obtains control of the good as a fulfillment cost and record these costs as a selling expense when incurred. We recognize revenue from consignment arrangements based on product usage, or implant, which indicates that the sale is complete. ForWe recognize a receivable at the point in time we have an unconditional right to payment. Payment terms are typically 30 days in the U.S. but may be longer in international markets.

Deferred Revenue

We record a contract liability, or deferred revenue, arrangements with multiple deliverables, wherewhen we have an obligation to provide a product or service to the salecustomer and payment is received or due in advance of our performance. When we sell a device is combined with a future service obligation, we defer revenue on the undelivered elementunfulfilled performance obligation and recognize this revenue over the related service period. Many of our Cardiac Rhythm Management (CRM) product offerings combine the sale of a device with our LATITUDE™ Patient Management System, which represents a future service obligation. Generally, we do not have vendor specific objectiveobservable evidence of the standalone selling price available related to our future service obligations; therefore, we determine our estimates ofestimate the selling price using third party evidence when available; otherwise, we use our best estimate of selling price.an expected cost plus a margin approach. We allocate arrangement considerationthe transaction price using the relative standalone selling price method. The use of alternative estimates could result in a different amount of revenue deferral.

Contract liabilities are classified within Other current liabilities and Other long-term liabilities on our accompanying consolidated balance sheets. Our contractual liabilities are primarily composed of deferred revenue related to the LATITUDE Patient Management System. Revenue is recognized over the average service period which is based on device and patient longevity. We have elected not to disclose the transaction price allocated to unsatisfied performance obligations when the original expected contract duration is one year or less. In addition, we have not identified material unfulfilled performance obligations for which revenue is not currently deferred.

Variable Consideration

We generally allow our customers to return defective, damaged and, in certain cases, expired products for credit. We base our estimate for sales returns upon historical trends and record the amount as a reduction to revenue when we sell the initial product. In addition, we may allow customers to return previously purchased products for next-generation product offerings. For these transactions, we defer recognition of revenue on the sale of the earlier generation product based upon an estimate of the amount of product to be returned when the next-generation products are shipped to the customer. Uncertain timing of next-generation product approvals, variability in product launch strategies, product recalls and variation in product utilization all affect our estimates related to sales returns and could cause actual returns to differ from these estimates.


We also offer sales rebates and discounts to certain customers. We treat sales rebates and discounts as a reduction of revenue and classify the corresponding liability as current. We estimate rebates for products where there is sufficient historical information available to predict the volume of expected future rebates. If we are unable to reasonably estimate the expected rebates, reasonably, we record a liability for the maximum rebate percentage offered. We have entered certain agreements with group purchasing organizations to sell our products to participating hospitals at negotiated prices. We recognize revenue from these agreements following the same revenue recognition criteria discussed above.

Capitalized Contract Costs

We capitalize commission fees related to contracts with customers when the associated revenue is expected to be earned over a period that exceeds one year. Deferred commissions are primarily related to the sale of devices enabled with our LATITUDE™ Patient Management System. We have elected to expense commission costs when incurred for contracts with an expected duration of one year or less. Capitalized commission fees are amortized over the period the associated products or services are transferred. Similarly, we capitalize certain recoverable costs related to the delivery of the LATITUDE Remote Monitoring Service. These fulfillment costs are amortized over the average service period. Our total capitalized contract costs are immaterial to our consolidated financial statements.

Post Implant Services

We provide non-contractual services to customers to ensure the safe and effective use of certain implanted devices. Since our modified retrospective adoption of FASB ASC Topic 606 on January 1, 2018, because the revenue related to the immaterial services is recognized before they are delivered, we forward accrue the costs to provide these services at the time the devices are sold. We record these costs to Selling, general and administrative expenses. We estimate the amount of time spent by our representatives performing these services and their compensation throughout the device life to determine the service cost. Changes to our business practice or the use of alternative estimates could result in a different amount of accrued cost.

Warranty Obligations

We offer warranties on certain of our product offerings. The majority of our warranty liability relates to implantable devices offered by our CRM business, which include defibrillator and pacemaker systems. Our CRM products come with a standard limited warranty covering the replacement of these devices. We offer a full warranty for a portion of the period post-implant and a partial warranty for a period of time thereafter. We estimate the costs that we may incur under our warranty programs based on the number of units sold, historical and anticipated rates of warranty claims and cost per claim and record a liability equal to these estimated costs as cost of products sold at the time the product sale occurs. We assess the adequacy of our recorded warranty liabilities on a quarterly basis and adjust these amounts as necessary.

Changes Aggregate year over year changes in our product warranty accrual during 2018, 2017 and 2016 2015, and 2014 consisted of the following (in millions):

  Year Ended December 31,
  2016 2015 2014
Beginning balance $23
 $25
 $28
Provision 25
 15
 9
Settlements/ reversals (26) (17) (12)
Ending balance $22
 $23
 $25
were immaterial.

Inventories

We state inventories at the lower of first-in, first-out cost or market.net realizable value. We base our provisions for excess, expired and obsolete inventory primarily on our estimates of forecasted net sales. A significant change in the timing or level of demand for our products as compared to forecasted amounts may result in recording additional provisions for excess, expired and obsolete inventory in the future. Further, the industry in which we participate is characterized by rapid product development and frequent new product introductions. Uncertain timing of next-generation product approvals, variability in product launch strategies, product recalls and variation in product utilization all affect our estimates related to excess, expired and obsolete inventory. Approximately 40 percent of our finished goods inventory as of both December 31, 20162018 and December 31, 20152017 was at customer locations pursuant to consignment arrangements or held by sales representatives.

Property, Plant and Equipment

We state property, plant, equipment and leasehold improvements at historical cost. We charge expenditures for maintenance and repairs to expense and capitalize additions and improvements that extend the life of the underlying asset. We provide for depreciation using the straight-line method at rates that approximate the estimated useful lives of the assets. We depreciate buildings over a 20 tomaximum life of 40 year life;years; building improvements over the remaining useful life of the building structure; equipment, furniture and fixtures over a three to tenseven year life; and leasehold improvements over the shorter of the useful life of the improvement or the term of the related lease. Depreciation expense was $270 million in 2016, $274 million in 2015 and $287 million in 2014.


Valuation of Business Combinations

We allocate the amounts we pay for each acquisition to the assets we acquire and liabilities we assume based on their fair values at the datesdate of acquisition, including identifiable intangible assets and in-process research and development (IPR&D), which either arise from a contractual or legal right or are separable from goodwill. We base the fair value of identifiable intangible assets acquired in a business combination, including in-process research and development,IPR&D, on detailed valuations that use information and assumptions provided by management, which consider management’s best estimates of inputs and assumptions that a market participant would use. We allocate to goodwill any excess purchase price over the fair value of the net tangible and identifiable intangible assets acquired to goodwill.acquired. Transaction costs associated with these acquisitions are expensed as incurred through selling,Selling, general and administrative costs.expenses.

In those circumstances where an acquisition involves a contingent consideration arrangement, we recognize a liability equal to the fair value of the contingent payments we expect to make as of the acquisition date. We re-measure this liability each reporting period and record changes in the fair value through a separate line item withinContingent consideration expense (benefit) on our consolidated statements of operations. Increases or decreases in the fair value of the contingent consideration liability can result from changes in discount periods and rates, as well as changes in theperiods, timing and amount of projected revenue estimates or in the timing or likelihood of achieving regulatory, revenue or commercialization-based milestones. Payment of additional consideration is generally contingent on the acquired company reaching certain performance milestones after the acquisition date, including attaining specified revenue levels, achieving product development targets and/or obtaining regulatory approvals for products in development at the date of the acquisition.

Indefinite-lived Intangibles, including In-Process Research and DevelopmentIPR&D

Our indefinite-lived intangible assets, thatwhich are not subject to amortization, include acquired balloon and other technology, which is foundational to our continuingongoing operations within the Cardiovascular market and other markets within interventional medicine and in-process research and developmentIPR&D intangible assets acquired in a business combination. Our in-process research and developmentIPR&D represents intangible assets acquired in a business combination that are used in research and development activities but have not yet reached technological feasibility, regardless of whether they have alternative future use. The primary basis for determining the technological feasibility or completion of these projects is obtaining regulatory approval to market the underlying products in an applicable geographic region. We classify in-process research and developmentIPR&D acquired in a business combination as an indefinite-lived intangible asset until the completion or abandonment of the associated research and development efforts. Upon completion of the associated research and development efforts, we will determine the useful life of the technology and begin amortizing the assets to reflect their use over their remaining lives. Upon permanent abandonment, we would write-off the remaining carrying amount of the associated in-process research and developmentIPR&D intangible asset.

We test our indefinite-lived intangible assets at least annually during the third quarter for impairment and reassess their classification as indefinite-lived assets; inassets. In addition, we review our indefinite-lived intangible assets for classification and impairment more frequently if changes in circumstances or impairment indicators exist. We assess qualitative factors to determine whether the existence of events and circumstances indicate that it is more likely than not that our indefinite-lived intangible assets are impaired. If we conclude that it is more likely than not that the asset is impaired, we then determine the fair value of the intangible asset and perform the quantitative impairment test by comparing the fair value with the carrying value in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification® (ASC) Topic 350, Intangibles - Goodwill and Other (Topic 350).Other. If the carrying value exceeds the fair value of the indefinite-lived intangible asset, we write the carrying value down to the fair value.

We use the income approach to determine the fair values of our in-process research and development. This approach calculates fair value by estimating the after-tax cash flows attributable to an in-process project over its useful life and then discounting these after-tax cash flows back to a present value.IPR&D. We base our revenue assumptions on estimates of relevant market sizes, expected market growth rates, expected trends in technology and expected levels of market share. In arriving at the value of the in-process projects, we consider, among other factors:factors, the in-process projects’ stage of completion;completion, the complexity of the work completed as of the acquisition date;date, the costs already incurred;incurred, the projected costs to complete;complete, the contribution of other acquired assets;assets, the expected regulatory path and introduction dates by region;region and the estimated useful life of the technology. We apply a market-participant risk-adjusted discount rate to arrive at a present value as of the date of acquisition. See Note DC - Goodwill and Other Intangible Assets for more information related to indefinite-lived intangibles, including in-process research and development during 2016, 2015, and 2014.IPR&D.

For asset purchases outside of business combinations, we expense any purchased research and development assets as of the acquisition date.

Amortization and Impairment of Intangible Assets

We record definite-lived intangible assets at historical cost and amortize them over their estimated useful lives. We use a straight-line method of amortization, unless a method that better reflects the pattern in which the economic benefits of the intangible asset are consumed or otherwise used up can be reliably determined. The approximate useful lives for amortization of our intangible assets are as follows: patents and licenses, two to 20 years; definite-livedamortizable technology-related five to 25 years;and customer relationships, five to 25 years; other intangible assets, various.


We review intangible assets subject to amortization quarterly to determine if any adverse conditions exist or a change in circumstances has occurred that would indicate impairment or a change in the remaining useful life. Conditions that may indicate impairment include, but are not limited to, a significant adverse change in legal factors or business climate that could affect the value of an asset, a product recall or an adverse action or assessment by a regulator. If anwe determine it is more likely than not that the asset is impaired based on our qualitative assessment of impairment indicator exists,indicators, we test the intangible asset for recoverability. For purposes of the recoverability test, we group our amortizable intangible assets with other assets and liabilities at the lowest level of identifiable cash flows if the intangible asset does not generate cash flows independent of other assets and liabilities. If the carrying value of the intangible asset (asset group)or asset group exceeds the undiscounted cash flows expected to result from the use and eventual disposition of the intangible asset (asset group),or asset group, we will write the carrying value down to the fair value in the period impairment is identified.

We calculate fair value of our intangible assets as the present value of estimated future cash flows we expect to generate from the asset using a risk-adjusted discount rate.asset. In determining our estimated future cash flows associated with our intangible assets, we use estimates and assumptions about future revenue contributions, cost structures and remaining useful lives of the asset (asset

group).or asset group. See Note DC - Goodwill and Other Intangible Assets for more information related to impairments of intangible assets during 2016, 2015, and 2014.assets.

For patents developed internally, we capitalize costs incurred to obtain patents, including attorney fees, registration fees, consulting fees and other expenditures directly related to securing the patent.

Goodwill Valuation

Based on information regularly reviewed by our chief operating decision maker, we have three global reportable segments comprised of Cardiovascular, Rhythm Management, and MedSurg. We determined our global reporting units by identifying our operating segments and assessing whether any components of these segments constituted a business for which discrete financial information is available and whether segment management regularly reviews the operating results of any components. Through this process, we identified the following global reporting units: Interventional Cardiology, Peripheral Interventions, Cardiac Rhythm Management, Electrophysiology, Endoscopy, Urology and Pelvic Health, and Neuromodulation.

We allocate any excess purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination to goodwill. 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 impairment may exist. We assess goodwill for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment, referred to as a component. In 2016, we identified six operating segments including Interventional Cardiology, Peripheral Interventions, Rhythm Management, Endoscopy, Urology and Pelvic Health, and Neuromodulation. For purposes of identifying our reporting units, we then assessed whether any components of these segments constitute a business for which discrete financial information is available and where segment management regularly reviews the operating results of that component. We identified Rhythm Management as having two components: Cardiac Rhythm Management and Electrophysiology.

For our 2016, 20152018, 2017 and 20142016 annual impairment assessment, we identified seven reporting units, which align to our seven core businesses:units: Interventional Cardiology, Peripheral Interventions, Cardiac Rhythm Management, Electrophysiology, Endoscopy, Urology and Pelvic Health and Neuromodulation. As noted above, for our 2016 annual impairment assessment weWe aggregated the Cardiac Rhythm Management and Electrophysiology reporting units, components of the Rhythm Management operating segment, based on the criteria prescribed in FASB ASC Topic 350. These reporting units were aggregated due to a reorganization that commenced in 2015 that resulted in integrated leadership, shared resources and consolidation of certain sites in 2016.

In performing the goodwill impairment assessmentassessments for 2018, 2017 and 2016, we utilized both the optional qualitative assessment and the two-stepquantitative approach prescribed under FASB ASC Topic 350. Beginning in 2016, the350. The qualitative assessment was used for testing certain reporting units where fair value has historically exceeded carrying value by greater than 100%.100 percent. All other reporting units were tested using the two-step approach.quantitative approach described below. The qualitative assessment requires an evaluation of whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount based on an assessment of relevant events including macroeconomic factors, industry and market conditions, cost factors, overall financial performance and other entity-specific factors. After assessing the totality of events, if it is determined that it is not more likely than not that the fair value of the reporting unit is less thanexceeds its carrying value, the first and secondno further steps of the goodwill impairment test are unnecessary.required. If it is determined that impairment is more likely than not, then we perform the first step of the two-stepquantitative impairment test. In 2016,2018, we performed a qualitative assessment for our Urology and Pelvic Health and Neuromodulation reporting units since their fair values have exceeded carrying value by greater than 100 percent. The remaining reporting units were quantitatively tested for impairment. For all reporting units tested using the optional qualitative assessment, no further steps were required, and we concluded such reporting units were not impaired. For all reporting units tested using the quantitative approach, we concluded that it was not necessary to perform the first step of the two-step goodwill impairment test. The first step requires a comparison of the carrying value of the reporting units to the fair value of these units.each reporting unit exceeded its carrying value.

When allocating goodwill from business combinations to our reporting units, we assign goodwill to the reporting units that we expect to benefit from the respective business combination at the time of acquisition. In addition, for purposes of performing our goodwill impairment tests, assets and liabilities, including corporate assets, which relate to a reporting unit’s operations, and would be considered in determining its fair value, are allocated to the individual reporting units. We allocate assets and liabilities not directly related to a specific reporting unit, but from which the reporting unit benefits, based primarily on the respective revenue contribution of each reporting unit.

For our 2016, 2015,2018, 2017 and 20142016 annual impairment assessments, for those reporting units for which a quantitative test was performed,
we used only the income approach, specifically the Discounted Cash Flow (DCF) method, to derive the fair value of each of our reporting units. This approach calculates fair value by estimating the after-tax cash flows attributable to a reporting unit and then discounting these after-tax cash flows to a present value using a risk-adjusted discount rate.units in preparing our goodwill impairment assessments. We selected this method as being the most meaningful in preparing our goodwill assessments because we believe the income approach most appropriately measures our income producing assets. We have considered using the market approach and cost approach but concluded they are not appropriate in valuing our reporting units given the lack of relevant market comparisons available for application of the market approach and the inability to replicate

the value of the specific technology-based assets within our reporting units for application

of the cost approach. Therefore, we believe that the income approach represents the most appropriate valuation technique for which sufficient data are available to determine the fair value of our reporting units.

In applying the income approach to our accounting for goodwill, we make assumptions about the amount and timing of future expected cash flows, terminal value growth rates and appropriate discount rates. The amount and timing of future cash flows within our DCFDiscounted Cash Flow analysis is based on our most recent operational budgets, long range strategic plans and other estimates. The terminal value growth rate is used to calculate the value of cash flows beyond the last projected period in our DCF analysis and reflects our best estimates for stable, perpetual growth of our reporting units. We use estimates of market-participant risk-adjusted weighted average cost of capital (WACC) as a basis for determining the discount rates to apply to our reporting units’ future expected cash flows.

If the carrying value of a reporting unit exceeds its fair value, we then perform the second step of the goodwill impairment test to measure the amount of impairment loss, if any. If the carrying value of a reporting unit is zero or negative, we evaluate whether it is more likely than not that a goodwill impairment exists. If we determine adverse qualitative factors exist that would indicate it is more likely than not an impairment exists, we then perform the second step of the goodwill test. The second step of the goodwill impairment test compares the estimated fair value of a reporting unit’s goodwill to its carrying value. If we were unable to complete the second step of the test prior to the issuance of our financial statements and an impairment loss was probable and could be reasonably estimated, we would recognize our best estimate of the loss in our current period financial statements and disclose that the amount is an estimate. We would then recognize any adjustment to that estimate in subsequent reporting periods, once we have finalized the second step of the impairment test. Refer to Note DC - Goodwill and Other Intangible Assets to our consolidated financial statements for additional details related to our annual goodwill impairment test.balances.

Investments in Publicly Traded and Privately Held Entities

ASC Update No. 2016-01

In January 2016, the FASB issued ASC Update No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The purpose of Update No. 2016-01 is to improve financial reporting for financial instruments by reducing the number of items recorded to other comprehensive income. We accountadopted Update No. 2016-01 in the first quarter of 2018, using both the modified retrospective and prospective methods. For publicly-held securities, we used the modified retrospective approach. Unrealized gains and losses previously recorded to Other comprehensive income (loss) were reclassified to retained earnings,and all future fair value changes will be recorded to Net income (loss). For privately-held securities that we do not have the ability to exercise significant influence over the investee, we elected the measurement alternative approach for our existing investments, which is applied prospectively upon adoption. This approach requires entities to measure their investments at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The adoption of the standard did not have a material impact on our financial position or results of operations. The actual impact to future periods resulting from fair value changes of our equity investments is difficult to predict as it will depend on their future performance.

In 2017 and 2016, we accounted for our publicly traded investments as available-for-sale securities based on the quoted market price at the end of the reporting period. Unrealized holding gains or losses during the period, net of tax, arewere recorded to accumulatedAccumulated other comprehensive income/loss.income (loss), net of tax. We computecomputed realized gains and losses on sales of available-for-sale securities at fair value, based on the average cost method, adjusted for any other-than-temporary declines in fair value. AsWe accounted for investments in private entities in which we have less than a 20 percent ownership interest under the cost method of December 31, 2016,accounting if we held $20 million of available-for-sale securities. We held no available-for-sale securities during 2015 and 2014. do not have the ability to exercise significant influence over the investee in accordance with FASB ASC Topic 325,Investments - Other.

We account for investments in entities over which we have the ability to exercise significant influence under the equity method if we hold 50 percent or less of the voting stock and the entity is not a VIE in which we are the primary beneficiary in accordance with FASB ASC Topic 323, Investments - Equity Method and Joint Ventures(Topic 323). We record these investments initially at cost and adjust the carrying amount to reflect our share of the earnings or losses of the investee, including all adjustments similar to those made in preparing consolidated financial statements. We account for investments in entities in which we have less than a 20 percent ownership interest under the cost method of accounting if we do not have the ability to exercise significant influence over the investee in accordance with FASB ASC Topic 325,Investments - Other. In addition,Lastly, we have notes receivable from certain companies that we account for in accordance with FASB ASC Topic 320, Investments - Debt and Equity Securities(Topic 320). Refer to Note B – Acquisitions and Strategic Investments for additional details on the balances of our equity and cost method investments.investment balances.

Each reporting period, we evaluate our investments to determine if there are any events or circumstances that are likely to have a significant adverse effect on the fair value of the investment. Examples of such impairment indicators include, but are not limited to:to, a significant deterioration in earnings performance;performance, recent financing rounds at reduced valuations;valuations, a significant adverse change in the regulatory, economic or technological environment of an investee;investee or a significant doubt about an investee’s ability to continue as a going concern. If we identify an impairment indicator, we will estimate the fair value of the investment and compare it to its carrying value. Our estimation of fair value considers all available financial information related to the investee available to us, including valuations based on recent third-party equity investments in the investee. If the fair value of the investment is less than its carrying value, the investment is impaired and we make a determination as to whether the impairment is other-than-temporary. We deem an impairment to be other-than-temporary unless we have the ability and intent to hold an investment for a period sufficient for a market recovery up to the carrying value of the investment. Further, evidence must indicate that the carrying value of the investment is recoverable within a reasonable period. For other-than-temporary impairments, we recognize an impairment loss equal to the difference between an investment’s carrying value and its fair value if accounted for under measurement alternative. For our equity method investments, an impairment loss is recorded if we determine the impairment is other-than-temporary. We deem an impairment to be other-than-temporary unless available evidence indicates that the valuation is more likely than not to recover up to the carrying value of the investment in a reasonable period of time, and we have both the ability and intent to hold the investment for a sufficient period of time needed to recover the value. For other-than-temporary impairments, we recognize an impairment loss equal to the difference between an

investment’s carrying value and its fair value. Impairment losses on our investments are included in other,Other, net in our consolidated statements of operations.


Income Taxes

ASC Update No. 2016-16

In October 2016, the FASB issued ASC Update No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. The purpose of Update No. 2016-16 is to allow an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs, as opposed to waiting until the asset is sold to a third party, or impaired. Update No. 2016-16 was effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We adopted Update No. 2016-16 prospectively in the first quarter of 2018 and recognized a net reduction to opening retained earnings of $55 million for income tax consequences not previously recognized for intra-entity transfers of assets other than inventories. All future income tax consequences of intra-entity transfers of assets other than inventories will be recognized through Income tax expense (benefit).

We utilize the asset and liability method of accounting for income taxes. Under this method, we determine deferred tax assets and liabilities based on differences between the financial reporting and tax bases of our assets and liabilities. We measure deferred tax assets and liabilities using the enacted tax rates and laws that will be in effect when we expect the differences to reverse. We reduce our deferred tax assets by a valuation allowance if, based upon the weight of available evidence, it is more likely than not that we will not realize some portion or all of the deferred tax assets. We consider relevant evidence, both positive and negative, to determine the need for a valuation allowance. Information evaluated includes our financial position and results of operations for the current and preceding years, the availability of deferred tax liabilities and tax carrybacks, as well as estimates of the impact of future taxable income and available prudent and feasible tax-planning strategies.

We recognize interest and penalties related to income taxes as a component of income tax expense. As part of the Tax Cut and Jobs Act of 2017 (TCJA), we are subject to a territorial tax system in which we are required to make an accounting policy in providing for tax on Global Intangible Low Taxed Income (GILTI) earned by certain foreign subsidiaries. We have not provided U.S. income taxeselected to treat the impact of GILTI as a period cost and foreign withholding taxes on the undistributed earnings of foreign subsidiaries as of December 31, 2016 because we intend to permanently reinvest such earnings outside the U.S. As of December 31, 2016, the cumulative amount of excess financial reporting basis over the tax basis of investments in foreign subsidiaries that is indefinitely reinvested is approximately $9.8 billion. Generally, such amounts become subject to U.S. taxation upon the remittance of dividends and under certain other circumstances. It is not practicable to estimate the amount of deferred tax liability related to investments in these foreign subsidiaries.

We provide for potential amounts due in various tax jurisdictions. In the ordinary course of conducting business in multiple countries and tax jurisdictions, there are many transactions and calculations where the ultimate tax outcome is uncertain. Therefore, judgment is required based on individual facts, circumstances and information available in determining whether or not based on technical merits, the position will be sustained upon examination. In our opinion, we have made adequate provisions for income taxes in determining our worldwide income tax position for all years subject to audit. Although we believe our estimates are reasonable, the final outcomereported as a part of open tax matters may be different from that which we have reflected in our historical income tax provisions and accruals. Such differences could have a material impact on our income tax provision and operating results.continuing operations. See Note JI - Income Taxes for further information and discussion of our income tax provision and balances.balances including a discussion of the impacts of the TCJA.

Legal and Product Liability Costs

In the normal course of business, we are involved in various legal and regulatory proceedings, including intellectual property, breach of contract, securities litigation and product liability suits. In some cases, the claimants seek damages, as well as other relief, which, if granted, could require significant expenditures or impact our ability to sell our products. We are also the subject of certain governmental investigations, which could result in substantial fines, penalties and administrative remedies. We maintain an insurance policy providing limited coverage against securities claims, and we are substantially self-insured with respect to product liability claims and fully self-insured with respect to intellectual property infringement claims. We accrue anticipated costs of settlement, damages, losses for product liability claims and, under certain conditions, costs of defense, based on historical experience or to the extent specific losses are probable and estimable. Otherwise, we expense these costs as incurred. If the estimate of a probable loss is a range and no amount within the range is more likely, we accrue our best estimate of the minimum amount of the range. We analyze litigation settlements to identify each element of the arrangement. We allocate arrangement consideration to patent licenses received based on estimates of fair value and capitalize these amounts as assets if the license will provide an on-goingongoing future benefit. We record certain legal and product liability charges, credits and costs of defense, which we consider to be unusual or infrequent and significant as litigation-relatedLitigation-related charges within(credits) in our consolidated statements of operations; all other legal and product liability charges, credits and costs are recorded within selling,Selling, general and administrative expenses.expenses. See Note KJ – Commitments and Contingencies for discussion of our individual material legal proceedings.

Costs Associated with Exit Activities

We record employee termination costs in accordance with FASB ASC Topic 712, Compensation - Nonretirement and Postemployment Benefits(Topic 712), if we pay the benefits as part of an on-goingongoing benefit arrangement, which includes benefits provided as part of our established severance policies or that we provide in accordance with international statutory requirements. We accrue employee termination costs associated with an on-goingongoing benefit arrangement if the obligation is attributable to prior services rendered, the rights to the benefits have vested, the payment is probable and we can reasonably estimate the liability. We account for employee termination benefits that represent a one-time benefit in accordance with FASB ASC Topic 420, Exit or Disposal Cost Obligations (Topic 420).s. We record such costs into expense over the employee’s future service period, if any.


Other costs associated with exit activities may include contract termination costs, including costs related to leased facilities to be abandoned or subleased, consultant fees and impairments of long-lived assets.contract cancellations. The costs are expensed in accordance with FASB ASC Topic 420 and FASB ASC Topic 360, Property, Plant and Equipment and are included in restructuringRestructuring charges (credits) in our consolidated statementstatements of operations. Additionally, costs directly related to our active restructuring initiatives, including program

management costs, accelerated depreciation, fixed asset write-offs and costs to transfer product lines among facilities are included within costsCosts of products sold and selling,Selling, general and administrative expenses in our consolidated statementstatements of operations. See Note HG – Restructuring-related Activities for further information and discussion of our restructuring plans.

Translation of Foreign Currency

We translate all assets and liabilities of foreign subsidiaries from the functional currency, which is generally the local currency, into U.S. dollars using the year-end exchange rate and translate revenues and expenses at the average exchange rates in effect during the year. We show the net effect of these translation adjustments in our consolidated financial statements as a component of accumulatedAccumulated other comprehensive income.income (loss), net of tax. For any significant foreign subsidiaries located in highly inflationary economies, we would re-measure their financial statements as if the functional currency were the U.S. dollar. We did not record anyrecorded immaterial highly inflationary economy translation adjustments in 2016, 20152018, 2017 or 2014.2016.

Foreign currency transaction gains and losses are included in other,Other, net in our consolidated statements of operations, net of losses and gains from any related derivative financial instruments. We recognized net foreign currency transaction losses of $13 million in 2016, $21 million in 2015, and $18 million in 2014.

Financial Instruments

ASC Update No. 2017-12

In August 2017, the FASB issued ASC Update No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The purpose of Update No. 2017-12 is to simplify the application of hedge accounting and better align financial reporting of hedging relationships with risk management objectives. Update No. 2017-12 was effective for annual periods beginning after December 15, 2018, including interim periods within those annual periods. We early adopted Update No. 2017-12 in the first quarter of 2018. The adoption of the standard had no impact on our financial position or results of operations.

We recognize all derivative financial instruments in our consolidated financial statements at fair value in accordance with FASB ASC Topic 815, Derivatives and Hedging(Topic 815), and we present assets and liabilities associated with our derivative financial instruments on a gross basis in our financial statements. In accordance with FASB ASC Topic 815,, for those derivative instruments that are designated and qualify as hedging instruments, the hedging instrument must be designated, based upon the exposure being hedged, as a fair value hedge, cash flow hedge, or a hedge of a net investment in a foreign operation. The accounting for changes in the fair value (i.e. gains or losses) of a derivative instrument depends on whether it qualifies for, and has been designated and qualifies as part of a hedging relationship, and, further,as well as on the type of hedging relationship. Our derivative instruments do not subject our earnings or cash flows to material risk, as gains and losses on these derivatives generally offset lossesgains and gainslosses on the item being hedged. We do not enter into derivative transactions for speculative purposes, and we do not have any non-derivative instruments that are designated as hedging instruments pursuant to FASB ASC Topic 815.815. Refer to Note ED Hedging Activities and Fair Value Measurements for more information on our derivative instruments.

Shipping and Handling Costs

We generally do not bill customers for shipping and handling of our products. We treat shipping and handling costs incurred after a customer obtains control of the good as a fulfillment cost and record in Selling, general and administrative expenses in our consolidated statements of operations. Shipping and handling costs ofwere $124 million in 2018, $110 million in 2017 and $101 million in 2016, $93 million in 2015, and $100 million in 2014 are included in selling, general and administrative expenses.2016.

Research and Development

We expense research and development costs, including new product development programs, regulatory compliance and clinical research as incurred. Refer to Indefinite-lived Intangibles, including In-Process Research and Development above for our policy regarding in-process research and developmentIPR&D acquired in connection with our business combinations and asset purchases.

Employee Retirement Plans

Following our 2006 acquisition of Guidant Corporation, we sponsored the Guidant Supplemental Retirement Plan, a frozen, non-qualified defined benefit plan for certain former officers and employees of Guidant. The plan was partially frozen as of September 25, 1995 and completely frozen as of May 31, 2007, and was terminated effective December 1, 2014. During 2015, we finalized the termination process and settled the plan’s obligations. As a result, we recorded pension termination charges of $44 million for the year ended December 31, 2015. The Guidant Supplemental Retirement Plan was partially funded through a Rabbi Trust that contains segregated company assets used to pay the benefit obligations related to the plan.

We also maintain an Executive Retirement Plan, a defined benefit plan covering executive officers and division presidents and certain persons that may have served in these roles. Participants may retire with unreduced benefits once retirement conditions have been satisfied. In addition, we maintain retirement plans covering certain international employees.




We use a December 31 measurement date for these plans and record the underfunded portion as a liability, recognizing changes in the funded status through other comprehensive income (OCI). The outstanding obligation as of December 31, 2016 and 2015 is as follows:
  As of December 31, 2016
(in millions)
 Accumulated Benefit Obligation (ABO) Projected
Benefit
Obligation (PBO)
 Fair value of Plan Assets Underfunded
PBO Recognized
Executive Retirement Plan $15
 $17
 $
 $17
Guidant Supplemental Retirement Plan (frozen) 32
 32
 
 32
International Retirement Plans 93
 103
 54
 49
  140
 $152
 $54
 $98
  As of December 31, 2015
(in millions)
 Accumulated Benefit Obligation (ABO) Projected
Benefit
Obligation (PBO)
 Fair value of Plan Assets Underfunded
PBO Recognized
Executive Retirement Plan $12
 $14
 $
 $14
Guidant Supplemental Retirement Plan (frozen) 33
 33
 
 33
International Retirement Plans 76
 84
 52
 32
  $121
 $131
 $52
 $79

The value of the Rabbi Trust assets used to pay the Guidant Supplemental Retirement Plan benefits included in our accompanying consolidated financial statements was approximately $8 million as of December 31, 2016 and $11 million as of December 31, 2015.

A rollforward of the changes in the pension benefit obligation for our funded retirement plans during 2016 and 2015 is as follows:
  Year Ended December 31,
(in millions) 2016 2015
Beginning obligations $131
 $138
Service and interest costs 10
 9
Actuarial gain (loss) 10
 (5)
Plan amendments 7
 
Benefits paid (5) (5)
Foreign currency exchange (1) (6)
Ending obligation $152
 $131

The critical assumptions associated with our employee retirement plans as of December 31, 2016 are as follows:
   
Expected Return
on Plan Assets
 Rate of
 
Discount
Rate
  
Compensation
Increase
Executive Retirement Plan3.50%   3.00%
Guidant Supplemental Retirement Plan (frozen)4.00%    
International Retirement Plans0.50% - 2.13% 3.00% - 4.10% 2.50% - 6.78%

We base our discount rate on the rates of return available on high-quality bonds with maturities approximating the expected period over which benefits will be paid. The rate of compensation increase is based on historical and expected rate increases. We base our rate of expected return on plan assets on historical experience, our investment guidelines and expectations for long-term rates of return. Our international pension plan assets are invested in a variety of securities, primarily equity securities and government bonds. These securities are considered Level 1 fair value investments and are valued at quoted market prices.


A rollforward of the changes in the fair value of plan assets for our funded retirement plans during 2016 and 2015 is as follows:
  Year Ended December 31,
(in millions) 2016 2015
Beginning fair value $52
 $191
Actual return on plan assets (1) 1
Employer contributions 7
 6
Benefits paid (5) (145)
Foreign currency exchange 1
 (1)
Ending fair value $54
 $52

We also sponsor a voluntary 401(k) Retirement Savings Plan for eligible employees. We match 200 percent of employee elective deferrals for the first two percent of employee eligible compensation, and 50 percent of employee elective deferrals greater than two percent, but not exceeding six percent, of employee eligible compensation. Total expense for our matching contributions to the plan was $72 million in 2016, $69 million in 2015, and $63 million in 2014.

Net Income (Loss) per Common Share

We base netNet income (loss) per common share upon the weighted-average number of common shares and common stock equivalents outstanding during each year. Potential common stock equivalents are determined using the treasury stock method. We exclude stock options and stock awards whose effect would be anti-dilutive from the calculation.

NOTE B – ACQUISITIONS AND STRATEGIC INVESTMENTS
Our consolidated financial statements include the operating results for each acquired entity from its respective date of acquisition. We do not present pro forma financial information for these acquisitions given their results are not material to our consolidated financial statements. Transaction costs associated with these acquisitions were expensed as incurred and are not material for 2018, 2017 and 2016.

Proposed BTG Acquisition

On November 20, 2018, our board of directors and the years endedboard of directors of our wholly owned indirect subsidiary, Bravo Bidco Limited (Bidco), and BTG plc (BTG), a public company organized under the laws of England and Wales, issued an announcement (the Rule 2.7 Announcement) under Rule 2.7 of the United Kingdom City Code on Takeovers and Mergers, disclosing the terms of a recommended cash offer to be made by Bidco for the entire issued and to be issued ordinary share capital of BTG (the proposed BTG Acquisition). On January 24, 2019, Bidco made such offer on the terms and subject to the conditions of the scheme document published on the same date. In connection with the proposed BTG Acquisition, (i) we entered into a co-operation agreement with Bidco and BTG (the Co-operation Agreement), (ii) certain shareholders and each BTG director owning shares of BTG delivered deeds of irrevocable undertakings to Bidco and (iii) we entered into a bridge credit agreement (the Bridge Facility). Refer to Note E – Borrowings and Credit Arrangements for further details of the Bridge Facility. On February 14, 2019, each of the Company and BTG received a request for additional information and documentary material from the United States Federal Trade Commission in connection with the proposed BTG Acquisition.

Under the terms of the proposed BTG Acquisition, BTG shareholders will receive 840 pence in cash for each BTG share, which values BTG’s existing issued and to be issued ordinary share capital at approximately £3.311 billion (or approximately $4.225 billion based on the exchange rate of U.S. $1.28: £1.00 on December 31, 2018). We intend to implement the proposed BTG Acquisition by way of a court-sanctioned scheme of arrangement (Scheme) under Part 26 of the United Kingdom Companies Act 2006, as amended (the Companies Act).

The proposed BTG Acquisition will be subject to conditions and certain further terms, including (i) the approval of the Scheme by a majority in number of BTG shareholders also representing not less than 75 percent in value of the BTG shares, in each case, present, entitled to vote and voting, (ii) the sanction of the Scheme by the High Court of Justice in England and Wales, (iii) the Scheme becoming effective no later than August 20, 2019 and (iv) the receipt of regulatory approvals. The conditions to the proposed BTG Acquisition are set out in full in the Rule 2.7 Announcement. Subject to the satisfaction or waiver of all relevant conditions, we expect the proposed BTG Acquisition to be effective in the first half of 2019.

We are entitled to implement the proposed BTG Acquisition by way of a takeover offer (as defined in Part 28 of the Companies Act) in certain circumstances, subject to the terms of the Co-operation Agreement and the consent of the Panel on Takeovers and Mergers in the United Kingdom.

Pursuant to the Co-operation Agreement, the Company and Bidco have undertaken to use commercially reasonable efforts to secure the required regulatory clearances in respect of the proposed BTG Acquisition as soon as reasonably practicable, to provide each other with such information and assistance as may reasonably be required for the purpose of making any filing, notification or submission to relevant antitrust and regulatory authorities, and Bidco has agreed to provide BTG with information required for the preparation of Scheme documentation. The Co-operation Agreement addresses certain other matters, as set forth therein.

Invesco Asset Management Limited subsequently sold certain BTG shares, subject to its irrevocable undertaking, to certain funds managed by Pentwater Capital Management Europe LLP (together, the Pentwater Funds) and Woodford Investment Management Limited sold all of the BTG shares subject to its irrevocable undertaking to Arrowgrass Master Fund Limited and Anavio Capital Master Fund Limited and funds managed, variously, by Anavio Capital Partners LLP, Sand Grove Capital Management LLP, Tavira Securities and Melquart Asset Management (UK) Ltd. (all together with the Pentwater Funds, the New Shareholders). These BTG shares remain subject to deeds of irrevocable undertakings under which each New Shareholder is committed, among other things, to vote its BTG shares in favor of the Scheme and against any proposal that would impede or frustrate the completion of the proposed BTG Acquisition.

The Shareholder Undertakings and the Director Undertakings will remain in effect if the Company and Bidco elect to effect the proposed BTG Acquisition by way of a takeover offer and will cease to be binding in certain circumstances.
BTG develops and commercializes products used in minimally-invasive procedures targeting cancer and vascular diseases, as well as acute care pharmaceuticals.

2019 Acquisitions

Millipede, Inc.

On January 29, 2019, we announced the closing of our acquisition of Millipede, Inc. (Millipede), a privately-held company that has developed the IRIS Transcatheter Annuloplasty Ring System for the treatment of severe mitral regurgitation. We have been an investor in Millipede since the first quarter of 2018 as part of an investment and acquisition option agreement, whereby we purchased a portion of the outstanding shares of Millipede along with newly issued shares of the company for an upfront cash payment of $90 million. In the fourth quarter of 2018, upon the recent successful completion of a first-in-human clinical study, we exercised our option to acquire the remaining shares of Millipede. We held an interest of approximately 20 percent immediately prior to the acquisition date. The transaction price for the remaining stake consists of an upfront cash payment of $325 million and up to an additional $125 million payment upon achievement of a commercial milestone. Millipede will be part of our Interventional Cardiology business. Our initial accounting for Millipede will be completed in the first quarter of 2019, and as such, the purchase price allocation in the aggregated disclosures below excludes Millipede.

2018 Acquisitions

Augmenix, Inc.

On October 16, 2018, we announced the closing of our acquisition of Augmenix, Inc. (Augmenix), a privately-held company that developed and commercialized the SpaceOAR™ Hydrogel System to help reduce common and debilitating side effects that men may experience after receiving radiotherapy to treat prostate cancer. The transaction price consists of an upfront cash payment of $500 million and up to $100 million in payments contingent upon revenue-based milestones. Augmenix is part of our Urology and Pelvic Health business.

Claret Medical, Inc.

On August 2, 2018, we announced the closing of our acquisition of Claret Medical, Inc. (Claret), a privately-held company that has developed and commercialized the Sentinel™ Cerebral Embolic Protection System. The device is used to protect the brain during certain interventional procedures, predominately in patients undergoing transcatheter aortic valve replacement (TAVR). The transaction price consists of an upfront cash payment of $220 million and an additional $50 million payment for reaching a reimbursement-based milestone that was achieved in the third quarter. Claret is part of our Interventional Cardiology business.

Cryterion Medical, Inc.

On July 5, 2018, we announced the closing of our acquisition of Cryterion Medical, Inc. (Cryterion), a privately-held company developing a single-shot cryoablation platform for the treatment of atrial fibrillation. We have been an investor in Cryterion since 2016 2015, and 2014.held an interest of approximately 35 percent immediately prior to the acquisition date. The transaction price to acquire the remaining stake consists of an upfront cash payment of $202 million. Cryterion is part of our Electrophysiology business.

NxThera, Inc.

On April 30, 2018, we announced the closing of our acquisition of NxThera, Inc. (NxThera), a privately-held company that developed the Rezūm™ System, a minimally invasive therapy in a growing category of treatment options for patients with benign prostatic hyperplasia (BPH). We held a minority interest immediately prior to the acquisition date. The transaction price to acquire the remaining stake consists of an upfront cash payment of approximately $240 million and up to approximately $85 million in commercial-based milestones. NxThera is part of our Urology and Pelvic Health business.


nVision Medical Corporation

On April 16, 2018, we announced the closing of our acquisition of nVision Medical Corporation (nVision), a privately-held company focused on women’s health. nVision developed the first and only device cleared by the U.S. Food and Drug Administration (FDA) to collect cells from the fallopian tubes, offering a potential platform for earlier diagnosis of ovarian cancer. The transaction price consists of an upfront cash payment of $150 million and up to approximately $125 million in payments contingent upon clinical and commercial-based milestones. nVision is part of our Urology and Pelvic Health business.

In addition, we completed other individually immaterial acquisitions in 2018 for total consideration of $158 million in cash at closing plus aggregate contingent consideration of up to $62 million.

We recorded gains of $184 million in 2018 within Other, net on our consolidated statements of operations based on the difference between the book values and the fair values of our previously-held investments immediately prior to the acquisition dates, which aggregate to $251 million. We re-measured the fair value of each previously-held investment based on the implied enterprise value and allocation of purchase price consideration according to priority of equity interests.

Purchase Price Allocation

We accounted for these acquisitions as business combinations, and in accordance with FASB ASC Topic 805, Business Combinations, we recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition dates. The components of the aggregate preliminary purchase prices are as follows for our 2018 acquisitions as of December 31, 2018:
(in millions) 
Payments for acquisitions, net of cash acquired$1,449
Fair value of contingent consideration248
Fair value of prior interests251
 $1,948

The following summarizes the preliminary purchase price allocations for our 2018 acquisitions as of December 31, 2018:
(in millions) 
Goodwill$942
Amortizable intangible assets938
IPR&D213
Other assets acquired38
Liabilities assumed(19)
Net deferred tax liabilities(164)
 $1,948

We allocated a portion of the preliminary purchase prices to specific intangible asset categories as follows:
 
Amount Assigned
(in millions)
 
Amortization Period
(in years)
 
Risk-Adjusted Discount
Rates used in Purchase Price Allocation
Amortizable intangible assets     
Technology-related$907
 6 - 14 14% - 23%
Other intangible assets31
 6 - 13 13% - 15%
Indefinite-lived intangible assets     
IPR&D213
 N/A 15%
 $1,152
    


2017 Acquisitions

Apama Medical Inc.

On October 11, 2017, we announced the closing of our acquisition of Apama Medical Inc. (Apama), a privately-held company developing the Apama™ Radiofrequency single-shot Balloon Catheter System for the treatment of atrial fibrillation. The transaction price consisted of an upfront cash payment of approximately $175 million and up to approximately $125 million in payments contingent upon clinical and regulatory milestones. Apama is part of our Electrophysiology business.

Symetis SA

On May 16, 2017, we announced the closing of our acquisition of Symetis SA (Symetis), a privately-held Swiss structural heart company focused on minimally-invasive TAVR devices. The transaction price consisted of an upfront cash payment of approximately $430 million. Symetis is part of our Interventional Cardiology business.

Purchase Price Allocation

We accounted for these acquisitions as a business combination and, in accordance with FASB ASC Topic 805, Business Combinations, we recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. The components of the aggregated purchase prices are as follows for our 2017 acquisitions as of December 31, 2018:
(in millions) 
Payment for acquisitions, net of cash acquired$560
Fair value of contingent consideration72
 $632

The following summarizes the aggregated purchase price allocations for our 2017 acquisitions as of December 31, 2018:
(in millions) 
Goodwill$287
Amortizable intangible assets278
Indefinite-lived intangible assets186
Other assets acquired44
Liabilities assumed(61)
Deferred tax liabilities(102)
 $632

We allocated a portion of the purchase prices to specific intangible asset categories as follows:
 
Amount Assigned
(in millions)
 
Amortization Period
(in years)
 
Risk-Adjusted Discount
Rates used in Purchase Price Allocation
Amortizable intangible assets     
Technology-related$268
 13 24%
Other intangible assets10
 2 - 13 24%
Indefinite-lived intangible assets     
IPR&D$186
 N/A 15%
 $464
    


2016 Acquisitions

Neovasc, Inc.'s Advanced Biological Tissue Business

On December 12, 2016, we completed the acquisition of certain manufacturing assets and capabilities of the Neovasc, Inc. (Neovasc) advanced biological tissue business for a total upfront cash payment of $68 million. With this acquisition, we will integrate certain manufacturing assets and biologic tissue capabilities into our structural heart business for use in the manufacturing of the Lotus™ Valve System and future heart valve technologies within our Interventional Cardiology business. We began the process of integrating Neovasc into our Interventional Cardiology business in the fourth quarter of 2016 and expect to be substantially complete by the end of 2018.

EndoChoice Holdings, Inc.

On November 22, 2016, we completedannounced the closing of our acquisition of EndoChoice Holdings, Inc. (EndoChoice) for $8.00 per share or approximately $214 million. In addition, total consideration for the acquisition also included repayment of Endochoice's existing senior term loan facility totaling $43 million, and related acquisition fees and expenses. EndoChoice is, an Alpharetta, Georgia based company focused on the development and commercialization of infection control products, pathology services and single-use devices for specialists treating a wide range of gastrointestinal (GI) conditions. We began the processThe transaction price consisted of integrating EndoChoice into our Endoscopy business in the fourth quarter of 2016 and expect to be substantially complete by the end of 2017.

Distal Access, LLC's Gynecology and Urology Portfolio

On November 15, 2016, we completed the acquisition of the gynecology and urology portfolio of Distal Access, LLC (Distal), a Salt Lake City based company that designs minimally invasive medical devices for an upfront cash payment of $20approximately $213 million, plus a potential $35or $8.00 per share, and repayment of EndoChoice's existing senior term loan facility totaling $43 million in future consideration based on future sales through 2020 in addition to regulatory and product launch milestones. The portfolio includes the Resectr™ Tissue Resection Device, a single-use solution designed to remove uterine polyps. We began the processrelated acquisition fees and expenses. EndoChoice is part of integrating the Resectr device into our Urology and Pelvic Health business during the fourth quarter of 2016 and expect to be substantially complete by the end of 2017.

LumenR™ Tissue Retractor System

On November 1, 2016, we acquired the LumenR™ Tissue Retractor System from LumenR LLC (LumenR), a privately held Newark, California based company for an upfront cash payment of $30 million plus a potential $70 million in future consideration based on future sales through the third quarter of 2026 in addition to development and technology transfer milestones. The LumenR™ Tissue Retractor System is currently in development for use during endoscopic resection of lesions in the colon, esophagus or stomach.

Cosman Medical, Inc.Endoscopy business.

On July 27,In addition, we completed other individually immaterial acquisitions during 2016 we acquired Cosman Medical, Inc. (Cosman), a privately held manufacturerfor total consideration of radiofrequency ablation systems, expanding our Neuromodulation portfolio and offering physicians treating patients with chronic pain a wider choice$189 million in cash at closing plus aggregate contingent consideration of non-opioid therapeutic options. Total consideration was comprised of $71up to $125 million in up-front cash plus related fees and expenses, and a potential additional $20 million in consideration based on future sales through June 30, 2019. We are in the process of integrating Cosman into our Neuromodulation business, and expect the integration to be substantially complete by the end of 2017..

Purchase Price Allocation

We accounted for these acquisitions as a business combination and, in accordance with FASB ASC Topic 805, Business Combinations (Topic 850), we recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. The components of the aggregate preliminaryaggregated purchase priceprices are as follows (in millions):follows:
Cash, net of cash acquired$366
(in millions) 
Payment for acquisitions, net of cash acquired$365
Fair value of contingent consideration50
50
Fair value of debt repaid43
43
$459
$458

The following summarizes the preliminaryaggregated purchase price allocationallocations for our 2016 acquisitions as of December 31, 2016, (in millions):acquisitions:
Goodwill$208
Amortizable intangible assets228
Inventory11
Property, plant and equipment6
Other net liabilities(2)
Deferred income taxes8
 $459
(in millions) 
Goodwill$204
Amortizable intangible assets228
Other assets acquired83
Liabilities assumed(57)
 $458

We allocated a portion of the preliminary purchase priceprices to specific intangible asset categories as follows:
 
Amount
Assigned
(in millions)
 
Weighted
Average
Amortization
Period
(in years)
 Range of Risk-
Adjusted Discount
Rates used in
Purchase Price
Allocation
Amortizable intangible assets:     
Technology-related$176
 9-13 11% - 20%
Customer relationships51
 9-13 11% - 12%
Other intangible assets1
 4 11%
 $228
    


2015 Acquisitions

Interventional Radiology Business of CeloNova Biosciences

On December 31, 2015, we completed the acquisition of the interventional radiology business of CeloNova Biosciences (CeloNova), for an upfront payment of $70 million and additional payments contingent on regulatory and sales milestones. The acquisition includes drug-eluting microspheres designed to be loaded with chemotherapy drugs for delivery to cancerous tumors, and spherical embolic products used to treat uterine fibroids and other conditions. We are in the process of integrating CeloNova into our Peripheral Interventions business and expect to be substantially complete by the second half of 2017.

AMS Portfolio Acquisition

On August 3, 2015, we completed the acquisition of the American Medical Systems male urology portfolio (AMS Portfolio Acquisition), which includes the men's health and prostate health businesses, from Endo International plc. Total consideration was comprised of $1.616 billion in up-front cash plus related fees and expenses, and a potential additional $50 million in consideration based on 2016 sales. The AMS male urology portfolio was integrated with our formerly named Urology and Women's Health business, and the joint businesses became Urology and Pelvic Health. The integration was substantially complete by the end of 2016. In addition, as part of the acquisition agreement, we made a $60 million Series B non-voting preferred stock investment in the women's health business of Endo Health Solutions, a wholly owned subsidiary of Endo International, plc., representing the remaining Women's Health business of the American Medical Systems' Portfolio. This investment was subsequently repaid in the fourth quarter of 2015.

Xlumena, Inc.

On April 2, 2015, we acquired Xlumena, Inc. (Xlumena), a medical device company that developed minimally invasive devices for Endoscopic Ultrasound (EUS) guided transluminal drainage of targeted areas within the gastrointestinal tract. The purchase agreement called for an upfront payment of $63 million, an additional payment of $13 million upon FDA clearance of the HOT AXIOS™ Product, and further sales-based milestones based on sales achieved through 2018. In 2016, we completed the integration of Xlumena into our Endoscopy business.

In addition, we completed other acquisitions during 2015 for total consideration of $6 million in cash at closing plus contingent consideration of up to $1 million.

Purchase Price Allocation

We accounted for these acquisitions as business combinations and, in accordance with FASB ASC Topic 850, we have recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition dates. The components of the aggregate purchase prices are as follows (in millions):
Cash, net of cash acquired$1,735
Fair value of contingent consideration63
 $1,798

The following summarizes the aggregate purchase price allocation for the 2015 acquisitions as of December 31, 2015 (in millions):
Goodwill$573
Amortizable intangible assets1,074
Indefinite-lived intangible assets6
Inventory103
Property, plant and equipment43
Other net assets42
Deferred income taxes(43)
 $1,798


We allocated a portion of the purchase price to specific intangible asset categories as follows:
 
Amount
Assigned
(in millions)
 
Weighted
Average
Amortization
Period
(in years)
 Range of Risk-
Adjusted Discount
Rates used in
Purchase Price
Allocation
Amortizable intangible assets:     
Technology-related$431
 11-13 14% - 23%
Customer relationships625
 12-13 14% - 15%
Other intangible assets18
 13 14%
Indefinite-lived intangible assets:     
In-process research & development$6
 N/A 17%
 $1,080
    

2014 Acquisitions

Interventional Business of Bayer AG

On August 29, 2014, we completed the acquisition of the Interventional Division of Bayer AG (Bayer), for a total cash consideration of $414 million. We believe that this acquisition enhances our ability to offer physicians and healthcare systems a more complete portfolio of solutions to treat challenging vascular conditions. The transaction includes the AngioJet™ Thrombectomy System and the Fetch® 2 Aspiration Catheter, which are used in endovascular procedures to remove blood clots from blocked arteries and veins, and the JetStream™ Atherectomy System, used to remove plaque and thrombi from diseased arteries. In 2016, we completed the integration of Bayer into our Peripheral Interventions and Interventional Cardiology businesses.
IoGyn, Inc.

On May 7, 2014, we completed the acquisition of the remaining fully diluted equity of IoGyn, Inc. (IoGyn). Prior to the acquisition, we held a 28 percent minority interest in IoGyn in addition to notes receivable of approximately $8 million. Total consideration was comprised of a net cash payment of $65 million at closing to acquire the remaining 72 percent of IoGyn equity and repay outstanding debt. IoGyn has developed the Symphion™System, a next generation system for hysteroscopic intrauterine tissue removal including fibroids (myomas) and polyps. In March 2014, IoGyn received U.S. Food & Drug Administration (FDA) approval for the system and in October 2014, we began a limited market release of the system in the United States. We integrated the operations of the IoGyn business into our Urology and Pelvic Health business.

In addition, we completed other acquisitions during 2014 for total consideration of $7 million cash at closing plus contingent consideration of up to $4 million.

Purchase Price Allocation
We accounted for these acquisitions as business combinations and, in accordance with FASB ASC Topic 850, we have recorded the assets acquired and liabilities assumed at their respective fair values as of the acquisition date. The components of the aggregate purchase price for our 2014 acquisitions are as follows (in millions):
Cash, net of cash acquired$479
Fair value of prior interests31
 $510

In addition, prior to the acquisition of IoGyn, we had an equity interest in IoGyn and held $8 million of notes receivables. We re-measured our previously-held investments to their estimated acquisition-date fair value of $31 million and recorded a gain of $19 million in other, net, in the accompanying consolidated statements of operations during the second quarter of 2014. We measured the fair values of the previously-held investments based on the liquidation preferences and priority of the equity interest and debt, including accrued interest.


The following summarizes the aggregate purchase price allocation for our 2014 acquisitions as of December 31, 2014:
Goodwill$210
Amortizable intangible assets263
Inventory23
Property, plant and equipment17
Prepaid Transaction Service Agreement5
Other net assets(1)
Deferred income taxes(7)
 $510
We allocated a portion of the purchase price to specific intangible asset categories as follows:
Amount
Assigned
(in millions)
 
Weighted
Average
Amortization
Period
(in years)
 Range of Risk-
Adjusted Discount
Rates used in
Purchase Price
Allocation
Amount Assigned
(in millions)
 
Weighted Average Amortization Period
(in years)
 Risk-Adjusted Discount
Rates used in Purchase Price Allocation
Amortizable intangible assets:     
Amortizable intangible assets     
Technology-related$233
 10 - 14 14 - 18 %$176
 9 - 13 11% - 20%
Customer relationships29
 10 18%51
 9 - 13 11% - 12%
Other intangible assets1
 2 14%1
 4 11%
$263
 $228
 

For our 2016, 20152018, 2017 and 20142016 acquisitions, our technology-related intangible assets consist of technical processes, intellectual property and institutional understanding with respect to products and processes that we will leverage in future products or processes and will carry forward from one product generation to the next. We used the multi-period excess earnings method, a variation of the income approach and relief from royalty approach to derive the fair value of the technology-related intangible assets and are amortizing them on a straight-line basis over their assigned estimated useful lives.

In-process research and development represents the estimated fair value of acquired in-process research and development projects that have not yet reached technological feasibility. These indefinite-livedOther intangible assets are tested for impairment on an annual basis, or more frequently if impairment indicators are present, in accordance with U.S. GAAPprimarily include acquired customer relationships and our accounting policies. Upon completion of the associated research and development efforts, we will determine the useful life of the technology and begin amortizing the assets to reflect their use over their remaining lives. The primary basis for determining the technological feasibility or completion of these projects is obtaining regulatory approval to market the underlying products.

tradenames. Customer relationships represent the estimated fair value of non-contractual customer, payor and distributor relationships. Customer relationships are direct relationships with physicians and hospitals performing procedures with the acquired products, payor relationships are contracts and relationships with healthcare payors relating to reimbursement of services and distributor relationships are relationships with third parties used

to sell the acquired products, all as of the acquisition date. These relationships were valued separately from goodwill because there is a history and pattern of conducting business with customers and distributors. We used the income approach or the replacement cost and lost profits methodology to derive the fair value of the customer relationships. The customer relationships intangible assets are amortized on a straight-line basis over their assigned estimated useful lives.

Other intangible assets primarily include acquired tradenames. These tradenames Tradenames include brand names that we expect to continue using in our product portfolio and related marketing materials. The tradenames are valued using a relief from royalty methodology and are amortized on a straight-line basis over their assigned estimated useful lives.

We believe that the estimated intangible asset values represent the fair value at the date of acquisition and do not exceed the amount a third party would pay for the assets. These fair value measurements are based on significant unobservable inputs, including management estimates and assumptions and, accordingly, are classified as Level 3 within the fair value hierarchy prescribed by FASB ASC Topic 820, Fair Value Measurements and Disclosures.


We recorded the excess of the aggregate purchase price over the estimated fair values of the identifiable assets acquired as goodwill. Goodwill was established due primarily to synergies expected to be gained from leveraging our existing operations as well as revenue and cash flow projections associated with future technologies and has been allocated to our reportable segments based on the relative expected benefit. OfBased on preliminary estimates, the goodwill recorded approximately $116 million, based on preliminary estimates, related to our 20162018 acquisitions is not deductible for tax purposes. The goodwill recorded related to our 2017 acquisitions is not deductible for tax purposes. Of the goodwill recorded related to our 20152016 acquisitions, $449$116 million is deductible for tax purposes and $160 million of the recorded goodwill related to our 2014 acquisitions is deductible for tax purposes. Refer to Note DC - Goodwill and Other Intangible Assets for more information related to goodwill allocated to our reportable segments.

Contingent Consideration
Certain of our acquisitions involve contingent consideration arrangements. Payment of additional consideration is generally contingent on the acquired company reaching certain performance milestones, including attaining specified revenue levels, achieving product development targets and/or obtaining regulatory approvals. In accordance with U.S. GAAP, we recognize a liability equal to the fair value of the contingent payments we expect to make as of the acquisition date. We re-measure this liability each reporting period and record changes in the fair value through a separate line item within our consolidated statements of operations.
We recorded a net expense related to the changes in fair value of our contingent consideration liabilities of $29 million during 2016, net expense related to the changes in fair value of our contingent consideration liabilities of $123 million during 2015, and a net benefit related to the change in fair value of our contingent consideration liabilities of $85 million during 2014. We made contingent consideration payments of $122 million in 2016, $213 million in 2015 and $137 million in 2014.
Changes in the fair value of our contingent consideration liabilitiesliability were as follows (in millions):follows:
Balance as of December 31, 2014$274
Amounts recorded related to new acquisitions63
Other amounts recorded related to prior acquisitions(1)
Fair value adjustment123
Contingent payments related to prior period acquisition(213)
Balance as of December 31, 2015$246
Amounts recorded related to new acquisitions50
Other amounts recorded related to prior acquisitions1
Fair value adjustment29
Contingent payments related to prior period acquisition(122)
Balance as of December 31, 2016$204
(in millions) 
Balance as of December 31, 2016$204
Amounts recorded related to current year acquisitions94
Contingent consideration expense (benefit)(80)
Contingent consideration payments(48)
Balance as of December 31, 2017$169
Amounts recorded related to current year acquisitions248
Purchase price adjustments related to prior year acquisitions(22)
Contingent consideration expense (benefit)(21)
Contingent consideration payments(28)
Balance as of December 31, 2018$347
As of December 31, 2016,2018, the maximum amount of future contingent consideration (undiscounted) that we could be required to pay was approximately $1.308 billion.$873 million. The maximum amount of future contingent consideration (undiscounted) decreased approximately $447 million compared to the amount as of December 31, 2017 due primarily to the expiration of certain contingent consideration arrangements in 2018.
Contingent consideration liabilities are remeasured to fair value each reporting period using projected revenues, discount rates, probabilities of payment and projected payment dates. The recurring Level 3 fair value measurements of our contingent consideration liabilities include the following significant unobservable inputs:

Contingent Consideration LiabilityLiabilitiesFair Value as of December 31, 20162018Valuation TechniqueUnobservable InputRange
R&D, Regulatory and Commercialization-based MilestoneMilestones$46189 millionDiscounted Cash FlowDiscount Rate2%3% - 3%4%
Probability of Payment17% - 100%
Projected Year of Payment20172019 - 20212022
Revenue-based Payments$60158 millionDiscounted Cash FlowDiscount Rate11% - 15%
Projected YearProbability of Payment201760% - 2026
$98 millionMonte CarloRevenue Volatility25%
Risk Free RateLIBOR Term and Cost of Debt Structure100%
Projected Year of Payment20172019 - 20222026

Increases or decreases in the fair value of our contingent consideration can result from changes in discount periods and rates, as well as changes in the timing and amount of revenue estimates or in the timing or likelihood of achieving R&D, regulatory and commercialization-based, and revenue-based milestones.
Projected contingent payment amounts related to some of our R&D, regulatory and commercialization-based and revenue-based milestones are discounted back to the current period using a discounted cash flow (DCF)Discounted Cash Flow model. Other revenue-based payments are valued using a Monte Carlo valuation model, which simulates future revenues during the earn out-period using management's best estimates. Projected revenues are based on our most recent internal operational budgets and long-range strategic plans. Increases or decreases in projected revenues, and probabilities of payment, discount rates or the time until payment may result in highermaterially different fair value measurements. Increases in discount rates and the time to payment may result in lower fair value measurements. Increases or decreases in any of those inputs together, or in isolation, may result in a significantly lower or higher fair value measurement.

Strategic Investments

On April 30, 2015, we acquired a 27 percent ownership interest in Preventice Solutions, Inc. (Preventice), which includes 18.5 percent of Preventice's common stock. Preventice is a privately-held company headquartered in Minneapolis, MN, and a leading developer of mobile health solutions and services. In addition to the equity agreement, we entered into a commercial agreement with Preventice, under which we have become Preventice’s exclusive, worldwide sales and marketing representative. In October 2016, we notified Preventice of our intent to terminate the commercial agreement and will transition the sales force back to Preventice in 2017 under the terms of the agreement.

On April 13, 2015, we acquired 25 percent of the common stock of Frankenman Medical Equipment Company (Frankenman). Frankenman is a privately-held company headquartered in Suzhou, China, and is a local market leader in surgical staplers. Additionally, we entered into co-promotional and co-selling agreements with Frankenman to commercialize selected products jointly in China. We believe this alliance will enable us to reach more clinicians and treat more patients in China by providing access to training on less invasive endoscopic technologies with clinical and economic benefits.

We are accounting for our investments in Preventice and Frankenman, as well as certain of our other strategic investments, as equity method investments, in accordance with FASB ASC Topic 323.

The aggregate carrying amountamounts of our strategic investments as of December 31, 2016 and December 31, 2015, were comprised of the following categories:
 As ofAs of
 December 31, 2016December 31, 2015
(in millions)December 31, 2018 December 31, 2017
Equity method investments $265
$173
$303
 $209
Cost method investments 20
45
Available-for-sale securities 20

Measurement alternative investments94
 81
Publicly-held securities
 15
Notes receivable 42
30
26
 47
 $347
$248
$424
 $353

These investments are classified as Other long-term assets within our accompanying consolidated balance sheets, in accordance with U.S. GAAP and our accounting policies.

As of December 31, 2016,2018, the book valuecost of our aggregated equity method investments exceeded our share of the book value of the investees’ underlying equity in net assets by approximately $200$334 million, which represents amortizable intangible assets, and in-process research and development, correspondingIPR&D, deferred tax liabilities and goodwill. The net losses from

As of December 31, 2017, the cost of our aggregated equity method adjustments, presented withininvestments exceeded our share of the Other,underlying equity in net caption of our consolidated statement of operations were $17 assets by approximately $212 million, in 2016which represents amortizable intangible assets, IPR&D, deferred tax liabilities and were immaterial in 2015 and 2014.

goodwill.

NOTE C – DIVESTITURES
In January 2011, we closed the sale of our Neurovascular business to Stryker Corporation for a purchase price of $1.500 billion in cash. At the time of divestiture, due to our continuing involvement in the operations of the Neurovascular business following the transaction, the divestiture did not meet the criteria for presentation as a discontinued operation. Our sales related to our divested Neurovascular business have declined as the various transition services and supply agreements have terminated.
We recorded a gain of $12 million during 2014 associated with the transaction and we recorded revenue related to the Neurovascular business following its divestiture of $4 million in 2014.


NOTE D – 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 December 31, 2016 and 2015 are as follows:
 As of December 31, 2016 As of December 31, 2015
 Gross Carrying 
Accumulated
Amortization/
 Gross Carrying 
Accumulated
Amortization/
As of December 31, 2018 As of December 31, 2017
(in millions) Amount Write-offs Amount Write-offsGross Carrying Amount 
Accumulated
Amortization/Write-offs
 Gross Carrying Amount 
Accumulated
Amortization/Write-offs
Amortizable intangible assets               
Technology-related $9,123
 $(4,468) $8,948
 $(4,054)$10,197
 $(5,266) $9,386
 $(4,880)
Patents 529
 (374) 520
 (358)520
 (393) 517
 (379)
Other intangible assets 1,583
 (722) 1,529
 (610)1,666
 (958) 1,633
 (838)
 $11,235
 $(5,564) $10,997
 $(5,022)$12,383
 $(6,617) $11,536
 $(6,097)
Unamortizable intangible assets        
Indefinite-lived intangible assets       
Goodwill $16,578
 $(9,900) $16,373
 $(9,900)$17,811
 $(9,900) $16,898
 $(9,900)
In-process research and development (IPR&D) 92
 
 99
 
IPR&D486
 
 278
 
Technology-related 120
 
 120
 
120
 
 120
 
 $16,790
 $(9,900) $16,592
 $(9,900)$18,417
 $(9,900) $17,295
 $(9,900)

In the third quarter of 2018, we performed our annual impairment test of all IPR&D projects and our indefinite-lived core technology assets and determined that the assets were not impaired. In addition, we verified the classification as indefinite-lived assets continues to be appropriate.

Intangible asset impairment charges were immaterial in 2018, 2017 and 2016.

Our technology-related intangible assets that are not subject to amortization represent technical processes, intellectual property and/or institutional understanding acquired through business combinations that are fundamental to the on-going operations ofEffective January 1, 2018, we reclassified our businessNeuromodulation operating segment and have no limit to their useful life. Our technology-related intangible assets that are not subject to amortization are comprised primarily of certain acquired balloon and other technology, which is foundationalassociated goodwill balance from our MedSurg reportable segment to our continuing operations within the Cardiovascular marketRhythm and other markets within interventional medicine. We assessNeuro reportable segment as discussed in Note A – Significant Accounting Policies. This change did not impact our indefinite-lived intangible assets at least annually for impairment and reassess their classification as indefinite-lived assets. We assess qualitative factors to determine whether the existence of events and circumstances indicate that it is more likely than not that our indefinite-lived intangible assets are impaired. If we conclude that it is more likely than not that the asset is impaired, we then determine the fair value of the intangible asset and perform the quantitative impairment test by comparing the fair value with thetotal goodwill carrying value in accordance with FASB ASC Topic 350.

value. 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
 (2) 2
Goodwill acquired 23
 
 550
 573
Balance as of December 31, 2015 $3,451
 $292
 $2,730
 $6,473
Purchase price adjustments 
 (2) (1) (3)
Goodwill acquired 62
 
 146
 208
Balance as of December 31, 2016 $3,513
 $290
 $2,875
 $6,678

The 2016 and 2015 purchase price adjustments relate primarily to adjustments in taxes payable and deferred income taxes, including changes in the liability for unrecognized tax benefits.

Goodwill Impairment Testing
(in millions)MedSurg Rhythm and Neuro Cardiovascular Total
Balance as of December 31, 2016$2,875
 $290
 $3,513
 $6,678
Impact of foreign currency fluctuations and other changes in carry amount2
 1
 9
 12
Goodwill acquired
 126
 182
 308
Balance as of December 31, 2017$2,877
 $417
 $3,704
 $6,998
Impact of reportable segment revisions(1,379) 1,379
 
 
Impact of foreign currency fluctuations and other changes in carry amount(3) (22) (3) (29)
Goodwill acquired568
 150
 224
 942
Balance as of December 31, 2018$2,063
 $1,924
 $3,925
 $7,911

We test ourdid not have any goodwill balances during the second quarter of each year for impairment,impairments in 2018, 2017 or more frequently if indicators are present or changes in circumstances suggest that impairment may exist.2016.

In performing the goodwill impairment assessment, we utilize both the optional qualitative assessment and the two-step approach prescribed underEstimated FASB ASC Topic 350Amortization expense. Beginning in 2016, the qualitative assessment was used for testing certain reporting units where fair value has historically exceeded the carrying value by greater than 100%. All other reporting units were tested using the two-step approach. In 2016, for all reporting units tested using the optional qualitative assessment, we concluded that it was not necessary to perform the first step of the two-step goodwill test. For all reporting units tested under the two step approach, we concluded that the fair value of each reporting unit exceeded its carrying value. Because our global Electrophysiology reporting

unit was identified as being at higher risk of potential goodwill impairment during our 2015 annual test, it was tested for impairment on a stand-alone basis in the second quarter of 2016, immediately prior to aggregating it with our global Cardiac Rhythm Management reporting unit. The fair value of the stand-alone global Electrophysiology reporting unit exceeded the carrying value by approximately 36 percent. In comparison, the global Electrophysiology reporting unit had excess fair value of approximately 28 percent as of our 2015 annual test. As of the date of our 2016 annual goodwill impairment test, the aggregated global Electrophysiology and Cardiac Rhythm Management operating segment (Rhythm Management) had excess fair value over carrying value of approximately 70 percent and held $292 million of allocated goodwill. As such, it was not deemed at higher risk of future impairment. 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 Note A - Significant Accounting Policies and Critical Accounting Policies and Estimates within Management's Discussion and Analysis of Financial Condition and Results of Operations contained in Item 7 of this Annual Report on Form 10-K 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 result in impairment of our goodwill. Future events or factors could have a negative impact on the levels of excess fair value over carrying value of our reporting units and negative changes in one or more of these events or factors 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 December 31, 2015 $(1,479) $(6,960) (1,461) $(9,900)
Goodwill written off 
 
 
 
Accumulated write-offs as of December 31, 2016 $(1,479) $(6,960) $(1,461) $(9,900)

Intangible Asset Impairment Charges

Unamortizable 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 Note A – Significant Accounting Policies of this Annual Report on Form 10-K. In addition, on a quarterly basis, we monitor all intangible assets for events or other potential indicators of impairment that would warrant an interim impairment test.

The intangible asset category and associated write downs recorded in 2016, 2015 and 2014 were as follows:
  Year Ended December 31,
(in millions) 2016 2015 2014
Amortizable intangible assets $4
 $9
 $107
In-process research and development 7
 10
 88
  $11
 19
 $195


2014 Charges

During the fourth quarter of 2014, as a result of revised estimates in conjunction with our annual operating plan, we performed an interim impairment test of in-process research and development projects associated with certain of our acquisitions. Based on our impairment assessment, and lower expected future cash flows associated with our intangible assets, we recorded an impairment charge of $18 million to write-down the balances of these in-process projects to their fair value, which was determined to be zero.

During the third quarter of 2014, we performed our annual impairment test of all in-process research and development 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 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 in-process research and development projects and core technology assets associated with certain of our acquisitions. Based on our impairment assessment, and lower expected future cash flows associated with our intangible assets, we recorded impairment charges of $110 million. The impairment charges were due to 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 our hypertension technology; as a result, we recorded impairment charges of $67 million related to these technology intangible assets. 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 in-process research and development intangible assets acquired from Atritech, Inc. (Atritech). We also recorded an $8 million intangible asset impairment charge associated with changes in the amount of the expected cash flows related to certain other acquired in-process research and development 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 hypertension-related in-process research and development projects and core technology assets. 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 hypertension-related intangible assets, we recorded impairment charges of $55 million in the first quarter of 2014 to write-down the balance of these intangible assets to their fair value.


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

Intangible AssetValuation DateFair ValueValuation TechniqueUnobservable InputRate
Technology-related (amortizable)September 30, 2015$8 millionIncome Approach -Excess Earnings MethodDiscount Rate10%
In-Process R&DJune 30, 2015$6 millionIncome Approach - Excess Earnings MethodDiscount Rate 16.5 - 20%
In-Process R&DSeptember 30, 2014$16 millionIncome Approach - Excess Earnings MethodDiscount Rate 16.5 - 20%
In-Process R&DJune 30, 2014$83 millionIncome Approach - Excess Earnings MethodDiscount Rate 16.5 - 20%
Technology-related (amortizable)June 30, 2014$8 millionIncome Approach - Excess Earnings MethodDiscount Rate15%
In-Process R&DMarch 31, 2014$6 millionIncome Approach - Excess Earnings MethodDiscount Rate20%
Technology-related (amortizable)
March 31, 2014$64 millionIncome Approach - Excess Earnings MethodDiscount Rate15%

Estimated amortization expense for each of the five succeeding fiscal years based upon our amortizable intangible asset portfolio as of December 31, 20162018 is as follows:follows (in millions):
  
 Estimated Amortization Expense
Fiscal Year (in millions) 
2017 $535
2018 525
2019 523
$639
2020 519
635
2021 481
599
2022571
2023551

NOTE ED HEDGING ACTIVITIES AND FAIR VALUE MEASUREMENTS

Derivative Instruments and Hedging Activities

We address market risk from changes in foreign currency exchange rates and interest rates through a risk management program that includesprograms which include the use of derivative financial instruments, and weinstruments. We operate the programthese programs pursuant to documented corporate risk management policies.policies and do not enter into derivative transactions for speculative purposes. Our derivative instruments do not subject our earnings or cash flows to material risk, as the gains andor losses on these derivatives generally offset losses andor gains recognized on the item being hedged. hedged item.

We domanage concentration of counterparty credit risk by limiting acceptable counterparties to major financial institutions with investment grade credit ratings, limiting the amount of credit exposure to individual counterparties and by actively monitoring counterparty credit ratings and the amount of individual credit exposure. We also employ master netting arrangements that limit the risk of counterparty non-payment on a particular settlement date to the net gain that would have otherwise been received from the counterparty. Although not enter into derivative transactions for speculative purposes andcompletely eliminated, we do not have any non-derivativeconsider the risk of counterparty default to be significant as a result of these protections. Further, none of our derivative instruments are subject to collateral or other security arrangements, nor do they contain provisions that are designated as hedging instruments pursuant to FASB ASC Topic 815.dependent on our credit ratings from any credit rating agency.

Currency HedgingDerivative Instruments
We are exposed toRisk Management Strategy
Our risk from changes in currency risk consistingexchange rates consists primarily of foreign currency denominated monetary assets and liabilities, forecasted foreign currency denominatedforecast intercompany transactions and third-party transactions and net investments in certain subsidiaries. We manage our exposure to changes in foreign currency exchange rates onrate risk at a consolidated basislevel to takereduce the cost of hedging by taking advantage of offsetting transactions. We useemploy derivative instruments, and non-derivative transactionsprimarily forward currency contracts, to reduce the risk thatto our earnings and cash flows associated with these foreign currency denominated balances and transactions will be adversely affected by foreignchanges in currency exchange rate changes.rates.

Currently or Previously Designated Foreign Currency Hedges
All of our designated currency hedge contracts outstanding as of December 31, 2016 and December 31, 2015 were cash flow hedges under Topic 815 intended to protect the U.S. dollar value of our forecasted foreign currency denominated transactions. We record the effective portion of any change in the fair value of foreign currency cash flow hedges in other comprehensive income (OCI) until the related third-party transaction occurs. Once the related third-party transaction occurs, we reclassify the effective portion of any related gain or loss on the foreign currency cash flow hedge to earnings. In the event the hedged forecasted transaction does not occur, or it becomes no longer probable that it will occur, we reclassify the amount of any gain or loss on the related cash flow hedge to earnings at that time. We had currency derivative instruments designated as cash flow hedges outstanding in the contract amount of $2.271 billion as of December 31, 2016 and $1.458 billion as of December 31, 2015.
We recognized net gains of $133 million during 2016 on our cash flow hedges, as compared to $213 million of net gains during 2015, and $105 million of net gains during 2014. All currency cash flow hedges outstanding as of December 31, 2016 mature within 60 months. As of December 31, 2016, $102 million of net gains, net of tax, were recorded in accumulated other comprehensive income (AOCI) to recognize the effective portion of the fair value of any currency derivative instruments that are, or previously were, designated as foreign currency cash flow hedges, as compared to net gains of $145 million as of December 31, 2015. As of December 31, 2016, $63 million of net gains, net of tax, may be reclassified to earnings within the next twelve months.
The success of our hedgingcurrency risk management program depends, in part, on forecasts of transaction activityforecast transactions denominated primarily in various currencies (primarily British pound sterling, Euro and Japanese yen).yen. We may experience unanticipated currency exchange gains or losses to the extent that there are differences between forecasted andthe actual activity during periods of currency volatility.is different than forecast. In addition, changes in foreign currency exchange rates related to any unhedged transactions may impact our earnings and cash flows.
Non-designated Foreign Currency Contracts
Derivative Designations and Hedging Relationships

Certain of our currency derivative instruments are designated as cash flow hedges under FASB ASC Topic 815, Derivatives and Hedging, and are intended to protect the U.S. dollar value of forecasted transactions. The gain or loss on a derivative instrument designated as a cash flow hedge is recorded in the Net change in derivative financial instruments component of Other comprehensive income (loss), net of tax (OCI) on our consolidated statements of comprehensive income (loss) until the underlying third-party transaction occurs. When the underlying third-party transaction occurs, we recognize the gain or loss in earnings within the Cost of products sold caption of our consolidated statements of operations. In the event the hedging relationship is no longer effective, or if the hedged forecast transaction becomes no longer probable of occurring, we reclassify the gains or losses within AOCI to earnings at that time.

We usealso designate certain currency forward contracts as net investment hedges to hedge a portion of our net investments in certain of our entities with functional currencies denominated in the Euro, Swiss franc, and Japanese yen. We have elected to use the spot method to assess effectiveness for our derivatives that are designated as net investment hedges. Under the spot method, the change in fair value attributable to changes in the spot rate is recorded in the Foreign currency translation adjustment (CTA) component of OCI. We have elected to exclude the spot-forward difference from the assessment of hedge effectiveness and are amortizing this amount separately, as calculated at the date of designation, on a straight-line basis over the term of the currency forward contracts. Amortization of the spot-forward difference is then reclassified from AOCI to current period earnings as a reduction to Interest expense on our consolidated statements of operations.

We also use forward currency contracts that are not part of designated hedging relationships under FASB ASC Topic 815 as a part of our strategy to manage our exposure to currency exchange rate risk related to foreign currency denominated monetary assets and liabilities.liabilities and related forecast transactions. These non-designated currency forward contracts are not designated as cash flow, fair value or net investment hedges under FASB ASC Topic 815;have an original time to maturity consistent with the hedged currency transaction exposures, generally less than one year, and are marked-to-market with changes in fair value recorded to earnings; and are entered into for periods consistent withearnings within the Other, net caption of our consolidated statements of operations.

Certain of our non-designated forward currency transaction exposures, generally less than one year. We had currency derivative instruments not designated as hedges under FASB ASC Topic 815contracts outstanding in the contract amount of $1.830 billion as of December 31, 2016 and $2.0902018, relate to hedging a portion of the purchase price of the proposed BTG Acquisition ($2.550 billion notional value as of December 31, 2015.2018). During the first quarter of 2019, we entered into additional non-designated forward currency contracts, after which our combined notional value is £3.311 billion, which represents the full purchase price for the proposed BTG Acquisition.

Interest Rate HedgingDerivative Instruments
Risk Management Strategy

Our interest rate risk relates primarily to U.S. dollar borrowings partially offset by U.S. dollar cash investments. We have historically useduse interest rate derivative instruments to manage our earnings and cash flow exposure to changes in interest ratesrates. Under these agreements we and the counterparty, at specified intervals, exchange the difference between fixed and floating interest amounts calculated by converting fixed-rate debt into floating-rate debt or floating-rate debt into fixed-rate debt. We had no interest rate derivative instruments outstanding as of December 31, 2016 and December 31, 2015.
reference to an agreed-upon notional principal amount. We designate these derivative instruments either as fair value or cash flow hedges under in accordance with FASB ASC Topic 815815.

Derivative Designations and Hedging Relationships

. We recordCertain of our interest rate derivative instruments are designated as cash flow hedges and are intended to manage our earnings and cash flow exposure to changes in the valuebenchmark interest rate in connection with the forecasted issuance of fair valuefixed-rate debt. During the fourth quarter of 2018, we entered into interest rate derivative contracts, designated as cash flow hedges, inhaving a notional amount of $1.000 billion to hedge interest expense, which is generally offset byrate risk. We record the changes in the fair value of the hedged debt obligation. Interest payments made or received related to our interest rate derivative instruments are included in interest expense. We record the effective portion of any change in the fair value of derivative instruments designated as cash flow hedges as unrealized gains or losses in derivatives within OCI net of tax, until the underlying hedged cash flowtransaction occurs, at which pointtime we recognize the effective portion of any gain or loss is reclassified to earnings. We recordwithin Interest expense over the ineffective portion of our cash flow hedges in interest expense. In the eventsame period that the hedged cash flow does not occur,items affect earnings, so long as the hedge relationship remains effective. If we determine the hedging relationship is no longer effective, or itif the hedged forecast transaction becomes no longer probable that it will occur,of occurring, we reclassify the amount of any gaingains or loss on the related cash flow hedgelosses from AOCI to interest expenseearnings at that time.
During Prior to the first quarteradoption of 2015, we terminated interest rate derivative contracts designated as fair value hedges having a notional amount of $450 million to convert fixed-rate debt into floating-rate debtASC Update No. 2017-12, Derivatives and received total proceeds of approximately $35 million, which included approximately $7 million of net accrued interest receivable. We assessed at inception, and re-assessed on an

ongoing basis, whetherHedging (Topic 815), the interest rate derivative contracts were highly effectiveineffective portion, if any, was recognized in offsetting changesearnings in the fair value ofperiod in which the hedged fixed rate debt. We had no fair value hedges outstanding during 2016 and recognized no gains or losses in interest expense during 2016. During 2015, we recognized, in interest expense, an $8 million loss on our hedged debt and an $8 million gain on the related interest rate derivatives contracts. This resulted in immaterial net gains recorded in earning due to ineffectiveness in 2015.hedging relationship exhibited ineffectiveness.
During the second quarter of 2015, we entered into forward starting interest rate derivative contracts having a notional amount of $450 million to hedge interest rate risk associated with a planned issuance of fixed-rate senior notes, which we designated as cash flow hedges. These hedges were terminated during the second quarter at the time we issued the fixed-rate senior notes and we received total proceeds of approximately $11 million. We had no amount outstanding under these hedges as of December 31, 2016 and December 31, 2015. We assessed, at inception, and re-assessed, on an ongoing basis, whether the cash flow derivative contracts were highly effective in offsetting changes in interest rates. The gain on this derivative contract was recorded within accumulated other comprehensive income, and is being amortized into earnings as a reduction to interest expense over the life of the related senior notes.

We are amortizing the gains and losses on previously terminated interest rate derivative instruments including fixed-to-floatingthat were designated as cash flow hedges and are reclassifying the amortization of the gains or losses from AOCI into earnings as a component of Interest expense over the same period that the hedged items affect earnings, so long as the hedge relationship remains effective. The balance of the deferred gains on our terminated cash flow hedges within AOCI was immaterial as of December 31, 2018 and December 31, 2017. We recognized immaterial gains in Interest expense relating to the amortization of the terminated cash flow hedges in the current and prior periods.

We had no interest rate contractsderivative instruments designated as fair value hedges outstanding as of December 31, 2018 and December 31, 2017. We previously terminated interest rate derivative instruments that were designated as fair value hedges and forward starting interest rate derivative contracts and treasury locks designated as cash flow hedgesare recognizing the amortization of the gains or losses originally recorded within the Long-term debt caption on our consolidated balance sheets into earnings as a component of interestInterest expense over the remaining termsame period that the discount or premium associated with the hedged items affect earnings. In the event that we designate outstanding interest rate derivative instruments as fair value hedges, we record the changes in the fair values of interest rate derivatives designated as fair value hedges and of the underlying hedged debt instruments in accordance with Topic 815.Interest expense, which generally offset. The carrying amountbalance of certain ofthe deferred gains on our senior notes included unamortized gains ofterminated fair value hedges within $51 millionLong-term debt was immaterial as of December 31, 20162018 and December 31, 2017. We recognized immaterial gains in $63 millionInterest expense relating to the amortization of the terminated fair value hedges in the current and prior periods.

The following table presents the contractual amounts of our derivative instruments outstanding:
(in millions) FASB ASC Topic 815 Designation As of
 December 31, 2018 December 31, 2017
Forward currency contracts Cash flow hedge $3,962
 $3,252
Forward currency contracts Net investment hedge 1,483
 
Forward currency contracts Non-designated 5,880
 2,671
Interest rate derivative contracts Cash flow hedge 1,000
 
Total Notional Outstanding   $12,326
 $5,923

The remaining time to maturity as of December 31, 2015, and immaterial unamortized losses as of December 31, 2016 and December 31, 2015. In addition, we had pre-tax net gains2018 is within AOCI related to terminated60 months for all designated forward starting interest rate derivativecurrency contracts and treasury locks of $9 million as of December 31, 2016, and $10 million as of December 31, 2015. The net gains that we recognized in earnings related to previously terminated interest rate derivatives were $13 million in 2016, $13 million in 2015, and $9 million in 2014. As of December 31, 2016, $13 million of net gains may be reclassified to earnings within the next twelve months from amortization of our previously terminated interest rate derivativegenerally less than one year for all non-designated forward currency contracts.
Counterparty Credit Risk
We do not have significant concentrations of credit risk arising from our derivative financial instruments, whether from an individual counterparty or a related group of counterparties. We manage our concentration of counterparty credit risk on our derivative instruments by limiting acceptable counterparties to a diversified group of major financial institutions with investment grade credit ratings, limiting the amount of credit exposure to each counterparty, and by actively monitoring their credit ratings and outstanding fair values on an on-going basis. Furthermore, none of our derivative transactions are subject to collateral or other security arrangements and none contain provisions that are dependent on our credit ratings from any credit rating agency.
We also employ master netting arrangements that reduce our counterparty payment settlement risk on any given maturity date to the net amount of any receipts or payments due between us and the counterparty financial institution. Thus, the maximum loss due to counterparty credit risk is limited to the unrealized gains in such contracts net of any unrealized losses should any of these counterparties fail to perform as contracted. Although these protections do not eliminate concentrations of credit risk, as a result of the above considerations, we do not consider the risk of counterparty default to be significant.

Fair Value of Derivative Instruments
The following presents the effect of our derivative instruments designated as cash flow and net investment hedges under FASB ASC Topic 815 on our accompanying consolidated statements of operations during 2016, 2015 and 2014 (in millions):

operations. Refer to
Note P – Changes in Other Comprehensive Income for the total amounts relating to derivative instruments presented within the consolidated statements of comprehensive income (loss).
 
Amount of Pre-tax
Gain (Loss)
Recognized in OCI
(Effective Portion)
 
Amount of Pre-tax
Gain (Loss)
Reclassified from
AOCI into Earnings
(Effective Portion)
 
Location in Statement of
Operations
Year Ended December 31, 2016     
Interest rate contracts$
 $1
 Interest expense
Currency hedge contracts65
 133
 Cost of products sold
 $65
 $134
  
Year Ended December 31, 2015     
Interest rate contracts$11
 $2
 Interest expense
Currency hedge contracts98
 213
 Cost of products sold
 $109
 $215
  
Year Ended December 31, 2014     
Interest rate contracts$
 $1
 Interest expense
Currency hedge contracts227
 105
 Cost of products sold
 $227
 $106
  
 Effect of Hedging Relationships on Accumulated Other Comprehensive Income
 Amount Recognized in OCI on Derivative Consolidated Statements of Operations (1) Amount Reclassified from AOCI into Earnings
 Pre-Tax Gain (Loss)Tax Benefit (Expense)Gain (Loss) Net of Tax Location of Amount ReclassifiedTotal Amount of Line Item Presented Pre-Tax (Gain) LossTax (Benefit) Expense(Gain) Loss Net of Tax
Year Ended December 31, 2018
Forward currency contracts        
Cash flow hedges$167
$(38)$130
 Cost of products sold$2,813
 $19
$(4)$15
Net investment hedges (2)56
(13)43
 Interest expense241
 (27)6
(21)
Interest rate derivative contracts        
Cash flow hedges(44)10
(34) Interest expense241
 (1)
(1)
Year Ended December 31, 2017
Forward currency contracts        
Cash flow hedges$(101)$37
$(65) Cost of products sold$2,593
 $(64)$23
$(41)
Interest rate derivative contracts        
Cash flow hedges


 Interest expense229
 (1)
(1)
Year Ended December 31, 2016
Forward currency contracts        
Cash flow hedges$65
$(23)$40
 Cost of products sold$2,424
 $(133)$48
$(84)
Interest rate derivative contracts        
Cash flow hedges


 Interest expense233
 (1)
(1)
(1)
In all periods presented in the table above, the pre-tax (gain) loss amounts reclassified from AOCI to earnings represent the effect of the hedging relationships on earnings. All other amounts included in earnings related to hedging relationships were immaterial.
(2)
For our outstanding net investment hedges, the net gain or loss reclassified from AOCI to earnings as a reduction of Interest expense represents the straight-line amortization of the excluded component as calculated at the date of designation. This initial value of the excluded component has been excluded from the assessment of effectiveness in accordance with FASB ASC Topic 815. In the current period, we did not recognize any gains or losses on the components included in the assessment of hedge effectiveness in AOCI or earnings.

The amountAs of gain (loss) recognized inDecember 31, 2018, pre-tax net gains or losses for our derivative instruments designated, or previously designated, as cash flow and net investment hedges under FASB ASC Topic 815 that may be reclassified from AOCI to earnings related towithin the ineffective portion of hedging relationships was immaterial in all periods presented.next twelve months are presented below (in millions):
Designated Derivative InstrumentFASB ASC Topic 815 DesignationLocation on Consolidated Statements of OperationsAmount of Pre-Tax Gain (Loss) that may be Reclassified to Earnings
Forward currency contractsCash flow hedgeCost of products sold56
Forward currency contractsNet investment hedgeInterest expense41
Interest rate derivative contractsCash flow hedgeInterest expense(43)


Net gains and losses on currency hedge contracts not designated as hedging instruments were offset by net gains and losses and gains from foreign currency transaction exposures as shown in the following table:

are presented below:
(in millions)   
Location in Statement of
Operations
 Year Ended December 31, 
 2016 2015 2014  
Gain (loss) on currency hedge contracts $(20) $48
 $52
 Other, net
Gain (loss) on foreign currency transaction exposures 7
 (69) (70) Other, net
Net foreign currency gain (loss) $(13) $(21) $(18)  
(in millions) Location on Consolidated Statements of Operations Year Ended December 31,
  2018 2017 2016
Net gain (loss) on currency hedge contracts Other, net $41
 $(25) $(20)
Net gain (loss) on currency transaction exposures Other, net (30) 10
 7
Net currency exchange gain (loss)   $11
 $(15) $(13)

Fair Value Measurements

FASB ASC Topic 815 requires all derivative instruments to be recognized at their fair values as either assets or liabilities on the balance sheet. We determine the fair value of our derivative instruments using the framework prescribed by FASB ASC Topic 820,Fair Value Measurements and Disclosures, byand considering the estimated amount we would receive or pay to transfer these instruments at the reporting date and by taking into accountwith respect to current interestcurrency exchange rates, foreign currency exchangeinterest rates, the creditworthiness of the counterparty for the assetsunrealized gain positions and our own creditworthiness for liabilities.unrealized loss positions. In certain instances, we may utilize financial models to measure fair value.value of our derivative instruments. In doing so, we use inputs that include quoted prices for similar assets or liabilities in active markets;markets, quoted prices for identical or similar assets or liabilities in markets that are not active;active, other observable inputs for the asset or liability;liability and inputs derived principally from, or corroborated by, observable market data by correlation or other means. As of December 31, 2016 we have classified all of our derivative assets and liabilities within Level 2 of the fair value hierarchy prescribed by Topic 820, as discussed below, because these observable inputs are available for substantially the full term of our derivative instruments.

The following are the balances of our derivative assets and liabilities as of December 31, 2016 and December 31, 2015:

liabilities:
  As of
  December 31, December 31,
(in millions)Location in Balance Sheet (1)2016 2015
Derivative Assets:    
Designated Hedging Instruments    
Currency hedge contractsOther current assets$98
 $138
Currency hedge contractsOther long-term assets65
 66
  163
 204
Non-Designated Hedging Instruments    
Currency hedge contractsOther current assets36
 33
Total Derivative Assets $199
 $237
     
Derivative Liabilities:    
Designated Hedging Instruments    
Currency hedge contractsOther current liabilities$3
 $1
Currency hedge contractsOther long-term liabilities4
 
  7
 1
Non-Designated Hedging Instruments    
Currency hedge contractsOther current liabilities19
 22
Total Derivative Liabilities $26
 $23
(in millions) 
Location on Consolidated Balance Sheets (1)
 As of
 December 31, 2018 December 31, 2017
Derivative Assets:      
Designated Derivative Instruments      
Forward currency contracts Other current assets $55
 $7
Forward currency contracts Other long-term assets 183
 57
    237
 64
Non-Designated Derivative Instruments      
Forward currency contracts Other current assets 67
 18
Total Derivative Assets   $304
 $82
       
Derivative Liabilities:      
Designated Derivative Instruments      
Forward currency contracts Other current liabilities $2
 $37
Forward currency contracts Other long-term liabilities 3
 33
Interest rate contracts Other current liabilities 44
 
    49
 69
Non-Designated Derivative Instruments      
Forward currency contracts Other current liabilities 31
 21
Total Derivative Liabilities   $80
 $90
(1)We classify derivative assets and liabilities as current when the remaining termsettlement date of the derivative contract is one year or less.

Other Fair Value Measurements
Recurring Fair Value Measurements
On a recurring basis, we measure certain financial assets and financial liabilities at fair value based upon quoted market prices, where available.prices. Where quoted market prices or other observable inputs are not available, we apply valuation techniques to estimate fair value. FASB ASC Topic 820 establishes a three-level valuation hierarchy for disclosure of fair value measurements. The categorizationcategory of a financial assets andasset or a financial liabilitiesliability within the valuation hierarchy is based upon the lowest level of input that is significant to the measurement of fair value. The three levels of the hierarchy are defined as follows:
Level 1 – Inputs to the valuation methodology are quoted market prices for identical assets or liabilities.
Level 2 – Inputs to the valuation methodology are other observable inputs, including quoted market prices for similar assets or liabilities and market-corroborated inputs.
Level 3 – Inputs to the valuation methodology are unobservable inputs based on management’s best estimate of inputs market participants would use in pricing the asset or liability at the measurement date, including assumptions about risk.

Assets and liabilities measured at fair value on a recurring basis consist of the following as of December 31, 2016 and December 31, 2015:following:
As of
As of December 31, 2016 As of December 31, 2015December 31, 2018 December 31, 2017
(in millions)Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalLevel 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total
Assets                  
        
    
Money market and government funds$42
 $
 $
 $42
 $118
 $
 $
 $118
$13
 $
 $
 $13
 $21
 $
 $
 $21
Available-for-sale-securities20
 
 
 20
 
 
 
 
Currency hedge contracts
 199
 
 199
 
 237
 
 237
Publicly-held securities
 
 
 
 15
 
 
 15
Derivative Instruments
 304
 
 304
 
 82
 
 82
$62
 $199
 $
 $261
 $118
 $237
 $
 $355
$14
 $304
 $
 $318
 $36
 $82
 $
 $118
Liabilities                              
Currency hedge contracts$
 $26
 $
 $26
 $
 $23
 $
 $23
Accrued contingent consideration
 
 204
 $204
 
 
 246
 246
Derivative Instruments$
 $80
 $
 $80
 $
 $90
 $
 $90
Contingent consideration liability
 
 347
 347
 
 
 169
 169
$
 $26
 $204
 $230
 $
 $23
 $246
 $269
$
 $80
 $347
 $427
 $
 $90
 $169
 $259

Our investments in money market and government funds are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices. These investments are classified as cashCash and cash equivalents within our accompanying consolidated balance sheets, in accordance with U.S. GAAP and our accounting policies. In addition to $42$13 million invested in money market and government funds as of December 31, 2016,2018, we had $19 million in short-term time deposits and $135$133 million in interest bearing and non-interest bearingnon-interest-bearing bank accounts. In addition to $118$21 million invested in money market and government funds as of December 31, 2015,2017, we had $31$167 million in short-term time deposits and $170 million in interest bearing and non-interest bearing bank accounts.

On December 1, 2016, we signed a subscription agreement to acquire 11,817,000 shares of Neovasc’s common stock for $0.60 per share or $7 million. The subscription agreement was accounted for as a derivative forward contract, in accordance with FASB ASC Topic 815, until the settlement date. On December 12, 2016, the contract was settled, and we acquired the shares of Neovasc’s common stock for $7 million. The fair value of the shares purchased on the settlement date was $26 million.  Therefore, we recognized a gain of $12 million, net of tax, in earnings on the forward contract during 2016. Subsequently, we are accounting for the investment as an available-for-sale security, in accordance with FASB ASC Topic 320.
Our recurring fair value measurements using significant unobservableLevel 3 inputs (Level 3) relate solely to our contingent consideration liability. Refer to Note B – Acquisitions and Strategic Investmentsfor a discussion of the changes in the fair value of our contingent consideration liability and additional details on our Neovasc strategic investment.liability.

Non-Recurring Fair Value Measurements

We hold certain assets and liabilities that are measured at fair value on a non-recurring basis in periods subsequent toafter initial recognition. The fair value of a cost methodmeasurement alternative investment is not estimated if there are no identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment. Refer to Note B - Acquisitions and Strategic Investments for a discussion of our strategic investments.

Refer to Note C - Goodwill and Other Intangible Assets for a discussion of the fair values.

The fair value of our outstanding debt obligations was $5.739$7.239 billion as of December 31, 20162018 and $5.887$5.945 billion as of December 31, 2015, which was2017. We determined fair value by using quoted market prices for our publicly-registeredpublicly registered senior notes, classified as Level 1 within the fair value hierarchy.hierarchy, amortized cost for commercial paper and face value for term loans and credit facility borrowings outstanding. Refer to Note FE – Borrowings and Credit Arrangements for a discussion of our debt obligations.


NOTE FE – BORROWINGS AND CREDIT ARRANGEMENTS

We had total debt of $5.484$7.056 billion as of December 31, 20162018 and $5.677$5.616 billion as of December 31, 2015.2017. The debt maturity schedule for the significant components of our long-term debt obligations as of December 31, 2016 is as follows:

presented below:
(in millions)2017 2018 2019 2020 2021 Thereafter Total
Senior notes$250
 $600
 $
 $1,450
 $
 $2,350
 $4,650
Term loans
 225
 150
 375
 
 
 750
 $250
 $825
 $150
 $1,825
 $
 $2,350
 $5,400
  Issuance Date Maturity Date As of December 31, Semi-annual Coupon Rate
(in millions, except interest rates)   2018 2017 
January 2020 Notes December 2009 January 2020 $850
 $850
 6.000%
May 2020 Notes May 2015 May 2020 600
 600
 2.850%
May 2022 Notes May 2015 May 2022 500
 500
 3.375%
October 2023 Notes August 2013 October 2023 450
 450
 4.125%
May 2025 Notes May 2015 May 2025 750
 750
 3.850%
March 2028 Notes February 2018 March 2028 1,000
 
 4.000%
November 2035 Notes (1) November 2005 November 2035 350
 350
 7.000%
January 2040 Notes December 2009 January 2040 300
 300
 7.375%
Unamortized Debt Issuance Discount
and Deferred Financing Costs
   2020 - 2040 (29) (24)  
Unamortized Gain on Fair Value Hedges   2020-2025 26
 38
  
Capital Lease Obligation   Various 6
 1
  
Long-term debt     $4,803
 $3,815
  
Note: The table above does not include unamortized amounts related to interest rate contracts designated as cash flow hedges.
(1)Note:Corporate credit rating improvements may result in a decrease in the adjusted interest rate on our November 2035 Notes to the extent that our lowest credit rating is above BBB- or Baa3. The table above does not include unamortized discounts associated withinterest rates on our November 2035 Notes will be permanently reinstated to the issuance rate if the lowest credit ratings assigned to these senior notes is either A- or amounts related to interest rate contracts used to hedge the fair value of certain of our senior notesA3 or debt issuance costs.higher.

Revolving Credit Facility

On April 10, 2015,December 19, 2018, we entered into a new $2.000$2.750 billion revolving credit facility (the 20152018 Facility) with a global syndicate of commercial banks and terminated our previous $2.000$2.250 billion revolving credit facility.facility (the 2017 Facility), which was scheduled to mature in August 2022. The 20152018 Facility matureswill mature on April 10, 2020.December 19, 2023 with one-year extension options subject to certain conditions. Eurodollar and multicurrency loans under the 2015 Facility bear interest at LIBORthe Eurocurrency Rate determined for the interest period plus anthe applicable margin, based on our corporate credit ratings (1.02 percent as of December 31, 2018). ABR loans bear interest at ABR plus the applicable margin of between 0.900 percent and 1.500up to 0.40 percent, based on our corporate credit ratings and consolidated leverage ratio (1.300 percent as of December 31, 2016). In addition,ratings. Under the credit agreement for the 2018 Facility (the 2018 Credit Agreement), we are required to pay a facility fee (0.11 percent as of December 31, 2018) based on our credit ratings consolidated leverage ratio, and the total amount of revolving credit commitments,commitment, regardless of usage underof the agreement (0.200 percent as of December 31, 2016). The 2015 Facility contains covenants which, among other things, require that we maintain a minimum interest coverage ratio of 3.0 times consolidated EBITDA and a maximum leverage ratio of 4.5 times consolidated EBITDA2018 Facility. This facility provides backing for the first four fiscal quarter-ends following the closing of the AMS Portfolio Acquisition on August 3, 2015, and decreasing to 4.25 times, 4.00 times, and 3.75 times consolidated EBITDA for the next three fiscal quarter-ends after such four fiscal quarter-ends, respectively, and then to 3.50 times for each fiscal quarter-end thereafter.commercial paper program described below. There were no amounts borrowed under our current andor prior revolving credit facilities as of December 31, 20162018 or December 31, 2015.2017.
Our revolving credit
Bridge Facility

On November 20, 2018, we entered into the Bridge Facility in aggregate principal amount of £3.315 billion for the purpose of financing the proposed BTG Acquisition. The Bridge Facility is comprised of a £3.115 billion debt bridge facility, agreementborrowings under which mature 364 days from the date of the first borrowing under the Bridge Facility, and a £200 million cash bridge facility, borrowings under which mature 90 days from the date of the first borrowing under the Bridge Facility. Borrowings are available in placeBritish pound sterling or U.S. dollar and bear interest at the LIBOR for borrowings in British pound sterling or U.S. dollar, as applicable, or the base rate for borrowings in U.S. dollars, in each case plus an applicable margin based on our public debt ratings. The Bridge Facility also provides for customary ticking fees based on our public debt ratings and duration fees. The Bridge Facility requires that we maintain certain financial covenants, as described within Debt Covenants below. The Bridge Facility contains customary events of default, which may result in the acceleration of any outstanding commitments and also contains customary United Kingdom (U.K.) certain funds provisions. There were no amounts borrowed under the Bridge Facility as of December 31, 20162018. In December 2018, in connection with our new term loans and currency hedging activities, we reduced the debt bridge

facility by an aggregate amount of £1.569 billion to a remaining available amount of £1.546 billion. Refer to Note B – Acquisitions and Strategic Investments for a discussion of our currency hedging activities.

Term Loans

On December 19, 2018, we entered into the First Amendment to our $1.000 billion Term Loan Credit Agreement (August 2019 Term Loan), which was originally entered into August 20, 2018, which matures on August 19, 2019 and is presented within Current debt obligations in the accompanying consolidated balance sheets. Borrowings under the August 2019 Term Loan bear interest at an annual rate of LIBOR plus 0.65 percent. The August 2019 Term Loan requires that we comply with certain covenants, including financial covenants as described within Debt Covenants below. As of December 31, 2018, we had $1.000 billion outstanding under our August 2019 Term Loan. We used the proceeds from the August 2019 Term Loan to repay a portion of our outstanding commercial paper.

On December 19, 2018, we entered into a $2.000 billion senior unsecured delayed-draw term loan facility consisting of a $1.000 billion two-year delayed draw term loan credit facility maturing in two years from the date of the closing of the proposed BTG Acquisition (Two-Year Delayed Draw Term Loan) and a $1.000 billion three-year delayed draw term loan credit facility maturing in three years from the date of the closing of the proposed BTG Acquisition (Three-Year Delayed Draw Term Loan). Borrowings are available in U.S. dollars and bear interest at LIBOR or a base rate in each case plus an applicable margin based on our public debt ratings. We are required to pay customary ticking fees on the average daily unused commitments based on our public debt ratings. The facilities contain customary representations and covenants, as described within Debt Covenants below. The facilities contain customary events of default, which may result in the acceleration of any outstanding commitments, and also contains customary U.K. certain funds provisions. Any proceeds from the facilities will be available to refinance in part the commitments outstanding under the Bridge Facility, described above, to finance the proposed BTG Acquisition. As of December 31, 2018, we had no amounts borrowed under the Two-Year Delayed Draw Term Loan or the Three-Year Delayed Draw Term Loan.

Debt Covenants

As of and through December 31, 2018, we were in compliance with all the required covenants related to our debt obligations.

All existing credit arrangements described above require that we maintain certain financial covenants, as follows:
 
Covenant
Requirement as of December 31, 20162018
 

Actual as of December 31, 20162018
Maximum leverage ratio (1)4.03.75 times 2.4 times
Minimum interest coverage ratio (2)3.0 times9.82.56 times

(1)Ratio of total debt to consolidated EBITDA, as defined by the credit agreement, for the preceding four consecutive fiscal quarters.
(2)Ratio of consolidated EBITDA, as defined by the credit agreement, to interest expense for the preceding four consecutive fiscal quarters.
The credit agreement(1) Ratio of total debt to consolidated EBITDA, as defined by the agreements, for the 2015 Facility providespreceding four consecutive fiscal quarters.

Our covenants require that we maintain a maximum leverage ratio of 3.75 times, provided, however, that for the two consecutive fiscal quarters ended immediately following the consummation of a Qualified Acquisition, as defined by each agreement below, the maximum leverage ratio shall be 4.75 times, and then subject to a step-down for each succeeding fiscal quarter end to 4.5 times, 4.25 times, 4.00 times and then back to 3.75 times for each fiscal quarter end thereafter. Our covenants provide for an exclusion from the calculation of consolidated EBITDA, as defined by the credit agreement,agreements, through the credit agreement maturity, of any non-cash charges and up to $620$500 million in restructuring charges and restructuring-related expenses related to our current or future restructuring plans. As of December 31, 2016,2018, we had $485$350 million of the restructuring charge exclusion remaining. In addition, any cash litigation payments (net of any cash litigation receipts), as defined by the agreement,agreements, are excluded from the calculation of consolidated EBITDA, and any new debt issued to fund any tax deficiency payments is excluded from consolidated total debt, as defined inby the agreement,agreements, provided that the sum of any excluded net cash litigation payments and any new debt issued to fund any tax deficiency paymentsdo not exceed $2.000$2.624 billion in the aggregate. As of December 31, 2016,2018, we had approximately $885 million$1.191 billion of the combined legal and debt exclusion remaining.
As of
A Qualified Acquisition, as defined by the 2018 Credit Agreement and through December 31, 2016, we were in compliance withAugust 2019 Term Loan, includes but is not limited to the required covenants.proposed BTG Acquisition. A Qualified Acquisition, as defined by the Bridge Facility, Two-Year Delayed Draw Term Loan and Three-Year Delayed Draw Term Loan, is limited to the proposed BTG Acquisition and any other transaction permitted under the Bridge Facility and consummated on or after the Closing date, as defined by the Bridge Facility.

Any inability to maintain compliance with these covenants could require us to seek to renegotiate the terms of our credit facility or seek waivers from compliance with these covenants, both of which could result in additional borrowing costs. Further, there can be no assurance that our lenders would agree to such new terms or grant such waivers.waivers on terms acceptable to us. In this case, all credit facility commitments would terminate, and any amounts borrowed under the facility would become immediately due and payable. Furthermore, any termination of our credit facility may negatively impact the credit ratings assigned to our commercial paper program which may impact our ability to refinance any then outstanding commercial paper as it becomes due and payable.

Term Loans
As of December 31, 2016, we had an aggregate $750 million outstanding under our unsecured term loan facilities and $1.000 billion outstanding under these facilities as of December 31, 2015. These facilities include an unsecured term loan facility entered into in August 2013 (2013 Term Loan) which had $150 million outstanding as of December 31, 2016 and $250 million outstanding as of December 31, 2015, along with an unsecured term loan credit facility entered into in April 2015 (2015 Term Loan) which had $600 million outstanding as of December 31, 2016 and $750 million outstanding as of December 31, 2015.
Borrowings under the 2013 Term Loan bear interest at LIBOR plus an interest margin of between 1.0 percent and 1.75 percent (currently 1.5 percent), based on our corporate credit ratings and consolidated leverage ratio. We repaid $150 million of our 2013 Term Loan facility in the fourth quarter of 2015 and repaid an additional $100 million during the second quarter of 2016. As a result and in accordance with the credit agreement, the outstanding balance of $150 million is the remaining principal amount due at the final maturity date in August 2018.The 2013 Term Loan borrowings are repayable at any time without premium or penalty. Our term loan facility requires that we comply with certain covenants, including financial covenants with respect to maximum leverage and minimum interest coverage, consistent with the 2015 Term Loan Facility. The maximum leverage ratio requirement is 4.0 times, our actual leverage ratio as of December 31, 2016 is 2.4 times, and the minimum interest coverage ratio requirement is 3.0 times, our actual interest coverage ratio as of December 31, 2016 is 9.8 times.Commercial Paper

On April 10, 2015, we entered into a new $750 million unsecured term loan credit facility which matures on August 3, 2020. The 2015 Term Loan was funded on August 3, 2015
 As of December 31,
 2018 2017
Commercial paper outstanding (in millions)
$1,248
 $1,197
Maximum borrowing capacity (in millions)
2,750
 2,250
Borrowing capacity available (in millions)
1,502
 1,053
Weighted average maturity (in days)
27
 38
Weighted average yield3.04% 1.85%

Outstanding commercial paper directly reduces borrowing capacity and was used to partially fundis backed by the AMS Portfolio Acquisition, including the payment of fees and expenses. Term loan borrowings under this facility bear interest at LIBOR plus an interest margin of between 1.00 percent and 1.75 percent (currently 1.50 percent), based on our corporate credit ratings and consolidated leverage ratio. We repaid $150 million of our 2015 Term Loan during the second quarter of 2016. The remaining 2015 Term Loan requires quarterly principal payments of $38 million commencing in the third quarter of 2018 and the remaining principal amount is due at the final maturity date of August 3, 2020. The 2015 Term Loan agreement requires that we comply with certain covenants, including financial covenants with respect to maximum leverage and minimum interest coverage, consistent with our revolving credit facility. The maximum leverage ratio requirement is 4.0 times, our actual leverage ratio as of December 31, 2016 is 2.4 times, and the minimum interest coverage ratio requirement is 3.0 times, our actual interest coverage ratio as of December 31, 2016 is 9.8 times.Facility.

Senior Notes

We had senior notes outstanding of $4.650$4.800 billion as of December 31, 20162018 and $4.400 billion as of December 31, 2015. 2017.

In May 2015,February 2018, we completed thean offering of$1.850 $1.000 billion in aggregate principal amount of 4.000% senior notes, consisting of $600 million in aggregate principal amount of 2.850% notes due 2020, $500 million in aggregate principal amount of 3.375% notes due 2022 and $750 million in aggregate principal amount of 3.850% notes due 2025. The net proceeds from the offering of the notes, after deducting underwriting discounts and estimated offering expenses, were approximately $1.830 billion.March 2028. We used a portion of the net proceeds from the offering to repay the $600 million plus accrued interest of our 2.650% senior notes offering to redeem $400 million aggregate principal amountdue in October 2018, which were classified as short-term debt as of our 5.500% notes due November 2015 and $600 million aggregate principal amount of our 6.400% notes due June 2016.December 31, 2017. The remaining senior notes offering proceeds together with the 2015 Term Loan, were used to fund the AMS Portfolio Acquisition. We recordedrepay a chargeportion of $45 million in interest expense, during the second quarter of 2015, for premiums, accelerated amortization of debt issuance costs, and investor discount costs net of interest rate hedge gains related to the early debt extinguishment.our outstanding commercial paper.

Our senior notes were issued in public offerings, are redeemable prior to maturity and are not subject to any sinking fund requirements. Our senior notes are unsecured, unsubordinated obligations and rank on parity with each other. These notes are effectively junior to borrowings under our credit and security facility, to the extent if borrowed by our subsidiaries and to liabilities of our subsidiaries (seeOther Arrangements below).

On January 12, 2017, we used our existing credit facilities to repay the $250 million plus interest of our senior notes due in January 2017.


Our senior notes consist of the following as of December 31, 2016:
 
Amount
(in millions)
 
Issuance
Date
 Maturity Date 
Semi-annual
Coupon Rate
January 2017 Notes$250
 November 2004 January 2017 5.125%
October 2018 Notes600
 August 2013 October 2018 2.650%
January 2020 Notes850
 December 2009 January 2020 6.000%
May 2020 Notes600
 May 2015 May 2020 2.850%
May 2022 Notes500
 May 2015 May 2022 3.375%
May 2025 Notes750
 May 2015 May 2025 3.850%
October 2023 Notes450
 August 2013 October 2023 4.125%
November 2035 Notes350
 November 2005 November 2035 6.250%
January 2040 Notes300
 December 2009 January 2040 7.375%
 $4,650
      

Our $4.050$4.450 billion of senior notes issued in 2009, 2013, 2015 and 20152018 contain a change-in-control provision, which provides that each holder of the senior notes may require us to repurchase all or a portion of the notes at a price equal to 101 percent of the aggregate repurchased principal, plus accrued and unpaid interest, if a rating event, as defined in the indenture, occurs as a result of a change-in-control, as defined in the indenture. Any other credit rating changes may impact our borrowing cost, but do not require us to repay any borrowings.

The interest rate payable on our November 2035 Notes is currently 7.00 percent. Corporate credit rating improvements may result in a decrease in the adjusted interest rate on our November 2035 Notes to the extent that our lowest credit rating is above BBB- or Baa3. The interest rates on our November 2035 Notes will be permanently reinstated to the issuance rate if the lowest credit ratings assigned to these senior notes is either A- or A3 or higher.
Other Arrangements
We maintained a $300
On December 19, 2018 and effective on December 20, 2018, we terminated our $400 million credit and security facility secured by our U.S. trade receivables maturing on June 9, 2017. The credit and security facility required that we maintain a maximum leverage covenant consistent with our revolving credit facility. The maximum leverage ratio requirement was 4.0 times and our actual leverage ratio as of December 31, 2016 was 2.4 times.receivables. We had borrowings of $60 millionno amounts outstanding under this facility as of December 31, 2016 and no borrowings outstanding as of December 31, 2015. On February 7, 2017, we amended the terms of this credit and security facility, including increasing the facility size to $400 million. This amendment retained a similar maximum leverage ratio requirement and extended the facility maturity to February 2019.2017.

We have accounts receivable factoring programs in certain European countries that weand with commercial banks in Japan which include promissory notes discounting programs. We account for our factoring programs as sales under FASB ASC Topic 860, Transfers and Servicing. ServicingThese agreements provide for the sale of accounts receivable to third parties, without recourse, of up to approximately $391 million as of December 31, 2016.. We have no retained interestsinterest in the transferred receivables, other than collection and administrative responsibilitiesadministration, and once sold, the accounts receivable are no longer available to satisfy creditors in the event of bankruptcy. WeAmounts de-recognized $152 million of receivables as of December 31, 2016 at an average interest rate of 1.8 percent, and $151 million as of December 31, 2015 at an average interest rate of 2.4 percent.
In addition, we have uncommitted credit facilities with a commercial Japanese bank that provide for borrowings, promissory notes discounting and receivables factoring of up to 21.0 billion Japanese yen (approximately $180 million as of December 31, 2016). We de-recognized $149 million of notes receivable as of December 31, 2016 at an average interest rate of 1.6 percent and $132 million of notes receivable as of December 31, 2015 at an average interest rate of 1.6 percent. De-recognized accounts and notes receivable, which are excluded from tradeTrade accounts receivable, net in the accompanying consolidated balance sheets.
As of December 31, 2016 and December 31, 2015, we had outstanding letters of credit of $44 million which consisted primarily of bank guarantees and collateral for workers' compensation insurance arrangements. As of December 31, 2016 and 2015, none of the beneficiaries had drawn upon the letters of credit or guarantees; accordingly, we have not recognized a related liability for our outstanding letters of credit in our consolidated balance sheets, as of December 31, 2016 or 2015.
are aggregated by contract denominated currency below (in millions):

 As of December 31, 2018 As of December 31, 2017
Factoring ArrangementsCapacity (1) Amount
De-recognized
 Weighted Average Interest Rate Capacity (1) Amount
De-recognized
 Weighted Average Interest Rate
Euro denominated$474
 $165
 2.7% $456
 $171
 1.8%
Yen denominated (2)273
 195
 0.9% 195
 157
 1.3%
(1)The capacities are translated from local currency to U.S. dollar using the spot rates on the last business day of each period.
(2)The factoring arrangements denominated in Japanese yen consist of two arrangements, one with a maximum capacity of 22.000 billion yen, which has been discontinued in the second quarter of 2018, and a new arrangement with a maximum capacity of 30.000 billion yen entered into in March 2018.

NOTE GF – LEASES AND OTHER PURCHASE OBLIGATIONS
Rent expense amounted to $92 million in 2018, $88 million in 2017 and $80 million in 2016, 2016.$76 million in 2015 and $76 million in 2014.

Future minimum rental commitments as of December 31, 20162018 under all noncancellable lease agreements, including capital leases, were as follows (in millions):follows:
2017$66
201860
(in millions) 
201942
$73
202034
61
202125
47
202239
202331
Thereafter64
111
 
$362
$291
 

Future minimum purchase obligations as of December 31, 2016,2018, were as follows (in millions):follows:
2017$321
201852
(in millions) 
201939
$362
202019
23
202112
12
20223
20232
Thereafter15
7
 $409
$458
 

NOTE HG – RESTRUCTURING-RELATED ACTIVITIES
We monitor
2019 Restructuring Plan

On November 15, 2018, the dynamicsBoard of the economy, the healthcare industry,Directors approved, and the markets in which we competecommitted to a new global restructuring program (the 2019 Restructuring Plan). The 2019 Restructuring Plan is intended to support our effort to improve operating performance and assess opportunities for improved operational effectiveness and efficiency, and better alignment of expenses with revenues, while preserving our ability to make the investments in research and development projects, capital, our peoplemeet anticipated market demands by ensuring that we believe are essentialappropriately structured and resourced to deliver sustainable value to patients and customers. Key activities under the 2019 Restructuring Plan include supply chain network optimization intended to maximize our long-term success. Asglobal manufacturing and distribution network capacity and building functional capabilities that support business growth. These activities are expected to be initiated in 2019, with the majority of activity expected to be complete by the end of 2021.

The following table provides a resultsummary of our estimates of total pre-tax charges associated with the 2019 Restructuring Plan by major type of cost:
Type of CostTotal Estimated Amount Expected to be Incurred
Restructuring charges:
Termination benefits$75 million to $100 million
Other (1)$25 million to $50 million
Restructuring-related expenses:
Other (2)$100 million to $150 million
$200 million to $300 million
(1)Consists primarily of consultant fees and costs associated with contractual cancellations.
(2)Comprised of other costs directly related to the restructuring program, including program management, accelerated depreciation, fixed asset write-offs, and costs to transfer product lines among facilities.

Approximately $180 million to $280 million of these assessments, we have undertaken various restructuring initiativescharges are expected to result in order to enhance our growth potential and position us for long-term success. These initiatives are described below.cash outlays.

2016 Restructuring Plan

On June 6, 2016, our Board of Directors approved, and we committed to a restructuring initiative (the 2016 Restructuring Plan). The 2016 Restructuring Plan is intended to develop global commercialization, technology and manufacturing capabilities in key growth markets, build on our Plant Network Optimization (PNO) strategy which is intended to simplify our manufacturing plant structure by transferring certain production lines among facilities and expand operational efficiencies in support of our operating income margin goals. Key activities under the 2016 Restructuring Plan include strengthening global infrastructure through evolving global real estate assets and workplaces, developing global commercial and technical competencies, enhancing manufacturing and distribution expertise in certain regions and continuing implementation of our PNO strategy. These activities were initiated in the second quarter of 2016 and are expected to be substantiallythe majority of the costs associated with this Plan were completed by the end of 2018.

The implementation We revised the original estimate for the costs and savings associated with the program in the first quarter of 2018, as approved by the 2016 Restructuring Plan is expected to result in total pre-tax chargesBoard of approximately $175 million to $225 million, and approximately $160 million to $210 million of these charges are estimated to result in cash outlays, of which we have made payments of $27 million in 2016. We have recorded related costs of $47 million in 2016, and recorded a portion of these expenses as restructuring charges and the remaining portion through other lines within our consolidated statements of operations.

Directors.

The following table provides a summary of our estimates of coststotal pre-tax charges associated with the 2016 Restructuring Plan through the end of 2018 by major type of cost:
Type of costTotal estimated amount expectedEstimated Amount Expected to be incurredIncurred
Restructuring charges: 
Termination benefits$6580 million to $80$90 million
Other (1)$1525 million to $25$50 million
Restructuring-related expenses: 
Other (2)$95170 million to $120$185 million
 $175275 million to $225$325 million

(1) Consists primarily of consulting fees and costs associated with contract cancellations.
(2) Comprised of other costs directly related to the 2016 Restructuring Plan, including program management, accelerated depreciation, and costs to transfer product lines among facilities.
2014 Restructuring Plan
On October 22, 2013, our Board of Directors approved, and we committed to, a restructuring initiative (the 2014 Restructuring Plan). The 2014 Restructuring Plan built on the progress we made to address financial pressures in a changing global marketplace, further strengthened our operational effectiveness and efficiency and supported new growth investments. Key activities under the plan included continued implementation of our PNO strategy, continued focus on driving operational effectiveness and efficiencies and business and commercial model changes. The PNO strategy simplified our manufacturing plant structure by transferring certain production lines among facilities. Other activities involved rationalizing organizational reporting structures to streamline various functions, eliminate bureaucracy, increase productivity and better align resources to business strategies and marketplace dynamics. These activities were initiated in the fourth quarter of 2013 and were substantially completed by the end of 2015, except for certain actions associated with our PNO strategy, which were completed by the end of 2016.
The implementation of the 2014 Restructuring Plan resulted in total pre-tax charges of $261 million and $244 million of cash outlays. We recorded a portion of these expenses as restructuring charges and the remaining portion through other lines within our consolidated statements of operations.

The following table provides a summary of our total costs associated with the 2014 Restructuring plan through December 31, 2016 by major type of cost:

Type(1)Consists primarily of costconsulting fees and costs associated with contract cancellations.
Total amount incurred
Restructuring charges:
Termination benefits$91 million
Other (1)$34 million
Restructuring-related expenses:
Other (2)$136 million
$261 millionComprised of other costs directly related to the 2016 Restructuring Plan, including program management, accelerated depreciation, fixed asset write-offs and costs to transfer product lines among facilities.

(1) Consists primarilyApproximately $250 million to $300 million of consulting fees and costs associated with contractual cancellations.
(2) Comprised of other costs directly relatedthese charges are estimated to the 2014 Restructuring plan, including program management, accelerated depreciation, and costs to transfer product lines among facilities.
We recorded restructuring charges pursuant to our restructuring plans of $28 million during 2016, $26 million during 2015, and $69 million during 2014. In addition, we recorded expenses within other lines of our accompanying consolidated statements of operations related to our restructuring initiatives of $50 million during 2016, $57 million during 2015, and $48 million during 2014.

result in cash outlays.
The following presents these coststhe restructuring and restructuring-related charges (credits) by major type and line item within our accompanying consolidated statements of operations as well as by program:(in millions):
Year Ended December 31, 2016           
(in millions)
Termination
Benefits
 
Accelerated
Depreciation
 
Transfer
Costs
 Fixed Asset Write-Offs Other Total
Restructuring charges$19
 $
 $
 $2
 $7
 $28
Restructuring-related expenses:           
Cost of products sold
 
 34
 
 
 34
Selling, general and administrative expenses
 5
 
 
 11
 16
 
 5
 34
 
 11
 50
 $19
 $5
 $34
 $2
 $18
 $78
            
(in millions)
Termination
Benefits
 
Accelerated
Depreciation
 
Transfer
Costs
 Fixed Asset Write-Offs Other Total
2016 Restructuring plan$24
 $1
 $15
 $
 $7
 $47
2014 Restructuring plan$(5) $4
 19
 $2
 $11
 $31
 $19
 $5
 $34
 $2
 $18
 $78
            
Year Ended December 31, 2018
Termination
Benefits
 
Transfer
Costs
 Other Total
Restructuring charges$32
 $
 $4
 $36
Restructuring-related expenses:       
Cost of products sold
 47
 
 47
Selling, general and administrative expenses
 
 12
 12
 
 47
 12
 59
 $32
 $47
 $16
 $96

Year Ended December 31, 2015         
(in millions)
Termination
Benefits
 
Accelerated
Depreciation
 
Transfer
Costs
 Other Total
Restructuring charges$23
 $
 $
 $3
 $26
Restructuring-related expenses:         
Cost of products sold
 
 31
 
 31
Selling, general and administrative expenses
 3
 
 23
 26
 
 3
 31
 23
 57
 $23
 $3
 $31
 $26
 $83
          
(in millions)Termination
Benefits
 Accelerated
Depreciation
 Transfer
Costs
 Other Total
2014 Restructuring plan$27
 $3
 $31
 $26
 $87
Substantially complete restructuring plan(4) 
 
 
 (4)
 $23
 $3
 $31
 $26
 $83
          

Year Ended December 31, 2017
Termination
Benefits
 
Transfer
Costs
 Other Total
Restructuring charges$25
 $
 $12
 $37
Restructuring-related expenses:       
Cost of products sold
 45
 
 45
Selling, general and administrative expenses
 
 13
 13
 
 45
 13
 58
 $25
 $45
 $25
 $95


Year Ended December 31, 2014         
(in millions)
Termination
Benefits
 
Accelerated
Depreciation
 Transfer Costs Other Total
Restructuring charges$42
 $
 $
 $27
 $69
Restructuring-related expenses:         
Cost of products sold
 
 24
 
 24
Selling, general and administrative expenses
 5
 
 19
 24
 
 5
 24
 19
 48
 $42
 $5
 $24
 $46
 $117
          
(in millions)Termination
Benefits
 Accelerated
Depreciation
 Transfer Costs Other Total
2014 Restructuring plan$41
 $5
 $24
 $43
 $113
Substantially complete restructuring plan1
 
 
 3
 4
 $42
 $5
 $24
 $46
 $117
          
Year Ended December 31, 2016
Termination
Benefits
 Transfer Costs Other Total
Restructuring charges$19
 $
 $9
 $28
Restructuring-related expenses:       
Cost of products sold
 34
 
 34
Selling, general and administrative expenses
 
 16
 16
 
 34
 16
 50
 $19
 $34
 $25
 $78

Termination benefits represent amounts incurred pursuant to our benefit arrangementsExpenses in 2016 include costs associated with the 2016 Restructuring Plan and amounts for “one-time” involuntary termination benefits, and have been recorded in accordanceexpenses associated with FASB ASC Topic 712 and FASB ASC Topic 420. Other restructuring costs, which represent primarily consulting fees and costs related to contract cancellations, are being recorded as incurred in accordance with FASB ASC Topic 420. Accelerated depreciation is being recorded over the adjusted remaining useful life of the related assets and production line transfer costs are being recorded as incurred.other substantially completed plans.

AsThe following table presents cumulative restructuring and restructuring-related charges incurred as of December 31, 2016, we have incurred cumulative restructuring charges2018, related to our 2016 Restructuring Plan and our 2014 Restructuring Plan of $153 million and restructuring-related costs of $155 million since we committed to the plans. The following presents these costs by major type and by plan:type:
(in millions)2016 Restructuring Plan 2014 Restructuring Plan Total
Termination benefits24 $91
 $115
Fixed asset write-offs
 2
 2
Other4
 32
 36
Total restructuring charges28
 125
 153
Accelerated depreciation1
 12
 13
Transfer costs15
 75
 90
Other3
 49
 52
Restructuring-related expenses19
 136
 155
 $47
 $261
 $308
(in millions)2016 Restructuring Plan
Termination benefits$81
Other (1)20
Total restructuring charges100
Transfer costs107
Other (2)28
Restructuring-related charges136
 $236
(1)Consists primarily of consulting fees and costs associated with contract cancellations.
(2)Comprised of other costs directly related to our Restructuring Plans, including program management, accelerated depreciation, fixed asset write-offs and costs to transfer product lines among facilities.

We made cashCash payments of $82 million in 2016 associated with restructuring initiatives, and as of December 31, 2016 we had made total cash payments of $271 million related to our 2016 Restructuring Plan and 2014 Restructuring Plan since committing to the plans. These payments were made using cash generated from operations and are comprised of the following:

(in millions)2016 Restructuring Plan 2014 Restructuring Plan Total2016 Restructuring Plan
Year Ended December 31, 2016     
Year Ended December 31, 2018 
Termination benefits8
 $24
 $32
$32
Transfer costs15
 19
 34
47
Other4
 12
 16
20
$27
 $55
 $82
$100
     
Program to Date     
Termination benefits8
 93
 $101
Transfer costs15
 74
 89
Other4
 77
 81
$27
 $244
 $271
Our restructuring liability is primarily comprised of accruals for termination benefits. The following is a rollforward of the termination benefit liability associated with our 2016 Restructuring Plan, our 2014 Restructuring Plan and our substantially complete restructuring plan, which is reported as a component of accrued expenses included in our accompanying consolidated balance sheets:
 Restructuring Plan Termination Benefits
(in millions)2016 Restructuring Plan 2014 Restructuring Plan Substantially complete restructuring plan Total
Accrued as of December 31, 2014
 39
 4
 43
Charges
 27
 (4) 23
Cash payments
 (37) 
 (37)
Accrued as of December 31, 2015
 29
 
 29
Charges24
 (5) 
 19
Cash payments(8) (24) 
 (32)
Accrued as of December 31, 2016$16
 $
 $
 $16

In addition to our accrual for termination benefits, we had a $6 million liability as of December 31, 2016 and a $3 million liability as of December 31, 2015 for other restructuring-related items.

NOTE IH – SUPPLEMENTAL BALANCE SHEET INFORMATION

Components of selected captions in our accompanying consolidated balance sheets are as follows:
Trade accounts receivable, net
 As ofAs of
(in millions) December 31, 2016December 31, 2015December 31, 2018 December 31, 2017
Accounts receivable $1,591
$1,394
$1,676
 $1,645
Less: allowance for doubtful accounts (73)(75)
Less: allowance for sales returns (46)(44)
Allowance for doubtful accounts(68) (68)
Allowance for sales returns (1)
 (30)
 $1,472
$1,275
$1,608
 $1,548
(1)
Due to the adoption of FASB ASC Topic 606 effective January 1, 2018, the allowance for sales returns has been prospectively reclassified from Trade accounts receivable, net to Other current liabilities within the consolidated balance sheets. Prior period balances remain unchanged.

The following is a rollforward of our allowance for doubtful accounts for 2016, 2015 and 2014:accounts:
 Year Ended December 31,Year Ended December 31,
(in millions) 2016201520142018 2017 2016
Beginning balance $75
$76
$81
$68
 $73
 $75
Net charges to expenses 9
15
10
19
 14
 9
Utilization of allowances (11)(16)(15)(19) (18) (11)
Ending balance $73
$75
$76
$68
 $68
 $73

Inventories
 As ofAs of
(in millions) December 31, 2016December 31, 2015December 31, 2018 December 31, 2017
Finished goods $625
$706
$760
 $685
Work-in-process 94
102
100
 110
Raw materials 236
208
306
 284
 $955
$1,016
$1,166
 $1,078
Prepaids and other current assets
  As of
(in millions) December 31, 2016December 31, 2015
Prepaid expenses $58
$57
Restricted cash 243
54
Other 240
254
  $541
$365

Property, plant and equipment, net
 As ofAs of
(in millions) December 31, 2016December 31, 2015December 31, 2018 December 31, 2017
Land $91
$86
$97
 $102
Buildings and improvements 981
981
1,100
 1,120
Equipment, furniture and fixtures 2,955
2,793
3,224
 3,183
Capital in progress 338
202
319
 219
 4,365
4,062
4,740
 4,625
Less: accumulated depreciation 2,735
2,572
2,958
 2,928
 $1,630
$1,490
$1,782
 $1,697

Depreciation expense was $296 million in 2018, $279 million in 2017 and $270 million in 2016.

Accrued expenses
 As ofAs of
(in millions) December 31, 2016December 31, 2015December 31, 2018 December 31, 2017
Legal reserves $1,062
$773
$712
 $1,176
Payroll and related liabilities 572
504
630
 591
Accrued contingent consideration 63
119
138
 36
Other 615
574
767
 653
 $2,312
$1,970
$2,246
 $2,456

Other long-term liabilities
 As ofAs of
(in millions) December 31, 2016December 31, 2015December 31, 2018 December 31, 2017
Accrued income taxes $781
$1,253
$739
 $1,275
Legal reserves 961
1,163
217
 436
Accrued contingent consideration 141
127
209
 133
Other long-term liabilities 455
431
Other717
 525
 $2,338
$2,974
$1,882
 $2,370

NOTE I – INCOME TAXES


NOTE J – INCOME TAXES
Our incomeIncome (loss) before income taxes consisted of the following:
 Year Ended December 31,Year Ended December 31,
(in millions) 2016201520142018 2017 2016
Domestic $(1,019)$(1,623)$(1,263)$35
 $(408) $(1,019)
Foreign 1,196
973
754
1,387
 1,341
 1,196
 $177
$(650)$(509)$1,422
 $933
 $177

The related benefit for income taxes consisted of the following:
 Year Ended December 31,Year Ended December 31,
(in millions) 2016201520142018 2017 2016
Current       
Federal $31
$59
$(2)$(221) $320
 $31
State 6
3
(5)(27) 9
 6
Foreign 136
132
111
160
 255
 136
 173
194
104
(87) 584
 173
       
Deferred       
Federal (337)(545)(458)(124) 272
 (337)
State (14)(41)(23)4
 1
 (14)
Foreign 8
(19)(13)(42) (28) 8
 (343)(605)(494)(162) 244
 (343)
 $(170)$(411)$(390)$(249) $828
 $(170)

The reconciliation of income taxes at the federal statutory rate to the actual benefit for income taxes is as follows:
Year Ended December 31,
 Year Ended December 31,2018 2017 2016
 201620152014  
(reclassified)(1)
 
(reclassified)(1)
U.S. federal statutory income tax rate 35.0 %(35.0)%(35.0)%21.0 % 35.0 % 35.0 %
State income taxes, net of federal benefit (1.7)%(4.8)%(6.5)%0.4 % (1.0)% (2.1)%
Domestic taxes on foreign earnings0.5 % 0.4 % 0.5 %
Effect of foreign taxes (99.1)%(34.4)%(29.1)%(8.3)% (38.9)% (142.1)%
Acquisition-related 9.4 %6.0 %(7.5)%2.1 % (1.7)% 11.3 %
Research credit (15.0)%(4.4)%(7.0)%(2.6)% (2.6)% (15.5)%
Valuation allowance (42.2)%2.3 %4.0 %(5.2)% (4.1)% (42.2)%
Compensation-related 6.4 %1.6 %0.7 %(1.0)% (2.5)% 6.4 %
Non-deductible expenses 9.3 %2.4 %1.9 %0.3 % 2.2 % 6.6 %
Uncertain domestic tax positions 5.5 %2.7 %2.0 %
Uncertain tax positions(22.0)% 10.7 % 49.5 %
TCJA net impact(4.7)% 91.4 %  %
Other, net (3.5)%0.4 %(0.2)%1.8 % (0.2)% (3.5)%
 (95.9)%(63.2)%(76.7)%(17.5)% 88.8 % (95.9)%
  
We had net deferred tax assets of $62 million as of December 31, 2016 and net deferred tax liabilities of $264 million as of December 31, 2015. Gross deferred tax liabilities of $1.760 billion as of December 31, 2016 and $1.875 billion as of December 31, 2015 relate primarily to goodwill and intangible assets acquired in connection with our prior acquisitions. Gross deferred tax assets of $1.822 billion as of December 31, 2016 and $1.611 billion as of December 31, 2015 relate primarily to the establishment of inventory and product-related reserves; litigation, product liability and other reserves and accruals; compensation related accruals; net operating loss carryforwards and tax credit carryforwards; and the federal benefit of uncertain tax positions.
(1)Due to the inclusion of new tax provisions in 2018 created by the TJCA, we have reclassified select items in prior years to align with the new categories established in 2018, domestic taxes on foreign earnings and uncertain tax positions.


Significant components of our deferred tax assets and liabilities are as follows:
 As of December 31,As of December 31,
(in millions)
 2016 20152018 2017
    
Deferred Tax Assets:
       
Inventory costs and related reserves $37
 $49
$18
 $29
Tax benefit of net operating loss and credits 798
 742
450
 478
Reserves and accruals 228
 232
258
 179
Restructuring-related charges 14
 17
12
 12
Litigation and product liability reserves 752
 689
221
 383
Investment write-down 17
 7
28
 32
Compensation related 142
 138
106
 104
Federal benefit of uncertain tax positions 238
 197
10
 163
Other 42
 39
37
 48
 2,268
 2,110
1,140
 1,428
Less valuation allowance (446) (499)
Less: valuation allowance(344) (465)
 1,822
 1,611
796
 963
Deferred Tax Liabilities:
       
Property, plant and equipment 42
 44
25
 33
Unrealized gains and losses on derivative financial instruments 67
 82
44
 5
Intangible assets 1,651
 1,749
968
 1,028
 1,760
 1,875
1,037
 1,066
    
Net Deferred Tax Assets / (Liabilities)
 62
 (264)(241) (103)
    
Prepaid on intercompany profit 75
 63
161
 66
Net Deferred Tax Assets / (Liabilities) and Prepaid on Intercompany Profit $137
 $(201)$(80) $(37)

Our deferred tax assets, deferred tax liabilities and prepaid on intercompany profit, are included in the following locations within our accompanying consolidated balance sheets (in millions):
Location inAs of December 31,Location on Consolidated Balance SheetsAs of December 31,
ComponentBalance Sheet201620152018 2017
Current deferred tax asset and prepaid on intercompany profitDeferred income taxes$75
$496
Prepaid on intercompany profitPrepaid income taxes$161
 $66
Non-current deferred tax assetOther long-term assets80
40
Other long-term assets87
 88
Deferred Tax Assets and Prepaid on Intercompany Profit 155
536
 249
 154
      
Current deferred tax liabilityOther current liabilities
2
Non-current deferred tax liabilityDeferred income taxes18
735
Deferred income taxes328
 191
Deferred Tax Liabilities 18
737
 328
 191
      
Net Deferred Tax Assets / (Liabilities) and Prepaid on Intercompany Profit $137
$(201)
Net Deferred Tax Assets (Liabilities) and Prepaid on Intercompany ProfitNet Deferred Tax Assets (Liabilities) and Prepaid on Intercompany Profit$(80) $(37)

As of December 31, 2016,2018, we had U.S. federal and state tax net operating loss carryforwards and tax credits, the tax effect of which was $724$416 million. As of December 31, 2015,2017, we had U.S. federal and state tax net operating loss carryforwards and tax credits, the tax effect of which was $500$338 million. In addition, we had foreign tax net operating loss carryforwards and tax credits, the tax effect of which was $172$42 million as of December 31, 2016,2018, as compared to $273$149 million as of December 31, 2015.2017. These tax attributes will expire periodically beginning in 2017. The tax effect of both U.S. federal and state tax net operating loss carryforwards and tax credits and foreign tax net operating loss carryforwards and tax credits as of December 31, 2015 was

previously disclosed in the amounts of $624 million and $288 million, respectively. We are updating these amounts to reflect unrecognized tax benefits that reduce the amounts.

The current accounting standard for stock-based compensation prohibits the recognition of windfall tax benefits from stock-based compensation deducted for tax return purposes until realized through a reduction of income taxes payable. We have $76 million and $32 million of U.S. tax net operating loss and credits as of December 31, 2016 and December 31, 2015, respectively. These amounts were not included in the gross deferred tax balances as of December 31, 2016 and December 31, 2015.2019.

After consideration of all positive and negative evidence, we believe that it is more likely than not that a portion of theour deferred tax assets will not be realized. As a result, we established a valuation allowance of $446$344 million as of December 31, 20162018 and $499$465 million as of December 31, 2015,2017, representing a decrease of $53$121 million. The decrease in the valuation allowance as of December 31, 2016,2018, as compared to December 31, 2015,2017, is primarily attributable to the release of valuation allowance related to certain foreignallowances against expiring net operation losses and utilization of deferred tax net operating losses which expired in 2016. The release was offset by an increase to the valuation allowance related to federal and state tax credits and state tax net operating loss carryforwards.assets. The income tax impact of the unrealized gain or loss component of other comprehensive income and stockholders' equity was a charge of $9$37 million in 2016,2018, a chargebenefit of $25$63 million in 2015,2017 and a charge of $21$9 million in 2014.2016.

We have not provided U.S. income taxes and foreign withholding taxes on the undistributed earnings of foreign subsidiaries as of December 31, 2016 because we intend to permanently reinvest such earnings outside the U.S. As of December 31, 2016, the cumulative amount of excess financial reporting basis over the tax basis of investments in foreign subsidiaries that is indefinitely reinvested is approximately $9.8 billion. Generally, such amounts become subject to U.S. taxation upon the remittance of dividends and under certain other circumstances. It is not practicable to estimate the amount of deferred tax liability related to investments in these foreign subsidiaries.
We obtain tax incentives through Free Trade Zone Regime offered in Costa Rica which allows 100%100.0 percent exemption from income tax in the first eight years of operations and 50%50.0 percent exemption in the following four years. This tax incentive resulted in income tax savings of $146 million for 2018, $127 million for 2017 and $123 million for 2016, $7 million for 2015, and $7 million for 2014.2016. The tax incentive for 100%100.0 percent exemption from income tax is expected to expire in 2023. The impact ofon per share earnings iswas $0.10 for 2018 and $0.09 for 2016both 2017 and 2016. Additionally, we benefit from tax incentives in Puerto Rico. The income tax savings from Puerto Rico were immaterial for 20152018, 2017 and 2014.2016.

As of December 31, 2016,2018, we had $1.095$427 million of gross unrecognized tax benefits, of which a net $332 million, if recognized, would affect our effective tax rate. As of December 31, 2017, we had $1.238 billion of gross unrecognized tax benefits, of which a net $1.0061.150 billion, if recognized, would affect our effective tax rate. As of December 31, 2015, we had $1.056 billion of gross unrecognized tax benefits, of which a net $900 million, if recognized, would affect our effective tax rate. As of December 31, 2014,2016, we had $1.0471.095 billion of gross unrecognized tax benefits, of which a net $903 million1.006 billion, if recognized, would affect our effective tax rate. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):follows:

 Year Ended December 31,Year Ended December 31,
 2016 2015 2014
      
(in millions)2018 2017 2016
Beginning Balance $1,056
 $1,047
 $1,102
$1,238
 $1,095
 $1,056
Additions based on positions related to the current year 47
 32
 44
79
 134
 47
Additions based on positions related to prior years 14
 38
 3
4
 16
 14
Reductions for tax positions of prior years (17) (36) (87)(433) (3) (17)
Settlements with taxing authorities (3) (18) (5)(459) (2) (3)
Statute of limitation expirations (2) (7) (10)(3) (2) (2)
Ending Balance $1,095
 $1,056
 $1,047
$427
 $1,238
 $1,095
We are subject to U.S. Federal income tax as well as income tax of multiple state and foreign jurisdictions. We have concluded all U.S. federal income tax matters through 2000, all foreign income tax matters through 20022013, with the exception of select issues in 2011 and substantially all material state and local income tax matters through 2005.2010. We have concluded all foreign income tax matters through 2013, with the exception of issues for Italy, which have concluded through 2002.

We haveDuring 2010 and 2011, we received Notices of Deficiency from the Internal Revenue Service (IRS) reflecting proposed audit adjustments for Guidant Corporation (Guidant) for its 2001 through 2006 tax years and Boston Scientific Corporation for itsour 2006 and 2007 tax years. The total incremental tax liability asserted by the IRS for the applicable periods iswas $1.162 billion plus interest. The primary issue in dispute for all years iswas the transfer pricing associated with the technology license agreements between domestic and foreign subsidiaries of Guidant. In addition, the IRS has proposed adjustments in connection with the financial terms of our Transaction Agreement with Abbott Laboratories pertaining to the sale of Guidant's vascular intervention business to Abbott Laboratories in April 2006. During 2014,

we received a Revenue Agent Report (RAR) from the IRS reflecting significant proposed audit adjustments to our 2008, 2009 and 2010 tax years based upon the same transfer pricing methodologies that the IRS applied to our 2001 through 2007 tax years.

We do not agree with the transfer pricing methodologies applied by the IRS or its resulting assessment. We have filed petitions with thecontested in U.S. Tax Court (Tax Court) contesting the Notices of Deficiencyproposed adjustments from the IRS for theGuidant for its 2001 through 2006 tax years and our 2006 and 2007 tax years in challenge and submitted a letterrelated to the IRS Officeits audit of Appeals (IRS Appeals) protesting the Revenue Agent Report for the 2008 through 2010 tax years and requesting an administrative appeal hearing. The issues in dispute were scheduled to be heard in Tax Court in late July 2016. On July 19,our transfer pricing methodologies. During 2016, we entered into a Stipulation of Settled Issues with the IRS intended to resolve all of the aforementioned transfer pricing issues, as well as the issues related to our 2006 transaction with Abbott. The Stipulation of Settled Issues isAbbott Laboratories. This stipulation was contingent upon the IRS Office of Appeals applying the same basis of settlement to all transfer pricing issues for the Company’s 2008 2009, andthrough 2010 tax years, and if applicable, reviewyears.

In the second quarter of 2018, a decision was entered by the U.S. Congress Joint Committee on Taxation. In October 2016, we reached an agreement in principle with IRS Appeals asTax Court resolving all disputes related to the resolution of the transfer pricing issues infor Guidant for its 2001 through 2006 tax years and our 2006 and 2007 tax years as well as the tax issues related to our 2006 transaction with Abbott Laboratories. Additionally, we resolved all issues with the IRS Office of Appeals for our 2008 2009, andthrough 2010 tax years, subjectincluding the transfer pricing issue and other unrelated issues. The final settlement calculation included certain elections made in these relevant years and resulted in a final net tax payment of $303 million plus $307 million of estimated interest, which was remitted in the second quarter of 2018. Due to additional calculationsthe final settlement of these disputes, we recorded a net tax as well as documentation to memorialize our agreement.benefit of $250 million in 2018.

In the event thatfourth quarter of 2018, we received a RAR from the conditionsIRS for our 2011 through 2013 tax years. The RAR reflected transfer pricing adjustments consistent with the basis of settlement for all transfer pricing issues agreed to in the Stipulation of Settled Items are satisfied, we expect to make net tax paymentsIssues. We remitted $93 million to the IRS in the fourth quarter of approximately $275 million, plus2018 reflecting the net balance of tax and interest throughdue for these years after consideration of amounts owed to us by the date of payment. If finalized, payments relatedIRS. Due to the resolution are expected in the next nine to 18 months. We believe that our income tax reserves associated with these matters are adequate as of December 31, 2016 and we do not expect to recognize any additional charges related to resolution of this controversy. However, the final resolution of these issues is contingent and if the Stipulationtax years, we recorded a net tax benefit of Settled Issues is not finalized, it could have a material impact on our financial condition, results of operations, or cash flows.$90 million.

We recognize interest and penalties related to income taxes as a component of income tax expense. We had $572$11 million accrued for gross interest and penalties as of December 31, 20162018 and $500$655 million as of December 31, 2015.2017. The increasedecrease in gross interest and penalties of $72$643 million was recognized in our consolidated statements of operations.operations and is primarily related to reaching settlements with the taxing authorities. We recognized net tax benefit related to interest and penalties of $498 million in 2018, as compared to a net tax expense of $154 million in 2017 and $46 million in 2016. The decrease in our net tax expense related to interest and penalties as of $46 million in 2016, $37 million in 2015 and $26 million in 2014.December 31, 2018, as compared to December 31, 2017, is related to reaching settlements with the taxing authorities.

It is reasonably possible that within the next 12 months we will resolve multiple issues including transfer pricing and transactional- related issues with foreign federal and state taxing authorities, in which case we could record a reduction in our balance of unrecognized tax benefits of up to approximately $758$11 million.

There are a number of key provisions under the TCJA, which was enacted on December 22, 2017, that impact us. The final impact of the TCJA, as described below, differs from the estimates reported at December 31, 2017 due to, among other things, additional guidance issued by the U.S. Department of the Treasury, changes in interpretations and assumptions made by us, and actions that we may take as a result. The key changes from the TCJA that are reported as of December 31, 2018 are the impact due to the reduced U.S. Federal corporate tax rate from 35.0 percent to 21.0 percent and a one-time transition tax on certain foreign earnings on which U.S. income tax is deferred. As a result of finalizing the impact of the TCJA, we recognized a tax benefit of $67 million in 2018. We recognized a total TCJA related tax expense of $793 million as of December 31, 2018 as compared to the provisional estimate of $861 million recognized as of December 31, 2017.

We are required to record deferred tax assets and liabilities based on the enacted tax rates at which they are expected to reverse in the future. Therefore, any U.S. related deferred taxes were re-measured from 35.0 percent down to 21.0 percent based on the recorded balances. The analysis included an assessment on the deductibility of certain amounts for which deferred tax assets may have been recorded. As of December 31, 2017, we recorded an estimate related to the re-measurement of our deferred tax balances, which was a benefit of approximately $99 million. In 2018, we finalized our calculations and did not adjust our estimate as recorded.

We are required to calculate a one-time transition tax based on our total post-1986 foreign subsidiaries' earnings and profits (E&P) that we previously deferred from U.S. income taxes. As a result of settling our various tax audits, the revised amount of transition tax is approximately $856 million as of December 31, 2018 as compared to the preliminary amount recorded of approximately $1.044 billion as of December 31, 2017. We anticipate offsetting this liability against existing tax attributes reducing the required payment to approximately $499 million, which will be remitted over an eight-year period. We remitted the first estimated installment payment in the second quarter of 2018, with the balance remaining of $429 million as of December 31, 2018. In addition, we have provided for tax expense of $18 million on U.S. state income taxes on all U.S. dollar-denominated E&P accumulated through December 31, 2017, which constitutes the preponderance of our foreign subsidiaries' accumulated E&P through December 31, 2017. We intend to indefinitely reinvest any remaining foreign earnings as of December 31, 2017 as well as current earnings in foreign operations for which income taxes have not already been provided at December 31, 2018. Determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings and additional outside basis difference in these entities is not practicable.

We are subject to a territorial tax system under the TCJA, in which we are required to provide for tax on Global Intangible Low Taxed Income (GILTI) earned by certain foreign subsidiaries. We have established an accounting policy election to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense.

NOTE KJ – COMMITMENTS AND CONTINGENCIES

The medical device market in which we primarily participate is largely technology driven. As a result, intellectual property rights, particularly patents and trade secrets, play a significant role in product development and differentiation. Over the years, there has been litigation initiated against us by others, including our competitors, claiming that our current or former product offerings infringe patents owned or licensed by them. Intellectual property litigation is inherently complex and unpredictable. In addition, competing parties frequently file multiple suits to leverage patent portfolios across product lines, technologies and geographies and to balance risk and exposure between the parties. In some cases, several competitors are parties in the same proceeding, or in a series of related proceedings, or litigate multiple features of a single class of devices. These forces frequently drive settlement not only for individual cases, but also for a series of pending and potentially related and unrelated cases. Although monetary and injunctive relief is typically sought, remedies and restitution are generally not determined until the conclusion of the trial court proceedings and can be modified on appeal. Accordingly, the outcomes of individual cases are difficult to time, predict or quantify and are often dependent upon the outcomes of other cases in other geographies.


During recent years, we successfully negotiated closure of several long-standing legal matters and have received favorable rulings in several other matters; however, there continues to be outstanding intellectual property litigation. Adverse outcomes in one or more of these matters could have a material adverse effect on our ability to sell certain products and on our operating margins, financial position, results of operations and/or liquidity.

In the normal course of business, product liability, securities and commercial claims are asserted against us. Similar claims may be asserted against us in the future related to events not known to management at the present time. We maintain an insurance policy providing limited coverage against securities claims and we are substantially self-insured with respect to product liability claims and fully self-insured with respect to intellectual property infringement claims. The absence of significant third-party insurance coverage increases our potential exposure to unanticipated claims or adverse decisions. Product liability claims, securities and commercial litigation and other legal proceedings in the future, regardless of their outcome, could have a material adverse effect on our financial position, results of operations and/or liquidity.

In addition, like other companies in the medical device industry, we are subject to extensive regulation by national, state and local government agencies in the United StatesU.S. and other countries in which we operate. From time to time we are the subject of qui

tam actions and governmental investigations often involving regulatory, marketing and other business practices. These qui tam actions and governmental investigations could result in the commencement of civil and criminal proceedings, substantial fines, penalties and administrative remedies and have a material adverse effect on our financial position, results of operations and/or liquidity.

In accordance with FASB ASC Topic 450, Contingencies, we accrue anticipated costs of settlement, damages, losses for product liability claims and, under certain conditions, costs of defense, based on historical experience or to the extent specific losses are probable and estimable. Otherwise, we expense these costs as incurred. If the estimate of a probable loss is a range and no amount within the range is more likely, we accrue the minimum amount of the range.

Our accrual for legal matters that are probable and estimable was $2.023$929 million as of December 31, 2018 and $1.612 billion as of December 31, 2016 and $1.936 billion as of December 31, 2015,2017 and includes certain estimated costs of settlement, damages and defense. The increasedecrease in our legal accrual was primarily due to litigation-related charges recorded during the year. During 2016, 2015settlement payments authorized in 2018 associated with product liability cases or claims related to transvaginal surgical mesh products. A portion of our legal accrual is funded and 2014, weincluded in our restricted cash and restricted cash equivalent balances in Other current assets of $655 million as of December 31, 2018 and $803 million as of December 31, 2017, as discussed in Note A – Significant Accounting Policies. We recorded litigation-related net charges in the amount of $103 million in 2018, $285 million in 2017 and $804 million $1.105 billion, and $1.036 billion, respectively.in 2016. We continue to assess certain litigation and claims to determine the amounts, if any, that management believes will be paid as a result of such claims and litigation and, therefore, additional losses may be accrued and paid in the future, which could materially adversely impact our operating results, cash flows and/or our ability to comply with our debt covenants.

In management's opinion, we are not currently involved in any legal proceedings other than those specifically identified below, which, individually or in the aggregate, could have a material adverse effect on our financial condition, operations and/or cash flows. Unless included in our legal accrual or otherwise indicated below, a range of loss associated with any individual material legal proceeding cannot be estimated.

Patent Litigation

On November 29, 2016 Nevro Corp. (Nevro) filed a patent infringement action against us and one of our subsidiaries, Boston Scientific Neuromodulation Corporation, in the U.S. District Court for the Northern District of California alleging that six U.S. patents (Alataris) owned by Nevro are infringed by our spinal cord stimulation systems. On June 29, 2017, Nevro amended the complaint to add an additional patent (Fang). We deny the plaintiff's allegations and intend to defend ourselves vigorously. On July 24, 2018, summary judgment was entered in favor of the Company and on July 31, 2018, we received final judgment and dismissal of the action. On July 31, 2018, Nevro filed an appeal.

On December 9, 2016, the Company and Boston Scientific Neuromodulation Corporation filed a patent infringement action against Nevro in U.S. District Court for the District of Delaware alleging that ten U.S. patents owned by Boston Scientific Neuromodulation Corporation are infringed by Nevro’s Senza™ Spinal Cord Stimulation System.

On March 10, 2017, Imran Niazi filed a patent infringement action against us in the U.S. District Court for the Western District of Wisconsin alleging that a U.S. patent owned by him is infringed by our Acuity™ Lead Delivery System. On June 30, 2017, we filed a motion to dismiss for improper venue and on November 7, 2017 the Wisconsin Court granted the motion to dismiss. On November 13, 2017 Niazi refiled the same action in the U.S. District of Minnesota.


On November 20, 2017, The Board of Regents, University of Texas System (UT) and TissueGen. Inc., served a lawsuit against us in the Western District of Texas. The complaint against us alleges patent infringement of two U.S. patents owned by UT, relating to “Drug Releasing Biodegradable Fiber Implant” and “Drug Releasing Biodegradable Fiber for Delivery of Therapeutics,” and affects the manufacture, use and sale of our Synergy™ Stent System. On March 12, 2018, the court dismissed the action and transferred it to the United States District Court for the District of Delaware. UT has appealed the decision.

On April 21, 2018, the Company and Boston Scientific Neuromodulation Corporation filed a patent infringement, theft of trade secrets and tortious interference with a contract action against Nevro in U.S. District Court for the District of Delaware, and amended the complaint on July 18, 2018, alleging that nine U.S. patents owned by Boston Scientific Neuromodulation Corporation are infringed by Nevro’s Senza™ I and Senza™ II Spinal Cord Stimulation Systems.

Product Liability Litigation

No individual lawsuits remain pending in state court jurisdictions against Guidant alleging personal injuries associated with defibrillators or pacemakers involved in certain 2005 and 2006 product communications. Further, we are aware of approximately six Guidant product liability lawsuits pending in international jurisdictions associated with defibrillators or pacemakers, including devices involved in the 2005 and 2006 product communications. Four of these suits are pending in Canada involving certain models of Guidant pacemakers, three of which are stayed pending the outcome of one lead class action. On May 8, 2009, the Justice of Ontario Court certified a class of persons in whom pacemakers were implanted in Canada and a class of family members with derivative claims. In each case, these matters generally seek monetary damages from us. This class action has been inactive since 2011. On March 24, 2014, the Ontario Superior Court approved a $3 million settlement of a class action involving certain models of Guidant defibrillators. We believe Guidant has satisfied its obligations pursuant to the settlement agreement.

As of February 5, 2019, approximately 53,000 product liability cases or claims related to transvaginal surgical mesh products designed to treat stress urinary incontinence and pelvic organ prolapse have been asserted against us. The pending cases are in various federal and state courts in the U.S. and include eight putative class actions. There were also fewer than 25 cases in Canada, inclusive of one certified and three putative class actions and fewer than 25 claims in the United Kingdom. Generally, the plaintiffs allege personal injury associated with use of our transvaginal surgical mesh products. The plaintiffs assert design and manufacturing claims, failure to warn, breach of warranty, fraud, violations of state consumer protection laws and loss of consortium claims. Over 3,100 of the cases have been specially assigned to one judge in state court in Massachusetts. On February 7, 2012, the Judicial Panel on Multi-District Litigation (MDL) established MDL-2326 in the U.S. District Court for the Southern District of West Virginia and transferred the federal court transvaginal surgical mesh cases to MDL-2326 for coordinated pretrial proceedings. During the fourth quarter of 2013, we received written discovery requests from certain state attorneys general offices regarding our transvaginal surgical mesh products. We have responded to those requests. As of February 5, 2019, we have entered into master settlement agreements in principle or are in the final stages of entering one with certain plaintiffs' counsel to resolve an aggregate of approximately 50,000 cases and claims. These master settlement agreements provide that the settlement and distribution of settlement funds to participating claimants are conditional upon, among other things, achieving minimum required claimant participation thresholds. Of the approximately 50,000 cases and claims, approximately 35,500 have met the conditions of the settlement and are final. All settlement agreements were entered into solely by way of compromise and without any admission or concession by us of any liability or wrongdoing.

On or about January 12, 2016, Teresa L. Stevens filed a claim against us and three other defendants asserting for herself and on behalf of a putative class of similarly situated women, that she was harmed by a vaginal mesh implant that she alleges contained a counterfeit or adulterated resin product that we imported from China. The complaint was filed in the U.S. District Court for the Southern District of West Virginia, before the same Court that is hearing the mesh MDL. The complaint, which alleges Racketeer Influenced and Corrupt Organizations Act (RICO) violations, fraud, misrepresentation, deceptive trade practices and unjust enrichment, seeks both equitable relief and damages under state and federal law. On January 26, 2016, the Court issued an order staying the case and directing the plaintiff to submit information to allow the FDA to issue a determination with respect to her allegations. In addition, we are in contact with the U.S. Attorney’s Office for the Southern District of West Virginia and are responding voluntarily to their requests in connection with that office’s review of the allegations concerning the use of mesh resin in the complaint. We deny the plaintiff’s allegations and intend to defend ourselves vigorously.

On February 27, 2017, Carolyn Turner filed a complaint against us and five other defendants asserting for herself and on behalf of a putative class of similarly situated women, that she was harmed by a vaginal mesh implant that she alleges contained a counterfeit or adulterated resin product that we imported from China. The complaint was filed in the U.S. District Court for the Middle District of Florida, Orlando Division and alleges violations of the RICO, negligence, strict liability, breach of an express or implied warranty, intentional and negligent misrepresentation, fraud and unjust enrichment. Ms. Turner served this complaint against us on April 7, 2017. As of April 27, 2017, this case has been stayed, pending resolution of the transfer petition to the mesh multidistrict litigation. We deny the plaintiff’s allegations and intend to defend ourselves vigorously.

We have established a product liability accrual for known and estimated future cases and claims asserted against us as well as with respect to the actions that have resulted in verdicts against us and the costs of defense thereof associated with our transvaginal surgical mesh products. While we believe that our accrual associated with this matter is adequate, changes to this accrual may be required in the future as additional information becomes available. While we continue to engage in discussions with plaintiffs’ counsel regarding potential resolution of pending cases and claims and intend to vigorously contest the cases and claims asserted against us, that do not settle, the final resolution of the cases and claims is uncertain and could have a material impact on our results of operations, financial condition and/or liquidity. Initial trials involving our transvaginal surgical mesh products have resulted in both favorable and unfavorable judgments for us. We do not believe that the judgment in any one trial is representative of potential outcomes of all cases or claims related to our transvaginal surgical mesh products.

Governmental Investigations and Qui Tam Matters

On August 3, 2012, we were served with a qui tam complaint that had previously been filed under seal against Boston Scientific Neuromodulation Corporation in the U.S. District Court for the District of New Jersey on March 2, 2011. On August 8, 2012, we learned that the federal government had previously declined to intervene in this matter. The relators’ complaint, now unsealed, alleges that Boston Scientific Neuromodulation Corporation violated the federal and various states' false claims acts through submission of fraudulent bills for implanted devices, under-reporting of certain adverse events and promotion of off-label uses. On September 10, 2012, the relators filed an amended complaint revising and restating certain of the claims in the original complaint. Our motion to dismiss, filed subsequently, was denied on May 31, 2013 and on June 28, 2013, we answered the amended complaint and brought certain counterclaims arising from relators’ unauthorized removal of documents from the business during their employments, which the relators moved to dismiss on July 22, 2013. The Court denied relators’ motion to dismiss the counterclaims on September 4, 2014. Following the completion of fact and expert discovery, we filed a motion for summary judgment against all claims on January 27, 2017, relators filed their own motion for summary judgment against our counterclaims that same date and the parties await the Court’s rulings on the motions. On December 15, 2017, the Court denied both motions for summary judgment. The case is set for trial beginning May 6, 2019.

On May 5, 2014, we were served with a subpoena from the U.S. Department of Health and Human Services, Office of the Inspector General. The subpoena seeks information relating to the launch of the Cognis™ and Teligen™ line of devices in 2008, the performance of those devices from 2007 to 2009 and the operation of the Physician Guided Learning Program. We are cooperating with this request. On May 6, 2016, a qui tam lawsuit in this matter was unsealed in the U.S. District Court for the District of Minnesota. At the same time, we learned that the U.S. government and the State of California had earlier declined to intervene in that lawsuit on April 15, 2016. The complaint was served on us on July 21, 2016. On October 7, 2016, the plaintiff/relator served an amended complaint that dropped the allegations relating to the Physician Guided Learning Program. We filed a motion to dismiss the amended complaint on December 7, 2016 and the court heard our motion to dismiss on April 5, 2017. On August 29, 2017, the Court granted the motion to dismiss, without prejudice and on September 19, 2017, the relator filed a Second Amended Complaint.We filed a motion to dismiss the Second Amended Complaint on October 10, 2017 and the Court denied that motion on December 13, 2017. On July 31, 2018, relator filed a motion seeking leave to file a Third Amended Complaint. The Court denied the motion on October 30, 2018.

On February 23, 2015, a judge for the Court of Modena (Italy) ordered a trial for Boston Scientific SpA and three of its employees, as well as numerous other defendants charged in criminal proceedings. The charges arise from allegations that the defendants made improper donations to certain health care providers and other employees of the Hospital of Modena in order to induce them to conduct unauthorized clinical trials, as well as related government fraud in relation to the financing of such clinical trials. A trial began on February 24, 2016 and is ongoing. On November 10, 2017, the Court issued a ruling that convicted one Boston Scientific employee but acquitted two others, and levied a fine of €245 thousand against us and imposed joint and several civil damages of €620 thousand on all defendants. We continue to deny these allegations, timely appealed the decision on May 10, 2018 and intend to continue to defend ourselves vigorously.

On December 1, 2015, the Brazilian governmental entity known as CADE (the Administrative Council of Economic Defense), served a search warrant on the offices of our Brazilian subsidiary, as well as on the Brazilian offices of several other major medical device makers who do business in Brazil, in furtherance of an investigation into alleged anti-competitive activity with respect to certain tender offers for government contracts. On June 20, 2017, CADE, through the publication of a “technical note,” announced that it was launching a formal administrative proceeding against Boston Scientific’s Brazilian subsidiary, Boston Scientific do Brasil Ltda., as well as against the Brazilian operations of Medtronic, Biotronik and St. Jude Medical, two Brazilian associations, ABIMED and AMBIMO and 29 individuals for alleged anti-competitive behavior. We deny the allegations and intend to defend ourselves vigorously.


On December 14, 2016, we learned that the Associacao Brasileira de Medicina de Grupo d/b/a ABRAMGE filed a complaint against us, Arthrex and Zimmer Biomet Holdings, in the U.S. District Court for the District of Delaware. This complaint, which ABRAMGE never served against us, alleges that the defendants or their agents paid kickbacks to health care providers in order to increase sales and prices and are liable under a variety of common law theories. On February 6, 2017, ABRAMGE filed and served an amended complaint on us and the other defendants. The amended complaint does not contain any material changes in the allegations against us. Subsequently, on March 2, 2017, ABRAMGE filed a motion to consolidate this lawsuit with two other similar suits that it had brought against Stryker and Abbott Laboratories, in a multidistrict litigation proceeding. On April 13, 2017, we filed a motion to dismiss the amended complaint, as well as a separate opposition to the multidistrict litigation motion and on May 31, 2017, the Joint Panel on Multi-District Litigation denied ABRAMGE’s motion for the multidistrict litigation. On September 1, 2017, ABRAMGE filed a motion for leave to file a Second Amended Complaint, while our motion to dismiss the Amended Complaint remained pending. On September 15, 2017, we filed an opposition to the motion seeking leave to amend. Both our motion to dismiss and the motion seeking leave to amend remain pending. On November 8, 2018, the Court granted ABRAMGE’s motion for leave to file a Second Amended Complaint, while also granting us leave to renew our motion to dismiss. We filed our motion to dismiss the Second Amended Complaint on January 18, 2019.

Other Proceedings

On May 16, 2018, Arthur Rosenthal et al., filed a plenary summons against Boston Scientific Corporation and Boston Scientific Limited with the High Court of Ireland alleging that payments are due pursuant a transaction agreement regarding Labcoat Limited.

On September 12, 2018, Channel Medsystems, Inc. (Channel) filed a complaint in Delaware Chancery Court against us for alleged breach of a $275 million purchase agreement. Channel alleges that we breached the agreement by terminating it. We have answered the complaint, denied the claims by Channel and have counterclaimed to recover part of our investment in Channel, alleging fraud in the inducement. The court has set a trial date of April 15, 2019.

Refer to Note I - Income Taxes for information regarding our tax litigation.

Proposed Acquisition

Refer to Note B – Acquisitions and Strategic Investments and Note E – Borrowings and Credit Arrangements for information regarding the proposed BTG Acquisition.

Matters Concluded Since December 31, 2017

On October 28, 2016, the Regents of the University of California filed a patent infringement action against us in the U.S. District Court for the Northern District of California alleging that two U.S. patents (Lesh) owned by the Regents of the University of California are infringed by certain of our catheters and other devices used to treat atrial fibrillation. The Company and the Regents settled the matter, and the case was dismissed on June 20, 2018.

On May 19, 2005, G. David Jang, M.D. filed suit against us alleging breach of contract relating to certain patent rights covering stent technology. The suit was filed in the U.S. District Court for the Central District of California seeking monetary damages and rescission of contract. After a Markman ruling relating to the Jang patent rights, Dr. Jang stipulated to the dismissal of certain claims alleged in the complaint with a right to appeal and the parties subsequently agreed to settle the other claims. In May 2007, Dr. Jang filed an appeal with respect to the remaining patent claims and in July 2008, the Court of Appeals vacated the District Court's consent judgment and remanded the case back to the District Court for further clarification. In August 2011, the District Court entered a stipulated judgment that we did not infringe the Jang patent. Dr. Jang filed an appeal on September 21, 2011 and on August 22, 2012, the Court of Appeals vacated the District Court's judgment and remanded the case to the District Court for further proceedings. On July 8, 2015, a jury found that our ExpressExpress™ Stent family did not literally infringe a Jang patent, but that the stents infringed under the doctrine of equivalents. The court reserved judgment until the conclusion of further proceedings related to the doctrine of equivalents finding. On September 29, 2015, the court ruled that our Express Stent family did not infringe under the doctrine of equivalents and, on October 30, 2015, the court entered judgment in our favor. On November 25, 2015, Dr. Jang filed a motion for judgment as a matter of law on literal infringement and/or for a new trial. On February 3, 2016, the court denied Dr. Jang’s motion for a new trial and judgment as a matter of law. Dr. Jang filed a notice of appeal. On September 29, 2017, the U.S. Court of Appeals for the Federal Circuit affirmed the judgment that our Express Stent did not infringe the Jang patents and we did not owe Dr. Jang any payments. On October 30, 2017, Jang filed a petition for rehearing and on December 21, 2017 the rehearing was denied. On March 21, 2018, Jang filed a petition for United States Supreme Court review and, on October 1, 2018, the Supreme Court denied his petition.


On September 27, 2010, Boston Scientific Scimed, Inc., Boston Scientific Ltd., Endovascular Technologies, Inc.January 15, 2019, we announced that we reached an agreement with Edwards Lifesciences Corporation (Edwards) to settle all outstanding patent disputes between us and we filed suit against Taewoong Medical, Co., Ltd., Standard Sci-Tech, Inc., EndoChoice, Inc.Edwards in all venues around the world. All pending cases or appeals in courts and Sewoon Medical Co., Ltd for infringementpatent offices between the two companies will be dismissed, and the parties will not litigate patent disputes related to current portfolios of three patents on stents for usetranscatheter aortic valves, certain mitral valve repair devices, and left atrial appendage closure devices. Any injunctions currently in place will be lifted. Under the GI system (the Pulnev and Hankh patents) and against Cook Medical Inc. (and related entities) for infringementterms of the same three patents and an additional patent (the Thompson patent).agreement, Edwards made a one-time payment to us of $180 million. No further royalties will be owed by either party under the agreement. All other terms remain confidential. The suit was filed in the U.S. District Court for the District of Massachusetts seeking monetary damages and injunctive relief. In December 2010, we amended our complaint to add infringement of six additional Pulnev patents. In January 2011, the defendants filed a counterclaim of invalidity and unenforceability. In September 2011, we amended the complaint to add Chek-Med Systems d/b/a GI Supplypreviously disclosed matters that have been resolved as a defendant. On December 22, 2016 the following defendants were dismissed: Taewoong Medical Co., Ltd., GI Supply, Inc., Standard Sci-Tech, Inc., Endochoice, Inc. and Sewoon Medical Co. Trial against the remaining parties is scheduled to begin September 11, 2017.result of this settlement include:

On October 30, 2015, a subsidiary of Boston Scientific filed suit against Edwards Lifesciences Corporation and Edwards Lifesciences Services GmbH in Düsseldorf District Court in Germany for patent infringement. We allege that Edwards’ SAPIEN™ 3 heart valveSAPIEN 3™ Heart Valve infringes our patent related to adaptive sealing technology. On February 25, 2016, we extended the action to allege infringement of a second patent related to adaptive sealing technology. The trial began on February 7, 2017. On March 9, 2017, the court found that Edwards infringed both patents and Edwards appealed.

On November 9, 2015, Edwards Lifesciences, LLC filed an invalidity claim against one of our subsidiaries, Sadra Medical, Inc. (Sadra), in the High Court of Justice, Chancery Division Patents Court in the United Kingdom, alleging that a European patent owned by Sadra relating to a repositionable heart valve is invalid. On January 15, 2016, we filed our defense and counterclaim for a declaration

that our European patent is valid and infringed by Edwards. On February 25, 2016, we amended our counterclaim to allege infringement of a second patent related to adaptive sealing technology. A trial was held from January 18 to January 27, 2017. On March 3, 2017, the court found one of our patents valid and infringed and some claims of the second patent invalid and the remaining claims not infringed. Both parties have filed an appeal. On March 28, 2018, the Court of Appeals affirmed the decision of the High Court.

On November 23, 2015, Edwards Lifesciences PVT, Inc. filed a patent infringement action against us and one of our subsidiaries, Boston Scientific Medizintechnik GmbH, in the District Court of Düsseldorf, Germany alleging a European patent (Spenser)(Spenser '672) owned by Edwards is infringed by our Lotus™ Transcatheter Heart Valve System. The trial began on February 7, 2017. On March 9, 2017, the court found that we did not infringe the Spenser '672 patent. Edwards filed an appeal.

On November 23, 2015, Edwards Lifesciences Corporation filed a patent infringement action against us and Boston Scientific Medizintechnik GmbH in the District Court of Düsseldorf, Germany alleging an European patent (Bourang) owned by Edwards is infringed by our Lotus Transcatheter Heart Valve System. The trial began on February 7, 2017. On March 28, 2017, the European Patent Office revoked the Bourang patent and on April 3, 2017, the court suspended the infringement action pending Edwards' appeal of the revocation of the patent at the European Patent Office.

On April 19, 2016, a subsidiary of Boston Scientific filed suit against Edwards Lifesciences Corporation (Edwards) in the United StatesU.S. District Court for the District of Delaware for patent infringement. We allege that Edwards’ SAPIEN™SAPIEN 3 valveValve infringes a patent related to adaptive sealing technology. On June 9, 2016, Edwards filed a counterclaim alleging that our Lotus Transcatheter Heart Valve System infringes three patents owned by Edwards. On October 12, 2016, Edwards filed a petition for inter partes review of our patent with the U.S. Patent and Trademark Office (USPTO), Patent Trial and Appeal Board. On March 29, 2017, the USPTO granted the inter partes review request. On April 18, 2017, Edwards filed a second petition for inter partes review of our patent with the USPTO. On March 23, 2018, the USPTO found our patent invalid. The trial has been set to beginCompany filed an appeal before the United States Court of Appeals for the Federal Circuit on July 30,May 24, 2018.

On April 19, 2016, a subsidiary of Boston Scientific filed suit against Edwards Lifesciences Corporation in the United StatesU.S. District Court for the Central District of California for patent infringement. We allege that Edwards’ aortic valve delivery systems infringe eight of our catheter related patents. On October 13, 2016, Edwards filed a petition for inter partes review of one asserted patent with the U.S. Patent & Trademark Office,USPTO, Patent Trial and Appeal Board. The trial has been set to begin on May 29, 2018.On April 21, 2017, the USPTO denied the petition. On April 19 and 20, 2017, Edwards filed multiple inter partes review petitions against the patents in suit. On September 8, 2017, the court granted a stay of the action pending an inter partes review of the patents in suit.

On April 26, 2016, Edwards Lifesciences PVT, Inc. filed a patent infringement action against us and one of our subsidiaries, Boston Scientific Medizintechnik GmbH, in the District Court of Düsseldorf, Germany alleging a European patent (Spenser)(Spenser '550) owned by Edwards is infringed by our Lotus Transcatheter Heart Valve System. The trial began on February 7, 2017. On March 9, 2017, the court found that we infringed the Spenser '550 patent. The Company filed an appeal. The appeal hearing is scheduled for May 17, 2018. On April 13, 2018, the ‘550 patent was revoked by the European Patent Office.


On October 27, 2016, Edwards Lifesciences PVT, Inc. filed a patent infringement action against us and one of our subsidiaries, Boston Scientific, LTD, in the Federal Court of Canada alleging that three Canadian patents (Spenser) owned by Edwards are infringed by our Lotus Transcatheter Heart Valve System.

On October 28, 2016, the Regents of the University of California filed a patent infringement action against us in the United States District Court for the Northern District of California alleging that two U.S. patents (Lesh) owned by the Regents of the University of California are infringed by certain of our catheters and other devices used to treat atrial fibrillation.

On November 29, 2016 Nevro Corp. filed a patent infringement action against us and one of our subsidiaries, Boston Scientific Neuromodulation Corporation, in the United States District Court for the Northern District of California alleging that six U.S. patents (Alataris) owned by Nevro Corp. are infringed by our spinal cord stimulation systems.

On December 9, 2016, the Company and Boston Scientific Neuromodulation Corporation, filed a patent infringement action against Nevro Corp. in United States District Court for the District of Delaware alleging that ten U.S. patents owned by Boston Scientific Neuromodulation Corporation are infringed by Nevro’s Senza™ Spinal Cord Stimulation System.

On December 22, 2016, Edwards Lifesciences PVT, Inc. and Edwards Lifesciences SA (AG) filed a plenary summons against Boston Scientific Limited and Boston Scientific Group Public Company in the High Court of Ireland alleging that a European patent (Spenser) owned by Edwards is infringed by our Lotus Transcatheter Heart Valve System.

Product Liability Litigation

No individual lawsuits remain pending in state court jurisdictions against Guidant alleging personal injuries associated with defibrillators or pacemakers involved in certain 2005 and 2006 product communications. Further, we are aware of approximately 8 Guidant product liability lawsuits pending in international jurisdictions associated with defibrillators or pacemakers, including devices involved in On April 13, 2018, the 2005 and 2006 product communications. Four of these suits are pending in Canada involving certain models of Guidant pacemakers, three of which are stayed pending‘550 patent was revoked by the outcome of one lead class action. On May 8, 2009, the Justice of Ontario Court certified a class of persons in whom pacemakers were implanted in Canada and a class of family members with derivative claims. In each case, these matters generally seek monetary damages from us. This class action has been inactive since 2011. On March 24, 2014, the Ontario Superior Court approved a $3 million settlement of a class action involving certain models of Guidant defibrillators. We believe Guidant has satisfied its obligations pursuant to the settlement agreement.


As of February 21, 2017, approximately 43,000 product liability cases or claims related to transvaginal surgical mesh products designed to treat stress urinary incontinence and pelvic organ prolapse have been asserted against us. The pending cases are in various federal and state courts in the United States and include eight putative class actions. There were also fewer than 20 cases in Canada, inclusive of one certified and three putative class actions, and fewer than 20 claims in the United Kingdom. Generally, the plaintiffs allege personal injury associated with use of our transvaginal surgical mesh products. The plaintiffs assert design and manufacturing claims, failure to warn, breach of warranty, fraud, violations of state consumer protection laws and loss of consortium claims. Over 3,100 of the cases have been specially assigned to one judge in state court in Massachusetts. On February 7, 2012, the Judicial Panel on Multi-District Litigation (MDL) established MDL-2326 in the U.S. District Court for the Southern District of West Virginia and transferred the federal court transvaginal surgical mesh cases to MDL-2326 for coordinated pretrial proceedings. During the fourth quarter of 2013, we received written discovery requests from certain state attorneys general offices regarding our transvaginal surgical mesh products. We have responded to those requests. As of February 21, 2017, we have entered into master settlement agreements in principle or are in the final stages of entering one with certain plaintiffs' counsel to resolve an aggregate of approximately 31,000 cases and claims. The master settlement agreements provide that the settlement and distribution of settlement funds to participating claimants are conditional upon, among other things, achieving minimum required claimant participation thresholds. Of the approximately 31,000 cases and claims approximately 12,000 have met the conditions of the settlement and are final. All settlement agreements were entered into solely by way of compromise and without any admission or concession by us of any liability or wrongdoing.European Patent Office.

On or about January 12, 2016, Teresa L. StevensAugust 1, 2018, the Company filed a claimpatent infringement action on the merits in Dusseldorf, Germany against usEdwards Lifesciences Corporation and three other defendants asserting for herself, and on behalf of a putative class of similarly-situated women, that she was harmed by a vaginal mesh implant that she alleges contained a counterfeit or adulterated resin product that we imported from China. The complaint was filed in the United States District Court for the Southern District of West Virginia, before the same Court that is hearing the mesh MDL. The complaint, which alleges Racketeer Influenced and Corrupt Organizations Act (RICO) violations, fraud, misrepresentation, deceptive trade practices and unjust enrichment, seeks both equitable relief and damages under state and federal law. On January 26, 2016, the Court issued an order staying the case and directing the plaintiff to submit information to allow the FDA to issue a determination with respect to her allegations. In addition, we are in contact with the U.S. Attorney’s Office for the Southern District of West Virginia, and are responding voluntarily to their requests in connection with that office’s review of the allegations concerning the use of mesh resin in the complaint. We deny the plaintiff’s allegations and intend to defend ourselves vigorously.

We have established a product liability accrual for known and estimated future cases and claims asserted against us as well as with respect to the actions that have resulted in verdicts against us and the costs of defense thereof associated with our transvaginal surgical mesh products. While we believe that our accrual associated with this matter is adequate, changes to this accrual may be required in the future as additional information becomes available. While we continue to engage in discussions with plaintiffs’ counsel regarding potential resolution of pending cases and claims and intend to vigorously contest the cases and claims asserted against us; that do not settle, the final resolution of the cases and claims is uncertain and could have a material impact on our results of operations, financial condition and/or liquidity. Initial trials involving our transvaginal surgical mesh products have resulted in both favorable and unfavorable judgments for us. We do not believeEdwards Lifesciences GmbH (collectively Edwards) alleging that the judgment in any one trial is representative of potential outcomes of all cases or claims related to our transvaginal surgical mesh products.

Governmental InvestigationsSapien 3™ device and Qui Tam MattersSapien 3 Ultra device infringed a patent owned by the Company.

On August 3, 2012, we were served with a qui tam complaint that had previously been filed under seal against Boston Scientific Neuromodulation Corp. in2018, the U.S. District Court for the District of New Jersey on March 2, 2011. On August 8, 2012, we learned that the federal government had previously declined to intervene in this matter. The relators’ complaint, now unsealed, alleges that Boston Scientific Neuromodulation Corp. violated the federal and various states' false claims acts through submission of fraudulent bills for implanted devices, under-reporting of certain adverse events, and promotion of off-label uses. On September 10, 2012, the relators filed an amended complaint revising and restating certain of the claims in the original complaint. Our motion to dismiss, filed subsequently, was denied on May 31, 2013, and on June 28, 2013, we answered the amended complaint and brought certain counterclaims arising from relators’ unauthorized removal of documents from the business during their employments, which the relators moved to dismiss on July 22, 2013. The Court denied relators’ motion to dismiss the counterclaims on September 4, 2014.
On May 5, 2014, we were served with a subpoena from the U.S. Department of Health and Human Services, Office of the Inspector General. The subpoena seeks information relating to the launch of the Cognis and Teligen line of devices in 2008, the performance of those devices from 2007 to 2009, and the operation of the Physician Guided Learning Program. We are cooperating with this request. On May 6, 2016, a qui tam lawsuit in this matter was unsealed in the U.S. District Court for the District of Minnesota. At the same time, we learned that the U.S. Government and the State of California had earlier declined to intervene in that lawsuit on April 15, 2016. The complaint was served on us on July 21, 2016. On October 7, 2016, the plaintiff/relator served an Amended Complaint that dropped the allegations relating to the Physician Guided Learning Program.


On February 23, 2015, a judge for the Court of Modena (Italy) ordered a trial for Boston Scientific SpA and three of its employees, as well as numerous other defendants charged in criminal proceedings.  The charges arise from allegations that the defendants made improper donations to certain health care providers and other employees of the Hospital of Modena in order to induce them to conduct unauthorized clinical trials, as well as related government fraud in relation to the financing of such clinical trials. A trial began on February 24, 2016 and is ongoing. We deny these allegations and intend to defend ourselves vigorously.

On December 1, 2015, the Brazilian governmental entity known as CADE (the Administrative Council of Economic Defense), served a search warrant on the offices of our Brazilian subsidiary, as well as on the Brazilian offices of several other major medical device makers who do business in Brazil, in furtherance of an investigation into alleged anti-competitive activity with respect to certain tender offers for government contracts.  We are cooperating fully with CADE’s inquiry.

On December 14, 2016, we learned that the Associacao Brasileira de Medicina de Grupo d/b/a ABRAMGECompany filed a Complaintpreliminary injunction request in Dusseldorf, Germany against the Company, ArthrexEdwards Lifesciences Corporation and Zimmer Biomet Holdings, in the U.S. District Court for the District of Delaware. This Complaint, which ABRAMGE never served against the Company, alleges that the defendants or their agents paid kickbacks to health care providers in order to increase sales and prices, and are liable under a variety of common law theories. On February 6, 2017, ABRAMGE filed and served an Amended Complaint on the Company and the other defendants. The Amended Complaint does not contain any material changes in the allegations against the Company. We deny these allegations and intend to defend ourselves vigorously if ABRAMGE serves the Complaint.

Other Proceedings

In June of 2016, Guidant asserted three arbitrations claims, which are pending, related to three insurance policies for indemnity arising out of previously incurred and satisfied liabilities tied to allegedly defective cardiac rhythm management devices, which Guidant had manufactured. Guidant has claimed indemnities against such liabilities under insurance policies which it purchased for the 2004 policy year.  The three insurance policies were issued respectively by Markel (Bermuda), Zurich (now Swiss Re International SE, UK Branch) and Swiss Re.

On November 2, 2015, Acacia Research Corporation (ARC) filed an arbitration demand with the American Arbitration AssociationEdwards Lifesciences GmbH (collectively Edwards) alleging that the Company breached an agreement relating to the sale of patents from the Company to ARC. The hearing began on February 20, 2017.

Refer to Note J - Income Taxes for information regarding our tax litigation.

Matters Concluded Since December 31, 2015

On September 22, 2014, The Board of Trustees for the University of Alabama filed a complaint in the United States District Court for the Northern District of Alabama alleging that the sale of our cardiac resynchronization therapy devices infringeSapien 3 Ultra infringed a patent owned by the University of Alabama.Company. On August 21, 2015,October 23, 2018, the court ordered a stay pending our requests for inter partes review of all claims relatedfound that the Sapien 3 Ultra infringed the patent. Edwards had the right to the patent before the Patent Trial and Appeal Board of the U.S. Patent and Trademark Office (USPTO). Our requests were rejected on September 24, 2015 and October 19, 2015. On March 7, 2016, the USPTO granted our reconsideration motion and initiated an inter partes review and, on March 29, 2016, the District Court stayed the case pending a decision in the inter partes review. On October 6, 2016 the parties reached a settlement agreement. On October 19, 2016, the case was dismissed with prejudice.appeal.

On March 12, 2010, we received a Civil Investigative Demand (CID) from the Civil Division of the U.S. Department of Justice (DOJ) requesting documents and information relating to reimbursement advice offered by us relating to certain CRM devices. On February 9, 2016, the DOJ informed us that we are no longer required to retain documents and information relating to the CID.

On July 11, 2014, we were served with a subpoena from the U.S. Attorney for the District of New Jersey. The subpoena seeks information relating to BridgePoint Medical, Inc., which we acquired in October 2012, including information relating to its sale of CrossBoss™ and Stingray™ products, educational and training activities that relate to those sales and our acquisition of BridgePoint Medical. On August 20, 2015, the court unsealed a qui tam lawsuit brought by a former employee named Robin Levy against the company as well as a decision by the U.S. Attorney for New Jersey declining to intervene in the lawsuit. The lawsuit alleges that the company violated the federal and various state false claims acts through seeking to upcode Chronic Total Occlusion (“CTO”) procedures and requiring in-patient treatment and purchases of coronary stents in order for physicians to receive training on the CTO procedure. On January 26, 2016, the Court dismissed the qui tam lawsuit.

On March 18, 2015, Denise Fretter and Maria Korsgaard, claiming to represent a class of current and former female field sales employees at Boston Scientific Neuromodulation Corporation (BSNC), filed a lawsuit against BSNC in the U.S. District Court

for the Central District of California. The plaintiffs allege gender discrimination in pay, promotions and differential treatment against them and the putative class. On February 6, 2016, the parties entered into a confidential settlement agreement, and the case has been dismissed.

On April 24, 2014, Dr. Qingsheng Zhu and Dr. Julio Spinelli, acting jointly on behalf of the stockholder representative committee of Action Medical, Inc. (Action Medical), filed a lawsuit against us and our subsidiary, Cardiac Pacemakers, Inc. (CPI), in the U.S. District Court for the District of Delaware. The stockholder representatives alleged that we and CPI breached a contractual duty to pursue development and commercialization of certain patented heart pacing methods and devices and to return certain patents. On March 15, 2016, the Court granted summary judgment in our favor as to all of plaintiffs’ claims for damages. The parties subsequently reached a resolution on the remaining claim and counterclaim concerning specific performance, and the case was dismissed on June 29, 2016.

On February 18, 2014, Atlas IP,22, 2018, Edwards Lifesciences LLC filed a complaintpatent infringement action against Boston Scientific Corporation, in the United StatesU. S. District Court for the Southern District of FloridaDelaware, alleging that the sale oftwo U.S. patents (Schweich) owned by them are infringed by our LATITUDE™ Patient ManagementWatchman™ Left Atrial Appendage Closure Device, Watchman Delivery System and implantable devices that communicate with the LATITUDE™ Device infringe a patent owned by Atlas. On July 9, 2014, the District Court granted our motion to transfer venue to the United States District Court for the District of Minnesota. On January 12, 2015, Atlas dismissed its complaint. On September 22, 2015, Atlas IP LLC filed a complaint in Federal Court in Ottawa, Ontario, Canada alleging that the sale of our LATITUDE™ Patient Management System and implantable devices that communicate with the LATITUDE™ Device infringe certain claims of a Canadian patent owned by Atlas. OnOctober 25, 2016, the claim against us in Canada was dismissed.

On September 28, 2011, we served a complaint against Mirowski Family Ventures LLC in the U.S. District Court for the Southern District of Indiana for a declaratory judgment that we have paid all royalties owed and did not breach any contractual or fiduciary obligations arising out of a license agreement. Mirowski answered and filed counterclaims requesting damages. On May 13, 2013, Mirowski Family Ventures served us with a complaint alleging breach of contract in Montgomery County Circuit Court, Maryland, and they amended this complaint on August 1, 2013. On July 29, 2013, the Indiana case was dismissed. On September 10, 2013, we removed the case to the United States District Court for the District of Maryland. On June 5, 2014, the District Court granted Mirowski’s motion to remand the case to the Montgomery County Circuit Court. On September 24, 2014, following a jury verdict against us, the Montgomery County Circuit Court entered a judgment that we breached our license agreement with Mirowski and awarded damages of $308 million. On October 28, 2014, the Montgomery County Circuit Court denied our post-trial motions seeking to overturn the judgment. On November 19, 2014, we filed an appeal with the Maryland Court of Special Appeals. On January 29, 2016, the Maryland Court of Special Appeals affirmed the decision of the Montgomery County Circuit Court. On February 2, 2016, we filed a motion for reconsideration, which was denied. On July 12, 2016, the Maryland Court of Appeals denied our petition for certiorari. On July 26, 2016, we paid $366 million in satisfaction of the judgment and interest, subject to a right of rescission should the judgment be reversed. On October 7, 2016 we filed a Petition for Writ of Certiorari with the United States Supreme Court. On February 21, 2017, the Court denied our petition.

Watchman Access System.

NOTE LK – STOCKHOLDERS' EQUITY

Preferred Stock

We are authorized to issue 50 million shares of preferred stock in one or more series and to fix the powers, designations, preferences and relative participating, option or other rights thereof, including dividend rights, conversion rights, voting rights, redemption terms, liquidation preferences and the number of shares constituting any series, without any further vote or action by our stockholders. As of December 31, 20162018 and 2015,2017, we had no shares of preferred stock issued or outstanding.

Common Stock

We are authorized to issue 2.02.000 billion shares of common stock, $0.01$0.01 par value per share. Holders of common stock are entitled to one vote per share. Holders of common stock are entitled to receive dividends, if and when declared by theour Board of Directors and to share ratably in our assets legally available for distribution to our stockholders in the event of liquidation. Holders of common stock have no preemptive, subscription, redemption, or conversion rights. The holders of common stock do not have cumulative voting rights. The holders of a majority of the shares of common stock can elect all of the directors and can control our management and affairs.

On January 25, 2013, our Board of Directors approved a stock repurchase program authorizing the repurchase of up to $1.0$1.000 billion of our common stock. We did not repurchase any shares of our common stock during 2016 or 2015. During 2014, we repurchased approximately 10 million shares of our common stock for $125 million. Repurchased shares are available for reissuance under our equity incentive plans and for general corporate purposes, including acquisitions. We did not repurchase any shares of our common stock during 2018, 2017 or 2016. As of December 31, 2016,2018, we had remaining $535 million authorized under our 2013 share repurchase program. There were approximately 248 million shares in treasury as of December 31, 20162018 and December 31, 2015.2017.

NOTE L – STOCK INCENTIVE AND OWNERSHIP PLANS


NOTE M – STOCK OWNERSHIP PLANS
Employee and Director Stock Incentive Plans

In March and May 2011, our Board of Directors and stockholders respectively, approved our 2011 Long-Term Incentive Plan (the 2011 LTIP), authorizing for issuance up to 146 million shares of our common stock. The 2011 LTIP covers officers, directors, employees and consultants and provides for the grant of restricted or unrestricted common stock, deferred stock units (DSU), options to acquire our common stock, stock appreciation rights, performance awards (market-based and performance-based DSUs) and other stock and non-stock awards. Shares reserved under our current and former stock incentive plans totaled approximately 150132 million as of December 31, 2016.2018. The Executive Compensation and Human Resources Committee (the Committee) of the Board of Directors, consisting of independent, non-employee directors may authorize the issuance of common stock and authorize cash awards under the 2011 LTIP in recognition of the achievement of long-term performance objectives established by the Committee.
Nonqualified

Non-qualified options issued to employees are generally granted with an exercise price equal to the market price of our stock on the grant date, vest over a four-year service period and have a ten-year contractual life. In the case of qualified options, if the recipient owns more than ten percent of the voting power of all classes of stock, the option granted will be at an exercise price of 110 percent of the fair market value of our common stock on the date of grant and will expire over a period not to exceed five years. Non-vested stock awards, including restricted stock awards and deferred stock units,DSUs, issued to employees are generally granted with an exercise price of zero and typically vest in five equal annual installments. These awards represent our commitment to issue shares to recipients after the vesting period. Upon each vesting date, such awards are no longer subject to risk of forfeiture and we issue shares of our common stock to the recipient.

The following presents the impact of stock-based compensation on our consolidated statements of operations for the years ended December 31, 2016, 2015 and 2014:operations:
 Year Ended December 31,Year Ended December 31,
(in millions, except per share data) 2016 2015 20142018 2017 2016
Cost of products sold $6
 $7
 $6
$7
 $7
 $6
Selling, general and administrative expenses 90
 81
 79
109
 98
 90
Research and development expenses 20
 19
 18
24
 23
 20
 116
 107
 103
140
 127
 116
Income tax benefit (29) (28) (28)
 $87
 $79
 $75
Income tax (benefit) expense(21) (32) (29)
      $119
 $96
 $87
Net impact per common share - basic $0.06
 $0.06
 $0.06
$0.09
 $0.07
 $0.06
Net impact per common share - assuming dilution $0.06
 $0.06
 $0.06
$0.08
 $0.07
 $0.06

Stock Options

We use the Black-Scholes option-pricing model to calculate the grant-date fair value of stock options granted to employees under our stock incentive plans. We calculated the fair value for options granted during 2016, 2015 and 2014 using the following estimated weighted-average assumptions:
 Year Ended December 31,Year Ended December 31,
 2016 2015 20142018 2017 2016
Options granted (in thousands) 4,186
 4,441
 4,943
3,491
 4,439
 4,186
Weighted-average exercise price $17.46
 $16.49
 $13.02
$27.26
 $24.70
 $17.46
Weighted-average grant-date fair value $5.60
 $5.54
 $5.07
$8.55
 $7.16
 $5.60
Black-Scholes Assumptions           
Expected volatility 30% 31% 37%26% 25% 30%
Expected term (in years, weighted) 6.0
 6.0
 6.0
6.0
 6.1
 6.0
Risk-free interest rate 1.14% - 2.08%
 1.49% - 1.92%
 1.69% - 2.09%
2.61% - 3.01%
 2.03% - 2.21%
 1.14% - 2.08%

Expected Volatility

We use our historical volatility and implied volatility as a basis to estimate expected volatility in our valuation of stock options.

Expected Term

We estimate the expected term of options using historical exercise and forfeiture data. We believe that this historical data provides the best estimate of the expected term of new option grants.

Risk-Free Interest Rate

We use yield rates on U.S. Treasury securities for a period approximating the expected term of the award to estimate the risk-free interest rate in our grant-date fair value assessment.


Expected Dividend Yield

We have not historically paid cash dividends to our stockholders and currently do not intend to pay cash dividends. Therefore, we have assumed an expected dividend yield of zero in our grant-date fair value assessment.

Information related to stock options for 2016, 2015 and 2014 under stock incentive plans isare as follows:
 
Stock Options
(in thousands)
 
Weighted
Average
Exercise Price
 
Weighted Average
Remaining
Contractual Life 
(in years)
 
Aggregate
Intrinsic
Value
(in millions)
Stock Options
(in thousands)
 
Weighted
Average
Exercise Price
 
Weighted Average
Remaining
Contractual Life 
(in years)
 
Aggregate
Intrinsic
Value
(in millions)
Outstanding as of December 31, 2013 44,892
 $12
    
Granted 4,943
 13
    
Exercised (4,418) 8
    
Cancelled/forfeited (5,909) 17
    
Outstanding as of December 31, 2014 39,508
 $11
    
Granted 4,441
 16
    
Exercised (9,040) 9
    
Cancelled/forfeited (3,820) 25
    
Outstanding as of December 31, 2015 31,089
 $11
  31,089
 $11
    
Granted 4,186
 17
  4,186
 17
    
Exercised (6,612) 12
  (6,612) 12
    
Cancelled/forfeited (2,019) 21
  (2,019) 21
    
Outstanding as of December 31, 2016 26,644
 $11
 5.8 $281
26,644
 $11
    
Exercisable as of December 31, 2016 17,293
 $9
 4.4 $226
Expected to vest as of December 31, 2016 8,664
 16
 8.3 51
Total vested and expected to vest as of December 31, 2016 25,957
 $11
 5.7 $277
Granted4,439
 25
    
Exercised(3,922) 10
    
Cancelled/forfeited(445) 17
    
Outstanding as of December 31, 201726,716
 $13
  
Granted3,491
 27
  
Exercised(4,385) 11
  
Cancelled/forfeited(519) 22
  
Outstanding as of December 31, 201825,304
 $16
 5.5 $499
Exercisable as of December 31, 201816,535
 $11
 4.1 $396
Expected to vest as of December 31, 20188,319
 23
 8.2 99
Total vested and expected to vest as of December 31, 201824,854
 $15
 5.4 $495
The total intrinsic value of stock options exercised was $90 million in 2018 and $64 million in 2016, $69 million in 2015both 2017 and $24 million in 2014.2016.

Non-Vested Stock

We value restricted stock awards and DSUs based on the closing trading value of our shares on the date of grant. Information related to non-vested stock awards during 2016, 2015 and 2014 is as follows:
 
Non-Vested
Stock Award Units
(in thousands)
 
Weighted Average
Grant- Date
Fair Value
Non-Vested
Stock Award Units
(in thousands)
 
Weighted Average
Grant-Date
Fair Value
Balance as of December 31, 2013 37,339
 $7
Granted 7,072
 13
Vested (1) (11,205) 7
Forfeited (2,671) 8
Balance as of December 31, 2014 30,535
 $9
Granted 6,606
 16
Vested (1) (11,607) 8
Forfeited (1,770) 10
Balance as of December 31, 2015 23,764
 $11
23,764
 $11
Granted 6,132
 17
6,132
 17
Vested (1) (10,045) 10
(10,045) 10
Forfeited (1,054) 13
(1,054) 13
Balance as of December 31, 2016 18,797
 $14
18,797
 $14
Granted4,798
 24
Vested (1)(7,663) 11
Forfeited(683) 17
Balance as of December 31, 201715,250
 $18
Granted4,375
 28
Vested (1)(6,194) 16
Forfeited(748) 22
Balance as of December 31, 201812,683
 $22
(1)The number of restricted stock units vested includes shares withheld on behalf of employees to satisfy statutory tax withholding requirements.

The total vesting date fair value of stock award units that vested was approximately $179$170 million in 2016, $1862018, $190 million in 20152017 and $146$179 million in 2014.2016.

Market-based DSU Awards

During 2016, 20152018, 2017 and 2014,2016, we granted market-based DSU awards to certain members of our senior management team. The number of shares ultimately issued to the recipient is based on the total shareholder return (TSR) of our common stock as compared to the TSR of the common stock of the other companies in the S&P 500 Health Care Index over a three-year performance period. The number of DSUs ultimately granted under this program range from 0 percent to 200 percent of the target number of performance-based DSUs awarded to the participant as determined by achievement of the performance criteria of the program. In addition, award recipients must remain employed by us throughout the three-year performance period to attain the full amount of the market-based DSUs that satisfied the market performance criteria.

We determined the fair value of the market-based DSU awards to be approximately $6 million for 2016, $7 million for 20152018, $8 million for 2017 and $6 million for 2014.2016. We determined these fair values based on Monte Carlo simulations as of the date of grant, utilizing the following assumptions:
 2016 2015 20142018 2017 2016
 Awards Awards AwardsAwards Awards Awards
Stock price on date of grant $17.26
 $16.31
 $13.08
$27.09
 $24.55
 $17.26
Measurement period (in years) 2.9
 3.0
 3.0
2.9
 2.8
 2.9
Risk-free rate 0.90% 0.98% 0.66%2.36% 1.45% 0.90%
We recognize the expense on these awards in our consolidated statements of operations on a straight-line basis over the three-year measurement period.

Free Cash Flow Performance-based DSU Awards

During 2016, 20152018, 2017 and 2014,2016, we granted free cash flow performance-based DSU awards to certain members of our senior management team. The attainment of these performance-based DSUs is based on our adjusted free cash flow (FCF)(AFCF) measured against our internal annual financial plan performance for FCF. FCFAFCF. AFCF is measured over a one-year performance period beginning January 1stof each year and ending December 31st. The number of performance-based DSUs as to which the performance criteriaultimately granted under this program shall be determinedrange from 0 percent to have been satisfied will be in a range of 0% to 150%150 percent of the target number of performance-based DSUs awarded to the participant.participant as determined by achievement of the performance criteria of the program. In addition, award recipients must remain employed by us throughout a three-year service

period (inclusive of the one-year performance period) to attain the full amount of the performance-based DSUs that satisfied the performance criteria.
We determined
The following table presents our assumptions used in determining the fair value of the 2016 FCFour AFCF awards currently expected to be approximately $8 million, based on the closing stock price atvest as of December 31, 2016 and an achievement of approximately 114% of the target payout. The per unit fair value is $21.63, which is the closing stock price on December 31, 2016. We determined the fair value of the 2015 FCF awards to be approximately $6 million and the per unit fair value was $18.44, and we determined the fair value of the 2014 FCF awards to be approximately $5 million and the per unit fair value was $13.25.2018:
 2018 AFCF 2017 AFCF 2016 AFCF
Fair value, net of forfeitures to date (in millions)
$11
 $6
 $7
Achievement of target payout118% 98% 114%
Year-end stock price used in determining fair value$35.34
 $24.79
 $21.63

We recognize the expense on these awards in our consolidated statements of operations over the vesting period which is three years after the date of grant.

Expense Attribution

We recognize compensation expense for our stock incentive plan using a straight-line method over the substantive vesting period. Most of our stock awards provide for immediate vesting upon death or disability of the participant. In addition, our stock grants to employees provide for accelerated vesting of our stock-based awards, other than performance-based and market-based awards, upon retirement. In accordance with the terms of our stock grants, for employees who will become retirement eligible prior to the vest date we expense stock-based awards, other than performance-based and market-based awards, over the greater of one year or the period between grant date and retirement-eligibility. The performance-based and market-based awards discussed above do not contain provisions that would accelerate the full vesting of the awards upon retirement-eligibility.

We recognize stock-based compensation expense for the value of the portion of awards that are ultimately expected to vest. FASB ASC Topic 718, Compensation – Stock Compensation requiresallows forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The term “forfeitures” is distinct from “cancellations” or “expirations” and represents only the unvested portion of the surrendered stock-based award. We have applied, based on an analysis of our historical forfeitures, a weighted-average annual forfeiture rate of approximately eightsix percent to all unvested stock-based awards as of December 31, 2016,2018, which represents the portion that we expect will be forfeited each year over the vesting period. We re-evaluate this analysis annually or more frequently if there are significant changes in circumstances and adjust the forfeiture rate as necessary. Ultimately, we will only recognize expense for those shares that vest.

Unrecognized Compensation Cost

We expect to recognize the following future expense for awards outstanding as of December 31, 2016:2018:
 
 Unrecognized
 Compensation  Cost
(in millions)(1)
 
Weighted Average
Remaining
Vesting Period
(in years)
 Unrecognized
 Compensation Cost
(in millions) (1)
 
Weighted Average Remaining
Vesting Period
(in years)
Stock options $27
  $32
  
Non-vested stock awards 136
  151
  
 $163
 1.3$183
 1.4
(1)Amounts presented represent compensation cost, net of estimated forfeitures.

Employee Stock Purchase Plans

Our global employee stock purchase plan provides for the granting of options to purchase up to 50 million shares of our common stock to all eligible employees. Under the global employee stock purchase plan, we grant each eligible employee, at the beginning of each six-month offering period, an option to purchase shares of our common stock equal to not more than ten percent of the employee’s eligible compensation or the statutory limit under the U.S. Internal Revenue Code. Such options may be exercised only to the extent of accumulated payroll deductions at the end of the offering period, at a purchase price equal to 85 percent of the fair market value of our common stock at the beginning or end of each offering period, whichever is less. As of December 31, 2016,2018, there were approximately 1510 million shares available for future issuance under the employee stock purchase plan.

Information related to shares issued or to be issued in connection with the employee stock purchase plan based on employee contributions and the range of purchase prices is as follows:
 (shares in thousands)
 2016 2015 2014
Shares issued or to be issued 2,337
 2,529
 2,618
Range of purchase prices $15.29 - $18.39
 $11.24 - $15.13
 $10.12 - $11.04
 Year Ended December 31,
 2018 2017 2016
Shares issued or to be issued (in thousands)
2,452
 2,491
 2,337
Range of purchase prices$21.49 - $27.91
 $18.60 - $21.07
 $15.29 - $18.39
Expense recognized (in millions)
$17
 $13
 $11

We use the Black-Scholes option-pricing model to calculate the grant-date fair value of shares issued under the employee stock purchase plan. We recognize expense related to shares purchased through the employee stock purchase plan ratably over the offering period. We recognized $11 million in expense associated with our employee stock purchase plan in 2016, $9 million in 2015 and $8 million in 2014.

NOTE NM – WEIGHTED AVERAGE SHARES OUTSTANDING

 Year Ended December 31,Year Ended December 31,
(in millions) 2016 2015 20142018 2017 2016
Weighted average shares outstanding - basic 1,357.6
 1,341.2
 1,324.3
1,381.0
 1,370.1
 1,357.6
Net effect of common stock equivalents 19.6
 
 
20.4
 22.6
 19.6
Weighted average shares outstanding - assuming dilution 1,377.2
 1,341.2
 1,324.3
1,401.4
 1,392.7
 1,377.2
Our weighted-average shares outstanding for earnings per share calculations excluded common stock equivalents of 22 million in 2015 and 24 million in 2014 due to our net loss positions.
Weighted-average shares outstanding, assuming dilution, excludes theThe impact of less than 1 million stock options for 2016, 2 million stock options for 2015 and 12 million stock options for 2014, due to theoutstanding with exercise prices of these stock options being greater than the average fair market value of our common stock during the year.was immaterial for all periods presented.

NOTE ON – SEGMENT REPORTING

We have three reportable segments comprised of:of MedSurg, Rhythm and Neuro, and Cardiovascular, Rhythm Management, and MedSurg, which represent an aggregation of our operating segments.

Each of our reportable segments generates revenues from the sale of medical devices. We measure and evaluate our reportable segments based on segment net sales and operating income, excluding the impact of changes in foreign currency and sales from divested businesses. Sales generated from reportable segments and divested businesses, as well as operating results of reportable segments and corporate expenses, are based on internally-derived standard currency exchange rates, which may differ from year to year, and do not include intersegment profits. As needed,In 2017, we restateupdated our presentation of segment information for the prior period based on our internally-derived standard currency exchange rates used for the current period in ordernet sales and operating income to removeinclude the impact of foreign currency exchange fluctuation.fluctuations, since our chief operating decision maker (CODM) reviews operating results both including and excluding the impact of foreign currency fluctuations, and the following presentation more closely aligns to our consolidated financial statements. We exclude from segment operating income certain corporate-related expenses and certain transactions or adjustments that our chief operating decision makerCODM considers to be non-operational, such as amounts related to amortization expense, intangible asset impairment charges; acquisition-, divestiture-, litigation-, restructuring-charges, acquisition-related items, restructuring and restructuring-related net chargesitems and credits; pension termination charges; and amortization expense.litigation-related items. Although we exclude these amounts from segment operating income, they are included in reported Income (loss) before income taxes on the consolidated operating income (loss)statements of operations and are included in the reconciliation below.

Effective January 1, 2018, following organizational changes to align the structure of our business with our focus on active implantable devices, we revised our reportable segments, in accordance with FASB ASC Topic 280, Segment Reporting. The revision reflects a reclassification of our Neuromodulation business from our MedSurg segment to our newly created Rhythm and Neuro segment. We have revised prior year amounts to conform to the current year’s presentation (as denoted with an asterisk (*) throughout). There was no revision to operating segments or reporting units as a result of the organizational change.

A reconciliation of the totals reported for the reportable segments to the applicable line items in our accompanying consolidated statements of operations is as follows:follows (in millions, except percentages):
  Year Ended December 31,
(in millions) 2016 2015 2014
Net sales      
Interventional Cardiology $2,524
 $2,242
 $2,092
Peripheral Interventions 1,093
 975
 861
Cardiovascular 3,617
 3,217
 2,953
       
Cardiac Rhythm Management 1,994
 1,934
 1,922
Electrophysiology 261
 248
 228
Rhythm Management 2,255
 2,182
 2,150
       
Endoscopy 1,565
 1,422
 1,343
Urology and Pelvic Health 1,065
 735
 542
Neuromodulation 574
 512
 474
MedSurg 3,204
 2,669
 2,359
Net sales allocated to reportable segments 9,076
 8,068
 7,462
Sales generated from business divestitures 
 
 4
Impact of foreign currency fluctuations (690) (591) (86)
  $8,386
 $7,477
 $7,380
 Year Ended December 31,
Net sales2018 2017 2016
MedSurg*$3,007
 $2,742
 $2,445
Rhythm and Neuro*3,041
 2,808
 2,649
Cardiovascular3,777
 3,500
 3,292
 $9,823
 $9,048
 $8,386

  Year Ended December 31,
(in millions) 2016 2015 2014
Depreciation expense      
Cardiovascular $122
 $116
 $120
Rhythm Management 83
 94
 92
MedSurg 74
 73
 75
Depreciation expense allocated to reportable segments 279
 283
 287
Impact of foreign currency fluctuations (9) (9) 
  $270
 $274
 $287
 Year Ended December 31,
Depreciation expense2018 2017 2016
MedSurg*$72
 $68
 $60
Rhythm and Neuro*91
 91
 91
Cardiovascular133
 120
 118
 $296
 $279
 $270

 Year Ended December 31,Year Ended December 31,
(in millions) 2016 2015 2014
Income (loss) before income taxes      2018 2017 2016
MedSurg*$1,102
 $984
 $852
Rhythm and Neuro*655
 537
 402
Cardiovascular $1,137
 $972
 $767
1,117
 988
 946
Rhythm Management 404
 328
 289
MedSurg 1,045
 856
 746
Operating income allocated to reportable segments 2,586
 2,156
 1,802
2,875
 2,509
 2,200
Corporate expenses and currency exchange (565) (486) (308)
Intangible asset impairment charges; pension termination charges; and acquisition- and divestiture-related net charges, litigation-related net charges, and restructuring- and restructuring-related net charges (1,029) (1,502) (1,357)
Corporate expenses, including hedging activities(372) (252) (179)
Intangible asset impairment charges, acquisition-related, restructuring- and restructuring-related and litigation-related net (charges) credits(398) (407) (1,029)
Amortization expense (545) (495) (438)(599) (565) (545)
Operating income (loss) 447
 (327) (301)1,506
 1,285
 447
Other expense, net (270) (323) (208)(85) (353) (270)
 $177
 $(650) $(509)$1,422
 $933
 $177

 Year Ended December 31,
Operating income as a percentage of segment net sales2018 2017 2016
MedSurg*36.7% 35.9% 34.9%
Rhythm and Neuro*21.5% 19.1% 15.2%
Cardiovascular29.6% 28.2% 28.7%

 As of December 31,
Total assets2018 2017
MedSurg*$1,846
 $1,871
Rhythm and Neuro*1,696
 1,607
Cardiovascular1,954
 1,824
Total assets allocated to reportable segments5,497
 5,302
Goodwill7,911
 6,998
Other intangible assets, net6,372
 5,837
All other corporate assets1,219
 905
 $20,999
 $19,042

 As of December 31,
Long-lived assets2018 2017 2016
U.S.$1,061
 $1,065
 $1,082
Ireland242
 210
 181
Other countries478
 422
 367
Property, plant and equipment, net1,782
 1,697
 1,630
Goodwill7,911
 6,998
 6,678
Other intangible assets, net6,372
 5,837
 5,883
 $16,064
 $14,531
 $14,191

NOTE O – REVENUE

We generate revenue primarily from the sale of single-use medical devices and present revenue net of sales taxes in our consolidated statements of operations. The following tables disaggregate our revenue from contracts with customers by business and geographic region (in millions):
 Year Ended December 31,
Businesses2018 2017 2016
Endoscopy     
U.S.$980
 $894
 $770
International781
 724
 670
Worldwide1,762
 1,619
 1,440
      
Urology and Pelvic Health     
U.S.864
 785
 711
International381
 339
 294
Worldwide1,245
 1,124
 1,005
      
Cardiac Rhythm Management     
U.S.1,159
 1,135
 1,110
International792
 760
 740
Worldwide1,951
 1,895
 1,850
      
Electrophysiology     
U.S.150
 136
 129
International161
 142
 114
Worldwide311
 278
 243
      
Neuromodulation     
U.S.624
 517
 474
International155
 118
 82
Worldwide779
 635
 556
      
Interventional Cardiology     
U.S.1,154
 1,122
 1,013
International1,436
 1,297
 1,268
Worldwide2,590
 2,419
 2,281
      
Peripheral Interventions     
U.S.608
 575
 552
International579
 506
 459
Worldwide1,187
 1,081
 1,011
      
Total Company     
U.S.5,538
 5,162
 4,759
International4,286
 3,885
 3,627
Net Sales$9,823
 $9,048
 $8,386


  As of December 31,
(in millions) 2016 2015
Total assets    
Cardiovascular $1,748
 $1,583
Rhythm Management 1,250
 1,279
MedSurg 1,499
 1,141
Total assets allocated to reportable segments 4,497
 4,003
Goodwill 6,678
 6,473
Other intangible assets, net 5,883
 6,194
All other corporate assets 1,038
 1,463
  $18,096
 $18,133
 Year Ended December 31,
Geographic Regions2018 2017 2016
U.S.$5,538
 $5,162
 $4,759
EMEA (Europe, Middle East and Africa)2,176
 1,940
 1,802
APAC (Asia-Pacific)1,727
 1,587
 1,492
LACA (Latin America and Canada)383
 358
 333
 $9,823
 $9,048
 $8,386
      
Emerging Markets (1)$1,072
 $909
 $793
(1)Emerging Markets is defined as certain countries that we believe have strong growth potential based on their economic conditions, healthcare sectors and our global capabilities. Currently, we include 20 countries in our definition of Emerging Markets.

Contract liabilities are classified within Other current liabilities and Other long-term liabilities on our accompanying consolidated balance sheets. Our deferred revenue balance was $373 million as of December 31, 2018 and $411 million as of January 1, 2018. Our contractual liabilities are primarily composed of deferred revenue related to the LATITUDE Patient Management System. Revenue is recognized over the average service period which is based on device and patient longevity. We recognized revenue of $117 million in 2018 that was included in the above January 1, 2018 contract liability balance. We have elected not to disclose the transaction price allocated to unsatisfied performance obligations when the original expected contract duration is one year or less. In addition, we have not identified material unfulfilled performance obligations for which revenue is not currently deferred. Refer to Note A – Significant Accounting Policies for additional information on our accounting policies relating to revenue recognition.


Enterprise-Wide Information (based on actual currency exchange rates)
  Year Ended December 31,
(in millions) 2016 2015 2014
Net sales      
Interventional Cardiology $2,281
 $2,033
 $2,057
Cardiac Rhythm Management 1,850
 1,807
 1,912
Endoscopy 1,440
 1,306
 1,323
Peripheral Interventions 1,011
 904
 850
Urology and Pelvic Health 1,005
 693
 535
Neuromodulation 556
 501
 472
Electrophysiology 243
 233
 227
  8,386
 7,477
 7,376
Sales generated from divested businesses 
 
 4
  $8,386
 $7,477
 $7,380
       
United States $4,759
 $4,229
 $3,885
Japan 750
 602
 678
Other countries 2,877
 2,646
 2,813
  8,386
 7,477
 7,376
Sales generated from divested businesses 
 
 4
  $8,386
 $7,477
 $7,380

  As of December 31,
(in millions) 2016 2015 2014
Long-lived assets      
United States $1,082
 $1,018
 $1,002
Ireland 181
 170
 197
Other foreign countries 367
 302
 308
Property, plant and equipment, net 1,630
 1,490
 1,507
Goodwill 6,678
 6,473
 5,898
Other intangible assets, net 5,883
 6,194
 5,606
  $14,191
 $14,157
 $13,011


NOTE P – CHANGES IN OTHER COMPREHENSIVE INCOME

The following table provides the reclassifications out of otherOther comprehensive income, for the years ended December 31, 2016 and December 31, 2015. Amounts in the chart below are presented net of tax.tax:
(in millions)Foreign Currency Translation Adjustments Net Change in Derivative Financial Instruments Net Change in Available-for-Sale Securities Net Change in Defined Benefit Pensions and Other Items Total
Balance as of December 31, 2017$(32) $1
 $(1) $(27) $(59)
Other comprehensive income (loss) before reclassifications
 96
 
 (2) 94
(Income) loss amounts reclassified from accumulated other comprehensive income(21) 14
 1
 4
 (3)
Total other comprehensive income (loss)(21) 110
 
 2
 91
Balance as of December 31, 2018$(53) $111
 $
 $(25) $33

Year Ended December 31, 2016     
(in millions)Foreign Currency Translation AdjustmentsUnrealized Gains/Losses on Derivative Financial Instruments
Unrealized Gains/Losses
on Available-for-Sale Securities
Defined Benefit Pension Items / OtherTotal
Beginning Balance$(54)$152$—$(10)$88
Other comprehensive income/(loss) before reclassifications(25)40(6)(17)(8)
(Gain)/Loss reclassified from accumulated other comprehensive income(85)6(79)
Net current-period other comprehensive income(25)(45)(6)(11)(87)
Ending Balance$(79)$107$(6)$(21)$1
      
(in millions)Foreign Currency Translation Adjustments Net Change in Derivative Financial Instruments Net Change in Available-for-Sale Securities Net Change in Defined Benefit Pensions and Other Items Total
Balance as of December 31, 2016$(79) $107
 $(6) $(21) $1
Other comprehensive income (loss) before reclassifications48
 (65) (10) (8) (35)
(Income) loss amounts reclassified from accumulated other comprehensive income
 (42) 15
 2
 (25)
Total other comprehensive income (loss)48
 (106) 5
 (6) (59)
Balance as of December 31, 2017$(32) $1
 $(1) $(27) $(59)

Year Ended December 31, 2015    
(in millions)Foreign Currency Translation AdjustmentsUnrealized Gains/Losses on Derivative Financial InstrumentsDefined Benefit Pension Items / OtherTotal
Beginning Balance$(38)$219$(37)$144
Other comprehensive income/(loss) before reclassifications(16)70(3)51
(Gain)/Loss reclassified from accumulated other comprehensive income(137)30(107)
Net current-period other comprehensive income(16)(67)27(56)
Ending Balance$(54)$152$(10)$88

The income tax impact of the amounts in other comprehensive income for unrealized gains/losses on derivative financial instruments before reclassifications was an expense of $23 million in 2016 and an expense of $39 million in 2015. The gains and losses on derivative financial instruments reclassified from accumulated other comprehensive income were reduced by income tax impacts of $48 million in 2016 and $78 million in 2015. Refer to Note ED Hedging Activities and Fair Value Measurements for further detail on the reclassifications related to derivatives.

The income tax impactWe adopted Update No. 2016-01 in the first quarter of 2018, and as a result of adopting the amounts instandard, we recorded a cumulative effect adjustment to retained earnings for unrealized gains and losses for available-for-sale securities previously recorded to Accumulated other comprehensive income for(loss), net of tax.

The gains and losses on defined benefit and pension items before reclassifications was a benefit of $9 million in 2016 and a benefit of $2 million in 2015. The gains and losses on defined benefit and pension items reclassified from accumulatedAccumulated other comprehensive income were reduced by income(loss), net of tax impacts of $2 million in 2016 and $17 million in 2015.
The gains and losses on available-for-sale securities were reduced by immaterial income tax impacts in 2016. Refer to Note E – Fair Value Measurements for further detail on the gains2018 and losses on available-for-sale securities.in 2017.


NOTE Q – NEW ACCOUNTING PRONOUNCEMENTS

From time to time,Periodically, new accounting pronouncements are issued by the FASB or other standard setting bodies. Recently issued standards typically do not require adoption until a future effective date. Prior to their effective date, we evaluate the pronouncements to determine the potential effects of adoption on our consolidated financial statements.

Standards Implemented Since December 31, 2015

ASC Update No. 2015-05

In April 2015, the FASB issued ASC Update No. 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. Update No. 2015-05 provides accounting guidance on how customers should treat cloud computing arrangements. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. Update No. 2015-05 is effective for annual reporting periods beginning after December 15, 2015 and interim periods within those reporting periods. We elected to adopt the amendments prospectively to all arrangements entered into or materially modified after the effective date. The adoption of Update No. 2015-05 did not have a material impact on our financial position or results of operations.

ASC Update No. 2015-12

In July 2015, the FASB issued ASC Update No. 2015-12, Plan Accounting: Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), and Health and Welfare Benefit Plans (Topic 965). Update No. 2015-12 has three parts. Part I designates contract value as the only required measure for fully benefit-responsive investment contracts. Part II simplifies the investment disclosure requirements under Topics 820, 960, 962, and 965 for employee benefits plans and Part III provides an alternative measurement date for fiscal periods that do not coincide with a month-end date. Update No. 2015-12 is effective for fiscal years beginning after December 15, 2015. The adoption of Update No. 2015-12 did not have a material impact on our financial position or results of operations.

ASC Update No. 2015-16

In September 2015, the FASB issued ASC Update No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement - Period Adjustments. Update No. 2015-16 eliminates the requirement to restate prior period financial statements for measurement period adjustments following a business combination. Update No. 2015-16 requires that the cumulative impact of a measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified. The prior period impact of the adjustment should be either presented separately on the face of the income statement or disclosed in the notes. Update No. 2015-16 is effective for fiscal years beginning after December 15, 2015. The adoption of Update No. 2015-16 did not impact our financial position or results of operations.

ASC Update No. 2015-17

In November 2015, the FASB issued ASC Update No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes. Update No. 2015-17 requires that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position. It is effective for fiscal years beginning after December 15, 2016; however, earlier application is permitted. We elected to early adopt Update No. 2015-17 on a prospective basis during the first quarter of 2016; as such, prior periods were not retrospectively adjusted. The adoption of Update No. 2015-17 did not have a material impact on our financial position or results of operations.

ASC Update No. 2016-07

In March 2016, the FASB issued ASC Update No. 2016-07, Investments - Equity Method and Joint Ventures (Topic 323). When a previously held investment qualifies for equity method accounting due to an increase in ownership interest or influence, Update No. 2016-07 eliminates the requirement for investors to adjust results retroactively as if the equity method had been in effect during prior periods the investment was held. Instead, it requires investors to adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. We elected to early adopt Update No. 2016-07 on a prospective basis. The adoption of Update No. 2016-07 did not impact our financial position or results of operations.

Standards to be Implemented

ASC Update No. 2014-09

In May 2014, the FASB issued ASC Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). Update No. 2014-09 provides enhancements to the quality and consistency of how revenue is reported while also improving comparability in the financial statements of companies using International Financial Reporting Standards and U.S. GAAP. The core principle requires entities to recognize revenue in a manner that depicts the transfer of goods or services to customers in amounts that reflect the consideration an entity expects to be entitled to in exchange for those goods or services. In July 2015, the FASB voted to approve a one year deferral, making the standard effective for public entities for annual and interim periods beginning after December 15, 2017.

In March 2016, the FASB issued ASC Update No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net). The purpose of Update No. 2016-08 is to clarify the guidance on principal versus agent considerations. It includes indicators that help to determine whether an entity controls the specified good or service before it is transferred to the customer and to assist in determining when the entity satisfied the performance obligation and as such, whether to recognize a gross or a net amount of consideration in their consolidated statement of operations.

In April 2016, the FASB issued ASC Update No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing. Update No. 2016-10 clarifies that entities are not required to assess whether promised goods or services are performance obligations if they are immaterial in the context of the contract. Update No. 2016-10 also addresses how to determine whether promised goods or services are separately identifiable and permits entities to make a policy election to treat shipping and handling costs as fulfillment activities. In addition, it clarifies key provisions in Topic 606 related to licensing.

In May 2016, the FASB issued ASC Update No. 2016-11, Revenue Recognition (Topic 605) and Derivatives and Hedging (Topic 815). Update No. 2016-11 rescinds previous SEC comments that were codified in Topic 605, Topic 932 and Topic 815. Upon adoption of ASC 606, certain SEC comments including guidance on accounting for shipping and handling fees and costs and consideration given by a vendor to a customer should not be relied upon.

In May 2016, the FASB also issued ASC Update No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow Scope Improvements and Practical Expedients. Update No. 2016-12 provides clarity around collectibility, presentation of sales taxes, non-cash consideration, contract modifications at transition and completed contracts at transition. Update No. 2016-12 also includes a technical correction within ASC 606 related to required disclosures if the guidance is applied retrospectively upon adoption.

In December 2016, the FASB issued ASC Update No. 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with Customers. Update No. 2016-20 allows entities not to make quantitative disclosures about remaining performance obligations in certain cases and requires entities that use any of the optional exemptions to expand their qualitative disclosures. Update No. 2016-20 also clarifies other areas of the new revenue standard, including disclosure requirements for prior period performance obligations, impairment guidance for contract costs and the interaction of impairment guidance in ASC 340-40 with other guidance elsewhere in the Codification.

We expect to adopt Topic 606, and the aforementioned updates, effective January 1, 2018. We established a cross-functional implementation team consisting of representatives from all of our business divisions and regions. During 2016 we analyzed the impact of the standard on our contract portfolio by reviewing a representative sample of our contracts to identify potential differences that would result from applying the requirements of the new standard. The implementation team has apprised both management and the audit committee of project status on a recurring basis.

We have not finalized our assessment of the impact of Topic 606. We continue to analyze performance obligations, variable consideration and disclosures. Additionally, we are monitoring updates issued by the FASB. During the first half of 2017, we expect to substantially complete our impact assessment and initiate efforts to redesign impacted processes, policies and controls.

ASC Update No. 2016-01

In January 2016, the FASB issued ASC Update No. 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. It is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early application of certain provisions is permitted. Update 2016-01 requires entities to measure equity investments that do not result in consolidation and are not accounted for under the equity method at fair

value with changes recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. It also simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. Update 2016-01 also requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset and liability. The adoption of Update No. 2016-01 is not expected to have a material impact on our financial position or results of operations.

ASC Update No. 2016-02

In February 2016, the FASB issued ASC Update No. 2016-02, Leases (Topic 842). It is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Earlier application is permitted.The purpose of Update No. 2016-02 is intended to increase the transparency and comparability among organizations by recognizing lease assetassets and lease liabilities on the balance sheet, including those previously classified as operating leases under current U.S. GAAP, and disclosing key information about leasing arrangements. We are in the process of determining the effect that the adoption of this standard will have on our financial position and results of operations.

ASC Update No. 2016-09

In March 2016, the FASB issued ASC Update No. 2016-09, Compensation- Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This updateTopic 842, as amended, is effective for public entities for annual reporting periods beginning after December 15, 2016,2018, including interim periods within those fiscalannual periods. Early adoption is permitted. The purpose

We currently plan to adopt the standard using the transition method provided by ASC Update No. 2018-11, Leases(Topic 842): Targeted Improvements. Under this method, we will initially apply the new leasing rules on January 1, 2019, rather than at the earliest comparative period presented in the financial statements. Prior periods presented will be in accordance with the existing lease guidance.

Upon transition, we plan to apply the package of the update ispractical expedients permitted under Topic 842 transition guidance to simplify several areas ofour entire lease portfolio at January 1, 2019. As a result, we are not required to reassess (i) whether any expired or existing contracts are or contain leases, (ii) the accounting for share-based payment transactions, including the income tax consequences, classification of awardsany expired or existing leases, and (iii) initial direct costs for any existing leases. Furthermore, we will be electing not to separate lease and non-lease components for the majority of our leases. Instead, for these applicable classes of underlying assets, we will account for each separate lease component and the non-lease components associated with that lease component, as either equitya single lease component.

As a result of adopting Topic 842, we expect to recognize additional right-of-use assets and corresponding liabilities for our existing lease portfolio on our consolidated balance sheets of approximately $300 million, with no material impact to our consolidated statements of operations or liabilities, and classification on the statementconsolidated statements of cash flows. Upon adoption in 2017, a cumulative effect adjustment of an amount still being determined will be recorded to retained earnings for windfall tax benefits not previously recognized and all future windfall tax benefits will be recognized through income tax expense. We estimate the benefit to income tax expense to be between $20 million and $30 million in 2017 with the majority of the benefit occurring duringFor the first quarter of 2017 due2019, we will provide additional disclosures in the notes to vestingour consolidated statements of operations regarding our leasing portfolio, including key judgements and assumptions and the Company’s annual grants. Beginningdiscount rate used in calculating our right-of-use assets and corresponding liabilities. Please refer to Note F - Leases and Other Purchase Obligations for information regarding our lease portfolio as of December 31, 2018 as accounted for under ASC Topic 840, Leases.

To ensure we meet the reporting and disclosure requirements of Topic 842, we implemented in 2018 a new lease administration and lease accounting system that will track all our material leasing arrangements. In addition, in the first quarter of 2017,2019, we will disclosedesigned new internal controls to ensure the actual effectcompleteness and accuracy of the transition adjustment and financial reporting under Topic 842. We also established monitoring controls to ensure we have appropriate mechanisms in place to identify material leases timely, particularly contracts that the adoption has on our financial position and results of operations.may contain embedded lease features.

ASC Update No. 2016-13

In June 2016, the FASB issued ASC Update No. 2016-13, Financial Instruments - Credit Losses (Topic(Topic 326): Measurement of Credit Losses on Financial Instruments. The update is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for fiscal years beginning after December 15, 2018. The purpose of Update No. 2016-13 is to replace the current incurred loss impairment methodology for financial assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates. We are in the process of determining the effect that the adoption will have on our financial position and results of operations.

ASC Update No. 2016-15

In August 2016, the FASB issued ASC Update No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update2016-13 is effective for fiscal yearsannual periods beginning after December 15, 2017 and2019, including interim periods

within those fiscal years.annual periods. Early adoption is permitted including adoption in an interim period. The purpose of Update No. 2016-15 is to reduce the diversity in practice in presentation and classification of the following items within the statement of cash flows: debt prepayments, settlement of zero coupon debt instruments, contingent consideration payments, insurance proceeds, securitization transactions and distributions from equity method investees. The update also addresses classification of transactions that have characteristics of more than one class of cash flows. We are in the process of determining the effect that the adoption will have on our financial position and results of operations.

ASC Update No. 2016-16

In October 2016, the FASB issued ASU Update No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. The update is effective for fiscal yearsannual periods beginning after December 15, 2017, including interim reporting periods within those fiscal years. Early adoption is permitted as of the beginning of an annual reporting period for which financial statements (interim or annual) have not been issued or made available for issuance. The purpose of Update No. 2016-16 is to allow an entity to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs, as

opposed to waiting until the asset is sold to an outside party.2018. We are in the process of determining the effect that the adoption will have on our financial position and results of operations.

ASC Update No. 2016-172018-15

In October 2016, the FASB issued ASU Update No. 2016-17, Consolidation (Topic 810): Interests Held through Related Parties That Are under Common Control. The update is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The purpose of Update No. 2016-17 is to amend the consolidation guidance from ASU Update No. 2015-02 on how a reporting entity that is the single decision maker of a variable interest entity (VIE) should treat indirect interests in the entity held through related parties that are under common control with the reporting entity when determining whether it is the primary beneficiary of that VIE. The amendment requires that a single decision maker include those indirect interests held through related parties that are under common control with the single decision maker on a proportionate basis consistent with indirect interests held through other related parties. Update No. 2016-17 is not expected to have a material impact on our financial position or results of operations.

ASC Update No. 2016-18

In November 2016,August 2018, the FASB issued ASC Update No. 2016-18,2018-15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Statement of Cash Flows (Topic 230): Restricted Cash. Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service ContractThe update is effective for fiscal years beginning after December 15, 2017, including interim reporting periods within those fiscal years. Early adoption is permitted.. The purpose of Update No. 2016-182018-15 is to clarify guidance and presentation relatedalign the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to restricted cashdevelop or obtain internal-use software (and hosting arrangements that include an internal-use software license). Update No. 2018-15 is effective for annual periods beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted, including adoption in the statement of cash flows. The amendment requires beginning-of-period and end-of-period total amounts shown on the statement of cash flows to include cash and cash equivalents as well as restricted cash and restricted cash equivalents.any interim period. We are in the process of determining the effect that the adoption will have on our financial position and results of operations.

ASC Update No. 2016-19

In December 2016, the FASB issued ASC Update No. 2016-19, Technical Corrections and Improvements. The purpose of Update No. 2016-19 is primarily to clarify or correct unintended application of guidance that affects a wide variety of topics in the ASC. The update is effective immediately for most of the amendments. Six amendments in Update No. 2016-19 clarify guidance or correct references in the ASC are effective for fiscal years beginning after December 15, 2016, including interim reporting periods within those fiscal years. Early application is permitted. We are in the process of determining the effect that the adoption will have on our financial position and results of operations.

ASC Update No. 2017-01

In January 2017, the FASB issued ASC Update No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The update is effective for fiscal years beginning after December 15, 2017, including interim periods within those periods. Early adoption is permitted, including for interim or annual periods in which the financial statements have not been issued or made available for issuance. The purpose of Update No. 2017-01 is to change the definition of a business to assist entities with evaluating when a set of transferred assets and activities is a business. The adoption of Update No. 2017-01 is not expected to have a material impact on our financial position or results of operations.

ASC Update No. 2017-04

In January 2017, the FASB issued ASC Update No. 2017-04, Intangibles - Goodwill and Other Topics (Topic 350): Simplifying the Test for Goodwill Impairment. The update is effective for fiscal years beginning after December 15, 2019, including interim periods within those periods. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The purpose of Update No. 2017-04 is to reduce the cost and complexity of evaluating goodwill for impairment. It eliminates the need for entities to calculate the impaired fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. Under this amendment, an entity will perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An impairment charge is recognized for the amount by which the carrying value exceeds the reporting unit's fair value. We anticipate early adopting Update No. 2017-04 in fiscal year 2017 on a prospective basis.

No other new accounting pronouncements, issued or effective, during the period had, or is expected to have, a material impact on our consolidated financial statements.

NOTE R - EMPLOYEE RETIREMENT PLANS

Following our 2006 acquisition of Guidant, we sponsored the Guidant Supplemental Retirement Plan, a frozen, non-qualified defined benefit plan for certain former officers and employees of Guidant. The Guidant Supplemental Retirement Plan was partially funded through a Rabbi Trust that contains segregated company assets within restricted cash used to pay the benefit obligations related to the plan.

We also maintain an Executive Retirement Plan, a defined benefit plan covering executive officers and division presidents. Participants may retire with unreduced benefits once retirement conditions have been satisfied. In addition, we maintain retirement plans covering certain international employees.

We use a December 31 measurement date for these plans and record the underfunded portion as a liability within non-current liabilities, with the current portion within accrued expenses, on the consolidated balance sheets, recognizing changes in the funded status through OCI. The outstanding obligation is as follows:
 As of December 31, 2018
(in millions)
Accumulated Benefit Obligation (ABO) Projected
Benefit
Obligation (PBO)
 Fair value of Plan Assets Underfunded
PBO Recognized
Executive Retirement Plan$17
 $20
 $
 $20
Guidant Supplemental Retirement Plan (frozen)30
 30
 
 30
International Retirement Plans166
 182
 107
 75
 213
 $232
 $107
 $125
 As of December 31, 2017
(in millions)
Accumulated Benefit Obligation (ABO) Projected
Benefit
Obligation (PBO)
 Fair value of Plan Assets Underfunded
PBO Recognized
Executive Retirement Plan$18
 $21
 $
 $21
Guidant Supplemental Retirement Plan (frozen)33
 33
 
 33
International Retirement Plans138
 153
 87
 66
 $189
 $207
 $87
 $120


A rollforward of the changes in the PBO for our funded retirement plans is as follows:
 Year Ended December 31,
(in millions)2018 2017
Beginning obligations$207
 $152
Acquired and established plans (1)23
 33
Service costs14
 13
Interest costs4
 4
Actuarial (gain) loss(1) 2
Plan amendments and assumption changes(2) (1)
Benefits paid(10) (8)
Impact of foreign currency fluctuations(3) 11
Ending obligation$232
 $207
(1)Plans obtained through acquisition and other increases in connection with our international operations.

The critical assumptions associated with our employee retirement plans as of December 31, 2018 and are as follows:
 Discount Rate Expected Return on Plan Assets Rate of Compensation Increase
Executive Retirement Plan4.00% N/A 3.00%
Guidant Supplemental Retirement Plan (frozen)4.25% N/A N/A
International Retirement Plans0.50% - 2.34% 1.90% - 4.10% 1.50% - 6.78%

The critical assumptions associated with our employee retirement plans as of December 31, 2017 are as follows:
 Discount Rate Expected Return on Plan Assets Rate of Compensation Increase
Executive Retirement Plan3.25% N/A 3.00%
Guidant Supplemental Retirement Plan (frozen)3.50% N/A N/A
International Retirement Plans0.50% - 2.25% 2.50% - 4.10% 1.50% - 6.78%

We base our discount rate on the rates of return available on high-quality bonds with maturities approximating the expected period over which benefits will be paid. The rate of compensation increase is based on historical and expected rate increases. We base our rate of expected return on plan assets on historical experience, our investment guidelines and expectations for long-term rates of return. Our international pension plan assets are invested in a variety of securities, primarily equity securities and government bonds. These securities are considered Level 1 and Level 2 investments.

A rollforward of the changes in the fair value of plan assets for our funded retirement plans is as follows:
 Year Ended December 31,
(in millions)2018 2017
Beginning fair value$87
 $54
Acquired and established plans (1)16
 19
Actual return on plan assets(2) 6
Employer contributions14
 10
Participant contributions2
 1
Benefits paid(10) (8)
Impact of foreign currency fluctuations
 4
Ending fair value$107
 $87
(1)Plans obtained through acquisition and other increases in connection with our international operations.

We also sponsor a voluntary 401(k) Retirement Savings Plan for eligible employees. We match 200 percent of employee elective deferrals for the first two percent of employee eligible compensation and 50 percent of employee elective deferrals greater than

two percent, but not exceeding six percent, of employee eligible compensation. Total expense for our matching contributions to the plan was $87 million in 2018, $79 million in 2017 and $72 million in 2016.

QUARTERLY RESULTS OF OPERATIONS
(in millions, except per share data)
(unaudited)

 Three Months EndedThree Months Ended
 Mar 31, June 30, Sept 30, Dec 31,Mar 31, June 30, Sept 30, Dec 31,
2016        
2018       
Net sales $1,964
 $2,126
 $2,105
 $2,191
$2,379
 $2,490
 $2,393
 $2,561
Gross profit 1,391
 1,487
 1,511
 1,572
1,707
 1,751
 1,720
 1,832
Operating income (loss) 293
 (334) 348
 140
407
 392
 388
 319
Net income (loss) 202
 (207) 228
 124
298
 555
 432
 386
Net income (loss) per common share - basic $0.15
 $(0.15) $0.17
 $0.09
$0.22
 $0.40
 $0.31
 $0.28
Net income (loss) per common share - assuming dilution $0.15
 $(0.15) $0.17
 $0.09
$0.21
 $0.40
 $0.31
 $0.27
               
2015        
2017       
Net sales $1,768
 $1,843
 $1,888
 $1,978
$2,160
 $2,257
 $2,222
 $2,408
Gross profit 1,248
 1,303
 1,349
 1,405
1,510
 1,625
 1,585
 1,735
Operating income (loss) 24
 219
 (299) (271)364
 225
 377
 319
Net income (loss) (1) 102
 (198) (142)290
 146
 283
 (615)
Net income (loss) per common share - basic $(0.00) $0.08
 $(0.15) $(0.11)$0.21
 $0.11
 $0.21
 $(0.45)
Net income (loss) per common share - assuming dilution $(0.00) $0.08
 $(0.15) $(0.11)$0.21
 $0.11
 $0.20
 $(0.45)

Our reported results for 20162018 included amortization expense, intangible asset impairment charges, acquisition-, litigation-,acquisition-related net charges, restructuring and restructuring-related net charges, litigation-related net charges, certain investment impairment charges and amortization expensecertain discrete tax items (after tax) of: $176$157 million in the first quarter, $580$13 million in the second quarter, $140$53 million in the third quarter and $291$166 million in the fourth quarter. These after-tax net charges consisted primarily of: $512$328 million of litigation-related net chargescredit related to certain discrete tax items and $478$520 million of amortization expense.

Our reported results for 20152017 included amortization expense, intangible asset impairment charges, acquisition-, litigation-,acquisition-related net charges, restructuring and restructuring-related net charges, pension terminationlitigation-related net charges, debt extinguishmentinvestment impairment charges and certain discrete tax items and amortization expense (after tax) of: $287$107 million in the first quarter, $192$298 million in the second quarter, $524$149 million in the third quarter and $504 million$1.095 billion in the fourth quarter. These after-tax net charges consisted primarily of: $705$861 million related to the estimated one-time net income tax charge related to the enactment of the TCJA in December 2017, $492 million of amortization expense and $172 million of litigation-related net charges and $446 million of amortization expense.charges.




ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES
Disclosure Controls and Procedures
Our management, with the participation of our Chief Executive Officer (CEO) and Executive Vice President and Chief Financial Officer (CFO), evaluated the effectiveness of our disclosure controls and procedures as of December 31, 20162018 pursuant to Rule 13a-15(b) of the Securities Exchange Act of 1934, as amended. Disclosure controls and procedures are designed to ensure that material information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and ensure that such material information is accumulated and communicated to our management, including our CEO and CFO, as appropriate to allow timely decisions regarding required disclosure. Based on their evaluation, our CEO and CFO concluded that as of December 31, 2016,2018, our disclosure controls and procedures were effective.
Management’s Annual Report on Internal Control over Financial Reporting
Management’s annual report on our internal control over financial reporting is contained in Item 7 of this Annual Report.
Report of Independent Registered Public Accounting Firm on Internal Control over Financial Reporting
The report of Ernst & Young LLP on our internal control over financial reporting is contained in Item 7 of this Annual Report.
Changes in Internal Control over Financial Reporting
During the quarter ended December 31, 2016,2018, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.


ITEM 9B. OTHER INFORMATION
None.



PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
The information required by this Item is set forth in our Proxy Statement for the 20172019 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2016,2018 and is incorporated into this Annual Report on Form 10-K by reference.

ITEM 11. EXECUTIVE COMPENSATION
The information required by this Item is set forth in our Proxy Statement for the 20172019 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2016,2018 and is incorporated into this Annual Report on Form 10-K by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS
The information required by this Item is set forth in our Proxy Statement for the 20172019 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2016,2018 and is incorporated into this Annual Report on Form 10-K by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE
The information required by this Item is set forth in our Proxy Statement for the 20172019 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2016,2018 and is incorporated into this Annual Report on Form 10-K by reference.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES
The information required by this Item is set forth in our Proxy Statement for the 20172019 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2016,2018 and is incorporated into this Annual Report on Form 10-K by reference.



PART IV


ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES
(a)(1) Financial Statements.
The response to this portion of Item 15 is set forth under Item 8.
(a)(2) Financial Statement Schedules.
The response to this portion of Item 15 (Schedule II) follows the signature page to this report. All other financial statement schedules are not required under the related instructions or are inapplicable and therefore have been omitted.
(a)(3) Exhibits (* documents filed or furnished with this report, ** certain schedules and exhibits omitted pursuant to Item 601(b)(2) of Regulation S-K.  We agree to furnish supplementally a copy of any omitted schedule or exhibit to the SEC upon request, # compensatory plans or arrangements)
   
EXHIBIT
NO.
 TITLE
   
   
2.1 
   
3.1 
   
3.2 
   
4.1 Specimen Certificate for shares of the Company's Common Stock (incorporated herein by reference to Exhibit 4.1, Registration No. 33-46980).
   
4.2 
Description of Capital Stock contained in Exhibits 3.1 and 3.2.
   
4.3 
   
4.4 
   
4.5 Form of
   
4.6 Form of
   
4.7 
   

4.8 
   
4.9 
   
4.10 
   
4.11 
   
4.12 
   
4.13 
   
4.14 
   
4.15 
   
4.16 
   
4.17 
4.18
   
10.1 
   
10.2 
   
10.3 
   


10.5 
   
10.6 
   
10.7 
   
10.8 
Transaction Agreement, dated as of January 8, 2006, as amended, between the Company and Abbott Laboratories (incorporated herein by reference to Exhibit 10.47, Exhibit 10.48, Exhibit 10.49 and Exhibit 10.50, Annual Report on Form 10-K for year ended December 31, 2005 and Exhibit 10.1, Current Report on Form 8-K dated April 7, 2006, File No. 1-11083).
   
10.9 
   
10.10 
   
10.11 
   
10.12 
   
10.13 
Form of Boston Scientific Corporation Excess Benefit Plan, as amended (incorporated herein by reference to Exhibit 10.1, Current Report on Form 8-K dated June 29, 2005 and Exhibit 10.4, Current Report on Form 8-K dated December 16, 2008, File No. 1-11083).#
   
10.14 
   
10.15 
   
10.16 
   
10.17 
   


10.19 
   
10.20 
Boston Scientific Corporation 2000 Long-Term Incentive Plan, as amended (incorporated herein by reference to Exhibit 10.20, Annual Report on Form 10-K for the year ended December 31, 1999, Exhibit 10.18, Annual Report on Form 10-K for the year ended December 31, 2001, Exhibit 10.1, Current Report on Form 8-K dated December 22, 2004, Exhibit 10.3, Current Report on Form 8-K dated May 9, 2005, and Exhibit 10.3, Current Report on Form 8-K dated December 16, 2008, File No. 1-11083).#
   
10.21 
   
10.22 
   
10.23 
   
10.24 

   
10.25 
   
10.26 
   
10.27 
   
10.28 
   
10.29 
   
10.30 
   
10.31 
   


10.33 
   
10.34 
   
10.35 
   
10.36 
   
10.37 
   
10.38 
   
10.39 
   
10.40 
   
10.41 
   
10.42 
   
10.43 
   
10.44 
   
10.45 
   


10.47 
   
10.48 
   
10.49 
   
10.50 
   
10.51 
   
10.52 
   
10.53 
   
10.54 
   
10.55 
   
10.56 
   
10.57 
   
10.58 
   
10.59 
   


10.61 
   
10.62 
   
10.63 
   
10.64 
   
10.65 
   
10.66 
   
10.67 
   
10.68 
   
10.69 
   
10.70 
   
10.71 
   
10.72 
   
10.73 
   
10.74 

   
10.75 
10.76
10.77
10.78
10.79
10.80
10.81
10.82
10.83
10.84
10.85
10.86
10.87
   

12*10.88 Statement regarding computation
10.89
10.90
10.91
10.92
10.93
10.94
10.95
10.96
10.97
10.98
10.99
10.100
10.101
10.102

10.103
10.104
10.105
10.106
10.107
10.108
   
21* 
   
23* 
   
31.1* 
   
31.2* 
   
32.1* 
   
32.2* 
   
101* Interactive Data Files Pursuant to Rule 405 of Regulation S-T: (i) the Consolidated Statements of Operations for the years ended December 31, 2016, 20152018, 2017 and 2014;2016; (ii) the Consolidated Statements of Comprehensive Income (Loss) as of December 31, 2016, 20152018, 2017 and 2014;2016; (iii) the Consolidated Balance Sheets as of December 31, 20162018 and 2015;2017; (iv) the Consolidated Statements of Stockholders' Equity for the years ended December 31, 2016, 20152018, 2017 and 2014;2016; (v) the Consolidated Statements of Cash Flows for the years ended December 31, 2016, 20152018, 2017 and 2014;2016; (vi) the notes to the Consolidated Financial Statements; and (vii) Schedule II - Valuation and Qualifying Accounts






SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

     
Dated: February 23, 201719, 2019 Boston Scientific Corporation
     
  By:  /s/ Daniel J. Brennan
     
    Daniel J. Brennan
    Executive Vice President and Chief Financial Officer
    (duly authorized officer and principal financial and accounting officer)
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

     
     
Dated: February 23, 201719, 2019 By:  /s/ Daniel J. Brennan
     
    Daniel J. Brennan
    Executive Vice President and Chief Financial Officer
    (Principal Financial and Accounting Officer)

     
     
Dated: February 23, 201719, 2019 By: /s/ Nelda J. Connors
     
    Nelda J. Connors
    Director
     

     
     
Dated: February 23, 201719, 2019 By: /s/ Charles J. Dockendorff
     
    Charles J. Dockendorff
    Director
     

     
     
Dated: February 23, 201719, 2019 By: /s/ Yoshiaki Fujimori
     
    Yoshiaki Fujimori
    Director
     

     
     
Dated: February 23, 201719, 2019 By: /s/ Donna A. James
     
    Donna A. James
    Director
     

     
     
Dated: February 23, 2017By:/s/ Kristina M. Johnson, Ph.D.
Kristina M. Johnson, Ph.D.
Director

Dated: February 23, 201719, 2019 By:  /s/ Edward J. Ludwig
     
    Edward J. Ludwig
    Director
     

     
     
Dated: February 23, 201719, 2019 By:  /s/ Stephen P. MacMillan
     
    Stephen P. MacMillan
    Director
     


     
     
Dated: February 23, 201719, 2019 By: /s/ Michael F. Mahoney
     
    Michael F. Mahoney
    
Director, Chairman of the Board,
President and Chief Executive Officer
    (Principal Executive Officer)


     
     
Dated: February 23, 201719, 2019 By: /s/ David J. Roux
     
    David J. Roux
    Director
     

     
     
Dated: February 23, 201719, 2019 By: /s/ John E. Sununu
     
    John E. Sununu
    Director
     

     
     
Dated: February 23, 201719, 2019 By: /s/ Ellen M. Zane
     
    Ellen M. Zane
    Director
     


Schedule II
VALUATION AND QUALIFYING ACCOUNTS
(in millions)
Description Balance at
Beginning of Year
 
Charges to
Costs and
Expenses (a)
 
Deductions to
Allowances for
Uncollectible
Accounts (b)
 Charges to
(Deductions from)
Other Accounts (c)
 
Balance at
End of Year
 Balance at
Beginning of Year
 
Charges to
Costs and
Expenses (a)
 
Deductions to
Allowances for
Uncollectible
Accounts (b)
 Charges to
(Deductions from)
Other Accounts (c)
 
Balance at
End of Year
Year Ended December 31, 2018:          
Allowances for uncollectible accounts (d) $98
 19
 (19) (30) $68
Year Ended December 31, 2017:          
Allowances for uncollectible accounts and sales returns and allowances $119
 14
 (18) (17) $98
Year Ended December 31, 2016:                    
Allowances for uncollectible accounts and sales returns and allowances $119
 9
 (11) 2
 $119
 $119
 9
 (11) 2
 $119
Year Ended December 31, 2015:          
Allowances for uncollectible accounts and sales returns and allowances $105
 15
 (16) 15
 $119
Year Ended December 31, 2014:          
Allowances for uncollectible accounts and sales returns and allowances $112
 10
 (15) (2) $105
(a) Represents allowances for uncollectible accounts established through selling, general and administrative expenses.
(b) Represents actual write-offs of uncollectible accounts.
(c) Represents net change in allowances for sales returns, recorded as contra-revenue.
(d) Due to the adoption of FASB ASC Topic 606 effective January 1, 2018, the allowance for sales returns has been prospectively reclassified from Trade accounts receivable, net to Other current liabilities within the consolidated balance sheets and is not included in the ending balance for 2018 above. Prior period balances remain unchanged.


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