10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark one)
x	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

or
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from                                       to

Commission file number 001-34912

CELGENE CORPORATION

(Exact name of registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)	22-2711928 (I.R.S. Employer Identification No.)
86 Morris Avenue Summit, New Jersey (Address of principal executive offices)	07901 (Zip Code)

(908) 673-9000

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Name of each exchange on which registered
Common Stock, par value $.01 per share	NASDAQ Global Select Market
Contingent Value Rights	NASDAQ Global Market

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 x    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 x

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 x    No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, 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 shorter period that the registrant was required to submit and post such files). Yes x    No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of 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. x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer x	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o
		(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Act). Yes o    No x

The aggregate market value of voting stock held by non-affiliates of the registrant on June 30, 2015, the last business day of the registrant's most recently completed second quarter, was $91,555,862,650 based on the last reported sale price of the registrant's Common Stock on the NASDAQ Global Select Market on that date.

There were 781,664,535 shares of Common Stock outstanding as of February 5, 2016.

Documents Incorporated by Reference

The registrant intends to file a definitive proxy statement pursuant to Regulation 14A within 120 days of the end of the fiscal year ended December 31, 2015. The proxy statement is incorporated herein by reference into the following parts of the Form 10-K:

Part II, Item 5.(d)	Equity Compensation Plan Information.
Part III, Item 10.	Directors, Executive Officers and Corporate Governance.
Part III, Item 11.	Executive Compensation.
Part III, Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
Part III, Item 13.	Certain Relationships and Related Transactions, and Director Independence.
Part III, Item 14.	Principal Accountant Fees and Services.

CELGENE CORPORATION

ANNUAL REPORT ON FORM 10-K

TABLE OF CONTENTS

Item No.		Page
Part I
1.	Business	1
1A.	Risk Factors	17
1B.	Unresolved Staff Comments	29
2.	Properties	30
3.	Legal Proceedings	30
4.	Mine Safety Disclosures	30
Part II
5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	31
6.	Selected Financial Data	33
7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	34
7A.	Quantitative and Qualitative Disclosures About Market Risk	54
8.	Financial Statements and Supplementary Data	59
9.	Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	118
9A.	Controls and Procedures	118
9B.	Other Information	120
Part III
10.	Directors, Executive Officers and Corporate Governance	120
11.	Executive Compensation	120
12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	120
13.	Certain Relationships and Related Transactions, and Director Independence	120
14.	Principal Accountant Fees and Services	120
Part IV
15.	Exhibits, Financial Statement Schedules	121
	Signatures and Power of Attorney	126

PART I

ITEM 1.    BUSINESS

Celgene Corporation, together with its subsidiaries (collectively “we,” “our,”  “us,” “Celgene” or the “Company”), is an integrated global biopharmaceutical company engaged primarily in the discovery, development and commercialization of innovative therapies for the treatment of cancer and inflammatory diseases through next-generation solutions in protein homeostasis, immuno-oncology, epigenetics, immunology and neuro-inflammation. Celgene Corporation was incorporated in the State of Delaware in 1986.

Our primary commercial stage products include REVLIMID^®, POMALYST^®/IMNOVID^®, ABRAXANE^®,OTEZLA^®, VIDAZA^®, azacitidine for injection (generic version of VIDAZA^®),THALOMID^® (sold as THALOMID^® or Thalidomide Celgene^TM outside of the United States), and ISTODAX^®.In addition, we earn revenue through licensing arrangements.

We continue to invest substantially in research and development in support of multiple ongoing proprietary clinical development programs which support our existing products and pipeline of new drug candidates. Our clinical trial activity includes trials across the disease areas of hematology, oncology, and inflammation and immunology. REVLIMID^® is in several phase III trials covering a range of hematological malignancies that include multiple myeloma, lymphomas, chronic lymphocytic leukemia (CLL) and myelodysplastic syndromes (MDS). POMALYST^®/IMNOVID^® was approved in the United States and the European Union (EU) for indications in multiple myeloma based on phase II and phase III trial results, respectively, and an additional phase III trial is underway with POMALYST^®/IMNOVID^® in relapsed and refractory multiple myeloma. In solid tumors, ABRAXANE^® is currently in various stages of investigation for breast, pancreatic and non-small cell lung cancers. In inflammation and immunology, OTEZLA^® is being evaluated in phase III trials for Behçet's disease and expanded indications in psoriatic arthritis and plaque psoriasis. We also have a growing number of potential products in phase III trials across multiple diseases. In the inflammation and immunology therapeutic area, we have phase III trials underway for ozanimod in ulcerative colitis (UC) and relapsing multiple sclerosis (RMS) and for GED-0301 in Crohn’s disease. In hematology, phase III trials are underway for CC-486 in MDS and acute myeloid leukemia (AML), for AG-221 in AML, and for luspatercept in MDS.

On August 27, 2015, we acquired all of the outstanding common stock of Receptos, Inc. (Receptos) which resulted in Receptos becoming our wholly-owned subsidiary. Receptos' lead drug candidate, ozanimod, is a small molecule that modulates sphingosine 1-phosphate 1 and 5 receptors and it is in development for immune-inflammatory indications, including inflammatory bowel disease and RMS.

The acquisition of Receptos also included other pipeline and pre-clinical stage compounds. In clinical trial results, ozanimod demonstrated several areas of potential advantage over existing oral therapies for the treatment of UC and RMS, including its cardiac, hepatotoxicity and lymphocyte recovery profile. The phase III TRUE NORTH trial in UC is currently underway with data expected in 2018. The phase III RADIANCE and SUNBEAM RMS trials are ongoing and data are expected in the first half of 2017. See Note 2 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K for more information related to our acquisition of Receptos.

Beyond our phase III programs, we have access to a growing early-to-mid-stage pipeline of novel potential therapies to address significant unmet medical needs that consists of new drug candidates and cell therapies developed in-house, licensed from other companies or able to be optioned from collaboration partners. We believe that continued use of our primary commercial stage products, participation in research and development collaboration arrangements, depth of our product pipeline, regulatory approvals of new products and expanded use of existing products will provide the catalysts for future growth.

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The diseases that our primary commercial stage products are approved to treat are described below for the major markets of the United States, the European Union and Japan. Approvals in other international markets are indicated in the aggregate for the disease indication that most closely represents the majority of the other international approvals.

REVLIMID^® (lenalidomide): REVLIMID^® is an oral immunomodulatory drug marketed in the United States and many international markets for the treatment of patients with the following indications:

Disease	Geographic Approvals
Multiple myeloma (MM)
Multiple myeloma in combination with dexamethasone, in patients who have received at least one prior therapy	- United States - European Union - Japan - Other international markets
Multiple myeloma in combination with dexamethasone for newly diagnosed patients	- United States (Approved February 2015) - Japan (Approved December 2015)
Adult patients with previously untreated multiple myeloma who are not eligible for transplant	- European Union (Approved February 2015)
Myelodysplastic syndromes (MDS)
Transfusion-dependent anemia due to low- or intermediate-1-risk MDS associated with a deletion 5q abnormality with or without additional cytogenetic abnormalities	- United States - Other international markets
Transfusion-dependent anemia due to low- or intermediate-1-risk MDS in patients with isolated deletion 5q cytogenetic abnormality when other options are insufficient or inadequate	- European Union
MDS with a deletion 5q cytogenetic abnormality. The efficacy or safety of REVLIMID® for International Prognostic Scoring System (IPSS) intermediate-2 or high risk MDS has not been established.	- Japan
Mantle cell lymphoma (MCL) in patients whose disease has relapsed or progressed after two prior therapies, one of which included bortezomib	- United States

In January 2016, the European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) adopted a positive opinion for treatment with REVLIMID^® in adult patients with relapsed or refractory mantle cell lymphoma.

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ABRAXANE^® (paclitaxel albumin-bound particles for injectable suspension): ABRAXANE^® is a solvent-free chemotherapy product which was developed using our proprietary nab^® technology platform. This protein-bound chemotherapy agent combines paclitaxel with albumin. ABRAXANE^® is approved for the treatment of patients with the following indications:

Disease	Geographic Approvals
Breast Cancer
Metastatic breast cancer, after failure of combination chemotherapy for metastatic disease or relapse within six months of adjuvant chemotherapy. Prior therapy should have included an anthracycline unless clinically contraindicated.	- United States - Other international markets
Metastatic breast cancer in adult patients who have failed first-line treatment for metastatic disease for whom standard, anthracycline containing therapy is not indicated	- European Union
Breast cancer	- Japan
Non-Small Cell Lung Cancer (NSCLC)
Locally advanced or metastatic NSCLC, as first-line treatment in combination with carboplatin, in patients who are not candidates for curative surgery or radiation therapy	- United States - European Union (Approved March 2015) - Other international markets
NSCLC	- Japan
Pancreatic Cancer
Metastatic adenocarcinoma of the pancreas, a form of pancreatic cancer, as first line treatment in combination with gemcitabine	- United States - European Union - Other international markets
Unresectable pancreatic cancer	- Japan
Gastric cancer	- Japan

POMALYST^®/IMNOVID^®-(pomalidomide)¹: POMALYST^®/IMNOVID^® is a proprietary, distinct, small molecule that is administered orally and modulates the immune system and other biologically important targets. POMALYST^®/IMNOVID^® is approved for the treatment of patients with the following indications:

Disease	Geographic Approvals
Multiple myeloma, in combination with dexamethasone, for patients who have received at least two prior therapies, including lenalidomide and a proteasome inhibitor and have demonstrated disease progression on or within 60 days of completion of the last therapy	- United States
Relapsed and refractory multiple myeloma, in combination with dexamethasone, for adult patients who have received at least two prior therapies including both lenalidomide and bortezomib and have demonstrated disease progression on the last therapy	- European Union
Relapsed and refractory multiple myeloma for patients who have received REVLIMID or bortezomib	- Japan (Approved March 2015)

¹We received regulatory approval for pomalidomide under the trade name POMALYST^® in the United States and Japan and under the trade name IMNOVID^® in the European Union.

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OTEZLA^® (apremilast): OTEZLA^® is an oral small-molecule inhibitor of phosphodiesterase 4 (PDE4) specific for cyclic adenosine monophosphate (cAMP). PDE4 inhibition results in increased intracellular cAMP levels. OTEZLA^® is approved for the treatment of patients with the following indications:

Disease	Geographic Approvals
Psoriatic arthritis
Adult patients with active psoriatic arthritis	- United States
Adult patients with active psoriatic arthritis who have had an inadequate response or who have been intolerant to a prior DMARD therapy	- European Union (Approved January 2015)
Psoriasis
Patients with moderate to severe plaque psoriasis who are candidates for phototherapy or systemic therapy	- United States - Other international markets
Adult patients with moderate to severe chronic plaque psoriasis who failed to respond to or who have a contraindication to, or are intolerant to other systemic therapy including cyclosporine, methotrexate or psoralen and ultraviolet-A light	- European Union (Approved January 2015)

VIDAZA^® (azacitidine for injection): VIDAZA^® is a pyrimidine nucleoside analog that has been shown to reverse the effects of DNA hypermethylation and promote subsequent gene re-expression. VIDAZA^® is a Category 1 recommended treatment for patients with intermediate-2 and high-risk MDS, according to the National Comprehensive Cancer Network. The U.S. regulatory exclusivity for VIDAZA^® expired in May 2011. After the launch of a generic version of VIDAZA^® in the United States by a competitor in September 2013, we experienced a significant reduction in our U.S. sales of VIDAZA^®. In 2013, we contracted with Sandoz AG (Sandoz) to sell a generic version of VIDAZA^® in the United States, which we supply, and we recognize net product sales from our sales to Sandoz. Regulatory exclusivity for VIDAZA^® is expected to continue in Europe through 2019. VIDAZA^® is marketed in the United States and many international markets for the treatment of patients with the following indications:

Disease	Geographic Approvals
Myelodysplastic syndromes (MDS)
All French-American-British (FAB) subtypes	- United States
Intermediate-2 and high-risk MDS	- European Union - Other international markets
MDS	- Japan
Chronic myelomonocytic leukemia with 10% to 29% marrow blasts without myeloproliferative disorder	- European Union - Other international markets
Acute myeloid leukemia (AML) with 20% to 30% blasts and multi-lineage dysplasia	- European Union - Other international markets
Acute myeloid leukemia with >30% bone marrow blasts according to the WHO classification in patients aged 65 years or older who are not eligible for haematopoietic stem cell transplantation.	- European Union (Approved October 2015)

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THALOMID^® (thalidomide): THALOMID^®, sold as THALOMID^® or Thalidomide Celgene^TM outside of the United States, is administered orally for the treatment of patients with the following indications:

Disease	Geographic Approvals
Multiple myeloma
Newly diagnosed multiple myeloma, in combination with dexamethasone	- United States
Thalomid in combination with dexamethasone is indicated for induction therapy prior to high dose chemotherapy with autologous stem cell rescue, for the treatment of patients with untreated multiple myeloma	- Other international markets
Multiple myeloma after failure of standard therapies (relapsed or refractory)	- Other international markets
Thalidomide CelgeneTM in combination with melphalan and prednisone as a first line treatment for patients with untreated multiple myeloma who are aged sixty-five years of age or older or ineligible for high dose chemotherapy	- European Union - Other international markets
Erythema nodosum leprosum
Cutaneous manifestations of moderate to severe erythema nodosum leprosum (ENL), an inflammatory complication of leprosy	- United States - Other international markets
Maintenance therapy for prevention and suppression of the cutaneous manifestation of ENL recurrence	- United States - Other international markets

ISTODAX^® (romidepsin): ISTODAX^® is administered by intravenous infusion for the treatment of patients with the diseases as indicated below and has received orphan drug designation for the treatment of non-Hodgkin’s T-cell lymphomas, including CTCL and PTCL.

Disease	Geographic Approvals
Cutaneous T-cell lymphoma (CTCL) in patients who have received at least one prior systemic therapy	- United States - Other international markets
Peripheral T-cell lymphoma (PTCL) in patients who have received at least one prior therapy	- United States - Other international markets

REVLIMID^®, POMALYST^® and THALOMID^® are distributed in the United States primarily through contracted pharmacies under the REVLIMID^® Risk Evaluation and Mitigation Strategy (REMS), POMALYST REMS^TM and THALOMID REMS^TM programs, respectively. These are proprietary risk-management distribution programs tailored specifically to provide for the safe and appropriate distribution and use of REVLIMID^®, POMALYST^® and THALOMID^®.Internationally, REVLIMID^®, THALOMID^®/Thalidomide Celgene^TM and IMNOVID^® are distributed under mandatory risk-management distribution programs tailored to meet local authorities’ specifications to provide for the product’s safe and appropriate distribution and use. These programs may vary by country and, depending upon the country and the design of the risk-management program, the product may be sold through hospitals or retail pharmacies. VIDAZA^®, ABRAXANE^®, ISTODAX^® and OTEZLA^® are distributed through the more traditional pharmaceutical industry supply chain and are not subject to the same risk-management distribution programs as REVLIMID^®, POMALYST^®/IMNOVID^® and THALOMID^®/Thalidomide Celgene^TM.

PRECLINICAL AND CLINICAL-STAGE PIPELINE

Our preclinical and clinical-stage pipeline of new drug candidates and cell therapies is highlighted by multiple classes of both small molecule and biologic therapeutic agents designed to selectively regulate disease-associated genes and proteins. These product candidates are at various stages of preclinical and clinical development.

Immune-Inflammatory Diseases:  OTEZLA^® (apremilast) a novel PDE4 inhibitor, is being studied in clinical trials in ankylosing spondylitis, Behçet's disease, atopic dermatitis, and ulcerative colitis, and is approved in psoriasis and psoriatic arthritis.

Differentiated oral therapies are advancing through mid to late stage trials in inflammatory diseases, including GED-0301, a potential first-in-class smad7 anti-sense treatment, with a phase III program in Crohn’s Disease (CD) underway, and a phase II trial in UC initiated. In addition, ozanimod is a potential best-in-class S1P receptor modulator, with a phase III trial in UC underway, and a phase II trial in CD initiated.

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Other oral therapies include, for rheumatology, OTEZLA^®, CC-220, and CC-292; for Dermatology, OTEZLA^®; and for neuro-inflammation and MS, ozanimod and ABX-1431.

Sotatercept (ACE-011) and luspatercept (ACE-536): We have collaborated with Acceleron Pharma, Inc. (Acceleron) to develop sotatercept and luspatercept. A phase II trial is in progress to evaluate the use of sotatercept in the treatment of patients with chronic kidney disease and phase III and phase II trials, respectively are evaluating luspatercept in the treatment of patients with beta-thalassemia and MDS.

Epigenetics: The current insights into molecular regulation of genetic information (Epigenetics) has the potential to transform human diseases. We currently market two epigenetic modifiers, VIDAZA^® and ISTODAX^®. We have two phase III trials of CC-486 currently enrolling to evaluate CC-486 in the treatment of MDS and AML and two on-going phase II trials of CC-486 in solid tumors. We acquired the IDH2 inhibitor (AG-221/CC-90007) from Agios Pharmaceuticals, Inc. (Agios) and are currently evaluating its activity in a phase III trial in AML. We are also evaluating AG-120 (IDH1 inhibitor) and AG-881 (IDH1 and IDH2 inhibitor) in AML and solid tumors, in partnership with Agios.

Protein Homeostasis: CC-122 (a PPM^TM Pleiotropic Pathway Modifier) and CC-220 represent novel compounds that are in phase I and phase II clinical trials, both as single agents and in combination, for hematological and solid tumor cancers and inflammation and immunology diseases. They have been differentiated from previous compounds (such as thalidomide, lenalidomide and pomalidomide) and have been developed based on our scientific understanding of Cereblon-mediated protein homeostasis.

Immuno-Oncology: The strategic collaboration with Astra Zeneca/Medimmune has provided us with the opportunity to evaluate durvalumab, an anti-PDL-1 antibody, in hematological cancers in combination with REVLIMID^®, POMALYST^®, VIDAZA^® and CC-486. Additional collaborations with Juno Therapeutics, Inc. and bluebird bio, Inc. allow us to explore the potential of engineered CAR T-cell therapies in highly refractory hematological cancer patients. Our anti-CD47 antibody targeting macrophage activity, CC-90002, is currently in phase I trials, being evaluated for the treatment of solid tumor cancers, MM and AML. CC-90003, a covalent ERK inhibitor, is currently in a phase I trial targeting BRAF and RAS-mutated solid tumors.

Cellular Therapies: At CCT we are conducting research with stem cells derived from the human placenta as well as from the umbilical cord. CCT is our research and development division dedicated to fulfilling the promise of cellular technologies by developing products and therapies to significantly benefit patients. Our goal is to develop proprietary cell therapy products for the treatment of unmet medical needs.

Stem cell based therapies offer the potential to provide disease-modifying outcomes for serious diseases that lack adequate therapy. We have developed proprietary technology for collecting, processing and storing placental stem cells with potentially broad therapeutic applications in cancer, auto-immune diseases, and other inflammatory diseases.

Our placental-derived, culture-expanded cellular therapy, PDA-002 (IM/SC injectable formulation), is in a phase II trial in patients with diabetic foot ulcers with and without peripheral artery disease and in a phase II trial for diabetic peripheral neuropathy. Our umbilical cord blood-derived, Natural Killer cell product PNK-007 is nearing phase I trials for the treatment of hematological malignancies, as an allogeneic cell therapy. We also continue research to define the potential of placental-derived stem cells and to characterize other placental-derived products and other cell therapies.

PRODUCT DEVELOPMENT

We devote significant resources to research and development programs in an effort to discover and develop potential future product candidates. Research and development expenses amounted to $3.697 billion in 2015, $2.431 billion in 2014, and $2.226 billion in 2013. The product candidates in our pipeline are at various stages of preclinical and clinical development. The path to regulatory approval ordinarily includes three phases of clinical trials in which we collect data to support an application to regulatory authorities to allow us to market a product for treatment of a specified disease. There are many difficulties and uncertainties inherent in research and development of new products, resulting in a high rate of failure. To bring a drug from the discovery phase to regulatory approval, and ultimately to market, takes many years and significant cost. Failure can occur at any point in the process, including after the product is approved, based on post-marketing events or developments. New product candidates that appear promising in development may fail to reach the market or may have only limited commercial success because of efficacy or safety concerns, inability to obtain necessary regulatory approvals, limited scope of approved uses, reimbursement challenges, difficulty or excessive costs of manufacture, alternative therapies or infringement of the patents or intellectual property rights of others. Uncertainties in the U.S. Food and Drug Administration (FDA) approval process and the approval processes in other countries can result in delays in product launches and lost market opportunities. Consequently, it is very difficult to predict which products will ultimately be submitted for approval, which will obtain approval and which will be commercially viable and generate profits. Successful results in preclinical or clinical studies may not be an accurate predictor of the ultimate safety or effectiveness of a drug or product candidate.

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Phase I Clinical Trials

Phase I clinical trials begin when regulatory agencies allow initiation of clinical investigation of a new drug or product candidate and usually involve up to 80 healthy volunteers or subjects. These trials study a drug's safety profile, and may include a preliminary determination of a drug or product candidate's safe dosage range. The phase I clinical trial also determines how a drug is absorbed, distributed, metabolized and excreted by the body, and therefore the potential duration of its action. Phase I clinical trials generally take from one to three years to complete.

Phase II Clinical Trials

Phase II clinical trials are conducted on a limited number of subjects with the targeted disease. An initial evaluation of the drug's effectiveness on subjects is performed and additional information on the drug's safety and dosage range is obtained. Phase II clinical trials normally include up to several hundred subjects and may take as many as two to three years to complete.

Phase III Clinical Trials

Phase III clinical trials are typically controlled multi-center trials that involve a larger target patient population that normally consists of several hundred to several thousand subjects to ensure that study results are statistically significant. During phase III clinical trials, physicians monitor subjects to determine efficacy and to gather further information on safety. These trials are generally global in nature and are designed to generate the clinical data necessary to submit an application for marketing approval to regulatory agencies. Phase III clinical trial testing varies by disease state, but can often last from two to seven years.

Regulatory Review

If a product candidate successfully completes clinical trials and trial data is submitted to governmental regulators, such as the FDA in the United States or the European Commission (EC) in the European Union, the time to final marketing approval can vary from six months (for a U.S. filing that is designated for priority review by the FDA) to several years, depending on a number of variables, such as the disease state, the strength and complexity of the data presented, the novelty of the target or compound, risk-management approval and whether multiple rounds of review are required for the regulatory agency to evaluate the submission. There is no guarantee that a potential treatment will receive marketing approval, or that decisions on marketing approvals or treatment indications will be consistent across geographic areas.

The current stage of development of our commercial stage products and new drug candidates in various areas of research are outlined in the following table:

Area of Research		Status	Entered Current Status
Multiple Myeloma (MM)
REVLIMID®	Relapsed/refractory	Post-approval research1	2006
	Newly diagnosed	Post-approval research1	Q1 2015
	Maintenance	Phase III	2004
POMALYST®/IMNOVID®	Relapsed/refractory	Post-approval research1	2013
THALOMID®/Thalidomide CelgeneTM	Newly diagnosed	Post-approval research1	2006
PD-L1 Inhibitor: durvalumab2	MM	Phase I	Q4 2015
Anti-CD47 Antibody: CC-90002	MM	Phase I	Q1 2015
PPMTM Pleiotropic Pathway Modifier: CC122	MM	Phase I	Q4 2015
Myelodysplastic Syndromes (MDS)
VIDAZA®	.	Post-approval research1	2004
REVLIMID®	Deletion 5q	Post-approval research1	2005
	Non-deletion 5q	Phase III	2010
CC-486	Lower-risk	Phase III	2013
	Post hypomethylating agent (HMA) failure	Phase II	Q3 2015

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luspatercept (ACE-536)3	MDS	Phase II	2013
PD-L1 Inhibitor: durvalumab2	MDS	Phase II	Q2 2015
Area of Research		Status	Entered Current Status
Acute Myeloid Leukemia (AML)
VIDAZA®	AML (20%-30% blasts) (EU)	Post-approval research1	2008
	AML (>30% blasts) (EU)	Approved	Q4 2015
CC-486	Post-induction AML maintenance	Phase III	2013
IDH2 Inhibitor: AG-221 (CC-90007)4	AML	Phase III	Q1 2016
IDH1 Inhibitor: AG-1204	AML	Phase II	Q2 2015
DOT 1L Inhibitor: EPZ-56765	AML	Phase I	2012
PAN-IDH Inhibitor: AG-8814	AML	Phase I	Q3 2015
PD-L1 Inhibitor: durvalumab2	AML	Phase II	Q4 2015
Lymphoma
REVLIMID®	Mantle cell lymphoma: Relapsed/refractory (US)	Post-approval research1	2013
	Mantle cell lymphoma: Relapsed/refractory (EU)	Regulatory filing and approval	2014
	Diffuse large B-cell: Maintenance	Phase III	2009
	Diffuse large B-cell (ABC-subtype): First line	Phase III	Q1 2015
	Relapsed/refractory indolent lymphoma	Phase III	2013
	Follicular lymphoma: First-line	Phase III	2011
	Adult T-cell leukemia-lymphoma (Japan)	Phase II	2012
ISTODAX®	Cutaneous T-cell lymphoma (US)6	Post-approval research1	2009
	Peripheral T-cell lymphoma: Relapsed/refractory (US)6	Post-approval research1	2011
	Peripheral T-cell lymphoma: Relapsed/refractory (Japan)	Phase II	2013
	Peripheral T-cell lymphoma: First-line	Phase III	2013
PPMTM Pleiotropic Pathway Modifier: CC-122	Diffuse large B-cell lymphoma	Phase Ib	2014
	Relapsed/refractory indolent lymphoma	Phase I	2014
CC-486	Lymphoma	Phase I	Q3 2015
PD-L1 Inhibitor: durvalumab2	Lymphoma	Phase I	Q1 2016
Anti-CD47 Antibody: CC-90002	Lymphoma	Phase I	Q1 2016
Chronic Lymphocytic Leukemia (CLL)
REVLIMID®	Maintenance: Second-line	Phase III	2009
PPMTM Pleiotropic Pathway Modifier: CC-122	CLL	Phase I	Q1 2015
PD-L1 Inhibitor: durvalumab2	CLL	Phase I	Q4 2015
Beta Thalassemia
luspatercept (ACE-536)3	Beta-thalassemia	Phase III	Q4 2015

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Area of Research		Status	Entered Current Status
Solid Tumors
ABRAXANE®	Breast: Metastatic	Post-approval research1	2005
	Breast: Metastatic (first-line, triple negative)	Phase II/III	2013
	Non-small cell lung: Advanced (first-line)	Post-approval research1	2012
	Pancreatic: Advanced (first-line)	Post-approval research1	2013
	Pancreatic: Adjuvant	Phase III	2014
	Gastric: Metastatic (Japan)7	Regulatory filing and approval	2013
CC-486	Breast: Metastatic	Phase II	Q1 2015
	Non-small cell lung: Advanced	Phase II	Q3 2015
IDH1 Inhibitor: AG-1204	Solid tumors	Phase I	Q1 2016
IDH2 Inhibitor: AG-221 (CC-90007)4	Solid tumors	Phase I	Q4 2015
PPMTM Pleiotropic Pathway Modifier: CC-122	Glioblastoma multiforme	Phase I	2013
	Hepatocellular carcinoma	Phase I	Q1 2015
ERK Inhibitor: CC-90003	Solid tumors	Phase I	Q1 2015
Anti-CD47 Antibody: CC-90002	Solid tumors	Phase I	Q1 2015
PAN-IDH Inhibitor: AG-8814	Solid tumors	Phase I	Q3 2015
Anti-Inflammatory
OTEZLA® (apremilast)	Psoriatic arthritis	Post-approval research1	2014
	Psoriasis	Post-approval research1	2014
	Psoriasis (Japan)	Phase III	2013
	Ankylosing spondylitis	Phase III	2012
	Behçet's disease	Phase III	2014
	Atopic dermatitis	Phase II	2014
	Ulcerative colitis	Phase II	2014
GED-0301	Crohn's disease	Phase III	Q3 2015
	Ulcerative colitis	Phase II	Q3 2015
ozanimod	Relapsing multiple sclerosis	Phase III	2013
	Ulcerative colitis	Phase III	Q3 2015
	Crohn's disease	Phase II	Q4 2015
RPC-40468	Eosinophilic esophagitis	Phase II	2014
sotatercept (ACE-011)3	Chronic kidney disease	Phase II	2013
CC-220	Systemic lupus erythematosus (SLE)	Phase II	2014
CC-90001	Fibrosis	Phase I	2014

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Area of Research		Status	Entered Current Status
Cellular Therapies
PDA-002	Peripheral artery disease/Diabetic foot ulcers	Phase II	2014

¹ Includes Celgene-sponsored and Celgene-supported studies.

² In collaboration with MedImmune Limited, a wholly owned subsidiary of AstraZeneca PLC.

³ In collaboration with Acceleron Pharma, Inc.

⁴ In collaboration with Agios Pharmaceuticals, Inc.

⁵ In collaboration with Epizyme, Inc.

⁶ Regulatory approval based on pivotal phase II data.

⁷ Trial conducted by licensee partner, Taiho Pharmaceuticals Co. Ltd.

⁸ Under co-development option with AbbVie, Inc.

PATENTS AND PROPRIETARY TECHNOLOGY

We consider intellectual property protection to be critical to our operations. For many of our products, in addition to compound (e.g., drug substance) and composition (e.g., drug product) patents, we hold polymorph, formulation, methods of treatment or use, delivery mechanism and methods of manufacture patents, as well as manufacturing trade secrets, that may extend exclusivity beyond the expiration of the compound patent or composition patent.

Key patent expirations and exclusivities:

The following table shows the expected expiration dates in the United States and Europe of the last-to-expire period of exclusivity (primary patent or regulatory approval) related to our primary marketed drug products. In some instances, there are later-expiring patents relating to particular forms or compositions, methods of manufacturing, or use of the drug in the treatment of particular diseases or conditions. However, such additional patents may not protect our drug products from generic competition after the expiration of the primary patent.

	U.S.1	Europe
REVLIMID® brand drug	20272	20243
(U.S. and European use patents)
THALOMID® brand drug	2023	2019
(U.S. formulation/ European use patents)
VIDAZA® brand drug	20114	2019
(U.S. use patent and EMA regulatory exclusivities only)
ABRAXANE® brand drug	2026	2022
(U.S. use patent and European use/formulation patents)
ISTODAX® brand drug	20215	6
(U.S. drug substance patents)
POMALYST®/IMNOVID® brand drug	20247	20238
(U.S. drug substance/use patent)
FOCALIN® brand drug	2015	N/A
(U.S. use patents)
FOCALIN XR® brand drug	2015	2018
(U.S. use patent/European formulation patent)
(European Patent Office (EPO) drug product patent)
OTEZLA® brand drug	20249	20283
(U.S./European drug substance patent)

_____________________

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¹  The patents covering these drugs include patents listed in the U.S. Orange Book. The date provided reflects the last-to-expire key patent as listed in the U.S. Orange Book, which may not be the last date on which all relevant patents (e.g., polymorph and manufacturing patents) expire.

²  In December 2015, we announced the settlement of litigations with Natco Pharma Ltd. and its partners and affiliates, relating to certain patents for REVLIMID^®. As part of the settlement, we agreed to provide Natco with a license to Celgene’s patents required to manufacture and sell an unlimited quantity of generic lenalidomide in the U.S. beginning on January 31, 2026. In addition, Natco will receive a volume-limited license to sell generic lenalidomide in the U.S. commencing in March 2022, which is expected to be a mid-single-digit percentage of the total lenalidomide capsules dispensed in the U.S. during the first year of entry. The volume limitation is expected to increase gradually each twelve months until March 2025, and is not expected to exceed one-third of the total lenalidomide capsules dispensed in the U.S. in the final year of the volume-limited license. Natco’s ability to market generic lenalidomide in the U.S. will be contingent on its obtaining approval of an Abbreviated New Drug Application. See Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K for more information.

³   Subject of ongoing EPO opposition proceedings. See Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K for more information.

⁴  We contracted with Sandoz to sell azacitidine for injection, which they launched after the introduction of a generic version of VIDAZA^® in the United States by a competitor in September 2013.

⁵  See Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K for more information relating to the settlement of certain patent claims.

⁶  Based on ten years of regulatory exclusivity upon approval of an application for an orphan indication.

⁷  Application for Patent Term Extension pending, receipt of which would extend exclusivity through 2025.

⁸  Based on ten years regulatory exclusivity. A patent application is pending, receipt of which would likely extend exclusivity beyond 2023.

⁹  Application for Patent Term Extension pending, receipt of which would extend exclusivity through 2028.

The term of individual patents and patent applications will depend upon the legal term of the patents in the countries in which they are obtained. In the United States, the patent term is 20 years from the date of filing of the patent application although term extensions are available. We may obtain patents for certain products many years before marketing approval is obtained for those products. Because of the limited life of patents, which ordinarily commences prior to the commercial sale of the related product, the commercial value of the patent may be limited. However, we may be able to obtain patent term extensions upon marketing approval. For example, supplementary protection certificates (SPCs) on some of our products have been granted in a number of European countries, compensating in part for delays in obtaining marketing approval. Also, under the Hatch-Waxman Act, the term of a patent that covers an FDA-approved drug may also be eligible for patent term extension (for up to five years, but not beyond a total of 14 years from the date of product approval) as compensation for patent term lost during the FDA regulatory review process. When possible, depending upon the length of clinical trials and other factors involved in the filing of a new drug application (NDA) with the FDA, we expect to apply for patent term extensions for patents covering our drug products and their use in treating various diseases.

In most cases, our drugs are also covered in foreign countries by patents and patent applications that correspond to certain of those listed in the U.S. Orange Book. For example, patents related to the active pharmaceutical ingredient, uses and pharmaceutical compositions for most of our drugs have been granted in Europe. Although certain of the patents granted by the regulatory authorities of the European Union may expire at specific dates, patents granted in certain European countries, such as Spain, France, Italy, Germany and the United Kingdom, will extend beyond such European Union patent expiration date due to the SPCs granted in these countries for many of our drugs. The table above may also reflect patents in Europe that relate to certain polymorphic forms of the active pharmaceutical ingredient of our drugs.

Patent term extensions have been granted in other markets for certain of our patents related to REVLIMID^®. Patent term extensions for certain of our patents related to lenalidomide have been granted in Europe, Australia, Korea, Japan and Russia. Further, patent term extensions for certain of our patents related to ABRAXANE^® have been secured and/or are actively being sought in Europe, Australia, Japan, Russia and Korea. We are also considering alternative exclusivity strategies, mostly through international treaties, in a variety of countries throughout Latin America.

The existence of issued patents does not guarantee our right to practice the patented technology or commercialize the patented product. Third parties may have or obtain rights to patents which could be used to prevent or attempt to prevent us from commercializing the patented product candidates. Patents relating to pharmaceutical, biopharmaceutical and biotechnology products, compounds and processes, such as those that cover our existing compounds, products and processes and those that we will likely file in the future, do not always provide complete or adequate protection. Future litigation or re-examination proceedings (including oppositions and invalidity proceedings such as interparty reviews) regarding the enforcement or validity of our existing patents or any future patents could invalidate such patents or substantially reduce their protection.

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Our patents are subject to challenge by generic drug companies and others for a variety of reasons. For more information regarding challenges to certain of our patents, see Item 1A. "Risk Factors” and Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

As of December 31, 2015, we owned or had exclusively licensed 644 issued U.S. patents and 596 additional pending U.S. patent applications. We have a policy to seek broad global patent protection for our inventions and have foreign patent rights corresponding to most of our U.S. patents.

Trade secret strategies and intellectual property rights in our brand names, logos and trademarks are also important to our business. We maintain both registered and common law trademarks. Common law trademark protection typically continues where and for as long as the mark is used. Registered trademarks continue in each country for as long as the trademark is registered.

GOVERNMENTAL REGULATION

General:  Regulation by governmental authorities in the United States and other countries is a significant factor in the manufacture and marketing of pharmaceuticals and in our ongoing research and development activities. Our therapeutic products require regulatory approval by governmental agencies. Human therapeutic products are subject to rigorous preclinical testing and clinical trials and other pre-marketing and post-marketing approval requirements of the FDA and regulatory authorities in other countries. In the United States, various federal and, in some cases, state statutes and regulations also govern, or impact the manufacturing, testing for safety and effectiveness, labeling, storage, record-keeping and marketing of such products. The lengthy process of seeking required approvals and the continuing need for compliance with applicable statutes and regulations, require the expenditure of substantial resources. Regulatory approval, if and when obtained, may be limited in scope which may significantly limit the uses for which a product may be promoted. Further, approved drugs, as well as their manufacturers, are subject to ongoing post-marketing review, inspection and discovery of previously unknown problems with such products or the manufacturing or quality control procedures used in their production, which may result in restrictions on their manufacture, sale or use or in their withdrawal from the market. Any failure or delay by us, our suppliers of manufactured drug product, collaborators or licensees, in obtaining regulatory approvals could adversely affect the marketing of our products and our ability to receive product revenue, license revenue or profit sharing payments. For more information, see Item 1A. “Risk Factors.”

Clinical Development:  Before a product may be administered to human subjects, it must undergo preclinical testing. Preclinical tests include laboratory evaluation of a product candidate's chemistry and biological activities and animal studies to assess potential safety and efficacy. The results of these studies must be submitted to the FDA as part of an Investigational New Drug (IND) application which must be reviewed by the FDA primarily for safety considerations before clinical trials in humans can begin.

Typically, clinical trials in humans involve a three-phase process as previously described under “- Product Development.”

In some cases, further studies beyond the three-phase clinical trial process described above are required as a condition for an NDA or biologics license application (BLA) approval. The FDA requires monitoring of all aspects of clinical trials and reports of all adverse events must be made to the FDA. The FDA may also require the conduct of pediatric studies for the drug and indication either before or after submission of an NDA.

FDA Review and Approval:  The results of the preclinical testing and clinical trials are submitted to the FDA as part of an NDA or BLA for evaluation to determine if there is substantial evidence that the product is sufficiently safe and effective to warrant approval. In responding to an NDA or BLA, the FDA may grant marketing approval, deny approval, or request additional information, including data from new clinical trials.

Expedited Programs for Serious Conditions:  The FDA has developed four distinct approaches to make new drugs available as rapidly as possible in cases where there is no available treatment or there are advantages over existing treatments.

The FDA may grant “accelerated approval” to products that have been studied for their safety and effectiveness in treating serious or life-threatening illnesses and that provide meaningful therapeutic benefit to patients over existing treatments. For accelerated approval, the product must have an effect on a surrogate endpoint or an intermediate clinical endpoint that is considered reasonably likely to predict the clinical benefit of a drug, such as an effect on irreversible morbidity and mortality. When approval is based on surrogate endpoints or clinical endpoints other than survival or morbidity, the sponsor will be required to conduct additional post-approval clinical studies to verify and describe clinical benefit. These studies are known as "confirmatory trials." Approval of a drug may be withdrawn or the labeled indication of the drug changed if these trials fail to verify clinical benefit or do not demonstrate sufficient clinical benefit to justify the risks associated with the drug.

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The FDA may grant “fast track” status to products that treat serious diseases or conditions and demonstrate the potential to address an unmet medical need. Fast track is a process designed to facilitate the development and expedite the review of such products by providing, among other things, more frequent meetings with the FDA to discuss the product's development plan, more frequent written correspondence from the FDA about trial design, eligibility for accelerated approval if relevant criteria are met, and rolling review, which allows submission of individually completed sections of an NDA or BLA for FDA review before the entire submission is completed. Fast track status does not ensure that a product will be developed more quickly or receive FDA approval.

“Breakthrough Therapy” designation is a process designed to expedite the development and review of drugs that are intended to treat a serious condition and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over available therapy on a clinically significant endpoint. For drugs and biologics that have been designated as Breakthrough Therapies, robust FDA-sponsor interaction and communication can help to identify the most efficient and expeditious path for clinical development while minimizing the number of patients placed in ineffective control regimens.

The FDA may grant “priority review” status to products that, if approved, would provide significant improvement in the safety or effectiveness of the treatment, diagnosis, or prevention of serious conditions. Priority review is intended to reduce the time it takes for the FDA to review an NDA or BLA, with the goal to take action on the application within six months, compared to ten months for a standard review.

Orphan Drug Act: Under the United States Orphan Drug Act, a sponsor may request that the FDA designate a drug intended to treat a “rare disease or condition” as an “orphan drug.” A “rare disease or condition” is one which affects less than 200,000 people in the United States, or which affects more than 200,000 people, but for which the cost of developing and making available the product is not expected to be recovered from sales of the product in the United States. Upon the approval of the first NDA or BLA for a drug designated as an orphan drug for a specified indication, the sponsor of that NDA or BLA is entitled to seven years of exclusive marketing rights in the United States unless the sponsor cannot assure the availability of sufficient quantities to meet the needs of persons with the disease. However, orphan drug status is particular to the approved indication and does not prevent another company from seeking approval of an off-patent drug that has other labeled indications that are not under orphan or other exclusivities. Orphan drugs may also be eligible for federal income tax credits for costs associated with the drugs' development. In order to increase the development and marketing of drugs for rare disorders, regulatory bodies outside the United States have enacted regulations similar to the Orphan Drug Act.

Review and Approval Outside of the United States:  Approval procedures must be undertaken in virtually every other country comprising the market for our products. The approval procedure and the time required for approval vary from country to country and may involve additional testing. In certain countries such as the EU countries, Switzerland, Canada and Australia, regulatory requirements and approval processes are similar to those in the United States, where approval decisions by regulators are based on the regulators’ review of the results of clinical trials performed for specific indications. Other countries may have a less comprehensive review process in terms of data requirements and may rely on prior marketing approval from a foreign regulatory authority in other countries such as the United States or the EU.

Manufacturing Quality Control:  Among the conditions for NDA or BLA approval is the requirement that the prospective manufacturer’s quality control and manufacturing procedures continually conform with the FDA’s current Good Manufacturing Practice (cGMP) regulations (which are regulations established by the FDA governing the manufacture, processing, packing, storage and testing of drugs and biologics intended for human use). In complying with cGMP, manufacturers must devote substantial time, money and effort in the areas of production, quality control and quality assurance to maintain compliance. Material changes in manufacturing equipment, location or process, may result in additional regulatory review and approval. The FDA, the EC and other regulatory agencies conduct periodic visits to inspect equipment, facilities, and processes following the initial approval of a product. If a manufacturing facility is not in substantial compliance with the applicable regulations and requirements imposed when the product was approved, regulatory enforcement action may be taken, which may include a warning letter or an injunction against shipment of products from the facility and/or recall of products previously shipped.

Post-approval Review and Enforcement:  Regulatory authorities closely review and regulate the marketing and promotion of drug and biologic products. In most countries, regulatory approval is granted for a specified indication and is required before marketing or promoting a product for that indication. Regulatory authorities may take enforcement action against a company for promoting unapproved uses of a product ("off-label promotion") or for other violations of advertising and labeling laws and regulations.

When an NDA or BLA is approved, the NDA or BLA holder must, among other things, (a) employ a system for obtaining reports of adverse events and side effects associated with the drug and make appropriate submissions to the FDA and (b) timely advise the FDA if any marketed product fails to adhere to specifications established by the NDA or BLA. If the FDA concludes that a drug previously shown to be effective can be safely used only if distribution or use is restricted, the FDA will require post-marketing restrictions as necessary to assure safe use. The sponsor may be required to establish systems to assure use of the

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product under safe conditions. The FDA may require the drug sponsor to implement programs similar to our REMS^TM programs to ensure that benefits of a drug outweigh risks and that safety protocols are adhered to.

In addition, a sponsor of a drug product has an ongoing obligation to update product labels with new information and to report to regulatory authorities concerning assessment of serious risks associated with the drug. Following assessment of these reports, regulatory authorities can require product label updates to reflect new safety data or warnings. If the FDA or other regulatory authorities become aware of new safety information, they can also require us to conduct studies or clinical trials to assess the potential for a serious risk. The FDA and other regulatory authorities can also impose marketing restrictions, including the suspension of marketing or complete withdrawal of a product from the market.

The FDA may issue publicly available warning letters and non-compliance letters, which may require corrective actions, including modification of advertising or other corrective communications to consumers or healthcare professionals.

Failure to comply with applicable FDA or other regulatory agency requirements can result in enforcement actions, such as license revocation or suspension; orders for retention, recall, seizure or destruction of product; cessation of manufacturing; injunctions; inspection warrants; search warrants; civil penalties, including fines based on disgorgement; restitution; and criminal prosecution.

Other Regulations: We are also subject to various federal and state laws, as well as foreign laws, pertaining to healthcare “fraud and abuse,” including anti-kickback laws and false claims laws. Anti-kickback laws make it illegal to solicit, offer, receive or pay any remuneration in exchange for or to induce the referral of business, including the purchase or prescription of a particular drug that is reimbursed by a state or federal program. False claims laws generally prohibit knowingly and willingly presenting, or causing to be presented for payment to third-party payers (including Medicare and Medicaid) any claims for reimbursed drugs or services that are false or fraudulent, claims for items or services not provided as claimed or claims for medically unnecessary items or services. Our activities related to the sale and marketing of our products may be subject to scrutiny under these laws. Violations of fraud and abuse laws may be punishable by criminal and/or civil sanctions, including fines and civil monetary penalties, as well as the possibility of exclusion from federal healthcare programs (including Medicare and Medicaid).

We are also subject to regulation under the Occupational Safety and Health Act, the Toxic Substances Control Act, the Resource Conservation and Recovery Act and other federal, state and local laws, rules and regulations. Our research and development activities may involve the controlled use of hazardous materials, chemicals, biological materials and various radioactive compounds. We believe our procedures comply with the standards prescribed by federal, state or local laws, rules and regulations; however, the risk of injury or accidental contamination cannot be completely eliminated.

Additionally, the U.S. Foreign Corrupt Practices Act (FCPA) prohibits U.S. corporations and their representatives from offering, promising, authorizing or making payments or providing anything of value to any foreign government official, government staff member, political party or political candidate, with corrupt intent for the purpose of obtaining or retaining an improper business advantage. The scope of the FCPA includes interactions with certain healthcare professionals in many countries. Other countries have enacted similar anti-corruption laws and regulations to which our activities are subject.

COMPETITION

Our current products and products under development face competition from other innovative drugs and, in some cases, generic drugs. The relative speed with which we develop new products, complete clinical trials, obtain regulatory approvals, receive pricing and reimbursement approvals, and finalize manufacturing and distribution arrangements, and market our products are critical factors in gaining a competitive advantage. Competition among approved products depends, among other things, on product efficacy, safety, convenience, reliability, availability, price, third-party reimbursement, sales and promotional activities, product liability issues and patent and non-patent exclusivity. For additional information, see Item 1A. "Risk Factors.”

SIGNIFICANT ALLIANCES

We have entered into a variety of alliances in the ordinary course of our business. Although we do not consider any individual alliance to be material, a brief description of certain of the more notable alliances are identified in Note 17 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

MANUFACTURING

We own and operate a manufacturing facility in Zofingen, Switzerland which produces the active pharmaceutical ingredient (API) for REVLIMID^® and THALOMID^® and have contracted with third-party contract manufacturers to provide backup API manufacturing services for these products. Manufacturing services for REVLIMID^® and THALOMID^®, which consist of

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formulation, encapsulation, packaging, warehousing and distribution, are performed at our drug product manufacturing facility in Boudry, Switzerland. We have contracted with a number of third-party drug product manufacturing service providers and packaging service providers to provide backup manufacturing and packaging services. All of our facilities are approved by the regulatory authorities for the geographies that they serve and we require that our contract manufacturers and other third-party service providers are similarly approved.

The API for ABRAXANE^® is generally available from two sources and is normally available in quantities adequate to meet our needs. Manufacturing services for ABRAXANE^® are performed at our manufacturing facility in Arizona and by a third party contract manufacturing facility.

The API for POMALYST^®/IMNOVID^® is supplied from two sources with primary manufacturing services being performed at our Boudry, Switzerland manufacturing facility. We have contracted with a number of third-party drug product manufacturing service providers and packaging service providers to provide backup manufacturing and packaging services for this product.

The API for VIDAZA^® and azacitidine for injection (generic version of VIDAZA^®) is supplied by two suppliers. Manufacturing and packaging services are provided by a number of third-party service providers.

The API for OTEZLA^® is supplied by two suppliers with primary API production being performed at our Zofingen, Switzerland facility. Manufacturing services are performed at our Boudry, Switzerland facility and at a contract manufacturing site. Packaging services are provided by a number of third-party service providers.

The API for ISTODAX^® and manufacturing services are supplied by a single-source. Packaging services are provided by a number of third-party service providers.

Our Warren, New Jersey facility is FDA registered for production of PDA-002, which is a culture-expanded placenta-derived stem cell product, under cGMP to supply clinical studies. This is a multi-purpose facility capable of supporting other products.

Failure to comply with applicable regulatory agency requirements can result in enforcement actions, such as license revocation or suspension; orders for retention, recall, seizure or destruction of product; cessation of manufacturing; injunctions; inspection warrants; search warrants; civil penalties; restitution; and criminal prosecution.

INTERNATIONAL OPERATIONS

We have significant operations outside the United States conducted both through our subsidiaries and through distributors. For a geographic breakdown of total revenues see Note 19 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K and for further discussion of our total revenues by geographic area see Item 7. "Management’s Discussion and Analysis of Financial Condition and Results of Operations—Results of Operations."

Our international headquarters and a drug product manufacturing facility which performs formulation, encapsulation, packaging, warehousing and distribution are located in Boudry, Switzerland.

Our international operations are subject to risks associated with operating on an international basis, including currency fluctuations, price and exchange controls and other restrictive governmental actions. Our international operations are also subject to government-imposed constraints, including laws on pricing, reimbursement and patient access to our products. Depending on the direction of change relative to the U.S. dollar, foreign currency values can increase or decrease the reported dollar value of our net assets and results of operations. While we cannot predict with certainty future changes in foreign exchange rates or the effect they will have, we attempt to mitigate their impact through operational means and by using foreign currency derivative instruments. For more information, see Item 7A. "Quantitative and Qualitative Disclosures About Market Risk."

SALES AND COMMERCIALIZATION

We promote our brands globally through our hematology, oncology, and inflammation and immunology commercial organizations which support our currently marketed brands and prepare for the launches of new products, as well as new indications for existing products. For OTEZLA^®, we also provide information about the appropriate use of our products to consumers in the U.S. through direct-to-consumer print and television advertising. We have a team of dedicated market access professionals to help physicians, patients and payers understand the value our products deliver. Given our goal to ensure that patients who might benefit from our therapies have the opportunity to do so and given the complex reimbursement environment in the United States, we offer the services of Celgene Patient Support^® or similar outside services to serve as a dedicated, central point of contact for patients and healthcare professionals who use or prescribe our products. Celgene Patient Support^® is a free service that helps patients and

15

healthcare professionals navigate the challenges of reimbursement, providing information about co-pay assistance and answering questions about obtaining our products.

In most countries, we promote our products through our own sales organizations. In some countries, particularly in Latin America, we partner with third-party distributors. Generally, we distribute our products through commonly used channels in local markets. However, REVLIMID^®, POMALYST^®/IMNOVID^® and THALOMID^®/Thalidomide Celgene^TM are distributed under mandatory risk-management distribution programs (such as REMS) tailored to meet local authorities' specifications to provide for their safe and appropriate distribution and use.

EMPLOYEES

As of December 31, 2015, we had 6,971 full-time employees, of whom 2,482 were engaged primarily in research and development activities, 2,442 were engaged primarily in sales and commercialization activities, 665 were engaged primarily in manufacturing, and the remaining 1,382 were engaged primarily in management and general and administrative activities. The number of full-time employees in our international operations has grown from 2,292 at the end of 2014 to 2,869 at the end of 2015. We also employ a number of part-time employees and maintain consulting arrangements with a number of researchers at various universities and other research institutions around the world.

SEASONALITY

Our worldwide product sales do not reflect any significant degree of seasonality in end-user demand. Several other factors, including government rebates, distributor buying patterns and government tender timing impact the dollar value of product sales recorded in any particular quarter. In the United States, manufacturers of pharmaceutical products are responsible for 50 percent of the patient’s cost of branded prescription drugs related to the Medicare Part D Coverage Gap. We fulfill this obligation by providing rebates to the government, resulting in a reduction in the dollar value of U.S. net product sales in the quarter in which the rebates are provided. Historically, these rebates are higher during the first quarter primarily due to the larger volume of patient deductibles at the beginning of a calendar year. In addition, in the U.S., the timing of net product sales may be affected by fluctuations in wholesaler inventory levels. Outside of the U.S., the timing of governmental tenders for product may also impact net product sales in a particular quarter.

AVAILABLE INFORMATION

Our Current Reports on Form 8-K, Quarterly Reports on Form 10-Q and Annual Reports on Form 10-K are electronically filed with or furnished to the Securities and Exchange Commission (SEC), and all such reports and amendments to such reports have been and will be made available, free of charge, through our website (http://www.celgene.com) as soon as reasonably practicable after submission to the SEC. Such reports will remain available on our website for at least 12 months. The contents of our website or any other website are not incorporated by reference into this Annual Report on Form 10-K. The public may read and copy any materials filed by us with the SEC at the SEC's Public Reference Room at 100 F Street, NW, Washington, D.C. 20549.

The public may obtain information on the operation of the SEC's Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC maintains an Internet site (http://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

DISCLOSURE PURSUANT TO SECTION 219 OF THE IRAN THREAT REDUCTION AND SYRIA HUMAN RIGHTS ACT OF 2012

Section 219 of the Iran Threat Reduction and Syria Human Rights Act of 2012 (ITRSHRA) added Section 13(r) to the Securities Exchange Act of 1934, as amended, which requires, among other things, disclosure by an issuer, in its annual or quarterly reports, as applicable, whether it or any of its affiliates knowingly conducted, without specific authority from a U.S. federal department or agency, any transaction or dealing with the Government of Iran, which includes, without limitation, any person or entity owned or controlled, directly or indirectly, by the Government of Iran or any of its political subdivisions, agencies or instrumentalities. Neither Celgene nor, to its knowledge, any of its affiliates engaged in activities during 2015 that are required to be disclosed pursuant to ITRSHRA.

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FORWARD-LOOKING STATEMENTS

Certain statements contained or incorporated by reference in this Annual Report on Form 10-K are considered forward-looking statements (within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended) concerning our business, results of operations, economic performance and/or financial condition, based on management's current expectations, plans, estimates, assumptions and projections. Forward-looking statements are included, for example, in the discussions about:

• strategy;

• new product discovery and development;

• current or pending clinical trials;

• our products' ability to demonstrate efficacy or an acceptable safety profile;

• actions by the FDA and other regulatory authorities;

• product manufacturing, including our arrangements with third-party suppliers;

• product introduction and sales;

• royalties and contract revenues;

• expenses and net income;

• credit and foreign exchange risk management;

• liquidity;

• asset and liability risk management;

• the outcome of litigation and other proceedings;

• intellectual property rights and protection;

• economic factors;

• competition; and

• operational and legal risks.

Any statements contained in this report that are not statements of historical fact may be deemed forward-looking statements. Forward-looking statements generally are identified by the words "expects," "anticipates," "believes," "intends," "estimates," "aims," "plans," "may," "could," "will," "will continue," "seeks," "should," "predict," "potential," "outlook," "guidance," "target," "forecast," "probable," "possible" or the negative of such terms and similar expressions. Forward-looking statements are subject to change and may be affected by risks and uncertainties, most of which are difficult to predict and are generally beyond our control. Forward-looking statements speak only as of the date they are made, and we undertake no obligation to update any forward-looking statement in light of new information or future events, although we intend to continue to meet our ongoing disclosure obligations under the U.S. securities laws and other applicable laws.

We caution you that a number of important factors could cause actual results or outcomes to differ materially from those expressed in, or implied by, the forward-looking statements, and therefore you should not place too much reliance on them. These factors include, among others, those described herein, under "Risk Factors" and elsewhere in this Annual Report on Form 10-K and in our other public reports filed with the SEC. It is not possible to predict or identify all such factors, and therefore the factors that are noted are not intended to be a complete discussion of all potential risks or uncertainties that may affect forward-looking statements. If these or other risks and uncertainties materialize, or if the assumptions underlying any of the forward-looking statements prove incorrect, our actual performance and future actions may be materially different from those expressed in, or implied by, such forward-looking statements. We can offer no assurance that our estimates or expectations will prove accurate or that we will be able to achieve our strategic and operational goals.

Item 1A. Risk Factors

The following describes major risks to our business and should be considered carefully. Any of these factors could significantly and negatively affect our business, prospects, financial condition, operating results or credit ratings, which could cause the trading prices of our equity securities to decline. The risks described below are not the only risks we may face. Additional risks and uncertainties not presently known to us, or risks that we currently consider immaterial, could also negatively affect us.

Our operating results may be subject to significant fluctuations.

Our operating results may fluctuate from quarter to quarter and year to year for a number of reasons, including the risks discussed elsewhere in this “Risk Factors” section. Events such as a delay in product development or a revenue shortfall may cause financial results for a particular period to be below our expectations. In addition, we have experienced and may continue to experience fluctuations in our quarterly operating results due to the timing of charges that we may take. We have recorded, or may be required to record, charges that include development milestone and license payments under collaboration and license agreements, amortization of acquired intangibles and other acquisition related charges, and impairment charges.

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Our revenues are also subject to foreign exchange rate fluctuations due to the global nature of our operations. We recognize foreign currency gains or losses arising from our operation in the period in which we incur those gains or losses. Although we utilize foreign currency forward contracts and occasionally foreign currency put and call options to manage foreign currency risk, our efforts to reduce currency exchange losses may not be successful. As a result, currency fluctuation among our reporting currency, the U.S. dollar, and the currencies in which we do business will affect our operating results. Our net income may also fluctuate due to the impact of charges we may be required to take with respect to foreign currency and other hedge transactions. In particular, we may incur higher than expected charges from hedge ineffectiveness or from the termination of a hedge arrangement. For more information, see Item 7A. "Quantitative and Qualitative Disclosures About Market Risk."

We are dependent on the continued commercial success of our primary products, REVLIMID^®, VIDAZA^®, THALOMID^®, ABRAXANE^®, POMALYST^®/IMNOVID^® and OTEZLA^®.

Currently, our business is largely dependent on the commercial success of REVLIMID^®, VIDAZA^®, THALOMID^®, ABRAXANE^®,POMALYST^®/IMNOVID^® and OTEZLA^®. The success of these products depends on acceptance by regulators, key opinion leaders, physicians, and patients as effective drugs with certain advantages over other therapies. A number of factors, as discussed in greater detail below, may adversely impact the degree of acceptance of these products, including their efficacy, safety, price and benefits over competing products, as well as the reimbursement policies of third-party payers, such as government and private insurance plans.

If unexpected adverse events are reported in connection with the use of any of these products, physician and patient acceptance of the product could deteriorate and the commercial success of such product could be adversely affected. We are required to report to the FDA or similar bodies in other countries events associated with our products relating to death or serious injury. Adverse events could result in additional regulatory controls, such as the imposition of costly post-approval clinical studies or revisions to our approved labeling which could limit the indications or patient population for a product or could even lead to the withdrawal of a product from the market. THALOMID^® is known to be toxic to the human fetus and exposure to the drug during pregnancy could result in significant deformities. REVLIMID^® and POMALYST^®/IMNOVID^® are also considered toxic to the human fetus and their respective labels contain warnings against use which could result in embryo-fetal exposure. While we have restricted distribution systems for THALOMID^®, REVLIMID^®, and POMALYST^®/IMNOVID^®, and endeavor to educate patients regarding the potential known adverse events, including pregnancy risks, we cannot ensure that all such warnings and recommendations will be complied with or that adverse events resulting from non-compliance will not occur.

Our future commercial success depends on gaining regulatory approval for products in development, and obtaining approvals for our current products for additional indications.

The testing, manufacturing and marketing of our products require regulatory approvals, including approval from the FDA and similar bodies in other countries. Certain of our pharmaceutical products, such as FOCALIN^®, also require authorization by the U.S. Drug Enforcement Agency (DEA) of the U.S. Department of Justice. Our future growth would be negatively impacted if we fail to obtain timely, or at all, requisite regulatory approvals in the United States and internationally for products in development and approvals for our existing products for additional indications.

The principal risks to obtaining and maintaining regulatory approvals are as follows:

• In general, preclinical tests and clinical trials can take many years and require the expenditure of substantial resources, and the data obtained from these tests and trials may not lead to regulatory approval;

• Delays or rejections may be encountered during any stage of the regulatory process if the clinical or other data fails to demonstrate compliance with a regulatory agency’s requirements for safety, efficacy and quality;

• Requirements for approval may become more stringent due to changes in regulatory agency policy or the adoption of new regulations or legislation;

• Even if a product is approved, the scope of the approval may significantly limit the indicated uses or the patient population for which the product may be marketed and may impose significant limitations in the nature of warnings, precautions and contra-indications that could materially affect the sales and profitability of the product;

• After a product is approved, the FDA or similar bodies in other countries may withdraw or modify an approval in a significant manner or request that we perform additional clinical trials or change the labeling of the product due to a number of reasons, including safety concerns, adverse events and side effects;

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• Products, such as REVLIMID^® and POMALYST^®/IMNOVID^®, that receive accelerated approval can be subject to an expedited withdrawal if post-marketing restrictions are not adhered to or are shown to be inadequate to assure safe use, or if the drug is shown to be unsafe or ineffective under its conditions of use;

• Guidelines and recommendations published by various governmental and non-governmental organizations can reduce the use of our approved products;

• Approved products, as well as their manufacturers, are subject to continuing and ongoing review by regulatory agencies, and the discovery of previously unknown problems with these products or the failure to comply with manufacturing or quality control requirements may result in restrictions on the manufacture, sale or use of a product or its withdrawal from the market; and

• Changes in regulatory agency policy or the adoption of new regulations or legislation could impose restrictions on the sale or marketing of our approved products.

If we fail to comply with laws or government regulations or policies our business could be adversely affected.

The discovery, preclinical development, clinical trials, manufacturing, risk evaluation and mitigation strategies (such as our REMS^TM program), marketing and labeling of pharmaceuticals and biologics are all subject to extensive laws and government regulations and policies. In addition, individual states, acting through their attorneys general, are increasingly seeking to regulate the marketing of prescription drugs under state consumer protection and false advertising laws. If we fail to comply with the laws and regulations regarding the promotion and sale of our products, appropriate distribution of our products under our restricted distribution systems, off-label promotion and the promotion of unapproved products, government agencies may bring enforcement actions against us or private litigants may assert claims on behalf of the government against us that could inhibit our commercial capabilities and/or result in significant damage awards and penalties.

Other matters that may be the subject of governmental or regulatory action which could adversely affect our business include laws, regulations and policies governing:

• protection of the environment, privacy, healthcare reimbursement programs, and competition;

• parallel importation of prescription drugs from outside the United States at prices that are regulated by the governments of various foreign countries; and

• mandated disclosures of clinical trial or other data, such as the EMA’s policy on publication of clinical data.

The FDA’s Center for Biologics Evaluation and Research currently regulates human tissue or cells intended for transplantation, implantation, infusion or transfer to a human, requiring, among other things, cell and tissue establishments to screen and test donors, prepare and follow written procedures for the prevention of the spread of communicable disease and register with FDA. Through our Celgene Cellular Therapeutics (CCT) subsidiary, we are licensed in certain states to operate our allogeneic and private stem cell banking businesses. If we are unable to maintain those licenses or are unable to obtain licenses in other states that may adopt similar licensing requirements, those businesses could be adversely affected.

Sales of our products will be significantly reduced if access to and reimbursement for our products by governmental and other third-party payers are reduced or terminated.

Sales of our current and future products depend, in large part, on the conditions under which our products are paid for by health maintenance, managed care, pharmacy benefit and similar health care management organizations (HCMOs), or reimbursed by government health administration authorities, private health coverage insurers and other third-party payers.

The influence of HCMOs has increased in recent years due to the growing number of patients receiving coverage through a few large HCMOs as a result of industry consolidation. One objective of HCMOs is to contain and, where possible, reduce healthcare expenditures. HCMOs typically use formularies (lists of approved medicines available to members of a particular HCMO), clinical protocols, volume purchasing, long-term contracts and other methods to negotiate prices with pharmaceutical providers. Due to their lower cost generally, generic medicines are typically placed in preferred tiers of HCMO formularies. Additionally, many formularies include alternative and competitive products for treatment of particular medical problems. Exclusion of our products from a formulary or HCMO-implemented restrictions on the use of our products can significantly impact drug usage in the HCMO patient population, and consequently our revenues.

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Generally, in Europe and other countries outside the United States, the government-sponsored healthcare system is the primary payer of patients’ healthcare costs. These health care management organizations and third-party payers are increasingly challenging the prices charged for medical products and services, seeking to implement cost-containment programs, including price controls, restrictions on reimbursement and requirements for substitution of generic products. Our products continue to be subject to increasing price and reimbursement pressure due to price controls imposed by governments in many countries; increased difficulty in obtaining and maintaining satisfactory drug reimbursement rates; and the tendency of governments and private health care providers to favor generic pharmaceuticals. In addition, governmental and private third-party payers and purchasers of our products may restrict access to formularies or otherwise discourage use of our products. Limitations on patient access to our drugs, adoption of price controls and cost-containment measures could adversely affect our business. In addition, our operating results may also be affected by distributors seeking to take advantage of price differences among various markets by buying our products in low cost markets for resale in higher cost markets.

The Affordable Care Act and other legislation may affect our pricing policies and government reimbursement of our products that may adversely impact our revenues and profitability.

In the U.S. there have been and may continue to be a number of legislative and regulatory proposals and enactments related to drug pricing and reimbursement that could impact our profitability. The Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 were signed into law in March 2010, and are referred to collectively as the Healthcare Reform Acts. Although these reforms have significantly impacted the pharmaceutical industry, the full effects of these provisions will become apparent over time as these laws are implemented and the Centers for Medicare & Medicaid Services (CMS) and other agencies issue applicable regulations or guidance as required by the Healthcare Reform Acts. Moreover, in the coming years, additional changes could be made to governmental healthcare programs that could significantly impact the profitability of our products. On January 21, 2016, CMS issued a final rule implementing the Medicaid rebate provisions of the Affordable Care Act.  The majority of the requirements in the rule are effective April 1, 2016. We are currently evaluating the implications of the rule on our business.

The Healthcare Reform Acts, among other things, made significant changes to the Medicaid rebate program by increasing the minimum rebates that manufacturers like us are required to pay. These changes also expanded the government’s 340B drug discount program by increasing the category of entities qualified to participate in the program and benefit from its deeply discounted drug pricing. We have received inquiries from the Health Resources and Services Administration of the Department of Health & Human Services (“HRSA”) regarding our compliance with the 340B program. We have responded to these inquiries and believe that we have complied with applicable legal requirements. If, however, we are ultimately required to change our sales or pricing practices, there would be an adverse effect on our revenues and profitability.

Our ability to sell our products to hospitals in the United States depends in part on our relationships with group purchasing organizations.

Many existing and potential customers for our products become members of group purchasing organizations (GPOs). GPOs negotiate pricing arrangements and contracts, sometimes on an exclusive basis, with medical supply manufacturers and distributors and these negotiated prices are made available to a GPO’s affiliated hospitals and other members. If we are not one of the providers selected by a GPO, affiliated hospitals and other members may be less likely to purchase our products, and if the GPO has negotiated a strict sole source, market share compliance or bundling contract for another manufacturer’s products, we may be precluded from making sales to members of the GPO for the duration of that contractual arrangement. Our failure to enter into or renew contracts with GPOs may cause us to lose market share and could adversely affect our sales.

Our long-term success depends, in part, on intellectual property protection.

Our success depends, in part, on our ability to obtain and enforce patents, protect trade secrets, obtain licenses to technology owned by third parties and to conduct our business without infringing upon the proprietary rights of others. The patent positions of pharmaceutical and biopharmaceutical companies, including ours, can be uncertain and involve complex legal and factual questions. There can be no assurance that if claims of any of our owned or licensed patents are challenged by one or more third parties (through, for example, litigation, post grant review in the United States Patent and Trademark Office (USPTO) or European Patent Office (EPO)), a court or patent authority ruling on such challenge will ultimately determine, after all opportunities for appeal have been exhausted, that our patent claims are valid and enforceable. If a third party is found to have rights covering products or processes used by us, we could be forced to cease using such products or processes, be subject to significant liabilities to such third party and/or be required to obtain license rights from such third party. Lawsuits involving patent claims are costly and could affect our results of operations, result in significant expense and divert the attention of managerial and scientific personnel. For more information on challenges to certain of our patents and settlement of certain of these challenges, see Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

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In addition, we do not know whether any of our owned or licensed pending patent applications will result in the issuance of patents or, if patents are issued, whether they will be dominated by third-party patent rights, provide significant proprietary protection or commercial advantage or be circumvented, opposed, invalidated, rendered unenforceable or infringed by others.

Our intellectual property rights may be affected in ways that are difficult to anticipate at this time under the provisions of the America Invents Act enacted in 2011. This law represents a significant change to the US patent system. Uncertainty exists in the application and interpretation of various aspects of the America Invents Act. For example, post grant review procedures have been implemented that potentially represent a significant threat to a company’s patent portfolio. Members of the public may seek to challenge an issued patent by petitioning the USPTO to institute a post grant review. Once instituted, the USPTO may find grounds to revoke the challenged patent or specific claims therein. For example, on April 23, 2015, a party filed a petition to institute an Inter Partes Review (IPR) challenging the validity of our patent US 6,045,501 and three petitions challenging patent US 6,315,720. On October 27, 2015, the USPTO granted all four petitions. In addition, on May 7, 2015 another IPR was filed against our compound patent US 5,635,517 for lenalidomide, set to expire in 2019. On November 15, 2015, the USPTO rejected this challenge by denying the institution of the IPR procedure. For more information with respect to the recently instituted IPRs, see Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K. A procedure similar to the IPR has existed in Europe for many years and we have defended our European patents in certain of those proceedings. For example, the validity of our patent EP 1 667 682 is currently the subject of an opposition proceeding before the EPO. We cannot predict whether any other Celgene patents will ever become the subject of a post grant review. If a significant product patent is successfully challenged in a post grant review proceeding it may be revoked, which would have a serious negative impact on our ability to maintain exclusivity in the market-place for our commercial products affected by such revocation and could adversely affect our future revenues and profitability.

On October 2, 2014, the EMA adopted its clinical transparency policy, "Policy on Publication of Clinical Data for Medicinal Products for Human Use" (Clinical Data Policy), which became effective on January 1, 2015. In general, under the Clinical Data Policy, clinical data is not deemed to be commercially confidential data. Therefore, there is a risk that unpublished proprietary information, including trade secrets that are incorporated into a marketing application before the EMA may be made publicly available. It is difficult to predict how any public disclosure of our trade secrets or other confidential and proprietary information made available under the Clinical Data Policy may adversely impact our patent rights and our competitive advantage in the marketplace.

Also, procedures for obtaining patents and the degree of protection against the use of a patented invention by others vary from country to country. There can be no assurance that the issuance to us in one country of a patent covering an invention will be followed by the issuance in other countries of patents covering the same invention or that any judicial interpretation of the validity, enforceability or scope of the claims in a patent issued in one country will be similar to or recognized by the judicial interpretation given to a corresponding patent issued in another country.

The USPTO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment and other similar provisions during the patent application process. While an inadvertent lapse can in many cases be cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction.

We also rely upon unpatented, proprietary and trade secret technology that we seek to protect, in part, by confidentiality agreements with our collaborative partners, employees, consultants, outside scientific collaborators, sponsored researchers and other advisors. Despite precautions taken by us, there can be no assurance that these agreements provide meaningful protection, that they will not be breached, that we would have adequate remedies for any such breach or that our proprietary and trade secret technologies will not otherwise become known to others or found to be non-proprietary.

We receive confidential and proprietary information from collaborators, prospective licensees and other third parties. In addition, we employ individuals who were previously employed at other biotechnology or pharmaceutical companies. We may be subject to claims that we or our employees, consultants or independent contractors have inadvertently or otherwise used or disclosed confidential information of these third parties or our employees’ former employers. Litigation may be necessary to defend against these claims, which can result in significant costs if we are found to have improperly used the confidential or proprietary information of others. Even if we are successful in defending against these claims, litigation could result in substantial costs and diversion of personnel and resources.

Our products may face competition from lower cost generic or follow-on products.

Manufacturers of generic drugs are seeking to compete with our drugs and present a significant challenge to us. Those manufacturers

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may challenge the scope, validity or enforceability of our patents in court, requiring us to engage in complex, lengthy and costly litigation. If any of our owned or licensed patents are infringed or challenged, we may not be successful in enforcing or defending those intellectual property rights and, as a result, may not be able to develop or market the relevant product exclusively, which would have a material adverse effect on our sales of that product. In addition, manufacturers of innovative drugs as well as generic drug manufacturers may be able to design their products around our owned or licensed patents and compete with us using the resulting alternative technology. For more information concerning certain pending proceedings relating to our intellectual property rights and settlements of certain challenges, see Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

Upon the expiration or loss of patent protection for a product, or upon the “at-risk” launch (despite pending patent infringement litigation against the generic product) by a manufacturer of a generic version of one of our products, we can quickly lose a significant portion of our sales of that product. In addition, if generic versions of our competitors’ branded products lose their market exclusivity, our patented products may face increased competition or pricing pressure.

Our business operates in an extremely competitive environment.

The pharmaceutical and biotechnology industries in which we operate are highly competitive and subject to rapid and significant technological change. Our present and potential competitors include major pharmaceutical and biotechnology companies, as well as specialty pharmaceutical firms, including, but not limited to:

• Hematology and Oncology: AbbVie, Amgen, AstraZeneca, Bristol-Myers-Squibb, Eisai, Gilead, Johnson & Johnson, Merck, Novartis, Roche/Genentech, Sanofi and Takeda.

• Inflammation and Immunology: AbbVie, Amgen, Biogen, Eisai, Eli Lilly, Johnson & Johnson, Merck, Pfizer, Novartis and UCB S.A.

Some of these companies have considerably greater financial, technical and marketing resources than we have, enabling them, among other things, to make greater research and development investments. We also experience competition in drug development from universities and other research institutions, and we compete with others in acquiring technology from these sources. The pharmaceutical industry has undergone, and is expected to continue to undergo, rapid and significant technological change and we expect competition to intensify as technical advances are made and become more widely known. The development of products or processes by our competitors with significant advantages over those that we are developing could adversely affect our future revenues and profitability.

A decline in general economic conditions would adversely affect our results of operations.

Sales of our products are dependent, in large part, on third-party payers. As a result of global credit and financial market conditions, these organizations may be unable to satisfy their reimbursement obligations or may delay payment. For information about amounts receivable from the government-owned or -controlled hospitals in Spain, Italy and Portugal, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

In addition, due to tightened global credit, there may be a disruption or delay in the performance of our third-party contractors, suppliers or collaborators. We rely on third parties for several important aspects of our business, including portions of our product manufacturing, clinical development of future collaboration products, conduct of clinical trials and supply of raw materials. If such third parties are unable to satisfy their commitments to us, our business could be adversely affected.

We may be required to modify our business practices, pay fines and significant expenses or experience other losses due to governmental investigations or other enforcement activities.

We may become subject to litigation or governmental investigations in the United States and foreign jurisdictions that may arise from the conduct of our business. Like many companies in our industry, we have from time to time received inquiries and subpoenas and other types of information requests from government authorities and we have been subject to claims and other actions related to our business activities.

While the ultimate outcomes of investigations and legal proceedings are difficult to predict, adverse resolutions or settlements of those matters could result in, among other things:

• significant damage awards, fines, penalties or other payments, and administrative remedies, such as exclusion and/or debarment from government programs, or other rulings that preclude us from operating our business in a certain manner;

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• changes and additional costs to our business operations to avoid risks associated with such litigation or investigations;

• product recalls;

• reputational damage and decreased demand for our products; and

• expenditure of significant time and resources that would otherwise be available for operating our business.

For more information relating to governmental investigations and other legal proceedings and recent settlements of legal proceedings, see Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

The development of new biopharmaceutical products involves a lengthy and complex process and we may be unable to commercialize any of the products we are currently developing.

Many of our drug candidates are in the early or mid-stages of research and development and will require the commitment of substantial financial resources, extensive research, development, preclinical testing, clinical trials, manufacturing scale-up and regulatory approval prior to being ready for sale. This process takes many years of effort without any assurance of ultimate success. Our product development efforts with respect to a product candidate may fail for many reasons, including:

• the failure of the product candidate in preclinical or clinical studies;

• adverse patient reactions to the product candidate or indications of other safety concerns;

• insufficient clinical trial data to support the effectiveness or superiority of the product candidate;

• our inability to manufacture sufficient quantities of the product candidate for development or commercialization activities in a timely and cost-efficient manner;

• our failure to obtain, or delays in obtaining, the required regulatory approvals for the product candidate, the facilities or the process used to manufacture the product candidate;

• changes in the regulatory environment, including pricing and reimbursement, that make development of a new product or of an existing product for a new indication no longer attractive;

• the failure to obtain or maintain satisfactory drug reimbursement rates by governmental or third-party payers; and

• the development of a competitive product or therapy.

The stem cell products that we are developing through our CCT subsidiary may represent substantial departures from established treatment methods and will compete with a number of traditional products and therapies which are now, or may be in the future, manufactured and marketed by major pharmaceutical and biopharmaceutical companies. Furthermore, public attitudes may be influenced by claims that stem cell therapy is unsafe and stem cell therapy may not gain the acceptance of the public or the medical community.

If a product were to fail to be approved or if sales fail to materialize for a newly approved product, we may incur losses related to the write-down of inventory, impairment of property, plant and equipment dedicated to the product or expenses related to restructuring.

Disruptions of our manufacturing and distribution operations could significantly interrupt our production and distribution capabilities.

We have our own manufacturing facilities for many of our products and we have contracted with third parties to provide other manufacturing, finishing, and packaging services. Any of those manufacturing processes could be partially or completely disrupted by fire, contamination, natural disaster, terrorist attack or governmental action. A disruption could lead to substantial production delays and the need to establish alternative manufacturing sources for the affected products requiring additional regulatory approvals. In the interim, our finished goods inventories may be insufficient to satisfy customer orders on a timely basis. Further, our business interruption insurance may not adequately compensate us for any losses that may occur.

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In all the countries where we sell our products, governmental regulations define standards for manufacturing, packaging, labeling, distributing and storing pharmaceutical products. Our failure to comply, or the failure of our contract manufacturers and distributors to comply with applicable regulations could result in sanctions being imposed on them or us, including fines, injunctions, civil penalties, disgorgement, suspension or withdrawal of approvals, license revocation, seizures or recalls of products, operating restrictions and criminal prosecutions.

We have contracted with various distributors to distribute most of our branded products.If our distributors fail to perform and we cannot secure a replacement distributor within a reasonable period of time, our revenue could be adversely affected.

The consolidation of drug wholesalers and other wholesaler actions could increase competitive and pricing pressures.

We sell our pharmaceutical products in the United States primarily through wholesale distributors and contracted pharmacies. These wholesale customers comprise a significant part of our distribution network for pharmaceutical products in the United States. This distribution network is continuing to undergo significant consolidation. As a result, a smaller number of large wholesale distributors and pharmacy chains control a significant share of the market. We expect that consolidation of drug wholesalers and pharmacy chains will increase competitive and pricing pressures on pharmaceutical manufacturers, including us. In addition, wholesalers may apply pricing pressure through fee-for-service arrangements and their purchases may exceed customer demand, resulting in increased returns or reduced wholesaler purchases in later periods.

Risks from the improper conduct of employees, agents, contractors or collaborators could adversely affect our business or reputation.

We cannot ensure that our compliance controls, policies and procedures will in every instance protect us from acts committed by our employees, agents, contractors or collaborators that violate the laws or regulations of the jurisdictions in which we operate, including employment, anti-corruption, environmental, competition and privacy laws. Such improper actions, particularly with respect to foreign healthcare professionals and government officials, could subject us to civil or criminal investigations, monetary and injunctive penalties, adversely impact our ability to conduct business in certain markets, negatively affect our results of operations and damage our reputation.

We are subject to a variety of risks related to the conduct and expansion of our business internationally, particularly in emerging markets.

As our operations expand globally, we are subject to risks associated with conducting business in foreign markets, particularly in emerging markets. Those risks include:

• increased management, travel, infrastructure and legal compliance costs;

• longer payment and reimbursement cycles;

• difficulties in enforcing contracts and collecting accounts receivable;

• local marketing and promotional challenges;

• lack of consistency, and unexpected changes, in foreign regulatory requirements and practices;

• increased risk of governmental and regulatory scrutiny and investigations;

• increased exposure to fluctuations in currency exchange rates;

• the burdens of complying with a wide variety of foreign laws and legal standards;

• operating in locations with a higher incidence of corruption and fraudulent business practices;

• difficulties in staffing and managing foreign sales and development operations;

• import and export requirements, tariffs, taxes and other trade barriers;

• weak or no protection of intellectual property rights;

• possible enactment of laws regarding the management of and access to data and public networks and websites;

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• possible future limitations on foreign-owned businesses;

• increased financial accounting and reporting burdens and complexities; and

• other factors beyond our control, including political, social and economic instability, popular uprisings, war, terrorist attacks and security concerns in general.

As we continue to expand our business into multiple international markets, our success will depend, in large part, on our ability to anticipate and effectively manage these and other risks associated with our international operations. Any of these risks could harm our international operations and reduce our sales, adversely affecting our business, results of operations, financial condition and growth prospects.

We may not realize the anticipated benefits of acquisitions and strategic initiatives.

We may face significant challenges in effectively integrating entities and businesses that we acquire and we may not realize the benefits anticipated from such acquisitions. Achieving the anticipated benefits of our acquired businesses, such as the recent acquisition of Receptos, will depend in part upon whether we can integrate our businesses in an efficient and effective manner. Our integration of acquired businesses involves a number of risks, including:

• demands on management related to the increase in our size after an acquisition;

• the diversion of management’s attention from daily operations to the integration of acquired businesses and personnel;

• higher than anticipated integration costs;

• failure to achieve expected synergies and costs savings;

• difficulties in the assimilation and retention of employees;

• difficulties in the assimilation of different cultures and practices, as well as in the assimilation of broad and geographically dispersed personnel and operations; and

• difficulties in the integration of departments, systems, including accounting systems, technologies, books and records and procedures, as well as in maintaining uniform standards and controls, including internal control over financial reporting, and related procedures and policies.

In addition, we may not be able to realize the projected benefits of corporate strategic initiatives we may pursue in the future.

We may not be able to continue to attract and retain highly qualified managerial, scientific, manufacturing and commercial talent.

The success of our business depends, in large part, on our continued ability to attract and retain highly qualified managerial, scientific, medical, manufacturing, commercial and other professional personnel, and competition for these types of personnel is intense. We cannot be sure that we will be able to attract or retain skilled personnel or that the costs of doing so will not materially increase.

Risks associated with using hazardous materials in our business could subject us to significant liability.

We use certain hazardous materials in our research, development, manufacturing and other business activities. If an accident or environmental discharge occurs, or if we discover contamination caused by prior owners and operators of properties we acquire, we could be liable for remediation obligations, damages and fines that could exceed our insurance coverage and financial resources. Additionally, the cost of compliance with environmental and safety laws and regulations may increase in the future, requiring us to expend more financial resources either in compliance or in purchasing supplemental insurance coverage.

We are subject to various legal proceedings, claims and investigative demands in the ordinary course of our business, the ultimate outcome of which may result in significant expense, payments and penalties.

We and certain of our subsidiaries are involved in various legal proceedings that include patent, product liability, consumer, commercial, antitrust and other claims that arise from time to time in the ordinary course of our business. Litigation is inherently unpredictable. Although we believe we have substantial defenses in these matters, we could in the future be subject to adverse

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judgments, enter into settlements of claims or revise our expectations regarding the outcomes of certain matters, and such developments could have a material adverse effect on our results of operations in the period in which such judgments are received or settlements occur. For more information regarding settlement of certain legal proceedings, see Note 18 to Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

Our activities relating to the sale and marketing and the pricing of our products are subject to extensive regulation under the U.S. Federal Food, Drug, and Cosmetic Act, the Medicaid Drug Rebate Program, the False Claims Act, the Foreign Corrupt Practices Act and other federal and state statutes, including those discussed in this Annual Report on Form 10-K, as well as anti-kickback and false claims laws, and similar laws in international jurisdictions. Like many companies in our industry, we have from time to time received inquiries and subpoenas and other types of information demands from government authorities, and been subject to claims and other actions related to our business activities brought by governmental authorities, as well as by consumers, third-party payers, stockholders and others. There can be no assurance that existing or future proceedings will not result in significant expense, civil payments, fines or other adverse consequences.

Product liability claims could adversely affect our business, results of operations and financial condition.

Product liability claims could result in significant damage awards or settlements. Such claims can also be accompanied by consumer fraud claims or claims by third-party payers seeking reimbursement of the cost of our products. In addition, adverse determinations or settlements of product liability claims may result in suspension or withdrawal of a product marketing authorization or changes to our product labeling, including restrictions on therapeutic indications, inclusion of new contraindications, warnings or precautions, which would have a material adverse effect on sales of such product. We have historically purchased product liability coverage from third-party carriers for a portion of our potential liability. Such insurance has become increasingly difficult and costly to obtain. In this context and in light of the strength of our balance sheet, commencing in the second quarter of 2016, we will self-insure these risks. Product liability claims, regardless of their merits or ultimate outcome, are costly, divert management's attention, may harm our reputation and can impact the demand for our products. There can be no assurance that we will be able to recover under any existing third-party insurance policy or that such coverage will be adequate to fully cover all risks or damage awards or settlements. Additionally, if we are unable to meet our self-insurance obligations for claims that are more than we estimated or reserved for that require substantial expenditures, there could be a material adverse effect on our financial statements and results of operations.

Changes in our effective income tax rate could adversely affect our results of operations.

We are subject to income taxes in both the United States and various foreign jurisdictions and our domestic and international tax liabilities are largely dependent upon the distribution of income among these different jurisdictions. Various factors may have favorable or unfavorable effects on our effective income tax rate. These factors include interpretations of existing tax laws, the accounting for stock options and other share-based compensation, changes in tax laws and rates, future levels of research and development spending, changes in accounting standards, changes in the mix of earnings in the various tax jurisdictions in which we operate, the outcome of examinations by the U.S. Internal Revenue Service and other tax authorities, the accuracy of our estimates for unrecognized tax benefits and realization of deferred tax assets and changes in overall levels of pre-tax earnings. The impact on our income tax provision resulting from the above-mentioned factors and others could have a material impact on our results of operations.

Currency fluctuations and changes in exchange rates could adversely affect our revenue growth, increase our costs and cause our profitability to decline.

We collect and pay a substantial portion of our sales and expenditures in currencies other than the U.S. dollar. Therefore, fluctuations in foreign currency exchange rates affect our operating results. We utilize foreign currency forward contracts and occasionally foreign currency put and call options, all of which are derivative instruments, to manage foreign currency risk. We use these derivative instruments to hedge certain forecasted transactions, manage exchange rate volatility in the translation of foreign earnings and reduce exposures to foreign currency fluctuations of certain balance sheet items denominated in foreign currencies. The use of these derivative instruments is intended to mitigate a portion of the exposure of these risks with the intent to reduce our risk or cost, but generally would not fully offset any change in operating results as a consequence of fluctuations in foreign currencies. Any significant foreign exchange rate fluctuations could adversely affect our financial condition and results of operations. See Note 5 of Notes to Consolidated Financial Statements and Item 7A. “Quantitative and Qualitative Disclosures About Market Risk” contained in this Annual Report on Form 10-K.

26

We may experience an adverse market reaction if we are unable to meet our financial reporting obligations.

As we continue to expand at a rapid pace, the development of new and/or improved automated systems will remain an ongoing priority. During this expansion period, our internal control over financial reporting may not prevent or detect misstatements in our financial reporting. Such misstatements may result in litigation and/or negative publicity and possibly cause an adverse market reaction that may negatively impact our growth plans and the value of our common stock.

Impairment charges or write downs in our books and changes in accounting standards could have a significant adverse effect on our results of operations and financial condition.

New or revised accounting standards, rules and interpretations could result in changes to the recognition of income and expense that may materially and adversely affect our financial results. In addition, the value allocated to certain of our assets could be substantially impaired due to a number of factors beyond our control. Also, if any of our strategic equity investments decline in value, we may be required to write down such investments.

The price of our common stock may fluctuate significantly.

The market for our shares of common stock may fluctuate significantly. The following key factors may have an adverse impact on the market price of our common stock:

• results of our clinical trials or adverse events associated with our marketed products;

• fluctuations in our commercial and operating results;

• announcements of technical or product developments by us or our competitors;

• market conditions for pharmaceutical and biotechnology stocks in particular;

• changes in laws and governmental regulations, including changes in tax, healthcare, environmental, competition and patent laws;

• new accounting pronouncements or regulatory rulings;

• public announcements regarding medical advances in the treatment of the disease states that we are targeting;

• patent or proprietary rights developments;

• changes in pricing and third-party reimbursement policies for our products;

• the outcome of litigation involving our products, processes or intellectual property;

• the existence and outcome of governmental investigations and proceedings;

• regulatory actions that may impact our products or potential products;

• disruptions in our manufacturing processes or supply chain;

• failure of our collaboration partners to successfully develop potential drug candidates;

• competition; and

• investor reaction to announcements regarding business or product acquisitions.

In addition, a market downturn in general and/or in the biopharmaceutical sector in particular, may adversely affect the market price of our securities, which may not necessarily reflect the actual or perceived value of our Company.

Our business would be adversely affected if we are unable to service our debt obligations.

We have incurred various forms of indebtedness, including senior notes, commercial paper and a senior unsecured credit facility. Our ability to pay interest and principal amounts when due, comply with debt covenants or repurchase the senior notes if a change of control occurs, will depend upon, among other things, continued commercial success of our products and other factors that

27

affect our future financial and operating performance, including prevailing economic conditions and financial, business and regulatory factors, many of which are beyond our control.

If we are unable to generate sufficient cash flow to service the debt service requirements under our debt instruments, we may be forced to take remedial actions such as:

• restructuring or refinancing our debt;

• seeking additional debt or equity capital;

• reducing or delaying our business activities, acquisitions, investments or capital expenditures, including research and development expenditures; or

• selling assets, businesses, products or other potential revenue streams.

Such measures might not be successful and might not enable us to service our debt obligations. In addition, any such financing, refinancing or sale of assets might not be available on economically favorable terms, if at all.

A breakdown or breach of our information technology systems and cyber security efforts could subject us to liability, reputational damage or interrupt the operation of our business.

We rely upon our information technology systems and infrastructure for our business. The size and complexity of our computer systems make them potentially vulnerable to breakdown and unauthorized intrusion. We could also experience a business interruption, theft of confidential information, or reputational damage from industrial espionage attacks, malware or other cyber attacks, which may compromise our system infrastructure or lead to data leakage, either internally or at our third-party providers. Similarly, data privacy breaches by those who access our systems may pose a risk that sensitive data, including intellectual property, trade secrets or personal information belonging to us, our patients, employees, customers or other business partners, may be exposed to unauthorized persons or to the public. There can be no assurance that our efforts to protect our data and information technology systems will prevent breakdowns or breaches in our systems that could adversely affect our business and result in financial and reputational harm to us, legal claims or proceedings, liability under laws that protect the privacy of personal information, and regulatory penalties.

The illegal distribution and sale by third parties of counterfeit versions of our products or stolen products could have a negative impact on our reputation and business.

Third parties might illegally distribute and sell counterfeit or unfit versions of our products, which do not meet our rigorous manufacturing and testing standards. A patient who receives a counterfeit or unfit drug may be at risk for a number of dangerous health consequences. Our reputation and business could suffer harm as a result of counterfeit or unfit drugs sold under our brand name. In addition, thefts of inventory at warehouses, plants or while in-transit, which are not properly stored and which are sold through unauthorized channels, could adversely impact patient safety, our reputation and our business.

We have certain charter and by-law provisions that may deter a third-party from acquiring us and may impede the stockholders’ ability to remove and replace our management or board of directors.

Our board of directors has the authority to issue, at any time, without further stockholder approval, up to 5.0 million shares of preferred stock and to determine the price, rights, privileges and preferences of those shares. An issuance of preferred stock could discourage a third-party from acquiring a majority of our outstanding voting stock. Additionally, our by-laws contain provisions intended to strengthen the board’s position in the event of a hostile takeover attempt. These provisions could impede the stockholders’ ability to remove and replace our management and/or board of directors. Furthermore, we are subject to the provisions of Section 203 of the Delaware General Corporation Law, an anti-takeover law, which may also dissuade a potential acquirer of our common stock.

In addition to the risks relating to our common stock, holders of our CVRs are subject to additional risks.

On October 15, 2010, we acquired all of the outstanding common stock of Abraxis BioScience, Inc. (Abraxis) and in connection with our acquisition, contingent value rights (CVRs) were issued entitling each holder of a CVR to a pro rata portion of certain milestone and net sales payments if certain specified conditions are satisfied. In addition to the risks relating to our common stock, CVR holders are subject to additional risks, including:

28

• an active public market for the CVRs may not continue to exist or the CVRs may trade at low volumes, both of which could have an adverse effect on the market price of the CVRs;

• if the clinical approval milestones or net sales targets specified in the CVR Agreement are not achieved within the time periods specified, no payment will be made and the CVRs will expire valueless;

• since the U.S. federal income tax treatment of the CVRs is unclear, any part of a CVR payment could be treated as ordinary income and the tax thereon may be required to be paid prior to the receipt of the CVR payment;

• any payments in respect of the CVRs are subordinated to the right of payment of certain of our other indebtedness;

• we may under certain circumstances redeem the CVRs; and

• upon expiration of our obligations under the CVR Agreement to continue to commercialize ABRAXANE^® or any of the other Abraxis pipeline products, we may discontinue such efforts, which would have an adverse effect on the value of the CVRs.

ITEM 1B.    UNRESOLVED STAFF COMMENTS

None.

29

ITEM 2.    PROPERTIES

Our corporate headquarters are located in Summit, New Jersey and our international headquarters are located in Boudry, Switzerland. Summarized below are the locations, primary usage and approximate square footage of the facilities we own worldwide:

Location	Primary Usage	Approximate Square Feet
Summit, New Jersey	Administration, marketing, research	1,880,000
Boudry, Switzerland	Manufacturing, administration and warehousing	269,000
Phoenix, Arizona	Manufacturing and warehousing	254,000
Zofingen, Switzerland	Manufacturing	8,100

We occupy the following facilities, located in the United States, under operating lease arrangements, none of which are individually material to us. Under these lease arrangements, we may be required to reimburse the lessors for real estate taxes, insurance, utilities, maintenance and other operating costs. All leases are with unaffiliated parties.

Location	Primary Usage	Approximate Square Feet
Berkeley Heights, New Jersey	Office space	347,000
San Diego, California	Research	274,800
Warren, New Jersey	Office space and research	177,600
Basking Ridge, New Jersey	Office space	95,800
San Francisco, California	Office space and research	55,800
Durham, North Carolina	Clinical trial management	36,000
Overland Park, Kansas	Office space	29,600
Seattle, Washington	Research	27,400
Cedar Knolls, New Jersey	Office space and stem cell recovery	25,300
Bedford, Massachusetts	Office space	23,000
Los Angeles, California	Office space	9,800
Washington, D.C.	Office space	3,500
Dallas, Texas	Office space	3,000
Destin, Florida	Office space	1,600

In October 2015, we completed the purchase of real property in Summit, New Jersey that includes 12 buildings. The site has approximately 850,000 square feet of administrative office space and 450,000 square feet of R&D space.

The purchase of the Summit New Jersey campus together with the construction of an 180,000 square foot addition at our global headquarters will enable us to consolidate our New Jersey operations into our two Summit, New Jersey campuses. We expect to incur restructuring expenses associated with the relocation of operations into the two campuses during 2016.

We also lease a number of offices under various lease agreements outside of the United States for which the minimum annual rents may be subject to specified annual rent increases. At December 31, 2015, the non-cancelable lease terms for our operating leases expire at various dates between 2016 and 2025 and in some cases include renewal options. The total amount of rent expense recorded for all leased facilities in 2015 was $54.4 million.

ITEM 3.    LEGAL PROCEEDINGS

See Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

ITEM 4.    MINE SAFETY DISCLOSURES

Not applicable.

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PART II

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

(a)   MARKET INFORMATION

Our common stock is traded on the NASDAQ Global Select Market under the symbol "CELG." The following table sets forth, for the periods indicated, the intra-day high and low prices per share of common stock on the NASDAQ Global Select Market:

	High*		Low*
2015:
Fourth Quarter	$	128.39	$	105.67
Third Quarter	140.72		92.98
Second Quarter	121.47		106.45
First Quarter	129.06		109.46
2014:
Fourth Quarter	$	119.84	$	83.16
Third Quarter	96.50		82.90
Second Quarter	87.37		66.85
First Quarter	87.33		69.51

*adjusted to reflect the two-for-one common stock split effected in June 2014.

	Cumulative Total Return
	12/10		12/11		12/12		12/13		12/14		12/15
Celgene Corporation	$	100.00	$	114.31	$	132.69	$	285.71	$	378.29	$	405.01
S&P 500	100.00		102.09		118.31		156.21		177.32		179.76
NASDAQ Composite	100.00		99.23		116.80		163.38		187.42		200.70
NASDAQ Biotechnology	100.00		112.06		148.73		246.78		331.57		370.60

* $100 Invested on 12/31/10 in Stock or Index – Including Reinvestment of Dividends, Fiscal Year Ended December 31.

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(b)   HOLDERS

The closing sales price per share of common stock on the NASDAQ Global Select Market on February 5, 2016 was $97.89. As of February 5, 2016, there were approximately 426 holders of record of our common stock.

(c)   DIVIDEND POLICY

We have never declared or paid any cash dividends on our common stock and have no present intention to pay a cash dividend on our common stock.

(d)   EQUITY COMPENSATION PLAN INFORMATION

We incorporate information regarding the securities authorized for issuance under our equity compensation plan into this section by reference from the section entitled "Equity Compensation Plan Information" to be included in the proxy statement for our 2016 Annual Meeting of Stockholders.

(e)   REPURCHASE OF EQUITY SECURITIES

From April 2009 through December 2015, our Board of Directors approved purchases of up to $17.500 billion of our common stock, including $4.000 billion approved by our Board of Directors in June 2015. Approved amounts exclude share purchase transaction fees.

The following table presents the number of shares purchased during the three-month period ended December 31, 2015, the average price paid per share, the number of shares that were purchased and the dollar value of shares that still could have been purchased, pursuant to our repurchase authorization:

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares That Still Could Be Purchased Under the Plans or Programs
October 1 - October 31	1,775,498	$	115.37	1,775,498	$	4,092,534,083
November 1 - November 30	930,952	$	111.85	930,952	$	3,988,405,656
December 1 - December 31	897,534	$	109.77	897,534	$	3,889,885,769
	3,603,984	$	113.07	3,603,984

During the three-month period ended December 31, 2015, we purchased 3.6 million shares of common stock under the share repurchase program at a cost of $407.5 million, excluding commissions. As of December 31, 2015, we had a remaining purchase authorization of $3.890 billion.

During the period covered by this report, we did not sell any of our equity shares that were not registered under the Securities Act of 1933, as amended.

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ITEM 6.    SELECTED FINANCIAL DATA

The following Selected Consolidated Financial Data should be read in conjunction with our Consolidated Financial Statements and the related Notes thereto, Management's Discussion and Analysis of Financial Condition and Results of Operations and other financial information included in this Annual Report on Form 10-K. The data set forth below with respect to our Consolidated Statements of Income for the years ended December 31, 2015, 2014 and 2013 and the Consolidated Balance Sheet data as of December 31, 2015 and 2014 are derived from our Consolidated Financial Statements which are included in this Annual Report on Form 10-K and are qualified by reference to such Consolidated Financial Statements and related Notes thereto. The data set forth below with respect to our Consolidated Statements of Income for the years ended December 31, 2012 and 2011 and the Consolidated Balance Sheet data as of December 31, 2013, 2012 and 2011 are derived from our Consolidated Financial Statements, which are not included in this Annual Report on Form 10-K (amounts in millions, except per share data).

	Years ended December 31,
	2015			2014			2013			2012			2011
Consolidated Statements of Income:
Total revenue	$	9,256.0		$	7,670.4		$	6,493.9		$	5,506.7		$	4,842.1
Costs and operating expenses	7,001.4			5,151.4			4,685.0			3,760.3			3,399.4
Operating income	2,254.6			2,519.0			1,808.9			1,746.4			1,442.7
Interest and investment income, net	31.1			28.2			22.0			15.3			25.9
Interest (expense)	(310.6		)	(176.1		)	(91.6		)	(63.2		)	(42.7		)
Other income (expense), net	48.4			(43.7		)	(73.9		)	(17.0		)	(6.4		)
Income before income taxes	2,023.5			2,327.4			1,665.4			1,681.5			1,419.5
Income tax provision	421.5			327.5			215.5			225.3			102.1
Net income	$	1,602.0		$	1,999.9		$	1,449.9		$	1,456.2		$	1,317.4
Less: Net loss attributable to non-controlling interests	—			—			—			—			0.7
Net income attributable to Celgene	$	1,602.0		$	1,999.9		$	1,449.9		$	1,456.2		$	1,318.1
Net income per share attributable to Celgene:*
Basic	$	2.02		$	2.49		$	1.75		$	1.69		$	1.45
Diluted	$	1.94		$	2.39		$	1.68		$	1.65		$	1.42
Weighted average shares:*
Basic	792.2			802.7			827.7			861.9			910.7
Diluted	824.9			836.0			860.6			881.6			925.5

	As of December 31,
	2015		2014		2013		2012		2011
Consolidated Balance Sheets Data:
Cash, cash equivalents and marketable securities	$	6,551.9	$	7,546.7	$	5,687.0	$	3,900.3	$	2,648.2
Total assets	27,053.4		17,340.1		13,378.2		11,734.3		10,005.9
Short-term borrowings and current portion of long-term debt	—		605.9		544.8		308.5		526.7
Long-term debt, net of discount	14,250.4		6,265.7		4,196.5		2,771.3		1,275.6
Retained earnings	8,074.4		6,472.4		4,472.5		3,022.6		1,566.4
Total equity	5,919.0		6,524.8		5,589.9		5,694.5		5,512.7

*adjusted to reflect the two-for-one common stock split effected in June 2014.

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ITEM 7.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

EXECUTIVE SUMMARY

Celgene Corporation, together with its subsidiaries (collectively “we,” “our,”  “us,” “Celgene” or the “Company”), is an integrated global biopharmaceutical company engaged primarily in the discovery, development and commercialization of innovative therapies for the treatment of cancer and inflammatory diseases through next-generation solutions in protein homeostasis, immuno-oncology, epigenetics, immunology and neuro-inflammation. Celgene Corporation was incorporated in the State of Delaware in 1986.

Our primary commercial stage products include REVLIMID^®, POMALYST^®/IMNOVID^®, ABRAXANE^®,OTEZLA^®, VIDAZA^®, azacitidine for injection (generic version of VIDAZA^®),THALOMID^® (sold as THALOMID^® or Thalidomide Celgene^TM outside of the U.S.), and ISTODAX^®.In addition, we earn revenue through licensing arrangements.

We continue to invest substantially in research and development in support of multiple ongoing proprietary clinical development programs which support our existing products and pipeline of new drug candidates. Our clinical trial activity includes trials across the disease areas of hematology, oncology, and inflammation and immunology. REVLIMID^® is in several phase III trials covering a range of hematological malignancies that include multiple myeloma, lymphomas, chronic lymphocytic leukemia (CLL) and myelodysplastic syndromes (MDS). POMALYST^®/IMNOVID^® was approved in the United States and the European Union (EU) for indications in multiple myeloma based on phase II and phase III trial results, respectively, and an additional phase III trial is underway with POMALYST^®/IMNOVID^® in relapsed and refractory multiple myeloma. In solid tumors, ABRAXANE^® is currently in various stages of investigation for breast, pancreatic and non-small cell lung cancers. In inflammation and immunology, OTEZLA^® is being evaluated in phase III trials for Behçet's disease and expanded indications in psoriatic arthritis and plaque psoriasis. We also have a growing number of potential products in phase III trials across multiple diseases. In the inflammation and immunology therapeutic area, we have phase III trials underway for ozanimod in ulcerative colitis (UC) and relapsing multiple sclerosis (RMS) and for GED-0301 in Crohn’s disease. In hematology, phase III trials are underway for CC-486 in MDS and acute myeloid leukemia (AML), for AG-221 in AML, and for luspatercept in MDS.

On August 27, 2015, we acquired all of the outstanding common stock of Receptos, Inc. (Receptos) which resulted in Receptos becoming our wholly owned subsidiary. Receptos' lead drug candidate, ozanimod, is a small molecule that modulates sphingosine 1-phosphate 1 and 5 receptors and it is in development for immune-inflammatory indications, including inflammatory bowel disease and RMS.

The acquisition of Receptos also included other pipeline and pre-clinical stage compounds. In clinical trial results, ozanimod demonstrated several areas of potential advantage over existing oral therapies for the treatment of UC and RMS, including its cardiac, hepatotoxicity and lymphocyte recovery profile. The phase III TRUE NORTH trial in UC is currently underway with data expected in 2018. The phase III RADIANCE and SUNBEAM RMS trials are ongoing and data are expected in the first half of 2017. See Note 2 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K for more information related to our acquisition of Receptos.

Beyond our phase III programs, we have access to a growing early-to-mid-stage pipeline of novel potential therapies to address significant unmet medical needs that consists of new drug candidates and cell therapies developed in-house, licensed from other companies or able to be optioned from collaboration partners. We believe that continued use of our primary commercial stage products, participation in research and development collaboration arrangements, depth of our product pipeline, regulatory approvals of new products and expanded use of existing products will provide the catalysts for future growth.

34

The following table summarizes total revenue and earnings for the years ended December 31, 2015, 2014 and 2013 (dollar amounts in millions, except per share data):

							% Change
	Years Ended December 31,						2015 versus 2014		2014 versus 2013
	2015		2014		2013
Total revenue	$	9,256.0	$	7,670.4	$	6,493.9	20.7	%	18.1	%
Net income	$	1,602.0	$	1,999.9	$	1,449.9	(19.9	)%	37.9	%
Diluted earnings per share*	$	1.94	$	2.39	$	1.68	(18.8	)%	42.3	%

* 2013 diluted earnings per share adjusted to reflect the two-for-one common stock split effected in June 2014.

Revenue increased by $1.586 billion in 2015 compared to 2014 primarily due to the continued growth in sales of REVLIMID^®, OTEZLA^®, and POMALYST^®/IMNOVID^®.OTEZLA^® was approved by the FDA in March 2014 for the treatment of adult patients with active psoriatic arthritis and in September 2014 for the treatment of patients with moderate to severe plaque psoriasis who are candidates for phototherapy or systemic therapy. In January 2015, OTEZLA^® was approved by the European Commission (EC) for the treatment of both psoriasis and psoriatic arthritis in certain adult patients. We began recognizing revenue related to OTEZLA^® during the second quarter of 2014. The $397.9 million decrease in net income and $0.45 decrease in diluted earnings per share in 2015 as compared to 2014 were primarily due to higher research and development collaboration related expenses, which included upfront expenses of $575.1 million, $450.0 million, and $149.8 million for our collaborations with Juno Therapeutics, Inc. (Juno), AstraZeneca PLC (AstraZeneca) and Nurix Inc. (Nurix), respectively, as well as $400.4 million of expenses associated with the acquisition and operations of Receptos. The increased collaboration and acquisition related expenses in 2015 were partly offset by higher net product sales as well as an $85.9 million realized gain on the sale of our equity investment in Flexus Biosciences, Inc. in April 2015.

Results of Operations:

Fiscal Years Ended December 31, 2015, 2014 and 2013

Total Revenue:    Total revenue and related percentages by product for the years ended December 31, 2015, 2014 and 2013 were as follows (dollar amounts in millions):

							% Change
	2015		2014		2013		2015 versus 2014		2014 versus 2013
Net product sales:
REVLIMID®	$	5,801.1	$	4,980.0	$	4,280.3	16.5	%	16.3	%
ABRAXANE®	967.5		848.2		648.9		14.1	%	30.7	%
POMALYST®/IMNOVID®	983.3		679.7		305.4		44.7	%	122.6	%
OTEZLA®	471.7		69.8		—		N/M		N/M
VIDAZA®	590.7		611.9		803.3		(3.5	)%	(23.8	)%
azacitidine for injection	83.9		78.2		23.3		7.3	%	235.6	%
THALOMID®	185.4		221.2		244.5		(16.2	)%	(9.5	)%
ISTODAX®	69.1		65.6		54.0		5.3	%	21.5	%
Other	8.4		9.2		2.6		(8.7	)%	253.8	%
Total net product sales	$	9,161.1	$	7,563.8	$	6,362.3	21.1	%	18.9	%
Other revenue	94.9		106.6		131.6		(11.0	)%	(19.0	)%
Total revenue	$	9,256.0	$	7,670.4	$	6,493.9	20.7	%	18.1	%

N/M - Not meaningful

The increase in total revenue of $1.586 billion in 2015 compared to 2014 reflected increases of $1.121 billion, or 25.0%, in the United States, and $464.4 million, or 14.6%, in international markets. The increase in total revenue of $1.177 billion in 2014

35

compared to 2013 reflected increases of $620.7 million, or 16.1%, in the United States, and $555.8 million, or 21.1%, in international markets.

Net Product Sales: Total net product sales for 2015 increased by $1.597 billion, or 21.1%, to $9.161 billion compared to 2014. The increase was comprised of net volume increases of $1.467 billion and net price increases of $239.8 million, offset in part by a $109.4 million unfavorable foreign exchange impact, including the impact of foreign exchange hedging activity. The increase in volume was driven by increased unit sales of REVLIMID^®, OTEZLA^®, POMALYST^®/IMNOVID^®, and ABRAXANE^®, partly offset by a decrease in unit sales of THALOMID^®. The price increases were primarily attributable to price increases in the U.S. market.

Total net product sales for 2014 increased by $1.202 billion, or 18.9%, to $7.564 billion compared to 2013. The increase was comprised of net volume increases of $999.9 million and net price increases of $213.9 million, offset slightly by a $12.3 million unfavorable foreign exchange impact, including the impact of foreign exchange hedging activity. The increase in volume was driven by increased unit sales of REVLIMID^®, POMALYST^®/IMNOVID^®, ABRAXANE^® and OTEZLA^®, partly offset by a decrease in unit sales of VIDAZA^® resulting from the September 2013 introduction of a generic version of VIDAZA^® in the U.S. by a third party. The increase in price was primarily attributable to price increases in the U.S. market.

REVLIMID^® net sales increased by $821.1 million, or 16.5%, to $5.801 billion in 2015 compared to 2014, primarily due to increased unit sales in both U.S. and international markets in addition to price increases in the U.S. market. Increases in market penetration and treatment duration of patients using REVLIMID^® in multiple myeloma contributed to the increase in U.S. unit sales. The growth in international markets resulted from volume increases, primarily driven by increased duration of use and market share gains. Launch activities in the U.S. and EU for the Newly Diagnosed Multiple Myeloma indication, which was approved in both the U.S. and the EU in February 2015, continued throughout 2015.

Net sales of REVLIMID^® increased by $699.7 million, or 16.3%, to $4.980 billion in 2014 compared to 2013, primarily due to increased unit sales in both U.S. and international markets in addition to price increases in the U.S. market. Increases in market penetration and treatment duration of patients using REVLIMID^® in multiple myeloma contributed to the increase in U.S. unit sales. The growth in international markets resulted from volume increases, primarily driven by increased duration of use and market share gains.

ABRAXANE^® net sales increased by $119.3 million, or 14.1%, to $967.5 million in 2015 compared to 2014, primarily due to increased unit volumes in both the U.S. and international markets reflecting increased acceptance of the product for the treatments of both metastatic adenocarcinoma of the pancreas and non-small cell lung cancer (NSCLC). ABRAXANE^® was approved for the treatment of locally advanced or metastatic NSCLC, as first-line treatment in combination with carboplatin, in patients who are not candidates for curative surgery or radiation therapy in the European Union in March 2015. ABRAXANE^® was approved for the treatment of metastatic adenocarcinoma of the pancreas in the United States in September 2013 and the European Union in December 2013.

Net sales of ABRAXANE^® increased by $199.3 million, or 30.7%, to $848.2 million in 2014 compared to 2013, primarily due to increased unit volumes in both the U.S. and international markets reflecting increased acceptance of the product for the treatments of both metastatic adenocarcinoma of the pancreas and NSCLC.

POMALYST^®/IMNOVID^® net sales increased by $303.6 million, or 44.7%, to $983.3 million in 2015 compared to 2014, reflecting net sales of $591.8 million in the United States and $391.5 million in international markets. Increases in market share and treatment duration contributed to the increase in U.S. and international net sales of POMALYST^®/IMNOVID^®. The finalization of access, pricing and reimbursement in additional countries also continues to contribute to the growth of POMALYST^®/IMNOVID^® net sales in international markets. POMALYST^® was approved by the FDA in February 2013 for patients with multiple myeloma who have received at least two prior therapies, including lenalidomide and bortezomib, and have demonstrated disease progression on or within 60 days of completion of the last therapy. IMNOVID^® (the non-U.S. trade name) in combination with dexamethasone was approved by the EC in August 2013 for adult patients with relapsed and refractory multiple myeloma who have received at least two prior therapies, including both lenalidomide and bortezomib, and have demonstrated disease progression on the last therapy.

Net sales of POMALYST^®/IMNOVID^® increased by $374.3 million, or 122.6%, to $679.7 million in 2014 compared to 2013, primarily due to increased unit sales in both U.S. and international markets, reflecting increases in market penetration.

OTEZLA^® net sales increased by $401.9 million to $471.7 million in 2015 compared to 2014, reflecting net sales of $440.0 million in the United States and $31.7 million in international markets. OTEZLA^® net sales were $69.8 million for 2014, primarily from sales in the United States. OTEZLA^® was approved by the FDA in March 2014 for the treatment of adult patients with active psoriatic arthritis and in September 2014 for the treatment of patients with moderate to severe plaque psoriasis who are candidates for phototherapy or systemic therapy. OTEZLA^® was approved for plaque psoriasis and psoriatic arthritis in the European Union

36

in January 2015. Launch activities for OTEZLA^® commenced in March 2014 and we began recognizing revenue related to OTEZLA^® during the second quarter of 2014.

VIDAZA^® net sales decreased by $21.2 million, or 3.5%, to $590.7 million in 2015 compared to 2014, primarily due to a $21.6 million decrease in U.S. sales resulting from the September 2013 introduction of a generic version of VIDAZA^® by a competitor, which was partly offset by volume increases in international markets.

Net sales of VIDAZA^® decreased by $191.4 million, or 23.8%, to $611.9 million in 2014 compared to 2013, primarily due to a $232.7 million decrease in the U.S. market resulting from the September 2013 introduction of a generic version of VIDAZA^® by a competitor. The decrease in U.S. sales was partly offset by volume increases in international markets. VIDAZA^® retains orphan drug exclusivity in Europe through the end of 2019.

Azacitidine for injection net sales increased by $5.7 million, or 7.3%, to $83.9 million in 2015 compared to 2014, primarily due to increased unit sales to Sandoz AG, which were partly offset by price decreases. Azacitidine for injection is a generic version of VIDAZA^® supplied by us to Sandoz AG beginning in the fourth quarter of 2013. Net sales of azacitidine for injection were $78.2 million in 2014.

THALOMID^® net sales decreased by $35.8 million, or 16.2%, to $185.4 million in 2015 compared to 2014, primarily resulting from lower unit volumes and price decreases in both U.S. and international markets.

Net sales of THALOMID^® decreased by $23.3 million, or 9.5%, to $221.2 million for 2014 compared to 2013, primarily resulting from lower unit volumes in the U.S. and international markets, partly offset by U.S. price increases.

ISTODAX^® net sales increased by $3.5 million, or 5.3%, to $69.1 million for 2015 compared to 2014, primarily due to an increase in unit sales.

Net sales of ISTODAX^® increased by $11.6 million, or 21.5%, to $65.6 million in 2014 compared to 2013, primarily due to an increase in unit sales.

The "other" net product sales category, which includes sales of FOCALIN^®, decreased by $0.8 million, to $8.4 million in 2015 compared to 2014. The "other" net product sales category increased by $6.6 million to $9.2 million in 2014 compared to 2013.

Other Revenue: Other revenue decreased by $11.7 million to $94.9 million for 2015 compared to 2014 primarily due to a $14.1 million decrease in royalty revenue. The decrease in royalty revenue was driven by lower royalties earned from Novartis based on its sales of FOCALIN XR^® and RITALIN^®, which have both been negatively impacted by generic competition in certain markets and we expect that trend to accelerate further in 2016. Generic competition entered the market in the United States for certain strengths of FOCALIN XR^® in the fourth quarter of 2013.

Other revenue decreased by $25.0 million to $106.6 million for 2014 compared to 2013 primarily due to a $24.1 million decrease in royalty revenue. The decrease in royalty revenue was driven by lower royalties earned from Novartis based on its sales of FOCALIN XR^® and RITALIN^®, which have both been negatively impacted by generic competition in certain markets.

Gross to Net Sales Accruals: We record gross to net sales accruals for sales returns and allowances, sales discounts, government rebates, chargebacks and distributor service fees.

REVLIMID^®, POMALYST^® and THALOMID^® are distributed in the United States primarily through contracted pharmacies under the REVLIMID^® Risk Evaluation and Mitigation Strategy (REMS), POMALYST REMS^TM and THALOMID REMS^TM programs, respectively. These are proprietary risk-management distribution programs tailored specifically to provide for the safe and appropriate distribution and use of REVLIMID^®, POMALYST^® and THALOMID^®.Internationally, REVLIMID^®, THALOMID^®/Thalidomide Celgene^TM and IMNOVID^® are distributed under mandatory risk-management distribution programs tailored to meet local authorities’ specifications to provide for the product’s safe and appropriate distribution and use. These programs may vary by country and, depending upon the country and the design of the risk-management program, the product may be sold through hospitals or retail pharmacies. VIDAZA^®, ABRAXANE^®, ISTODAX^® and OTEZLA^® are distributed through the more traditional pharmaceutical industry supply chain and are not subject to the same risk-management distribution programs as REVLIMID^®, POMALYST^®/IMNOVID^® and THALOMID^®/Thalidomide Celgene^TM.

We base our sales returns allowance on estimated on-hand retail/hospital inventories, measured end-customer demand as reported by third-party sources, actual returns history and other factors, such as the trend experience for lots where product is still being returned or inventory centralization and rationalization initiatives conducted by major pharmacy chains, as applicable. If the historical data we use to calculate these estimates do not properly reflect future returns, then a change in the allowance would be

37

made in the period in which such a determination is made and revenues in that period could be materially affected. Under this methodology, we track actual returns by individual production lots. Returns on closed lots, that is, lots no longer eligible for return credits, are analyzed to determine historical returns experience. Returns on open lots, that is, lots still eligible for return credits, are monitored and compared with historical return trend rates. Any changes from the historical trend rates are considered in determining the current sales return allowance. As noted above, REVLIMID^®, POMALYST^®/IMNOVID^® and THALOMID^®/Thalidomide Celgene^TM are distributed primarily through hospitals and contracted pharmacies, which are typically subject to tighter controls of inventory quantities within the supply channel and, thus, resulting in lower returns activity.

Sales discount accruals are based on payment terms extended to customers.

Government rebate accruals are based on estimated payments due to governmental agencies for purchases made by third parties under various governmental programs. U.S. Medicaid rebate accruals are generally based on historical payment data and estimates of future Medicaid beneficiary utilization applied to the Medicaid unit rebate formula established by the Center for Medicaid and Medicare Services. The Medicaid rebate percentage was increased and extended to Medicaid Managed Care Organizations in March 2010. The accrual of the rebates associated with Medicaid Managed Care Organizations is calculated based on estimated historical patient data related to Medicaid Managed Care Organizations. We also analyze actual billings received from the states to further support the accrual rates. Subsequent to implementation of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, the 2010 U.S. Health Care Reform Law), certain states have not completed their Medicaid Managed Care Organization billing for the years of 2010 through 2015. Our accruals for these Medicaid Managed Care Organization rebates had been at elevated levels given the delays in the receipt of complete invoices from certain states. Due to the receipt of more complete claims data during 2013, 2014 and 2015, the accruals for certain states were reduced from these elevated levels as a result of both payments being applied to the accrual during 2013, 2014 and 2015 and changes in estimate of the ultimate obligation during the fourth quarters of 2013, 2014 and 2015. We will continue to adjust the rebate accruals as more information becomes available and to reflect actual claims experience. Manufacturers of pharmaceutical products are responsible for 50% of the patient’s cost of branded prescription drugs related to the Medicare Part D Coverage Gap. In order to estimate the cost to us of this coverage gap responsibility, we analyze data for eligible Medicare Part D patients against data for eligible Medicare Part D patients treated with our products as well as the historical invoices. This expense is recognized throughout the year as costs are incurred. In certain international markets government-sponsored programs require rebates to be paid based on program specific rules and, accordingly, the rebate accruals are determined primarily on estimated eligible sales.

Rebates or administrative fees are offered to certain wholesale customers, group purchasing organizations and end-user customers, consistent with pharmaceutical industry practices. Settlement of rebates and fees may generally occur from one to 15 months from the date of sale. We record a provision for rebates at the time of sale based on contracted rates and historical redemption rates. Assumptions used to establish the provision include level of wholesaler inventories, contract sales volumes and average contract pricing. We regularly review the information related to these estimates and adjust the provision accordingly.

Chargeback accruals are based on the differentials between product acquisition prices paid by wholesalers and lower government contract pricing paid by eligible customers covered under federally qualified programs. Distributor service fee accruals are based on contractual fees to be paid to the wholesale distributor for services provided. TRICARE is a health care program of the U.S. Department of Defense Military Health System that provides civilian health benefits for military personnel, military retirees and their dependents. TRICARE rebate accruals are included in chargeback accruals and are based on estimated Department of Defense eligible sales multiplied by the TRICARE rebate formula.

See Critical Accounting Estimates and Significant Accounting Policies below for further discussion of gross to net sales accruals.

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Gross to net sales accruals and the balance in the related allowance accounts for the years ended December 31, 2015, 2014 and 2013 were as follows (in millions):

	Sales Returns			Discounts			Government Rebates			Chargebacks and Distributor Service Fees			Total
Balance at December 31, 2012	$	13.3		$	11.2		$	125.8		$	61.2		$	211.5
Allowances for sales during prior periods	(1.1		)	—			(27.8		)	(1.9		)	(30.8		)
Allowances for sales during 2013	10.7			74.3			262.1			290.8			637.9
Credits/deductions issued for prior year sales	(3.1		)	(5.2		)	(53.4		)	(42.0		)	(103.7		)
Credits/deductions issued for sales during 2013	(4.3		)	(68.2		)	(172.6		)	(224.9		)	(470.0		)
Balance at December 31, 2013	$	15.5		$	12.1		$	134.1		$	83.2		$	244.9
Allowances for sales during prior periods	(5.4		)	—			(7.1		)	(8.4		)	(20.9		)
Allowances for sales during 2014	7.9			87.9			293.1			382.9			771.8
Credits/deductions issued for prior year sales	(4.1		)	(8.8		)	(78.8		)	(43.3		)	(135.0		)
Credits/deductions issued for sales during 2014	(3.7		)	(79.7		)	(202.8		)	(320.0		)	(606.2		)
Balance at December 31, 2014	$	10.2		$	11.5		$	138.5		$	94.4		$	254.6
Allowances for sales during prior periods	1.0			—			(5.1		)	(3.0		)	(7.1		)
Allowances for sales during 2015	15.3			111.7			423.5			541.6			1,092.1
Credits/deductions issued for prior year sales	(3.9		)	(8.2		)	(77.7		)	(50.6		)	(140.4		)
Credits/deductions issued for sales during 2015	(5.2		)	(102.8		)	(254.1		)	(440.7		)	(802.8		)
Balance at December 31, 2015	$	17.4		$	12.2		$	225.1		$	141.7		$	396.4

A comparison of provisions for allowances for sales within each of the four categories noted above for 2015 and 2014 follows:

2015 compared to 2014: Provisions for sales returns increased by $13.8 million in 2015 compared to 2014, primarily due to a $5.0 million increase in ABRAXANE^® returns reserve allowance related to inventory levels held by certain distributors at the end of 2015. Higher net product sales volumes and elevated returns activity in the U.S. market also resulted in $6.0 million of increases in 2015. In addition, $4.8 million of reductions in returns reserves were recorded in 2014 for the migration of THALOMID^® to specialty pharmacies and for VIDAZA^® inventory levels held at distributors following competition from generic versions of VIDAZA^®. These increases were partially offset by a $2.4 million decrease related to POMALYST^® in 2015 due to lower returns activity.

Discount provisions increased by $23.8 million in 2015 compared to 2014, primarily due to increased sales volumes. The $23.8 million increase consisted of a $24.3 million increase in the United States, which included increases of $13.4 million of cash discounts related to REVLIMID^®, $8.9 million related to OTEZLA^® and $3.0 million related to POMALYST^®. The U.S. increases were partly offset by a $0.5 million decrease related to international cash discounts.

Government rebate provisions increased by $132.4 million in 2015 compared to 2014, primarily due to a $97.9 million increase in international government rebates, due to higher sales volumes and increased rebate rates, and a $26.4 million increase related to Medicaid rebates due to increased sales and Medicaid expansion and a $8.1 million increase in expense related to Medicare Part D Coverage Gap.

Chargebacks and distributor service fees provisions increased by $164.1 million in 2015 compared to 2014. Chargebacks increased by approximately $102.1 million and distributor service fees increased by approximately $62.0 million. The chargeback increases were primarily due to higher sales volumes and a greater portion of sales qualifying for chargeback rebates. The distributor service fee increase was primarily attributable to OTEZLA^®, which launched in April 2014, resulting in an increase of $49.3 million in service fees for 2015.

2014 compared to 2013: Allowances for sales returns decreased by $7.1 million in 2014 compared to 2013, primarily due to a $7.9 million sales returns reserve recorded in 2013 for estimated returns related to the transition of THALOMID^® distribution from retail to specialty pharmacies. Subsequently, during 2014 a $3.5 million reduction in this reserve was recorded due to lower returns experience. This decrease was partially offset by a $2.0 million increase in the returns provision for international markets, a $1.0 million increase in the returns allowance associated with REVLIMID^® due to a higher returns experience in the United

39

States driven by sales volume growth and a net increase of $0.9 million in the VIDAZA^® returns allowance related to inventory levels held by distributors at the end of 2014.

Discounts increased by $13.6 million in 2014 compared to 2013, primarily due to sales increases in the United States.

Government rebates increased by $51.7 million in 2014 compared to 2013, primarily due to a $44.7 million increase in Medicaid rebates and a $17.6 million increase in rebates in certain international markets, both due to increased sales volumes. These increases were partially offset by a $10.6 million decrease in expense related to Medicare Part D Coverage Gap as a result of the refinement of the accrual rates.

Chargebacks and distributor service fees increased by $85.6 million in 2014 compared to 2013. Chargebacks increased by approximately $73.1 million, including a $7.5 million increase related to the TRICARE program driven by higher volume and increased rebate rates. Chargeback increases were primarily due to higher sales volumes and a greater portion of sales qualifying for chargeback rebates. Distributor service fees increased by approximately $12.5 million driven by higher sales volume.

Cost of Goods Sold (excluding amortization of acquired intangible assets): Cost of goods sold and related percentages for the years ended December 31, 2015, 2014 and 2013 were as follows (dollar amounts in millions):

	2015			2014			2013
Cost of goods sold (excluding amortization of acquired intangible assets)	$	420.1		$	385.9		$	340.4
Increase from prior year	$	34.2		$	45.5		$	41.3
Percent increase from prior year	8.9		%	13.4		%	13.8		%
Percent of net product sales	4.6		%	5.1		%	5.4		%

Cost of goods sold (excluding amortization of acquired intangible assets) increased by $34.2 million to $420.1 million in 2015 compared to 2014. The increase was primarily due to the higher level of net product sales. As a percent of net product sales, cost of goods sold (excluding amortization of acquired intangible assets) decreased to 4.6% for 2015 compared to 5.1% for 2014, primarily due to OTEZLA^® and POMALYST^®, which have lower cost, making up a higher percentage of net product sales, while sales of ABRAXANE^® and azacitidine for injection, which have a lower gross margin, made up a lower percentage of net product sales.

Cost of goods sold (excluding amortization of acquired intangible assets) increased by $45.5 million to $385.9 million in 2014 compared to 2013. The increase was primarily due to the higher level of net product sales, partly offset by a $7.8 million reduction in royalty payments, primarily related to sales of REVLIMID^® which resulted from the expiration of our royalty obligations to Children's Medical Center Corporation (CMCC) at the end of February 2013. See Note 18 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K for additional details of our royalty agreement and related litigation with CMCC. As a percent of net product sales, cost of goods sold (excluding amortization of acquired intangible assets) decreased to 5.1% in 2014 compared to 5.4% in 2013, partly due to the elimination of royalty payments to CMCC on our sales of REVLIMID^® as noted above, and the continued growth in net sales of lower cost REVLIMID^®.

Research and Development:    Research and development costs are expensed as incurred and primarily include salary and benefit costs, third-party grants and fees paid to clinical research organizations, supplies and upfront and milestone payments resulting from collaboration arrangements.

Research and development expenses and related percentages for the years ended December 31, 2015, 2014 and 2013 were as follows (dollar amounts in millions):

	2015			2014			2013
Research and development	$	3,697.3		$	2,430.6		$	2,226.2
Increase from prior year	$	1,266.7		$	204.4		$	502.0
Percent increase from prior year	52.1		%	9.2		%	29.1		%
Percent of total revenue	39.9		%	31.7		%	34.3		%

Research and development expenses increased by $1.267 billion to $3.697 billion in 2015, compared to 2014. The increase was primarily due to a $1.024 billion increase in expenses related to collaboration arrangements.

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Research and development expenses increased by $204.4 million to $2.431 billion in 2014 compared to 2013. The increase was primarily due to a $129.2 million impairment charge resulting from an adjustment in the probability-weighted forecasted cash flows related to the CC-292 in-process research and development (IPR&D) intangible asset obtained in the acquisition of Avila Therapeutics, Inc. (Avila) and an increase in activity in support of our early- to mid-stage product pipeline as well as an increase in general research activity. These increases were partly offset by a $141.0 million decrease in expenses related to collaboration arrangements.

The following table provides a breakdown of research and development expenses (in millions):

							Increase (Decrease)
	2015		2014		2013		2015 versus 2014			2014 versus 2013
Human pharmaceutical clinical programs	$	1,005.0	$	837.0	$	825.3	$	168.0		$	11.7
Other pharmaceutical programs	755.2		640.9		526.0		114.3			114.9
Drug discovery and development	384.4		291.4		202.9		93.0			88.5
Cellular therapy	23.6		27.0		25.9		(3.4		)	1.1
Collaboration arrangements	1,529.1		505.1		646.1		1,024.0			(141.0		)
IPR&D impairments	—		129.2		—		(129.2		)	129.2
Total	$	3,697.3	$	2,430.6	$	2,226.2	$	1,266.7		$	204.4

We make significant investments in research and development in support of multiple ongoing proprietary clinical development programs which support both our existing products and pipeline of new drug candidates. See Item 1. "Business" for a table summarizing the current stage of development of both our commercial stage products and new drug candidates. See Note 17 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K for additional details related to certain of our collaboration arrangements.

We do not collect costs on a project basis or for any category of projects for the majority of costs involved in carrying out research projects. While we do perform cost calculations to facilitate our internal evaluation of individual projects, these calculations include significant estimations and allocations that are not relevant to, or included in, our external financial reporting mechanisms. As a consequence, we do not report research and development costs at the project level.

The following table presents significant developments in our phase III clinical trials and regulatory approval requests that occurred during the three-month period ended December 31, 2015, as well as developments that are expected to occur if the future occurrence is material and reasonably certain:

Regulatory agency actions:

Product	Disease Indication	Major Market	Regulatory Agency	Action
VIDAZA®	Expanded indication for the treatment of elderly AML patients who are not eligible for haematopoietic stem cell transplantation and have >30% myeloblasts in their bone marrow	EU	EC	Approval
REVLIMID®	Newly diagnosed multiple myeloma	Japan	MHLW1	Approval
REVLIMID®	Relapsed or refractory mantle cell lymphoma	EU	CHMP2	Positive opinion

¹ Ministry of Health, Labour and Welfare

² European Medicines Agency’s Committee for Medicinal Products for Human Use

In October, we announced that a supplementary new drug application was filed with the FDA for the expanded indication of REVLIMID^® for the treatment of non-del 5q lower risk MDS. The FDA requested additional analyses and data for the submission to further support the risk/benefit assessment of REVLIMID^® in this population. After consideration of the additional efforts involved, we have decided to withdraw the submission at this time.

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Selling, General and Administrative: Selling, general and administrative expenses primarily include salary and benefit costs for employees included in our sales, marketing, finance, legal and administrative organizations, costs related to the launch of new products or those approved for new indications, outside professional services, donations to independent non-profit patient assistance organizations in the United States and facilities costs.

Selling, general and administrative expenses and related percentages for the years ended December 31, 2015, 2014 and 2013 were as follows (dollar amounts in millions):

	2015			2014			2013
Selling, general and administrative	$	2,305.4		$	2,027.9		$	1,684.5
Increase from prior year	$	277.5		$	343.4		$	311.0
Percent increase from prior year	13.7		%	20.4		%	22.6		%
Percent of total revenue	24.9		%	26.4		%	25.9		%

Selling, general and administrative expenses increased by $277.5 million to $2.305 billion for 2015 compared to 2014. The increase was primarily due to increases in expenses associated with our growing organization to support inflammation and immunology products and product candidates, such as OTEZLA^® as well as increases in selling and marketing activities related to recently approved indications for REVLIMID^®, OTEZLA^® and POMALYST^®/IMNOVID^®.

Selling, general and administrative expenses increased by $343.4 million to $2.028 billion in 2014 compared to 2013. The increase was primarily due to an increase in expenses associated with our growing organization to support inflammation and immunology products and product candidates, such as OTEZLA^® and GED-0301, as well as increases in selling and marketing activities related to recently approved indications for OTEZLA^®, POMALYST^®/IMNOVID^® and ABRAXANE^®. The increase also included $25.0 million of expense related to the settlement of a contingent obligation to make matching contributions to The Chan Soon-Shiong Institute for Advanced Health.

Amortization of Acquired Intangible Assets: Amortization of intangible assets acquired as a result of business combinations is summarized below for the years ended December 31, 2015, 2014 and 2013 (in millions):

	2015		2014			2013
Avila	$	47.3	$	47.3		$	47.3
Abraxis	151.8		155.5			160.0
Gloucester	61.5		51.5			51.5
Pharmion	4.0		4.0			4.0
Quanticel	14.4		—			—
Total amortization	$	279.0	$	258.3		$	262.8
Increase (decrease) from prior year	$	20.7	$	(4.5	)	$	68.3

Amortization of acquired intangible assets increased by $20.7 million to $279.0 million in 2015 compared to 2014 primarily due to the amortization of the technology platform asset recorded in the acquisition of Quanticel and an acceleration of amortization expense related to certain Gloucester related intangible assets, partly offset by certain Abraxis related intangibles becoming fully amortized during the first half of 2014.

Amortization of acquired intangible assets decreased by $4.5 million to $258.3 million in 2014 compared to 2013 due to a certain Abraxis related intangible asset becoming fully amortized during the first half of 2014.

Acquisition Related Charges and Restructuring, net: Acquisition related charges and restructuring, net is summarized below for the years ended December 31, 2015, 2014 and 2013 (in millions):

	2015		2014			2013
Acquisition related charges, net	$	289.7	$	48.7		$	171.1
Restructuring charges, net	9.9		—			—
Total	$	299.6	$	48.7		$	171.1
Increase (decrease) from prior year	$	250.9	$	(122.4	)	$	2.1

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Acquisition related charges and restructuring, net increased by $250.9 million to $299.6 million in 2015 compared to 2014. The increase was due to $296.8 million in costs related to the acquisition of Receptos in August 2015, a $28.3 million increase in expense in the current year period related to our contingent liabilities for the Nogra Pharma Limited (Nogra) acquisition, which was acquired in the second quarter of 2014, a $18.7 million reduction in the benefit recorded in the current year period for our contingent liabilities related to the Avila acquisition compared to the prior year period, and $9.9 million of restructuring charges related to our relocation of certain operations into our two Summit, NJ locations as well as costs associated with certain headcount reductions. These increases in expense were partly offset by a $102.6 million reduction in expense in the current year period related to reductions in the fair value of our liability related to publicly traded contingent value rights (CVRs) that were issued as part of the acquisition of Abraxis BioScience, Inc. (Abraxis) in 2010.

Acquisition related charges and restructuring, net decreased by $122.4 million to $48.7 million in 2014 compared to $171.1 million in 2013. The decrease was primarily due to a $122.5 million reduction in expense from the change in fair value of our contingent liabilities related to CVRs that were issued as part of the acquisition of Abraxis and a $75.5 million reduction in expense related to the fair value of our contingent consideration payable to the former shareholders of Avila due to an adjustment to the probability-weighted forecasted cash flows related to CC-292, partly offset by a $75.6 million expense in the current year period for an increase in the fair value of our contingent consideration payable related to the Nogra acquisition which reflects both the passage of time and an increase of $19.8 million related to an increase in the estimated probability of making one of the additional contingent developmental milestone payments.

Interest and Investment Income, Net: Interest and investment income, net is summarized below for the years ended December 31, 2015, 2014 and 2013 (dollar amounts in millions):

	2015			2014			2013
Interest and investment income, net	$	31.1		$	28.2		$	22.0
Increase from prior year	$	2.9		$	6.2		$	6.7
Percentage increase from prior year	10.3		%	28.2		%	43.8		%

Interest and investment income, net increased by $2.9 million to $31.1 million in 2015 compared to 2014 primarily due to lower losses on the sale of marketable securities in 2015 compared to the prior year.

Interest and investment income, net increased by $6.2 million to $28.2 million in 2014 compared to 2013 primarily due to higher investment balances compared to the prior year, a decrease in losses on sales of marketable securities and a decrease in the net amortization expense of premiums and discounts related to marketable securities.

Interest Expense:    Interest expense is summarized below for the years ended December 31, 2015, 2014 and 2013 (dollar amounts in millions):

	2015			2014			2013
Interest expense	$	310.6		$	176.1		$	91.6
Increase from prior year	$	134.5		$	84.5		$	28.4
Percentage increase from prior year	76.4		%	92.2		%	44.9		%

Interest expense increased by $134.5 million to $310.6 million for 2015 compared to 2014 primarily due to interest expense associated with the issuance of $8.000 billion of senior notes in August 2015 and $2.500 billion in May 2014. For more information related to our debt issuances, see “Liquidity and Capital Resources” and Note 11 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

Interest expense increased by $84.5 million to $176.1 million in 2014 compared to 2013 primarily due to interest expense associated with the issuance of $1.500 billion of senior notes in August 2013 and an additional $2.500 billion of senior notes in May 2014.

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Other Income (Expense), Net:    Other income (expense), net is summarized below for the years ended December 31, 2015, 2014 and 2013 (in millions):

	2015			2014			2013
Foreign exchange gains (losses), including foreign exchange derivative instruments not designated as hedging instruments	$	(11.7	)	$	(9.5	)	$	22.2
Fair value adjustments of forward point amounts	23.0			(18.0		)	6.3
Celgene puts sold	(9.9		)	11.6			1.2
Premium paid on equity investment	—			(9.7		)	—
Milestones received	12.0			—			—
Impairment charges	(49.0		)	(4.0		)	(99.2		)
Gain on sale of equity investment in Flexus Bioscienses, Inc.	85.9			—			—
Other	(1.9		)	(14.1		)	(4.4		)
Total other income (expense), net	$	48.4		$	(43.7	)	$	(73.9	)
Increase from prior year	$	92.1		$	30.2		$	(56.9	)

Other income (expense), net was a net income of $48.4 million for 2015 and a net expense of $43.7 million for 2014. The $92.1 million increase in net income was primarily due to a gain on the sale of our equity investment in Flexus and currency fluctuations, partly offset by higher impairment charges incurred in 2015 when compared to 2014.

Other income (expense), net was a net expense of $43.7 million for 2014 and a net expense of $73.9 million for 2013. The $30.2 million decrease in net expense was primarily due to a decrease in impairment charges in 2014 related to certain investments and gains related to the sale of puts on our common stock in 2014. The decrease was partially offset by the impact of foreign exchange losses recorded in the 2014 period compared to gains recorded in the 2013 period. In addition, the 2014 period included an unfavorable change in spreads between forward and spot rates related to foreign exchange contracts compared to a favorable change in spreads between forward and spot rates in the 2013 period.

Income Tax Provision:  The income tax provision increased by $94.0 million to $421.5 million in 2015 compared to 2014 primarily as a result of an increase in the effective tax rate, partially offset by a decrease in income before taxes. The full year 2015 underlying effective tax rate of 20.0% reflects the impact of our global business footprint. The increase in the underlying effective tax rate from 2014 reflects an increase in tax expense resulting from the global mix of funding sources for payments to collaboration partners, primarily the initiation of our collaborations with AstraZeneca and Juno, partially offset by a decrease in tax expense resulting from certain tax deductible expenses incurred in our acquisition of Receptos and a non-recurring tax expense from the launch of new products. The effective tax rate for 2015 was increased by 0.8 percentage points as a result of discrete items, primarily an increase in valuation allowances recorded on certain deferred tax assets, partially offset by certain tax benefits related to our 2014 income tax returns being more favorable than originally estimated and a net decrease in unrecognized tax benefits resulting from expirations of statues of limitations.

The income tax provision increased by $112.0 million to $327.5 million in 2014 compared to 2013 primarily as a result of an increase in income before taxes combined with an increase in the effective tax rate. The full year 2014 underlying effective tax rate of 14.3% reflects the impact of our global business footprint. The increase in the underlying effective tax rate from 2013 reflects a decrease in tax benefits from certain collaboration and acquisition-related items and an increase in tax expense associated with the launch of new products. The effective tax rate for 2014 was decreased by 0.2 percentage points as a result of discrete items, including a net decrease in unrecognized tax benefits resulting from ongoing examinations, settlements with taxing authorities, and expirations of statutes of limitations.

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Net Income: Net income and per common share amounts for the years ended December 31, 2015, 2014 and 2013 were as follows (dollar amounts in millions, except per share data):

	2015		2014		2013
Net income	$	1,602.0	$	1,999.9	$	1,449.9
Per common share amounts:*
Basic	$	2.02	$	2.49	$	1.75
Diluted	$	1.94	$	2.39	$	1.68
Weighted average shares:*
Basic	792.2		802.7		827.7
Diluted	824.9		836.0		860.6

*adjusted to reflect the two-for-one common stock split effected in June 2014.

The $397.9 million decrease in net income to $1.602 billion in 2015 compared to 2014 was primarily due to higher research and development collaboration related expenses, which included upfront expenses of $575.1 million, $450.0 million, and $149.8 million for our collaborations with Juno, AstraZeneca and Nurix, respectively, as well as $400.4 million of expenses associated with the acquisition and operations of Receptos. The increased collaboration and acquisition related expenses in 2015 were partly offset by higher net product sales as well as an $85.9 million realized gain on the sale of our equity investment in Flexus Biosciences, Inc. in April 2015. The $0.45 decrease in diluted earnings per share in 2015 compared to 2014 was favorably impacted by the repurchase of 28.1 million common shares under our common share repurchase program, reducing our outstanding share base.

The $550.0 million increase in net income to $2.000 billion in 2014 compared to 2013 was primarily due to a higher level of net product sales partly offset by an increase in expenses, including a $129.2 million impairment charge for IPR&D, increase in share-based compensation expense, increase in drug discovery and development activities, expenses associated with our growing organization to support inflammation and immunology products and product candidates and an increase in selling and marketing activities primarily related to launch activities in recently approved indications for OTEZLA^®, POMALYST^®/IMNOVID^® and ABRAXANE^®. The $0.71 increase in diluted earnings per share in 2014 compared to 2013 was favorably impacted by the repurchase of 22.0 million common shares under our common share repurchase program, reducing our outstanding share base.

Liquidity and Capital Resources

The following table summarizes the components of our financial condition for the years ended December 31, 2015, 2014 and 2013 (in millions):

							Increase
	2015		2014		2013		2015 versus 2014			2014 versus 2013
Financial assets:
Cash and cash equivalents	$	4,880.3	$	4,121.6	$	3,234.4	$	758.7		$	887.2
Marketable securities available-for-sale	1,671.6		3,425.1		2,452.6		(1,753.5		)	972.5
Total financial assets	$	6,551.9	$	7,546.7	$	5,687.0	$	(994.8	)	$	1,859.7
Debt:
Short-term borrowings and current portion of long-term debt	$	—	$	605.9	$	544.8	$	(605.9	)	$	61.1
Long-term debt, net of discount	14,250.4		6,265.7		4,196.5		7,984.7			2,069.2
Total debt	$	14,250.4	$	6,871.6	$	4,741.3	$	7,378.8		$	2,130.3
Working capital1	$	7,492.6	$	7,617.2	$	5,607.4	$	(124.6	)	$	2,009.8

1 Includes cash, cash equivalents and marketable securities available-for-sale, accounts receivable, net of allowances, inventory and other current assets, less short-term borrowings and current portion of long-term debt, accounts payable, accrued expenses, income taxes payable and other current liabilities.

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We rely primarily on positive cash flows from operating activities, proceeds from sales of available-for-sale marketable securities and borrowings in the form of long-term notes payable and short-term commercial paper to provide for our liquidity requirements. We expect continued growth in our expenditures, particularly those related to research and development, clinical trials, commercialization of new products, international expansion and capital investments. However, we anticipate that existing cash and cash equivalent balances, marketable securities available-for-sale, cash generated from operations and existing sources of and access to financing are adequate to fund our operating needs, capital expenditures, debt service requirements and our plans to repurchase our common stock or pursue other strategic business initiatives for the foreseeable future.

Many of our operations are conducted outside the United States and significant portions of our cash, cash equivalents and marketable securities available-for-sale are held internationally.  As of December 31, 2015, we held approximately $4.488 billion of our cash, cash equivalents and marketable securities available-for-sale in foreign tax jurisdictions. The amount of cash, cash equivalents and marketable securities available-for-sale held in U.S. tax jurisdictions can fluctuate due to the timing of receipts and payments in the ordinary course of business including intercompany transactions, as well as for other reasons, such as repurchases of our common stock, internal reorganizations, business-development activities and debt issuances.  As part of our ongoing liquidity assessments, we regularly monitor the mix of domestic and international cash flows (both inflows and outflows).  Repatriation of overseas funds can result in additional U.S. federal, state and local income tax payments.  We record U.S. deferred tax liabilities for certain unremitted earnings, but when amounts earned overseas are expected to be permanently reinvested outside of the United States, no accrual for U.S. taxes is provided.  Approximately $900.0 million of our foreign earnings, included in the $4.488 billion of short-term funds in foreign tax jurisdictions, may not be required for use in offshore operations and may be available for use in the United States.  These earnings are not treated as permanently reinvested and accordingly, our deferred tax liabilities as of December 31, 2015 and December 31, 2014 included $316.5 million for the estimated U.S. federal and state income taxes that may be incurred should these earnings be repatriated. The remaining foreign earnings are unremitted and expected to be permanently reinvested outside the United States. We do not rely on these earnings as a source of funds for our domestic business as we expect to have sufficient current cash resources combined with future cash flows in the United States to fund our U.S. operational and strategic needs.

Share Repurchase Program: Our Board of Directors approved an aggregate $17.500 billion common stock repurchase program of which we have approximately $3.890 billion remaining for future share repurchases. During 2015, we used $3.257 billion for repurchases of our common stock, measured on a settlement date basis.

Components of Working Capital

Cash, Cash Equivalents and Marketable Securities Available for Sale: We invest our excess cash primarily in money market funds, U.S. Treasury securities, U.S. government-sponsored agency securities, U.S. government-sponsored agency mortgage-backed securities, non-U.S. government agency and supranational securities, global corporate debt securities and asset backed securities. All liquid investments with maturities of three months or less from the date of purchase are classified as cash equivalents and all investments with maturities of greater than three months from the date of purchase are classified as marketable securities available-for-sale. The $994.8 million decrease in cash, cash equivalents and marketable securities available-for-sale at December 31, 2015 compared to 2014 was primarily due to $7.695 billion of payments for the acquisitions of Receptos and Quanticel, net of cash acquired, $3.257 billion of payments under our share repurchase program and $513.9 million for repayments of long-term debt partially offset by $7.913 billion in proceeds from the August 2015 debt issuance of an additional $8.000 billion principal amount of senior notes, $2.484 billion of net cash from operating activities and other activities resulting in net cash proceeds of $73.8 million.

Marketable securities available-for-sale are carried at fair value, held for an unspecified period of time and are intended for use in meeting our ongoing liquidity needs. Unrealized gains and losses on available-for-sale securities, which are deemed to be temporary, are reported as a separate component of stockholders' equity, net of tax. The cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. The amortization, along with realized gains and losses and other than temporary impairment charges, is included in interest and investment income, net. For more information related to the fair value and valuation of our marketable securities, see Note 4 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

Accounts Receivable, Net: Accounts receivable, net increased by $254.2 million to $1.421 billion at December 31, 2015 compared to December 31, 2014 primarily due to increased sales of REVLIMID^®,POMALYST^®/IMNOVID^®, and OTEZLA^®. Sales made outside the United States typically have payment terms that are greater than 60 days, thereby extending collection periods beyond those in the United States. We expect our accounts receivable balance to continue to grow as our international sales continue to expand.

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We continue to monitor economic conditions, including the volatility associated with international economies, the sovereign debt crisis in certain European countries and associated impacts on the financial markets and our business. Our current business model in these markets is typically to sell our products directly to principally government owned or controlled hospitals, which in turn directly deliver critical care to patients. Our products are used to treat life-threatening diseases and we believe this business model enables timely delivery and adequate supply of products. Many of the outstanding receivable balances are related to government-funded hospitals and we believe the receivable balances are ultimately collectible. Similarly, we believe that future sales to these customers will continue to be collectible.

The credit and economic conditions within Spain, Italy, Portugal and Greece, as well as increasing sales levels in those countries have in the past resulted in, and may continue to result in, an increase in the average length of time it takes to collect accounts receivable. Our total net receivables in Spain, Italy and Portugal are composed almost entirely of amounts receivable from government-owned or controlled hospitals and the public sector and amounted to $187.8 million at December 31, 2015 compared to $241.8 million at December 31, 2014. Approximately $31.3 million of the $187.8 million receivable at December 31, 2015 was greater than one year past due. Our exposure to the sovereign debt crisis in Greece is limited, as we do not have a material amount of receivables in Greece. We maintain timely and direct communication with hospital customers in Spain, Italy and Portugal regarding both the current and past due receivable balances. We continue to receive payments from these countries and closely monitor the plans for payment at the regional government level. Payments from customers in these countries are not received on regular intervals and several months could elapse between significant payments. We also regularly request and receive positive confirmation of the validity of our receivables from most of the regional governmental authorities.

In determining the appropriate allowance for doubtful accounts for Spain, Italy and Portugal, we considered the balance of past due receivables related to sales made to government-owned or supported customers. We regularly monitor developments in Europe to assess whether the level of risk of default for any customers has increased and note the ongoing efforts by the European Union, European Monetary Union and International Monetary Fund to support countries with large public deficits and outstanding debt balances. We also monitor the efforts of individual countries to support their regions with large public deficits and outstanding debt balances. We have not experienced significant losses or write-offs with respect to the collection of our accounts receivable in these countries as a result of their economic difficulties and we do not expect to have write-offs or adjustments to accounts receivable that would have a material adverse impact on our financial position or results of operations.

Inventory: Inventory balances increased by $50.3 million to $443.4 million at the end of 2015 compared to 2014. The increase was primarily due to increased demand and an initiative to increase ABRAXANE^® safety stock globally.

Other Current Assets: Other current assets increased by $378.6 million to $984.7 million at the end of 2015 compared to 2014 primarily due to a $137.3 million increase in the fair value of derivative instruments, a $182.1 million increase in prepaid taxes and an $80.9 million net increase in other prepaid accounts primarily attributable to the Receptos research and development activity.

Commercial Paper: We have a commercial paper program (Program) under which we issue unsecured commercial paper notes (Commercial Paper) on a private placement basis, the proceeds of which are used for general corporate purposes. As of December 31, 2015, we had available capacity to issue up to $1.750 billion of Commercial Paper and there were no borrowings under the Program. The maturities of the Commercial Paper may vary, but may not exceed 270 days from the date of issue. The Commercial Paper is sold under customary terms to a dealer or in the commercial paper market and is issued at a discount from par or, alternatively, is sold at par and bears varying interest rates on a fixed or floating basis. Borrowings under the Program are accounted for as short-term borrowings.

Senior Unsecured Credit Facility: We maintain a senior unsecured revolving credit facility (Credit Facility) that provides revolving credit in the aggregate amount of $1.750 billion, which was increased from $1.500 billion in April 2015. Also in April 2015, the term of the Credit Facility was extended from April 18, 2018 to April 17, 2020. Subject to certain conditions, we have the right to increase the amount of the Credit Facility (but in no event more than one time per annum) up to a maximum aggregate amount of $2.000 billion. Amounts may be borrowed in U.S. dollars for general corporate purposes. The Credit Facility currently serves as backup liquidity for our Commercial Paper borrowings. At December 31, 2015, there was no outstanding borrowing against the Credit Facility.

The Credit Facility contains affirmative and negative covenants, including certain customary financial covenants. We were in compliance with all financial covenants as of December 31, 2015. In July 2015, the debt covenants on our existing credit facility were amended in order to accommodate additional borrowing related to our acquisition of Receptos. For more information related to our debt issuance, see Note 11 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

Accounts Payable, Accrued Expenses and Other Current Liabilities: Accounts payable, accrued expenses and other current liabilities increased by $423.4 million to $1.889 billion at the end of 2015 compared to 2014. The increase was primarily due to

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increases of $141.1 million for sales adjustment accruals, $111.2 million for accrued interest expense, $76.3 million for collaboration agreement accruals, $74.9 million for current contingent consideration, $42.2 million for accrued expenses related to Receptos research and development activity, $42.6 million for accounts payable, $35.6 million for compensation related accrued expenses, and $30.7 million from other activity. The increases were offset by a decrease of $131.2 million in deferred taxes.

Income Taxes Payable (Current and Non-Current): Income taxes payable increased by $58.4 million to $344.0 million at the end of 2015 compared to 2014, primarily from the current provision for income taxes of $454.9 million, net deferred intercompany credits of $152.3 million, and an increase in refundable income taxes of $115.6 million, partially offset by income tax payments of $361.1 million, and a tax benefit of share-based compensation of $302.1 million.

Senior Notes: In August 2015, we issued an additional $8.000 billion principal amount of senior notes consisting of $1.000 billion aggregate principal amount of 2.125% Senior Notes due 2018 (the 2018 notes), $1.500 billion aggregate principal amount of 2.875% Senior Notes due 2020 (the 2020 notes), $1.000 billion aggregate principal amount of 3.550% Senior Notes due 2022 (the 2022 notes), $2.500 billion aggregate principal amount of 3.875% Senior Notes due 2025 (the 2025 notes) and $2.000 billion aggregate principal amount of 5.000% Senior Notes due 2045 (the 2045 notes and together with the 2018 notes, the 2020 notes, the 2022 notes, and the 2025 notes, referred to herein as the “2015 issued notes”).

The 2015 issued notes were issued at 99.994%, 99.819%, 99.729%, 99.034%, and 99.691% of par, respectively, and the discount is being amortized as additional interest expense over the period from issuance through maturity. Offering costs of approximately $50.0 million have been recorded as debt issuance costs on our Consolidated Balance Sheets and are being amortized as additional interest expense using the effective interest rate method over the period from issuance through maturity. Interest on the 2015 issued notes is payable semi-annually in arrears on February 15 and August 15 each year beginning February 15, 2016 and the principal on each 2015 issued note is due in full at their respective maturity dates. The 2015 issued notes may be redeemed at our option, in whole or in part; the 2018 notes, the 2020 notes, and the 2022 notes may be redeemed at any time, the 2025 notes and 2045 notes may be redeemed at three months and six months prior to the maturity dates, respectively.

Early redemption would be at a redemption price equaling accrued and unpaid interest plus the greater of 100% of the principal amount of the 2015 issued notes to be redeemed or the sum of the present values of the remaining scheduled payments of interest and principal discounted to the date of redemption on a semi-annual basis plus 20 basis points in the case of the 2018 notes, 20 basis points in the case of the 2020 notes, 25 basis points in the case of the 2022 notes, 30 basis points in the case of the 2025 notes, and 35 basis points in the case of the 2045 notes. If we experience a change of control accompanied by a downgrade of the debt to below investment grade, we will be required to offer to repurchase the 2015 issued notes at a purchase price equal to 101% of their principal amount plus accrued and unpaid interest. We are subject to covenants which limit our ability to pledge properties as security under borrowing arrangements and limit our ability to perform sale and leaseback transactions involving our property.

In 2015, the 2.45% senior notes with a principal amount of $500.0 million matured and were repaid. We also assumed $13.9 million of debt obligations as part of the acquisition of Quanticel in 2015 that were repaid during 2015.

Cash flows from operating, investing and financing activities for the years ended December 31, 2015, 2014 and 2013 were as follows (in millions):

										$ Change
	2015			2014			2013			2015 versus 2014			2014 versus 2013
Net cash provided by operating activities	$	2,483.9		$	2,806.3		$	2,225.9		$	(322.4	)	$	580.4
Net cash used in investing activities	$	(6,259.0	)	$	(1,438.0	)	$	(528.6	)	$	(4,821.0	)	$	(909.4	)
Net cash provided by (used in) financing activities	$	4,584.5		$	(417.4	)	$	(553.7	)	$	5,001.9		$	136.3

Operating Activities: Net cash provided by operating activities decreased by $322.4 million to $2.484 billion in 2015 compared to 2014. The decrease in net cash provided by operating activities was primarily attributable to a decrease in net income of $397.9 million in 2015 compared to 2014 driven by increased research and development collaboration related expenses.

Net cash provided by operating activities increased by $580.4 million to $2.806 billion in 2014 compared to 2013 primarily as a result of an expansion of our operations and a related increase in net earnings.

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Investing Activities: Net cash used in investing activities increased by $4.821 billion in 2015 compared to 2014. The increase in net cash used in investing activities was primarily due to $7.695 billion of payments for the acquisitions of Receptos and Quanticel, net of cash acquired. This was partially offset by net proceeds of $1.910 billion from net sales of marketable securities available-for-sale during 2015 compared with $485.5 million of net purchases of marketable securities available-for-sale during 2014. In addition, $710.0 million was used for the acquisition of Nogra in 2014.

Net cash used in investing activities increased by $909.4 million in 2014 compared to 2013. The increase in net cash used in investing activities was principally related to a cash use of $710.0 million for the Nogra acquisition. In addition, net purchases of marketable securities available-for-sale during 2014 were $144.2 million higher than in 2013.

Financing Activities: Net cash provided by financing activities increased by $5.002 billion in 2015 compared to 2014. The increase in net cash provided by financing activities was primarily attributable to the $5.443 billion increase in proceeds from the issuance of long-term debt partially offset by the $513.9 million re-payment of long-term debt.

Net cash used in financing activities decreased by $136.3 million in 2014 compared to 2013. The decrease was principally related to a $991.0 million increase in proceeds from the issuance of long-term debt in 2014 compared to 2013, partly offset by a $210.5 million increase in payments for the purchase of treasury shares in 2014 compared to 2013 and a net repayment of $445.3 million in short-term borrowing in 2014 compared to a net increase of $234.1 million in short-term borrowing in 2013.

Contractual Obligations

The following table sets forth our contractual obligations as of December 31, 2015 (in millions):

	Payment Due By Period
	Less than 1 Year		1 to 3 Years		3 to 5 Years		More than 5 Years		Total
Senior notes1	$	524.7	$	2,939.9	$	3,458.3	$	15,077.3	$	22,000.2
Operating leases	56.1		83.0		43.7		49.5		232.3
Other contract commitments	143.3		64.0		0.8		—		208.1
Total	$	724.1	$	3,086.9	$	3,502.8	$	15,126.8	$	22,440.6

¹  The senior note obligation amounts include future principal and interest payments for both current and non-current obligations.

Senior Notes: In August 2015, we issued an additional $8.000 billion principal amount of senior notes consisting of $1.000 billion aggregate principal amount of 2.125% Senior Notes due 2018, $1.500 billion aggregate principal amount of 2.875% Senior Notes due 2020, $1.000 billion aggregate principal amount of 3.550% Senior Notes due 2022, $2.500 billion aggregate principal amount of 3.875% Senior Notes due 2025 and $2.000 billion aggregate principal amount of 5.000% Senior Notes due 2045.

In May 2014, we issued a total of $2.500 billion principal amount of senior notes consisting of $500.0 million aggregate principal amount of 2.250% Senior Notes due 2019, $1.000 billion aggregate principal amount of 3.625% Senior Notes due 2024 and $1.000 billion aggregate principal amount of 4.625% Senior Notes due 2044.

In August 2013, we issued a total of $1.500 billion principal amount of senior notes consisting of $400.0 million aggregate principal amount of 2.300% Senior Notes due 2018, $700.0 million aggregate principal amount of 4.000% Senior Notes due 2023 and $400.0 million aggregate principal amount of 5.250% Senior Notes due 2043.

In August 2012, we issued a total of $1.500 billion principal amount of senior notes consisting of $500.0 million aggregate principal amount of 1.90% Senior Notes due 2017, and $1.000 billion aggregate principal amount of 3.25% Senior Notes due 2022.

In October 2010, we issued a total of $1.250 billion principal amount of senior notes consisting of $500.0 million aggregate principal amount of 2.45% Senior Notes which matured and were repaid in 2015, $500.0 million aggregate principal amount of 3.95% Senior Notes due 2020 and $250.0 million aggregate principal amount of 5.7% Senior Notes due 2040.

Operating Leases: We lease office and research facilities under various operating lease agreements in the United States and various international markets. The non-cancelable lease terms for operating leases expire at various dates between 2016 and 2025 and include renewal options. In general, we are also required to reimburse the lessors for real estate taxes, insurance, utilities, maintenance and other operating costs associated with the leases. For more information on the major facilities that we occupy under lease arrangements refer to Part I, Item 2. "Properties" of this Annual Report on Form 10-K.

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Other Contract Commitments: Other contract commitments of $208.1 million as of December 31, 2015 primarily included $183.7 million in contractual obligations related to product supply contracts. In addition, we have committed to invest an aggregate $20.4 million in an investment fund, which is callable at any time, and a remaining $4.0 million balance due in connection with our acquisition of a manufacturing facility in Switzerland.

Collaboration Arrangements:    We have entered into certain research and development collaboration agreements with third parties that include the funding of certain development, manufacturing and commercialization efforts with the potential for future milestone and royalty payments upon the achievement of pre-established developmental, regulatory and/or commercial targets. Our obligation to fund these efforts is contingent upon continued involvement in the programs and/or the lack of any adverse events which could cause the discontinuance of the programs. Due to the nature of these arrangements, the future potential payments related to the attainment of specified development and regulatory approval milestones over a period of several years are inherently uncertain, and accordingly, no amounts have been recorded for these future potential payments in our Consolidated Balance Sheets at December 31, 2015 and 2014 contained in this Annual Report on Form 10-K. Potential milestone payments (not including potential royalty payments) total approximately $3.849 billion, including approximately $3.326 billion contingent on the achievement of various research, development and regulatory approval milestones and approximately $523.1 million in sales-based milestones. For additional information about our collaboration arrangements, see Note 17 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

New Accounting Standards

For a discussion of new accounting standards please see Note 1 of Notes to Consolidated Financial Statements contained in this Annual Report on Form 10-K.

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Critical Accounting Estimates and Significant Accounting Policies

A critical accounting policy is one that is both important to the portrayal of our financial condition and results of operation and requires management's most difficult, subjective or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain. While our significant accounting policies are more fully described in Note 1 of Notes to Consolidated Financial Statements included in this Annual Report on Form 10-K, we believe the following accounting estimates and policies to be critical:

Revenue Recognition: Revenue from the sale of products is recognized when title and risk of loss of the product is transferred to the customer and the sales price is fixed and determinable. Provisions for discounts, early payments, rebates, sales returns and distributor chargebacks under terms customary in the industry are provided for in the same period the related sales are recorded. We record estimated reductions to revenue for volume-based discounts and rebates at the time of the initial sale. The estimated reductions to revenue for such volume-based discounts and rebates are based on the sales terms, historical experience and trend analysis.

We recognize revenue from royalties based on licensees' sales of our products or products using our technologies. Royalties are recognized as earned in accordance with the contract terms when royalties from licensees can be reasonably estimated and collectability is reasonably assured. If royalties cannot be reasonably estimated or collectability of a royalty amount is not reasonably assured, royalties are recognized as revenue when the cash is received.

Gross to Net Sales Accruals: We base our sales returns allowance on estimated on-hand retail/hospital inventories, measured end-customer demand as reported by third-party sources, actual returns history and other factors, such as the trend experience for lots where product is still being returned or inventory centralization and rationalization initiatives conducted by major pharmacy chains, as applicable.  If the historical data we use to calculate these estimates do not properly reflect future returns, then a change in the allowance would be made in the period in which such a determination is made and revenues in that period could be materially affected.  Under this methodology, we track actual returns by individual production lots. Returns on closed lots, that is, lots no longer eligible for return credits, are analyzed to determine historical returns experience. Returns on open lots, that is, lots still eligible for return credits, are monitored and compared with historical return trend rates. Any changes from the historical trend rates are considered in determining the current sales return allowance. REVLIMID^®, POMALYST^®/IMNOVID^® and THALOMID^®/Thalidomide Celgene^TM are distributed primarily through hospitals and contracted pharmacies, which are typically subject to tighter controls of inventory quantities within the supply channel, resulting in lower returns activity.

Sales discount accruals are based on payment terms extended to customers.

Government rebate accruals are based on estimated payments due to governmental agencies for purchases made by third parties under various governmental programs. U.S. Medicaid rebate accruals are generally based on historical payment data and estimates of future Medicaid beneficiary utilization applied to the Medicaid unit rebate formula established by the Center for Medicaid and Medicare Services. The Medicaid rebate percentage was increased and extended to Medicaid Managed Care Organizations in March 2010. The accrual of the rebates associated with Medicaid Managed Care Organizations is calculated based on estimated historical patient data related to Medicaid Managed Care Organizations. We also analyze actual billings received from the states to further support the accrual rates. Subsequent to implementation of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, the 2010 U.S. Health Care Reform Law), certain states have not completed their Medicaid Managed Care Organization billing for the years of 2010 through 2015. Our accruals for these Medicaid Managed Care Organization rebates had been at elevated levels given the delays in the receipt of complete invoices from certain states. Due to the receipt of more complete claims data during 2013, 2014 and 2015, the accruals for certain states were reduced from these elevated levels as a result of both payments being applied to the accrual during 2013, 2014 and 2015 and changes in estimate of the ultimate obligation during the fourth quarters of 2013, 2014 and 2015. We will continue to adjust the rebate accruals as more information becomes available and to reflect actual claims experience.

Manufacturers of pharmaceutical products are responsible for 50% of the patient’s cost of branded prescription drugs related to the Medicare Part D Coverage Gap. In order to estimate the cost to us of this coverage gap responsibility, we analyze data for eligible Medicare Part D patients against data for eligible Medicare Part D patients treated with our products as well as the historical invoices. This expense is recognized throughout the year as costs are incurred. In certain international markets government-sponsored programs require rebates to be paid based on program specific rules and, accordingly, the rebate accruals are determined primarily on estimated eligible sales.

Rebates or administrative fees are offered to certain wholesale customers, group purchasing organizations and end-user customers, consistent with pharmaceutical industry practices. Settlement of rebates and fees may generally occur from one to 15 months from the date of sale. We record a provision for rebates at the time of sale based on contracted rates and historical redemption rates.

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Assumptions used to establish the provision include level of wholesaler inventories, contract sales volumes and average contract pricing. We regularly review the information related to these estimates and adjust the provision accordingly.

Chargeback accruals are based on the differentials between product acquisition prices paid by wholesalers and lower government contract pricing paid by eligible customers covered under federally qualified programs. Distributor service fee accruals are based on contractual fees to be paid to the wholesale distributor for services provided. TRICARE is a health care program of the U.S. Department of Defense Military Health System that provides civilian health benefits for military personnel, military retirees and their dependents. TRICARE rebate accruals are included in chargeback accruals and are based on estimated Department of Defense eligible sales multiplied by the TRICARE rebate formula.

Allowance for Doubtful Accounts: We estimate an allowance for doubtful accounts primarily based on the credit worthiness of our customers, historical payment patterns, aging of receivable balances and general economic conditions, including publicly available information on the credit worthiness of countries themselves and provinces or areas within such countries where they are the ultimate customers.

Income Taxes: We utilize the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement carrying amounts and tax bases of assets and liabilities using enacted tax rates in effect for years in which the temporary differences are expected to reverse. We provide a valuation allowance when it is more likely than not that deferred tax assets will not be realized.

We account for interest and penalties related to uncertain tax positions as part of our provision for income taxes. These unrecognized tax benefits relate primarily to issues common among multinational corporations in our industry. We apply a variety of methodologies in making these estimates which include studies performed by independent economists, advice from industry and subject experts, evaluation of public actions taken by the U.S. Internal Revenue Service and other taxing authorities, as well as our own industry experience. We provide estimates for unrecognized tax benefits. If our estimates are not representative of actual outcomes, our results of operations could be materially impacted.

We periodically evaluate the likelihood of the realization of deferred tax assets, and reduce the carrying amount of these deferred tax assets by a valuation allowance to the extent we believe a portion will not be realized. We consider many factors when assessing the likelihood of future realization of deferred tax assets, including our recent cumulative earnings experience by taxing jurisdiction, expectations of future taxable income, carryforward periods available to us for tax reporting purposes, various income tax strategies and other relevant factors. Significant judgment is required in making this assessment and, to the extent future expectations change, we would have to assess the recoverability of our deferred tax assets at that time. At December 31, 2015, it was more likely than not that we would realize our deferred tax assets, net of valuation allowances.

Share-Based Compensation: We utilize share based compensation in the form of stock options, restricted stock units, or RSUs, and performance-based restricted stock units, or PSUs. Compensation expense is recognized in the Consolidated Statements of Income based on the estimated fair value of the awards at grant date. Compensation expense recognized reflects an estimate of the number of awards expected to vest after taking into consideration an estimate of award forfeitures based on actual experience and is recognized on a straight-line basis over the requisite service period, which is generally the vesting period required to obtain full vesting. Management expectations related to the achievement of performance goals associated with PSU grants is assessed regularly and that assessment is used to determine whether PSU grants are expected to vest. If performance-based milestones related to PSU grants are not met or not expected to be met, any compensation expense recognized to date associated with grants that are not expected to vest will be reversed.

Other-Than-Temporary Impairments of Available-For-Sale Marketable Securities: A decline in the market value of any available-for-sale marketable security below its cost that is deemed to be other-than-temporary results in a reduction in carrying amount to fair value. The impairment is charged to operations and a new cost basis for the security established. The determination of whether an available-for-sale marketable security is other-than-temporarily impaired requires significant judgment and requires consideration of available quantitative and qualitative evidence in evaluating the potential impairment. Factors evaluated to determine whether the investment is other-than-temporarily impaired include: significant deterioration in the issuer's earnings performance, credit rating, asset quality, business prospects of the issuer, adverse changes in the general market conditions in which the issuer operates, length of time that the fair value has been below our cost, our expected future cash flows from the security, our intent not to sell, an evaluation as to whether it is more likely than not that we will not have to sell before recovery of our cost basis, and issues that raise concerns about the issuer's ability to continue as a going concern. Assumptions associated with these factors are subject to future market and economic conditions, which could differ from our assessment.

Derivatives and Hedging Activities: All derivative instruments are recognized on the balance sheet at their fair value. Changes in the fair value of derivative instruments are recorded each period in current earnings or other comprehensive income (loss), depending

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on whether a derivative instrument is designated as part of a hedging transaction and, if it is, the type of hedging transaction. For a derivative to qualify as a hedge at inception and throughout the hedged period, we formally document the nature and relationships between the hedging instruments and hedged item. We assess, both at inception and on an on-going basis, whether the derivative instruments that are used in cash flow hedging transactions are highly effective in offsetting the changes in cash flows of hedged items. We assess hedge effectiveness on a quarterly basis and record the gain or loss related to the ineffective portion of derivative instruments, if any, to current earnings. If we determine that a forecasted transaction is no longer probable of occurring, we discontinue hedge accounting and any related unrealized gain or loss on the derivative instrument is recognized in current earnings. We use derivative instruments, including those not designated as part of a hedging transaction, to manage our exposure to movements in foreign exchange, our stock price and interest rates. The use of these derivative instruments modifies the exposure of these risks with the intent to reduce our risk or cost.

Investments in Other Entities: We hold a portfolio of investments in equity securities and certain investment funds that are accounted for under either the equity method or cost method. Investments in companies or certain investment funds over which we have significant influence but not a controlling interest are accounted for using the equity method, with our share of earnings or losses reported in other income (expense), net. Investments in equity securities of companies that become publicly traded are accounted for as available-for-sale marketable securities prospectively from the date of such companies' initial public offering.

Our cost method and equity method investments are included in other assets on the Consolidated Balance Sheets.

All investments are reviewed on a regular basis for possible impairment. If an investment's fair value is determined to be less than its net carrying value and the decline is determined to be other-than-temporary, the investment is written down to its fair value. Such an evaluation is judgmental and dependent on specific facts and circumstances. Factors considered in determining whether an other-than-temporary decline in value has occurred include: market value or exit price of the investment based on either market-quoted prices or future rounds of financing by the investee; length of time that the market value was below its cost basis; financial condition and business prospects of the investee; our intent and ability to retain the investment for a sufficient period of time to allow for recovery in market value of the investment; issues that raise concerns about the investee's ability to continue as a going concern; any other information that we may be aware of related to the investment.

Accounting for Long-Term Incentive Plans: We have established a Long-Term Incentive Plan, or LTIP, designed to provide key officers and executives with performance-based incentive opportunities contingent upon achievement of pre-established corporate performance objectives covering a three-year period. We currently have three separate three-year performance cycles running concurrently ending December 31, 2016, 2017 and 2018. Performance measures for each of the performance cycles are based on the following components: 37.5% on non-GAAP earnings per share, as defined; 37.5% on total non-GAAP revenue, as defined; and 25% on relative total shareholder return, which is a measurement of our stock price performance during the applicable three-year period, compared with a group of other companies in the biopharmaceutical industry.

Threshold, target and maximum cash payout levels under the three current LTIP performance cycles are calculated as a percentage between 0% and 200% of each participant’s base salary at the time the LTIP was approved by the Compensation Committee. Such awards are payable in cash or common stock or a mixture of cash and common stock, which will be determined by the Compensation Committee at the time of award delivery. Share-based payout levels are calculated using the cash-based threshold, target and maximum levels, divided by the average closing price of Celgene stock for the 30 trading days prior to the commencement of each performance cycle. Therefore, final share-based award values are reflective of the stock price at the end of the measurement period. The Compensation Committee may determine that payments made in common stock are restricted from trading for a period of time. We accrue the long-term incentive liability over each three-year cycle. Prior to the end of a three-year cycle, the accrual is based on an estimate of our level of achievement during the cycle. Upon a change in control, participants will be entitled to an immediate payment equal to their target award or, if higher, an award based on actual performance through the date of the change in control.

Accruals recorded for the LTIP entail making certain assumptions concerning future non-GAAP earnings per share, non-GAAP revenues and relative total shareholder return, as defined; the actual results of which could be materially different than the assumptions used. Accruals for the LTIP are reviewed on a regular basis and revised accordingly so that the liability recorded reflects updated estimates of future payouts. In estimating the accruals, management considers actual results to date for the performance period, expected results for the remainder of the performance period, operating trends, product development, pricing and competition.

Valuation of Goodwill, Acquired Intangible Assets, Other Assets and IPR&D: We have recorded goodwill, acquired intangible assets and IPR&D through acquisitions accounted for as business combinations. When identifiable intangible assets, including in-process research and development and technology platforms are acquired, we determine the fair values of these assets as of the

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acquisition date. Discounted cash flow models are typically used in these valuations if quoted market prices are not available, and the models require the use of significant estimates and assumptions including but not limited to:

• projecting regulatory approvals;

• estimating future cash flows from product sales resulting from completed products and in-process projects or estimating future cash flows expected to be collected; and

• developing appropriate discount rates and probability rates.

Goodwill represents the excess of purchase price over fair value of net assets acquired in a business combination accounted for by the acquisition method of accounting and is not amortized, but is subject to impairment testing. We test our goodwill for impairment at least annually or when a triggering event occurs that could indicate a potential impairment by assessing qualitative factors or performing a quantitative analysis in determining whether it is more likely than not that the fair value of net assets are below their carrying amounts.

Intangible assets with definite useful lives are amortized to their estimated residual values over their estimated useful lives and reviewed for impairment if certain events occur. Intangible assets related to IPR&D product rights are treated as indefinite-lived intangible assets and not amortized until the product is approved for sale by regulatory authorities in specified markets. At that time, we will determine the useful life of the asset, reclassify the asset out of IPR&D and begin amortization. Impairment testing is also performed at least annually or when a triggering event occurs that could indicate a potential impairment. Such test entails completing an updated discounted cash flow model to estimate the fair value of the IPR&D asset. If required, the impairment test for intangible assets with definite useful lives is completed by comparing an updated non-discounted cash flow model to the book value of the intangible asset.

Valuation of Contingent Consideration Resulting from a Business Combination: We record contingent consideration resulting from a business combination at its fair value on the acquisition date, and for each subsequent reporting period revalue these obligations and record increases or decreases in their fair value as an adjustment to operating earnings in the consolidated statements of income. Changes to contingent consideration obligations can result from movements in publicly traded share prices of CVRs, adjustments to discount rates and periods, updates in the assumed achievement or timing of any development milestones or changes in the probability of certain clinical events and changes in the assumed probability associated with regulatory approval. The assumptions related to determining the value of a contingent consideration include a significant amount of judgment and any changes in the assumptions could have a material impact on the amount of contingent consideration expense recorded in any given period. Our contingent consideration liabilities were recorded in the acquisitions of Gloucester, Abraxis, Avila, Nogra, and Quanticel. The fair values of the Gloucester, Avila, Nogra, and Quanticel contingent consideration liabilities are based on the discount rate, probability and estimated timing of cash milestone payments to the former shareholders of each business. The fair value of the Abraxis contingent consideration liability is based on the quoted market price of the publicly traded CVRs.

ITEM 7A.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The following discussion provides forward-looking quantitative and qualitative information about our potential exposure to market risk. Market risk represents the potential loss arising from adverse changes in the value of financial instruments. The risk of loss is assessed based on the likelihood of adverse changes in fair values, cash flows or future earnings.

We have established guidelines relative to the diversification and maturities of investments to maintain safety and liquidity. These guidelines are reviewed periodically and may be modified depending on market conditions. Although investments may be subject to credit risk, our investment policy specifies credit quality standards for our investments and limits the amount of credit exposure from any single issue, issuer or type of investment. At December 31, 2015, our market risk sensitive instruments consisted of marketable securities available-for-sale, our long-term debt and certain derivative contracts.

Marketable Securities Available-for-Sale:  At December 31, 2015, our marketable securities available for sale consisted of U.S. Treasury securities, U.S. government-sponsored agency mortgage-backed (MBS) securities, global corporate debt securities, asset backed securities and marketable equity securities. U.S. government-sponsored agency MBS include mortgage backed securities issued by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation and the Government National Mortgage Association. Corporate debt – global includes obligations issued by investment-grade corporations including some issues that have been guaranteed by governments and government agencies. Asset backed securities consist of triple-A rated securities with cash flows collateralized by credit card receivables and auto loans.

Our marketable securities available for sale are primarily equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements. In addition, we invest in debt securities that are carried at fair value, held for an unspecified period of time and are intended for use in meeting our ongoing

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liquidity needs. Unrealized gains and losses on available-for-sale securities, which are deemed to be temporary, are reported as a separate component of stockholders' equity, net of tax. The cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. The amortization, along with realized gains and losses and other than temporary impairment charges, is included in interest and investment income, net.

As of December 31, 2015, the principal amounts, fair values and related weighted-average interest rates of our investments in debt securities classified as marketable securities available-for-sale were as follows (dollar amounts in millions):

	Duration
	Less than 1 Year			1 to 3 Years			3 to 5 Years			Total
Principal amount	$	58.2		$	361.6		$	15.6		$	435.4
Fair value	$	58.3		$	361.8		$	15.6		$	435.7
Weighted average interest rate	1.2		%	1.6		%	2.9		%	1.6		%

Debt Obligations:

Short-Term Borrowings and Current Portion of Long-Term Debt: The carrying value of short-term borrowings and current portion of long-term debt outstanding at December 31, 2015 and December 31, 2014 includes (in millions):

	2015		2014
Commercial paper	$	—	$	99.6
2.450% senior notes due 2015	—		506.3
Total	$	—	$	605.9

Long-Term Debt:   We have issued an aggregate $14.250 billion principal amount of senior notes at varying maturity dates and interest rates. The principal amounts and carrying values of the long-term portion of these senior notes as of the end of December 31, 2015 are summarized below (in millions):

	Principal Amount		Carrying Value
1.900% senior notes due 2017	$	500.0	$	501.2
2.125% senior notes due 2018	1,000.0		999.9
2.300% senior notes due 2018	400.0		401.7
2.250% senior notes due 2019	500.0		505.1
2.875% senior notes due 2020	1,500.0		1,497.5
3.950% senior notes due 2020	500.0		507.1
3.250% senior notes due 2022	1,000.0		1,016.1
3.550% senior notes due 2022	1,000.0		997.4
4.000% senior notes due 2023	700.0		710.3
3.625% senior notes due 2024	1,000.0		1,001.7
3.875% senior notes due 2025	2,500.0		2,475.6
5.700% senior notes due 2040	250.0		249.6
5.250% senior notes due 2043	400.0		396.7
4.625% senior notes due 2044	1,000.0		996.6
5.000% senior notes due 2045	2,000.0		1,993.9
Total long-term debt	$	14,250.0	$	14,250.4

At December 31, 2015, the fair value of our senior notes outstanding was $14.299 billion.

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MARKET RISK MANAGEMENT

Our revenue and earnings, cash flows and fair values of assets and liabilities can be impacted by fluctuations in foreign exchange rates and interest rates. We actively manage the impact of foreign exchange rate and interest rate movements through operational means and through the use of various financial instruments, including derivative instruments such as foreign currency option contracts, foreign currency forward contracts, treasury rate lock agreements and interest rate swap contracts. In instances where these financial instruments are accounted for as cash flow hedges or fair value hedges, we may from time to time terminate the hedging relationship. If a hedging relationship is terminated we generally either settle the instrument or enter into an offsetting instrument.

Foreign Currency Risk Management

We maintain a foreign exchange exposure management program to mitigate the impact of volatility in foreign exchange rates on future foreign currency cash flows, translation of foreign earnings and changes in the fair value of assets and liabilities denominated in foreign currencies.

Through our revenue hedging program, we endeavor to reduce the impact of possible unfavorable changes in foreign exchange rates on our future U.S. dollar cash flows that are derived from foreign currency denominated sales. To achieve this objective, we hedge a portion of our forecasted foreign currency denominated sales that are expected to occur in the foreseeable future, typically within the next three years. We manage our anticipated transaction exposure principally with foreign currency forward contracts and occasionally foreign currency put and call options.

Foreign Currency Forward Contracts: We use foreign currency forward contracts to hedge specific forecasted transactions denominated in foreign currencies, manage exchange rate volatility in the translation of foreign earnings and reduce exposures to foreign currency fluctuations of certain assets and liabilities denominated in foreign currencies.

We manage a portfolio of foreign currency forward contracts to protect against changes in anticipated foreign currency cash flows resulting from changes in foreign currency exchange rates, primarily associated with non-functional currency denominated revenues and expenses of foreign subsidiaries. The foreign currency forward hedging contracts outstanding at December 31, 2015 and December 31, 2014 had settlement dates within 36 months. The spot rate components of these foreign currency forward contracts are designated as cash flow hedges and, to the extent effective, any unrealized gains or losses are reported in other comprehensive income (OCI) and reclassified to operations in the same periods during which the underlying hedged transactions affect earnings. If a hedging relationship is terminated with respect to a foreign currency forward contract, accumulated gains or losses associated with the contract remain in OCI until the hedged forecasted transaction occurs and are reclassified to operations in the same periods during which the underlying hedged transaction affects earnings. Any ineffectiveness on these foreign currency forward contracts is reported on the Consolidated Statements of Income in other income (expense), net. The forward point components of these foreign currency forward contracts are not designated as cash flow hedges and all fair value adjustments of forward point amounts are recorded to other income (expense), net. Foreign currency forward contracts entered into to hedge forecasted revenue and expenses were as follows at December 31, 2015 and December 31, 2014 (in millions):

	Notional Amount
Foreign Currency:	2015		2014
Australian Dollar	$	45.1	$	18.8
British Pound	289.3		304.8
Canadian Dollar	135.9		43.7
Euro	2,934.3		3,375.7
Japanese Yen	510.4		541.1
Total	$	3,915.0	$	4,284.1

We consider the impact of our own and the counterparties’ credit risk on the fair value of the contracts as well as the ability of each party to execute its obligations under the contract on an ongoing basis. As of December 31, 2015, credit risk did not materially change the fair value of our foreign currency forward contracts.

We also manage a portfolio of foreign currency contracts to reduce exposures to foreign currency fluctuations of certain recognized assets and liabilities denominated in foreign currencies and, from time to time, we enter into foreign currency contracts to manage exposure related to translation of foreign earnings. These foreign currency forward contracts have not been designated as hedges

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and, accordingly, any changes in their fair value are recognized on the Consolidated Statements of Income in other income (expense), net in the current period. The aggregate notional amount of the foreign currency forward non-designated hedging contracts outstanding at December 31, 2015 and December 31, 2014 were $920.0 million and $835.5 million, respectively.

Although not predictive in nature, we believe a hypothetical 10% threshold reflects a reasonably possible near-term change in foreign currency rates. Assuming that the December 31, 2015 exchange rates were to change by a hypothetical 10%, the fair value of the foreign currency forward contracts would change by approximately $477.4 million. However, since the contracts either hedge specific forecasted intercompany transactions denominated in foreign currencies or relate to assets and liabilities denominated in currencies other than the entities' functional currencies, any change in the fair value of the contract would be either reported in other comprehensive income and reclassified to earnings in the same periods during which the underlying hedged transactions affect earnings or re-measured through earnings each period along with the underlying asset or liability.

Foreign Currency Option Contracts: From time to time, we may hedge a portion of our future foreign currency exposure by utilizing a strategy that involves both a purchased local currency put option and a written local currency call option that are accounted for as hedges of future sales denominated in that local currency. Specifically, we sell (or write) a local currency call option and purchase a local currency put option with the same expiration dates and local currency notional amounts but with different strike prices. This combination of transactions is generally referred to as a “collar.” The expiration dates and notional amounts correspond to the amount and timing of forecasted foreign currency sales. If the U.S. dollar weakens relative to the currency of the hedged anticipated sales, the purchased put option value reduces to zero and we benefit from the increase in the U.S. dollar equivalent value of our anticipated foreign currency cash flows; however, this benefit would be capped at the strike level of the written call, which forms the upper end of the collar. The premium collected from the sale of the call option is equal to the premium paid for the purchased put option, resulting in a net zero cost for each collar. Outstanding foreign currency option contracts entered into to hedge forecasted revenue were as follows at December 31, 2015 and 2014 (in millions):

	Notional Amount1
	2015		2014
Foreign currency option contracts designated as hedging activity:
Purchased Put	$	641.5	$	152.6
Written Call	$	690.0	$	160.9

¹ U.S. dollar notional amounts are calculated as the hedged local currency amount multiplied by the strike value of the foreign currency option. The local currency notional amounts of our purchased put and written call that are designated as hedging activities are equal to each other.

Assuming that the December 31, 2015 exchange rates were to change by a hypothetical 10%, the fair value of the foreign currency option contracts would increase by approximately $50.1 million if the US Dollar were to strengthen and decrease by approximately $49.1 million if the US Dollar were to weaken. However, since the contracts hedge specific forecasted intercompany transactions denominated in foreign currencies, any change in the fair value of the contract would be reported in other comprehensive income and reclassified to earnings in the same periods during which the underlying hedged transactions affect earnings.

Interest Rate Risk Management

In anticipation of issuing fixed-rate debt, we may use forward starting interest rate swaps (forward starting swaps) or treasury rate lock agreements (treasury rate locks) that are designated as cash flow hedges to hedge against changes in interest rates that could impact expected future issuances of debt. To the extent these hedges of cash flows related to anticipated debt are effective, any realized or unrealized gains or losses on the treasury rate locks or forward starting swaps are reported in OCI and are recognized in income over the life of the anticipated fixed-rate notes.

Forward Starting Interest Rate Swaps and Treasury Rate Locks: During 2014, we entered into forward starting swaps that were designated as cash flow hedges to hedge against changes in interest rates that could impact an anticipated issuance of debt in 2015. During 2015, we entered into additional forward starting swaps and treasury rate locks. Forward starting swaps and treasury rate locks with a combined aggregate notional value of $2.900 billion were settled upon the issuance of debt in August 2015, when the net fair value of the forward starting swaps and treasury rate locks in accumulated other comprehensive income was in a loss position of $21.6 million. The net loss will be recognized as interest expense over the life of the associated senior notes. During 2015 and in January 2016, we entered into forward starting swaps with effective dates in September 2017 and maturing in ten years.

A sensitivity analysis to measure potential changes in the market value of our forward starting interest rate swap contracts from a change in interest rates indicated that a one percentage point increase in interest rates at December 31, 2015 would have increased

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the fair value of our contracts by $16.1 million. A one percentage point decrease at December 31, 2015 would have decreased the aggregate fair value of our contracts by $18.4 million.

Interest Rate Swap Contracts: From time to time we hedge the fair value of certain debt obligations through the use of interest rate swap contracts. The interest rate swap contracts are designated hedges of the fair value changes in the notes attributable to changes in interest rates. Since the specific terms and notional amount of the swap are intended to match those of the debt being hedged, it is assumed to be a highly effective hedge and all changes in fair value of the swap are recorded on the Consolidated Balance Sheets with no net impact recorded in income. Any net interest payments made or received on interest rate swap contracts are recognized as interest expense. If a hedging relationship is terminated for an interest rate swap contract, accumulated gains or losses associated with the contract are measured and recorded as a reduction or increase of current and future interest expense associated with the previously hedged debt obligations.

We have entered into swap contracts that were designated as hedges of certain of our fixed rate notes and also terminated the hedging relationship by settling certain of those swap contracts during 2013, 2014 and 2015. The settlement of swap contracts due to terminations and maturities resulted in the receipt of net proceeds of $10.8 million and $25.5 million in 2015 and 2014, respectively, which are accounted for as a reduction of current and future interest expense associated with these notes. See Note 11 for additional details related to reductions of current and future interest expense.

The following table summarizes the notional amounts of our outstanding interest rate swap contracts at December 31, 2015 and December 31, 2014 (in millions): 

	Notional Amount
	2015		2014
Interest rate swap contracts entered into as fair value hedges of the following fixed-rate senior notes:
2.450% senior notes due 2015	$	—	$	300.0
1.900% senior notes due 2017	300.0		300.0
2.300% senior notes due 2018	200.0		200.0
2.250% senior notes due 2019	500.0		500.0
3.950% senior notes due 2020	500.0		500.0
3.250% senior notes due 2022	1,000.0		750.0
4.000% senior notes due 2023	700.0		150.0
3.625% senior notes due 2024	100.0		—
3.875% senior notes due 2025	250.0		—
Total	$	3,550.0	$	2,700.0

A sensitivity analysis to measure potential changes in the market value of our debt and interest rate swap contracts from a change in interest rates indicated that a one percentage point increase in interest rates at December 31, 2015 would have reduced the aggregate fair value of our net payable by $877.4 million. A one percentage point decrease at December 31, 2015 would have increased the aggregate fair value of our net payable by $1.032 billion.

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ITEM 8.    FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

CELGENE CORPORATION AND SUBSIDIARIES

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

	Page
Consolidated Financial Statements
Report of Independent Registered Public Accounting Firm	60
Consolidated Balance Sheets as of December 31, 2015 and 2014	61
Consolidated Statements of Income – Years Ended December 31, 2015, 2014 and 2013	62
Consolidated Statements of Comprehensive Income – Years Ended December 31, 2015, 2014 and 2013	63
Consolidated Statements of Cash Flows – Years Ended December 31, 2015, 2014 and 2013	64
Consolidated Statements of Stockholders' Equity – Years Ended December 31, 2015, 2014 and 2013	66
Notes to Consolidated Financial Statements	67
Financial Statement Schedule
Schedule II – Valuation and Qualifying Accounts	127

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders

Celgene Corporation:

We have audited the accompanying consolidated balance sheets of Celgene Corporation and subsidiaries (the Company) as of December 31, 2015 and 2014, and the related consolidated statements of income, comprehensive income, cash flows, and stockholders' equity for each of the years in the three-year period ended December 31, 2015. In connection with our audits of the consolidated financial statements, we also have audited the consolidated financial statement schedule, "Schedule II – Valuation and Qualifying Accounts." These consolidated financial statements and consolidated financial statement schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these consolidated financial statements and consolidated financial statement schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). 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 financial position of Celgene Corporation and subsidiaries as of December 31, 2015 and 2014, and the results of their operations and their cash flows for each of the years in the three-year period ended December 31, 2015, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related consolidated financial statement schedule, when considered in relation to the basic consolidated 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), the effectiveness of the Company's internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013 and our report dated February 11, 2016 expressed an unqualified opinion on the effectiveness of the Company's internal control over financial reporting.

As discussed in Note 1 to the consolidated financial statements, the Company has adopted on a prospective basis FASB Accounting Standards Update No. 2015-17, Balance Sheet Classification of Deferred Taxes classifying all deferred tax assets, liabilities and associated valuation allowances as non-current.

/s/ KPMG LLP

Short Hills, New Jersey

February 11, 2016

60

CELGENE CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Dollars in millions, except per share amounts)

	December 31,
	2015			2014
Assets
Current assets:
Cash and cash equivalents	$	4,880.3		$	4,121.6
Marketable securities available-for-sale	1,671.6			3,425.1
Accounts receivable, net of allowances of $30.3 and $32.1 at December 31, 2015 and 2014, respectively	1,420.9			1,166.7
Inventory	443.4			393.1
Other current assets	984.7			606.1
Total current assets	9,400.9			9,712.6
Property, plant and equipment, net	814.1			642.6
Intangible assets, net	10,858.1			4,067.6
Goodwill	4,879.0			2,191.2
Other assets	1,101.3			726.1
Total assets	$	27,053.4		$	17,340.1
Liabilities and Stockholders' Equity
Current liabilities:
Short-term borrowings and current portion of long-term debt	$	—		$	605.9
Accounts payable	240.8			198.2
Accrued expenses	1,376.7			991.1
Income taxes payable	19.8			12.7
Current portion of deferred revenue	60.6			28.5
Other current liabilities	271.0			275.8
Total current liabilities	1,968.9			2,112.2
Deferred revenue, net of current portion	30.0			27.8
Income taxes payable	324.2			272.9
Other non-current tax liabilities	2,519.2			—
Other non-current liabilities	2,041.7			2,136.7
Long-term debt, net of discount	14,250.4			6,265.7
Total liabilities	21,134.4			10,815.3
Commitments and Contingencies (Note 18)
Stockholders' Equity:
Preferred stock, $.01 par value per share, 5.0 million shares authorized; none outstanding at December 31, 2015 and 2014, respectively	—			—
Common stock, $.01 par value per share, 1,150.0 million shares authorized; issued 940.1 million and 924.8 million shares at December 31, 2015 and 2014, respectively	9.4			9.2
Common stock in treasury, at cost; 153.5 million and 124.6 million shares at December 31, 2015 and 2014, respectively	(14,051.8		)	(10,698.8		)
Additional paid-in capital	11,119.3			9,827.2
Retained earnings	8,074.4			6,472.4
Accumulated other comprehensive income	767.7			914.8
Total stockholders' equity	5,919.0			6,524.8
Total liabilities and stockholders' equity	$	27,053.4		$	17,340.1

See accompanying Notes to Consolidated Financial Statements

61

CELGENE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(In millions, except per share amounts)

	Years Ended December 31,
	2015			2014			2013
Revenue:
Net product sales	$	9,161.1		$	7,563.8		$	6,362.3
Other revenue	94.9			106.6			131.6
Total revenue	9,256.0			7,670.4			6,493.9
Expenses:
Cost of goods sold (excluding amortization of acquired intangible assets)	420.1			385.9			340.4
Research and development	3,697.3			2,430.6			2,226.2
Selling, general and administrative	2,305.4			2,027.9			1,684.5
Amortization of acquired intangible assets	279.0			258.3			262.8
Acquisition related charges and restructuring, net	299.6			48.7			171.1
Total costs and expenses	7,001.4			5,151.4			4,685.0
Operating income	2,254.6			2,519.0			1,808.9
Other income and (expense):
Interest and investment income, net	31.1			28.2			22.0
Interest (expense)	(310.6		)	(176.1		)	(91.6		)
Other income (expense), net	48.4			(43.7		)	(73.9		)
Income before income taxes	2,023.5			2,327.4			1,665.4
Income tax provision	421.5			327.5			215.5
Net income	$	1,602.0		$	1,999.9		$	1,449.9
Net income per share (Note 1):
Basic	$	2.02		$	2.49		$	1.75
Diluted	$	1.94		$	2.39		$	1.68
Weighted average shares (Note 1):
Basic	792.2			802.7			827.7
Diluted	824.9			836.0			860.6

See accompanying Notes to Consolidated Financial Statements

62

CELGENE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Dollars in millions)

	Years Ended December 31,
	2015			2014			2013
Net income	$	1,602.0		$	1,999.9		$	1,449.9
Other comprehensive income (loss):
Foreign currency translation adjustments	(26.1		)	(49.8		)	27.4
Pension liability adjustment	1.6			(8.6		)	3.2
Net unrealized gains (losses) related to cash flow hedges:
Unrealized holding gains (losses)	410.5			568.1			(3.2		)
Tax (expense) benefit	7.2			12.3			(2.6		)
Unrealized holding gains (losses), net of tax	417.7			580.4			(5.8		)
Reclassification adjustment for (gains) included in net income	(348.7		)	(23.1		)	(7.3		)
Tax (benefit)	(2.2		)	(1.7		)	(6.9		)
Reclassification adjustment for (gains) included in net income, net of tax	(350.9		)	(24.8		)	(14.2		)
Net unrealized gains (losses) on marketable securities available for sale:
Unrealized holding gains (losses)	(314.4		)	494.0			205.1
Tax (expense) benefit	109.8			(173.9		)	(77.1		)
Unrealized holding gains (losses), net of tax	(204.6		)	320.1			128.0
Reclassification adjustment for losses included in net income	23.4			5.4			7.3
Tax (benefit)	(8.2		)	(1.9		)	(2.2		)
Reclassification adjustment for losses included in net income, net of tax	15.2			3.5			5.1
Total other comprehensive income (loss)	(147.1		)	820.8			143.7
Comprehensive income	$	1,454.9		$	2,820.7		$	1,593.6

See accompanying Notes to Consolidated Financial Statements

63

CELGENE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Dollars in millions)

	Years Ended December 31,
	2015			2014			2013
Cash flows from operating activities:
Net income	$	1,602.0		$	1,999.9		$	1,449.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	114.9			104.3			96.9
Amortization	294.0			269.3			277.2
Deferred income taxes	(33.4		)	(272.3		)	(246.6		)
Impairment charges	48.9			133.2			105.4
Change in value of contingent consideration	(7.9		)	48.7			171.1
Net (gain) loss on sale of investments	(83.5		)	5.4			7.0
Share-based compensation expense	576.6			447.6			325.8
Share-based employee benefit plan expense	35.1			40.7			32.6
Derivative instruments	(31.4		)	(71.9		)	(8.7		)
Other, net	18.8			(13.5		)	11.0
Change in current assets and liabilities, excluding the effect of acquisitions:
Accounts receivable	(304.7		)	(166.3		)	(101.4		)
Inventory	(50.6		)	(56.5		)	(89.7		)
Other operating assets	(326.2		)	52.6			(90.9		)
Accounts payable and other operating liabilities	533.0			252.3			287.2
Payment of contingent consideration	—			(14.3		)	(75.0		)
Income tax payable	61.2			39.1			57.4
Deferred revenue	37.1			8.0			16.7
Net cash provided by operating activities	2,483.9			2,806.3			2,225.9
Cash flows from investing activities:
Proceeds from sales of marketable securities available for sale	3,799.6			2,175.9			3,642.3
Purchases of marketable securities available for sale	(1,889.3		)	(2,661.4		)	(3,983.6		)
Payments for acquisition of businesses, net of cash acquired	(7,695.1		)	(710.0		)	—
Capital expenditures	(286.3		)	(150.3		)	(119.7		)
Proceeds from sales of investment securities	92.0			—			—
Purchases of investment securities	(272.5		)	(67.4		)	(47.1		)
Other investing activities	(7.4		)	(24.8		)	(20.5		)
Net cash used in investing activities	(6,259.0		)	(1,438.0		)	(528.6		)
Cash flows from financing activities:
Payment for treasury shares	(3,256.8		)	(2,975.1		)	(2,764.6		)
Proceeds from short-term borrowing	6,111.5			2,566.9			4,462.0
Principal repayments on short-term borrowing	(6,213.2		)	(3,012.2		)	(4,227.9		)
Proceeds from the issuance of long-term debt, net of issuance costs	7,913.3			2,470.6			1,479.6
Repayments of long-term debt	(513.9		)	—			—
Net (payments) proceeds from common equity put options	(8.6		)	10.3			1.2
Payment of contingent consideration	—			(25.7		)	(225.0		)
Net proceeds from share-based compensation arrangements	251.7			297.2			551.6
Excess tax benefit from share-based compensation arrangements	300.5			250.6			169.4
Net cash provided by (used in) financing activities	4,584.5			(417.4		)	(553.7		)
Effect of currency rate changes on cash and cash equivalents	(50.7		)	(63.7		)	0.4
Net increase in cash and cash equivalents	758.7			887.2			1,144.0
Cash and cash equivalents at beginning of period	4,121.6			3,234.4			2,090.4
Cash and cash equivalents at end of period	$	4,880.3		$	4,121.6		$	3,234.4

See accompanying Notes to Consolidated Financial Statements

64

CELGENE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS – (Continued)

(Dollars in millions)

	Years Ended December 31,
	2015		2014			2013
Supplemental schedule of non-cash investing and financing activity:
Fair value of contingent consideration issued in business combinations	$	166.0	$	1,060.0		$	—
Change in net unrealized (gain) loss on marketable securities available for sale	$	314.4	$	(494.0	)	$	(205.1	)
Investment in NantBioScience, Inc. preferred equity	$	—	$	90.0		$	—
Supplemental disclosure of cash flow information:
Interest paid	$	243.3	$	196.2		$	90.8
Income taxes paid	$	361.1	$	294.6		$	291.9

See accompanying Notes to Consolidated Financial Statements

65

CELGENE CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(Dollars in millions)

Years Ended December 31, 2015, 2014 and 2013	Common Stock		Treasury Stock			Additional Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)			Stockholders' Equity
Balances at December 31, 2012 (Note 1)	$	8.8	$	(4,823.2	)	$	7,536.0	$	3,022.6	$	(49.7	)	$	5,694.5
Net income								1,449.9					1,449.9
Other comprehensive income										143.7			143.7
Exercise of stock options and conversion of restricted stock units	0.2		(69.7		)	623.5							554.0
Shares purchased under share repurchase program			(2,769.2		)								(2,769.2		)
Issuance of common stock for employee benefit plans	0.1					21.9							22.0
Expense related to share-based compensation						325.0							325.0
Income tax benefit upon exercise of stock options						170.0							170.0
Balances at December 31, 2013	$	9.1	$	(7,662.1	)	$	8,676.4	$	4,472.5	$	94.0		$	5,589.9
Net income								1,999.9					1,999.9
Other comprehensive income										820.8			820.8
Exercise of stock options and conversion of restricted stock units	0.1		(126.1		)	424.2							298.2
Shares purchased under share repurchase program			(2,929.5		)								(2,929.5		)
Issuance of common stock for employee benefit plans			18.9			26.5							45.4
Expense related to share-based compensation						447.5							447.5
Income tax benefit upon exercise of stock options						252.6							252.6
Balances at December 31, 2014	$	9.2	$	(10,698.8	)	$	9,827.2	$	6,472.4	$	914.8		$	6,524.8
Net income								1,602.0					1,602.0
Other comprehensive loss										(147.1		)	(147.1		)
Exercise of stock options and conversion of restricted stock units	0.2		(135.4		)	394.9							259.7
Shares purchased under share repurchase program			(3,256.8		)								(3,256.8		)
Issuance of common stock for employee benefit plans			39.2			18.5							57.7
Expense related to share-based compensation						576.6							576.6
Income tax benefit upon exercise of stock options						302.1							302.1
Balances at December 31, 2015	$	9.4	$	(14,051.8	)	$	11,119.3	$	8,074.4	$	767.7		$	5,919.0

See accompanying Notes to Consolidated Financial Statements

66

CELGENE CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Amounts in millions, except per share amounts, unless otherwise indicated)

1.     Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies

Celgene Corporation, together with its subsidiaries (collectively “we,” “our,”  “us,” “Celgene” or the “Company”), is an integrated global biopharmaceutical company engaged primarily in the discovery, development and commercialization of innovative therapies for the treatment of cancer and inflammatory diseases through next-generation solutions in protein homeostasis, immuno-oncology, epigenetics, immunology and neuro-inflammation. Celgene Corporation was incorporated in the State of Delaware in 1986.

Our primary commercial stage products include REVLIMID^®, POMALYST^®/IMNOVID^®, ABRAXANE^®,OTEZLA^®, VIDAZA^®, azacitidine for injection (generic version of VIDAZA^®),THALOMID^® (sold as THALOMID^® or Thalidomide Celgene^TM outside of the U.S.), and ISTODAX^®.In addition we earn revenue through licensing arrangements.

The consolidated financial statements include the accounts of Celgene Corporation and its subsidiaries. Investments in limited partnerships and interests where we have an equity interest of 50% or less and do not otherwise have a controlling financial interest are accounted for by either the equity or cost method.

In June 2014, our stockholders voted to approve an amendment to our Certificate of Incorporation that increased the number of shares of common stock that we are authorized to issue and effected a two-for-one stock split of outstanding shares (Stock Split). As a result, our total number of authorized shares of common stock increased from 575.0 million to 1.150 billion on June 18, 2014. Stockholders of record received one additional share of common stock for each share of common stock owned. All impacted share numbers and per share amounts presented in the consolidated financial statements and the accompanying notes to the financial statements have been restated to reflect the impact of the Stock Split. Common stock held in treasury was not adjusted for the Stock Split.

The preparation of the consolidated financial statements requires management to make estimates and assumptions that affect reported amounts and disclosures. Actual results could differ from those estimates. We are subject to certain risks and uncertainties related to, among other things, product development, regulatory approval, market acceptance, scope of patent and proprietary rights, competition, outcome of legal and governmental proceedings, European credit risk, technological change and product liability.

Certain prior year amounts have been reclassified to conform to the current year's presentation.

Financial Instruments: Certain financial instruments reflected in the Consolidated Balance Sheets, (e.g., cash, cash equivalents, accounts receivable, certain other assets, accounts payable, short-term borrowings and certain other liabilities) are recorded at cost, which approximates fair value due to their short-term nature. The fair values of financial instruments other than marketable securities are determined through a combination of management estimates and information obtained from third parties using the latest market data. The fair value of available-for-sale marketable securities is determined utilizing the valuation techniques appropriate to the type of security (See Note 4).

Derivative Instruments and Hedges: All derivative instruments are recognized on the balance sheet at their fair value. Changes in the fair value of derivative instruments are recorded each period in current earnings or other comprehensive income (loss), depending on whether a derivative instrument is designated as part of a hedging transaction and, if it is, the type of hedging transaction. For a derivative to qualify as a hedge at inception and throughout the hedged period, we formally document the nature and relationships between the hedging instruments and hedged item. We assess, both at inception and on an on-going basis, whether the derivative instruments that are used in cash flow hedging transactions are highly effective in offsetting the changes in cash flows of hedged items. We assess hedge ineffectiveness on a quarterly basis and record the gain or loss related to the ineffective portion of derivative instruments, if any, to current earnings. If we determine that a forecasted transaction is no longer probable of occurring, we discontinue hedge accounting and any related unrealized gain or loss on the derivative instrument is recognized in current earnings. We use derivative instruments, including those not designated as part of a hedging transaction, to manage our exposure to movements in foreign exchange, our stock price and interest rates. The use of these derivative instruments modifies the exposure of these risks with the intent to reduce our risk or cost.

Cash, Cash Equivalents and Marketable Securities Available for Sale: We invest our excess cash primarily in money market funds, U.S. Treasury securities, U.S. government-sponsored agency securities, U.S. government-sponsored agency mortgage-backed

67

CELGENE CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

securities (MBS), non-U.S. government, agency and supranational securities, global corporate debt securities and asset backed securities. All liquid investments with maturities of three months or less from the date of purchase are classified as cash equivalents and all investments with maturities of greater than three months from date of purchase are classified as marketable securities available for sale. We determine the appropriate classification of our investments in marketable debt and equity securities at the time of purchase. In addition, our equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements, are designated as marketable securities available for sale.

Our marketable securities available for sale are primarily equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements. In addition, we invest in debt securities that are carried at fair value, held for an unspecified period of time and are intended for use in meeting our ongoing liquidity needs. Unrealized gains and losses on available-for-sale securities, which are deemed to be temporary, are reported as a separate component of stockholders' equity, net of tax. The cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. The amortization, along with realized gains and losses and other-than-temporary impairment charges, is included in interest and investment income, net.

A decline in the market value of any available-for-sale security below its carrying value that is determined to be other-than-temporary would result in a charge to earnings and decrease in the security's carrying value down to its newly established fair value. Factors evaluated to determine if an investment is other-than-temporarily impaired include significant deterioration in earnings performance, credit rating, asset quality or business prospects of the issuer; adverse changes in the general market condition in which the issuer operates; our intent to hold to maturity and an evaluation as to whether it is more likely than not that we will not have to sell before recovery of its cost basis; our expected future cash flows from the security; and issues that raise concerns about the issuer's ability to continue as a going concern.

Concentration of Credit Risk: Cash, cash equivalents and marketable securities are financial instruments that potentially subject the Company to concentration of credit risk. We invest our excess cash primarily in money market funds, U.S. Treasury securities, U.S. government-sponsored agency securities, MBS, non-U.S. government, agency and supranational securities, global corporate debt securities and asset backed securities (See Note 6). We have established guidelines relative to diversification and maturities to maintain safety and liquidity. These guidelines are reviewed periodically and may be modified to take advantage of trends in yields and interest rates.

We sell our products in the United States primarily through wholesale distributors and specialty contracted pharmacies. Therefore, wholesale distributors and large pharmacy chains account for a large portion of our U.S. trade receivables and net product revenues (See Note 19). International sales are primarily made directly to hospitals, clinics and retail chains, many of which in Europe are government owned and have extended their payment terms in recent years given the economic pressure these countries are facing. We continuously monitor the creditworthiness of our customers, including these governments, and have internal policies regarding customer credit limits. We estimate an allowance for doubtful accounts primarily based on the credit worthiness of our customers, historical payment patterns, aging of receivable balances and general economic conditions, including publicly available information on the credit worthiness of countries themselves and provinces or areas within such countries where they are the ultimate customers.

We continue to monitor economic conditions, including the volatility associated with international economies, the sovereign debt crisis in certain European countries and associated impacts on the financial markets and our business. Our current business model in these markets is typically to sell our products directly to principally government owned or controlled hospitals, which in turn directly deliver critical care to patients. Our products are used to treat life-threatening diseases and we believe this business model enables timely delivery and adequate supply of products. Many of the outstanding receivable balances are related to government-funded hospitals and we believe the receivable balances are ultimately collectible. Similarly, we believe that future sales to these customers will continue to be collectible.

The credit and economic conditions within Spain, Italy, Portugal and Greece, as well as increasing sales levels in those countries have in the past resulted in, and may continue to result in, an increase in the average length of time it takes to collect accounts receivable. Our total net receivables in Spain, Italy and Portugal are composed almost entirely of amounts receivable from government-owned or controlled hospitals and the public sector and amounted to $187.8 million at December 31, 2015, compared to $241.8 million at December 31, 2014. Approximately $31.3 million of the $187.8 million receivable at December 31, 2015 was greater than one year past due. Our exposure to the sovereign debt crisis in Greece is limited, as we do not have a material amount of receivables in Greece. We maintain timely and direct communication with hospital customers in Spain, Italy and Portugal regarding both the current and past due receivable balances. We continue to receive payments from these countries and closely monitor the plans for payment at the regional government level. Payments from customers in these countries are not received on regular intervals and several months could elapse between significant payments. We also regularly request and receive positive confirmation of the validity of our receivables from most of the regional governmental authorities.

68

CELGENE CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

In determining the appropriate allowance for doubtful accounts for Spain, Italy and Portugal, we considered the balance of past due receivables related to sales made to government-owned or supported customers. We regularly monitor developments in Europe to assess whether the level of risk of default for any customers has increased and note the ongoing efforts by the European Union, European Monetary Union and International Monetary Fund to support countries with large public deficits and outstanding debt balances. We also monitor the efforts of individual countries to support their regions with large public deficits and outstanding debt balances. We have not experienced significant losses or write-offs with respect to the collection of our accounts receivable in these countries as a result of their economic difficulties and we do not expect to have write-offs or adjustments to accounts receivable that would have a material adverse impact on our financial position or results of operations.

Inventory: Inventories are recorded at the lower of cost or market, with cost determined on a first-in, first-out basis. We periodically review the composition of inventory in order to identify obsolete, slow-moving or otherwise non-saleable items. If non-saleable items are observed and there are no alternate uses for the inventory, we will record a write-down to net realizable value in the period that the decline in value is first recognized. Included in inventory are raw materials used in the production of preclinical and clinical products, which are charged to research and development expense when consumed.

We capitalize inventory costs associated with certain products prior to regulatory approval of products, or for inventory produced in new production facilities, when management considers it highly probable that the pre-approval inventories will be saleable. The determination to capitalize is based on the particular facts and circumstances relating to the expected regulatory approval of the product or production facility being considered, and accordingly, the time frame within which the determination is made varies from product to product. The assessment of whether or not the product is considered highly probable to be saleable is made on a quarterly basis and includes, but is not limited to, how far a particular product or facility has progressed along the approval process, any known safety or efficacy concerns, potential labeling restrictions and other impediments. We could be required to write down previously capitalized costs related to pre-launch inventories upon a change in such judgment, or due to a denial or delay of approval by regulatory bodies, a delay in commercialization or other potential factors.

Property, Plant and Equipment: Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation of plant and equipment is recorded using the straight-line method. Building improvements are depreciated over the remaining useful life of the building. Leasehold improvements are depreciated over the lesser of the economic useful life of the asset or the remaining term of the lease, including anticipated renewal options. The estimated useful lives of capitalized assets are as follows:

Buildings	40 years
Building and operating equipment	15 years
Manufacturing machinery and equipment	10 years
Other machinery and equipment	5 years
Furniture and fixtures	5 years
Computer equipment and software	3-7 years

Maintenance and repairs are charged to operations as incurred, while expenditures for improvements which extend the life of an asset are capitalized.

Capitalized Software Costs: We capitalize software costs incurred in connection with developing or obtaining software. Capitalized software costs are included in property, plant and equipment, net and are amortized over their estimated useful life of three to seven years from the date the systems are ready for their intended use.

Investments in Other Entities: We hold a portfolio of investments in equity securities and certain investment funds that are accounted for under either the equity method or cost method. Investments in companies or certain investment funds over which we have significant influence but not a controlling interest are accounted for using the equity method, with our share of earnings or losses reported in other income (expense), net. Our equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements, are designated as marketable securities available for sale. Investments in equity securities of companies that become publicly traded are accounted for as available-for-sale marketable securities prospectively from the date of such companies' initial public offering if we are not restricted from selling our investment for greater than one year. Our cost method and equity method investments are included in other assets on the Consolidated Balance Sheets.

All investments are reviewed on a regular basis for possible impairment. If an investment's fair value is determined to be less than its net carrying value and the decline is determined to be other-than-temporary, the investment is written down to its fair value.

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Such an evaluation is judgmental and dependent on specific facts and circumstances. Factors considered in determining whether an other-than-temporary decline in value has occurred include: market value or exit price of the investment based on either market-quoted prices or future rounds of financing by the investee; length of time that the market value was below its cost basis; financial condition and business prospects of the investee; our intent and ability to retain the investment for a sufficient period of time to allow for recovery in market value of the investment; issues that raise concerns about the investee's ability to continue as a going concern; any other information that we may be aware of related to the investment.

Other Intangible Assets: Intangible assets with definite useful lives are amortized to their estimated residual values over their estimated useful lives and reviewed for impairment if certain events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Amortization is initiated for in-process research and development (IPR&D) intangible assets when their useful lives have been determined. IPR&D intangible assets which are determined to have had a drop in their fair value are adjusted downward and an expense recognized in the income statement. These IPR&D intangible assets are tested at least annually or when a triggering event occurs that could indicate a potential impairment.

Goodwill: Goodwill represents the excess of purchase price over fair value of net assets acquired in a business combination accounted for by the acquisition method of accounting and is not amortized, but is subject to impairment testing.  We test our goodwill for impairment at least annually or when a triggering event occurs that could indicate a potential impairment by assessing qualitative factors or performing a quantitative analysis in determining whether it is more likely than not that the fair value of net assets are below their carrying amounts.

Impairment of Long-Lived Assets: Long-lived assets, such as property, plant and equipment and certain other long-term assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.

Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset or asset group to the estimated undiscounted future cash flows expected to be generated by the asset or asset group. If the carrying amount of the assets exceed their estimated future undiscounted net cash flows, an impairment charge is recognized for the amount by which the carrying amount of the assets exceed the fair value of the assets.

Contingent Consideration from Business Combinations: Subsequent to the acquisition date, we measure contingent consideration arrangements at fair value for each period with changes in fair value recognized in income as acquisition related charges, net. Changes in fair values reflect new information about related IPR&D and other assets and the passage of time. In the absence of new information, changes in fair value reflect only the passage of time as development work towards the achievement of the milestones progresses, and is accrued based on an accretion schedule.

Foreign Currency Translation: Operations in non-U.S. entities are recorded in the functional currency of each entity. For financial reporting purposes, the functional currency of an entity is determined by a review of the source of an entity's most predominant cash flows. The results of operations for non-U.S. dollar functional currency entities are translated from functional currencies into U.S. dollars using the average currency rate during each month, which approximates the results that would be obtained using actual currency rates on the dates of individual transactions. Assets and liabilities are translated using currency rates at the end of the period. Adjustments resulting from translating the financial statements of our foreign entities into the U.S. dollar are excluded from the determination of net income and are recorded as a component of other comprehensive income (loss). Transaction gains and losses are recorded in other income (expense), net in the Consolidated Statements of Income. We had a net foreign exchange loss of $11.7 million in 2015, a loss of $9.5 million in 2014, and a gain of $22.2 million in 2013. These amounts include the impact of gains and losses on foreign exchange contracts not designated as hedging instruments (See Note 5).

Research and Development Costs: Research and development costs are expensed as incurred. These include all internal and external costs related to services contracted by us. Upfront and milestone payments made to third parties in connection with research and development collaborations are expensed as incurred up to the point of regulatory approval. Milestone payments made to third parties upon regulatory approval are capitalized and amortized over the remaining useful life of the related product. Upfront payments are recorded when incurred, and milestone payments are recorded when the specific milestone has been achieved.

Income Taxes: We utilize the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement carrying amounts and tax bases of assets and liabilities using enacted tax rates in effect for years in which the temporary differences are expected to reverse. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. We recognize the benefit of an uncertain tax position that we have taken or expect to take on income tax returns we file if such tax position is more likely than not to be sustained.

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Revenue Recognition: Revenue from the sale of products is recognized when title and risk of loss of the product is transferred to the customer and the sales price is fixed and determinable. Provisions for discounts, early payments, rebates, sales returns and distributor chargebacks under terms customary in the industry are provided for in the same period the related sales are recorded. We record estimated reductions to revenue for volume-based discounts and rebates at the time of the initial sale. The estimated reductions to revenue for such volume-based discounts and rebates are based on the sales terms, historical experience and trend analysis.

We base our sales returns allowance on estimated on-hand retail/hospital inventories, measured end-customer demand as reported by third-party sources, actual returns history and other factors, such as the trend experience for lots where product is still being returned or inventory centralization and rationalization initiatives conducted by major pharmacy chains, as applicable.  If the historical data we use to calculate these estimates do not properly reflect future returns, then a change in the allowance would be made in the period in which such a determination is made and revenues in that period could be materially affected.  Under this methodology, we track actual returns by individual production lots.  Returns on closed lots, that is, lots no longer eligible for return credits, are analyzed to determine historical returns experience.  Returns on open lots, that is, lots still eligible for return credits, are monitored and compared with historical return trend rates.  Any changes from the historical trend rates are considered in determining the current sales return allowance. 

Sales discount accruals are based on payment terms extended to customers.

Government rebate accruals are based on estimated payments due to governmental agencies for purchases made by third parties under various governmental programs. U.S. Medicaid rebate accruals are generally based on historical payment data and estimates of future Medicaid beneficiary utilization applied to the Medicaid unit rebate formula established by the Center for Medicaid and Medicare Services. The Medicaid rebate percentage was increased and extended to Medicaid Managed Care Organizations in March 2010. The accrual of the rebates associated with Medicaid Managed Care Organizations is calculated based on estimated historical patient data related to Medicaid Managed Care Organizations. We also analyze actual billings received from the states to further support the accrual rates. Subsequent to implementation of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, the 2010 U.S. Health Care Reform Law), certain states have not completed their Medicaid Managed Care Organization billing for the years of 2010 through 2015. Our accruals for these Medicaid Managed Care Organization rebates had been at elevated levels given the delays in the receipt of complete invoices from certain states. Due to the receipt of more complete claims data during 2013, 2014 and 2015, the accruals for certain states were reduced from these elevated levels as a result of both payments being applied to the accrual during 2013, 2014 and 2015 and changes in estimate of the ultimate obligation during the fourth quarters of 2013, 2014 and 2015. We will continue to adjust the rebate accruals as more information becomes available and to reflect actual claims experience. Manufacturers of pharmaceutical products are responsible for 50% of the patient’s cost of branded prescription drugs related to the Medicare Part D Coverage Gap. In order to estimate the cost to us of this coverage gap responsibility, we analyze data for eligible Medicare Part D patients against data for eligible Medicare Part D patients treated with our products as well as the historical invoices. This expense is recognized throughout the year as costs are incurred. In certain international markets government-sponsored programs require rebates to be paid based on program specific rules and, accordingly, the rebate accruals are determined primarily on estimated eligible sales.

Rebates or administrative fees are offered to certain wholesale customers, group purchasing organizations and end-user customers, consistent with pharmaceutical industry practices. Settlement of rebates and fees may generally occur from one to 15 months from the date of sale. We record a provision for rebates at the time of sale based on contracted rates and historical redemption rates. Assumptions used to establish the provision include level of wholesaler inventories, contract sales volumes and average contract pricing. We regularly review the information related to these estimates and adjust the provision accordingly.

Chargeback accruals are based on the differentials between product acquisition prices paid by wholesalers and lower government contract pricing paid by eligible customers covered under federally qualified programs. Distributor service fee accruals are based on contractual fees to be paid to the wholesale distributor for services provided. TRICARE is a health care program of the U.S. Department of Defense Military Health System that provides civilian health benefits for military personnel, military retirees and their dependents. TRICARE rebate accruals are included in chargeback accruals and are based on estimated Department of Defense eligible sales multiplied by the TRICARE rebate formula.

We record estimated reductions to revenue for free goods and volume-based discounts at the time of the initial sale. The estimated reductions to revenue for such free goods and volume-based discounts are based on the sales terms, historical experience and trend analysis. The cost of free goods is included in cost of goods sold (excluding amortization of acquired intangible assets).

We recognize revenue from royalties based on licensees' sales of our products or products using our technologies. Royalties are recognized as earned in accordance with the contract terms when royalties from licensees can be reasonably estimated and

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collectability is reasonably assured. If royalties cannot be reasonably estimated or collectability of a royalty amount is not reasonably assured, royalties are recognized as revenue when the cash is received.

Share-Based Compensation: We utilize share based compensation in the form of stock options, restricted stock units (RSUs) and performance-based restricted stock units (PSUs). Compensation expense is recognized in the Consolidated Statements of Income based on the estimated fair value of the awards at grant date. Compensation expense recognized reflects an estimate of the number of awards expected to vest after taking into consideration an estimate of award forfeitures based on actual experience and is recognized on a straight-line basis over the requisite service period, which is generally the vesting period required to obtain full vesting. Management expectations related to the achievement of performance goals associated with PSU grants is assessed regularly and that assessment is used to determine whether PSU grants are expected to vest. If performance-based milestones related to PSU grants are not met or not expected to be met, any compensation expense recognized to date associated with grants that are not expected to vest will be reversed.

The fair values of stock option grants are estimated as of the date of grant using a Black-Scholes option valuation model. The fair values of RSU and PSU grants that are not based on market performance are based on the market value of our Common Stock on the date of grant. Certain of our PSU grants are measured based on the achievement of specified performance and market targets, including non-GAAP revenue, non-GAAP earnings per share, and relative total shareholder return. The grant date fair value for the portion of the PSUs related to non-GAAP revenue and non-GAAP earnings per share is estimated using the fair market value of our common stock on the grant date. The grant date fair value for the portion of the PSUs related to relative total shareholder return is estimated using the Monte Carlo valuation model.

Earnings Per Share: Basic earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period, assuming potentially dilutive common shares resulting from option exercises, RSUs, PSUs, warrants and other incentives had been issued and any proceeds thereof used to repurchase common stock at the average market price during the period. The assumed proceeds used to repurchase common stock is the sum of the amount to be paid to us upon exercise of options, the amount of compensation cost attributed to future services and not yet recognized and, if applicable, the amount of excess income tax benefit that would be credited to paid-in capital upon exercise.

New Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (ASU 2014-09). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under U.S. GAAP and requires revenue to be recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. Additionally, qualitative and quantitative disclosures are required about customer contracts, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. This accounting guidance is effective for us beginning in the first quarter of 2018 using one of two prescribed transition methods. We are currently evaluating the effect that the updated standard and transition method will have on our consolidated financial statements and related disclosures.

In April 2015, the FASB issued Accounting Standards Update No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs" (ASU 2015-03). ASU 2015-03 will more closely align the presentation of debt issuance costs under U.S. GAAP with the presentation under comparable IFRS standards by requiring that debt issuance costs be presented on the balance sheet as a direct deduction from the carrying amount of the related debt liability, similar to the presentation of debt discounts or premiums. This accounting guidance is effective for us beginning in the first quarter of 2016. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In April 2015, the FASB issued Accounting Standards Update No. 2015-05, "Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement" (ASU 2015-05). ASU 2015-05 provides guidance to help companies evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The new guidance clarifies that if a cloud computing arrangement includes a software license, the customer should account for the license consistent with its accounting for other software licenses. If the arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 is effective for us beginning in the first quarter of 2016. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In July 2015, the FASB issued Accounting Standards Update No. 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory" (ASU 2015-11). ASU 2015-11 applies only to inventory for which cost is determined by methods other than last-in, first-out and the retail inventory method, which includes inventory that is measured using first-in, first-out or average cost. Inventory within the scope of this standard is required to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal,

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and transportation. The new standard will be effective for us on January 1, 2017. We are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures.

In August 2015, the FASB issued Accounting Standards Update No. 2015-15, "Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements" (ASU 2015-15). ASU 2015-15 clarifies the presentation and subsequent measurement of debt issuance costs associated with lines of credit. These costs may be presented as an asset and amortized ratably over the term of the line of credit arrangement, regardless of whether there are outstanding borrowings on the arrangement. The effective date will be the first quarter of fiscal year 2017 and will be applied retrospectively. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In September 2015, the FASB issued Accounting Standards Update No. 2015-16, "Simplifying the Accounting for Measurement-Period Adjustments" (ASU 2015-16). ASU 2015-16 replaces the requirement that an acquirer in a business combination account for measurement period adjustments retrospectively with a requirement that an acquirer recognize adjustments to the provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. ASU 2015-16 will be effective for us beginning in the first quarter of 2016. The guidance is to be applied prospectively to adjustments to provisional amounts that occur after the effective date of the guidance, with earlier application permitted for financial statements that have not been issued. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In November 2015, the FASB issued Accounting Standards Update No. 2015-17, "Balance Sheet Classification of Deferred Taxes" (ASU 2015-17). ASU 2015-17 requires companies to classify all deferred tax assets and liabilities and associated valuation allowances as non-current on the balance sheet instead of separating deferred taxes and associated valuation allowances into current and non-current amounts. The update may be adopted on either a prospective or retrospective basis with early adoption permitted. In order to simplify the presentation of deferred income taxes, we have chosen to adopt ASU 2015-17 in the fourth quarter of 2015 on a prospective basis. Prior periods were not retrospectively adjusted.

In January 2016, the FASB issued Accounting Standards Update 2016-01, "Financial Instruments–Overall: Recognition and Measurement of Financial Assets and Financial Liabilities" (ASU 2016-01). ASU 2016-01 changes accounting for equity investments, financial liabilities under the fair value option, and presentation and disclosure requirements for financial instruments. ASU 2016-01 does not apply to equity investments in consolidated subsidiaries or those accounted for under the equity method of accounting. In addition, the FASB clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. Equity investments with readily determinable fair values will be measured at fair value with changes in fair value recognized in net income. Companies have the option to either measure equity investments without readily determinable fair values at fair value or at cost adjusted for changes in observable prices minus impairment. Changes in measurement under either alternative will be recognized in net income. Companies that elect the fair value option for financial liabilities must recognize changes in fair value related to instrument-specific credit risk in other comprehensive income. Companies must assess valuation allowances for deferred tax assets related to available-for-sale debt securities in combination with their other deferred tax assets. ASU 2016-01 will be effective for us beginning in the first quarter of 2018 and early adoption is available to publicly traded companies for the provision to record fair value changes for financial liabilities under the fair value option resulting from instrument-specific credit risk in other comprehensive income. We expect the implementation of this standard to have an impact on our consolidated financial statements and related disclosures, as we held publicly traded equity investments at December 31, 2015 with a fair value of $1.236 billion, as well as equity investments accounted for under the cost method. A cumulative-effect adjustment to the balance sheet will be recorded as of the beginning of the fiscal year of adoption. The implementation of ASU 2016-01 is expected to increase volatility in our net income as the volatility currently recorded in other comprehensive income related to changes in the fair market value of available for sale equity investments will be reflected in net income after adoption.

2.     Acquisitions

Receptos, Inc. (Receptos): On August 27, 2015 (Acquisition Date), we acquired all of the outstanding common stock of Receptos, resulting in Receptos becoming our wholly-owned subsidiary. Receptos' lead drug candidate, ozanimod, is a small molecule that modulates sphingosine 1-phosphate 1 and 5 receptors and it is in development for immune-inflammatory indications, including inflammatory bowel disease and relapsing multiple sclerosis (RMS). In clinical trial results, ozanimod demonstrated several areas of potential advantage over existing oral therapies for the treatment of ulcerative colitis (UC) and RMS, including its cardiac, hepatotoxicity and lymphocyte recovery profile. The phase III TRUE NORTH trial in UC is currently underway with data expected in 2018. The phase III RADIANCE and SUNBEAM RMS trials are ongoing and data are expected in the first half of 2017. The acquisition of Receptos also included RPC4046, an anti-interleukin-13 (IL-13) antibody in development for eosinophilic

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esophagitis (EoE), an allergic/immune-mediated orphan disease. RPC4046 was licensed from AbbVie Bahamas Ltd. and AbbVie Inc. (collectively referred to as AbbVie) and is currently in phase II testing for EoE. The results of operations for Receptos are included in our consolidated financial statements from the Acquisition Date and the assets and liabilities of Receptos have been recorded at their respective fair values on the Acquisition Date and consolidated with our assets and liabilities.

We paid approximately $7.626 billion, consisting of $7.311 billion for common stock outstanding and $0.315 billion for the portion of equity compensation attributable to the pre-combination period. In addition, we paid $0.197 billion for the portion of equity compensation attributable to the post-combination service period, which has been recorded as expense over the required service period ending in the fourth quarter of 2015.

The acquisition has been accounted for using the acquisition method of accounting which requires that assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date and requires the fair value of acquired IPR&D to be classified as indefinite-lived assets until the successful completion or abandonment of the associated research and development efforts. A preliminary purchase price allocation has been performed and the recorded amounts for intangible assets, goodwill and associated deferred tax assets and liabilities are subject to change pending finalization of valuation efforts.

The amounts recognized will be finalized as the information necessary to complete the analysis is obtained, but no later than one year after the acquisition date.

The total cash consideration for the acquisition of Receptos is summarized as follows:

	Total Consideration
Cash paid for outstanding common stock	$	7,311.3
Cash for equity compensation attributable to pre-combination service	314.9
Total consideration	$	7,626.2

The preliminary purchase price allocation resulted in the following amounts being allocated to the assets acquired and liabilities assumed at the acquisition date based upon their respective preliminary fair values summarized below. During the fourth quarter of 2015, adjustments have been recorded to increase the amounts initially recorded for deferred tax assets, deferred tax liabilities and goodwill as of the Acquisition Date. The amounts recognized will be finalized as the information necessary to complete the analyses is obtained, but no later than one year from the Acquisition Date.

	Amounts Recognized as of the Acquisition Date (Provisional)
Working capital (1)	$	479.2
Property, plant and equipment	5.0
In-process research and development product rights	6,842.0
Current deferred tax assets	241.3
Other non-current assets	7.9
Non-current deferred tax liabilities(2)	(2,519.2		)
Total identifiable net assets	5,056.2
Goodwill	2,570.0
Total net assets acquired	$	7,626.2

⁽¹⁾  Includes cash and cash equivalents, available-for-sale marketable securities, other current assets, accounts payable and other current liabilities.

⁽²⁾ Upon integration of the acquired intangible assets into our offshore research, manufacturing, and commercial operations, the deferred tax liability was reclassified to a non-current tax liability. (See Note 16)

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The fair values of current assets, current liabilities and property, plant and equipment were determined to approximate their book values.

The fair value assigned to acquired IPR&D was based on the present value of expected after-tax cash flows attributable to ozanimod, which is in phase II and III testing. The present value of expected after-tax cash flows attributable to ozanimod and assigned to IPR&D was determined by estimating the after-tax costs to complete development of ozanimod into a commercially viable product, estimating future revenue and ongoing expenses to produce, support and sell ozanimod, on an after-tax basis, and discounting the resulting net cash flows to present value. The revenue and costs projections used were reduced based on the probability that compounds at similar stages of development will become commercially viable products. The rate utilized to discount the net cash flows to their present value reflects the risk associated with the intangible asset and is benchmarked to the cost of equity. Acquired IPR&D will be accounted for as an indefinite-lived intangible asset until regulatory approval in a major market or discontinuation of development.

The excess of purchase price over the fair value amounts assigned to identifiable assets acquired and liabilities assumed represents the goodwill amount resulting from the acquisition. The goodwill recorded as part of the acquisition is primarily attributable to the broadening of our product portfolio and research capabilities in the inflammation and immunology therapeutic area, the assembled workforce and the deferred tax consequences of the IPR&D asset recorded for financial statement purposes. We do not expect any portion of this goodwill to be deductible for tax purposes. The goodwill attributable to the acquisition has been recorded as a non-current asset in our Consolidated Balance Sheets and is not amortized, but is subject to review for impairment annually.

As a result of the exclusive development license from AbbVie for RPC4046 that Receptos held prior to our acquisition of Receptos, AbbVie holds an option to enter into a global collaboration for RPC4046 with us following the availability of results from the current phase II study. If AbbVie does not exercise its option, we will have an exclusive worldwide license for the development and commercialization of RPC4046 that will be unlimited as to indications. We do not consider this potential collaboration arrangement to be significant.

From the Acquisition Date through December 31, 2015, our Consolidated Statements of Income included expenses of $380.5 million associated with the acquisition and operations of Receptos as follows⁽¹⁾:

Statements of Income Location	Acquisition Date Through December 31, 2015
Research and development	$	78.6
Selling, general and administrative	5.1
Acquisition related charges and restructuring, net (2)	296.8
Total	$	380.5

⁽¹⁾ In addition, Celgene incurred $19.9 million of acquisition related costs prior to the acquisition date.

⁽²⁾ Consists of acquisition-related compensation expense and transaction costs.

Pro Forma Financial Information:

The following table provides unaudited pro forma financial information for the twelve-month periods ended December 31, 2015 and 2014 as if the acquisition of Receptos had occurred on January 1, 2014.

	Twelve-Month Periods Ended December 31,
	2015		2014
Total revenue	$	9,256.0	$	7,676.3
Net income	$	1,630.8	$	1,499.9
Net income per common share: basic	$	2.06	$	1.87
Net income per common share: diluted	$	1.98	$	1.79

The unaudited pro forma financial information was prepared using the acquisition method of accounting and was based on the historical financial information of Celgene and Receptos. The pro-forma financial information assumes that the acquisition-related transaction fees and costs incurred were removed from the twelve-month period ended December 31, 2015 and were assumed to

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have been incurred during the first quarter of 2014. The unaudited pro forma results do not reflect any operating efficiencies or potential cost savings that may result from the combined operations of Celgene and Receptos. Accordingly, these unaudited pro forma results are presented for illustrative purposes and are not intended to represent or be indicative of the actual results of operations of the combined company that would have been achieved had the acquisition occurred at the beginning of the period presented, nor are they intended to represent or be indicative of future results of operations.

Quanticel Pharmaceuticals, Inc. (Quanticel): On October 19, 2015, we completed our previously announced acquisition of Quanticel, a privately held biotechnology company focused on cancer drug discovery, for consideration consisting of $95.9 million in cash at closing plus contingent consideration consisting of future payments of up to $385.0 million for achieving specified discovery and development targets. We have had a research collaboration arrangement with Quanticel since 2011. Through this purchase, Quanticel has become our wholly-owned subsidiary, and we will benefit from full access to Quanticel’s proprietary platform for the single-cell genomic analysis of human cancer, as well as Quanticel’s programs that target specific epigenetic modifiers, which we expect will advance our pipeline of innovative cancer therapies.

The acquisition was accounted for using the acquisition method of accounting for business combinations which requires the assets and liabilities of Quanticel to be recorded at their respective fair values on the acquisition date and consolidated into our Consolidated Balance Sheets. The results of operations for Quanticel have been included in our consolidated financial statements from the date of acquisition.

The fair value of consideration transferred in the acquisition of Quanticel is shown in the table below:

	Fair Value at the Acquisition Date
Cash	$	95.9
Fair value of pre-existing equity ownership	11.4
Contingent consideration	166.0
Total fair value of consideration	$	273.3

Prior to the acquisition of Quanticel, we had an equity interest equal to approximately 5% of the company’s total capital stock (on an “as converted” basis). Based on the fair market value of this interest derived from the purchase price, we recognized a gain of $10.3 million, which is reflected as a component of other income (expense), net within our Consolidated Statement of Income for the year ended December 31, 2015.

Our potential contingent consideration payments are classified as liabilities, which were measured at fair value as of the acquisition date, with $82.3 million classified as current liabilities and $83.7 million classified as non-current liabilities. We estimated the fair value of potential contingent consideration using a probability-weighted discounted cash flow approach, which reflects the probability and timing of future potential payments. This fair value measurement is based on significant inputs that are not observable in the market and thus represents a level three liability within the fair value hierarchy. The resulting probability-weighted cash flows were discounted using a discount rate based on a market participant assumption. See Note 4 for post-acquisition changes in fair value. The preliminary purchase price allocation resulted in the following amounts being allocated to the assets acquired and liabilities assumed at the acquisition date based upon their respective preliminary fair values summarized below. The amounts recognized will be finalized as the information necessary to complete the analyses is obtained, but no later than one year from the acquisition date.

	Fair Value at October 19, 2015 (Provisional)
Working capital (1)	$	7.0
Property, plant and equipment	1.9
Other non-current assets	0.8
Technology platform intangible asset(2)	232.0
Debt obligations	(13.9		)
Non-current deferred tax liabilities	(72.3		)
Total identifiable net assets	155.5
Goodwill	117.8
Total net assets acquired	$	273.3

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⁽¹⁾  Includes cash and cash equivalents, available-for-sale marketable securities, other current assets, accounts payable and other current liabilities.

⁽²⁾ Technology platform related to Quanticel’s proprietary technology platform for the single-cell genomic analysis of human cancer.

The fair values of current and other non-current assets, property, plant and equipment, current liabilities and debt were determined to approximate their book values.

The fair value of the technology platform intangible asset is equal to the present value of the after-tax cash flows attributable to the intangible asset, which was calculated based on the multi-period excess earnings method of the income approach. The multi-period excess earnings method of the income approach included estimating probability adjusted annual after-tax net cash flows through the cycle of development and commercialization of potential products generated by the technology platform then discounting the resulting probability adjusted net post-tax cash flows using a discount rate commensurate with the risk of our overall business operations to arrive at the net present value.

The excess of purchase price over the fair value amounts assigned to the identifiable assets acquired and liabilities assumed represents the goodwill amount resulting from the acquisition. The goodwill recorded as part of the acquisition is largely attributable to the deferred tax consequences of the finite-lived technology platform intangible asset recorded for financial statement purposes, as well as intangible assets that do not qualify for separate recognition at the time of the acquisition. We do not expect any portion of this goodwill to be deductible for tax purposes. Goodwill attributable to the acquisition has been recorded as a non-current asset in our Consolidated Balance Sheets and is not amortized, but is subject to review for impairment annually.

The results of operations and cash flows from Quanticel are included in our consolidated financial statements as of October 19, 2015. Pro forma supplemental financial information is not provided as the impact of the Quanticel acquisition was not material to our results of operations in 2015.

Nogra Pharma Limited (Nogra): On April 23, 2014, we entered into a license agreement with Nogra, pursuant to which Nogra granted us an exclusive, royalty-bearing license for its intellectual property relating to GED-0301, an antisense oligonucleotide targeting Smad7, to develop and commercialize products containing GED-0301 for the treatment of Crohn’s disease and other indications. A phase II trial of GED-0301 in patients with active Crohn's disease has been completed and we have initiated a multi-trial clinical program that is designed to support global registrations of GED-0301 in Crohn's disease.

Under the terms of the agreement, which became effective on May 14, 2014 after receipt of certain governmental clearances and approvals, we made an upfront payment of $710.0 million and may make additional contingent developmental, regulatory and sales milestone payments as well as payments based on percentages of annual sales of licensed products. The maximum aggregate amount payable for development and regulatory milestones is approximately $815.0 million, which covers such milestones relating to Crohn’s disease and other indications. Starting from global annual net sales of $500.0 million, aggregate tiered sales milestone payments could total a maximum of $1.050 billion if global annual net sales reach $4.000 billion.

The development and application of the intellectual property covered under the license agreement will be managed by joint committees composed of members from each of Nogra and us. We have the tie-breaking vote on the joint steering committee and as such have ultimate decision-making authority for development, regulatory and commercialization decisions. The agreement also includes provisions for access to employees of Nogra, technical assistance, transfer of manufacturing agreements and transfer of Nogra know-how related to GED-0301. Based on the foregoing factors, for accounting purposes, we have concluded that the acquired assets meet the definition of a business and have accounted for the GED-0301 license as IPR&D acquired in a business combination. The acquisition method of accounting requires that (a) the assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date and (b) the fair value of IPR&D be classified as an indefinite-lived asset until the successful completion or abandonment of the associated research and development efforts. Pro-forma results of operations for this acquisition have not been presented because this acquisition is not material to our consolidated results of operations.

The fair value of consideration transferred to acquire the license amounted to:

	Fair Value at the Acquisition Date
Cash	$	710.0
Contingent consideration	1,060.0
Total fair value of consideration	$	1,770.0

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Our potential contingent consideration payments are classified as liabilities, which were measured at fair value as of the acquisition date, with $5.0 million classified as current liabilities and $1.055 billion classified as non-current liabilities. We estimated the fair value of potential contingent consideration using a probability-weighted income approach, which reflects the probability and timing of future potential payments. This fair value measurement is based on significant inputs that are not observable in the market and thus represents a level three liability within the fair value hierarchy. The resulting probability-weighted cash flows were discounted using a discount rate based on a market participant assumption. See Note 4 for post-acquisition changes in fair value. The purchase price allocation resulted in the following amounts being allocated to the assets acquired at the acquisition date based on their respective fair values:

	Fair Value at the Acquisition Date
In-process research and development product rights	$	1,620.0
Current deferred tax assets	1.3
Non-current deferred tax liabilities, net	(1.3		)
Total identifiable net assets	1,620.0
Goodwill	150.0
Total net assets acquired	$	1,770.0

The fair value of the acquired IPR&D asset was based on the present value of expected net cash flows from the GED-0301 product candidate. Net cash flows were determined by estimating future sales, net of the costs to complete development of GED-0301 into a commercially viable product. Estimated net cash flows were adjusted to reflect the probability of successfully developing a new drug from a product candidate that has completed a phase II trial. Additionally, the projections considered the relevant market sizes and growth factors and the nature and expected timing of a new product introduction. The resulting net cash flows from such potential products include our estimates of cost of sales, operating expenses, and income taxes. The rates utilized to discount the net cash flows to their present value were commensurate with the stage of development of the project and uncertainties in the economic estimates used in the projections described above. The acquired IPR&D asset is accounted for as an indefinite-lived intangible asset until regulatory approval in a major market or discontinuation.

The excess of purchase price over the fair value amounts assigned to the assets acquired represents the goodwill amount resulting from the acquisition. The goodwill recorded as part of the acquisition is largely attributable to intangible assets that do not qualify for separate recognition. We expect this goodwill to be deductible for tax purposes.

The license agreement may be terminated (i) at our discretion upon 180 days’ written notice to Nogra, provided that such termination will not become effective before May 14, 2017, and (ii) by either party upon material breach of the other party, subject to cure periods. Upon the expiration of our royalty payment obligations under the license agreement, on a country-by-country and licensed product-by-licensed product basis, the license granted under the license agreement will become fully paid-up, irrevocable, perpetual, and non-terminable with respect to such licensed product in such country.

3.     Earnings Per Share

	2015		2014		2013
Net income	$	1,602.0	$	1,999.9	$	1,449.9
Weighted-average shares:
Basic	792.2		802.7		827.7
Effect of dilutive securities:
Options, RSUs, PSUs, warrants and other	32.7		33.3		32.9
Diluted	824.9		836.0		860.6
Net income per share:
Basic	$	2.02	$	2.49	$	1.75
Diluted	$	1.94	$	2.39	$	1.68

The total number of potential shares of common stock excluded from the diluted earnings per share computation because their inclusion would have been anti-dilutive was 14.1 million in 2015, 18.7 million in 2014 and 14.3 million in 2013.

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During the period of April 2009 through December 2015, our Board of Directors approved repurchases of up to an aggregate of $17.500 billion of our common stock, including the authorization in June 2015 to repurchase an additional $4.000 billion of our common stock.

As part of the management of our share repurchase program, we may, from time to time, sell put options on our common stock with strike prices that we believe represent an attractive price to purchase our shares. If the trading price of our shares exceeds the strike price of the put option at the time the option expires, we will have economically reduced the cost of our share repurchase program by the amount of the premium we received from the sale of the put option. If the trading price of our stock is below the strike price of the put option at the time the option expires, we would purchase the shares covered by the option at the strike price of the put option. During 2015 and 2014, we recorded net losses of $9.9 million and net gains of $11.6 million, respectively, from selling put options on our common stock. At December 31, 2015, we had no outstanding put options.

We repurchased 28.1 million shares of common stock under the program from all sources during 2015 at a total cost of $3.257 billion. As of December 31, 2015, we had a remaining open-ended repurchase authorization of $3.890 billion.

4.     Financial Instruments and Fair Value Measurement

The table below presents information about assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2015 and 2014, and the valuation techniques we utilized to determine such fair value. 

• Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities. Our Level 1 assets consist of marketable equity securities. Our Level 1 liability relates to our publicly traded Contingent Value Rights (CVRs). See Note 18 for a description of the CVRs. 

• Level 2 inputs utilize observable quoted prices for similar assets and liabilities in active markets and observable quoted prices for identical or similar assets in markets that are not very active. Our Level 2 assets consist primarily of U.S. Treasury securities, U.S. government-sponsored agency securities, U.S. government-sponsored agency MBS, non-U.S. government, agency and supranational securities, global corporate debt securities, asset backed securities, foreign currency forward contracts, purchased foreign currency options and interest rate swap contracts. Our Level 2 liabilities relate to written foreign currency options, foreign currency forward contracts and interest rate swap contracts.

• Level 3 inputs utilize unobservable inputs and include valuations of assets or liabilities for which there is little, if any, market activity. We do not have any Level 3 assets. Our Level 3 liabilities consist of contingent consideration related to undeveloped product rights resulting from the acquisitions of Gloucester Pharmaceuticals, Inc. (Gloucester) and Nogra in addition to contingent consideration related to the undeveloped product rights and technology platforms acquired as part of the acquisitions of Avila Therapeutics, Inc. (Avila) and Quanticel. The maximum remaining potential payments related to the contingent consideration from the acquisitions of Gloucester, Avila and Quanticel are estimated to be $120.0 million, $555.0 million and $385.0 million, respectively, and $1.865 billion plus amounts based on sales pursuant to the license agreement with Nogra.

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	Balance at December 31, 2015			Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	$	1,671.6		$	1,235.9		$	435.7		$	—
Forward currency contracts	606.0			—			606.0			—
Purchased currency options	46.7			—			46.7			—
Interest rate swaps	52.5			—			52.5			—
Total assets	$	2,376.8		$	1,235.9		$	1,140.9		$	—
Liabilities:
Contingent value rights	$	(51.9	)	$	(51.9	)	$	—		$	—
Written currency options	(19.1		)	—			(19.1		)	—
Other acquisition related contingent consideration	(1,521.5		)	—			—			(1,521.5		)
Total liabilities	$	(1,592.5	)	$	(51.9	)	$	(19.1	)	$	(1,521.5	)

	Balance at December 31, 2014			Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	$	3,425.1		$	1,051.3		$	2,373.8		$	—
Forward currency contracts	550.7			—			550.7			—
Purchased currency options	9.8			—			9.8			—
Interest rate swaps	20.0			—			20.0			—
Total assets	$	4,005.6		$	1,051.3		$	2,954.3		$	—
Liabilities:
Contingent value rights	$	(136.3	)	$	(136.3	)	$	—		$	—
Written currency options	(4.6		)	—			(4.6		)	—
Other acquisition related contingent consideration	(1,279.0		)	—			—			(1,279.0		)
Total liabilities	$	(1,419.9	)	$	(136.3	)	$	(4.6	)	$	(1,279.0	)

There were no security transfers between Levels 1 and 2 during years ended December 31, 2015 and 2014. The following table represents a roll-forward of the fair value of Level 3 instruments:

	2015			2014
Liabilities:
Balance at beginning of period	$	(1,279.0	)	$	(228.5	)
Amounts acquired or issued	(166.0		)	(1,060.0		)
Net change in fair value	(76.5		)	(30.5		)
Settlements	—			40.0
Transfers in and/or out of Level 3	—			—
Balance at end of period	$	(1,521.5	)	$	(1,279.0	)

Level 3 liabilities outstanding as of December 31, 2015 primarily consisted of contingent consideration related to the acquisitions of Avila, Gloucester, Nogra and Quanticel. Level 3 liabilities outstanding increased by $242.5 million in 2015 compared to 2014. Amounts acquired or issued in 2015 represent $166.0 million from the October 2015 acquisition of Quanticel. The $76.5 million net increase in the fair value of Level 3 liabilities in 2015 was related to accretion of the fair value of our contingent consideration

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due to the passage of time, which was partly offset by reductions in the probability and delays in the assumed timing of certain contingent consideration milestones related to the acquisition of Avila. Changes to the fair value of contingent consideration are recorded on the Consolidated Statements of Income as acquisition related charges and restructuring, net.

5. Derivative Instruments and Hedging Activities

Our revenue and earnings, cash flows and fair values of assets and liabilities can be impacted by fluctuations in foreign exchange rates and interest rates. We actively manage the impact of foreign exchange rate and interest rate movements through operational means and through the use of various financial instruments, including derivative instruments such as foreign currency option contracts, foreign currency forward contracts, treasury rate lock agreements and interest rate swap contracts. In instances where these financial instruments are accounted for as cash flow hedges or fair value hedges, we may from time to time terminate the hedging relationship. If a hedging relationship is terminated we generally either settle the instrument or enter into an offsetting instrument.

Foreign Currency Risk Management

We maintain a foreign exchange exposure management program to mitigate the impact of volatility in foreign exchange rates on future foreign currency cash flows, translation of foreign earnings and changes in the fair value of assets and liabilities denominated in foreign currencies.

Through our revenue hedging program, we endeavor to reduce the impact of possible unfavorable changes in foreign exchange rates on our future U.S. dollar cash flows that are derived from foreign currency denominated sales. To achieve this objective, we hedge a portion of our forecasted foreign currency denominated sales that are expected to occur in the foreseeable future, typically within the next three years. We manage our anticipated transaction exposure principally with foreign currency forward contracts and occasionally foreign currency put and call options.

Foreign Currency Forward Contracts: We use foreign currency forward contracts to hedge specific forecasted transactions denominated in foreign currencies, manage exchange rate volatility in the translation of foreign earnings, and reduce exposures to foreign currency fluctuations of certain assets and liabilities denominated in foreign currencies.

We manage a portfolio of foreign currency forward contracts to protect against changes in anticipated foreign currency cash flows resulting from changes in foreign currency exchange rates, primarily associated with non-functional currency denominated revenues and expenses of foreign subsidiaries. The foreign currency forward hedging contracts outstanding at December 31, 2015 and December 31, 2014 had settlement dates within 36 months. The spot rate components of these foreign currency forward contracts are designated as cash flow hedges and, to the extent effective, any unrealized gains or losses are reported in other comprehensive income (OCI) and reclassified to operations in the same periods during which the underlying hedged transactions affect earnings. If a hedging relationship is terminated with respect to a foreign currency forward contract, accumulated gains or losses associated with the contract remain in OCI until the hedged forecasted transaction occurs and are reclassified to operations in the same periods during which the underlying hedged transactions affect earnings. Any ineffectiveness on these foreign currency forward contracts is reported on the Consolidated Statements of Income in other income (expense), net. The forward point components of these foreign currency forward contracts are not designated as cash flow hedges and all fair value adjustments of forward point amounts are recorded to other income (expense), net. Foreign currency forward contracts entered into to hedge forecasted revenue and expenses were as follows at December 31, 2015 and December 31, 2014:

	Notional Amount
Foreign Currency:	2015		2014
Australian Dollar	$	45.1	$	18.8
British Pound	289.3		304.8
Canadian Dollar	135.9		43.7
Euro	2,934.3		3,375.7
Japanese Yen	510.4		541.1
Total	$	3,915.0	$	4,284.1

We consider the impact of our own and the counterparties’ credit risk on the fair value of the contracts as well as the ability of each party to execute its obligations under the contract on an ongoing basis. As of December 31, 2015, credit risk did not materially change the fair value of our foreign currency forward contracts.

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We also manage a portfolio of foreign currency contracts to reduce exposures to foreign currency fluctuations of certain recognized assets and liabilities denominated in foreign currencies and, from time to time, we enter into foreign currency contracts to manage exposure related to translation of foreign earnings. These foreign currency forward contracts have not been designated as hedges and, accordingly, any changes in their fair value are recognized on the Consolidated Statements of Income in other income (expense), net in the current period. The aggregate notional amount of the foreign currency forward non-designated hedging contracts outstanding at December 31, 2015 and December 31, 2014 were $920.0 million and $835.5 million, respectively.

Foreign Currency Option Contracts: From time to time, we may hedge a portion of our future foreign currency exposure by utilizing a strategy that involves both a purchased local currency put option and a written local currency call option that are accounted for as hedges of future sales denominated in that local currency. Specifically, we sell (or write) a local currency call option and purchase a local currency put option with the same expiration dates and local currency notional amounts but with different strike prices. This combination of transactions is generally referred to as a “collar.” The expiration dates and notional amounts correspond to the amount and timing of forecasted foreign currency sales. If the U.S. dollar weakens relative to the currency of the hedged anticipated sales, the purchased put option value reduces to zero and we benefit from the increase in the U.S. dollar equivalent value of our anticipated foreign currency cash flows; however, this benefit would be capped at the strike level of the written call, which forms the upper end of the collar. The premium collected from the sale of the call option is equal to the premium paid for the purchased put option, resulting in a net zero cost for each collar. Outstanding foreign currency option contracts entered into to hedge forecasted revenue were as follows at December 31, 2015 and 2014:

	Notional Amount1
	2015		2014
Foreign currency option contracts designated as hedging activity:
Purchased Put	$	641.5	$	152.6
Written Call	$	690.0	$	160.9

¹ U.S. dollar notional amounts are calculated as the hedged local currency amount multiplied by the strike value of the foreign currency option. The local currency notional amounts of our purchased put and written call that are designated as hedging activities are equal to each other.

Interest Rate Risk Management

In anticipation of issuing fixed-rate debt, we may use forward starting interest rate swaps (forward starting swaps) or treasury rate lock agreements (treasury rate locks) that are designated as cash flow hedges to hedge against changes in interest rates that could impact expected future issuances of debt. To the extent these hedges of cash flows related to anticipated debt are effective, any realized or unrealized gains or losses on the treasury rate locks or forward starting swaps are reported in OCI and are recognized in income over the life of the anticipated fixed-rate notes.

Forward Starting Interest Rate Swaps and Treasury Rate Locks: During 2014, we entered into forward starting swaps that were designated as cash flow hedges to hedge against changes in interest rates that could impact an anticipated issuance of debt in 2015. During 2015, we entered into additional forward starting swaps and treasury rate locks. Forward starting swaps and treasury rate locks with a combined aggregate notional value of $2.900 billion were settled upon the issuance of debt in August 2015, when the net fair value of the forward starting swaps and treasury rate locks in accumulated other comprehensive income was in a loss position of $21.6 million. The net loss will be recognized as interest expense over the life of the associated senior notes. During 2015 and in January 2016, we entered into forward starting swaps with effective dates in September 2017 and maturing in ten years.

Interest Rate Swap Contracts: From time to time we hedge the fair value of certain debt obligations through the use of interest rate swap contracts. The interest rate swap contracts are designated hedges of the fair value changes in the notes attributable to changes in interest rates. Since the specific terms and notional amount of the swap are intended to match those of the debt being hedged, it is assumed to be a highly effective hedge and all changes in fair value of the swap are recorded on the Consolidated Balance Sheets with no net impact recorded in income. Any net interest payments made or received on interest rate swap contracts are recognized as interest expense. If a hedging relationship is terminated for an interest rate swap contract, accumulated gains or losses associated with the contract are measured and recorded as a reduction or increase of current and future interest expense associated with the previously hedged debt obligations.

We have entered into swap contracts that were designated as hedges of certain of our fixed rate notes and also terminated the hedging relationship by settling certain of those swap contracts during 2013, 2014 and 2015. The settlement of swap contracts due to terminations and maturities resulted in the receipt of net proceeds of $10.8 million and $25.5 million in 2015 and 2014, respectively, which are accounted for as a reduction of current and future interest expense associated with these notes. See Note 11 for additional details related to reductions of current and future interest expense.

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The following table summarizes the notional amounts of our outstanding interest rate swap contracts at December 31, 2015 and December 31, 2014: 

	Notional Amount
	2015		2014
Interest rate swap contracts entered into as fair value hedges of the following fixed-rate senior notes:
2.450% senior notes due 2015	$	—	$	300.0
1.900% senior notes due 2017	300.0		300.0
2.300% senior notes due 2018	200.0		200.0
2.250% senior notes due 2019	500.0		500.0
3.950% senior notes due 2020	500.0		500.0
3.250% senior notes due 2022	1,000.0		750.0
4.000% senior notes due 2023	700.0		150.0
3.625% senior notes due 2024	100.0		—
3.875% senior notes due 2025	250.0		—
Total	$	3,550.0	$	2,700.0

The following table summarizes the fair value and presentation in the Consolidated Balance Sheets for derivative instruments as of December 31, 2015 and 2014:

		December 31, 2015
		Fair Value
Instrument	Balance Sheet Location	Asset Derivatives		Liability Derivatives
Derivatives designated as hedging instruments:
Foreign exchange contracts1	Other current assets	$	356.2	$	18.0
	Other non-current assets	287.8		28.0
Interest rate swap agreements	Other current assets	30.7		—
	Other non-current assets	26.1		4.7
	Other non-current liabilities	0.2		0.9
Derivatives not designated as hedging instruments:
Foreign exchange contracts1	Other current assets	46.0		5.9
	Other current liabilities	2.9		7.4
Interest rate swap agreements	Other current assets	2.4		2.3
	Other non-current assets	2.4		1.4
Total		$	754.7	$	68.6

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

		December 31, 2014
		Fair Value
Instrument	Balance Sheet Location	Asset Derivatives		Liability Derivatives
Derivatives designated as hedging instruments:
Foreign exchange contracts1	Other current assets	$	264.9	$	44.9
	Other current liabilities	0.1		1.7
	Other non-current assets	322.3		17.5
Interest rate swap agreements	Other current assets	17.9		—
	Other non-current assets	4.8		0.3
	Other non-current liabilities	—		3.8
Derivatives not designated as hedging instruments:
Foreign exchange contracts1	Other current assets	39.7		6.0
	Other current liabilities	0.1		1.1
Interest rate swap agreements	Other current assets	0.1		—
	Other non-current assets	1.3		—
Total		$	651.2	$	75.3

¹Derivative instruments in this category are subject to master netting arrangements and are presented on a net basis in the Consolidated Balance Sheets in accordance with ASC 210-20.

The following table summarizes the effect of derivative instruments designated as cash-flow hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	2015
	(Effective Portion)							(Ineffective Portion and Amount Excluded From Effectiveness Testing)
Instrument	Amount of Gain/(Loss) Recognized in OCI on Derivative1			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative
Foreign exchange contracts	$	429.4		Net product sales	$	354.4		Other income, net	$	20.0		2
Treasury rate lock agreements	$	(27.9	)	Interest expense	$	(4.2	)	Other income, net	$	(0.2	)	3
Forward starting interest rate swaps	$	9.0		Interest expense	$	(1.5	)	Other income, net	$	0.3		3

¹  Net gains of $364.8 million are expected to be reclassified from Accumulated OCI into income in the next 12 months.

²  The amount of net gains recognized in income represents $23.0 million of gains related to amounts excluded from the assessment of hedge effectiveness (fair value adjustments of forward point amounts) and $3.0 million in losses related to the ineffective portion of the hedging relationships.

³  The amount of net (loss) gain recognized in income relates to the ineffective portion of the hedging relationships.

	2014
	(Effective Portion)							(Ineffective Portion and Amount Excluded From Effectiveness Testing)
Instrument	Amount of Gain/(Loss) Recognized in OCI on Derivative1			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative
Foreign exchange contracts	$	600.4		Net product sales	$	27.5		Other income, net	$	(12.2	)	1
Treasury rate lock agreements	$	—		Interest expense	$	(3.5	)
Forward starting interest rate swaps	$	(32.3	)	Interest expense	$	(0.9	)	Other income, net	(3.6		)	2

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¹  The amount of net gain recognized in income represents $18.0 million in losses related to amounts excluded from the assessment of hedge effectiveness (fair value adjustments of forward point amounts) and $5.8 million of gains related to the ineffective portion of the hedging relationships.

²  The amount of net loss recognized in income relates to the ineffective portion of the hedging relationships.

The following table summarizes the effect of derivative instruments designated as fair value hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain (Loss) Recognized in Income on Derivative
Instrument		2015		2014
Interest rate swaps	Interest expense	$	60.3	$	43.0

The following table summarizes the effect of derivative instruments not designated as hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain (Loss) Recognized in Income on Derivative
Instrument		2015			2014
Foreign exchange contracts	Other income, net	$	81.2		$	79.3
Put options sold	Other income, net	$	(9.9	)	$	11.6

The impact of gains and losses on foreign exchange contracts not designated as hedging instruments related to changes in the fair value of assets and liabilities denominated in foreign currencies are generally offset by net foreign exchange gains and losses, which are also included on the Consolidated Statements of Income in other income (expense), net for all periods presented. When we enter into foreign exchange contracts not designated as hedging instruments to mitigate the impact of exchange rate volatility in the translation of foreign earnings, gains and losses will generally be offset by fluctuations in the U.S. Dollar translated amounts of each Income Statement account in current and/or future periods. 

6.     Cash, Cash Equivalents and Marketable Securities Available-for-Sale

Money market funds of $1.413 billion and $2.251 billion at December 31, 2015 and 2014, respectively, were recorded at cost, which approximates fair value and are included in cash and cash equivalents.

The amortized cost, gross unrealized holding gains, gross unrealized holding losses and estimated fair value of available-for-sale securities by major security type and class of security at December 31, 2015 and 2014 were as follows:

December 31, 2015	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
U.S. Treasury securities	$	153.0	$	—	$	(0.4	)	$	152.6
U.S. government-sponsored agency MBS	29.8		0.1		(0.4		)	29.5
Corporate debt – global	219.7		—		(1.6		)	218.1
Asset backed securities	35.6		—		(0.1		)	35.5
Marketable equity securities	811.5		468.1		(43.7		)	1,235.9
Total available-for-sale marketable securities	$	1,249.6	$	468.2	$	(46.2	)	$	1,671.6

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December 31, 2014	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
U.S. Treasury securities	$	1,044.7	$	0.3	$	(0.8	)	$	1,044.2
U.S. government-sponsored agency securities	145.1		0.1		(0.1		)	145.1
U.S. government-sponsored agency MBS	531.1		1.0		(2.7		)	529.4
Non-U.S. government, agency and supranational securities	32.4		—		(0.1		)	32.3
Corporate debt – global	446.3		0.6		(1.2		)	445.7
Asset backed securities	177.3		—		(0.2		)	177.1
Marketable equity securities	335.2		716.3		(0.2		)	1,051.3
Total available-for-sale marketable securities	$	2,712.1	$	718.3	$	(5.3	)	$	3,425.1

U.S. government-sponsored agency securities include general unsecured obligations either issued directly by or guaranteed by U.S. Government Sponsored Enterprises. U.S. government-sponsored agency MBS include mortgage-backed securities issued by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation and the Government National Mortgage Association. Non-U.S. government, agency and supranational securities consist of direct obligations of highly rated governments of nations other than the United States and obligations of sponsored agencies and other entities that are guaranteed or supported by highly rated governments of nations other than the United States. Corporate debt-global includes obligations issued by investment-grade corporations, including some issues that have been guaranteed by governments and government agencies. Asset backed securities consist of triple-A rated securities with cash flows collateralized by credit card receivables and auto loans. Marketable equity securities consist of investments in publicly traded equity securities.  The decrease in net unrealized gains in marketable equity securities in 2015 compared to 2014 primarily reflects the decrease in market value for certain equity investments subsequent to their respective initial public offerings. Net unrealized losses in marketable debt securities primarily reflect the impact of increased interest rates at December 31, 2015.

The fair value of all available-for-sale securities, which have been in an unrealized loss position for less than and longer than 12 months at December 31, 2015, was as follows:

	Less than 12 months					12 months or longer					Total
December 31, 2015	Estimated Fair Value		Gross Unrealized Loss			Estimated Fair Value		Gross Unrealized Loss			Estimated Fair Value		Gross Unrealized Loss
U.S. Treasury securities	$	143.6	$	(0.4	)	$	—	$	—		$	143.6	$	(0.4	)
U.S. government-sponsored agency MBS	12.8		(0.3		)	6.8		(0.1		)	19.6		(0.4		)
Corporate debt – global	193.5		(1.6		)	—		—			193.5		(1.6		)
Asset backed securities	29.6		(0.1		)	5.9		—			35.5		(0.1		)
Marketable equity securities	494.4		(43.7		)	—		—			494.4		(43.7		)
Total	$	873.9	$	(46.1	)	$	12.7	$	(0.1	)	$	886.6	$	(46.2	)

The Company believes that the decline in fair value of securities held at December 31, 2015 below their cost is temporary and intends to retain its investment in these securities for a sufficient period of time to allow for recovery in the market value of these investments.

Duration periods of available-for-sale debt securities at December 31, 2015 were as follows:

	Amortized Cost		Fair Value
Duration of one year or less	$	58.4	$	58.3
Duration of one through three years	363.7		361.8
Duration of three through five years	15.9		15.6
Total	$	438.0	$	435.7

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7.     Inventory

A summary of inventories by major category at December 31, 2015 and 2014 follows:

	2015		2014
Raw materials	$	201.3	$	200.0
Work in process	120.0		101.5
Finished goods	122.1		91.6
Total	$	443.4	$	393.1

8.     Property, Plant and Equipment

Property, plant and equipment at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Land	$	75.4	$	37.9
Buildings	274.1		260.8
Building and operating equipment	33.1		32.0
Leasehold improvements	152.3		135.5
Machinery and equipment	246.6		213.5
Furniture and fixtures	53.2		48.8
Computer equipment and software	389.6		332.8
Construction in progress	221.3		104.8
Subtotal	1,445.6		1,166.1
Less accumulated depreciation and amortization	631.5		523.5
Total	$	814.1	$	642.6

The increase in the balance of construction in progress from December 31, 2014 to December 31, 2015 primarily relates to the expansion of our corporate headquarters in Summit, New Jersey.

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9.     Other Financial Information

Accrued expenses at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Compensation	$	297.8	$	285.2
Rebates, distributor chargebacks and distributor services	365.5		232.9
Clinical trial costs and grants	255.1		189.5
Interest	170.3		59.1
Royalties, license fees and collaboration agreements	75.9		26.7
Commercial related activities	38.7		56.2
Sales returns	18.8		10.2
Rent	18.1		14.0
Professional services	14.9		7.9
Other taxes	7.9		9.3
Other	113.7		100.1
Total	$	1,376.7	$	991.1

Other current liabilities at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Deferred tax liability	$	—	$	131.2
Contingent consideration – Quanticel acquisition	82.5		—
Contingent consideration – Nogra acquisition	24.9		24.7
Contingent consideration – Avila acquisition	2.0		9.8
Compensation	55.6		32.6
Sales, use and value added tax	61.1		56.8
Derivative contracts	4.5		2.6
Collaboration agreement upfront payable	40.3		14.0
Other	0.1		4.1
Total	$	271.0	$	275.8

Other non-current liabilities at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Contingent consideration – Quanticel acquisition	$	84.2	$	—
Contingent consideration – Nogra acquisition	1,214.5		1,110.8
Contingent consideration – Avila acquisition	94.5		114.2
Contingent consideration – Gloucester acquisition	18.9		19.5
Contingent Value Rights - Abraxis acquisition	51.9		136.3
Deferred compensation and long-term incentives	170.5		150.5
Deferred tax liability	377.7		555.6
Other	29.5		49.8
Total	$	2,041.7	$	2,136.7

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10.   Intangible Assets and Goodwill

Intangible Assets: Our finite lived intangible assets primarily consist of developed product rights and technology obtained from the Pharmion Corp. (Pharmion), Gloucester, Abraxis BioScience, Inc. (Abraxis), Avila and Quanticel acquisitions. Our indefinite lived intangible assets consist of acquired IPR&D product rights from the Receptos, Nogra and Gloucester acquisitions. The remaining weighted-average amortization period for finite-lived intangible assets not fully amortized is approximately 9.7 years.

Intangible assets outstanding as of December 31, 2015 and December 31, 2014 are summarized as follows:

December 31, 2015	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,448.3	)	$	1,957.6
Technology	565.7		(197.1		)	368.6
Licenses	66.7		(22.3		)	44.4
Other	44.0		(27.1		)	16.9
	4,082.3		(1,694.8		)	2,387.5
Non-amortized intangible assets:
Acquired IPR&D product rights	8,470.6		—			8,470.6
Total intangible assets	$	12,552.9	$	(1,694.8	)	$	10,858.1

December 31, 2014	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,234.1	)	$	2,171.8
Technology	333.7		(135.1		)	198.6
Licenses	67.0		(18.1		)	48.9
Other	42.5		(22.9		)	19.6
	3,849.1		(1,410.2		)	2,438.9
Non-amortized intangible assets:
Acquired IPR&D product rights	1,628.7		—			1,628.7
Total intangible assets	$	5,477.8	$	(1,410.2	)	$	4,067.6

The gross carrying value of intangible assets increased by $7.075 billion in 2015 compared to 2014 primarily due to the addition of $6.842 billion of IPR&D from the Receptos acquisition and $0.232 billion of a technology platform from the Quanticel acquisition.

Amortization expense was $284.7 million, $263.9 million and $270.1 million for the years ended December 31, 2015, 2014 and 2013, respectively. Amortization expense increased by a net $20.8 million in 2015 compared to 2014, the increase primarily related to the amortization of technology related to the acquisition of Quanticel and an acceleration of amortization expense related to certain Gloucester related intangible assets. Assuming no changes in the gross carrying amount of intangible assets, the future annual amortization expense related to intangible assets is expected to be approximately $373.1 million in 2016, $372.4 million in 2017, $299.1 million in 2018, $162.9 million in 2019, and $153.8 million in 2020.

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Goodwill: At December 31, 2015, our goodwill related to the 2015 acquisitions of Receptos and Quanticel, 2014 acquisition of Nogra, the 2012 acquisition of Avila, the 2010 acquisitions of Abraxis and Gloucester, the 2008 acquisition of Pharmion and the 2004 acquisition of Penn T Limited.

The change in carrying value of goodwill is summarized as follows:

Balance at December 31, 2014	$	2,191.2
Acquisition of Receptos	2,570.0
Acquisition of Quanticel	117.8
Balance at December 31, 2015	$	4,879.0

11.   Debt

Short-Term Borrowings and Current Portion of Long-Term Debt: The carrying value of short-term borrowings and current portion of long-term debt outstanding at December 31, 2015 and December 31, 2014 includes:

	2015		2014
Commercial paper	$	—	$	99.6
2.450% senior notes due 2015	—		506.3
Total	$	—	$	605.9

Long-Term Debt:   We have an aggregate $14.250 billion principal amount of senior notes outstanding at varying maturity dates and interest rates. The carrying values of the long-term portion of these senior notes at December 31, 2015 and 2014 are summarized below:

	2015		2014
1.900% senior notes due 2017	$	501.2	$	501.0
2.125% senior notes due 2018	999.9		—
2.300% senior notes due 2018	401.7		401.2
2.250% senior notes due 2019	505.1		502.5
2.875% senior notes due 2020	1,497.5		—
3.950% senior notes due 2020	507.1		502.8
3.250% senior notes due 2022	1,016.1		1,010.2
3.550% senior notes due 2022	997.4		—
4.000% senior notes due 2023	710.3		708.5
3.625% senior notes due 2024	1,001.7		996.8
3.875% senior notes due 2025	2,475.6		—
5.700% senior notes due 2040	249.6		249.5
5.250% senior notes due 2043	396.7		396.7
4.625% senior notes due 2044	996.6		996.5
5.000% senior notes due 2045	1,993.9		—
Total long-term debt	$	14,250.4	$	6,265.7

At December 31, 2015, the fair value of our outstanding Senior Notes was $14.299 billion and represented a Level 1 measurement within the fair value measurement hierarchy.

In August 2015, we issued an additional $8.000 billion principal amount of senior notes consisting of $1.000 billion aggregate principal amount of 2.125% Senior Notes due 2018 (the 2018 notes), $1.500 billion aggregate principal amount of 2.875% Senior Notes due 2020 (the 2020 notes), $1.000 billion aggregate principal amount of 3.550% Senior Notes due 2022 (the 2022 notes), $2.500 billion aggregate principal amount of 3.875% Senior Notes due 2025 (the 2025 notes) and $2.000 billion aggregate principal amount of 5.000% Senior Notes due 2045 (the 2045 notes and together with the 2018 notes, the 2020 notes, the 2022 notes, and the 2025 notes, referred to herein as the “2015 issued notes”).

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

The 2015 issued notes were issued at 99.994%, 99.819%, 99.729%, 99.034%, and 99.691% of par, respectively, and the discount is being amortized as additional interest expense over the period from issuance through maturity. Offering costs of approximately $50.0 million have been recorded as debt issuance costs on our Consolidated Balance Sheets and are being amortized as additional interest expense using the effective interest rate method over the period from issuance through maturity. Interest on the 2015 issued notes is payable semi-annually in arrears on February 15 and August 15 each year beginning February 15, 2016 and the principal on each 2015 issued note is due in full at their respective maturity dates. The 2015 issued notes may be redeemed at our option, in whole or in part; the 2018 notes, the 2020 notes, and the 2022 notes may be redeemed at any time, the 2025 notes and 2045 notes may be redeemed at three months and six months prior to the maturity dates, respectively.

Early redemption would be at a redemption price equaling accrued and unpaid interest plus the greater of 100% of the principal amount of the 2015 issued notes to be redeemed or the sum of the present values of the remaining scheduled payments of interest and principal discounted to the date of redemption on a semi-annual basis plus 20 basis points in the case of the 2018 notes, 20 basis points in the case of the 2020 notes, 25 basis points in the case of the 2022 notes, 30 basis points in the case of the 2025 notes, and 35 basis points in the case of the 2045 notes. If we experience a change of control accompanied by a downgrade of the debt to below investment grade, we will be required to offer to repurchase the 2015 issued notes at a purchase price equal to 101% of their principal amount plus accrued and unpaid interest. We are subject to covenants which limit our ability to pledge properties as security under borrowing arrangements and limit our ability to perform sale and leaseback transactions involving our property.

In 2015, the 2.45% senior notes with a principal amount of $500.0 million matured and were repaid. We also assumed $13.9 million of debt obligations as part of the acquisition of Quanticel in 2015 that were repaid in 2015.

From time to time, we have used treasury rate locks and forward starting interest rate swap contracts to hedge against changes in interest rates in anticipation of issuing fixed-rate notes. As of December 31, 2015, a balance of $68.1 million in losses remained in accumulated OCI related to settlements of these derivative instruments and will be recognized as interest expense over the life of the notes.

At December 31, 2015, we were party to pay-floating, receive-fixed interest rate swap contracts designated as fair value hedges

of fixed-rate notes as described in Note 5. Our swap contracts outstanding at December 31, 2015 effectively convert the hedged portion of our fixed-rate notes to floating rates. From time to time we terminate the hedging relationship on certain of our swap contracts by settling the contracts or by entering into offsetting contracts. Any net proceeds received or paid in these settlements are accounted for as a reduction or increase of current and future interest expense associated with the previously hedged notes. As of December 31, 2015, we had a balance of $33.1 million of unamortized gains recorded as a component of our debt as a result of past swap contract settlements, including $6.0 million related to the settlement of swap contracts during 2015.

Commercial Paper: The carrying value of Commercial Paper as of December 31, 2015 and 2014 was $0.0 million and $99.6 million, respectively, and approximated its fair value. As of December 31, 2015, we had available capacity to issue up to $1.750 billion of Commercial Paper and there were no borrowings under the Program.

Senior Unsecured Credit Facility: We maintain a senior unsecured revolving credit facility (Credit Facility) that provides revolving credit in the aggregate amount of $1.750 billion, which was increased from $1.500 billion in April 2015. Also in April 2015, the term of the Credit Facility was extended from April 18, 2018 to April 17, 2020. Subject to certain conditions, we have the right to increase the amount of the Credit Facility (but in no event more than one time per annum) up to a maximum aggregate amount of $2.000 billion.  Amounts may be borrowed in U.S. dollars for general corporate purposes. The Credit Facility currently serves as backup liquidity for our Commercial Paper borrowings. At December 31, 2015 and 2014, there was no outstanding borrowing against the Credit Facility.

The Credit Facility contains affirmative and negative covenants including certain customary financial covenants.  We were in compliance with all financial covenants as of December 31, 2015. 

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12.   Stockholders' Equity

Preferred Stock: Our Board of Directors is authorized to issue, at any time, without further stockholder approval, up to 5.0 million shares of preferred stock, and to determine the price, rights, privileges, and preferences of such shares.

Common Stock: At December 31, 2015, we were authorized to issue up to 1.150 billion shares of common stock of which shares of common stock issued totaled 940.1 million.

Treasury Stock: During the period of April 2009 through December 2015, our Board of Directors has approved repurchases of up to an aggregate $17.500 billion of our common stock, including the June 2015 authorization to repurchase an additional $4.000 billion of our common stock. We repurchased $3.251 billion, $2.928 billion, and $2.769 billion of treasury stock under the program in 2015, 2014 and 2013, respectively, excluding transaction fees. As of December 31, 2015 an aggregate 146.9 million common shares were repurchased under the program at an average price of $92.67 per common share and total cost of $13.610 billion.

Other: When employee awards of RSUs vest and are settled net in order to fulfill minimum statutory tax withholding requirements, the shares withheld are reflected as treasury stock.

A summary of changes in common stock issued and treasury stock is presented below (in millions of shares):

	Common Stock	Common Stock in Treasury
December 31, 2012	880.9	(78.7	)
Exercise of stock options and conversion of restricted stock units	25.0	(0.5	)
Issuance of common stock for employee benefit plans	0.6	—
Shares repurchased under share repurchase program	—	(22.3	)
December 31, 2013	906.5	(101.5	)
Exercise of stock options and conversion of restricted stock units	18.3	(1.3	)
Issuance of common stock for employee benefit plans	—	0.2
Shares repurchased under share repurchase program	—	(22.0	)
December 31, 2014	924.8	(124.6	)
Exercise of stock options and conversion of restricted stock units	15.3	(1.2	)
Issuance of common stock for employee benefit plans	—	0.4
Shares repurchased under share repurchase program	—	(28.1	)
December 31, 2015	940.1	(153.5	)

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

13.   Accumulated Other Comprehensive Income

The components of other comprehensive income (loss) consist of changes in pension liability, changes in net unrealized gains (losses) on marketable securities classified as available-for-sale, net unrealized gains (losses) related to cash flow hedges and changes in foreign currency translation adjustments.

The accumulated balances related to each component of other comprehensive income (loss), net of tax, are summarized as follows:

	Pension Liability			Net Unrealized Gains (Losses) From Marketable Securities			Net Unrealized Gains (Losses) From Hedges			Foreign Currency Translation Adjustment			Total Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2013	$	(6.9	)	$	137.3		$	(36.0	)	$	(0.4	)	$	94.0
Other comprehensive income (loss) before reclassifications	(8.6		)	320.1			580.4			(49.8		)	842.1
Amount reclassified from accumulated other comprehensive income	—			3.5			(24.8		)	—			(21.3		)
Net current-period other comprehensive income (loss)	(8.6		)	323.6			555.6			(49.8		)	820.8
Balance December 31, 2014	$	(15.5	)	$	460.9		$	519.6		$	(50.2	)	$	914.8
Other comprehensive income (loss) before reclassifications	1.6			(204.6		)	417.7			(26.1		)	188.6
Amount reclassified from accumulated other comprehensive income	—			15.2			(350.9		)	—			(335.7		)
Net current-period other comprehensive income (loss)	1.6			(189.4		)	66.8			(26.1		)	(147.1		)
Balance December 31, 2015	$	(13.9	)	$	271.5		$	586.4		$	(76.3	)	$	767.7

		Gains (Losses) Reclassified Out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Components	Affected Line Item in the Consolidated Statements of Income	Years Ended December 31,
		2015			2014			2013
Gains (losses) from cash-flow hedges:
Foreign exchange contracts	Net product sales	$	354.4		$	27.5		$	10.7
Treasury rate lock agreements	Interest (expense)	(4.2		)	(3.5		)	(3.4		)
Interest rate swap agreements	Interest (expense)	(1.5		)	(0.9		)	—
	Income tax benefit	2.2			1.7			6.9
Gains (losses) from available-for-sale marketable securities:
Realized income (loss) on sales of marketable securities	Interest and investment income, net	(23.4		)	(5.4		)	(7.3		)
	Income tax benefit	8.2			1.9			2.2
Total reclassification, net of tax		$	335.7		$	21.3		$	9.1

14.   Share-Based Compensation

We have a stockholder-approved stock incentive plan, the 2008 Stock Incentive Plan (Amended and Restated as of April 15, 2015) (Plan) that provides for the granting of options, RSUs, PSUs and other share-based awards to our employees and officers. The Management Compensation and Development Committee of the Board of Directors (Compensation Committee) may determine the type, amount and terms, including vesting, of any awards made under the Plan.

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On June 17, 2015, our stockholders approved an amendment of the Plan, which included the following key modifications: adoption of an aggregate share reserve of 247.8 million shares of Common Stock, which includes 19.8 million new shares of Common Stock; and an extension of the term of the Plan through April 15, 2025.

With respect to options granted under the Plan, the exercise price may not be less than the market closing price of the common stock on the date of grant. In general, options granted under the Plan vest over periods ranging from immediate vesting to four-year vesting and expire ten years from the date of grant, subject to earlier expiration in case of termination of employment unless the participant meets the retirement provision under which the option would have a maximum of three additional years to vest. The vesting period for options granted under the Plan is subject to certain acceleration provisions if a change in control, as defined in the Plan, occurs. Plan participants may elect to exercise options at any time during the option term. However, any shares so purchased which have not vested as of the date of exercise shall be subject to forfeiture, which will lapse in accordance with the established vesting time period.

During 2015, we increased our usage of PSUs and began issuing PSUs to certain executive officers that are payable in shares of our common stock at the end of a three-year performance measurement period. The number of shares to be issued at the end of the measurement period will vary, based on performance, from 0% to 200% of the target number of PSUs granted, depending on the achievement of specified performance and market targets for revenue (37.5% weighting), earnings per share (37.5% weighting), and relative total shareholder return (25% weighting). All shares delivered upon PSU vesting are restricted from trading for one year and one day from the vesting date.

The grant date fair value for the portion of the PSUs related to revenue and earnings per share was estimated using the fair market value of our common stock on the grant date. The grant date fair value for the portion of the PSUs related to relative total shareholder return was estimated using the Monte Carlo valuation model.

Shares of common stock available for future share-based grants under all plans were 38.3 million at December 31, 2015.

The following table summarizes the components of share-based compensation expense in the Consolidated Statements of Income for the years ended December 31, 2015, 2014 and 2013:

	2015		2014		2013
Cost of goods sold	$	31.7	$	26.2	$	18.5
Research and development	250.7		196.5		144.7
Selling, general and administrative	294.2		224.9		162.6
Total share-based compensation expense	576.6		447.6		325.8
Tax benefit related to share-based compensation expense	161.2		129.3		94.5
Reduction in income	$	415.4	$	318.3	$	231.3

Included in share-based compensation expense for the years ended December 31, 2015, 2014 and 2013 was compensation expense related to non-qualified stock options of $346.1 million, $276.3 million and $197.6 million, respectively. Net proceeds received from share-based compensation arrangements for the years ended December 31, 2015, 2014 and 2013 were $251.7 million, $297.2 million and $551.6 million, respectively, and the excess tax benefit recognized was $300.5 million, $250.6 million and $169.4 million, respectively. We do not recognize a deferred tax asset for excess tax benefits that have not been realized and have adopted the tax law method as our accounting policy regarding the ordering of tax benefits to determine whether an excess tax benefit has been realized.

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Stock Options: As of December 31, 2015, there was $640.9 million of total unrecognized compensation cost related to stock options granted under the plans. That cost will be recognized over an expected remaining weighted-average period of 2.0 years.

The weighted-average grant date fair value of the stock options granted during the years ended December 31, 2015, 2014 and 2013 was $38.83 per share, $27.92 per share and $20.22 per share, respectively. We estimated the fair value of options granted using a Black-Scholes option pricing model with the following assumptions:

	2015	2014	2013
Risk-free interest rate	1.17% - 1.72%	1.51% - 1.90%	0.68% - 1.70%
Expected volatility	31% - 38%	28% - 37%	27% - 35%
Weighted average expected volatility	34%	33%	31%
Expected term (years)	5.02 - 5.04	5.02 - 5.06	5.03 - 5.50
Expected dividend yield	0%	0%	0%

The risk-free interest rate is based on the U.S. Treasury zero-coupon curve. Expected volatility of stock option awards is estimated based on the implied volatility of our publicly traded options with settlement dates of six months. The use of implied volatility was based upon the availability of actively traded options on our common stock and the assessment that implied volatility is more representative of future stock price trends than historical volatility. The expected term of an employee share option is the period of time for which the option is expected to be outstanding. We made a determination of expected term by analyzing employees' historical exercise experience from its history of grants and exercises in our option database and management estimates. Forfeiture rates are estimated based on historical data.

The following table summarizes all stock option activity for the year ended December 31, 2015:

	Options		Weighted Average Exercise Price Per Option		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In Millions)
Outstanding at December 31, 2014	77.2		$	49.47	6.9	$	4,823.8
Changes during the Year:
Granted	11.8		118.65
Exercised	(11.5	)	34.39
Forfeited	(1.7	)	74.20
Expired	(0.1	)	39.48
Outstanding at December 31, 2015	75.7		$	61.99	6.6	$	4,411.8
Vested at December 31, 2015 or expected to vest in the future	75.1		$	61.64	6.6	$	4,400.1
Vested at December 31, 2015	41.2		$	41.12	5.3	$	3,238.5

The total fair value of shares vested during the years ended December 31, 2015, 2014 and 2013 was $266.5 million, $211.3 million and $159.3 million, respectively. The total intrinsic value of stock options exercised during the years ended December 31, 2015, 2014 and 2013 was $993.5 million, $946.6 million and $814.7 million, respectively. We primarily utilize newly issued shares to satisfy the exercise of stock options.

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Restricted Stock Units: We issue RSUs, under our equity program in order to provide an effective incentive award with a strong retention component. Equity awards may, at the option of employee participants, be divided between stock options and RSUs. The employee may choose between alternate Company defined mixes of stock options and RSUs, with the number of options to be granted reduced by four for every one RSU to be granted. Information regarding the Company's RSUs for the year ended December 31, 2015 is as follows:

Nonvested RSUs	Share Equivalent		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2014	9.4		$	59.02
Changes during the period:
Granted	2.5		112.98
Vested	(3.8	)	37.57
Forfeited	(0.4	)	71.95
Nonvested at December 31, 2015	7.7		$	86.28

As of December 31, 2015, there was $325.0 million of total unrecognized compensation cost related to non-vested RSU awards. That cost is expected to be recognized over a weighted-average period of 1.4 years. The Company primarily utilizes newly issued shares to satisfy the vesting of RSUs.

Performance-Based Restricted Stock Units: We grant performance-based restricted stock units that vest contingent upon the achievement of pre-determined performance-based milestones that are either related to product development or the achievement of specified performance and market targets, including revenue, earnings per share, and relative total shareholder return. The following table summarizes the Company's performance-based restricted stock unit activity for the year ended December 31, 2015 (shares in thousands):

Nonvested Performance-Based RSUs	Share Equivalent		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2014	133		$	69.57
Changes during the period:
Granted	211		112.14
Vested	—		—
Forfeited	(10	)	82.91
Non-vested at December 31, 2015	334		$	96.07

As of December 31, 2015, there was $17.9 million of total unrecognized compensation cost related to non-vested awards of performance-based RSUs that is expected to be recognized over a weighted-average period of 1.6 years.

15.   Employee Benefit Plans

We sponsor an employee savings and retirement plan, which qualifies under Section 401(k) of the Internal Revenue Code, as amended (the Code) for our U.S. employees. Our contributions to the U.S. savings plan are discretionary and have historically been made in the form of our common stock (See Note 12). Such contributions are based on specified percentages of employee contributions up to 6% of eligible compensation or a maximum permitted by law. Total expense for contributions to the U.S. savings plans were $35.1 million, $40.7 million and $32.6 million in 2015, 2014 and 2013, respectively.

We also sponsor defined contribution plans in certain foreign locations. Participation in these plans is subject to the local laws that are in effect for each country and may include statutorily imposed minimum contributions. We also maintain defined benefit plans in certain foreign locations for which the obligations and the net periodic pension costs were determined to be immaterial at December 31, 2015.

In 2000, our Board of Directors approved a deferred compensation plan. The plan was frozen effective as of December 31, 2004, and no additional contributions or deferrals can be made to that plan. Accrued benefits under the frozen plan will continue to be governed by the terms under the tax laws in effect prior to the enactment of American Jobs Creation Act of 2004, Section 409A (Section 409A).

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In February 2005, our Board of Directors adopted the Celgene Corporation 2005 Deferred Compensation Plan, effective as of January 1, 2005, and amended the plan in February 2008. This plan operates as our ongoing deferred compensation plan and is intended to comply with Section 409A. Eligible participants, which include certain top-level executives as specified by the plan, can elect to defer up to an amended 90% of the participant's base salary, 100% of cash bonuses and equity compensation allowed under Section 409A. Company contributions to the deferred compensation plan represent a match to certain participants' deferrals up to a specified percentage, which currently ranges from 10% to 20%, depending on the employee's position as specified in the plan, of the participant's base salary. We recorded expenses of $0.3 million, $0.3 million and $0.6 million related to the deferred compensation plans in 2015, 2014 and 2013, respectively. The Company's matches are fully vested upon contribution. All other Company contributions to the plan do not vest until the specified requirements are met. At December 31, 2015 and 2014, we had a deferred compensation liability included in other non-current liabilities in the Consolidated Balance Sheets of approximately $104.5 million and $91.0 million, respectively, which included the participant's elected deferral of salaries and bonuses, the Company's matching contribution and earnings on deferred amounts as of that date. The plan provides various alternatives for the measurement of earnings on the amounts participants defer under the plan. The measurement alternatives are based on returns of a variety of funds that offer plan participants the option to spread their risk across a diverse group of investments.

In 2003, we established a Long-Term Incentive Plan (LTIP) designed to provide key officers and executives with performance-based incentive opportunities contingent upon achievement of pre-established corporate performance objectives covering a three-year period. We currently have three separate three-year performance cycles running concurrently ending December 31, 2016, 2017 and 2018. Performance measures for each of the performance cycles are based on the following components: 37.5% on non-GAAP earnings per share (as defined in the LTIP); 37.5% on total non-GAAP revenue (as defined in the LTIP); and 25% on relative total shareholder return, which is a measurement of our stock price performance during the applicable three-year period compared with a group of other companies in the biopharmaceutical industry.

Threshold, target and maximum cash payout levels under the three current LTIP performance cycles are calculated as a percentage between 0% to 200% of each participant’s base salary at the time the LTIP was approved by the Compensation Committee. Such awards are payable in cash or common stock or a mixture of cash and common stock, which will be determined by the Compensation Committee at the time of award delivery. Share-based payout levels are calculated using the cash-based threshold, target and maximum levels, divided by the average closing price of Celgene stock for the 30 trading days prior to the commencement of each performance cycle. Therefore, final share-based award values are reflective of the stock price at the end of the measurement period. The Compensation Committee may determine that payments made in common stock are restricted from trading for a period of time. The estimated payout value for the concluded 2015 Plan is $17.4 million, which is included in accrued expenses at December 31, 2015, and the maximum potential cash-based payout, assuming maximum objectives are achieved for the 2016, 2017 and 2018 Plans are $25.2 million, $16.4 million and $16.3 million respectively. The reduction in the maximum potential cash-based payout for the 2017 Plan reflects a shift in the mix of compensation components for certain senior executives, including performance-based equity compensation in lieu of LTIP participation. We accrue the long-term incentive liability over each three-year cycle. Prior to the end of a three-year cycle, the accrual is based on an estimate of our level of achievement during the cycle. Upon a change in control, participants will be entitled to an immediate payment equal to their target award or, if higher, an award based on actual performance through the date of the change in control. For the years ended December 31, 2015, 2014 and 2013, we recognized expense related to the LTIP of $24.9 million, $42.3 million and $40.8 million, respectively.

16.   Income Taxes

Income before income taxes is as follows:

	2015		2014		2013
U.S.	$	524.8	$	565.0	$	36.8
Non-U.S.	1,498.7		1,762.4		1,628.6
Income before income taxes	$	2,023.5	$	2,327.4	$	1,665.4

For the years ended December 31, 2015, 2014 and 2013, U.S. income before income taxes reflects charges related to share-based compensation, up-front collaboration payments, asset impairments, acquisitions and interest expense which in the aggregate, decreased in the United States from 2013 to 2014. Many of these charges are not deductible for U.S. income tax purposes. These charges were lower outside the United States in those years.

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The provision (benefit) for taxes on income is as follows:

	2015			2014			2013
United States:
Taxes currently payable:
Federal	$	320.7		$	489.4		$	352.6
State and local	63.1			56.3			45.4
Deferred income taxes	(28.7		)	(273.8		)	(245.1		)
Total U.S. tax provision	355.1			271.9			152.9
International:
Taxes currently payable	71.1			54.1			64.1
Deferred income taxes	(4.7		)	1.5			(1.5		)
Total international tax provision	66.4			55.6			62.6
Total provision	$	421.5		$	327.5		$	215.5

Amounts are reflected in the preceding tables based on the location of the taxing authorities. We do not provide for U.S. federal or state income taxes on unremitted earnings of our international subsidiaries that are indefinitely invested outside the United States. As of December 31, 2015, we have not made a U.S. tax provision on $9.667 billion of unremitted earnings of our international subsidiaries. As these earnings are expected to be reinvested overseas indefinitely, it is not practicable to compute the estimated deferred tax liability on these earnings.

Deferred taxes arise because of different treatment between financial statement accounting and tax accounting, known as temporary differences. We record the tax effect on these temporary differences as deferred tax assets (generally items that can be used as a tax deduction or credit in future periods) or deferred tax liabilities (generally items for which we received a tax deduction but that have not yet been recorded in the Consolidated Statements of Income and the tax effects of acquisition related temporary differences). We periodically evaluate the likelihood of the realization of deferred tax assets, and reduce the carrying amount of these deferred tax assets by a valuation allowance to the extent we believe a portion will not be realized. We consider many factors when assessing the likelihood of future realization of deferred tax assets, including our recent cumulative earnings experience by taxing jurisdiction, expectations of future taxable income, the carryforward periods available to us for tax reporting purposes, tax planning strategies and other relevant factors. Significant judgment is required in making this assessment. At December 31, 2015 and 2014, it was more likely than not that we would realize our deferred tax assets, net of valuation allowances. The valuation allowances relate primarily to certain deferred tax assets acquired in the Receptos acquisition and certain fair value adjustments which are expected to result in non-deductible losses.

Approximately $900.0 million of our foreign earnings may not be required for use in offshore operations and may be available for use in the United States. These earnings are not treated as permanently reinvested, and our deferred tax liabilities include $316.5 million for the estimated U.S. federal and state income taxes that may be incurred should these earnings be repatriated. In drawing this conclusion, we considered our future sources of funds as well as our global operating and strategic liquidity needs, including common share repurchase activities and expansion of our commercial, research, manufacturing and administrative infrastructure worldwide.

At December 31, 2015 and 2014 the tax effects of temporary differences that give rise to deferred tax assets and liabilities were as follows:

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	2015						2014
	Assets			Liabilities			Assets			Liabilities
NOL carryforwards	$	56.2		$	—		$	4.5		$	—
Deferred revenue	1.8			—			1.7			—
Capitalized research expenses	3.8			—			4.8			—
Tax credit carryforwards	10.7			—			5.0			—
Non-qualified stock options	340.9			—			250.5			—
Plant and equipment, primarily differences in depreciation	2.0			—			—			(7.4		)
Inventory	11.3			—			14.5			—
Other assets	43.0			(3.7		)	41.5			(4.0		)
Intangible assets	661.3			(1,135.4		)	654.7			(1,183.2		)
Accrued and other expenses	233.2			—			191.6			—
Unremitted earnings	—			(316.5		)	—			(316.5		)
Unrealized (gains) losses on securities	—			(129.9		)	—			(236.5		)
Subtotal	1,364.2			(1,585.5		)	1,168.8			(1,747.6		)
Valuation allowance	(90.8		)	—			(39.7		)	—
Total deferred taxes	$	1,273.4		$	(1,585.5	)	$	1,129.1		$	(1,747.6	)
Net deferred tax asset (liability)				$	(312.1	)				$	(618.5	)

At December 31, 2015 and 2014, deferred tax assets and liabilities were classified on our Consolidated Balance Sheets as follows:

	2015			2014
Current assets(1)	$	—		$	11.7
Other assets (non-current)	65.6			56.6
Current liabilities(1)	—			(131.2		)
Other non-current liabilities	(377.7		)	(555.6		)
Net deferred tax asset (liability)	$	(312.1	)	$	(618.5	)

⁽¹⁾ Balances reflect our early adoption of ASU 2015-17 on a prospective basis, which requires companies to classify all deferred tax assets and liabilities and associated valuation allowances as non-current on the balance sheet instead of separating deferred taxes and associated valuation allowances into current and non-current amounts. Prior periods were not retrospectively adjusted.

Reconciliation of the U.S. statutory income tax rate to the Company's effective tax rate is as follows:

Percentages	2015		2014		2013
U.S. statutory rate	35.0	%	35.0	%	35.0	%
Foreign tax rate differences	(21.0	)%	(22.3	)%	(28.8	)%
Unremitted earnings	—	%	—	%	—	%
State taxes, net of federal benefit	1.2	%	1.0	%	0.6	%
Change in valuation allowance	2.0	%	0.2	%	1.2	%
Acquisition related differences	4.5	%	(0.3	)%	3.7	%
Changes in uncertain tax positions	(0.5	)%	(0.4	)%	0.8	%
Other	(0.4	)%	0.9	%	0.4	%
Effective income tax rate	20.8	%	14.1	%	12.9	%

In our reconciliation of the U.S. statutory income tax rate to our effective tax rate, we disclose changes in uncertain tax positions which include the effect of settlements, expirations of statutes of limitations, and other changes in prior year tax positions.

We have operations in many foreign tax jurisdictions, which impose income taxes at different rates than the United States. The impact of these rate differences is included in the foreign tax rate differences that we disclose in our reconciliation of the U.S.

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statutory income tax rate to our effective tax rate. The benefit related to foreign tax rate differences primarily results from our commercial operations in Switzerland, which include significant research and development and manufacturing for worldwide markets. We operated under an income tax agreement in Switzerland through 2015 that provided an exemption from most Swiss income taxes on our operations in Switzerland. In 2013, we entered into a new agreement with the Swiss tax authorities which reflects the planned expansion of our Swiss operations and coupled with a 2014 reorganization of our Swiss operations will result in similar tax benefits through the end of 2024. The difference between the maximum statutory Swiss income tax rate (approximately 17.0% in 2015, 18.4% in 2014 and 19.7% in 2013) and our Swiss income tax rate under the tax agreement resulted in a reduction in the 2015, 2014 and 2013 effective tax rates of 25.7, 18.0 and 25.1 percentage points, respectively. The increase in benefits reflected in the foreign tax rate differences from 2014 to 2015 resulted primarily from an increase in the proportion of consolidated income before taxes from Swiss operations.

At December 31, 2015, we had federal NOL carryforwards of approximately $114.2 million and combined state NOL carryforwards of approximately $883.5 million that will expire in the years 2016 through 2035. We also have research and experimentation credit carryforwards of approximately $16.8 million that will expire in the years 2018 through 2034. Excess tax benefits related to stock option deductions incurred after December 31, 2005 are required to be recognized in the period in which the tax deduction is realized through a reduction of income taxes payable. As a result, we have not recorded deferred tax assets for certain stock option deductions included in our state NOL carryforwards and research and experimentation credit carryforwards. At December 31, 2015, deferred tax assets have not been recorded on state NOL carryforwards of approximately $476.4 million and for research and experimentation credits of approximately $4.0 million. These stock option tax benefits are expected to be recorded as an increase in additional paid-in capital when realized.

We realized share-based compensation deduction benefits in 2015, 2014 and 2013 for income tax purposes and have increased additional paid-in capital in the amount of approximately $302.1 million, $252.6 million and $170.0 million, respectively. We have recorded deferred income taxes related to net unrealized gains on securities as a component of accumulated other comprehensive income resulting in a deferred income tax liability at December 31, 2015 and 2014 of $129.9 million and $236.5 million, respectively.

On August 27, 2015, we acquired all of the outstanding common stock of Receptos. The acquisition was accounted for using the acquisition method of accounting, and we recorded a deferred tax liability of $2.519 billion related to the acquisition. Upon integration of the acquired assets into our offshore research, manufacturing, and commercial operations, the deferred tax liability was reclassified to a non-current tax liability. This liability represents an estimate of income tax that may be incurred in the future. This income tax liability is contingent upon successful development of the acquired IPR&D into a commercially viable product and would be incurred over the product's economic useful life.

Our tax returns are under routine examination in many taxing jurisdictions. The scope of these examinations includes, but is not limited to, the review of our taxable presence in a jurisdiction, our deduction of certain items, our claims for research and development credits, our compliance with transfer pricing rules and regulations and the inclusion or exclusion of amounts from our tax returns as filed. Our U.S. federal income tax returns have now been audited by the IRS through the year ended December 31, 2008. Tax returns for the years ended December 31, 2009, 2010, and 2011 are currently under examination by the IRS. We are also subject to audits by various state and foreign taxing authorities, including, but not limited to, most U.S. states and major European and Asian countries where we have operations.

We regularly reevaluate our tax positions and the associated interest and penalties, if applicable, resulting from audits of federal, state and foreign income tax filings, as well as changes in tax law (including regulations, administrative pronouncements, judicial precedents, etc.) that would reduce the technical merits of the position to below more likely than not. We believe that our accruals for tax liabilities are adequate for all open years. Many factors are considered in making these evaluations, including past history, recent interpretations of tax law and the specifics of each matter. Because tax regulations are subject to interpretation and tax litigation is inherently uncertain, these evaluations can involve a series of complex judgments about future events and can rely heavily on estimates and assumptions. We apply a variety of methodologies in making these estimates and assumptions, which include studies performed by independent economists, advice from industry and subject experts, evaluation of public actions taken by the IRS and other taxing authorities, as well as our industry experience. These evaluations are based on estimates and assumptions that have been deemed reasonable by management. However, if management's estimates are not representative of actual outcomes, our results of operations could be materially impacted.

Unrecognized tax benefits, generally represented by liabilities on the consolidated balance sheet and all subject to tax examinations, arise when the estimated benefit recorded in the financial statements differs from the amounts taken or expected to be taken in a tax return because of the uncertainties described above. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

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	2015			2014
Balance at beginning of year	$	251.8		$	219.2
Increases related to prior year tax positions	—			2.8
Decreases related to prior year tax positions	—			—
Increases related to current year tax positions	84.8			44.4
Settlements	—			(10.0		)
Lapse of statute	(10.8		)	(4.6		)
Balance at end of year	$	325.8		$	251.8

These unrecognized tax benefits relate primarily to issues common among multinational corporations. If recognized, unrecognized tax benefits of approximately $300.8 million would have a net impact on the effective tax rate. We account for interest and penalties related to uncertain tax positions as part of our provision for income taxes. Accrued interest at December 31, 2015 and 2014 is approximately $32.6 million and $28.1 million, respectively.

We have recorded changes in the liability for unrecognized tax benefits for current and prior year tax positions related to ongoing income tax audits in various taxing jurisdictions. The liability for unrecognized tax benefits is expected to increase in the next twelve months relating to operations occurring in that period. Any settlements of examinations with taxing authorities or statute of limitations expirations would likely result in a decrease in our liability for unrecognized tax benefits and a corresponding increase in taxes paid or payable and/or a decrease in income tax expense. It is reasonably possible that the amount of the liability for unrecognized tax benefits could change by a significant amount during the next twelve-month period as a result of settlements or statute of limitations expirations. Finalizing examinations with the relevant taxing authorities can include formal administrative and legal proceedings and, as a result, it is difficult to estimate the timing and range of possible change related to the Company’s unrecognized tax benefits. An estimate of the range of the possible change cannot be made until issues are further developed or examinations close. Our estimates of tax benefits and potential tax benefits may not be representative of actual outcomes, and variation from such estimates could materially affect our financial statements in the period of settlement or when the statutes of limitations expire.

17.   Collaboration Agreements

We enter into collaborative arrangements for the research and development, license, manufacture and/or commercialization of products and/or product candidates. In addition, we also acquire products, product candidates and research and development technology rights and establish research and development collaborations with third parties to enhance our strategic position within our industry by strengthening and diversifying our research and development capabilities, product pipeline and marketed product base. These arrangements may include non-refundable, upfront payments, payments for options to acquire rights to products and product candidates and other rights, as well as potential development, regulatory and commercial performance milestone payments, cost sharing arrangements, royalty payments, profit sharing and equity investments. These arrangements could include obligations for us to make equity investments in the event of an initial public offering of equity by our partners. The activities under these collaboration agreements are performed with no guarantee of either technological or commercial success. Although we do not consider any individual alliance to be material, certain of the more notable alliances are described below. Summarized financial information related to our alliances is presented in tabular format after the description of alliances:

Acceleron Pharma (Acceleron): We have worldwide strategic collaboration agreements with Acceleron for the joint development and commercialization of sotatercept (ACE-011) and luspatercept (ACE-536). Sotatercept is currently in phase II studies for treatment of renal anemia, beta-thalassemia and MDS, and luspatercept is currently in phase II studies for beta-thalassemia and MDS.

On January 1, 2013 we became responsible for the payment of all development costs related to sotatercept and luspatercept and have recognized development expenses as research and development expense as they were incurred.

With respect to the sotatercept program, Acceleron is eligible to receive up to $367.0 million in development, regulatory approval and sales-based milestones and up to an additional $348.0 million for each of three specific discovery stage programs. We also agreed to co-promote the developed products in North America. Acceleron will receive tiered royalties on worldwide net sales upon the commercialization of a development compound.

With respect to the luspatercept program, we have an exclusive, worldwide, royalty-bearing license to luspatercept and future Acceleron products for the treatment of anemia. We also agreed to co-promote the products in the United States, Canada and Mexico. Acceleron is eligible to receive development, regulatory approval and sales-based milestones of up to $217.5 million for

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luspatercept and up to an additional $170.8 million for the first discovery stage program, $148.8 million for the second discovery stage program and $125.4 million for each additional discovery stage program thereafter. Acceleron will receive tiered royalties on worldwide net sales upon the commercialization of a development compound.

The sotatercept agreement may be terminated by us, at our sole discretion, at any time or by either party, among other things, upon a material breach by the other party. The luspatercept agreement may be terminated by us, at our sole discretion, after completion of the initial phase II clinical trial or by either party, among other things, upon a material breach by the other party.

Agios Pharmaceuticals, Inc. (Agios):  During 2010, we entered into a discovery and development collaboration and license agreement with Agios that focuses on cancer metabolism targets and the discovery, development and commercialization of associated therapeutics. We have an exclusive option to license any potential products that result from the Agios cancer metabolism research platform through the end of phase I clinical trials.

With respect to each product that we choose to license, Agios could receive up to approximately $120.0 million upon achievement of certain milestones and other payments plus royalties on worldwide sales, and Agios may also participate in the development and commercialization of certain products in the United States. In December 2014, we elected to extend the collaboration and license agreement for an additional year for a payment of $20.0 million. Our option to license products will terminate on April 14, 2016.

In June 2014, we exercised our option to license AG-221 from Agios on an exclusive worldwide basis, with Agios retaining the right to conduct a portion of commercialization activities for AG-221 in the United States. AG-221 is currently in a phase I study in patients that present an isocitrate dehydrogenase-2 (IDH2) mutation with advanced hematologic malignancies, including acute myeloid leukemia (AML).

In January 2015, we exercised our option, subject to applicable regulatory approvals which were subsequently achieved, to an exclusive license from Agios to AG-120 outside the United States, with Agios retaining the right to conduct development and commercialization within the United States. AG-120 is an orally available, selective inhibitor of the mutated isocitrate dehydrogenase-1 (IDH1) protein for the treatment of patients with cancers that harbor an IDH1 mutation. AG-120 is currently being evaluated in two phase I dose escalation trials, one in advanced hematological malignancies and the other in advanced solid tumors.

In April 2015, we and Agios entered into a new joint worldwide development and profit share collaboration for AG-881. AG-881 is a small molecule that has shown in preclinical studies to fully penetrate the blood brain barrier and inhibit IDH1 and IDH2 mutant cancer cells. Under the terms of the AG-881 collaboration, Agios received an initial payment of $10.0 million and is eligible to receive contingent payments of up to $70.0 million based on the attainment of specified regulatory goals. The upfront payment to Agios was accounted for as $9.0 million of upfront research and development collaboration expense and $1.0 million of prepaid manufacturing rights recorded on the balance sheet. We and Agios will jointly collaborate on the worldwide development program for AG-881, sharing development costs equally. The two companies will share profits equally, with Celgene recording commercial sales worldwide. Agios will lead commercialization in the U.S. with both companies sharing equally in field-based commercial activities, and we will lead commercialization ex-U.S. with Agios providing one third of field-based commercial activities in the major EU markets.

Epizyme Inc. (Epizyme): In July 2015 we entered into an amendment and restatement of the collaboration and license agreement dated April 2, 2012 with Epizyme (the “Amended Agreement”). Under the original agreement, we had an exclusive license, for all countries other than the United States, to small molecule HMT inhibitors targeting DOT1L, including pinometostat (EPZ-5676), and an option, on a target-by-target basis, to exclusively license, for all countries other than the United States, rights to small molecule HMT inhibitors targeting any other HMT targets. Under the Amended Agreement:

• We retain our exclusive license to small molecule HMT inhibitors targeting DOT1L outside of the United States, including pinometostat (EPZ-5676),

• We have narrowed our option rights to HMT inhibitors targeting three predefined targets (the “Option Targets”),

• The exclusive licenses to HMT inhibitors targeting two of the Option Targets that we may acquire have been expanded to include the United States, with the exclusive license to the third Option Target continuing to be for all countries other than the United States,

• Our option period has been extended for each of the Option Targets and is exercisable at the time of Epizyme's IND filing for an HMT inhibitor targeting the applicable Option Target,

• Epizyme may complete phase I clinical trials as to each Option Target following our exercise of our option at IND filing. If Epizyme chooses not to complete phase I clinical trials to an Optioned Target, future milestones and royalties on products developed for such Option Targets will be reduced.

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Under the terms of the Amended Agreement, we made a $10.0 million payment to Epizyme. In addition, Epizyme may earn up to $75.0 million in development milestone payments, up to $365.0 million in regulatory milestone payments and up to $170.0 million in sales milestone payments related to the Option Targets. For the DOT1L program, Epizyme remains eligible to earn $35.0 million in clinical development milestone payments and up to $100.0 million in regulatory milestone payments. Epizyme is also entitled to tiered royalties ranging from the mid-single digits to the mid-teens on annual net product sales in our territory, subject to reductions in specified circumstances.

The Amended Agreement extends the research and development collaboration for at least an additional three years until July 8, 2018, subject to our exercise of our options at IND filing. The Amended Agreement will expire on a product-by-product and country-by-country basis on the date of the expiration of the applicable royalty term with respect to each licensed product in each country and in its entirety upon the expiration of all applicable royalty terms for all licensed products in all countries. We have the right to terminate the Amended Agreement in its entirety or with respect to one or more Optioned Targets upon 120 days’ notice. Upon the expiration of the royalty term of a particular license product, we will have a fully paid-up, royalty-free license to use Epizyme intellectual property to manufacture, market, use and sell such licensed products in our territory.

Sutro Biopharma, Inc. (Sutro): In December 2012, we entered into a collaboration and license agreement with Sutro for the development of an antibody drug conjugate (ADC) and a bispecific antibody construct (BAC).  Sutro controls and conducts initial development activities.  We have the right to select one ADC among a number of different sequence-payload combinations and positional variants, and one BAC.  Sutro will provide adequate quantities of any selected ADC and selected BAC to allow us to conduct all necessary preclinical studies, including toxicology and pharmacokinetics studies.

Under the terms of the 2012 agreement, Sutro received payments totaling $35.0 million, which included an equity investment and other rights. In addition, the 2012 collaboration and license agreement includes certain development and regulatory milestones that could total up to $204.0 million for a selected ADC if approved in multiple indications, and up to $279.0 million for a selected BAC if approved in multiple indications, as well as tiered royalties based on annual net sales of licensed products.

In September 2014, we entered into a second collaboration and license agreement with Sutro to jointly develop up to six prioritized anti-cancer BACs and/or ADCs directed primarily to immune-oncology targets. Sutro will control and conduct initial development activities. We have the right to advance any BAC and/or ADC to investigational new drug (IND)-enabling studies or to designate it as a development candidate, and in either case, we would then have the sole right and responsibility for development activities, although Sutro would still have certain limited manufacturing and supply obligations.

Under the terms of the 2014 agreement, Sutro received payments totaling $95.0 million, which includes an equity investment that increases our ownership to approximately 15%, rights with respect to manufacturing and supply of BAC and ADC development candidates, and an option to acquire all of the outstanding equity of Sutro based on a pre-specified valuation procedure. The option is exercisable beginning September 2016 and expires upon the termination of the research term (as extended).

For a future one-time payment, we have the right to obtain access to Sutro’s proprietary protein expression platform to use in conjunction with our intellectual property. Additionally, we have the right to have Sutro evaluate the performance of certain monospecific ADCs directed against up to five non-natural amino acid targets, and reengineer, express, and provide antibodies which incorporate a single non-natural amino acid sequence in a number of preferred locations.

The research term of the collaboration and license agreement is three years, with an extension available for an additional one-and-a-half years for a payment of an additional fee. We have worldwide commercialization rights for development candidates in which at least one binding domain is directed to a certain undisclosed target, plus the first development candidate which does not include at least one binding domain directed to that certain undisclosed target but which achieves IND clearance in the U.S. For all other development candidates, Sutro has U.S. rights, while we have all ex-U.S. rights.

Under the terms of the 2014 agreement, Sutro is eligible to receive research and manufacturing milestones of up to $75.0 million, clinical development and regulatory approval milestones of up to $275.0 million for each compound selected under the collaboration if approved in multiple indications, as well as tiered royalties based on annual net sales of licensed products.

The collaboration and license agreement may be terminated by us at our discretion on a program-by-program basis upon 120 days prior written notice, or by either party for material breach, intellectual property challenge, or bankruptcy by the other party. With certain exceptions, the collaboration and license agreement expires in its entirety upon the expiration of all applicable royalty terms under the Agreement.

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bluebird bio, Inc. (bluebird):  In June 2015, we amended and restated the March 2013 collaboration agreement with bluebird. The amended and restated collaboration will focus on the discovery, development and commercialization of novel disease-altering gene therapy product candidates targeting B-cell maturation antigen (BCMA). BCMA is a cell surface protein that is expressed in normal plasma cells and in most multiple myeloma cells, but is absent from other normal tissues. The collaboration applies gene therapy technology to modify a patient’s own T-cells, known as chimeric antigen receptor (CAR) T-cells, to target and destroy cancer cells that express BCMA. We have an option to license any anti-BCMA products resulting from the collaboration after the completion of a phase I clinical study by bluebird.

Under the amended and restated collaboration agreement we made an additional $25.0 million payment for bluebird to develop the lead anti-BCMA product candidate (bb2121) through a phase I clinical study and to develop next-generation anti-BCMA product candidates. The payment was recorded as prepaid research and development on the balance sheet and is being recognized as expense as development work is performed. Upon exercising our option to license a product and achievement of certain milestones, we may be obligated to pay up to $230.0 million per licensed product in aggregate potential option fees and clinical and regulatory milestone payments. bluebird also has the option to participate in the development and commercialization of any licensed products resulting from the collaboration through a 50/50 co-development and profit share in the United States in exchange for a reduction of milestone payments. Royalties would also be paid to bluebird in regions where there is no profit share, including in the United States, if bluebird declines to exercise their co-development and profit sharing rights.

We have the ability to terminate the collaboration at our discretion upon 90 days written notice to bluebird.  If a product is optioned, the parties will enter into a pre-negotiated license agreement and potentially a co-development agreement should bluebird exercise its option to participate in the development and commercialization in the United States.  The license agreement, if not terminated sooner, would expire upon the expiration of all applicable royalty terms under the agreement with respect to the particular product, and the co-development agreement, if not terminated sooner, would expire when the product is no longer being developed or commercialized in the United States.  Upon the expiration of a particular license agreement, we will have a fully paid-up, royalty-free license to use bluebird intellectual property to manufacture, market, use and sell such licensed product.

FORMA Therapeutics Holdings, LLC (FORMA): In April 2013, we entered into a collaboration agreement with FORMA to discover, develop and commercialize drug candidates to regulate protein homeostasis targets. Protein homeostasis, which is important in oncology, neurodegenerative and other disorders, involves a tightly regulated network of pathways controlling the biogenesis, folding, transport and degradation of proteins.

The collaboration was launched with an upfront payment that enables us to evaluate selected targets and lead assets in protein homeostasis pathways during the pre-clinical phase. Based on such evaluation, we have the right to obtain exclusive licenses with respect to the development and commercialization of multiple drug candidates outside of the United States, in exchange for research and early development payments of up to approximately $200.0 million to FORMA. Under the terms of the collaboration agreement, FORMA is incentivized to advance the full complement of drug candidates through phase I, while Celgene is responsible for all further global clinical development for each licensed candidate. FORMA is eligible to receive up to an additional $315.0 million in potential payments based upon development, regulatory and sales objectives for the first ex-U.S. license. FORMA is also eligible to receive potential payments for successive licenses, which escalate for productivity, increasing up to a maximum of an additional $430.0 million per program. In addition, FORMA will receive royalties on ex-U.S. sales and additional payments if multiple drug candidates reach defined cumulative sales objectives. The collaboration agreement includes provisions for Celgene to obtain rights with respect to development and commercialization of drug candidates inside the United States in exchange for additional payments.

Under the collaboration, the parties perform initial research and development for a term of four years. If, during such research term, a drug candidate meets certain criteria, then the parties enter into a pre-negotiated license agreement and the collaboration continues until all license agreements have expired and all applicable royalty terms under the collaboration with respect to the particular products have expired. Each license agreement, if not terminated sooner, expires upon the expiration of all applicable royalty terms under such agreement. Upon the expiration of each license agreement, we will have an exclusive, fully-paid, royalty-free license to use the applicable FORMA intellectual property to manufacture, market, use and sell the product developed under such agreement outside of the United States. As of December 31, 2015, we have entered into three such license agreements with FORMA and paid the applicable upfront payments under such license agreements totaling $68.0 million.

On March 21, 2014, we entered into a second collaboration arrangement with FORMA, pursuant to which FORMA granted us an option, for an additional fee, to license the rights to select current and future FORMA drug candidates during a term of three and one half years. We agreed to pay an upfront payment of $225.0 million. In addition, with respect to each subsequently licensed drug candidate, we have the obligation to pay designated amounts when certain development, regulatory and sales milestone events occur, with such amounts being variable and contingent on various factors. With respect to each licensed drug candidate, we assume responsibility for all global development activities and costs after completion of phase I clinical trials. FORMA retains U.S. rights to all such licensed assets, including responsibility for manufacturing and commercialization.

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Under this collaboration arrangement, we also have an option to enter into up to two additional collaborations with successive terms of two years each for additional payments totaling approximately $375.0 million. If we exercise our option to enter into both of these additional collaborations, we will receive an exclusive option to acquire FORMA, including the U.S. rights to all licensed drug candidates, and worldwide rights to other wholly owned assets within FORMA at that time. In April, 2015, we entered into the first license agreement with FORMA under the second collaboration and made a $20.0 million upfront payment for the license.

Acetylon Pharmaceuticals, Inc. (Acetylon): In July 2013, we entered into a collaboration and option agreement with Acetylon. Under the agreement, the parties will support the development of Acetylon's portfolio of oral, selective HDAC inhibitors in oncology, hematology, immunology and neurologic disease indications. In addition, we have rights to receive certain research and development services from Acetylon and an exclusive right to acquire Acetylon at a later date at a purchase price based upon future independent company valuations.

The collaboration focuses on the continued clinical advancement of Acetylon's lead candidate, ACY-1215, an HDAC6 inhibitor being developed for hematological malignancies, ACY-738 for neurological diseases, an HDAC1/2 inhibitor and a yet unnamed project, spanning cancer and non-cancer disease indications. Under the agreement, we made an upfront payment to Acetylon, which included a fee for entering into the collaboration, fees for the exclusive right to acquire Acetylon and the rights to receive certain research and development services from Acetylon. During the term of the agreement, Acetylon will retain control of its drug development programs. If we exercise our right to acquire Acetylon, in addition to the purchase price based upon independent company valuations to be paid at the time of the acquisition, Acetylon shareholders will be eligible to receive potential future milestone payments for approvals, or additional indications, of drugs developed by Acetylon and for accomplishing defined sales targets. If all the milestones are achieved, the aggregate amount of the milestone payments would be $1.100 billion.

In August 2015, we entered into an amendment to the agreement with Acetylon to extend the expiration date of the agreement to May 2, 2016 and remove our right to further extend the expiration date. Further, we have the ability to terminate the agreement at our discretion upon written notice to Acetylon.

OncoMed Pharmaceuticals, Inc. (OncoMed): On December 2, 2013, we entered into a collaboration agreement to jointly develop and commercialize up to six anti-cancer stem cell (CSC) product candidates from OncoMed’s biologics pipeline, including demcizumab (OMP-21M18, Anti-DLL4). OncoMed will control and conduct initial clinical studies. We will have an option to license worldwide rights to up to six novel anti-CSC therapeutic candidates commencing upon the completion of enrollment of patients in a phase I trial (and with respect to demcizumab, a phase II trial) and ending 60 days after delivery by OncoMed of the applicable data package for each therapeutic candidate, subject to certain extensions.  We will also have research, development and commercialization rights to small molecule compounds in another cancer stem cell pathway, with OncoMed eligible to receive milestones and royalties on any resulting products.

Demcizumab is currently in multiple phase Ib, phase Ib/II, and phase II clinical studies in combination with standard-of-care therapeutics, including a trial in patients with first-line advanced pancreatic cancer. Subsequent to the exercise of our option rights, the parties will co-develop demcizumab and share global development costs on a one-third OncoMed and two-thirds Celgene split. Outside the United States, we would lead development and commercialization efforts, with OncoMed eligible to receive milestones and tiered royalties on sales outside the United States. For sales in the United States, OncoMed and Celgene would share profits equally.

In addition to demcizumab, the collaboration includes up to five phase Ia, preclinical- or discovery-stage biologics programs: OncoMed’s anti-DLL4/VEGF bispecific antibody and up to four additional biologics programs targeting either the RSPO-LGR CSC pathway or another CSC pathway. We have exclusive options on these programs during or after completion of certain phase I clinical trials to be conducted by OncoMed, which if exercised, contain U.S. profit sharing and co-commercialization terms, plus one-third OncoMed and two-thirds Celgene global development cost-sharing and royalties outside the profit-sharing territory.

The collaboration agreement also includes option exercise payments and payments for achievement of development, regulatory and commercial milestones, paid on a per-program basis. For the demcizumab program, these contingent payments could total up to approximately $790.0 million, and include a payment for achievement of predetermined safety criteria in phase II clinical trials, which was achieved on December 31, 2015 resulting in a $70.0 million payment in February 2016. For the anti-DLL4/VEGF bispecific antibody program, contingent payments could total up to $505.0 million. For the other four programs, each program is eligible for up to approximately $440.0 million of contingent payments. OncoMed could also receive more than $100.0 million in contingent payments for the small molecule program.

The collaboration agreement may be terminated by us on a program-by-program basis upon 120 days prior written notice before exercise of that program option, and after such program option exercise, by either party for material breach by the other party.

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With certain exceptions, the collaboration agreement expires upon the later of (a) the last-to-expire option term and (b) if one or more options are exercised, the termination or expiration of the last to expire agreement with respect to such exercised option.

NantBioScience, Inc. (NantBioScience): In January 2014, we entered into a collaboration agreement with NantBioScience, an entity controlled by Dr. Patrick Soon-Shiong in which Celgene contributed $75.0 million of cash, the rights to the future royalty stream based on net sales of certain products of Active Biomaterials, LLC, another entity controlled by Dr. Patrick Soon-Shiong, and licenses to two nab^® product candidates. In return, Celgene received a 14 percent preferred equity ownership in NantBioScience, an option to license a certain number of product candidates developed by NantBioScience, including the two nab^® product candidates that Celgene is licensing to NantBioScience, and the parent company of NantBioScience assumed, and agreed to pay and satisfy when due, our obligation to pay The Chan Soon-Shiong Institute for Advanced Health (CSS Institute) $50.0 million in contingent, matching contributions. The transaction became effective in March 2014. Unless Celgene terminates the collaboration earlier, in Celgene’s sole discretion upon 30 days written notice, the collaboration will continue until the earliest to occur of: (a) Celgene licensing four NantBioScience product candidates; (b) NantBioScience presenting data packages for ten product candidates; and (c) the date which is 10 years after the effective date. Regardless of any termination of the collaboration, the 14 percent preferred equity ownership in NantBioScience and the assumption of the $50.0 million in contingent, matching contributions by the parent company of NantBioScience remain in effect. We performed a valuation of the components of the transaction and allocated the consideration transferred as follows: $50.0 million for the collaboration agreement upfront expense; $25.0 million related to the settlement of contingent matching contributions, and; $90.0 million related to the equity ownership in NantBioScience.

AstraZeneca PLC (AstraZeneca): In April 2015, we entered into a strategic collaboration agreement with MedImmune Limited (MedImmune), a subsidiary of AstraZeneca, to develop and commercialize MEDI4736, a novel anti-PD-L1 monoclonal antibody, for hematologic malignancies. The agreement provides for a negotiation period to expand the agreement for other immuno-therapeutics. Under the terms of the agreement, we made an upfront payment of $450.0 million to MedImmune. We lead clinical development across all new clinical trials within the collaboration and are responsible for all costs associated with such trials until December 31, 2016, after which we will be responsible for 75 percent of those costs. We also will be responsible for the global commercialization of approved MEDI4736 indications in hematology, and will receive royalty rates starting at 70 percent of worldwide sales from all uses in hematology. Royalty rates will decrease gradually to 50 percent over a period of 4 years after the start of commercial sales. The agreement may be terminated at our discretion upon nine months’ prior written notice to MedImmune, and by either party upon material breach of the other party, subject to cure periods. The agreement, if not terminated sooner, expires upon the expiration of all applicable royalty terms under such agreement.

Lycera Corp. (Lycera): In June 2015, we entered into a collaboration and option agreement with Lycera. Under the agreement, the parties will support the development of Lycera’s portfolio of immune modulator assets, including (1) oral agonists that target RORy, a master control switch of immune system activation, for the potential treatment of a broad range of cancers, and (2) LYC-30937, an oral gut-directed ATPase modulator currently in phase I clinical studies. In addition, we have an exclusive right to acquire Lycera at a later date at a purchase price based upon future independent company valuations.

Lycera has developed orally bioavailable RORy agonists that have demonstrated single agent therapeutic activity in multiple animal models of cancer. Ex-vivo treatment with RORy agonist compounds has been shown to enhance the therapeutic benefit of adoptive T-cell therapy by improving both immune cell persistence and activation. Development of LYC-30937 is focused on the treatment of inflammatory bowel disease, with the goal of delivering significant disease improvement without global immune suppression. Under the collaboration, Lycera also will continue to advance its other programs, including a Rho-associated protein kinase 2 (ROCK2) inhibitor.

Under the terms of the agreement, we made an upfront payment of $82.5 million to Lycera. We received an exclusive option for an additional fee to license Lycera’s portfolio of ex-vivo RORy agonist compounds, an equity interest and an exclusive right to acquire Lycera. If we exercise the acquisition right, Lycera shareholders will be also eligible to receive future success-based milestone payments of up to $190.0 million. The upfront payment to Lycera was accounted for as $69.5 million of upfront collaboration payment included in research and development expense and $13.0 million as non-current assets consisting of $10.0 million for an equity investment and $3.0 million for an option to acquire the remaining shares outstanding.

The agreement has an initial term of 3 years and may be terminated earlier at our discretion upon 6 months’ prior written notice to Lycera and by either party upon material breach of the other party, subject to cure periods. In December 2015, we entered into a license agreement with Lycera, under which Lycera granted to us an exclusive license for Lycera’s portfolio of novel ex vivo RORy agonist compounds and we made a $17.5 million upfront payment which is included in research and development expense.

Juno Therapeutics, Inc. (Juno): In June 2015, we announced a collaboration and investment agreement with Juno for the development and commercialization of immunotherapies for cancer and autoimmune diseases. The collaboration and investment agreement became effective on July 31, 2015 after an early termination of the Hart-Scott-Rodino Antitrust waiting period. Under

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the terms of the agreement, we have the option to be the commercialization partner for Juno’s oncology and cell therapy auto-immune product candidates, including Juno’s CD19 and CD22 directed CAR T-cell product candidates. For Juno-originated programs co-developed under the collaboration, (a) Juno will be responsible for research and development in North America and will retain commercialization rights in those territories, (b) we will be responsible for development and commercialization in the rest of the world, and will pay Juno a royalty on sales in those territories, and (c) we have certain co-promotion options for global profit sharing arrangements under which the parties will share worldwide expenses and profits equally, except in China.

Juno will have the option to enter into co-development and co-commercialization arrangements on certain Celgene-originated development candidates that target T-cells. For any such Celgene-originated programs co-developed under the collaboration, (a) the parties will share global costs and profits, with 70 percent allocated to us and 30 percent allocated to Juno, and (b) we will lead global development and commercialization, subject to a Juno co-promote option in the US and certain EU territories.

Upon closing, we made a $1.000 billion payment to Juno and received 9.1 million shares of Juno common stock, amounting to approximately 9 percent of Juno's outstanding common stock. The value of our investment in Juno common stock of $424.9 million was recorded as an available-for sale marketable security based on the market price of the stock on the date of closing and the remaining portion of the $1.000 billion payment, which consists of both a $150.0 million upfront payment and a $425.1 million premium paid on our equity investment, was recorded to research and development expense.

The collaboration agreement has an initial term of ten years. If the parties enter into any pre-negotiated license or co-commercialization agreement during the initial term, the collaboration agreement will continue until all such license and co-commercialization agreements have expired. The collaboration agreement may be terminated at our discretion upon 120 days prior written notice to Juno and by either party upon material breach of the other party, subject to cure periods.

Nurix, Inc. (Nurix): In September 2015, we entered into a strategic collaboration agreement with Nurix for the discovery, development and commercialization of novel small molecule therapeutics in oncology and inflammation and immunology. Nurix will work exclusively with us in these therapeutic areas to advance new therapies that function through the ubiquitin proteasome system (UPS) to modulate protein homeostasis, a fundamental cellular process controlling protein levels.

Under the terms of the collaboration, we made an upfront payment to Nurix of $149.8 million, plus an equity investment of $17.0 million, which amounted to approximately 11 percent of Nurix outstanding equity, for an option to license future programs. The option term for each of these programs is the earlier of either (a) 45 days after the delivery of a phase I data package, or (b) four years, which period we may extend twice for the payment of additional fees. During the term, Nurix may focus on investigating E3 ubiquitin ligases and E2 conjugating enzymes to identify the most promising drug discovery programs for use in oncology or inflammation and immunology therapeutic applications. Nurix will control and is responsible for all drug discovery and development activities through the end of phase I clinical trials.

We may opt to license global development and commercialization rights to a program in exchange for an option fee, potential clinical, regulatory and sales milestone payments totaling up to $405.0 million, as well as future tiered single-digit to low double-digit royalties on global sales. We would also have worldwide rights to collaboration products, with the exception of certain collaboration products for which Nurix would retain U.S. development and commercialization rights. These rights include the opportunity for the companies to co-develop and co-commercialize up to two programs in the U.S., sharing profits and losses equally, and we would retain ex-US rights, in exchange for an option fee, milestone payments and royalties on ex-U.S. sales on a program-by-program basis. For candidates not optioned by us under the collaboration, Nurix would retain worldwide rights.

Other Collaboration Arrangements in 2015:    In addition to the collaboration arrangements described above, we entered into a number of collaborative arrangements during 2015 that include the potential for future milestone payments of up to an aggregate $120.0 million related to the attainment of specified developmental, regulatory and sales milestones over a period of several years. Our obligation to fund these efforts is contingent upon our continued involvement in the programs and/or the lack of any adverse events which could cause the discontinuance of the programs.

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Summarized financial information related to our collaboration agreements is presented below:

		Year ended December 31,										As of December 31,1
		Research and Development Expense
		Upfront Fees		Milestones		Extension/ Termination of Agreements		Amortization of Prepaid Research and Development		Equity Investments Made DuringPeriod		Intangible Asset Balance		Equity Investment Balance		Percentage of Outstanding Equity
Acceleron	2015	$	—	$	—	$	—	$	—	$	—	$	—	$	224.9	14	%
	2014	—		—		—		—		52.4		—		179.7		14	%
	2013	—		17.0		—		—		10.0
	2012 and prior	70.0		27.5		—		—		30.5
Acetylon	2015	—		—		—		20.2		15.0		0.2		30.0		14	%
	2014	—		—		—		15.3		—		20.4		25.0		10	%
	2013	50.0		—		—		4.3		10.0
	2012 and prior	—		—		—		—		15.0
Agios	2015	9.0		—		—		—		—		1.0		340.4		13	%
	2014	—		—		20.0		—		38.3		—		587.4		14	%
	2013	—		—		20.0		—		12.8
	2012 and prior	121.2		—		20.0		—		37.5
AstraZeneca	2015	450.0		—		—		—		—		—		N/A		N/A
bluebird	2015	—		—		—		4.9		—		20.2		N/A		N/A
	2014	—		—		—		0.1		—		0.1		N/A		N/A
	2013	74.7		—		—		—		—
Epizyme	2015	—		—		10.0		—		—		—		58.9		9	%
	2014	—		—		—		—		9.9		—		69.3		11	%
	2013	—		25.0		—		—		1.0
	2012	65.0		—		—		—		25.0
FORMA	2015	59.0		—		—		—		—		0.1		N/A		N/A
	2014	225.0		—		—		0.1		—		0.1		N/A		N/A
	2013	52.8		—		—		—		—
Juno	2015	575.1		—		—		—		424.9		—		401.8		9	%
Lycera	2015	87.0		—		—		—		10.0		3.0		10.0		8	%
NantBioScience2	2015	—		—		—		—		—		—		90.0		13	%
	2014	50.0		—		—		—		90.0		—		90.0		14	%
Nurix	2015	149.8		—		—		—		17.0		0.2		17.0		11	%
OncoMed	2015	2.5		70.0		—		—		—		—		33.1		5	%
	2014	2.5		—		—		—		—		—		32.0		5	%
	2013	155.0		—		—		—		22.2

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		Year ended December 31,					As of December 31,1
		Research and Development Expense
		Upfront Fees	Milestones	Extension/ Termination of Agreements	Amortization of Prepaid Research and Development	Equity Investments Made During Period	Intangible Asset Balance	Equity Investment Balance	Percentage of Outstanding Equity
Sutro	2015	—	—	—	4.8	—	22.9	17.6	16	%
	2014	72.6	—	—	0.2	11.9	12.8	17.6	15	%
	2013	—	—	—	2.1	1.7
	2012	26.3	—	—	0.2	4.0
Other Collaboration Arrangements	2015	69.8	8.0	8.1	0.9	50.0	25.0	105.4	N/A
	2014	103.5	8.3	—	7.5	55.7	34.4	132.7	N/A
	2013	243.3	1.0	—	0.9	71.7

¹ Year-end balance and percentage of outstanding equity are presented for the current and prior year.

²$25.0 million of expense related to the settlement of contingent matching contributions was also recognized in 2014 at the inception of the collaboration agreement with NantBioScience and included in Selling, General and Administrative expense.

18.   Commitments and Contingencies

Contingent Value Rights: In connection with the acquisition of Abraxis in 2010, CVRs were issued under a Contingent Value Rights Agreement, or CVR Agreement, entered into between Celgene and American Stock Transfer & Trust Company, LLC, as trustee. The CVRs are registered for trading on the NASDAQ Global Market under the symbol "CELGZ." The fair value of the liability of the Company related to payments under the CVR Agreement are subject to fluctuation based on trading prices for the publicly traded CVRs. Subsequent to the Abraxis Acquisition Date, we measured the contingent consideration represented by the CVRs at fair value with changes in fair value recognized in operating earnings. The fair value of our liability related to the CVRs was $51.9 million at the end of 2015 compared to $136.3 million at the end of 2014.

Each holder of a CVR is entitled to receive a pro rata portion, based on the number of CVRs then outstanding, of each of the following contingent cash payments:

• Milestone Payment #1.$250.0 million upon FDA approval of ABRAXANE^® for use in the treatment of NSCLC if such approval permits us to market ABRAXANE^® with FDA approval that includes a progression-free survival, or PFS, claim, but only if this milestone is achieved no later than the fifth anniversary of the Merger.

• Milestone Payment #2.$400.0 million (if achieved no later than April 1, 2013) or $300.0 million (if achieved after April 1, 2013 and before the fifth anniversary of the Merger) upon FDA approval of ABRAXANE^® for use in the treatment of pancreatic cancer, if such approval permits us to market ABRAXANE^® with FDA approval that includes an overall survival claim.

• Net Sales Payments.  For each full one-year period ending December 31 during the term of the CVR Agreement, which we refer to as a net sales measuring period (with the first net sales measuring period beginning January 1, 2011 and ending December 31, 2011):

◦ 2.5% of the net sales of ABRAXANE^® and the Abraxis pipeline products that exceed $1.000 billion but are less than or equal to $2.000 billion for such period, plus

◦ an additional amount equal to 5% of the net sales of ABRAXANE^® and the Abraxis pipeline products that exceed $2.000 billion but are less than or equal to $3.000 billion for such period, plus

◦ an additional amount equal to 10% of the net sales of ABRAXANE^® and the Abraxis pipeline products that exceed $3.000 billion for such period.

No payments will be due under the CVR Agreement with respect to net sales of ABRAXANE^® and the Abraxis pipeline products after December 31, 2025, which we refer to as the net sales payment termination date, unless net sales for the net sales measuring period ending on December 31, 2025 are equal to or greater than $1.000 billion, in which case the net sales payment termination date will be extended until the last day of the first net sales measuring period subsequent to December 31, 2025 during which net sales of ABRAXANE^® and the Abraxis pipeline products are less than $1.000 billion or, if earlier, December 31, 2030.

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Milestone Payment #1 update: In October 2012, the FDA approved ABRAXANE^® for the first-line treatment of locally advanced or metastatic NSCLC, in combination with carboplatin, in patients who are not candidates for curative surgery or radiation therapy. The FDA approval was based on tumor response rates and did not result in the use of a marketing label that includes a progression-free survival claim, and accordingly, the CVR Milestone Payment #1, as described above, has not been achieved. This approval resulted in the related $1.172 billion intangible asset obtained from the Abraxis acquisition being reclassified in October 2012 from an acquired IPR&D intangible to an acquired developed product rights intangible asset and amortization commenced in October 2012.

Milestone Payment #2 update: In September 2013, the FDA approved ABRAXANE^® for use in the treatment of pancreatic cancer, permitting us to market ABRAXANE^® with a label that includes an overall survival claim. This approval resulted in the achievement of milestone #2 and the subsequent payment of $300.0 million to CVR holders in October 2013.

Leases:  We lease offices and research facilities under various operating lease agreements in the United States and international markets. We also lease automobiles and certain equipment in these same markets. At December 31, 2015, the non-cancelable lease terms for the operating leases expire at various dates between 2016 and 2025 and include renewal options. In general, the Company is also required to reimburse the lessors for real estate taxes, insurance, utilities, maintenance and other operating costs associated with the leases.

Future minimum lease payments under non-cancelable operating leases as of December 31, 2015 are:

	Operating Leases
2016	$	56.1
2017	47.9
2018	35.1
2019	24.1
2020	19.6
Thereafter	49.5
Total minimum lease payments	$	232.3

Total rental expense under operating leases was approximately $66.2 million in 2015, $62.2 million in 2014 and $50.9 million in 2013.

Lines of Credit: We maintain lines of credit with several banks to support our hedging programs and to facilitate the issuance of bank letters of credit and guarantees on behalf of our subsidiaries. Lines of credit supporting our hedging programs as of December 31, 2015 allowed us to enter into derivative contracts with settlement dates through 2018. As of December 31, 2015, we have entered into derivative contracts with net notional amounts totaling $9.275 billion. Lines of credit facilitating the issuance of bank letters of credit and guarantees as of December 31, 2015 allowed us to have letters of credit and guarantees issued on behalf of our subsidiaries totaling $101.7 million.

Other Commitments:  Our obligations related to product supply contracts totaled $183.7 million at December 31, 2015. In addition, we have committed to invest an aggregate $20.4 million in an investment fund, which is callable at any time. We are also committed to pay the remaining $4.0 million balance due from our acquisition of a manufacturing facility in Switzerland.

Collaboration Arrangements:  We have entered into certain research and development collaboration agreements, as identified in Note 17 above, with third parties that include the funding of certain development, manufacturing and commercialization efforts with the potential for future milestone and royalty payments upon the achievement of pre-established developmental, regulatory and/or commercial targets. Our obligation to fund these efforts is contingent upon continued involvement in the programs and/or the lack of any adverse events which could cause the discontinuance of the programs. Due to the nature of these arrangements, the future potential payments are inherently uncertain, and accordingly no amounts have been recorded for the potential future achievement of these targets in our accompanying Consolidated Balance Sheets at December 31, 2015 and 2014.

Contingencies:  We believe we maintain insurance coverage adequate for our current needs. Our operations are subject to environmental laws and regulations, which impose limitations on the discharge of pollutants into the air and water and establish standards for the treatment, storage and disposal of solid and hazardous wastes. We review the effects of such laws and regulations on our operations and modify our operations as appropriate. We believe we are in substantial compliance with all applicable environmental laws and regulations.

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We have ongoing customs, duties and VAT examinations in various countries that have yet to be settled. Based on our knowledge of the claims and facts and circumstances to date, none of these matters, individually or in the aggregate, are deemed to be material to our financial condition.

Legal Proceedings:

Like many companies in our industry, we have from time to time received inquiries and subpoenas and other types of information requests from government authorities and others and we have been subject to claims and other actions related to our business activities. While the ultimate outcome of investigations, inquiries, information requests and legal proceedings is difficult to predict, adverse resolutions or settlements of those matters may result in, among other things, modification of our business practices, product recalls, costs and significant payments, which may have a material adverse effect on our results of operations, cash flows or financial condition.

Pending patent proceedings include challenges to the scope, validity and/or enforceability of our patents relating to certain of our products, uses of products or processes. Further, we are subject to claims of third parties that we infringe their patents covering products or processes. Although we believe we have substantial defenses to these challenges and claims, there can be no assurance as to the outcome of these matters and an adverse decision in these proceedings could result in one or more of the following: (i) a loss of patent protection, which could lead to a significant reduction of sales that could materially affect future results of operations, (ii) our inability to continue to engage in certain activities, and (iii) significant liabilities, including payment of damages, royalties and/or license fees to any such third party.

Among the principal matters pending are the following:

Patent Related Proceedings:

REVLIMID^®: We received Notice Letters, dated August 30, 2010, June 12, 2012 and April 3, 2014 from Natco Pharma Limited of India (Natco) notifying us of Natco’s Abbreviated New Drug Application (ANDA), which contain Paragraph IV certifications against certain of Celgene’s patents that are listed in the FDA Approved Drug Products With Therapeutic Equivalence Evaluations (the “Orange Book”) for REVLIMID^® (lenalidomide). Natco’s Notice Letters were sent in connection with its filing of an ANDA seeking permission from the FDA to market a generic version of 25mg, 15mg, 10mg and 5mg REVLIMID^® capsules. We filed separate infringement actions (which were subsequently consolidated) in the United States District Court for the District of New Jersey against Natco, Natco’s U.S. partner, Arrow International Limited (Arrow), and Arrow’s parent company, Watson Laboratories, Inc. (Watson, a wholly-owned subsidiary of Allergan plc (formerly known as Actavis, Inc.) and formerly known as Watson Pharmaceuticals, Inc.) (Natco, Arrow and Watson are collectively referred to hereinafter as “Natco”).

On December 22, 2015, we announced the settlement of the litigations with Natco. As part of the settlement, the parties filed Consent Judgments with the District Court that enjoin Natco from marketing generic lenalidomide before the April 2027 expiration of Celgene’s last-to-expire patent listed in the Orange Book for REVLIMID^®. We agreed to provide Natco with a license to Celgene’s patents required to manufacture and sell an unlimited quantity of generic lenalidomide in the United States beginning on January 31, 2026. In addition, Natco will receive a volume-limited license to sell generic lenalidomide in the United States commencing in March 2022. The volume limit is expected to be a mid-single-digit percentage of the total lenalidomide capsules dispensed in the United States during the first year of entry. The volume limitation is expected to increase gradually each 12 months until March 2025, and is not expected to exceed one-third of the total lenalidomide capsules dispensed in the U.S. in the final year of the volume-limited license. Natco’s ability to market generic lenalidomide in the U.S. will be contingent on its obtaining approval of an Abbreviated New Drug Application. The settlement agreement has been submitted to the Federal Trade Commission for review.

In 2012, our European patent EP 1667682 (the “’682 patent”) relating to certain polymorphic forms of lenalidomide expiring in 2024 was opposed in a proceeding before the European Patent Office (EPO) by Generics (UK) Ltd. and Teva Pharmaceutical Industries Ltd. On July 21, 2015, the EPO determined, based primarily on procedural grounds, that the ’682 patent was not valid. Celgene appealed the EPO ruling to the EPO Board of Appeal, which stays any revocation of the patent until the appeal is finally adjudicated. No appeal hearing date has been set. We do not anticipate a decision from the EPO Board of Appeal for several years and intend to vigorously defend all of our intellectual property rights.

In 2010, Celgene’s European patent EP1505973 (the “’973 patent”) relating to certain uses of lenalidomide expiring in 2023 was opposed in a proceeding before the EPO by Synthon B.V. and an anonymous party. On February 25, 2013, the EPO determined that the ’973 patent was not valid. Celgene appealed the EPO ruling to the EPO Board of Appeal, which stays any revocation of the patent until the appeal is finally adjudicated. No appeal hearing date has been set. We do not anticipate a decision from the EPO Board of Appeal for several years and intend to vigorously defend all of our intellectual property rights.

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We believe that our patent portfolio for lenalidomide in Europe, including the composition of matter patent which expires in 2022, is strong and defensible. Although we believe that we will prevail in the EPO proceedings, in the event these patents are found not to be valid, we expect that we will still have patent protection in the EU for lenalidomide through at least 2022.

THALOMID^® and REVLIMID^®:On October 2, 2013, Andrulis Pharmaceuticals Corporation (Andrulis) filed a lawsuit against us in the United States District Court for the District of Delaware claiming infringement of U.S. Patent No. 6,140,346 (“the ’346 patent”). Andrulis alleges that we are liable for infringement of one or more claims of the ’346 patent, which covers the use of THALOMID^® (and, as asserted by Andrulis, REVLIMID^®) in combination with an alkylating agent (e.g., melphalan) to treat cancers. Andrulis is seeking an unspecified amount of damages, attorneys’ fees and injunctive relief. We disagree with Andrulis’ allegations and intend to vigorously defend against this infringement suit. On January 30, 2014, we filed a motion to dismiss Andrulis’ amended complaint. On April 11, 2014, the court denied our motion in part and granted our motion in part, dismissing two of Andrulis' four infringement claims without leave to amend. We filed an answer to the remaining claims on April 25, 2014. In February 2015, we filed a partial summary judgment motion.

The court held hearings on claim construction and on the partial summary judgment motion on May 27, 2015 and May 28, 2015, respectively. On June 26, 2015, the court issued its claim construction ruling and held that certain claim terms were indefinite. On July 28, 2015, the court entered final judgment in favor of Celgene. On August 27, 2015, Andrulis filed a notice of appeal to the United States Court of Appeals for the Federal Circuit on the final judgment and its indefiniteness and claim construction rulings. Plaintiff's opening brief was filed on December 2, 2015 and our response is due February 16, 2016. No hearing date has been scheduled.

ISTODAX® (romidepsin): We received a Notice Letter dated March 17, 2014 from Fresenius Kabi USA, LLC (Fresenius) notifying us of Fresenius’s ANDA that seeks approval from the FDA to market a generic version of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against U.S. Patent Nos. 7,608,280 and 7,611,724 (the ’280 and ’724 patents) that are listed in the Orange Book for ISTODAX^®.

On April 30, 2014, Celgene and Astellas Pharma Inc. (Astellas), filed an infringement action in the United States District Court for the District of Delaware against Fresenius.

Celgene and Astellas have reached an agreement to settle all claims and counterclaims with Fresenius. Under the terms of the settlement agreement, which was approved by the court, the parties have stipulated to dismiss the case and Celgene will provide Fresenius a non-exclusive, royalty-free sublicense to manufacture and market the Fresenius generic product as of February 1, 2018. The settlement agreement has been submitted to the Federal Trade Commission for review.

On August 4, 2014, we received a Notice Letter from InnoPharma, Inc. (InnoPharma) notifying us of Innopharma's ANDA that seeks approval from the FDA to market a generic version of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against the ’280 and ’724 patents.

On September 12, 2014, we and Astellas, filed an infringement action in the United States District Court for the District of Delaware against InnoPharma.

Celgene and Astellas have reached an agreement to settle all claims and counterclaims with InnoPharma. Under the terms of the settlement agreement, which was approved by the court, the parties have stipulated to dismiss the case. In addition, Celgene will provide InnoPharma a non-exclusive, royalty-free sublicense to manufacture and market the InnoPharma generic product at a date after February 1, 2018 and prior to the expiration of the ’280 and ’724 patents. The settlement agreement has been submitted to the Federal Trade Commission for review.

On May 28, 2015, we received a Notice Letter from Teva Pharmaceuticals USA, Inc. (Teva) notifying us of Teva’s ANDA that seeks approval from the FDA to market a generic version of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against the '280 and '724 patents.

On July 10, 2015, we and Astellas filed an infringement action in the United States District Court for the District of Delaware against Teva. In its answer and counterclaim, Teva asserts that the ’280 and ’724 patents are invalid and/or not infringed by its proposed generic products. As a result of the filing of our action, the FDA cannot grant final approval of Teva’s ANDA until the earlier of (i) a final decision that each of the patents is invalid and/or not infringed; or (ii) November 28, 2017. Fact discovery is set to close on August 9, 2016. A claim construction hearing is scheduled for August 23, 2016. Expert discovery is set to close on April 18, 2017 and trial is scheduled to begin on June 19, 2017.

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On October 30, 2015, we received a Notice Letter from Teva notifying us of Teva’s New Drug Application pursuant to FDC Act § 505(b)(3)(D)(i) seeking approval to engage in the commercial manufacture, use or sale of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against the '280 and '724 patents.

On December 10, 2015, we and Astellas filed an infringement action in the United States District Court for the District of Delaware against Teva. As a result of the filing of our action, the FDA cannot grant final approval of Teva’s NDA until the earlier of (i) a final decision that each of the patents is invalid and/or not infringed; or (ii) April 30, 2018.

THALOMID^® (thalidomide): We received a Notice Letter dated December 18, 2014 from Lannett Holdings, Inc. (Lannett) notifying us of Lannett’s ANDA which contains Paragraph IV certifications against U.S. Patent Nos. 5,629,327; 6,045,501; 6,315,720; 6,561,976; 6,561,977; 6,755,784; 6,869,399; 6,908,432; 7,141,018; 7,230,012; 7,435,745; 7,874,984; 7,959,566; 8,204,763; 8,315,886; 8,589,188; and 8,626,531 that are listed in the Orange Book for THALOMID^® (thalidomide). Lannett is seeking to market a generic version of 50mg, 100mg, 150mg and 200mg of THALOMID^® capsules. On January 30, 2015, we filed an infringement action against Lannett in the United States District Court for the District of New Jersey. As a result of the filing of our action, the FDA cannot grant final approval of Lannett’s ANDA until the earlier of (i) a final decision that each of the patents is invalid, unenforceable, and/or not infringed; or (ii) June 22, 2017. On March 27, 2015, Lannett filed a motion to dismiss our complaint for lack of personal jurisdiction and we filed a response to the motion on April 20, 2015. A hearing was held on July 27, 2015 and the Court decided to administratively terminate the motion to dismiss in order to allow us to conduct jurisdictional discovery. On November 17, 2015, Lannett withdrew its motion to dismiss.  On December 8, 2015, Lannett filed an answer and counterclaims asserting that the patents-in-suit are invalid, unenforceable, and/or not infringed and on January 19, 2016 we filed a reply to Lannett's counterclaims. The court has not yet entered a schedule for discovery or trial.

Proceedings involving the USPTO:

Under the America Invents Act (AIA), any person may seek to challenge an issued patent by petitioning the United States Patent and Trademark Office (USPTO) to institute a post grant review. On April 23, 2015, we were informed that Coalition for Affordable Drugs VI LLC filed petitions for Inter Partes Review (IPRs) challenging the validity of Celgene’s patents US 6,045,501 and US 6,315,720 covering certain aspects of our REMS program. On October 27, 2015, the USPTO Patent Trial and Appeal Board (PTAB) instituted IPR proceedings relating to these patents. An oral hearing has been scheduled for July 21, 2016 and a decision is expected by October 27, 2016.

In accordance with the requirements of the AIA, we expect final decisions from the PTAB not later than one year after the institution of the IPRs. Any patent claim the PTAB determines to be unpatentable is stricken from the challenged patent. Any party may appeal final written decisions of the PTAB to the United States Court of Appeals for the Federal Circuit. We intend to continue to vigorously defend our patent claims.

Other Proceedings:

In 2009, we received a Civil Investigative Demand (CID) from the U.S. Federal Trade Commission (FTC) seeking documents and other information relating to requests by manufacturers of generic drugs to purchase our patented REVLIMID^® and THALOMID^® brand drugs in order for the FTC to evaluate whether there may be reason to believe that we have engaged in unfair methods of competition. In 2010, the State of Connecticut issued a subpoena referring to the same issues raised by the 2009 CID. Also in 2010, we received a second CID from the FTC relating to this matter. We continue to cooperate with the FTC and State of Connecticut investigations.

On April 3, 2014, Mylan Pharmaceuticals Inc. (Mylan) filed a lawsuit against us in the United States District Court for the District of New Jersey alleging that we violated various federal and state antitrust and unfair competition laws by allegedly refusing to sell samples of our THALOMID^® and REVLIMID^® brand drugs so that Mylan can conduct the bioequivalence testing necessary for ANDAs to be submitted to the FDA for approval to market generic versions of these products. Mylan is seeking injunctive relief, damages and declaratory judgment. We filed a motion to dismiss Mylan’s complaint on May 25, 2014. Mylan filed its opposition to our motion to dismiss on June 16, 2014. The Federal Trade Commission filed an amicus curiae brief in opposition to our motion to dismiss on June 17, 2014. On December 22, 2014, the court granted Celgene’s motion to dismiss (i) Mylan’s claims based on Section 1 of the Sherman Act (without prejudice), and (ii) Mylan's claims arising under the New Jersey Antitrust Act. The court denied our motion to dismiss the rest of the claims which primarily relate to Section 2 of the Sherman Act. On January 6, 2015 we filed a motion to certify for interlocutory appeal the order denying our motion to dismiss with respect to the claims relating to Section 2 of the Sherman Act, which appeal was denied by the United State Court of Appeals for the Third Circuit on March 5, 2015. On January 20, 2015, we filed an answer to Mylan’s complaint. Fact discovery is set to close April 8, 2016 and expert discovery is set to be completed by October 24, 2016. No trial date has been set. We intend to vigorously defend against Mylan’s claims.

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In 2011, the United States Attorney’s Office for the Central District of California informed us that they were investigating possible off-label marketing and improper payments to physicians in connection with the sales of THALOMID^® and REVLIMID^®. In 2012, we learned that two other United States Attorneys’ offices (the Northern District of Alabama and the Eastern District of Texas) and various state Attorneys General were conducting related investigations. In February 2014, three civil qui tam actions related to those investigations brought by three former Celgene employees on behalf of the federal and various state governments under the federal false claims act and similar state laws were unsealed after the United States Department of Justice (DOJ) declined to intervene in any of these actions. The DOJ retains the right to intervene in these actions at any time. Additionally, while several states have similarly declined to intervene in some of these actions, they also retain the right to intervene in the future. The plaintiffs in the Northern District of Alabama and Eastern District of Texas actions have voluntarily dismissed their cases. On April 25, 2014, we filed a motion to dismiss the complaint in the remaining (Central District of California) action, United States of America ex. rel. Beverly Brown V. Celgene Corp., unsealed February 5, 2014 (the Brown Action), which was denied except with respect to certain state claims. We filed our answer to the complaint on August 28, 2014. Fact discovery closed on September 25, 2015. On January 21, 2016, the court vacated the expert discovery deadline. Summary judgment motions are to be filed jointly with the court by April 18, 2016. No trial date has been set. We intend to vigorously defend against the claims in the Brown Action.

In February 2014, we received a letter purportedly on behalf of a stockholder demanding access to certain books and records of the Company for the purpose of investigating matters pertaining to the Brown Action. The Company complied with the demand, as modified through negotiation with counsel for the purported stockholder. In July 2014, we received a letter purportedly on behalf of two stockholders (one of which was referenced in the February 2014 letter) that demands, primarily on the basis of the allegations in the Brown Action, that our board of directors take action on the Company’s behalf to correct alleged deficiencies in the Company’s internal controls and to recover from current and past directors and officers damages those stockholders allege to have resulted from breaches of fiduciary duties related to the matters alleged in the Brown Action (the Demand). Our Board formed a Demand Investigation Committee, and with the assistance of independent counsel retained by it, the Demand Investigation Committee considered the issues raised in the stockholders’ letter. In October 2015, the Demand Investigation Committee reported to the Board of Directors, and the Board of Directors accepted the Committee’s recommendation, that the Company take no action at this time, legal or otherwise, in response to the stockholders’ demands. In November 2015, we received another letter purportedly on behalf of the same two stockholders that demands access to certain books and records of the Company for the purpose of investigating whether the Demand was wrongfully refused, the independence, good faith and due care of the Demand Investigation Committee, and whether the Demand Investigation Committee conducted a reasonable investigation of the Demand. The Company is in the process of responding to this latest letter.

In November 2014, we received another letter purportedly on behalf of a stockholder demanding access to certain books and records of the Company for the purpose of investigating matters pertaining to the Brown Action. The Company complied with the demand, as modified through negotiation with counsel for the purported stockholder, and in November 2015 the stockholder filed a complaint in Delaware Chancery Court asserting derivative claims on behalf of the Company against eight current, and four former members of the Board of Directors. The complaint alleges, largely on the basis of allegations in the Brown Action, that the defendant directors breached their fiduciary duties by allowing the Company to engage in unlawful activity in its marketing of THALOMID and REVLIMID, and seeks from the defendant directors unspecified damages, including Celgene’s costs of defending against government and civil investigations and lawsuits and alleged reputational harm, and disgorgement of compensation paid to the defendant directors. On January 22, 2016, the Company filed a motion to dismiss the complaint on the basis that prior to filing the complaint asserting derivative claims the plaintiff was required under Delaware law and failed to demand that our board of directors take action on the Company’s behalf. Oral argument on the motion has not yet been scheduled.

On June 7, 2013, Children's Medical Center Corporation (CMCC) filed a lawsuit against us in the Superior Court of the Commonwealth of Massachusetts alleging that our obligation to pay a 1% royalty on REVLIMID^® net sales revenue and a 2.5% royalty on POMALYST^®/IMNOVID^® net sales revenue under a license agreement entered into in December 2002 extended beyond February 28, 2013 and that our failure to make royalty payments to CMCC subsequent to February 28, 2013 breached the license agreement. CMCC is seeking unspecified damages and a declaration that the license agreement remains in full force and effect. In July 2013, we removed these proceedings to the United States District Court for the District of Massachusetts. On August 5, 2013, we filed an answer to CMCC’s complaint and a counterclaim for declaratory judgment that our obligations to pay royalties have expired. On August 26, 2013, CMCC filed an answer to our counterclaim.

On July 8, 2014, CR Rev Holdings, LLC (“CR Rev”) filed a complaint against Celgene in the same action. CR Rev alleges that CMCC sold and assigned a substantial portion of the royalty payments owed by Celgene on the sale of REVLIMID^® to CR Rev. CR Rev has alleged causes of action with respect to REVLIMID^® identical to those alleged by CMCC, and seeks unspecified damages and a declaration that the license agreement is still in effect. 

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Discovery in this matter has been completed. On August 4, 2015, Plaintiffs filed a motion for summary judgment on certain claims, including breach of contract, declaratory judgment and, with respect to Celgene’s counterclaims, patent misuse.  Oral argument on the motion was held on October 21, 2015.  No trial date has as yet been set by the court.

We intend to vigorously defend against CMCC's and CR Rev’s claims. As of December 31, 2015, we consider the range of reasonably possible loss relating to this lawsuit to be between zero and $141.3 million, with the high end of the range being the royalty payments on REVLIMID^® we would have made to CMCC under the license agreement through December 31, 2015, if our obligation to pay royalties remained in effect. CMCC contends that our royalty obligation continues on net sales of REVLIMID^®, as well as POMALYST^®/IMNOVID^®, at least until May 2016. If CMCC prevails, we may be obligated to continue to pay royalties on sales for periods after December 31, 2015.

On October 2, 2014, a complaint was filed in Delaware Chancery Court by a stockholder asserting derivative claims on behalf of the Company against the non-employee members of the Board of Directors. The complaint, as subsequently amended, alleged that equity grants made to non-employee directors in 2012, 2013 and 2014 were excessive compared to the equity grants to directors of peer companies, and that the award of such allegedly excessive compensation constituted a breach of fiduciary duty, waste of corporate assets, and unjust enrichment. On September 14, 2015, the parties agreed to settle all claims in the case, subject to the Chancery Court’s approval of the settlement. The settlement was approved by the court in December 2015. The settlement provides prospective relief only, setting limits on equity grants to non-employee directors for at least four years and requiring certain changes in the charter of the Board’s compensation committee and certain disclosures concerning non-employee director compensation.

On November 7, 2014, the International Union of Bricklayers and Allied Craft Workers Local 1 Health Fund (IUB) filed a putative class action lawsuit against us in the United States District Court for the District of New Jersey alleging that we violated various state antitrust, consumer protection, and unfair competition laws by (a) allegedly securing an exclusive supply contract with Seratec S.A.R.L. so that Barr Laboratories (“Barr”) allegedly could not secure its own supply of thalidomide active pharmaceutical ingredient; (b) allegedly refusing to sell samples of our THALOMID^® and REVLIMID^® brand drugs to Mylan Pharmaceuticals, Lannett Company, and Dr. Reddy’s Laboratories so that those companies can conduct the bioequivalence testing necessary for ANDAs to be submitted to the FDA for approval to market generic versions of these products; and (c) allegedly bringing unjustified patent infringement lawsuits against Barr and Natco Pharma Limited in order to allegedly delay those companies from obtaining approval for proposed generic versions of THALOMID^® and REVLIMID^®. IUB, on behalf of itself and a putative class of third party payers, is seeking injunctive relief and damages. On February 6, 2015, we filed a motion to dismiss IUB’s complaint. On March 3, 2015, the City of Providence (“Providence”) filed a similar putative class action making similar allegations. Both IUB and Providence, on behalf of themselves and a putative class of third party payers, are seeking injunctive relief and damages. Providence agreed that the decision in the motion to dismiss IUB’s complaint would apply to the identical claims in Providence’s complaint. A supplemental motion to dismiss Providence's state law claims was filed on April 20, 2015. On October 30, 2015, the court denied our motion to dismiss on all grounds.

Celgene filed its Answer to the IUB and Providence complaints on January 11, 2016. The completion of fact discovery and expert discovery is scheduled for August 1, 2017 and December 15, 2017, respectively. No trial date has been set. We intend to vigorously defend against IUB’s claims.

On July 20, 2015, a putative class action lawsuit, Scott v. Receptos, Inc., related to our acquisition of Receptos, was commenced by the filing of a complaint in the Court of Chancery for the State of Delaware, Case No. 11316, against Receptos, members of the Receptos Board, Celgene and Celgene’s wholly-owned subsidiary, Strix Corporation, which is a party to the acquisition agreement. Four other complaints, Cacioppo v. Hasnain and Rosenberg v. Receptos, Inc. (Cases Nos. 11324 and 11325) filed on July 23, and Kadin v. Receptos, Inc., filed on July 27 (Case No. 11337), and Rockaway v. Hasnain (Case No. 11346) filed on July 28, 2015 raise similar putative class claims in the Court of Chancery for the State of Delaware against some or all of Receptos, members of the Receptos Board, Celgene, and Strix Corporation. These complaints generally allege breaches of fiduciary duty by members of the Receptos Board in connection with the Merger Agreement. In the Scott, Rosenberg and Kadin actions, the plaintiffs also allege that Celgene and Strix Corporation aided and abetted the purported breaches of fiduciary duty. On August 17, 2015, all parties to these actions entered into a Memorandum of Understanding (MOU), which sets forth the parties’ agreement in principle for a settlement of the actions. The MOU contemplates that the parties will seek to enter into a stipulation of settlement providing for a global release of claims relating to the acquisition as set forth in the MOU. The claims will not be released until such stipulation of settlement is approved by the Court of Chancery of the State of Delaware. Although the parties are in the process of negotiating the terms of the stipulation of settlement, there can be no assurance that the parties will ultimately enter into a stipulation of settlement or that the court will approve such settlement even if the parties were to enter into such stipulation. The settlement did not affect the consideration received by Receptos’ stockholders in connection with the acquisition. As part of the settlement, Receptos agreed to make certain additional disclosures related to the acquisition.

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19.   Geographic and Product Information

Operations by Geographic Area:    Revenues primarily consisted of sales of REVLIMID^®, ABRAXANE^®, POMALYST^®/IMNOVID^®, OTEZLA^®, VIDAZA^®, azacitidine for injection, THALOMID^®, and ISTODAX^®. Additional sources of revenue included a licensing agreement with Novartis, which entitles us to royalties on FOCALIN XR^® and the entire RITALIN^® family of drugs, the sale of services through our Cellular Therapeutics subsidiary and other miscellaneous licensing agreements.

Revenues	2015		2014		2013
United States	$	5,604.0	$	4,482.8	$	3,862.1
Europe	2,624.3		2,310.8		1,865.7
All other	1,027.7		876.8		766.1
Total revenues	$	9,256.0	$	7,670.4	$	6,493.9

Long-Lived Assets1	2015		2014
United States	$	585.5	$	406.1
Europe	215.2		222.2
All other	13.4		14.3
Total long lived assets	$	814.1	$	642.6

¹  Long-lived assets consist of net property, plant and equipment.

Revenues by Product: Total revenues from external customers by product for the years ended December 31, 2015, 2014 and 2013 were as follows:

	2015		2014		2013
REVLIMID®	$	5,801.1	$	4,980.0	$	4,280.3
ABRAXANE®	967.5		848.2		648.9
POMALYST®/IMNOVID®	983.3		679.7		305.4
OTEZLA®	471.7		69.8		—
VIDAZA®	590.7		611.9		803.3
azacitidine for injection	83.9		78.2		23.3
THALOMID®	185.4		221.2		244.5
ISTODAX®	69.1		65.6		54.0
Other	8.4		9.2		2.6
Total net product sales	9,161.1		7,563.8		6,362.3
Other revenue	94.9		106.6		131.6
Total revenue	$	9,256.0	$	7,670.4	$	6,493.9

Major Customers: We sell our products primarily through wholesale distributors and specialty pharmacies in the United States, which account for a large portion of our total revenues. International sales are primarily made directly to hospitals, clinics and retail chains, many of which are government owned. During the three-year period of 2015, 2014 and 2013, customers that accounted for more than 10% of our total revenue in at least one of those years are summarized below. The percentage of amounts due from these customers compared to total net accounts receivable is also summarized below as of December 31, 2015 and 2014.

	Percent of Total Revenue						Percent of Net Accounts Receivable
Customer	2015		2014		2013		2015		2014
Amerisource Bergen Corp.	8.1	%	9.0	%	10.7	%	8.2	%	9.7	%
CVS	10.7	%	9.8	%	9.3	%	8.2	%	7.6	%

116

CELGENE CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

20.   Quarterly Results of Operations (Unaudited)

2015	1Q		2Q		3Q3			4Q		Year
Total revenue	$	2,080.8	$	2,277.8	$	2,334.1		$	2,563.3	$	9,256.0
Gross profit1	1,951.2		2,153.3		2,202.7			2,433.8		8,741.0
Income tax provision	108.2		114.6		14.2			184.5		421.5
Net income (loss)	718.9		356.2		(34.1		)	561.0		1,602.0
Net income (loss) per share:2
Basic	$	0.90	$	0.45	$	(0.04	)	$	0.71	$	2.02
Diluted	$	0.86	$	0.43	$	(0.04	)	$	0.69	$	1.94
Weighted average shares:
Basic	798.9		793.0		791.1			785.8		792.2
Diluted	834.1		825.3		791.1			816.5		824.9

2014	1Q4		2Q		3Q		4Q		Year
Total revenue	$	1,730.0	$	1,872.7	$	1,982.2	$	2,085.5	$	7,670.4
Gross profit1	1,621.4		1,745.7		1,859.1		1,951.7		7,177.9
Income tax provision	52.6		109.0		69.0		96.9		327.5
Net income	279.7		597.8		508.5		613.9		1,999.9
Net income per share:2
Basic	$	0.34	$	0.75	$	0.64	$	0.77	$	2.49
Diluted	$	0.33	$	0.72	$	0.61	$	0.74	$	2.39
Weighted average shares:
Basic	811.5		799.6		799.6		800.2		802.7
Diluted	845.1		831.0		832.8		834.6		836.0

¹  Gross profit is computed by subtracting cost of goods sold (excluding amortization of acquired intangible assets) from net product sales.

²  The sum of the quarters may not equal the full year due to rounding. In addition, quarterly and full year basic and diluted earnings per share are calculated separately.

³  Net income for 2015 was a loss in the third quarter primarily due to costs related to collaborations and the acquisition of Receptos.

⁴  Net income for 2014 was lower in the first quarter compared to each of the other three quarters primarily due to a higher level of expense related to research and development collaborations.

117

ITEM 9.    CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A.    CONTROLS AND PROCEDURES

CONCLUSION REGARDING THE EFFECTIVENESS OF DISCLOSURE CONTROLS AND PROCEDURES

As of the end of the period covered by this Annual Report on Form 10-K, we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in the Exchange Act Rules 13a-15(e) and 15d-15(e)) (the "Exchange Act"). Based on the foregoing evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures are effective to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the Securities and Exchange Commission and that such information is accumulated and communicated to our management (including our Chief Executive Officer and Chief Financial Officer) to allow timely decisions regarding required disclosures.

CHANGES IN INTERNAL CONTROLS OVER FINANCIAL REPORTING

There were no changes in our internal control over financial reporting during the fiscal quarter ended December 31, 2015 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Our management is responsible for establishing and maintaining adequate internal control over financial reporting and for the assessment of the effectiveness of internal control over financial reporting. As defined by the Securities and Exchange Commission, internal control over financial reporting is a process designed by, or under the supervision of, our principal executive and principal financial officers and effected by our Board of Directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the consolidated financial statements in accordance with U.S. generally accepted accounting principles.

Our 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 our transactions and dispositions of our assets; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of the consolidated financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on the consolidated 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 connection with the preparation of our annual consolidated financial statements, management has undertaken an assessment of the effectiveness of our internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013, or the COSO Framework. Management's assessment included an evaluation of the design of our internal control over financial reporting and testing of the operational effectiveness of those controls.

Based on this evaluation, management has concluded that our internal control over financial reporting was effective as of December 31, 2015.

KPMG LLP, the independent registered public accounting firm that audited our consolidated financial statements included in this report, has issued their report on the effectiveness of internal control over financial reporting as of December 31, 2015, a copy of which is included herein.

118

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders

Celgene Corporation:

We have audited Celgene Corporation and subsidiaries' internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013, or COSO. Celgene Corporation and subsidiaries' 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 Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the effectiveness of Celgene Corporation and subsidiaries' internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). 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, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

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, Celgene Corporation and subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control-Integrated Framework issued by COSO in 2013.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Celgene Corporation and subsidiaries as of December 31, 2015 and 2014, and the related consolidated statements of income, comprehensive income, cash flows, and stockholders' equity for each of the years in the three-year period ended December 31, 2015, and our report dated February 11, 2016 expressed an unqualified opinion on those consolidated financial statements.

/s/ KPMG LLP

Short Hills, New Jersey

February 11, 2016

119

ITEM 9B.    OTHER INFORMATION

None.

PART III

ITEM 10.    DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Pursuant to Paragraph G(3) of the General Instructions to Form 10-K, the information required by Part III (Items 10, 11, 12, 13 and 14) is being incorporated by reference herein from our definitive proxy statement (or an amendment to our Annual Report on Form 10-K) to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2015 in connection with our 2016 Annual Meeting of Stockholders.

ITEM 11.    EXECUTIVE COMPENSATION

See Item 10.

ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

See Item 10.

ITEM 13.    CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

See Item 10.

ITEM 14.    PRINCIPAL ACCOUNTANT FEES AND SERVICES

See Item 10.

120

PART IV

ITEM 15.    EXHIBITS, FINANCIAL STATEMENT SCHEDULES

	Page
(a) 1. Consolidated Financial Statements
Report of Independent Registered Public Accounting Firm	60
Consolidated Balance Sheets as of December 31, 2015 and 2014	61
Consolidated Statements of Income – Years Ended December 31, 2015, 2014 and 2013	62
Consolidated Statements of Comprehensive Income – Years Ended December 31, 2015, 2014 and 2013	63
Consolidated Statements of Cash Flows – Years Ended December 31, 2015, 2014 and 2013	64
Consolidated Statements of Stockholders' Equity – Years Ended December 31, 2015, 2014 and 2013	66
Notes to Consolidated Financial Statements	67
(a) 2. Financial Statement Schedule
Schedule II – Valuation and Qualifying Accounts	127
(a) 3. Exhibit Index
The following exhibits are filed with this report or incorporated by reference:

121

Exhibit No.	Exhibit Description
2.1	Agreement and Plan of Merger, dated as of November 18, 2007, among Pharmion Corporation, Celgene Corporation and Cobalt Acquisition LLC (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K filed on November 19, 2007).
2.2	Agreement and Plan of Merger dated as of June 30, 2010, among Celgene Corporation, Artistry Acquisition Corp. and Abraxis Bioscience, Inc. (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K filed on July 1, 2010).
2.3	Agreement and Plan of Merger dated as of July 14, 2015 among Receptos, Inc., Celgene Corporation and Strix Corporation (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed on July 15, 2015).
3.1	Certificate of Incorporation of the Company, as amended June 18, 2014 (incorporated by reference to Exhibit 3.1 to the Company's Quarterly Report on Form 10-Q filed July 29, 2014).
3.2	Bylaws of the Company (incorporated by reference to Exhibit 2 to the Company's Current Report on Form 8-K, dated September 16, 1996), as amended effective May 1, 2006 (incorporated by reference to Exhibit 3.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2006), as further amended effective December 16, 2009 (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed on December 17, 2009), as further amended effective February 17, 2010 (incorporated by reference to Exhibit 3.2 to the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2009) and as further amended effective October 14, 2015 (incorporated by reference to Exhibit 3.2 to the Company’s Quarterly Report on Form 10-Q filed November 5, 2015).
4.1	Contingent Value Rights Agreement, dated as of October 15, 2010, between Celgene Corporation and American Stock Transfer & Trust Company, LLC, as trustee, including the Form of CVR Certificate as Annex A (incorporated by reference to Exhibit 4.1 to the Company's Form 8-A12B filed on October 15, 2010).
4.2	Indenture, dated as of October 7, 2010, relating to the 2.450% Senior Notes due 2015, 3.950% Senior Notes due 2020 and 5.700% Senior Notes due 2040, between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed on October 7, 2010).
4.3	Indenture, dated as of August 9, 2012, relating to the 1.900% Senior Notes due 2017 and 3.250% Senior Notes due 2022, between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed on August 9, 2012).
4.4	Indenture, dated as of August 6, 2013, relating to the 2.300% Senior Notes due 2018, 4.000% Senior Notes due 2023 and the 5.250% Senior Notes due 2043, between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed on August 6, 2013).
4.5	Indenture, dated as of May 15, 2014, relating to the 2.250% Senior Notes due 2019, 3.625% Senior Notes due 2024 and the 4.625% Senior Notes due 2044, between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 to the Company's Current Report on Form 8-K filed on May 15, 2014).
4.6	Form of 2.450% Senior Notes due 2015 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed on October 7, 2010).
4.7	Form of 3.950% Senior Notes due 2020 (incorporated by reference to Exhibit 4.3 to the Company's Current Report on Form 8-K filed on October 7, 2010).
4.8	Form of 5.700% Senior Notes due 2040 (incorporated by reference to Exhibit 4.4 to the Company's Current Report on Form 8-K filed on October 7, 2010).
4.9	Form of 1.900% Senior Notes due 2017 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed on August 9, 2012).
4.10	Form of 3.250% Senior Notes due 2022 (incorporated by reference to Exhibit 4.3 to the Company's Current Report on Form 8-K filed on August 9, 2012).
4.11	Form of 2.300% Senior Notes due 2018 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed on August 6, 2013).
4.12	Form of 4.000% Senior Notes due 2023 (incorporated by reference to Exhibit 4.3 to the Company's Current Report on Form 8-K filed on August 6, 2013).
4.13	Form of 5.250% Senior Notes due 2043 (incorporated by reference to Exhibit 4.4 to the Company's Current Report on Form 8-K filed on August 6, 2013).
4.14	Form of 2.250% Senior Notes due 2019 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed on May 15, 2014).

122

Exhibit No.	Exhibit Description
4.15	Form of 3.625% Senior Notes due 2024 (incorporated by reference to Exhibit 4.3 to the Company's Current Report on Form 8-K filed on May 15, 2014).
4.16	Form of 4.625% Senior Notes due 2044 (incorporated by reference to Exhibit 4.4 to the Company's Current Report on Form 8-K filed on May 15, 2014).
4.17	Form of 2.125% Senior Notes due 2018 (incorporated by reference to Exhibit 4.2 to the Company's Current Report on Form 8-K filed on August 12, 2015).
4.18	Form of 2.875% Senior Notes due 2020 (incorporated by reference to Exhibit 4.3 to the Company's Current Report on Form 8-K filed on August 12, 2015).
4.19	Form of 3.550% Senior Notes due 2022 (incorporated by reference to Exhibit 4.4 to the Company's Current Report on Form 8-K filed on August 12, 2015).
4.20	Form of 3.875% Senior Notes due 2025 (incorporated by reference to Exhibit 4.5 to the Company's Current Report on Form 8-K filed on August 12, 2015).
4.21	Form of 5.000% Senior Notes due 2045 (incorporated by reference to Exhibit 4.6 to the Company's Current Report on Form 8-K filed on August 12, 2015).
10.1	1992 Long-Term Incentive Plan (incorporated by reference to Exhibit A to the Company's Proxy Statement dated May 30, 1997), as amended by Amendment No. 1 thereto, effective as of June 22, 1999 (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2002).
10.2	1995 Non Employee Directors' Incentive Plan (incorporated by reference to Exhibit A to the Company's Proxy Statement, dated May 24, 1999), as amended by Amendment No. 1 thereto, effective as of June 22, 1999 (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2002), as further amended by Amendment No. 2 thereto, effective as of April 18, 2000 (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2002), as further amended by Amendment No. 3 thereto, effective as of April 23, 2003 (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2005), as further amended by Amendment No. 4 thereto, effective as of April 5, 2005 (incorporated by reference to Exhibit 99.2 to the Company's Registration Statement on Form S-8 (No. 333-126296)), as amended by Amendment No. 5 thereto (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2007), as further amended by Amendment No. 6 thereto (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2008).
10.3	Form of Indemnification Agreement between the Company and each officer and director of the Company (incorporated by reference to Exhibit 10.12 to the Company's Annual Report on Form 10-K for the year ended December 31, 1996).
10.4	Amended and Restated Employment Agreement effective May 1, 2006 between the Company and Robert J. Hugin (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2006), as amended by Amendment No. 1 thereto, effective as of December 31, 2008 (incorporated by reference to Exhibit 10.8 to the Company's Annual Report on Form 10-K for the year ended December 31, 2008), as further amended by Amendment No. 2 thereto, effective as of June 16, 2010 (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K filed on June 18, 2010).
10.5	Celgene Corporation 2008 Stock Incentive Plan, as amended and restated as of April 17, 2013 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on June 13, 2013), as amended by Amendment No. 1 thereto, effective as of April 17, 2014 (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on June 19, 2014).
10.6	Development and License Agreement between the Company and Novartis Pharma AG, dated April 19, 2000 (incorporated by reference to Exhibit 10.21 to the Company's Annual Report on Form 10-K for the year ended December 31, 2000).
10.7	Collaborative Research and License Agreement between the Company and Novartis Pharma AG, dated December 20, 2000 (incorporated by reference to Exhibit 10.22 to the Company's Annual Report on Form 10-K for the year ended December 31, 2000).
10.8	Celgene Corporation 2005 Deferred Compensation Plan, effective as of January 1, 2005 (incorporated by reference to Exhibit 10.22 to the Company's Annual Report on Form 10-K for the year ended December 31, 2004), as amended and restated, effective January 1, 2008 (incorporated by reference to Exhibit 10.4 to the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2008, filed on May 12, 2008).

123

Exhibit No.	Exhibit Description
10.11	Technical Services Agreement among the Company, Celgene UK Manufacturing II, Limited (f/k/a Penn T Limited), Penn Pharmaceutical Services Limited and Penn Pharmaceutical Holding Limited, dated October 21, 2004 (incorporated by reference to Exhibit 10.33 to the Company's Annual Report on Form 10-K for the year ended December 31, 2004).
10.13	Finished Goods Supply Agreement between the Company and Penn Pharmaceutical Services Limited, dated September 8, 2004 (certain portions of the agreement have been redacted and filed separately with the Securities and Exchange Commission pursuant to a request for confidential treatment, which has been granted) (incorporated by reference to Exhibit 10.52 to the Company's Annual Report on Form 10-K for the year ended December 31, 2005).

10.14	Distribution Services and Storage Agreement between the Company and Sharp Corporation, dated January 1, 2005 (certain portions of the agreement have been redacted and filed separately with the Securities and Exchange Commission pursuant to a request for confidential treatment, which has been granted) (incorporated by reference to Exhibit 10.53 to the Company's Annual Report on Form 10-K for the year ended December 31, 2005).
10.15	Non-Competition, Non-Solicitation and Confidentiality Agreement between Celgene Corporation and Dr. Patrick Soon-Shiong, dated as of June 30, 2010 (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K filed on July 1, 2010).
10.16	Stockholders' Agreement among Celgene Corporation, Dr. Patrick Soon-Shiong, California Capital LP, Patrick Soon-Shiong 2009 GRAT 1, Patrick Soon-Shiong 2009 GRAT 2, Michele B. Soon-Shiong GRAT 1, Michele B. Soon-Shiong GRAT 2, Soon-Shiong Community Property Revocable Trust, California Capital Trust and Michele B. Chan Soon-Shiong, dated as of June 30, 2010 (incorporated by reference to Exhibit 10.4 to the Company's Current Report on Form 8-K filed on July 1, 2010).
10.17	Letter Agreement between the Company and Jacqualyn A. Fouse, dated August 18, 2010 (incorporated by reference to Exhibit 99.2 to the Company's Current Report on Form 8-K filed on August 27, 2010).
10.18	Amended and Restated Credit Agreement among Celgene Corporation, the lender parties named therein, and Citibank, N.A., as administrative agent, dated as of April 18, 2013 (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on April 19, 2013).
10.19	Celgene Corporation Management Incentive Plan (incorporated by reference to Exhibit 10.19 to the Company's Annual Report on Form 10-K for the year ended December 31, 2013).
10.20	Form of Stock Option Agreement (incorporated by reference to Exhibit 10.20 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2012).
10.21	Form of Restricted Stock Unit Agreement (incorporated by reference to Exhibit 10.21 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2012).
10.22	Letter agreement with Mark J. Alles (incorporated by reference to Exhibit 10. 1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2013).
10.23	Letter agreement with Thomas O. Daniel, M.D. (incorporated by reference to Exhibit 10. 2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2013).
10.25†	License Agreement among the Company, Celgene Alpine Investment Company II LLC and Nogra Pharma Limited, dated as of April 23, 2014 (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed July 29, 2014).
10.26	Letter Agreement between the Company and Peter N. Kellogg, dated May 21, 2014 (incorporated by reference to Exhibit 99.2 to the Company’s Current Report on Form 8-K filed on May 22, 2014).
10.27	Letter Agreement between the Company and Scott Smith, dated July 27, 2015 (incorporated by reference to Exhibit 10.27 to the Company’s Current Report on Form 10-Q filed on July 28, 2015).
21.1*	List of Subsidiaries.
23.1*	Consent of KPMG LLP.
24.1*	Power of Attorney
31.1*	Certification by the Company's Chief Executive Officer.
31.2*	Certification by the Company's Chief Financial Officer.
32.1*	Certification by the Company's Chief Executive Officer pursuant to 18 U.S.C. Section 1350.
32.2*	Certification by the Company's Chief Financial Officer pursuant to 18 U.S.C. Section 1350.

124

Exhibit No.

Exhibit Description

101*

The following materials from Celgene Corporation's Annual Report on Form 10-K for the year ended December 31, 2015, formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Income, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Cash Flows, (v) the Consolidated Statements of Stockholders' Equity and (vi) Notes to Consolidated Financial Statements.

*Filed herewith.

† Confidential treatment requested as to certain portions, which portions have been omitted and submitted separately to the Securities and Exchange Commission

125

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.

CELGENE CORPORATION
By:	/s/ Robert J. Hugin Robert J. Hugin Chief Executive Officer (principal executive officer)

________________________________________________________________________________________________________________________

Date: February 11, 2016

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.

Signature	Title	Date
/s/ Robert J. Hugin Robert J. Hugin	Chairman of the Board; Chief Executive Officer (principal executive officer)	February 11, 2016
/s/ Peter N. Kellogg Peter N. Kellogg	Chief Financial Officer (principal financial and accounting officer)	February 11, 2016
* Richard W. Barker	Director	February 11, 2016
* Michael W. Bonney	Director	February 11, 2016
* Michael D. Casey	Director	February 11, 2016

* Carrie S. Cox	Director	February 11, 2016
* Michael A. Friedman	Director	February 11, 2016
* Julia A. Haller	Director	February 11, 2016
* Gilla Kaplan	Director	February 11, 2016
* James Loughlin	Director	February 11, 2016
* Ernest Mario	Director	February 11, 2016

*By: /s/ Robert J. Hugin

Robert J. Hugin

Attorney-in-fact

126

Celgene Corporation and Subsidiaries

Schedule II – Valuation and Qualifying Accounts

(In Millions)

Year ended December 31,	Balance at Beginning of Year		Charged to Expense or Sales				Deductions		Balance at End of Year
2015:
Allowance for doubtful accounts	$	20.6	$	(0.1	)		$	2.4	$	18.1
Allowance for customer discounts	11.5		111.7			1	111.0		12.2
Subtotal	32.1		111.6				113.4		30.3
Allowance for sales returns	10.2		16.3			1	9.1		17.4
Total	$	42.3	$	127.9			$	122.5	$	47.7
2014:
Allowance for doubtful accounts	$	27.9	$	(2.7	)		$	4.6	$	20.6
Allowance for customer discounts	12.1		87.9			1	88.5		11.5
Subtotal	40.0		85.2				93.1		32.1
Allowance for sales returns	15.5		2.5			1	7.8		10.2
Total	$	55.5	$	87.7			$	100.9	$	42.3
2013:
Allowance for doubtful accounts	$	21.8	$	6.2			$	0.1	$	27.9
Allowance for customer discounts	11.2		74.3			1	73.4		12.1
Subtotal	33.0		80.5				73.5		40.0
Allowance for sales returns	13.3		9.6			1	7.4		15.5
Total	$	46.3	$	90.1			$	80.9	$	55.5

¹  Amounts are a reduction from gross sales.

127

EX-21.1

Exhibit 21.1

LIST OF SUBSIDIARIES

Name	State or Other Jurisdiction of Incorporation
Celgene Inc.	Canada
Abraxis Bioscience Australia Pty Ltd.	Australia
Abraxis BioScience International Holding Company, Inc.	Delaware
Abraxis BioScience Limited	Hong Kong
Abraxis BioScience Puerto Rico, LLC	Puerto Rico
Abraxis BioScience Service (Beijing) Co. Ltd. Beijing, P.R.C.	People’s Republic of China
Abraxis BioScience, Inc.	Delaware
Abraxis BioScience, LLC	Delaware
AHI Investment, LLC	Delaware
Anthrogenesis Corporation	New Jersey
Apoptos, Inc.	Delaware
Cabrellis Pharmaceuticals Corp.	Delaware
Celgene Kft	Hungary
Celgene Ab	Finland
Celgene AB	Sweden
Celgene Alpine Investment Co. III, LLC	Delaware
Celgene Alpine Investment. Co. II, LLC	Delaware
Celgene Alpine Investment. Co., LLC	Delaware
Celgene ApS	Denmark
Celgene AS	Norway
Celgene Avilomics Research, Inc.	Delaware
Celgene Brasil Productos Farmaceuticos Ltda.	Brazil
Celgene BV	Netherlands
Celgene BVBA	Belgium
Celgene Chemicals Sarl	Switzerland
Celgene Co.	South Korea
Celgene Europe, Limited	United Kingdom
Celgene European Investment Co. LLC	Delaware
Celgene Financing Company, LLC	Delaware
Celgene FZE	Dubai
Celgene GmbH	Austria
Celgene GmbH	Germany
Celgene GmbH	Switzerland
Celgene Holdings East Corp.	New Jersey
Celgene Holdings II Sarl	Switzerland
Celgene Holdings III Sarl	Switzerland
Celgene Holdings Sarl	Switzerland
Celgene International Holdings Corporation	Delaware
Celgene International II Sarl	Switzerland
Celgene International SARL	Switzerland

Celgene International, Inc.	Delaware
Celgene KK	Japan
Celgene Limited	Hong Kong
Celgene Limited	Ireland
Celgene Limited	Taiwan
Celgene Limited	United Kingdom
Celgene Limited	New Zealand
Celgene llac Pazarlama ve Tic.Ltd. Sti.	Turkey
Celgene Logistics II Sarl	Switzerland
Celgene Logistics Sarl	Switzerland
Celgene Ltd	Thailand
Celgene Luxembourg Finance Company SARL	Luxembourg
Celgene Luxembourg SARL	Luxembourg
Celgene Management Sarl	Switzerland
Celgene Netherlands BV	Netherlands
Celgene Netherlands II BV	Netherlands
Celgene Netherlands Investment, B.V.	Netherlands
Celgene NJ Investment Co.	New Jersey
Celgene Pharmaceuticals Information Consulting Co., Ltd (Shanghai)	China
Celgene PTE Ltd	Singapore
Celgene Pty Limited	Australia
Celgene Puerto Rico Distribution LLC	Puerto Rico
Celgene Quanticel Research, Inc.	Delaware
Celgene R&D Sarl	Switzerland
Celgene Receptos Sarl	Switzerland
Celgene Research and Development, LLC	Delaware
Celgene Research and Investment Company LLC	Delaware
Celgene Research Investment Company II, LLC	Delaware
Celgene Research, SL	Spain
Celgene RIVOT II Ltd.	Bermuda
Celgene RIVOT III Ltd.	Bermuda
Celgene RIVOT LLC	Delaware
Celgene RIVOT Ltd.	Bermuda
Celgene S.L.	Spain
Celgene Sarl	France
Celgene Sàrl AU	Morocco
Celgene Sdn. Bhd.	Malaysia
Celgene Services Sarl	Switzerland
Celgene Sociedade Unipessoal Lda	Portugal
Celgene sp. zoo	Poland
Celgene Srl	Italy
Celgene sro	Czech Republic
Celgene sro	Slovakia
Celgene Summit Investment Co	New Jersey
Celgene Switzerland Holdings Sarl	Switzerland
Celgene Switzerland Investment Sarl	Switzerland

Celgene Switzerland LLC	Delaware
Celgene Switzerland SA	Switzerland
Celgene UK Distribution Limited	United Kingdom
Celgene UK Holdings, Limited	United Kingdom
Celgene UK Manufacturing II, Limited	United Kingdom
Celgene UK Manufacturing III, Limited	United Kingdom
Celgene UK Manufacturing, Limited	United Kingdom
Celgene, S. de R.l. de C.V.	Mexico
Celgro Corporation	Delaware
Celmed LLC	Delaware
Celmed Ltd.	Bermuda
Cenomed BioSciences, LLC	Delaware
CHT I LLC	Delaware
CHT II LLC	Delaware
CHT III LLC	Delaware
CHT IV LLC	Delaware
CR Finance Company LLC	Delaware
Crosp Ltd.	Bermuda
Deuteria Pharmaceuticals, Inc.	Delaware
Global Strategic Partners, LLC	Delaware
Gloucester International, LLC	Delaware
Gloucester Pharmaceuticals, LLC	Delaware
Morris Avenue Investment II, LLC	New Jersey
Morris Avenue Investment LLC	New Jersey
Pharmion LLC	Delaware
Receptos LLC	Delaware
Receptos Services LLC	Delaware
Receptos UK Limited	United Kingdom
Resuscitation Technologies, LLC	Delaware
Seamair Insurance Limited	Ireland
Signal Pharmaceuticals, LLC	California
Summit West Celgene LLC	Delaware
VivoRx Autoimmune, Inc.	California

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors

Celgene Corporation:

We consent to the incorporation by reference in the registration statements (Nos. 333-70083, 333-91977, 333-39716, 333-65908, 333-107980, 333-126296, 333-138497, 333-152655, 333-160955, 333-177669, 333-184634, 333-191996, 333-199638 and 333-207840) on Form S-8 and in the registration statements (Nos. 333-02517, 333-32115, 333-52963, 333-87197, 333-93759, 333-107977, 333-107978 and 333-191998) on Form S-3 of Celgene Corporation of our reports dated February 11, 2016, with respect to the consolidated balance sheets of Celgene Corporation and subsidiaries as of December 31, 2015 and 2014, and the related consolidated statements of income, comprehensive income, cash flows, and stockholders' equity for each of the years in the three-year period ended December 31, 2015, the related consolidated financial statement schedule, and the effectiveness of internal control over financial reporting as of December 31, 2015, which reports appear in the December 31, 2015 annual report on Form 10-K of Celgene Corporation and subsidiaries.

Our report dated February 11, 2016 on the consolidated financial statements refers to the Company’s adoption on a prospective basis of FASB Accounting Standards Update No. 2015-17, Balance Sheet Classification of Deferred Taxes which requires all deferred tax assets, liabilities and associated valuation allowances to be classified as non-current.

/s/ KPMG LLP

Short Hills, New Jersey

February 11, 2016

EX-24.1

Exhibit 24.1

POWER OF ATTORNEY

KNOW ALL MEN AND WOMEN BY THESE PRESENTS, that each person or entity whose signature appears below constitutes and appoints Robert J. Hugin its true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for it and in its name, place and stead, in any and all capacities, to sign any and all amendments to this Form 10-K and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all contents and purposes as it might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent or his substitute or substitutes may lawfully do or cause to be done by virtue thereof.

Signature	Title	Date
/s/ Richard W. Barker Richard W. Barker	Director	February 10, 2016
/s/ Michael W. Bonney Michael W. Bonney	Director	February 10, 2016
/s/ Michael D. Casey Michael D. Casey	Director	February 10, 2016
/s/ Carrie S. Cox Carrie S. Cox	Director	February 10, 2016
/s/ Michael A. Friedman Michael A. Friedman	Director	February 10, 2016
/s/ Julia A. Haller Julia A. Haller	Director	February 10, 2016
/s/ Gilla Kaplan Gilla Kaplan	Director	February 10, 2016
/s/ James Loughlin James Loughlin	Director	February 10, 2016
/s/ Ernest Mario Ernest Mario	Director	February 10, 2016

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

18 U.S.C. Sec. 1350,

AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Robert J. Hugin, certify that:

1. I have reviewed this annual report on Form 10-K of Celgene Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's Board of Directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 11, 2016

/s/ Robert J. Hugin

Robert J. Hugin

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

18 U.S.C. Sec. 1350,

AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Peter N. Kellogg, certify that:

1. I have reviewed this annual report on Form 10-K of Celgene Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;

c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's Board of Directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 11, 2016

/s/ Peter N. Kellogg

Peter N. Kellogg

Executive Vice President

Chief Financial Officer

(principal financial and accounting officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the accompanying Annual Report on Form 10-K of Celgene Corporation ("the Company") for the year ended December 31, 2015 ("the Periodic Report"), I, Robert J. Hugin, Chief Executive Officer of the Company, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge that the Periodic Report fully complies with the requirements of Section 13 (a) or 15 (d) of the Securities Exchange Act of 1934 and that the information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	February 11, 2016	/s/ Robert J. Hugin
		Robert J. Hugin   Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the accompanying Annual Report on Form 10-K of Celgene Corporation ("the Company") for the year ended December 31, 2015 ("the Periodic Report"), I, Peter N. Kellogg, Chief Financial Officer of the Company, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge that the Periodic Report fully complies with the requirements of Section 13 (a) or 15 (d) of the Securities Exchange Act of 1934 and that the information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	February 11, 2016	/s/ Peter N. Kellogg
		Peter N. Kellogg   Executive Vice President   Chief Financial Officer   (principal financial and   accounting officer)

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 05, 2016	Jun. 30, 2015
Document and Entity Information
Entity Registrant Name	CELGENE CORP /DE/
Entity Central Index Key	0000816284
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 91,555,862,650
Entity Common Stock, Shares Outstanding		781,664,535
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 4,880.3	$ 4,121.6
Marketable securities available-for-sale	1,671.6	3,425.1
Accounts receivable, net of allowances of $30.3 and $32.1 at December 31, 2015 and 2014, respectively	1,420.9	1,166.7
Inventory	443.4	393.1
Other current assets	984.7	606.1
Total current assets	9,400.9	9,712.6
Property, plant and equipment, net	814.1	642.6
Intangible assets, net	10,858.1	4,067.6
Goodwill	4,879.0	2,191.2
Other assets	1,101.3	726.1
Total assets	27,053.4	17,340.1
Current liabilities:
Short-term borrowings and current portion of long-term debt	0.0	605.9
Accounts payable	240.8	198.2
Accrued expenses	1,376.7	991.1
Income taxes payable	19.8	12.7
Current portion of deferred revenue	60.6	28.5
Other current liabilities	271.0	275.8
Total current liabilities	1,968.9	2,112.2
Deferred revenue, net of current portion	30.0	27.8
Income taxes payable	324.2	272.9
Other non-current tax liabilities	2,519.2	0.0
Other non-current liabilities	2,041.7	2,136.7
Long-term debt, net of discount	14,250.4	6,265.7
Total liabilities	$ 21,134.4	$ 10,815.3
Commitments and Contingencies (Note 18)
Stockholders' Equity:
Preferred stock, $.01 par value per share, 5.0 million shares authorized; none outstanding at December 31, 2015 and 2014, respectively	$ 0.0	$ 0.0
Common stock, $.01 par value per share, 1,150.0 million shares authorized; issued 940.1 million and 924.8 million shares at December 31, 2015 and 2014, respectively	9.4	9.2
Common stock in treasury, at cost; 153.5 million and 124.6 million shares at December 31, 2015 and 2014, respectively	(14,051.8)	(10,698.8)
Additional paid-in capital	11,119.3	9,827.2
Retained earnings	8,074.4	6,472.4
Accumulated other comprehensive income	767.7	914.8
Total stockholders' equity	5,919.0	6,524.8
Total liabilities and stockholders' equity	$ 27,053.4	$ 17,340.1

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowances (in dollars)	$ 30.3	$ 32.1
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000.0	5,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	1,150,000,000.000	1,150,000,000
Common stock, shares issued	940,100,000.0	924,800,000
Common stock, treasury	153,500,000	124,600,000

XML

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue:
Net product sales	$ 9,161.1	$ 7,563.8	$ 6,362.3
Other revenue	94.9	106.6	131.6
Total revenue	9,256.0	7,670.4	6,493.9
Expenses:
Cost of goods sold (excluding amortization of acquired intangible assets)	420.1	385.9	340.4
Research and development	3,697.3	2,430.6	2,226.2
Selling, general and administrative	2,305.4	2,027.9	1,684.5
Amortization of acquired intangible assets	279.0	258.3	262.8
Acquisition related charges and restructuring, net	299.6	48.7	171.1
Total costs and expenses	7,001.4	5,151.4	4,685.0
Operating income	2,254.6	2,519.0	1,808.9
Other income and (expense):
Interest and investment income, net	31.1	28.2	22.0
Interest (expense)	(310.6)	(176.1)	(91.6)
Other income (expense), net	48.4	(43.7)	(73.9)
Income before income taxes	2,023.5	2,327.4	1,665.4
Income tax provision	421.5	327.5	215.5
Net income	$ 1,602.0	$ 1,999.9	$ 1,449.9
Net income per share (Note 1):
Basic (in dollars per share)	$ 2.02	$ 2.49	$ 1.75
Diluted (in dollars per share)	$ 1.94	$ 2.39	$ 1.68
Weighted average shares (Note 1):
Basic (in shares)	792.2	802.7	827.7
Diluted (in shares)	824.9	836.0	860.6

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 1,602.0	$ 1,999.9	$ 1,449.9
Other comprehensive income (loss):
Foreign currency translation adjustments	(26.1)	(49.8)	27.4
Pension liability adjustment	1.6	(8.6)	3.2
Net unrealized gains (losses) related to cash flow hedges:
Unrealized holding gains (losses)	410.5	568.1	(3.2)
Tax (expense) benefit	7.2	12.3	(2.6)
Unrealized holding gains (losses), net of tax	417.7	580.4	(5.8)
Reclassification adjustment for (gains) included in net income	(348.7)	(23.1)	(7.3)
Tax (benefit)	(2.2)	(1.7)	(6.9)
Reclassification adjustment for (gains) included in net income, net of tax	(350.9)	(24.8)	(14.2)
Net unrealized gains (losses) on marketable securities available for sale:
Unrealized holding gains (losses)	(314.4)	494.0	205.1
Tax (expense) benefit	109.8	(173.9)	(77.1)
Unrealized holding gains (losses), net of tax	(204.6)	320.1	128.0
Reclassification adjustment for losses included in net income	23.4	5.4	7.3
Tax (benefit)	(8.2)	(1.9)	(2.2)
Reclassification adjustment for losses included in net income, net of tax	15.2	3.5	5.1
Total other comprehensive income (loss)	(147.1)	820.8	143.7
Comprehensive income	$ 1,454.9	$ 2,820.7	$ 1,593.6

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 1,602.0	$ 1,999.9	$ 1,449.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	114.9	104.3	96.9
Amortization	294.0	269.3	277.2
Deferred income taxes	(33.4)	(272.3)	(246.6)
Impairment charges	48.9	133.2	105.4
Change in value of contingent consideration	(7.9)	48.7	171.1
Net (gain) loss on sale of investments	(83.5)	5.4	7.0
Share-based compensation expense	576.6	447.6	325.8
Share-based employee benefit plan expense	35.1	40.7	32.6
Derivative instruments	(31.4)	(71.9)	(8.7)
Other, net	18.8	(13.5)	11.0
Change in current assets and liabilities, excluding the effect of acquisitions:
Accounts receivable	(304.7)	(166.3)	(101.4)
Inventory	(50.6)	(56.5)	(89.7)
Other operating assets	(326.2)	52.6	(90.9)
Accounts payable and other operating liabilities	533.0	252.3	287.2
Payment of contingent consideration	0.0	(14.3)	(75.0)
Income tax payable	61.2	39.1	57.4
Deferred revenue	37.1	8.0	16.7
Net cash provided by operating activities	2,483.9	2,806.3	2,225.9
Cash flows from investing activities:
Proceeds from sales of marketable securities available for sale	3,799.6	2,175.9	3,642.3
Purchases of marketable securities available for sale	(1,889.3)	(2,661.4)	(3,983.6)
Payments for acquisition of businesses, net of cash acquired	(7,695.1)	(710.0)	0.0
Capital expenditures	(286.3)	(150.3)	(119.7)
Proceeds from sales of investment securities	92.0	0.0	0.0
Purchases of investment securities	(272.5)	(67.4)	(47.1)
Other investing activities	(7.4)	(24.8)	(20.5)
Net cash used in investing activities	(6,259.0)	(1,438.0)	(528.6)
Cash flows from financing activities:
Payment for treasury shares	(3,256.8)	(2,975.1)	(2,764.6)
Proceeds from short-term borrowing	6,111.5	2,566.9	4,462.0
Principal repayments on short-term borrowing	(6,213.2)	(3,012.2)	(4,227.9)
Proceeds from the issuance of long-term debt, net of issuance costs	7,913.3	2,470.6	1,479.6
Repayments of long-term debt	(513.9)	0.0	0.0
Net (payments) proceeds from common equity put options	(8.6)	10.3	1.2
Payment of contingent consideration	0.0	(25.7)	(225.0)
Net proceeds from share-based compensation arrangements	251.7	297.2	551.6
Excess tax benefit from share-based compensation arrangements	300.5	250.6	169.4
Net cash provided by (used in) financing activities	4,584.5	(417.4)	(553.7)
Effect of currency rate changes on cash and cash equivalents	(50.7)	(63.7)	0.4
Net increase in cash and cash equivalents	758.7	887.2	1,144.0
Cash and cash equivalents at beginning of period	4,121.6	3,234.4	2,090.4
Cash and cash equivalents at end of period	4,880.3	4,121.6	3,234.4
Supplemental schedule of non-cash investing and financing activity:
Fair value of contingent consideration issued in business combinations	166.0	1,060.0	0.0
Change in net unrealized (gain) loss on marketable securities available for sale	314.4	(494.0)	(205.1)
Investment in NantBioScience, Inc. preferred equity	0.0	90.0	0.0
Supplemental disclosure of cash flow information:
Interest paid	243.3	196.2	90.8
Income taxes paid	$ 361.1	$ 294.6	$ 291.9

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balances at beginning of period at Dec. 31, 2012	$ 5,694.5	$ 8.8	$ (4,823.2)	$ 7,536.0	$ 3,022.6	$ (49.7)
Increase (decrease) in stockholders' equity
Net income	1,449.9				1,449.9
Other comprehensive income	143.7					143.7
Exercise of stock options and conversion of restricted stock units	554.0	0.2	(69.7)	623.5
Shares purchased under share repurchase program	(2,769.2)		(2,769.2)
Issuance of common stock for employee benefit plans	22.0	0.1		21.9
Expense related to share-based compensation	325.0			325.0
Income tax benefit upon exercise of stock options	170.0			170.0
Balances at end of period at Dec. 31, 2013	5,589.9	9.1	(7,662.1)	8,676.4	4,472.5	94.0
Increase (decrease) in stockholders' equity
Net income	1,999.9				1,999.9
Other comprehensive income	820.8					820.8
Exercise of stock options and conversion of restricted stock units	298.2	0.1	(126.1)	424.2
Shares purchased under share repurchase program	(2,929.5)		(2,929.5)
Issuance of common stock for employee benefit plans	45.4		18.9	26.5
Expense related to share-based compensation	447.5			447.5
Income tax benefit upon exercise of stock options	252.6			252.6
Balances at end of period at Dec. 31, 2014	6,524.8	9.2	(10,698.8)	9,827.2	6,472.4	914.8
Increase (decrease) in stockholders' equity
Net income	1,602.0				1,602.0
Other comprehensive income	(147.1)					(147.1)
Exercise of stock options and conversion of restricted stock units	259.7	0.2	(135.4)	394.9
Shares purchased under share repurchase program	(3,256.8)		(3,256.8)
Issuance of common stock for employee benefit plans	57.7		39.2	18.5
Expense related to share-based compensation	576.6			576.6
Income tax benefit upon exercise of stock options	302.1			302.1
Balances at end of period at Dec. 31, 2015	$ 5,919.0	$ 9.4	$ (14,051.8)	$ 11,119.3	$ 8,074.4	$ 767.7

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Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies

Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies

Celgene Corporation, together with its subsidiaries (collectively “we,” “our,”  “us,” “Celgene” or the “Company”), is an integrated global biopharmaceutical company engaged primarily in the discovery, development and commercialization of innovative therapies for the treatment of cancer and inflammatory diseases through next-generation solutions in protein homeostasis, immuno-oncology, epigenetics, immunology and neuro-inflammation. Celgene Corporation was incorporated in the State of Delaware in 1986.

Our primary commercial stage products include REVLIMID^®, POMALYST^®/IMNOVID^®, ABRAXANE^®,OTEZLA^®, VIDAZA^®, azacitidine for injection (generic version of VIDAZA^®),THALOMID^® (sold as THALOMID^® or Thalidomide Celgene^TM outside of the U.S.), and ISTODAX^®.In addition we earn revenue through licensing arrangements.

The consolidated financial statements include the accounts of Celgene Corporation and its subsidiaries. Investments in limited partnerships and interests where we have an equity interest of 50% or less and do not otherwise have a controlling financial interest are accounted for by either the equity or cost method.

In June 2014, our stockholders voted to approve an amendment to our Certificate of Incorporation that increased the number of shares of common stock that we are authorized to issue and effected a two-for-one stock split of outstanding shares (Stock Split). As a result, our total number of authorized shares of common stock increased from 575.0 million to 1.150 billion on June 18, 2014. Stockholders of record received one additional share of common stock for each share of common stock owned. All impacted share numbers and per share amounts presented in the consolidated financial statements and the accompanying notes to the financial statements have been restated to reflect the impact of the Stock Split. Common stock held in treasury was not adjusted for the Stock Split.

The preparation of the consolidated financial statements requires management to make estimates and assumptions that affect reported amounts and disclosures. Actual results could differ from those estimates. We are subject to certain risks and uncertainties related to, among other things, product development, regulatory approval, market acceptance, scope of patent and proprietary rights, competition, outcome of legal and governmental proceedings, European credit risk, technological change and product liability.

Certain prior year amounts have been reclassified to conform to the current year's presentation.

Financial Instruments: Certain financial instruments reflected in the Consolidated Balance Sheets, (e.g., cash, cash equivalents, accounts receivable, certain other assets, accounts payable, short-term borrowings and certain other liabilities) are recorded at cost, which approximates fair value due to their short-term nature. The fair values of financial instruments other than marketable securities are determined through a combination of management estimates and information obtained from third parties using the latest market data. The fair value of available-for-sale marketable securities is determined utilizing the valuation techniques appropriate to the type of security (See Note 4).

Derivative Instruments and Hedges: All derivative instruments are recognized on the balance sheet at their fair value. Changes in the fair value of derivative instruments are recorded each period in current earnings or other comprehensive income (loss), depending on whether a derivative instrument is designated as part of a hedging transaction and, if it is, the type of hedging transaction. For a derivative to qualify as a hedge at inception and throughout the hedged period, we formally document the nature and relationships between the hedging instruments and hedged item. We assess, both at inception and on an on-going basis, whether the derivative instruments that are used in cash flow hedging transactions are highly effective in offsetting the changes in cash flows of hedged items. We assess hedge ineffectiveness on a quarterly basis and record the gain or loss related to the ineffective portion of derivative instruments, if any, to current earnings. If we determine that a forecasted transaction is no longer probable of occurring, we discontinue hedge accounting and any related unrealized gain or loss on the derivative instrument is recognized in current earnings. We use derivative instruments, including those not designated as part of a hedging transaction, to manage our exposure to movements in foreign exchange, our stock price and interest rates. The use of these derivative instruments modifies the exposure of these risks with the intent to reduce our risk or cost.

Cash, Cash Equivalents and Marketable Securities Available for Sale: We invest our excess cash primarily in money market funds, U.S. Treasury securities, U.S. government-sponsored agency securities, U.S. government-sponsored agency mortgage-backed securities (MBS), non-U.S. government, agency and supranational securities, global corporate debt securities and asset backed securities. All liquid investments with maturities of three months or less from the date of purchase are classified as cash equivalents and all investments with maturities of greater than three months from date of purchase are classified as marketable securities available for sale. We determine the appropriate classification of our investments in marketable debt and equity securities at the time of purchase. In addition, our equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements, are designated as marketable securities available for sale.

Our marketable securities available for sale are primarily equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements. In addition, we invest in debt securities that are carried at fair value, held for an unspecified period of time and are intended for use in meeting our ongoing liquidity needs. Unrealized gains and losses on available-for-sale securities, which are deemed to be temporary, are reported as a separate component of stockholders' equity, net of tax. The cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. The amortization, along with realized gains and losses and other-than-temporary impairment charges, is included in interest and investment income, net.

A decline in the market value of any available-for-sale security below its carrying value that is determined to be other-than-temporary would result in a charge to earnings and decrease in the security's carrying value down to its newly established fair value. Factors evaluated to determine if an investment is other-than-temporarily impaired include significant deterioration in earnings performance, credit rating, asset quality or business prospects of the issuer; adverse changes in the general market condition in which the issuer operates; our intent to hold to maturity and an evaluation as to whether it is more likely than not that we will not have to sell before recovery of its cost basis; our expected future cash flows from the security; and issues that raise concerns about the issuer's ability to continue as a going concern.

Concentration of Credit Risk: Cash, cash equivalents and marketable securities are financial instruments that potentially subject the Company to concentration of credit risk. We invest our excess cash primarily in money market funds, U.S. Treasury securities, U.S. government-sponsored agency securities, MBS, non-U.S. government, agency and supranational securities, global corporate debt securities and asset backed securities (See Note 6). We have established guidelines relative to diversification and maturities to maintain safety and liquidity. These guidelines are reviewed periodically and may be modified to take advantage of trends in yields and interest rates.

We sell our products in the United States primarily through wholesale distributors and specialty contracted pharmacies. Therefore, wholesale distributors and large pharmacy chains account for a large portion of our U.S. trade receivables and net product revenues (See Note 19). International sales are primarily made directly to hospitals, clinics and retail chains, many of which in Europe are government owned and have extended their payment terms in recent years given the economic pressure these countries are facing. We continuously monitor the creditworthiness of our customers, including these governments, and have internal policies regarding customer credit limits. We estimate an allowance for doubtful accounts primarily based on the credit worthiness of our customers, historical payment patterns, aging of receivable balances and general economic conditions, including publicly available information on the credit worthiness of countries themselves and provinces or areas within such countries where they are the ultimate customers.

We continue to monitor economic conditions, including the volatility associated with international economies, the sovereign debt crisis in certain European countries and associated impacts on the financial markets and our business. Our current business model in these markets is typically to sell our products directly to principally government owned or controlled hospitals, which in turn directly deliver critical care to patients. Our products are used to treat life-threatening diseases and we believe this business model enables timely delivery and adequate supply of products. Many of the outstanding receivable balances are related to government-funded hospitals and we believe the receivable balances are ultimately collectible. Similarly, we believe that future sales to these customers will continue to be collectible.

The credit and economic conditions within Spain, Italy, Portugal and Greece, as well as increasing sales levels in those countries have in the past resulted in, and may continue to result in, an increase in the average length of time it takes to collect accounts receivable. Our total net receivables in Spain, Italy and Portugal are composed almost entirely of amounts receivable from government-owned or controlled hospitals and the public sector and amounted to $187.8 million at December 31, 2015, compared to $241.8 million at December 31, 2014. Approximately $31.3 million of the $187.8 million receivable at December 31, 2015 was greater than one year past due. Our exposure to the sovereign debt crisis in Greece is limited, as we do not have a material amount of receivables in Greece. We maintain timely and direct communication with hospital customers in Spain, Italy and Portugal regarding both the current and past due receivable balances. We continue to receive payments from these countries and closely monitor the plans for payment at the regional government level. Payments from customers in these countries are not received on regular intervals and several months could elapse between significant payments. We also regularly request and receive positive confirmation of the validity of our receivables from most of the regional governmental authorities.

In determining the appropriate allowance for doubtful accounts for Spain, Italy and Portugal, we considered the balance of past due receivables related to sales made to government-owned or supported customers. We regularly monitor developments in Europe to assess whether the level of risk of default for any customers has increased and note the ongoing efforts by the European Union, European Monetary Union and International Monetary Fund to support countries with large public deficits and outstanding debt balances. We also monitor the efforts of individual countries to support their regions with large public deficits and outstanding debt balances. We have not experienced significant losses or write-offs with respect to the collection of our accounts receivable in these countries as a result of their economic difficulties and we do not expect to have write-offs or adjustments to accounts receivable that would have a material adverse impact on our financial position or results of operations.

Inventory: Inventories are recorded at the lower of cost or market, with cost determined on a first-in, first-out basis. We periodically review the composition of inventory in order to identify obsolete, slow-moving or otherwise non-saleable items. If non-saleable items are observed and there are no alternate uses for the inventory, we will record a write-down to net realizable value in the period that the decline in value is first recognized. Included in inventory are raw materials used in the production of preclinical and clinical products, which are charged to research and development expense when consumed.

We capitalize inventory costs associated with certain products prior to regulatory approval of products, or for inventory produced in new production facilities, when management considers it highly probable that the pre-approval inventories will be saleable. The determination to capitalize is based on the particular facts and circumstances relating to the expected regulatory approval of the product or production facility being considered, and accordingly, the time frame within which the determination is made varies from product to product. The assessment of whether or not the product is considered highly probable to be saleable is made on a quarterly basis and includes, but is not limited to, how far a particular product or facility has progressed along the approval process, any known safety or efficacy concerns, potential labeling restrictions and other impediments. We could be required to write down previously capitalized costs related to pre-launch inventories upon a change in such judgment, or due to a denial or delay of approval by regulatory bodies, a delay in commercialization or other potential factors.

Property, Plant and Equipment: Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation of plant and equipment is recorded using the straight-line method. Building improvements are depreciated over the remaining useful life of the building. Leasehold improvements are depreciated over the lesser of the economic useful life of the asset or the remaining term of the lease, including anticipated renewal options. The estimated useful lives of capitalized assets are as follows:

Buildings	40 years
Building and operating equipment	15 years
Manufacturing machinery and equipment	10 years
Other machinery and equipment	5 years
Furniture and fixtures	5 years
Computer equipment and software	3-7 years

Maintenance and repairs are charged to operations as incurred, while expenditures for improvements which extend the life of an asset are capitalized.

Capitalized Software Costs: We capitalize software costs incurred in connection with developing or obtaining software. Capitalized software costs are included in property, plant and equipment, net and are amortized over their estimated useful life of three to seven years from the date the systems are ready for their intended use.

Investments in Other Entities: We hold a portfolio of investments in equity securities and certain investment funds that are accounted for under either the equity method or cost method. Investments in companies or certain investment funds over which we have significant influence but not a controlling interest are accounted for using the equity method, with our share of earnings or losses reported in other income (expense), net. Our equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements, are designated as marketable securities available for sale. Investments in equity securities of companies that become publicly traded are accounted for as available-for-sale marketable securities prospectively from the date of such companies' initial public offering if we are not restricted from selling our investment for greater than one year. Our cost method and equity method investments are included in other assets on the Consolidated Balance Sheets.

All investments are reviewed on a regular basis for possible impairment. If an investment's fair value is determined to be less than its net carrying value and the decline is determined to be other-than-temporary, the investment is written down to its fair value. Such an evaluation is judgmental and dependent on specific facts and circumstances. Factors considered in determining whether an other-than-temporary decline in value has occurred include: market value or exit price of the investment based on either market-quoted prices or future rounds of financing by the investee; length of time that the market value was below its cost basis; financial condition and business prospects of the investee; our intent and ability to retain the investment for a sufficient period of time to allow for recovery in market value of the investment; issues that raise concerns about the investee's ability to continue as a going concern; any other information that we may be aware of related to the investment.

Other Intangible Assets: Intangible assets with definite useful lives are amortized to their estimated residual values over their estimated useful lives and reviewed for impairment if certain events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Amortization is initiated for in-process research and development (IPR&D) intangible assets when their useful lives have been determined. IPR&D intangible assets which are determined to have had a drop in their fair value are adjusted downward and an expense recognized in the income statement. These IPR&D intangible assets are tested at least annually or when a triggering event occurs that could indicate a potential impairment.

Goodwill: Goodwill represents the excess of purchase price over fair value of net assets acquired in a business combination accounted for by the acquisition method of accounting and is not amortized, but is subject to impairment testing.  We test our goodwill for impairment at least annually or when a triggering event occurs that could indicate a potential impairment by assessing qualitative factors or performing a quantitative analysis in determining whether it is more likely than not that the fair value of net assets are below their carrying amounts.

Impairment of Long-Lived Assets: Long-lived assets, such as property, plant and equipment and certain other long-term assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.

Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset or asset group to the estimated undiscounted future cash flows expected to be generated by the asset or asset group. If the carrying amount of the assets exceed their estimated future undiscounted net cash flows, an impairment charge is recognized for the amount by which the carrying amount of the assets exceed the fair value of the assets.

Contingent Consideration from Business Combinations: Subsequent to the acquisition date, we measure contingent consideration arrangements at fair value for each period with changes in fair value recognized in income as acquisition related charges, net. Changes in fair values reflect new information about related IPR&D and other assets and the passage of time. In the absence of new information, changes in fair value reflect only the passage of time as development work towards the achievement of the milestones progresses, and is accrued based on an accretion schedule.

Foreign Currency Translation: Operations in non-U.S. entities are recorded in the functional currency of each entity. For financial reporting purposes, the functional currency of an entity is determined by a review of the source of an entity's most predominant cash flows. The results of operations for non-U.S. dollar functional currency entities are translated from functional currencies into U.S. dollars using the average currency rate during each month, which approximates the results that would be obtained using actual currency rates on the dates of individual transactions. Assets and liabilities are translated using currency rates at the end of the period. Adjustments resulting from translating the financial statements of our foreign entities into the U.S. dollar are excluded from the determination of net income and are recorded as a component of other comprehensive income (loss). Transaction gains and losses are recorded in other income (expense), net in the Consolidated Statements of Income. We had a net foreign exchange loss of $11.7 million in 2015, a loss of $9.5 million in 2014, and a gain of $22.2 million in 2013. These amounts include the impact of gains and losses on foreign exchange contracts not designated as hedging instruments (See Note 5).

Research and Development Costs: Research and development costs are expensed as incurred. These include all internal and external costs related to services contracted by us. Upfront and milestone payments made to third parties in connection with research and development collaborations are expensed as incurred up to the point of regulatory approval. Milestone payments made to third parties upon regulatory approval are capitalized and amortized over the remaining useful life of the related product. Upfront payments are recorded when incurred, and milestone payments are recorded when the specific milestone has been achieved.

Income Taxes: We utilize the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement carrying amounts and tax bases of assets and liabilities using enacted tax rates in effect for years in which the temporary differences are expected to reverse. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. We recognize the benefit of an uncertain tax position that we have taken or expect to take on income tax returns we file if such tax position is more likely than not to be sustained.

Revenue Recognition: Revenue from the sale of products is recognized when title and risk of loss of the product is transferred to the customer and the sales price is fixed and determinable. Provisions for discounts, early payments, rebates, sales returns and distributor chargebacks under terms customary in the industry are provided for in the same period the related sales are recorded. We record estimated reductions to revenue for volume-based discounts and rebates at the time of the initial sale. The estimated reductions to revenue for such volume-based discounts and rebates are based on the sales terms, historical experience and trend analysis.

We base our sales returns allowance on estimated on-hand retail/hospital inventories, measured end-customer demand as reported by third-party sources, actual returns history and other factors, such as the trend experience for lots where product is still being returned or inventory centralization and rationalization initiatives conducted by major pharmacy chains, as applicable.  If the historical data we use to calculate these estimates do not properly reflect future returns, then a change in the allowance would be made in the period in which such a determination is made and revenues in that period could be materially affected.  Under this methodology, we track actual returns by individual production lots.  Returns on closed lots, that is, lots no longer eligible for return credits, are analyzed to determine historical returns experience.  Returns on open lots, that is, lots still eligible for return credits, are monitored and compared with historical return trend rates.  Any changes from the historical trend rates are considered in determining the current sales return allowance. 

Sales discount accruals are based on payment terms extended to customers.

Government rebate accruals are based on estimated payments due to governmental agencies for purchases made by third parties under various governmental programs. U.S. Medicaid rebate accruals are generally based on historical payment data and estimates of future Medicaid beneficiary utilization applied to the Medicaid unit rebate formula established by the Center for Medicaid and Medicare Services. The Medicaid rebate percentage was increased and extended to Medicaid Managed Care Organizations in March 2010. The accrual of the rebates associated with Medicaid Managed Care Organizations is calculated based on estimated historical patient data related to Medicaid Managed Care Organizations. We also analyze actual billings received from the states to further support the accrual rates. Subsequent to implementation of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, the 2010 U.S. Health Care Reform Law), certain states have not completed their Medicaid Managed Care Organization billing for the years of 2010 through 2015. Our accruals for these Medicaid Managed Care Organization rebates had been at elevated levels given the delays in the receipt of complete invoices from certain states. Due to the receipt of more complete claims data during 2013, 2014 and 2015, the accruals for certain states were reduced from these elevated levels as a result of both payments being applied to the accrual during 2013, 2014 and 2015 and changes in estimate of the ultimate obligation during the fourth quarters of 2013, 2014 and 2015. We will continue to adjust the rebate accruals as more information becomes available and to reflect actual claims experience. Manufacturers of pharmaceutical products are responsible for 50% of the patient’s cost of branded prescription drugs related to the Medicare Part D Coverage Gap. In order to estimate the cost to us of this coverage gap responsibility, we analyze data for eligible Medicare Part D patients against data for eligible Medicare Part D patients treated with our products as well as the historical invoices. This expense is recognized throughout the year as costs are incurred. In certain international markets government-sponsored programs require rebates to be paid based on program specific rules and, accordingly, the rebate accruals are determined primarily on estimated eligible sales.

Rebates or administrative fees are offered to certain wholesale customers, group purchasing organizations and end-user customers, consistent with pharmaceutical industry practices. Settlement of rebates and fees may generally occur from one to 15 months from the date of sale. We record a provision for rebates at the time of sale based on contracted rates and historical redemption rates. Assumptions used to establish the provision include level of wholesaler inventories, contract sales volumes and average contract pricing. We regularly review the information related to these estimates and adjust the provision accordingly.

Chargeback accruals are based on the differentials between product acquisition prices paid by wholesalers and lower government contract pricing paid by eligible customers covered under federally qualified programs. Distributor service fee accruals are based on contractual fees to be paid to the wholesale distributor for services provided. TRICARE is a health care program of the U.S. Department of Defense Military Health System that provides civilian health benefits for military personnel, military retirees and their dependents. TRICARE rebate accruals are included in chargeback accruals and are based on estimated Department of Defense eligible sales multiplied by the TRICARE rebate formula.

We record estimated reductions to revenue for free goods and volume-based discounts at the time of the initial sale. The estimated reductions to revenue for such free goods and volume-based discounts are based on the sales terms, historical experience and trend analysis. The cost of free goods is included in cost of goods sold (excluding amortization of acquired intangible assets).

We recognize revenue from royalties based on licensees' sales of our products or products using our technologies. Royalties are recognized as earned in accordance with the contract terms when royalties from licensees can be reasonably estimated and collectability is reasonably assured. If royalties cannot be reasonably estimated or collectability of a royalty amount is not reasonably assured, royalties are recognized as revenue when the cash is received.

Share-Based Compensation: We utilize share based compensation in the form of stock options, restricted stock units (RSUs) and performance-based restricted stock units (PSUs). Compensation expense is recognized in the Consolidated Statements of Income based on the estimated fair value of the awards at grant date. Compensation expense recognized reflects an estimate of the number of awards expected to vest after taking into consideration an estimate of award forfeitures based on actual experience and is recognized on a straight-line basis over the requisite service period, which is generally the vesting period required to obtain full vesting. Management expectations related to the achievement of performance goals associated with PSU grants is assessed regularly and that assessment is used to determine whether PSU grants are expected to vest. If performance-based milestones related to PSU grants are not met or not expected to be met, any compensation expense recognized to date associated with grants that are not expected to vest will be reversed.

The fair values of stock option grants are estimated as of the date of grant using a Black-Scholes option valuation model. The fair values of RSU and PSU grants that are not based on market performance are based on the market value of our Common Stock on the date of grant. Certain of our PSU grants are measured based on the achievement of specified performance and market targets, including non-GAAP revenue, non-GAAP earnings per share, and relative total shareholder return. The grant date fair value for the portion of the PSUs related to non-GAAP revenue and non-GAAP earnings per share is estimated using the fair market value of our common stock on the grant date. The grant date fair value for the portion of the PSUs related to relative total shareholder return is estimated using the Monte Carlo valuation model.

Earnings Per Share: Basic earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period, assuming potentially dilutive common shares resulting from option exercises, RSUs, PSUs, warrants and other incentives had been issued and any proceeds thereof used to repurchase common stock at the average market price during the period. The assumed proceeds used to repurchase common stock is the sum of the amount to be paid to us upon exercise of options, the amount of compensation cost attributed to future services and not yet recognized and, if applicable, the amount of excess income tax benefit that would be credited to paid-in capital upon exercise.

New Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (ASU 2014-09). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under U.S. GAAP and requires revenue to be recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. Additionally, qualitative and quantitative disclosures are required about customer contracts, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. This accounting guidance is effective for us beginning in the first quarter of 2018 using one of two prescribed transition methods. We are currently evaluating the effect that the updated standard and transition method will have on our consolidated financial statements and related disclosures.

In April 2015, the FASB issued Accounting Standards Update No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs" (ASU 2015-03). ASU 2015-03 will more closely align the presentation of debt issuance costs under U.S. GAAP with the presentation under comparable IFRS standards by requiring that debt issuance costs be presented on the balance sheet as a direct deduction from the carrying amount of the related debt liability, similar to the presentation of debt discounts or premiums. This accounting guidance is effective for us beginning in the first quarter of 2016. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In April 2015, the FASB issued Accounting Standards Update No. 2015-05, "Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement" (ASU 2015-05). ASU 2015-05 provides guidance to help companies evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The new guidance clarifies that if a cloud computing arrangement includes a software license, the customer should account for the license consistent with its accounting for other software licenses. If the arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 is effective for us beginning in the first quarter of 2016. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In July 2015, the FASB issued Accounting Standards Update No. 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory" (ASU 2015-11). ASU 2015-11 applies only to inventory for which cost is determined by methods other than last-in, first-out and the retail inventory method, which includes inventory that is measured using first-in, first-out or average cost. Inventory within the scope of this standard is required to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The new standard will be effective for us on January 1, 2017. We are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures.

In August 2015, the FASB issued Accounting Standards Update No. 2015-15, "Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements" (ASU 2015-15). ASU 2015-15 clarifies the presentation and subsequent measurement of debt issuance costs associated with lines of credit. These costs may be presented as an asset and amortized ratably over the term of the line of credit arrangement, regardless of whether there are outstanding borrowings on the arrangement. The effective date will be the first quarter of fiscal year 2017 and will be applied retrospectively. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In September 2015, the FASB issued Accounting Standards Update No. 2015-16, "Simplifying the Accounting for Measurement-Period Adjustments" (ASU 2015-16). ASU 2015-16 replaces the requirement that an acquirer in a business combination account for measurement period adjustments retrospectively with a requirement that an acquirer recognize adjustments to the provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. ASU 2015-16 will be effective for us beginning in the first quarter of 2016. The guidance is to be applied prospectively to adjustments to provisional amounts that occur after the effective date of the guidance, with earlier application permitted for financial statements that have not been issued. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In November 2015, the FASB issued Accounting Standards Update No. 2015-17, "Balance Sheet Classification of Deferred Taxes" (ASU 2015-17). ASU 2015-17 requires companies to classify all deferred tax assets and liabilities and associated valuation allowances as non-current on the balance sheet instead of separating deferred taxes and associated valuation allowances into current and non-current amounts. The update may be adopted on either a prospective or retrospective basis with early adoption permitted. In order to simplify the presentation of deferred income taxes, we have chosen to adopt ASU 2015-17 in the fourth quarter of 2015 on a prospective basis. Prior periods were not retrospectively adjusted.

In January 2016, the FASB issued Accounting Standards Update 2016-01, "Financial Instruments–Overall: Recognition and Measurement of Financial Assets and Financial Liabilities" (ASU 2016-01). ASU 2016-01 changes accounting for equity investments, financial liabilities under the fair value option, and presentation and disclosure requirements for financial instruments. ASU 2016-01 does not apply to equity investments in consolidated subsidiaries or those accounted for under the equity method of accounting. In addition, the FASB clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. Equity investments with readily determinable fair values will be measured at fair value with changes in fair value recognized in net income. Companies have the option to either measure equity investments without readily determinable fair values at fair value or at cost adjusted for changes in observable prices minus impairment. Changes in measurement under either alternative will be recognized in net income. Companies that elect the fair value option for financial liabilities must recognize changes in fair value related to instrument-specific credit risk in other comprehensive income. Companies must assess valuation allowances for deferred tax assets related to available-for-sale debt securities in combination with their other deferred tax assets. ASU 2016-01 will be effective for us beginning in the first quarter of 2018 and early adoption is available to publicly traded companies for the provision to record fair value changes for financial liabilities under the fair value option resulting from instrument-specific credit risk in other comprehensive income. We expect the implementation of this standard to have an impact on our consolidated financial statements and related disclosures, as we held publicly traded equity investments at December 31, 2015 with a fair value of $1.236 billion, as well as equity investments accounted for under the cost method. A cumulative-effect adjustment to the balance sheet will be recorded as of the beginning of the fiscal year of adoption. The implementation of ASU 2016-01 is expected to increase volatility in our net income as the volatility currently recorded in other comprehensive income related to changes in the fair market value of available for sale equity investments will be reflected in net income after adoption.

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Acquisitions

12 Months Ended

Dec. 31, 2015

Business Combinations [Abstract]

Acquisitions

Acquisitions

Receptos, Inc. (Receptos): On August 27, 2015 (Acquisition Date), we acquired all of the outstanding common stock of Receptos, resulting in Receptos becoming our wholly-owned subsidiary. Receptos' lead drug candidate, ozanimod, is a small molecule that modulates sphingosine 1-phosphate 1 and 5 receptors and it is in development for immune-inflammatory indications, including inflammatory bowel disease and relapsing multiple sclerosis (RMS). In clinical trial results, ozanimod demonstrated several areas of potential advantage over existing oral therapies for the treatment of ulcerative colitis (UC) and RMS, including its cardiac, hepatotoxicity and lymphocyte recovery profile. The phase III TRUE NORTH trial in UC is currently underway with data expected in 2018. The phase III RADIANCE and SUNBEAM RMS trials are ongoing and data are expected in the first half of 2017. The acquisition of Receptos also included RPC4046, an anti-interleukin-13 (IL-13) antibody in development for eosinophilic esophagitis (EoE), an allergic/immune-mediated orphan disease. RPC4046 was licensed from AbbVie Bahamas Ltd. and AbbVie Inc. (collectively referred to as AbbVie) and is currently in phase II testing for EoE. The results of operations for Receptos are included in our consolidated financial statements from the Acquisition Date and the assets and liabilities of Receptos have been recorded at their respective fair values on the Acquisition Date and consolidated with our assets and liabilities.

We paid approximately $7.626 billion, consisting of $7.311 billion for common stock outstanding and $0.315 billion for the portion of equity compensation attributable to the pre-combination period. In addition, we paid $0.197 billion for the portion of equity compensation attributable to the post-combination service period, which has been recorded as expense over the required service period ending in the fourth quarter of 2015.

The acquisition has been accounted for using the acquisition method of accounting which requires that assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date and requires the fair value of acquired IPR&D to be classified as indefinite-lived assets until the successful completion or abandonment of the associated research and development efforts. A preliminary purchase price allocation has been performed and the recorded amounts for intangible assets, goodwill and associated deferred tax assets and liabilities are subject to change pending finalization of valuation efforts.

The amounts recognized will be finalized as the information necessary to complete the analysis is obtained, but no later than one year after the acquisition date.

The total cash consideration for the acquisition of Receptos is summarized as follows:

	Total Consideration
Cash paid for outstanding common stock	$	7,311.3
Cash for equity compensation attributable to pre-combination service	314.9
Total consideration	$	7,626.2

The preliminary purchase price allocation resulted in the following amounts being allocated to the assets acquired and liabilities assumed at the acquisition date based upon their respective preliminary fair values summarized below. During the fourth quarter of 2015, adjustments have been recorded to increase the amounts initially recorded for deferred tax assets, deferred tax liabilities and goodwill as of the Acquisition Date. The amounts recognized will be finalized as the information necessary to complete the analyses is obtained, but no later than one year from the Acquisition Date.

	Amounts Recognized as of the Acquisition Date (Provisional)
Working capital (1)	$	479.2
Property, plant and equipment	5.0
In-process research and development product rights	6,842.0
Current deferred tax assets	241.3
Other non-current assets	7.9
Non-current deferred tax liabilities(2)	(2,519.2		)
Total identifiable net assets	5,056.2
Goodwill	2,570.0
Total net assets acquired	$	7,626.2

⁽¹⁾  Includes cash and cash equivalents, available-for-sale marketable securities, other current assets, accounts payable and other current liabilities.

⁽²⁾ Upon integration of the acquired intangible assets into our offshore research, manufacturing, and commercial operations, the deferred tax liability was reclassified to a non-current tax liability. (See Note 16)

The fair values of current assets, current liabilities and property, plant and equipment were determined to approximate their book values.

The fair value assigned to acquired IPR&D was based on the present value of expected after-tax cash flows attributable to ozanimod, which is in phase II and III testing. The present value of expected after-tax cash flows attributable to ozanimod and assigned to IPR&D was determined by estimating the after-tax costs to complete development of ozanimod into a commercially viable product, estimating future revenue and ongoing expenses to produce, support and sell ozanimod, on an after-tax basis, and discounting the resulting net cash flows to present value. The revenue and costs projections used were reduced based on the probability that compounds at similar stages of development will become commercially viable products. The rate utilized to discount the net cash flows to their present value reflects the risk associated with the intangible asset and is benchmarked to the cost of equity. Acquired IPR&D will be accounted for as an indefinite-lived intangible asset until regulatory approval in a major market or discontinuation of development.

The excess of purchase price over the fair value amounts assigned to identifiable assets acquired and liabilities assumed represents the goodwill amount resulting from the acquisition. The goodwill recorded as part of the acquisition is primarily attributable to the broadening of our product portfolio and research capabilities in the inflammation and immunology therapeutic area, the assembled workforce and the deferred tax consequences of the IPR&D asset recorded for financial statement purposes. We do not expect any portion of this goodwill to be deductible for tax purposes. The goodwill attributable to the acquisition has been recorded as a non-current asset in our Consolidated Balance Sheets and is not amortized, but is subject to review for impairment annually.

As a result of the exclusive development license from AbbVie for RPC4046 that Receptos held prior to our acquisition of Receptos, AbbVie holds an option to enter into a global collaboration for RPC4046 with us following the availability of results from the current phase II study. If AbbVie does not exercise its option, we will have an exclusive worldwide license for the development and commercialization of RPC4046 that will be unlimited as to indications. We do not consider this potential collaboration arrangement to be significant.

From the Acquisition Date through December 31, 2015, our Consolidated Statements of Income included expenses of $380.5 million associated with the acquisition and operations of Receptos as follows⁽¹⁾:

Statements of Income Location	Acquisition Date Through December 31, 2015
Research and development	$	78.6
Selling, general and administrative	5.1
Acquisition related charges and restructuring, net (2)	296.8
Total	$	380.5

⁽¹⁾ In addition, Celgene incurred $19.9 million of acquisition related costs prior to the acquisition date.

⁽²⁾ Consists of acquisition-related compensation expense and transaction costs.

Pro Forma Financial Information:

The following table provides unaudited pro forma financial information for the twelve-month periods ended December 31, 2015 and 2014 as if the acquisition of Receptos had occurred on January 1, 2014.

	Twelve-Month Periods Ended December 31,
	2015		2014
Total revenue	$	9,256.0	$	7,676.3
Net income	$	1,630.8	$	1,499.9
Net income per common share: basic	$	2.06	$	1.87
Net income per common share: diluted	$	1.98	$	1.79

The unaudited pro forma financial information was prepared using the acquisition method of accounting and was based on the historical financial information of Celgene and Receptos. The pro-forma financial information assumes that the acquisition-related transaction fees and costs incurred were removed from the twelve-month period ended December 31, 2015 and were assumed to have been incurred during the first quarter of 2014. The unaudited pro forma results do not reflect any operating efficiencies or potential cost savings that may result from the combined operations of Celgene and Receptos. Accordingly, these unaudited pro forma results are presented for illustrative purposes and are not intended to represent or be indicative of the actual results of operations of the combined company that would have been achieved had the acquisition occurred at the beginning of the period presented, nor are they intended to represent or be indicative of future results of operations.

Quanticel Pharmaceuticals, Inc. (Quanticel): On October 19, 2015, we completed our previously announced acquisition of Quanticel, a privately held biotechnology company focused on cancer drug discovery, for consideration consisting of $95.9 million in cash at closing plus contingent consideration consisting of future payments of up to $385.0 million for achieving specified discovery and development targets. We have had a research collaboration arrangement with Quanticel since 2011. Through this purchase, Quanticel has become our wholly-owned subsidiary, and we will benefit from full access to Quanticel’s proprietary platform for the single-cell genomic analysis of human cancer, as well as Quanticel’s programs that target specific epigenetic modifiers, which we expect will advance our pipeline of innovative cancer therapies.

The acquisition was accounted for using the acquisition method of accounting for business combinations which requires the assets and liabilities of Quanticel to be recorded at their respective fair values on the acquisition date and consolidated into our Consolidated Balance Sheets. The results of operations for Quanticel have been included in our consolidated financial statements from the date of acquisition.

The fair value of consideration transferred in the acquisition of Quanticel is shown in the table below:

	Fair Value at the Acquisition Date
Cash	$	95.9
Fair value of pre-existing equity ownership	11.4
Contingent consideration	166.0
Total fair value of consideration	$	273.3

Prior to the acquisition of Quanticel, we had an equity interest equal to approximately 5% of the company’s total capital stock (on an “as converted” basis). Based on the fair market value of this interest derived from the purchase price, we recognized a gain of $10.3 million, which is reflected as a component of other income (expense), net within our Consolidated Statement of Income for the year ended December 31, 2015.

Our potential contingent consideration payments are classified as liabilities, which were measured at fair value as of the acquisition date, with $82.3 million classified as current liabilities and $83.7 million classified as non-current liabilities. We estimated the fair value of potential contingent consideration using a probability-weighted discounted cash flow approach, which reflects the probability and timing of future potential payments. This fair value measurement is based on significant inputs that are not observable in the market and thus represents a level three liability within the fair value hierarchy. The resulting probability-weighted cash flows were discounted using a discount rate based on a market participant assumption. See Note 4 for post-acquisition changes in fair value. The preliminary purchase price allocation resulted in the following amounts being allocated to the assets acquired and liabilities assumed at the acquisition date based upon their respective preliminary fair values summarized below. The amounts recognized will be finalized as the information necessary to complete the analyses is obtained, but no later than one year from the acquisition date.

	Fair Value at October 19, 2015 (Provisional)
Working capital (1)	$	7.0
Property, plant and equipment	1.9
Other non-current assets	0.8
Technology platform intangible asset(2)	232.0
Debt obligations	(13.9		)
Non-current deferred tax liabilities	(72.3		)
Total identifiable net assets	155.5
Goodwill	117.8
Total net assets acquired	$	273.3

⁽¹⁾  Includes cash and cash equivalents, available-for-sale marketable securities, other current assets, accounts payable and other current liabilities.

⁽²⁾ Technology platform related to Quanticel’s proprietary technology platform for the single-cell genomic analysis of human cancer.

The fair values of current and other non-current assets, property, plant and equipment, current liabilities and debt were determined to approximate their book values.

The fair value of the technology platform intangible asset is equal to the present value of the after-tax cash flows attributable to the intangible asset, which was calculated based on the multi-period excess earnings method of the income approach. The multi-period excess earnings method of the income approach included estimating probability adjusted annual after-tax net cash flows through the cycle of development and commercialization of potential products generated by the technology platform then discounting the resulting probability adjusted net post-tax cash flows using a discount rate commensurate with the risk of our overall business operations to arrive at the net present value.

The excess of purchase price over the fair value amounts assigned to the identifiable assets acquired and liabilities assumed represents the goodwill amount resulting from the acquisition. The goodwill recorded as part of the acquisition is largely attributable to the deferred tax consequences of the finite-lived technology platform intangible asset recorded for financial statement purposes, as well as intangible assets that do not qualify for separate recognition at the time of the acquisition. We do not expect any portion of this goodwill to be deductible for tax purposes. Goodwill attributable to the acquisition has been recorded as a non-current asset in our Consolidated Balance Sheets and is not amortized, but is subject to review for impairment annually.

The results of operations and cash flows from Quanticel are included in our consolidated financial statements as of October 19, 2015. Pro forma supplemental financial information is not provided as the impact of the Quanticel acquisition was not material to our results of operations in 2015.

Nogra Pharma Limited (Nogra): On April 23, 2014, we entered into a license agreement with Nogra, pursuant to which Nogra granted us an exclusive, royalty-bearing license for its intellectual property relating to GED-0301, an antisense oligonucleotide targeting Smad7, to develop and commercialize products containing GED-0301 for the treatment of Crohn’s disease and other indications. A phase II trial of GED-0301 in patients with active Crohn's disease has been completed and we have initiated a multi-trial clinical program that is designed to support global registrations of GED-0301 in Crohn's disease.

Under the terms of the agreement, which became effective on May 14, 2014 after receipt of certain governmental clearances and approvals, we made an upfront payment of $710.0 million and may make additional contingent developmental, regulatory and sales milestone payments as well as payments based on percentages of annual sales of licensed products. The maximum aggregate amount payable for development and regulatory milestones is approximately $815.0 million, which covers such milestones relating to Crohn’s disease and other indications. Starting from global annual net sales of $500.0 million, aggregate tiered sales milestone payments could total a maximum of $1.050 billion if global annual net sales reach $4.000 billion.

The development and application of the intellectual property covered under the license agreement will be managed by joint committees composed of members from each of Nogra and us. We have the tie-breaking vote on the joint steering committee and as such have ultimate decision-making authority for development, regulatory and commercialization decisions. The agreement also includes provisions for access to employees of Nogra, technical assistance, transfer of manufacturing agreements and transfer of Nogra know-how related to GED-0301. Based on the foregoing factors, for accounting purposes, we have concluded that the acquired assets meet the definition of a business and have accounted for the GED-0301 license as IPR&D acquired in a business combination. The acquisition method of accounting requires that (a) the assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date and (b) the fair value of IPR&D be classified as an indefinite-lived asset until the successful completion or abandonment of the associated research and development efforts. Pro-forma results of operations for this acquisition have not been presented because this acquisition is not material to our consolidated results of operations.

The fair value of consideration transferred to acquire the license amounted to:

	Fair Value at the Acquisition Date
Cash	$	710.0
Contingent consideration	1,060.0
Total fair value of consideration	$	1,770.0

Our potential contingent consideration payments are classified as liabilities, which were measured at fair value as of the acquisition date, with $5.0 million classified as current liabilities and $1.055 billion classified as non-current liabilities. We estimated the fair value of potential contingent consideration using a probability-weighted income approach, which reflects the probability and timing of future potential payments. This fair value measurement is based on significant inputs that are not observable in the market and thus represents a level three liability within the fair value hierarchy. The resulting probability-weighted cash flows were discounted using a discount rate based on a market participant assumption. See Note 4 for post-acquisition changes in fair value. The purchase price allocation resulted in the following amounts being allocated to the assets acquired at the acquisition date based on their respective fair values:

	Fair Value at the Acquisition Date
In-process research and development product rights	$	1,620.0
Current deferred tax assets	1.3
Non-current deferred tax liabilities, net	(1.3		)
Total identifiable net assets	1,620.0
Goodwill	150.0
Total net assets acquired	$	1,770.0

The fair value of the acquired IPR&D asset was based on the present value of expected net cash flows from the GED-0301 product candidate. Net cash flows were determined by estimating future sales, net of the costs to complete development of GED-0301 into a commercially viable product. Estimated net cash flows were adjusted to reflect the probability of successfully developing a new drug from a product candidate that has completed a phase II trial. Additionally, the projections considered the relevant market sizes and growth factors and the nature and expected timing of a new product introduction. The resulting net cash flows from such potential products include our estimates of cost of sales, operating expenses, and income taxes. The rates utilized to discount the net cash flows to their present value were commensurate with the stage of development of the project and uncertainties in the economic estimates used in the projections described above. The acquired IPR&D asset is accounted for as an indefinite-lived intangible asset until regulatory approval in a major market or discontinuation.

The excess of purchase price over the fair value amounts assigned to the assets acquired represents the goodwill amount resulting from the acquisition. The goodwill recorded as part of the acquisition is largely attributable to intangible assets that do not qualify for separate recognition. We expect this goodwill to be deductible for tax purposes.

The license agreement may be terminated (i) at our discretion upon 180 days’ written notice to Nogra, provided that such termination will not become effective before May 14, 2017, and (ii) by either party upon material breach of the other party, subject to cure periods. Upon the expiration of our royalty payment obligations under the license agreement, on a country-by-country and licensed product-by-licensed product basis, the license granted under the license agreement will become fully paid-up, irrevocable, perpetual, and non-terminable with respect to such licensed product in such country.

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Earnings Per Share

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

	2015		2014		2013
Net income	$	1,602.0	$	1,999.9	$	1,449.9
Weighted-average shares:
Basic	792.2		802.7		827.7
Effect of dilutive securities:
Options, RSUs, PSUs, warrants and other	32.7		33.3		32.9
Diluted	824.9		836.0		860.6
Net income per share:
Basic	$	2.02	$	2.49	$	1.75
Diluted	$	1.94	$	2.39	$	1.68

The total number of potential shares of common stock excluded from the diluted earnings per share computation because their inclusion would have been anti-dilutive was 14.1 million in 2015, 18.7 million in 2014 and 14.3 million in 2013.

During the period of April 2009 through December 2015, our Board of Directors approved repurchases of up to an aggregate of $17.500 billion of our common stock, including the authorization in June 2015 to repurchase an additional $4.000 billion of our common stock.

As part of the management of our share repurchase program, we may, from time to time, sell put options on our common stock with strike prices that we believe represent an attractive price to purchase our shares. If the trading price of our shares exceeds the strike price of the put option at the time the option expires, we will have economically reduced the cost of our share repurchase program by the amount of the premium we received from the sale of the put option. If the trading price of our stock is below the strike price of the put option at the time the option expires, we would purchase the shares covered by the option at the strike price of the put option. During 2015 and 2014, we recorded net losses of $9.9 million and net gains of $11.6 million, respectively, from selling put options on our common stock. At December 31, 2015, we had no outstanding put options.

We repurchased 28.1 million shares of common stock under the program from all sources during 2015 at a total cost of $3.257 billion. As of December 31, 2015, we had a remaining open-ended repurchase authorization of $3.890 billion.

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Financial Instruments and Fair Value Measurement

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Financial Instruments and Fair Value Measurement

Financial Instruments and Fair Value Measurement

The table below presents information about assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2015 and 2014, and the valuation techniques we utilized to determine such fair value. 

• Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities. Our Level 1 assets consist of marketable equity securities. Our Level 1 liability relates to our publicly traded Contingent Value Rights (CVRs). See Note 18 for a description of the CVRs. 

• Level 2 inputs utilize observable quoted prices for similar assets and liabilities in active markets and observable quoted prices for identical or similar assets in markets that are not very active. Our Level 2 assets consist primarily of U.S. Treasury securities, U.S. government-sponsored agency securities, U.S. government-sponsored agency MBS, non-U.S. government, agency and supranational securities, global corporate debt securities, asset backed securities, foreign currency forward contracts, purchased foreign currency options and interest rate swap contracts. Our Level 2 liabilities relate to written foreign currency options, foreign currency forward contracts and interest rate swap contracts.

• Level 3 inputs utilize unobservable inputs and include valuations of assets or liabilities for which there is little, if any, market activity. We do not have any Level 3 assets. Our Level 3 liabilities consist of contingent consideration related to undeveloped product rights resulting from the acquisitions of Gloucester Pharmaceuticals, Inc. (Gloucester) and Nogra in addition to contingent consideration related to the undeveloped product rights and technology platforms acquired as part of the acquisitions of Avila Therapeutics, Inc. (Avila) and Quanticel. The maximum remaining potential payments related to the contingent consideration from the acquisitions of Gloucester, Avila and Quanticel are estimated to be $120.0 million, $555.0 million and $385.0 million, respectively, and $1.865 billion plus amounts based on sales pursuant to the license agreement with Nogra.

	Balance at December 31, 2015			Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	$	1,671.6		$	1,235.9		$	435.7		$	—
Forward currency contracts	606.0			—			606.0			—
Purchased currency options	46.7			—			46.7			—
Interest rate swaps	52.5			—			52.5			—
Total assets	$	2,376.8		$	1,235.9		$	1,140.9		$	—
Liabilities:
Contingent value rights	$	(51.9	)	$	(51.9	)	$	—		$	—
Written currency options	(19.1		)	—			(19.1		)	—
Other acquisition related contingent consideration	(1,521.5		)	—			—			(1,521.5		)
Total liabilities	$	(1,592.5	)	$	(51.9	)	$	(19.1	)	$	(1,521.5	)

	Balance at December 31, 2014			Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	$	3,425.1		$	1,051.3		$	2,373.8		$	—
Forward currency contracts	550.7			—			550.7			—
Purchased currency options	9.8			—			9.8			—
Interest rate swaps	20.0			—			20.0			—
Total assets	$	4,005.6		$	1,051.3		$	2,954.3		$	—
Liabilities:
Contingent value rights	$	(136.3	)	$	(136.3	)	$	—		$	—
Written currency options	(4.6		)	—			(4.6		)	—
Other acquisition related contingent consideration	(1,279.0		)	—			—			(1,279.0		)
Total liabilities	$	(1,419.9	)	$	(136.3	)	$	(4.6	)	$	(1,279.0	)

There were no security transfers between Levels 1 and 2 during years ended December 31, 2015 and 2014. The following table represents a roll-forward of the fair value of Level 3 instruments:

	2015			2014
Liabilities:
Balance at beginning of period	$	(1,279.0	)	$	(228.5	)
Amounts acquired or issued	(166.0		)	(1,060.0		)
Net change in fair value	(76.5		)	(30.5		)
Settlements	—			40.0
Transfers in and/or out of Level 3	—			—
Balance at end of period	$	(1,521.5	)	$	(1,279.0	)

Level 3 liabilities outstanding as of December 31, 2015 primarily consisted of contingent consideration related to the acquisitions of Avila, Gloucester, Nogra and Quanticel. Level 3 liabilities outstanding increased by $242.5 million in 2015 compared to 2014. Amounts acquired or issued in 2015 represent $166.0 million from the October 2015 acquisition of Quanticel. The $76.5 million net increase in the fair value of Level 3 liabilities in 2015 was related to accretion of the fair value of our contingent consideration due to the passage of time, which was partly offset by reductions in the probability and delays in the assumed timing of certain contingent consideration milestones related to the acquisition of Avila. Changes to the fair value of contingent consideration are recorded on the Consolidated Statements of Income as acquisition related charges and restructuring, net.

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Derivative Instruments and Hedging Activities

12 Months Ended

Dec. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

Derivative Instruments and Hedging Activities

Our revenue and earnings, cash flows and fair values of assets and liabilities can be impacted by fluctuations in foreign exchange rates and interest rates. We actively manage the impact of foreign exchange rate and interest rate movements through operational means and through the use of various financial instruments, including derivative instruments such as foreign currency option contracts, foreign currency forward contracts, treasury rate lock agreements and interest rate swap contracts. In instances where these financial instruments are accounted for as cash flow hedges or fair value hedges, we may from time to time terminate the hedging relationship. If a hedging relationship is terminated we generally either settle the instrument or enter into an offsetting instrument.

Foreign Currency Risk Management

We maintain a foreign exchange exposure management program to mitigate the impact of volatility in foreign exchange rates on future foreign currency cash flows, translation of foreign earnings and changes in the fair value of assets and liabilities denominated in foreign currencies.

Through our revenue hedging program, we endeavor to reduce the impact of possible unfavorable changes in foreign exchange rates on our future U.S. dollar cash flows that are derived from foreign currency denominated sales. To achieve this objective, we hedge a portion of our forecasted foreign currency denominated sales that are expected to occur in the foreseeable future, typically within the next three years. We manage our anticipated transaction exposure principally with foreign currency forward contracts and occasionally foreign currency put and call options.

Foreign Currency Forward Contracts: We use foreign currency forward contracts to hedge specific forecasted transactions denominated in foreign currencies, manage exchange rate volatility in the translation of foreign earnings, and reduce exposures to foreign currency fluctuations of certain assets and liabilities denominated in foreign currencies.

We manage a portfolio of foreign currency forward contracts to protect against changes in anticipated foreign currency cash flows resulting from changes in foreign currency exchange rates, primarily associated with non-functional currency denominated revenues and expenses of foreign subsidiaries. The foreign currency forward hedging contracts outstanding at December 31, 2015 and December 31, 2014 had settlement dates within 36 months. The spot rate components of these foreign currency forward contracts are designated as cash flow hedges and, to the extent effective, any unrealized gains or losses are reported in other comprehensive income (OCI) and reclassified to operations in the same periods during which the underlying hedged transactions affect earnings. If a hedging relationship is terminated with respect to a foreign currency forward contract, accumulated gains or losses associated with the contract remain in OCI until the hedged forecasted transaction occurs and are reclassified to operations in the same periods during which the underlying hedged transactions affect earnings. Any ineffectiveness on these foreign currency forward contracts is reported on the Consolidated Statements of Income in other income (expense), net. The forward point components of these foreign currency forward contracts are not designated as cash flow hedges and all fair value adjustments of forward point amounts are recorded to other income (expense), net. Foreign currency forward contracts entered into to hedge forecasted revenue and expenses were as follows at December 31, 2015 and December 31, 2014:

	Notional Amount
Foreign Currency:	2015		2014
Australian Dollar	$	45.1	$	18.8
British Pound	289.3		304.8
Canadian Dollar	135.9		43.7
Euro	2,934.3		3,375.7
Japanese Yen	510.4		541.1
Total	$	3,915.0	$	4,284.1

We consider the impact of our own and the counterparties’ credit risk on the fair value of the contracts as well as the ability of each party to execute its obligations under the contract on an ongoing basis. As of December 31, 2015, credit risk did not materially change the fair value of our foreign currency forward contracts.

We also manage a portfolio of foreign currency contracts to reduce exposures to foreign currency fluctuations of certain recognized assets and liabilities denominated in foreign currencies and, from time to time, we enter into foreign currency contracts to manage exposure related to translation of foreign earnings. These foreign currency forward contracts have not been designated as hedges and, accordingly, any changes in their fair value are recognized on the Consolidated Statements of Income in other income (expense), net in the current period. The aggregate notional amount of the foreign currency forward non-designated hedging contracts outstanding at December 31, 2015 and December 31, 2014 were $920.0 million and $835.5 million, respectively.

Foreign Currency Option Contracts: From time to time, we may hedge a portion of our future foreign currency exposure by utilizing a strategy that involves both a purchased local currency put option and a written local currency call option that are accounted for as hedges of future sales denominated in that local currency. Specifically, we sell (or write) a local currency call option and purchase a local currency put option with the same expiration dates and local currency notional amounts but with different strike prices. This combination of transactions is generally referred to as a “collar.” The expiration dates and notional amounts correspond to the amount and timing of forecasted foreign currency sales. If the U.S. dollar weakens relative to the currency of the hedged anticipated sales, the purchased put option value reduces to zero and we benefit from the increase in the U.S. dollar equivalent value of our anticipated foreign currency cash flows; however, this benefit would be capped at the strike level of the written call, which forms the upper end of the collar. The premium collected from the sale of the call option is equal to the premium paid for the purchased put option, resulting in a net zero cost for each collar. Outstanding foreign currency option contracts entered into to hedge forecasted revenue were as follows at December 31, 2015 and 2014:

	Notional Amount1
	2015		2014
Foreign currency option contracts designated as hedging activity:
Purchased Put	$	641.5	$	152.6
Written Call	$	690.0	$	160.9

¹ U.S. dollar notional amounts are calculated as the hedged local currency amount multiplied by the strike value of the foreign currency option. The local currency notional amounts of our purchased put and written call that are designated as hedging activities are equal to each other.

Interest Rate Risk Management

In anticipation of issuing fixed-rate debt, we may use forward starting interest rate swaps (forward starting swaps) or treasury rate lock agreements (treasury rate locks) that are designated as cash flow hedges to hedge against changes in interest rates that could impact expected future issuances of debt. To the extent these hedges of cash flows related to anticipated debt are effective, any realized or unrealized gains or losses on the treasury rate locks or forward starting swaps are reported in OCI and are recognized in income over the life of the anticipated fixed-rate notes.

Forward Starting Interest Rate Swaps and Treasury Rate Locks: During 2014, we entered into forward starting swaps that were designated as cash flow hedges to hedge against changes in interest rates that could impact an anticipated issuance of debt in 2015. During 2015, we entered into additional forward starting swaps and treasury rate locks. Forward starting swaps and treasury rate locks with a combined aggregate notional value of $2.900 billion were settled upon the issuance of debt in August 2015, when the net fair value of the forward starting swaps and treasury rate locks in accumulated other comprehensive income was in a loss position of $21.6 million. The net loss will be recognized as interest expense over the life of the associated senior notes. During 2015 and in January 2016, we entered into forward starting swaps with effective dates in September 2017 and maturing in ten years.

Interest Rate Swap Contracts: From time to time we hedge the fair value of certain debt obligations through the use of interest rate swap contracts. The interest rate swap contracts are designated hedges of the fair value changes in the notes attributable to changes in interest rates. Since the specific terms and notional amount of the swap are intended to match those of the debt being hedged, it is assumed to be a highly effective hedge and all changes in fair value of the swap are recorded on the Consolidated Balance Sheets with no net impact recorded in income. Any net interest payments made or received on interest rate swap contracts are recognized as interest expense. If a hedging relationship is terminated for an interest rate swap contract, accumulated gains or losses associated with the contract are measured and recorded as a reduction or increase of current and future interest expense associated with the previously hedged debt obligations.

We have entered into swap contracts that were designated as hedges of certain of our fixed rate notes and also terminated the hedging relationship by settling certain of those swap contracts during 2013, 2014 and 2015. The settlement of swap contracts due to terminations and maturities resulted in the receipt of net proceeds of $10.8 million and $25.5 million in 2015 and 2014, respectively, which are accounted for as a reduction of current and future interest expense associated with these notes. See Note 11 for additional details related to reductions of current and future interest expense.

The following table summarizes the notional amounts of our outstanding interest rate swap contracts at December 31, 2015 and December 31, 2014: 

	Notional Amount
	2015		2014
Interest rate swap contracts entered into as fair value hedges of the following fixed-rate senior notes:
2.450% senior notes due 2015	$	—	$	300.0
1.900% senior notes due 2017	300.0		300.0
2.300% senior notes due 2018	200.0		200.0
2.250% senior notes due 2019	500.0		500.0
3.950% senior notes due 2020	500.0		500.0
3.250% senior notes due 2022	1,000.0		750.0
4.000% senior notes due 2023	700.0		150.0
3.625% senior notes due 2024	100.0		—
3.875% senior notes due 2025	250.0		—
Total	$	3,550.0	$	2,700.0

The following table summarizes the fair value and presentation in the Consolidated Balance Sheets for derivative instruments as of December 31, 2015 and 2014:

		December 31, 2015
		Fair Value
Instrument	Balance Sheet Location	Asset Derivatives		Liability Derivatives
Derivatives designated as hedging instruments:
Foreign exchange contracts1	Other current assets	$	356.2	$	18.0
	Other non-current assets	287.8		28.0
Interest rate swap agreements	Other current assets	30.7		—
	Other non-current assets	26.1		4.7
	Other non-current liabilities	0.2		0.9
Derivatives not designated as hedging instruments:
Foreign exchange contracts1	Other current assets	46.0		5.9
	Other current liabilities	2.9		7.4
Interest rate swap agreements	Other current assets	2.4		2.3
	Other non-current assets	2.4		1.4
Total		$	754.7	$	68.6

		December 31, 2014
		Fair Value
Instrument	Balance Sheet Location	Asset Derivatives		Liability Derivatives
Derivatives designated as hedging instruments:
Foreign exchange contracts1	Other current assets	$	264.9	$	44.9
	Other current liabilities	0.1		1.7
	Other non-current assets	322.3		17.5
Interest rate swap agreements	Other current assets	17.9		—
	Other non-current assets	4.8		0.3
	Other non-current liabilities	—		3.8
Derivatives not designated as hedging instruments:
Foreign exchange contracts1	Other current assets	39.7		6.0
	Other current liabilities	0.1		1.1
Interest rate swap agreements	Other current assets	0.1		—
	Other non-current assets	1.3		—
Total		$	651.2	$	75.3

¹Derivative instruments in this category are subject to master netting arrangements and are presented on a net basis in the Consolidated Balance Sheets in accordance with ASC 210-20.

The following table summarizes the effect of derivative instruments designated as cash-flow hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	2015
	(Effective Portion)							(Ineffective Portion and Amount Excluded From Effectiveness Testing)
Instrument	Amount of Gain/(Loss) Recognized in OCI on Derivative1			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative
Foreign exchange contracts	$	429.4		Net product sales	$	354.4		Other income, net	$	20.0		2
Treasury rate lock agreements	$	(27.9	)	Interest expense	$	(4.2	)	Other income, net	$	(0.2	)	3
Forward starting interest rate swaps	$	9.0		Interest expense	$	(1.5	)	Other income, net	$	0.3		3

¹  Net gains of $364.8 million are expected to be reclassified from Accumulated OCI into income in the next 12 months.

²  The amount of net gains recognized in income represents $23.0 million of gains related to amounts excluded from the assessment of hedge effectiveness (fair value adjustments of forward point amounts) and $3.0 million in losses related to the ineffective portion of the hedging relationships.

³  The amount of net (loss) gain recognized in income relates to the ineffective portion of the hedging relationships.

	2014
	(Effective Portion)							(Ineffective Portion and Amount Excluded From Effectiveness Testing)
Instrument	Amount of Gain/(Loss) Recognized in OCI on Derivative1			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative
Foreign exchange contracts	$	600.4		Net product sales	$	27.5		Other income, net	$	(12.2	)	1
Treasury rate lock agreements	$	—		Interest expense	$	(3.5	)
Forward starting interest rate swaps	$	(32.3	)	Interest expense	$	(0.9	)	Other income, net	(3.6		)	2

¹  The amount of net gain recognized in income represents $18.0 million in losses related to amounts excluded from the assessment of hedge effectiveness (fair value adjustments of forward point amounts) and $5.8 million of gains related to the ineffective portion of the hedging relationships.

²  The amount of net loss recognized in income relates to the ineffective portion of the hedging relationships.

The following table summarizes the effect of derivative instruments designated as fair value hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain (Loss) Recognized in Income on Derivative
Instrument		2015		2014
Interest rate swaps	Interest expense	$	60.3	$	43.0

The following table summarizes the effect of derivative instruments not designated as hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain (Loss) Recognized in Income on Derivative
Instrument		2015			2014
Foreign exchange contracts	Other income, net	$	81.2		$	79.3
Put options sold	Other income, net	$	(9.9	)	$	11.6

The impact of gains and losses on foreign exchange contracts not designated as hedging instruments related to changes in the fair value of assets and liabilities denominated in foreign currencies are generally offset by net foreign exchange gains and losses, which are also included on the Consolidated Statements of Income in other income (expense), net for all periods presented. When we enter into foreign exchange contracts not designated as hedging instruments to mitigate the impact of exchange rate volatility in the translation of foreign earnings, gains and losses will generally be offset by fluctuations in the U.S. Dollar translated amounts of each Income Statement account in current and/or future periods.

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Cash, Cash Equivalents and Marketable Securities Available-for-Sale

12 Months Ended

Dec. 31, 2015

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Cash, Cash Equivalents and Marketable Securities Available-for-Sale

Cash, Cash Equivalents and Marketable Securities Available-for-Sale

Money market funds of $1.413 billion and $2.251 billion at December 31, 2015 and 2014, respectively, were recorded at cost, which approximates fair value and are included in cash and cash equivalents.

The amortized cost, gross unrealized holding gains, gross unrealized holding losses and estimated fair value of available-for-sale securities by major security type and class of security at December 31, 2015 and 2014 were as follows:

December 31, 2015	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
U.S. Treasury securities	$	153.0	$	—	$	(0.4	)	$	152.6
U.S. government-sponsored agency MBS	29.8		0.1		(0.4		)	29.5
Corporate debt – global	219.7		—		(1.6		)	218.1
Asset backed securities	35.6		—		(0.1		)	35.5
Marketable equity securities	811.5		468.1		(43.7		)	1,235.9
Total available-for-sale marketable securities	$	1,249.6	$	468.2	$	(46.2	)	$	1,671.6

December 31, 2014	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
U.S. Treasury securities	$	1,044.7	$	0.3	$	(0.8	)	$	1,044.2
U.S. government-sponsored agency securities	145.1		0.1		(0.1		)	145.1
U.S. government-sponsored agency MBS	531.1		1.0		(2.7		)	529.4
Non-U.S. government, agency and supranational securities	32.4		—		(0.1		)	32.3
Corporate debt – global	446.3		0.6		(1.2		)	445.7
Asset backed securities	177.3		—		(0.2		)	177.1
Marketable equity securities	335.2		716.3		(0.2		)	1,051.3
Total available-for-sale marketable securities	$	2,712.1	$	718.3	$	(5.3	)	$	3,425.1

U.S. government-sponsored agency securities include general unsecured obligations either issued directly by or guaranteed by U.S. Government Sponsored Enterprises. U.S. government-sponsored agency MBS include mortgage-backed securities issued by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation and the Government National Mortgage Association. Non-U.S. government, agency and supranational securities consist of direct obligations of highly rated governments of nations other than the United States and obligations of sponsored agencies and other entities that are guaranteed or supported by highly rated governments of nations other than the United States. Corporate debt-global includes obligations issued by investment-grade corporations, including some issues that have been guaranteed by governments and government agencies. Asset backed securities consist of triple-A rated securities with cash flows collateralized by credit card receivables and auto loans. Marketable equity securities consist of investments in publicly traded equity securities.  The decrease in net unrealized gains in marketable equity securities in 2015 compared to 2014 primarily reflects the decrease in market value for certain equity investments subsequent to their respective initial public offerings. Net unrealized losses in marketable debt securities primarily reflect the impact of increased interest rates at December 31, 2015.

The fair value of all available-for-sale securities, which have been in an unrealized loss position for less than and longer than 12 months at December 31, 2015, was as follows:

	Less than 12 months					12 months or longer					Total
December 31, 2015	Estimated Fair Value		Gross Unrealized Loss			Estimated Fair Value		Gross Unrealized Loss			Estimated Fair Value		Gross Unrealized Loss
U.S. Treasury securities	$	143.6	$	(0.4	)	$	—	$	—		$	143.6	$	(0.4	)
U.S. government-sponsored agency MBS	12.8		(0.3		)	6.8		(0.1		)	19.6		(0.4		)
Corporate debt – global	193.5		(1.6		)	—		—			193.5		(1.6		)
Asset backed securities	29.6		(0.1		)	5.9		—			35.5		(0.1		)
Marketable equity securities	494.4		(43.7		)	—		—			494.4		(43.7		)
Total	$	873.9	$	(46.1	)	$	12.7	$	(0.1	)	$	886.6	$	(46.2	)

The Company believes that the decline in fair value of securities held at December 31, 2015 below their cost is temporary and intends to retain its investment in these securities for a sufficient period of time to allow for recovery in the market value of these investments.

Duration periods of available-for-sale debt securities at December 31, 2015 were as follows:

	Amortized Cost		Fair Value
Duration of one year or less	$	58.4	$	58.3
Duration of one through three years	363.7		361.8
Duration of three through five years	15.9		15.6
Total	$	438.0	$	435.7

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Inventory

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Inventory

Inventory

A summary of inventories by major category at December 31, 2015 and 2014 follows:

	2015		2014
Raw materials	$	201.3	$	200.0
Work in process	120.0		101.5
Finished goods	122.1		91.6
Total	$	443.4	$	393.1

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Property, Plant and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Land	$	75.4	$	37.9
Buildings	274.1		260.8
Building and operating equipment	33.1		32.0
Leasehold improvements	152.3		135.5
Machinery and equipment	246.6		213.5
Furniture and fixtures	53.2		48.8
Computer equipment and software	389.6		332.8
Construction in progress	221.3		104.8
Subtotal	1,445.6		1,166.1
Less accumulated depreciation and amortization	631.5		523.5
Total	$	814.1	$	642.6

The increase in the balance of construction in progress from December 31, 2014 to December 31, 2015 primarily relates to the expansion of our corporate headquarters in Summit, New Jersey.

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Other Financial Information

12 Months Ended

Dec. 31, 2015

Other Financial Information

Other Financial Information

Other Financial Information

Accrued expenses at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Compensation	$	297.8	$	285.2
Rebates, distributor chargebacks and distributor services	365.5		232.9
Clinical trial costs and grants	255.1		189.5
Interest	170.3		59.1
Royalties, license fees and collaboration agreements	75.9		26.7
Commercial related activities	38.7		56.2
Sales returns	18.8		10.2
Rent	18.1		14.0
Professional services	14.9		7.9
Other taxes	7.9		9.3
Other	113.7		100.1
Total	$	1,376.7	$	991.1

Other current liabilities at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Deferred tax liability	$	—	$	131.2
Contingent consideration – Quanticel acquisition	82.5		—
Contingent consideration – Nogra acquisition	24.9		24.7
Contingent consideration – Avila acquisition	2.0		9.8
Compensation	55.6		32.6
Sales, use and value added tax	61.1		56.8
Derivative contracts	4.5		2.6
Collaboration agreement upfront payable	40.3		14.0
Other	0.1		4.1
Total	$	271.0	$	275.8

Other non-current liabilities at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Contingent consideration – Quanticel acquisition	$	84.2	$	—
Contingent consideration – Nogra acquisition	1,214.5		1,110.8
Contingent consideration – Avila acquisition	94.5		114.2
Contingent consideration – Gloucester acquisition	18.9		19.5
Contingent Value Rights - Abraxis acquisition	51.9		136.3
Deferred compensation and long-term incentives	170.5		150.5
Deferred tax liability	377.7		555.6
Other	29.5		49.8
Total	$	2,041.7	$	2,136.7

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Intangible Assets and Goodwill

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

Intangible Assets and Goodwill

Intangible Assets: Our finite lived intangible assets primarily consist of developed product rights and technology obtained from the Pharmion Corp. (Pharmion), Gloucester, Abraxis BioScience, Inc. (Abraxis), Avila and Quanticel acquisitions. Our indefinite lived intangible assets consist of acquired IPR&D product rights from the Receptos, Nogra and Gloucester acquisitions. The remaining weighted-average amortization period for finite-lived intangible assets not fully amortized is approximately 9.7 years.

Intangible assets outstanding as of December 31, 2015 and December 31, 2014 are summarized as follows:

December 31, 2015	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,448.3	)	$	1,957.6
Technology	565.7		(197.1		)	368.6
Licenses	66.7		(22.3		)	44.4
Other	44.0		(27.1		)	16.9
	4,082.3		(1,694.8		)	2,387.5
Non-amortized intangible assets:
Acquired IPR&D product rights	8,470.6		—			8,470.6
Total intangible assets	$	12,552.9	$	(1,694.8	)	$	10,858.1

December 31, 2014	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,234.1	)	$	2,171.8
Technology	333.7		(135.1		)	198.6
Licenses	67.0		(18.1		)	48.9
Other	42.5		(22.9		)	19.6
	3,849.1		(1,410.2		)	2,438.9
Non-amortized intangible assets:
Acquired IPR&D product rights	1,628.7		—			1,628.7
Total intangible assets	$	5,477.8	$	(1,410.2	)	$	4,067.6

The gross carrying value of intangible assets increased by $7.075 billion in 2015 compared to 2014 primarily due to the addition of $6.842 billion of IPR&D from the Receptos acquisition and $0.232 billion of a technology platform from the Quanticel acquisition.

Amortization expense was $284.7 million, $263.9 million and $270.1 million for the years ended December 31, 2015, 2014 and 2013, respectively. Amortization expense increased by a net $20.8 million in 2015 compared to 2014, the increase primarily related to the amortization of technology related to the acquisition of Quanticel and an acceleration of amortization expense related to certain Gloucester related intangible assets. Assuming no changes in the gross carrying amount of intangible assets, the future annual amortization expense related to intangible assets is expected to be approximately $373.1 million in 2016, $372.4 million in 2017, $299.1 million in 2018, $162.9 million in 2019, and $153.8 million in 2020.

Goodwill: At December 31, 2015, our goodwill related to the 2015 acquisitions of Receptos and Quanticel, 2014 acquisition of Nogra, the 2012 acquisition of Avila, the 2010 acquisitions of Abraxis and Gloucester, the 2008 acquisition of Pharmion and the 2004 acquisition of Penn T Limited.

The change in carrying value of goodwill is summarized as follows:

Balance at December 31, 2014	$	2,191.2
Acquisition of Receptos	2,570.0
Acquisition of Quanticel	117.8
Balance at December 31, 2015	$	4,879.0

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Debt

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Debt

Debt

Short-Term Borrowings and Current Portion of Long-Term Debt: The carrying value of short-term borrowings and current portion of long-term debt outstanding at December 31, 2015 and December 31, 2014 includes:

	2015		2014
Commercial paper	$	—	$	99.6
2.450% senior notes due 2015	—		506.3
Total	$	—	$	605.9

Long-Term Debt:   We have an aggregate $14.250 billion principal amount of senior notes outstanding at varying maturity dates and interest rates. The carrying values of the long-term portion of these senior notes at December 31, 2015 and 2014 are summarized below:

	2015		2014
1.900% senior notes due 2017	$	501.2	$	501.0
2.125% senior notes due 2018	999.9		—
2.300% senior notes due 2018	401.7		401.2
2.250% senior notes due 2019	505.1		502.5
2.875% senior notes due 2020	1,497.5		—
3.950% senior notes due 2020	507.1		502.8
3.250% senior notes due 2022	1,016.1		1,010.2
3.550% senior notes due 2022	997.4		—
4.000% senior notes due 2023	710.3		708.5
3.625% senior notes due 2024	1,001.7		996.8
3.875% senior notes due 2025	2,475.6		—
5.700% senior notes due 2040	249.6		249.5
5.250% senior notes due 2043	396.7		396.7
4.625% senior notes due 2044	996.6		996.5
5.000% senior notes due 2045	1,993.9		—
Total long-term debt	$	14,250.4	$	6,265.7

At December 31, 2015, the fair value of our outstanding Senior Notes was $14.299 billion and represented a Level 1 measurement within the fair value measurement hierarchy.

In August 2015, we issued an additional $8.000 billion principal amount of senior notes consisting of $1.000 billion aggregate principal amount of 2.125% Senior Notes due 2018 (the 2018 notes), $1.500 billion aggregate principal amount of 2.875% Senior Notes due 2020 (the 2020 notes), $1.000 billion aggregate principal amount of 3.550% Senior Notes due 2022 (the 2022 notes), $2.500 billion aggregate principal amount of 3.875% Senior Notes due 2025 (the 2025 notes) and $2.000 billion aggregate principal amount of 5.000% Senior Notes due 2045 (the 2045 notes and together with the 2018 notes, the 2020 notes, the 2022 notes, and the 2025 notes, referred to herein as the “2015 issued notes”).

The 2015 issued notes were issued at 99.994%, 99.819%, 99.729%, 99.034%, and 99.691% of par, respectively, and the discount is being amortized as additional interest expense over the period from issuance through maturity. Offering costs of approximately $50.0 million have been recorded as debt issuance costs on our Consolidated Balance Sheets and are being amortized as additional interest expense using the effective interest rate method over the period from issuance through maturity. Interest on the 2015 issued notes is payable semi-annually in arrears on February 15 and August 15 each year beginning February 15, 2016 and the principal on each 2015 issued note is due in full at their respective maturity dates. The 2015 issued notes may be redeemed at our option, in whole or in part; the 2018 notes, the 2020 notes, and the 2022 notes may be redeemed at any time, the 2025 notes and 2045 notes may be redeemed at three months and six months prior to the maturity dates, respectively.

Early redemption would be at a redemption price equaling accrued and unpaid interest plus the greater of 100% of the principal amount of the 2015 issued notes to be redeemed or the sum of the present values of the remaining scheduled payments of interest and principal discounted to the date of redemption on a semi-annual basis plus 20 basis points in the case of the 2018 notes, 20 basis points in the case of the 2020 notes, 25 basis points in the case of the 2022 notes, 30 basis points in the case of the 2025 notes, and 35 basis points in the case of the 2045 notes. If we experience a change of control accompanied by a downgrade of the debt to below investment grade, we will be required to offer to repurchase the 2015 issued notes at a purchase price equal to 101% of their principal amount plus accrued and unpaid interest. We are subject to covenants which limit our ability to pledge properties as security under borrowing arrangements and limit our ability to perform sale and leaseback transactions involving our property.

In 2015, the 2.45% senior notes with a principal amount of $500.0 million matured and were repaid. We also assumed $13.9 million of debt obligations as part of the acquisition of Quanticel in 2015 that were repaid in 2015.

From time to time, we have used treasury rate locks and forward starting interest rate swap contracts to hedge against changes in interest rates in anticipation of issuing fixed-rate notes. As of December 31, 2015, a balance of $68.1 million in losses remained in accumulated OCI related to settlements of these derivative instruments and will be recognized as interest expense over the life of the notes.

At December 31, 2015, we were party to pay-floating, receive-fixed interest rate swap contracts designated as fair value hedges

of fixed-rate notes as described in Note 5. Our swap contracts outstanding at December 31, 2015 effectively convert the hedged portion of our fixed-rate notes to floating rates. From time to time we terminate the hedging relationship on certain of our swap contracts by settling the contracts or by entering into offsetting contracts. Any net proceeds received or paid in these settlements are accounted for as a reduction or increase of current and future interest expense associated with the previously hedged notes. As of December 31, 2015, we had a balance of $33.1 million of unamortized gains recorded as a component of our debt as a result of past swap contract settlements, including $6.0 million related to the settlement of swap contracts during 2015.

Commercial Paper: The carrying value of Commercial Paper as of December 31, 2015 and 2014 was $0.0 million and $99.6 million, respectively, and approximated its fair value. As of December 31, 2015, we had available capacity to issue up to $1.750 billion of Commercial Paper and there were no borrowings under the Program.

Senior Unsecured Credit Facility: We maintain a senior unsecured revolving credit facility (Credit Facility) that provides revolving credit in the aggregate amount of $1.750 billion, which was increased from $1.500 billion in April 2015. Also in April 2015, the term of the Credit Facility was extended from April 18, 2018 to April 17, 2020. Subject to certain conditions, we have the right to increase the amount of the Credit Facility (but in no event more than one time per annum) up to a maximum aggregate amount of $2.000 billion.  Amounts may be borrowed in U.S. dollars for general corporate purposes. The Credit Facility currently serves as backup liquidity for our Commercial Paper borrowings. At December 31, 2015 and 2014, there was no outstanding borrowing against the Credit Facility.

The Credit Facility contains affirmative and negative covenants including certain customary financial covenants.  We were in compliance with all financial covenants as of December 31, 2015.

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Stockholders' Equity

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Stockholders' Equity

Stockholders' Equity

Preferred Stock: Our Board of Directors is authorized to issue, at any time, without further stockholder approval, up to 5.0 million shares of preferred stock, and to determine the price, rights, privileges, and preferences of such shares.

Common Stock: At December 31, 2015, we were authorized to issue up to 1.150 billion shares of common stock of which shares of common stock issued totaled 940.1 million.

Treasury Stock: During the period of April 2009 through December 2015, our Board of Directors has approved repurchases of up to an aggregate $17.500 billion of our common stock, including the June 2015 authorization to repurchase an additional $4.000 billion of our common stock. We repurchased $3.251 billion, $2.928 billion, and $2.769 billion of treasury stock under the program in 2015, 2014 and 2013, respectively, excluding transaction fees. As of December 31, 2015 an aggregate 146.9 million common shares were repurchased under the program at an average price of $92.67 per common share and total cost of $13.610 billion.

Other: When employee awards of RSUs vest and are settled net in order to fulfill minimum statutory tax withholding requirements, the shares withheld are reflected as treasury stock.

A summary of changes in common stock issued and treasury stock is presented below (in millions of shares):

	Common Stock	Common Stock in Treasury
December 31, 2012	880.9	(78.7	)
Exercise of stock options and conversion of restricted stock units	25.0	(0.5	)
Issuance of common stock for employee benefit plans	0.6	—
Shares repurchased under share repurchase program	—	(22.3	)
December 31, 2013	906.5	(101.5	)
Exercise of stock options and conversion of restricted stock units	18.3	(1.3	)
Issuance of common stock for employee benefit plans	—	0.2
Shares repurchased under share repurchase program	—	(22.0	)
December 31, 2014	924.8	(124.6	)
Exercise of stock options and conversion of restricted stock units	15.3	(1.2	)
Issuance of common stock for employee benefit plans	—	0.4
Shares repurchased under share repurchase program	—	(28.1	)
December 31, 2015	940.1	(153.5	)

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Accumulated Other Comprehensive Income

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Accumulated Other Comprehensive Income

 Accumulated Other Comprehensive Income

The components of other comprehensive income (loss) consist of changes in pension liability, changes in net unrealized gains (losses) on marketable securities classified as available-for-sale, net unrealized gains (losses) related to cash flow hedges and changes in foreign currency translation adjustments.

The accumulated balances related to each component of other comprehensive income (loss), net of tax, are summarized as follows:

	Pension Liability			Net Unrealized Gains (Losses) From Marketable Securities			Net Unrealized Gains (Losses) From Hedges			Foreign Currency Translation Adjustment			Total Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2013	$	(6.9	)	$	137.3		$	(36.0	)	$	(0.4	)	$	94.0
Other comprehensive income (loss) before reclassifications	(8.6		)	320.1			580.4			(49.8		)	842.1
Amount reclassified from accumulated other comprehensive income	—			3.5			(24.8		)	—			(21.3		)
Net current-period other comprehensive income (loss)	(8.6		)	323.6			555.6			(49.8		)	820.8
Balance December 31, 2014	$	(15.5	)	$	460.9		$	519.6		$	(50.2	)	$	914.8
Other comprehensive income (loss) before reclassifications	1.6			(204.6		)	417.7			(26.1		)	188.6
Amount reclassified from accumulated other comprehensive income	—			15.2			(350.9		)	—			(335.7		)
Net current-period other comprehensive income (loss)	1.6			(189.4		)	66.8			(26.1		)	(147.1		)
Balance December 31, 2015	$	(13.9	)	$	271.5		$	586.4		$	(76.3	)	$	767.7

		Gains (Losses) Reclassified Out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Components	Affected Line Item in the Consolidated Statements of Income	Years Ended December 31,
		2015			2014			2013
Gains (losses) from cash-flow hedges:
Foreign exchange contracts	Net product sales	$	354.4		$	27.5		$	10.7
Treasury rate lock agreements	Interest (expense)	(4.2		)	(3.5		)	(3.4		)
Interest rate swap agreements	Interest (expense)	(1.5		)	(0.9		)	—
	Income tax benefit	2.2			1.7			6.9
Gains (losses) from available-for-sale marketable securities:
Realized income (loss) on sales of marketable securities	Interest and investment income, net	(23.4		)	(5.4		)	(7.3		)
	Income tax benefit	8.2			1.9			2.2
Total reclassification, net of tax		$	335.7		$	21.3		$	9.1

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Share-Based Compensation

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

Share-Based Compensation

We have a stockholder-approved stock incentive plan, the 2008 Stock Incentive Plan (Amended and Restated as of April 15, 2015) (Plan) that provides for the granting of options, RSUs, PSUs and other share-based awards to our employees and officers. The Management Compensation and Development Committee of the Board of Directors (Compensation Committee) may determine the type, amount and terms, including vesting, of any awards made under the Plan.

On June 17, 2015, our stockholders approved an amendment of the Plan, which included the following key modifications: adoption of an aggregate share reserve of 247.8 million shares of Common Stock, which includes 19.8 million new shares of Common Stock; and an extension of the term of the Plan through April 15, 2025.

With respect to options granted under the Plan, the exercise price may not be less than the market closing price of the common stock on the date of grant. In general, options granted under the Plan vest over periods ranging from immediate vesting to four-year vesting and expire ten years from the date of grant, subject to earlier expiration in case of termination of employment unless the participant meets the retirement provision under which the option would have a maximum of three additional years to vest. The vesting period for options granted under the Plan is subject to certain acceleration provisions if a change in control, as defined in the Plan, occurs. Plan participants may elect to exercise options at any time during the option term. However, any shares so purchased which have not vested as of the date of exercise shall be subject to forfeiture, which will lapse in accordance with the established vesting time period.

During 2015, we increased our usage of PSUs and began issuing PSUs to certain executive officers that are payable in shares of our common stock at the end of a three-year performance measurement period. The number of shares to be issued at the end of the measurement period will vary, based on performance, from 0% to 200% of the target number of PSUs granted, depending on the achievement of specified performance and market targets for revenue (37.5% weighting), earnings per share (37.5% weighting), and relative total shareholder return (25% weighting). All shares delivered upon PSU vesting are restricted from trading for one year and one day from the vesting date.

The grant date fair value for the portion of the PSUs related to revenue and earnings per share was estimated using the fair market value of our common stock on the grant date. The grant date fair value for the portion of the PSUs related to relative total shareholder return was estimated using the Monte Carlo valuation model.

Shares of common stock available for future share-based grants under all plans were 38.3 million at December 31, 2015.

The following table summarizes the components of share-based compensation expense in the Consolidated Statements of Income for the years ended December 31, 2015, 2014 and 2013:

	2015		2014		2013
Cost of goods sold	$	31.7	$	26.2	$	18.5
Research and development	250.7		196.5		144.7
Selling, general and administrative	294.2		224.9		162.6
Total share-based compensation expense	576.6		447.6		325.8
Tax benefit related to share-based compensation expense	161.2		129.3		94.5
Reduction in income	$	415.4	$	318.3	$	231.3

Included in share-based compensation expense for the years ended December 31, 2015, 2014 and 2013 was compensation expense related to non-qualified stock options of $346.1 million, $276.3 million and $197.6 million, respectively. Net proceeds received from share-based compensation arrangements for the years ended December 31, 2015, 2014 and 2013 were $251.7 million, $297.2 million and $551.6 million, respectively, and the excess tax benefit recognized was $300.5 million, $250.6 million and $169.4 million, respectively. We do not recognize a deferred tax asset for excess tax benefits that have not been realized and have adopted the tax law method as our accounting policy regarding the ordering of tax benefits to determine whether an excess tax benefit has been realized.

Stock Options: As of December 31, 2015, there was $640.9 million of total unrecognized compensation cost related to stock options granted under the plans. That cost will be recognized over an expected remaining weighted-average period of 2.0 years.

The weighted-average grant date fair value of the stock options granted during the years ended December 31, 2015, 2014 and 2013 was $38.83 per share, $27.92 per share and $20.22 per share, respectively. We estimated the fair value of options granted using a Black-Scholes option pricing model with the following assumptions:

	2015	2014	2013
Risk-free interest rate	1.17% - 1.72%	1.51% - 1.90%	0.68% - 1.70%
Expected volatility	31% - 38%	28% - 37%	27% - 35%
Weighted average expected volatility	34%	33%	31%
Expected term (years)	5.02 - 5.04	5.02 - 5.06	5.03 - 5.50
Expected dividend yield	0%	0%	0%

The risk-free interest rate is based on the U.S. Treasury zero-coupon curve. Expected volatility of stock option awards is estimated based on the implied volatility of our publicly traded options with settlement dates of six months. The use of implied volatility was based upon the availability of actively traded options on our common stock and the assessment that implied volatility is more representative of future stock price trends than historical volatility. The expected term of an employee share option is the period of time for which the option is expected to be outstanding. We made a determination of expected term by analyzing employees' historical exercise experience from its history of grants and exercises in our option database and management estimates. Forfeiture rates are estimated based on historical data.

The following table summarizes all stock option activity for the year ended December 31, 2015:

	Options		Weighted Average Exercise Price Per Option		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In Millions)
Outstanding at December 31, 2014	77.2		$	49.47	6.9	$	4,823.8
Changes during the Year:
Granted	11.8		118.65
Exercised	(11.5	)	34.39
Forfeited	(1.7	)	74.20
Expired	(0.1	)	39.48
Outstanding at December 31, 2015	75.7		$	61.99	6.6	$	4,411.8
Vested at December 31, 2015 or expected to vest in the future	75.1		$	61.64	6.6	$	4,400.1
Vested at December 31, 2015	41.2		$	41.12	5.3	$	3,238.5

The total fair value of shares vested during the years ended December 31, 2015, 2014 and 2013 was $266.5 million, $211.3 million and $159.3 million, respectively. The total intrinsic value of stock options exercised during the years ended December 31, 2015, 2014 and 2013 was $993.5 million, $946.6 million and $814.7 million, respectively. We primarily utilize newly issued shares to satisfy the exercise of stock options.

Restricted Stock Units: We issue RSUs, under our equity program in order to provide an effective incentive award with a strong retention component. Equity awards may, at the option of employee participants, be divided between stock options and RSUs. The employee may choose between alternate Company defined mixes of stock options and RSUs, with the number of options to be granted reduced by four for every one RSU to be granted. Information regarding the Company's RSUs for the year ended December 31, 2015 is as follows:

Nonvested RSUs	Share Equivalent		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2014	9.4		$	59.02
Changes during the period:
Granted	2.5		112.98
Vested	(3.8	)	37.57
Forfeited	(0.4	)	71.95
Nonvested at December 31, 2015	7.7		$	86.28

As of December 31, 2015, there was $325.0 million of total unrecognized compensation cost related to non-vested RSU awards. That cost is expected to be recognized over a weighted-average period of 1.4 years. The Company primarily utilizes newly issued shares to satisfy the vesting of RSUs.

Performance-Based Restricted Stock Units: We grant performance-based restricted stock units that vest contingent upon the achievement of pre-determined performance-based milestones that are either related to product development or the achievement of specified performance and market targets, including revenue, earnings per share, and relative total shareholder return. The following table summarizes the Company's performance-based restricted stock unit activity for the year ended December 31, 2015 (shares in thousands):

Nonvested Performance-Based RSUs	Share Equivalent		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2014	133		$	69.57
Changes during the period:
Granted	211		112.14
Vested	—		—
Forfeited	(10	)	82.91
Non-vested at December 31, 2015	334		$	96.07

As of December 31, 2015, there was $17.9 million of total unrecognized compensation cost related to non-vested awards of performance-based RSUs that is expected to be recognized over a weighted-average period of 1.6 years.

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Employee Benefit Plans

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plans

Employee Benefit Plans

We sponsor an employee savings and retirement plan, which qualifies under Section 401(k) of the Internal Revenue Code, as amended (the Code) for our U.S. employees. Our contributions to the U.S. savings plan are discretionary and have historically been made in the form of our common stock (See Note 12). Such contributions are based on specified percentages of employee contributions up to 6% of eligible compensation or a maximum permitted by law. Total expense for contributions to the U.S. savings plans were $35.1 million, $40.7 million and $32.6 million in 2015, 2014 and 2013, respectively.

We also sponsor defined contribution plans in certain foreign locations. Participation in these plans is subject to the local laws that are in effect for each country and may include statutorily imposed minimum contributions. We also maintain defined benefit plans in certain foreign locations for which the obligations and the net periodic pension costs were determined to be immaterial at December 31, 2015.

In 2000, our Board of Directors approved a deferred compensation plan. The plan was frozen effective as of December 31, 2004, and no additional contributions or deferrals can be made to that plan. Accrued benefits under the frozen plan will continue to be governed by the terms under the tax laws in effect prior to the enactment of American Jobs Creation Act of 2004, Section 409A (Section 409A).

In February 2005, our Board of Directors adopted the Celgene Corporation 2005 Deferred Compensation Plan, effective as of January 1, 2005, and amended the plan in February 2008. This plan operates as our ongoing deferred compensation plan and is intended to comply with Section 409A. Eligible participants, which include certain top-level executives as specified by the plan, can elect to defer up to an amended 90% of the participant's base salary, 100% of cash bonuses and equity compensation allowed under Section 409A. Company contributions to the deferred compensation plan represent a match to certain participants' deferrals up to a specified percentage, which currently ranges from 10% to 20%, depending on the employee's position as specified in the plan, of the participant's base salary. We recorded expenses of $0.3 million, $0.3 million and $0.6 million related to the deferred compensation plans in 2015, 2014 and 2013, respectively. The Company's matches are fully vested upon contribution. All other Company contributions to the plan do not vest until the specified requirements are met. At December 31, 2015 and 2014, we had a deferred compensation liability included in other non-current liabilities in the Consolidated Balance Sheets of approximately $104.5 million and $91.0 million, respectively, which included the participant's elected deferral of salaries and bonuses, the Company's matching contribution and earnings on deferred amounts as of that date. The plan provides various alternatives for the measurement of earnings on the amounts participants defer under the plan. The measurement alternatives are based on returns of a variety of funds that offer plan participants the option to spread their risk across a diverse group of investments.

In 2003, we established a Long-Term Incentive Plan (LTIP) designed to provide key officers and executives with performance-based incentive opportunities contingent upon achievement of pre-established corporate performance objectives covering a three-year period. We currently have three separate three-year performance cycles running concurrently ending December 31, 2016, 2017 and 2018. Performance measures for each of the performance cycles are based on the following components: 37.5% on non-GAAP earnings per share (as defined in the LTIP); 37.5% on total non-GAAP revenue (as defined in the LTIP); and 25% on relative total shareholder return, which is a measurement of our stock price performance during the applicable three-year period compared with a group of other companies in the biopharmaceutical industry.

Threshold, target and maximum cash payout levels under the three current LTIP performance cycles are calculated as a percentage between 0% to 200% of each participant’s base salary at the time the LTIP was approved by the Compensation Committee. Such awards are payable in cash or common stock or a mixture of cash and common stock, which will be determined by the Compensation Committee at the time of award delivery. Share-based payout levels are calculated using the cash-based threshold, target and maximum levels, divided by the average closing price of Celgene stock for the 30 trading days prior to the commencement of each performance cycle. Therefore, final share-based award values are reflective of the stock price at the end of the measurement period. The Compensation Committee may determine that payments made in common stock are restricted from trading for a period of time. The estimated payout value for the concluded 2015 Plan is $17.4 million, which is included in accrued expenses at December 31, 2015, and the maximum potential cash-based payout, assuming maximum objectives are achieved for the 2016, 2017 and 2018 Plans are $25.2 million, $16.4 million and $16.3 million respectively. The reduction in the maximum potential cash-based payout for the 2017 Plan reflects a shift in the mix of compensation components for certain senior executives, including performance-based equity compensation in lieu of LTIP participation. We accrue the long-term incentive liability over each three-year cycle. Prior to the end of a three-year cycle, the accrual is based on an estimate of our level of achievement during the cycle. Upon a change in control, participants will be entitled to an immediate payment equal to their target award or, if higher, an award based on actual performance through the date of the change in control. For the years ended December 31, 2015, 2014 and 2013, we recognized expense related to the LTIP of $24.9 million, $42.3 million and $40.8 million, respectively.

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Income Taxes

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Income before income taxes is as follows:

	2015		2014		2013
U.S.	$	524.8	$	565.0	$	36.8
Non-U.S.	1,498.7		1,762.4		1,628.6
Income before income taxes	$	2,023.5	$	2,327.4	$	1,665.4

For the years ended December 31, 2015, 2014 and 2013, U.S. income before income taxes reflects charges related to share-based compensation, up-front collaboration payments, asset impairments, acquisitions and interest expense which in the aggregate, decreased in the United States from 2013 to 2014. Many of these charges are not deductible for U.S. income tax purposes. These charges were lower outside the United States in those years.

The provision (benefit) for taxes on income is as follows:

	2015			2014			2013
United States:
Taxes currently payable:
Federal	$	320.7		$	489.4		$	352.6
State and local	63.1			56.3			45.4
Deferred income taxes	(28.7		)	(273.8		)	(245.1		)
Total U.S. tax provision	355.1			271.9			152.9
International:
Taxes currently payable	71.1			54.1			64.1
Deferred income taxes	(4.7		)	1.5			(1.5		)
Total international tax provision	66.4			55.6			62.6
Total provision	$	421.5		$	327.5		$	215.5

Amounts are reflected in the preceding tables based on the location of the taxing authorities. We do not provide for U.S. federal or state income taxes on unremitted earnings of our international subsidiaries that are indefinitely invested outside the United States. As of December 31, 2015, we have not made a U.S. tax provision on $9.667 billion of unremitted earnings of our international subsidiaries. As these earnings are expected to be reinvested overseas indefinitely, it is not practicable to compute the estimated deferred tax liability on these earnings.

Deferred taxes arise because of different treatment between financial statement accounting and tax accounting, known as temporary differences. We record the tax effect on these temporary differences as deferred tax assets (generally items that can be used as a tax deduction or credit in future periods) or deferred tax liabilities (generally items for which we received a tax deduction but that have not yet been recorded in the Consolidated Statements of Income and the tax effects of acquisition related temporary differences). We periodically evaluate the likelihood of the realization of deferred tax assets, and reduce the carrying amount of these deferred tax assets by a valuation allowance to the extent we believe a portion will not be realized. We consider many factors when assessing the likelihood of future realization of deferred tax assets, including our recent cumulative earnings experience by taxing jurisdiction, expectations of future taxable income, the carryforward periods available to us for tax reporting purposes, tax planning strategies and other relevant factors. Significant judgment is required in making this assessment. At December 31, 2015 and 2014, it was more likely than not that we would realize our deferred tax assets, net of valuation allowances. The valuation allowances relate primarily to certain deferred tax assets acquired in the Receptos acquisition and certain fair value adjustments which are expected to result in non-deductible losses.

Approximately $900.0 million of our foreign earnings may not be required for use in offshore operations and may be available for use in the United States. These earnings are not treated as permanently reinvested, and our deferred tax liabilities include $316.5 million for the estimated U.S. federal and state income taxes that may be incurred should these earnings be repatriated. In drawing this conclusion, we considered our future sources of funds as well as our global operating and strategic liquidity needs, including common share repurchase activities and expansion of our commercial, research, manufacturing and administrative infrastructure worldwide.

At December 31, 2015 and 2014 the tax effects of temporary differences that give rise to deferred tax assets and liabilities were as follows:

	2015						2014
	Assets			Liabilities			Assets			Liabilities
NOL carryforwards	$	56.2		$	—		$	4.5		$	—
Deferred revenue	1.8			—			1.7			—
Capitalized research expenses	3.8			—			4.8			—
Tax credit carryforwards	10.7			—			5.0			—
Non-qualified stock options	340.9			—			250.5			—
Plant and equipment, primarily differences in depreciation	2.0			—			—			(7.4		)
Inventory	11.3			—			14.5			—
Other assets	43.0			(3.7		)	41.5			(4.0		)
Intangible assets	661.3			(1,135.4		)	654.7			(1,183.2		)
Accrued and other expenses	233.2			—			191.6			—
Unremitted earnings	—			(316.5		)	—			(316.5		)
Unrealized (gains) losses on securities	—			(129.9		)	—			(236.5		)
Subtotal	1,364.2			(1,585.5		)	1,168.8			(1,747.6		)
Valuation allowance	(90.8		)	—			(39.7		)	—
Total deferred taxes	$	1,273.4		$	(1,585.5	)	$	1,129.1		$	(1,747.6	)
Net deferred tax asset (liability)				$	(312.1	)				$	(618.5	)

At December 31, 2015 and 2014, deferred tax assets and liabilities were classified on our Consolidated Balance Sheets as follows:

	2015			2014
Current assets(1)	$	—		$	11.7
Other assets (non-current)	65.6			56.6
Current liabilities(1)	—			(131.2		)
Other non-current liabilities	(377.7		)	(555.6		)
Net deferred tax asset (liability)	$	(312.1	)	$	(618.5	)

⁽¹⁾ Balances reflect our early adoption of ASU 2015-17 on a prospective basis, which requires companies to classify all deferred tax assets and liabilities and associated valuation allowances as non-current on the balance sheet instead of separating deferred taxes and associated valuation allowances into current and non-current amounts. Prior periods were not retrospectively adjusted.

Reconciliation of the U.S. statutory income tax rate to the Company's effective tax rate is as follows:

Percentages	2015		2014		2013
U.S. statutory rate	35.0	%	35.0	%	35.0	%
Foreign tax rate differences	(21.0	)%	(22.3	)%	(28.8	)%
Unremitted earnings	—	%	—	%	—	%
State taxes, net of federal benefit	1.2	%	1.0	%	0.6	%
Change in valuation allowance	2.0	%	0.2	%	1.2	%
Acquisition related differences	4.5	%	(0.3	)%	3.7	%
Changes in uncertain tax positions	(0.5	)%	(0.4	)%	0.8	%
Other	(0.4	)%	0.9	%	0.4	%
Effective income tax rate	20.8	%	14.1	%	12.9	%

In our reconciliation of the U.S. statutory income tax rate to our effective tax rate, we disclose changes in uncertain tax positions which include the effect of settlements, expirations of statutes of limitations, and other changes in prior year tax positions.

We have operations in many foreign tax jurisdictions, which impose income taxes at different rates than the United States. The impact of these rate differences is included in the foreign tax rate differences that we disclose in our reconciliation of the U.S. statutory income tax rate to our effective tax rate. The benefit related to foreign tax rate differences primarily results from our commercial operations in Switzerland, which include significant research and development and manufacturing for worldwide markets. We operated under an income tax agreement in Switzerland through 2015 that provided an exemption from most Swiss income taxes on our operations in Switzerland. In 2013, we entered into a new agreement with the Swiss tax authorities which reflects the planned expansion of our Swiss operations and coupled with a 2014 reorganization of our Swiss operations will result in similar tax benefits through the end of 2024. The difference between the maximum statutory Swiss income tax rate (approximately 17.0% in 2015, 18.4% in 2014 and 19.7% in 2013) and our Swiss income tax rate under the tax agreement resulted in a reduction in the 2015, 2014 and 2013 effective tax rates of 25.7, 18.0 and 25.1 percentage points, respectively. The increase in benefits reflected in the foreign tax rate differences from 2014 to 2015 resulted primarily from an increase in the proportion of consolidated income before taxes from Swiss operations.

At December 31, 2015, we had federal NOL carryforwards of approximately $114.2 million and combined state NOL carryforwards of approximately $883.5 million that will expire in the years 2016 through 2035. We also have research and experimentation credit carryforwards of approximately $16.8 million that will expire in the years 2018 through 2034. Excess tax benefits related to stock option deductions incurred after December 31, 2005 are required to be recognized in the period in which the tax deduction is realized through a reduction of income taxes payable. As a result, we have not recorded deferred tax assets for certain stock option deductions included in our state NOL carryforwards and research and experimentation credit carryforwards. At December 31, 2015, deferred tax assets have not been recorded on state NOL carryforwards of approximately $476.4 million and for research and experimentation credits of approximately $4.0 million. These stock option tax benefits are expected to be recorded as an increase in additional paid-in capital when realized.

We realized share-based compensation deduction benefits in 2015, 2014 and 2013 for income tax purposes and have increased additional paid-in capital in the amount of approximately $302.1 million, $252.6 million and $170.0 million, respectively. We have recorded deferred income taxes related to net unrealized gains on securities as a component of accumulated other comprehensive income resulting in a deferred income tax liability at December 31, 2015 and 2014 of $129.9 million and $236.5 million, respectively.

On August 27, 2015, we acquired all of the outstanding common stock of Receptos. The acquisition was accounted for using the acquisition method of accounting, and we recorded a deferred tax liability of $2.519 billion related to the acquisition. Upon integration of the acquired assets into our offshore research, manufacturing, and commercial operations, the deferred tax liability was reclassified to a non-current tax liability. This liability represents an estimate of income tax that may be incurred in the future. This income tax liability is contingent upon successful development of the acquired IPR&D into a commercially viable product and would be incurred over the product's economic useful life.

Our tax returns are under routine examination in many taxing jurisdictions. The scope of these examinations includes, but is not limited to, the review of our taxable presence in a jurisdiction, our deduction of certain items, our claims for research and development credits, our compliance with transfer pricing rules and regulations and the inclusion or exclusion of amounts from our tax returns as filed. Our U.S. federal income tax returns have now been audited by the IRS through the year ended December 31, 2008. Tax returns for the years ended December 31, 2009, 2010, and 2011 are currently under examination by the IRS. We are also subject to audits by various state and foreign taxing authorities, including, but not limited to, most U.S. states and major European and Asian countries where we have operations.

We regularly reevaluate our tax positions and the associated interest and penalties, if applicable, resulting from audits of federal, state and foreign income tax filings, as well as changes in tax law (including regulations, administrative pronouncements, judicial precedents, etc.) that would reduce the technical merits of the position to below more likely than not. We believe that our accruals for tax liabilities are adequate for all open years. Many factors are considered in making these evaluations, including past history, recent interpretations of tax law and the specifics of each matter. Because tax regulations are subject to interpretation and tax litigation is inherently uncertain, these evaluations can involve a series of complex judgments about future events and can rely heavily on estimates and assumptions. We apply a variety of methodologies in making these estimates and assumptions, which include studies performed by independent economists, advice from industry and subject experts, evaluation of public actions taken by the IRS and other taxing authorities, as well as our industry experience. These evaluations are based on estimates and assumptions that have been deemed reasonable by management. However, if management's estimates are not representative of actual outcomes, our results of operations could be materially impacted.

Unrecognized tax benefits, generally represented by liabilities on the consolidated balance sheet and all subject to tax examinations, arise when the estimated benefit recorded in the financial statements differs from the amounts taken or expected to be taken in a tax return because of the uncertainties described above. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	2015			2014
Balance at beginning of year	$	251.8		$	219.2
Increases related to prior year tax positions	—			2.8
Decreases related to prior year tax positions	—			—
Increases related to current year tax positions	84.8			44.4
Settlements	—			(10.0		)
Lapse of statute	(10.8		)	(4.6		)
Balance at end of year	$	325.8		$	251.8

These unrecognized tax benefits relate primarily to issues common among multinational corporations. If recognized, unrecognized tax benefits of approximately $300.8 million would have a net impact on the effective tax rate. We account for interest and penalties related to uncertain tax positions as part of our provision for income taxes. Accrued interest at December 31, 2015 and 2014 is approximately $32.6 million and $28.1 million, respectively.

We have recorded changes in the liability for unrecognized tax benefits for current and prior year tax positions related to ongoing income tax audits in various taxing jurisdictions. The liability for unrecognized tax benefits is expected to increase in the next twelve months relating to operations occurring in that period. Any settlements of examinations with taxing authorities or statute of limitations expirations would likely result in a decrease in our liability for unrecognized tax benefits and a corresponding increase in taxes paid or payable and/or a decrease in income tax expense. It is reasonably possible that the amount of the liability for unrecognized tax benefits could change by a significant amount during the next twelve-month period as a result of settlements or statute of limitations expirations. Finalizing examinations with the relevant taxing authorities can include formal administrative and legal proceedings and, as a result, it is difficult to estimate the timing and range of possible change related to the Company’s unrecognized tax benefits. An estimate of the range of the possible change cannot be made until issues are further developed or examinations close. Our estimates of tax benefits and potential tax benefits may not be representative of actual outcomes, and variation from such estimates could materially affect our financial statements in the period of settlement or when the statutes of limitations expire.

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Collaboration Agreements

12 Months Ended

Dec. 31, 2015

Collaboration Agreements

Collaboration Agreements

Collaboration Agreements

We enter into collaborative arrangements for the research and development, license, manufacture and/or commercialization of products and/or product candidates. In addition, we also acquire products, product candidates and research and development technology rights and establish research and development collaborations with third parties to enhance our strategic position within our industry by strengthening and diversifying our research and development capabilities, product pipeline and marketed product base. These arrangements may include non-refundable, upfront payments, payments for options to acquire rights to products and product candidates and other rights, as well as potential development, regulatory and commercial performance milestone payments, cost sharing arrangements, royalty payments, profit sharing and equity investments. These arrangements could include obligations for us to make equity investments in the event of an initial public offering of equity by our partners. The activities under these collaboration agreements are performed with no guarantee of either technological or commercial success. Although we do not consider any individual alliance to be material, certain of the more notable alliances are described below. Summarized financial information related to our alliances is presented in tabular format after the description of alliances:

Acceleron Pharma (Acceleron): We have worldwide strategic collaboration agreements with Acceleron for the joint development and commercialization of sotatercept (ACE-011) and luspatercept (ACE-536). Sotatercept is currently in phase II studies for treatment of renal anemia, beta-thalassemia and MDS, and luspatercept is currently in phase II studies for beta-thalassemia and MDS.

On January 1, 2013 we became responsible for the payment of all development costs related to sotatercept and luspatercept and have recognized development expenses as research and development expense as they were incurred.

With respect to the sotatercept program, Acceleron is eligible to receive up to $367.0 million in development, regulatory approval and sales-based milestones and up to an additional $348.0 million for each of three specific discovery stage programs. We also agreed to co-promote the developed products in North America. Acceleron will receive tiered royalties on worldwide net sales upon the commercialization of a development compound.

With respect to the luspatercept program, we have an exclusive, worldwide, royalty-bearing license to luspatercept and future Acceleron products for the treatment of anemia. We also agreed to co-promote the products in the United States, Canada and Mexico. Acceleron is eligible to receive development, regulatory approval and sales-based milestones of up to $217.5 million for luspatercept and up to an additional $170.8 million for the first discovery stage program, $148.8 million for the second discovery stage program and $125.4 million for each additional discovery stage program thereafter. Acceleron will receive tiered royalties on worldwide net sales upon the commercialization of a development compound.

The sotatercept agreement may be terminated by us, at our sole discretion, at any time or by either party, among other things, upon a material breach by the other party. The luspatercept agreement may be terminated by us, at our sole discretion, after completion of the initial phase II clinical trial or by either party, among other things, upon a material breach by the other party.

Agios Pharmaceuticals, Inc. (Agios):  During 2010, we entered into a discovery and development collaboration and license agreement with Agios that focuses on cancer metabolism targets and the discovery, development and commercialization of associated therapeutics. We have an exclusive option to license any potential products that result from the Agios cancer metabolism research platform through the end of phase I clinical trials.

With respect to each product that we choose to license, Agios could receive up to approximately $120.0 million upon achievement of certain milestones and other payments plus royalties on worldwide sales, and Agios may also participate in the development and commercialization of certain products in the United States. In December 2014, we elected to extend the collaboration and license agreement for an additional year for a payment of $20.0 million. Our option to license products will terminate on April 14, 2016.

In June 2014, we exercised our option to license AG-221 from Agios on an exclusive worldwide basis, with Agios retaining the right to conduct a portion of commercialization activities for AG-221 in the United States. AG-221 is currently in a phase I study in patients that present an isocitrate dehydrogenase-2 (IDH2) mutation with advanced hematologic malignancies, including acute myeloid leukemia (AML).

In January 2015, we exercised our option, subject to applicable regulatory approvals which were subsequently achieved, to an exclusive license from Agios to AG-120 outside the United States, with Agios retaining the right to conduct development and commercialization within the United States. AG-120 is an orally available, selective inhibitor of the mutated isocitrate dehydrogenase-1 (IDH1) protein for the treatment of patients with cancers that harbor an IDH1 mutation. AG-120 is currently being evaluated in two phase I dose escalation trials, one in advanced hematological malignancies and the other in advanced solid tumors.

In April 2015, we and Agios entered into a new joint worldwide development and profit share collaboration for AG-881. AG-881 is a small molecule that has shown in preclinical studies to fully penetrate the blood brain barrier and inhibit IDH1 and IDH2 mutant cancer cells. Under the terms of the AG-881 collaboration, Agios received an initial payment of $10.0 million and is eligible to receive contingent payments of up to $70.0 million based on the attainment of specified regulatory goals. The upfront payment to Agios was accounted for as $9.0 million of upfront research and development collaboration expense and $1.0 million of prepaid manufacturing rights recorded on the balance sheet. We and Agios will jointly collaborate on the worldwide development program for AG-881, sharing development costs equally. The two companies will share profits equally, with Celgene recording commercial sales worldwide. Agios will lead commercialization in the U.S. with both companies sharing equally in field-based commercial activities, and we will lead commercialization ex-U.S. with Agios providing one third of field-based commercial activities in the major EU markets.

Epizyme Inc. (Epizyme): In July 2015 we entered into an amendment and restatement of the collaboration and license agreement dated April 2, 2012 with Epizyme (the “Amended Agreement”). Under the original agreement, we had an exclusive license, for all countries other than the United States, to small molecule HMT inhibitors targeting DOT1L, including pinometostat (EPZ-5676), and an option, on a target-by-target basis, to exclusively license, for all countries other than the United States, rights to small molecule HMT inhibitors targeting any other HMT targets. Under the Amended Agreement:

• We retain our exclusive license to small molecule HMT inhibitors targeting DOT1L outside of the United States, including pinometostat (EPZ-5676),

• We have narrowed our option rights to HMT inhibitors targeting three predefined targets (the “Option Targets”),

• The exclusive licenses to HMT inhibitors targeting two of the Option Targets that we may acquire have been expanded to include the United States, with the exclusive license to the third Option Target continuing to be for all countries other than the United States,

• Our option period has been extended for each of the Option Targets and is exercisable at the time of Epizyme's IND filing for an HMT inhibitor targeting the applicable Option Target,

• Epizyme may complete phase I clinical trials as to each Option Target following our exercise of our option at IND filing. If Epizyme chooses not to complete phase I clinical trials to an Optioned Target, future milestones and royalties on products developed for such Option Targets will be reduced.

Under the terms of the Amended Agreement, we made a $10.0 million payment to Epizyme. In addition, Epizyme may earn up to $75.0 million in development milestone payments, up to $365.0 million in regulatory milestone payments and up to $170.0 million in sales milestone payments related to the Option Targets. For the DOT1L program, Epizyme remains eligible to earn $35.0 million in clinical development milestone payments and up to $100.0 million in regulatory milestone payments. Epizyme is also entitled to tiered royalties ranging from the mid-single digits to the mid-teens on annual net product sales in our territory, subject to reductions in specified circumstances.

The Amended Agreement extends the research and development collaboration for at least an additional three years until July 8, 2018, subject to our exercise of our options at IND filing. The Amended Agreement will expire on a product-by-product and country-by-country basis on the date of the expiration of the applicable royalty term with respect to each licensed product in each country and in its entirety upon the expiration of all applicable royalty terms for all licensed products in all countries. We have the right to terminate the Amended Agreement in its entirety or with respect to one or more Optioned Targets upon 120 days’ notice. Upon the expiration of the royalty term of a particular license product, we will have a fully paid-up, royalty-free license to use Epizyme intellectual property to manufacture, market, use and sell such licensed products in our territory.

Sutro Biopharma, Inc. (Sutro): In December 2012, we entered into a collaboration and license agreement with Sutro for the development of an antibody drug conjugate (ADC) and a bispecific antibody construct (BAC).  Sutro controls and conducts initial development activities.  We have the right to select one ADC among a number of different sequence-payload combinations and positional variants, and one BAC.  Sutro will provide adequate quantities of any selected ADC and selected BAC to allow us to conduct all necessary preclinical studies, including toxicology and pharmacokinetics studies.

Under the terms of the 2012 agreement, Sutro received payments totaling $35.0 million, which included an equity investment and other rights. In addition, the 2012 collaboration and license agreement includes certain development and regulatory milestones that could total up to $204.0 million for a selected ADC if approved in multiple indications, and up to $279.0 million for a selected BAC if approved in multiple indications, as well as tiered royalties based on annual net sales of licensed products.

In September 2014, we entered into a second collaboration and license agreement with Sutro to jointly develop up to six prioritized anti-cancer BACs and/or ADCs directed primarily to immune-oncology targets. Sutro will control and conduct initial development activities. We have the right to advance any BAC and/or ADC to investigational new drug (IND)-enabling studies or to designate it as a development candidate, and in either case, we would then have the sole right and responsibility for development activities, although Sutro would still have certain limited manufacturing and supply obligations.

Under the terms of the 2014 agreement, Sutro received payments totaling $95.0 million, which includes an equity investment that increases our ownership to approximately 15%, rights with respect to manufacturing and supply of BAC and ADC development candidates, and an option to acquire all of the outstanding equity of Sutro based on a pre-specified valuation procedure. The option is exercisable beginning September 2016 and expires upon the termination of the research term (as extended).

For a future one-time payment, we have the right to obtain access to Sutro’s proprietary protein expression platform to use in conjunction with our intellectual property. Additionally, we have the right to have Sutro evaluate the performance of certain monospecific ADCs directed against up to five non-natural amino acid targets, and reengineer, express, and provide antibodies which incorporate a single non-natural amino acid sequence in a number of preferred locations.

The research term of the collaboration and license agreement is three years, with an extension available for an additional one-and-a-half years for a payment of an additional fee. We have worldwide commercialization rights for development candidates in which at least one binding domain is directed to a certain undisclosed target, plus the first development candidate which does not include at least one binding domain directed to that certain undisclosed target but which achieves IND clearance in the U.S. For all other development candidates, Sutro has U.S. rights, while we have all ex-U.S. rights.

Under the terms of the 2014 agreement, Sutro is eligible to receive research and manufacturing milestones of up to $75.0 million, clinical development and regulatory approval milestones of up to $275.0 million for each compound selected under the collaboration if approved in multiple indications, as well as tiered royalties based on annual net sales of licensed products.

The collaboration and license agreement may be terminated by us at our discretion on a program-by-program basis upon 120 days prior written notice, or by either party for material breach, intellectual property challenge, or bankruptcy by the other party. With certain exceptions, the collaboration and license agreement expires in its entirety upon the expiration of all applicable royalty terms under the Agreement.

bluebird bio, Inc. (bluebird):  In June 2015, we amended and restated the March 2013 collaboration agreement with bluebird. The amended and restated collaboration will focus on the discovery, development and commercialization of novel disease-altering gene therapy product candidates targeting B-cell maturation antigen (BCMA). BCMA is a cell surface protein that is expressed in normal plasma cells and in most multiple myeloma cells, but is absent from other normal tissues. The collaboration applies gene therapy technology to modify a patient’s own T-cells, known as chimeric antigen receptor (CAR) T-cells, to target and destroy cancer cells that express BCMA. We have an option to license any anti-BCMA products resulting from the collaboration after the completion of a phase I clinical study by bluebird.

Under the amended and restated collaboration agreement we made an additional $25.0 million payment for bluebird to develop the lead anti-BCMA product candidate (bb2121) through a phase I clinical study and to develop next-generation anti-BCMA product candidates. The payment was recorded as prepaid research and development on the balance sheet and is being recognized as expense as development work is performed. Upon exercising our option to license a product and achievement of certain milestones, we may be obligated to pay up to $230.0 million per licensed product in aggregate potential option fees and clinical and regulatory milestone payments. bluebird also has the option to participate in the development and commercialization of any licensed products resulting from the collaboration through a 50/50 co-development and profit share in the United States in exchange for a reduction of milestone payments. Royalties would also be paid to bluebird in regions where there is no profit share, including in the United States, if bluebird declines to exercise their co-development and profit sharing rights.

We have the ability to terminate the collaboration at our discretion upon 90 days written notice to bluebird.  If a product is optioned, the parties will enter into a pre-negotiated license agreement and potentially a co-development agreement should bluebird exercise its option to participate in the development and commercialization in the United States.  The license agreement, if not terminated sooner, would expire upon the expiration of all applicable royalty terms under the agreement with respect to the particular product, and the co-development agreement, if not terminated sooner, would expire when the product is no longer being developed or commercialized in the United States.  Upon the expiration of a particular license agreement, we will have a fully paid-up, royalty-free license to use bluebird intellectual property to manufacture, market, use and sell such licensed product.

FORMA Therapeutics Holdings, LLC (FORMA): In April 2013, we entered into a collaboration agreement with FORMA to discover, develop and commercialize drug candidates to regulate protein homeostasis targets. Protein homeostasis, which is important in oncology, neurodegenerative and other disorders, involves a tightly regulated network of pathways controlling the biogenesis, folding, transport and degradation of proteins.

The collaboration was launched with an upfront payment that enables us to evaluate selected targets and lead assets in protein homeostasis pathways during the pre-clinical phase. Based on such evaluation, we have the right to obtain exclusive licenses with respect to the development and commercialization of multiple drug candidates outside of the United States, in exchange for research and early development payments of up to approximately $200.0 million to FORMA. Under the terms of the collaboration agreement, FORMA is incentivized to advance the full complement of drug candidates through phase I, while Celgene is responsible for all further global clinical development for each licensed candidate. FORMA is eligible to receive up to an additional $315.0 million in potential payments based upon development, regulatory and sales objectives for the first ex-U.S. license. FORMA is also eligible to receive potential payments for successive licenses, which escalate for productivity, increasing up to a maximum of an additional $430.0 million per program. In addition, FORMA will receive royalties on ex-U.S. sales and additional payments if multiple drug candidates reach defined cumulative sales objectives. The collaboration agreement includes provisions for Celgene to obtain rights with respect to development and commercialization of drug candidates inside the United States in exchange for additional payments.

Under the collaboration, the parties perform initial research and development for a term of four years. If, during such research term, a drug candidate meets certain criteria, then the parties enter into a pre-negotiated license agreement and the collaboration continues until all license agreements have expired and all applicable royalty terms under the collaboration with respect to the particular products have expired. Each license agreement, if not terminated sooner, expires upon the expiration of all applicable royalty terms under such agreement. Upon the expiration of each license agreement, we will have an exclusive, fully-paid, royalty-free license to use the applicable FORMA intellectual property to manufacture, market, use and sell the product developed under such agreement outside of the United States. As of December 31, 2015, we have entered into three such license agreements with FORMA and paid the applicable upfront payments under such license agreements totaling $68.0 million.

On March 21, 2014, we entered into a second collaboration arrangement with FORMA, pursuant to which FORMA granted us an option, for an additional fee, to license the rights to select current and future FORMA drug candidates during a term of three and one half years. We agreed to pay an upfront payment of $225.0 million. In addition, with respect to each subsequently licensed drug candidate, we have the obligation to pay designated amounts when certain development, regulatory and sales milestone events occur, with such amounts being variable and contingent on various factors. With respect to each licensed drug candidate, we assume responsibility for all global development activities and costs after completion of phase I clinical trials. FORMA retains U.S. rights to all such licensed assets, including responsibility for manufacturing and commercialization.

Under this collaboration arrangement, we also have an option to enter into up to two additional collaborations with successive terms of two years each for additional payments totaling approximately $375.0 million. If we exercise our option to enter into both of these additional collaborations, we will receive an exclusive option to acquire FORMA, including the U.S. rights to all licensed drug candidates, and worldwide rights to other wholly owned assets within FORMA at that time. In April, 2015, we entered into the first license agreement with FORMA under the second collaboration and made a $20.0 million upfront payment for the license.

Acetylon Pharmaceuticals, Inc. (Acetylon): In July 2013, we entered into a collaboration and option agreement with Acetylon. Under the agreement, the parties will support the development of Acetylon's portfolio of oral, selective HDAC inhibitors in oncology, hematology, immunology and neurologic disease indications. In addition, we have rights to receive certain research and development services from Acetylon and an exclusive right to acquire Acetylon at a later date at a purchase price based upon future independent company valuations.

The collaboration focuses on the continued clinical advancement of Acetylon's lead candidate, ACY-1215, an HDAC6 inhibitor being developed for hematological malignancies, ACY-738 for neurological diseases, an HDAC1/2 inhibitor and a yet unnamed project, spanning cancer and non-cancer disease indications. Under the agreement, we made an upfront payment to Acetylon, which included a fee for entering into the collaboration, fees for the exclusive right to acquire Acetylon and the rights to receive certain research and development services from Acetylon. During the term of the agreement, Acetylon will retain control of its drug development programs. If we exercise our right to acquire Acetylon, in addition to the purchase price based upon independent company valuations to be paid at the time of the acquisition, Acetylon shareholders will be eligible to receive potential future milestone payments for approvals, or additional indications, of drugs developed by Acetylon and for accomplishing defined sales targets. If all the milestones are achieved, the aggregate amount of the milestone payments would be $1.100 billion.

In August 2015, we entered into an amendment to the agreement with Acetylon to extend the expiration date of the agreement to May 2, 2016 and remove our right to further extend the expiration date. Further, we have the ability to terminate the agreement at our discretion upon written notice to Acetylon.

OncoMed Pharmaceuticals, Inc. (OncoMed): On December 2, 2013, we entered into a collaboration agreement to jointly develop and commercialize up to six anti-cancer stem cell (CSC) product candidates from OncoMed’s biologics pipeline, including demcizumab (OMP-21M18, Anti-DLL4). OncoMed will control and conduct initial clinical studies. We will have an option to license worldwide rights to up to six novel anti-CSC therapeutic candidates commencing upon the completion of enrollment of patients in a phase I trial (and with respect to demcizumab, a phase II trial) and ending 60 days after delivery by OncoMed of the applicable data package for each therapeutic candidate, subject to certain extensions.  We will also have research, development and commercialization rights to small molecule compounds in another cancer stem cell pathway, with OncoMed eligible to receive milestones and royalties on any resulting products.

Demcizumab is currently in multiple phase Ib, phase Ib/II, and phase II clinical studies in combination with standard-of-care therapeutics, including a trial in patients with first-line advanced pancreatic cancer. Subsequent to the exercise of our option rights, the parties will co-develop demcizumab and share global development costs on a one-third OncoMed and two-thirds Celgene split. Outside the United States, we would lead development and commercialization efforts, with OncoMed eligible to receive milestones and tiered royalties on sales outside the United States. For sales in the United States, OncoMed and Celgene would share profits equally.

In addition to demcizumab, the collaboration includes up to five phase Ia, preclinical- or discovery-stage biologics programs: OncoMed’s anti-DLL4/VEGF bispecific antibody and up to four additional biologics programs targeting either the RSPO-LGR CSC pathway or another CSC pathway. We have exclusive options on these programs during or after completion of certain phase I clinical trials to be conducted by OncoMed, which if exercised, contain U.S. profit sharing and co-commercialization terms, plus one-third OncoMed and two-thirds Celgene global development cost-sharing and royalties outside the profit-sharing territory.

The collaboration agreement also includes option exercise payments and payments for achievement of development, regulatory and commercial milestones, paid on a per-program basis. For the demcizumab program, these contingent payments could total up to approximately $790.0 million, and include a payment for achievement of predetermined safety criteria in phase II clinical trials, which was achieved on December 31, 2015 resulting in a $70.0 million payment in February 2016. For the anti-DLL4/VEGF bispecific antibody program, contingent payments could total up to $505.0 million. For the other four programs, each program is eligible for up to approximately $440.0 million of contingent payments. OncoMed could also receive more than $100.0 million in contingent payments for the small molecule program.

The collaboration agreement may be terminated by us on a program-by-program basis upon 120 days prior written notice before exercise of that program option, and after such program option exercise, by either party for material breach by the other party. With certain exceptions, the collaboration agreement expires upon the later of (a) the last-to-expire option term and (b) if one or more options are exercised, the termination or expiration of the last to expire agreement with respect to such exercised option.

NantBioScience, Inc. (NantBioScience): In January 2014, we entered into a collaboration agreement with NantBioScience, an entity controlled by Dr. Patrick Soon-Shiong in which Celgene contributed $75.0 million of cash, the rights to the future royalty stream based on net sales of certain products of Active Biomaterials, LLC, another entity controlled by Dr. Patrick Soon-Shiong, and licenses to two nab^® product candidates. In return, Celgene received a 14 percent preferred equity ownership in NantBioScience, an option to license a certain number of product candidates developed by NantBioScience, including the two nab^® product candidates that Celgene is licensing to NantBioScience, and the parent company of NantBioScience assumed, and agreed to pay and satisfy when due, our obligation to pay The Chan Soon-Shiong Institute for Advanced Health (CSS Institute) $50.0 million in contingent, matching contributions. The transaction became effective in March 2014. Unless Celgene terminates the collaboration earlier, in Celgene’s sole discretion upon 30 days written notice, the collaboration will continue until the earliest to occur of: (a) Celgene licensing four NantBioScience product candidates; (b) NantBioScience presenting data packages for ten product candidates; and (c) the date which is 10 years after the effective date. Regardless of any termination of the collaboration, the 14 percent preferred equity ownership in NantBioScience and the assumption of the $50.0 million in contingent, matching contributions by the parent company of NantBioScience remain in effect. We performed a valuation of the components of the transaction and allocated the consideration transferred as follows: $50.0 million for the collaboration agreement upfront expense; $25.0 million related to the settlement of contingent matching contributions, and; $90.0 million related to the equity ownership in NantBioScience.

AstraZeneca PLC (AstraZeneca): In April 2015, we entered into a strategic collaboration agreement with MedImmune Limited (MedImmune), a subsidiary of AstraZeneca, to develop and commercialize MEDI4736, a novel anti-PD-L1 monoclonal antibody, for hematologic malignancies. The agreement provides for a negotiation period to expand the agreement for other immuno-therapeutics. Under the terms of the agreement, we made an upfront payment of $450.0 million to MedImmune. We lead clinical development across all new clinical trials within the collaboration and are responsible for all costs associated with such trials until December 31, 2016, after which we will be responsible for 75 percent of those costs. We also will be responsible for the global commercialization of approved MEDI4736 indications in hematology, and will receive royalty rates starting at 70 percent of worldwide sales from all uses in hematology. Royalty rates will decrease gradually to 50 percent over a period of 4 years after the start of commercial sales. The agreement may be terminated at our discretion upon nine months’ prior written notice to MedImmune, and by either party upon material breach of the other party, subject to cure periods. The agreement, if not terminated sooner, expires upon the expiration of all applicable royalty terms under such agreement.

Lycera Corp. (Lycera): In June 2015, we entered into a collaboration and option agreement with Lycera. Under the agreement, the parties will support the development of Lycera’s portfolio of immune modulator assets, including (1) oral agonists that target RORy, a master control switch of immune system activation, for the potential treatment of a broad range of cancers, and (2) LYC-30937, an oral gut-directed ATPase modulator currently in phase I clinical studies. In addition, we have an exclusive right to acquire Lycera at a later date at a purchase price based upon future independent company valuations.

Lycera has developed orally bioavailable RORy agonists that have demonstrated single agent therapeutic activity in multiple animal models of cancer. Ex-vivo treatment with RORy agonist compounds has been shown to enhance the therapeutic benefit of adoptive T-cell therapy by improving both immune cell persistence and activation. Development of LYC-30937 is focused on the treatment of inflammatory bowel disease, with the goal of delivering significant disease improvement without global immune suppression. Under the collaboration, Lycera also will continue to advance its other programs, including a Rho-associated protein kinase 2 (ROCK2) inhibitor.

Under the terms of the agreement, we made an upfront payment of $82.5 million to Lycera. We received an exclusive option for an additional fee to license Lycera’s portfolio of ex-vivo RORy agonist compounds, an equity interest and an exclusive right to acquire Lycera. If we exercise the acquisition right, Lycera shareholders will be also eligible to receive future success-based milestone payments of up to $190.0 million. The upfront payment to Lycera was accounted for as $69.5 million of upfront collaboration payment included in research and development expense and $13.0 million as non-current assets consisting of $10.0 million for an equity investment and $3.0 million for an option to acquire the remaining shares outstanding.

The agreement has an initial term of 3 years and may be terminated earlier at our discretion upon 6 months’ prior written notice to Lycera and by either party upon material breach of the other party, subject to cure periods. In December 2015, we entered into a license agreement with Lycera, under which Lycera granted to us an exclusive license for Lycera’s portfolio of novel ex vivo RORy agonist compounds and we made a $17.5 million upfront payment which is included in research and development expense.

Juno Therapeutics, Inc. (Juno): In June 2015, we announced a collaboration and investment agreement with Juno for the development and commercialization of immunotherapies for cancer and autoimmune diseases. The collaboration and investment agreement became effective on July 31, 2015 after an early termination of the Hart-Scott-Rodino Antitrust waiting period. Under the terms of the agreement, we have the option to be the commercialization partner for Juno’s oncology and cell therapy auto-immune product candidates, including Juno’s CD19 and CD22 directed CAR T-cell product candidates. For Juno-originated programs co-developed under the collaboration, (a) Juno will be responsible for research and development in North America and will retain commercialization rights in those territories, (b) we will be responsible for development and commercialization in the rest of the world, and will pay Juno a royalty on sales in those territories, and (c) we have certain co-promotion options for global profit sharing arrangements under which the parties will share worldwide expenses and profits equally, except in China.

Juno will have the option to enter into co-development and co-commercialization arrangements on certain Celgene-originated development candidates that target T-cells. For any such Celgene-originated programs co-developed under the collaboration, (a) the parties will share global costs and profits, with 70 percent allocated to us and 30 percent allocated to Juno, and (b) we will lead global development and commercialization, subject to a Juno co-promote option in the US and certain EU territories.

Upon closing, we made a $1.000 billion payment to Juno and received 9.1 million shares of Juno common stock, amounting to approximately 9 percent of Juno's outstanding common stock. The value of our investment in Juno common stock of $424.9 million was recorded as an available-for sale marketable security based on the market price of the stock on the date of closing and the remaining portion of the $1.000 billion payment, which consists of both a $150.0 million upfront payment and a $425.1 million premium paid on our equity investment, was recorded to research and development expense.

The collaboration agreement has an initial term of ten years. If the parties enter into any pre-negotiated license or co-commercialization agreement during the initial term, the collaboration agreement will continue until all such license and co-commercialization agreements have expired. The collaboration agreement may be terminated at our discretion upon 120 days prior written notice to Juno and by either party upon material breach of the other party, subject to cure periods.

Nurix, Inc. (Nurix): In September 2015, we entered into a strategic collaboration agreement with Nurix for the discovery, development and commercialization of novel small molecule therapeutics in oncology and inflammation and immunology. Nurix will work exclusively with us in these therapeutic areas to advance new therapies that function through the ubiquitin proteasome system (UPS) to modulate protein homeostasis, a fundamental cellular process controlling protein levels.

Under the terms of the collaboration, we made an upfront payment to Nurix of $149.8 million, plus an equity investment of $17.0 million, which amounted to approximately 11 percent of Nurix outstanding equity, for an option to license future programs. The option term for each of these programs is the earlier of either (a) 45 days after the delivery of a phase I data package, or (b) four years, which period we may extend twice for the payment of additional fees. During the term, Nurix may focus on investigating E3 ubiquitin ligases and E2 conjugating enzymes to identify the most promising drug discovery programs for use in oncology or inflammation and immunology therapeutic applications. Nurix will control and is responsible for all drug discovery and development activities through the end of phase I clinical trials.

We may opt to license global development and commercialization rights to a program in exchange for an option fee, potential clinical, regulatory and sales milestone payments totaling up to $405.0 million, as well as future tiered single-digit to low double-digit royalties on global sales. We would also have worldwide rights to collaboration products, with the exception of certain collaboration products for which Nurix would retain U.S. development and commercialization rights. These rights include the opportunity for the companies to co-develop and co-commercialize up to two programs in the U.S., sharing profits and losses equally, and we would retain ex-US rights, in exchange for an option fee, milestone payments and royalties on ex-U.S. sales on a program-by-program basis. For candidates not optioned by us under the collaboration, Nurix would retain worldwide rights.

Other Collaboration Arrangements in 2015:    In addition to the collaboration arrangements described above, we entered into a number of collaborative arrangements during 2015 that include the potential for future milestone payments of up to an aggregate $120.0 million related to the attainment of specified developmental, regulatory and sales milestones over a period of several years. Our obligation to fund these efforts is contingent upon our continued involvement in the programs and/or the lack of any adverse events which could cause the discontinuance of the programs.

Summarized financial information related to our collaboration agreements is presented below:

		Year ended December 31,										As of December 31,1
		Research and Development Expense
		Upfront Fees		Milestones		Extension/ Termination of Agreements		Amortization of Prepaid Research and Development		Equity Investments Made DuringPeriod		Intangible Asset Balance		Equity Investment Balance		Percentage of Outstanding Equity
Acceleron	2015	$	—	$	—	$	—	$	—	$	—	$	—	$	224.9	14	%
	2014	—		—		—		—		52.4		—		179.7		14	%
	2013	—		17.0		—		—		10.0
	2012 and prior	70.0		27.5		—		—		30.5
Acetylon	2015	—		—		—		20.2		15.0		0.2		30.0		14	%
	2014	—		—		—		15.3		—		20.4		25.0		10	%
	2013	50.0		—		—		4.3		10.0
	2012 and prior	—		—		—		—		15.0
Agios	2015	9.0		—		—		—		—		1.0		340.4		13	%
	2014	—		—		20.0		—		38.3		—		587.4		14	%
	2013	—		—		20.0		—		12.8
	2012 and prior	121.2		—		20.0		—		37.5
AstraZeneca	2015	450.0		—		—		—		—		—		N/A		N/A
bluebird	2015	—		—		—		4.9		—		20.2		N/A		N/A
	2014	—		—		—		0.1		—		0.1		N/A		N/A
	2013	74.7		—		—		—		—
Epizyme	2015	—		—		10.0		—		—		—		58.9		9	%
	2014	—		—		—		—		9.9		—		69.3		11	%
	2013	—		25.0		—		—		1.0
	2012	65.0		—		—		—		25.0
FORMA	2015	59.0		—		—		—		—		0.1		N/A		N/A
	2014	225.0		—		—		0.1		—		0.1		N/A		N/A
	2013	52.8		—		—		—		—
Juno	2015	575.1		—		—		—		424.9		—		401.8		9	%
Lycera	2015	87.0		—		—		—		10.0		3.0		10.0		8	%
NantBioScience2	2015	—		—		—		—		—		—		90.0		13	%
	2014	50.0		—		—		—		90.0		—		90.0		14	%
Nurix	2015	149.8		—		—		—		17.0		0.2		17.0		11	%
OncoMed	2015	2.5		70.0		—		—		—		—		33.1		5	%
	2014	2.5		—		—		—		—		—		32.0		5	%
	2013	155.0		—		—		—		22.2

		Year ended December 31,					As of December 31,1
		Research and Development Expense
		Upfront Fees	Milestones	Extension/ Termination of Agreements	Amortization of Prepaid Research and Development	Equity Investments Made During Period	Intangible Asset Balance	Equity Investment Balance	Percentage of Outstanding Equity
Sutro	2015	—	—	—	4.8	—	22.9	17.6	16	%
	2014	72.6	—	—	0.2	11.9	12.8	17.6	15	%
	2013	—	—	—	2.1	1.7
	2012	26.3	—	—	0.2	4.0
Other Collaboration Arrangements	2015	69.8	8.0	8.1	0.9	50.0	25.0	105.4	N/A
	2014	103.5	8.3	—	7.5	55.7	34.4	132.7	N/A
	2013	243.3	1.0	—	0.9	71.7

¹ Year-end balance and percentage of outstanding equity are presented for the current and prior year.

²$25.0 million of expense related to the settlement of contingent matching contributions was also recognized in 2014 at the inception of the collaboration agreement with NantBioScience and included in Selling, General and Administrative expense.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Contingent Value Rights: In connection with the acquisition of Abraxis in 2010, CVRs were issued under a Contingent Value Rights Agreement, or CVR Agreement, entered into between Celgene and American Stock Transfer & Trust Company, LLC, as trustee. The CVRs are registered for trading on the NASDAQ Global Market under the symbol "CELGZ." The fair value of the liability of the Company related to payments under the CVR Agreement are subject to fluctuation based on trading prices for the publicly traded CVRs. Subsequent to the Abraxis Acquisition Date, we measured the contingent consideration represented by the CVRs at fair value with changes in fair value recognized in operating earnings. The fair value of our liability related to the CVRs was $51.9 million at the end of 2015 compared to $136.3 million at the end of 2014.

Each holder of a CVR is entitled to receive a pro rata portion, based on the number of CVRs then outstanding, of each of the following contingent cash payments:

• Milestone Payment #1.$250.0 million upon FDA approval of ABRAXANE^® for use in the treatment of NSCLC if such approval permits us to market ABRAXANE^® with FDA approval that includes a progression-free survival, or PFS, claim, but only if this milestone is achieved no later than the fifth anniversary of the Merger.

• Milestone Payment #2.$400.0 million (if achieved no later than April 1, 2013) or $300.0 million (if achieved after April 1, 2013 and before the fifth anniversary of the Merger) upon FDA approval of ABRAXANE^® for use in the treatment of pancreatic cancer, if such approval permits us to market ABRAXANE^® with FDA approval that includes an overall survival claim.

• Net Sales Payments.  For each full one-year period ending December 31 during the term of the CVR Agreement, which we refer to as a net sales measuring period (with the first net sales measuring period beginning January 1, 2011 and ending December 31, 2011):

◦ 2.5% of the net sales of ABRAXANE^® and the Abraxis pipeline products that exceed $1.000 billion but are less than or equal to $2.000 billion for such period, plus

◦ an additional amount equal to 5% of the net sales of ABRAXANE^® and the Abraxis pipeline products that exceed $2.000 billion but are less than or equal to $3.000 billion for such period, plus

◦ an additional amount equal to 10% of the net sales of ABRAXANE^® and the Abraxis pipeline products that exceed $3.000 billion for such period.

No payments will be due under the CVR Agreement with respect to net sales of ABRAXANE^® and the Abraxis pipeline products after December 31, 2025, which we refer to as the net sales payment termination date, unless net sales for the net sales measuring period ending on December 31, 2025 are equal to or greater than $1.000 billion, in which case the net sales payment termination date will be extended until the last day of the first net sales measuring period subsequent to December 31, 2025 during which net sales of ABRAXANE^® and the Abraxis pipeline products are less than $1.000 billion or, if earlier, December 31, 2030.

Milestone Payment #1 update: In October 2012, the FDA approved ABRAXANE^® for the first-line treatment of locally advanced or metastatic NSCLC, in combination with carboplatin, in patients who are not candidates for curative surgery or radiation therapy. The FDA approval was based on tumor response rates and did not result in the use of a marketing label that includes a progression-free survival claim, and accordingly, the CVR Milestone Payment #1, as described above, has not been achieved. This approval resulted in the related $1.172 billion intangible asset obtained from the Abraxis acquisition being reclassified in October 2012 from an acquired IPR&D intangible to an acquired developed product rights intangible asset and amortization commenced in October 2012.

Milestone Payment #2 update: In September 2013, the FDA approved ABRAXANE^® for use in the treatment of pancreatic cancer, permitting us to market ABRAXANE^® with a label that includes an overall survival claim. This approval resulted in the achievement of milestone #2 and the subsequent payment of $300.0 million to CVR holders in October 2013.

Leases:  We lease offices and research facilities under various operating lease agreements in the United States and international markets. We also lease automobiles and certain equipment in these same markets. At December 31, 2015, the non-cancelable lease terms for the operating leases expire at various dates between 2016 and 2025 and include renewal options. In general, the Company is also required to reimburse the lessors for real estate taxes, insurance, utilities, maintenance and other operating costs associated with the leases.

Future minimum lease payments under non-cancelable operating leases as of December 31, 2015 are:

	Operating Leases
2016	$	56.1
2017	47.9
2018	35.1
2019	24.1
2020	19.6
Thereafter	49.5
Total minimum lease payments	$	232.3

Total rental expense under operating leases was approximately $66.2 million in 2015, $62.2 million in 2014 and $50.9 million in 2013.

Lines of Credit: We maintain lines of credit with several banks to support our hedging programs and to facilitate the issuance of bank letters of credit and guarantees on behalf of our subsidiaries. Lines of credit supporting our hedging programs as of December 31, 2015 allowed us to enter into derivative contracts with settlement dates through 2018. As of December 31, 2015, we have entered into derivative contracts with net notional amounts totaling $9.275 billion. Lines of credit facilitating the issuance of bank letters of credit and guarantees as of December 31, 2015 allowed us to have letters of credit and guarantees issued on behalf of our subsidiaries totaling $101.7 million.

Other Commitments:  Our obligations related to product supply contracts totaled $183.7 million at December 31, 2015. In addition, we have committed to invest an aggregate $20.4 million in an investment fund, which is callable at any time. We are also committed to pay the remaining $4.0 million balance due from our acquisition of a manufacturing facility in Switzerland.

Collaboration Arrangements:  We have entered into certain research and development collaboration agreements, as identified in Note 17 above, with third parties that include the funding of certain development, manufacturing and commercialization efforts with the potential for future milestone and royalty payments upon the achievement of pre-established developmental, regulatory and/or commercial targets. Our obligation to fund these efforts is contingent upon continued involvement in the programs and/or the lack of any adverse events which could cause the discontinuance of the programs. Due to the nature of these arrangements, the future potential payments are inherently uncertain, and accordingly no amounts have been recorded for the potential future achievement of these targets in our accompanying Consolidated Balance Sheets at December 31, 2015 and 2014.

Contingencies:  We believe we maintain insurance coverage adequate for our current needs. Our operations are subject to environmental laws and regulations, which impose limitations on the discharge of pollutants into the air and water and establish standards for the treatment, storage and disposal of solid and hazardous wastes. We review the effects of such laws and regulations on our operations and modify our operations as appropriate. We believe we are in substantial compliance with all applicable environmental laws and regulations.

We have ongoing customs, duties and VAT examinations in various countries that have yet to be settled. Based on our knowledge of the claims and facts and circumstances to date, none of these matters, individually or in the aggregate, are deemed to be material to our financial condition.

Legal Proceedings:

Like many companies in our industry, we have from time to time received inquiries and subpoenas and other types of information requests from government authorities and others and we have been subject to claims and other actions related to our business activities. While the ultimate outcome of investigations, inquiries, information requests and legal proceedings is difficult to predict, adverse resolutions or settlements of those matters may result in, among other things, modification of our business practices, product recalls, costs and significant payments, which may have a material adverse effect on our results of operations, cash flows or financial condition.

Pending patent proceedings include challenges to the scope, validity and/or enforceability of our patents relating to certain of our products, uses of products or processes. Further, we are subject to claims of third parties that we infringe their patents covering products or processes. Although we believe we have substantial defenses to these challenges and claims, there can be no assurance as to the outcome of these matters and an adverse decision in these proceedings could result in one or more of the following: (i) a loss of patent protection, which could lead to a significant reduction of sales that could materially affect future results of operations, (ii) our inability to continue to engage in certain activities, and (iii) significant liabilities, including payment of damages, royalties and/or license fees to any such third party.

Among the principal matters pending are the following:

Patent Related Proceedings:

REVLIMID^®: We received Notice Letters, dated August 30, 2010, June 12, 2012 and April 3, 2014 from Natco Pharma Limited of India (Natco) notifying us of Natco’s Abbreviated New Drug Application (ANDA), which contain Paragraph IV certifications against certain of Celgene’s patents that are listed in the FDA Approved Drug Products With Therapeutic Equivalence Evaluations (the “Orange Book”) for REVLIMID^® (lenalidomide). Natco’s Notice Letters were sent in connection with its filing of an ANDA seeking permission from the FDA to market a generic version of 25mg, 15mg, 10mg and 5mg REVLIMID^® capsules. We filed separate infringement actions (which were subsequently consolidated) in the United States District Court for the District of New Jersey against Natco, Natco’s U.S. partner, Arrow International Limited (Arrow), and Arrow’s parent company, Watson Laboratories, Inc. (Watson, a wholly-owned subsidiary of Allergan plc (formerly known as Actavis, Inc.) and formerly known as Watson Pharmaceuticals, Inc.) (Natco, Arrow and Watson are collectively referred to hereinafter as “Natco”).

On December 22, 2015, we announced the settlement of the litigations with Natco. As part of the settlement, the parties filed Consent Judgments with the District Court that enjoin Natco from marketing generic lenalidomide before the April 2027 expiration of Celgene’s last-to-expire patent listed in the Orange Book for REVLIMID^®. We agreed to provide Natco with a license to Celgene’s patents required to manufacture and sell an unlimited quantity of generic lenalidomide in the United States beginning on January 31, 2026. In addition, Natco will receive a volume-limited license to sell generic lenalidomide in the United States commencing in March 2022. The volume limit is expected to be a mid-single-digit percentage of the total lenalidomide capsules dispensed in the United States during the first year of entry. The volume limitation is expected to increase gradually each 12 months until March 2025, and is not expected to exceed one-third of the total lenalidomide capsules dispensed in the U.S. in the final year of the volume-limited license. Natco’s ability to market generic lenalidomide in the U.S. will be contingent on its obtaining approval of an Abbreviated New Drug Application. The settlement agreement has been submitted to the Federal Trade Commission for review.

In 2012, our European patent EP 1667682 (the “’682 patent”) relating to certain polymorphic forms of lenalidomide expiring in 2024 was opposed in a proceeding before the European Patent Office (EPO) by Generics (UK) Ltd. and Teva Pharmaceutical Industries Ltd. On July 21, 2015, the EPO determined, based primarily on procedural grounds, that the ’682 patent was not valid. Celgene appealed the EPO ruling to the EPO Board of Appeal, which stays any revocation of the patent until the appeal is finally adjudicated. No appeal hearing date has been set. We do not anticipate a decision from the EPO Board of Appeal for several years and intend to vigorously defend all of our intellectual property rights.

In 2010, Celgene’s European patent EP1505973 (the “’973 patent”) relating to certain uses of lenalidomide expiring in 2023 was opposed in a proceeding before the EPO by Synthon B.V. and an anonymous party. On February 25, 2013, the EPO determined that the ’973 patent was not valid. Celgene appealed the EPO ruling to the EPO Board of Appeal, which stays any revocation of the patent until the appeal is finally adjudicated. No appeal hearing date has been set. We do not anticipate a decision from the EPO Board of Appeal for several years and intend to vigorously defend all of our intellectual property rights.

We believe that our patent portfolio for lenalidomide in Europe, including the composition of matter patent which expires in 2022, is strong and defensible. Although we believe that we will prevail in the EPO proceedings, in the event these patents are found not to be valid, we expect that we will still have patent protection in the EU for lenalidomide through at least 2022.

THALOMID^® and REVLIMID^®:On October 2, 2013, Andrulis Pharmaceuticals Corporation (Andrulis) filed a lawsuit against us in the United States District Court for the District of Delaware claiming infringement of U.S. Patent No. 6,140,346 (“the ’346 patent”). Andrulis alleges that we are liable for infringement of one or more claims of the ’346 patent, which covers the use of THALOMID^® (and, as asserted by Andrulis, REVLIMID^®) in combination with an alkylating agent (e.g., melphalan) to treat cancers. Andrulis is seeking an unspecified amount of damages, attorneys’ fees and injunctive relief. We disagree with Andrulis’ allegations and intend to vigorously defend against this infringement suit. On January 30, 2014, we filed a motion to dismiss Andrulis’ amended complaint. On April 11, 2014, the court denied our motion in part and granted our motion in part, dismissing two of Andrulis' four infringement claims without leave to amend. We filed an answer to the remaining claims on April 25, 2014. In February 2015, we filed a partial summary judgment motion.

The court held hearings on claim construction and on the partial summary judgment motion on May 27, 2015 and May 28, 2015, respectively. On June 26, 2015, the court issued its claim construction ruling and held that certain claim terms were indefinite. On July 28, 2015, the court entered final judgment in favor of Celgene. On August 27, 2015, Andrulis filed a notice of appeal to the United States Court of Appeals for the Federal Circuit on the final judgment and its indefiniteness and claim construction rulings. Plaintiff's opening brief was filed on December 2, 2015 and our response is due February 16, 2016. No hearing date has been scheduled.

ISTODAX® (romidepsin): We received a Notice Letter dated March 17, 2014 from Fresenius Kabi USA, LLC (Fresenius) notifying us of Fresenius’s ANDA that seeks approval from the FDA to market a generic version of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against U.S. Patent Nos. 7,608,280 and 7,611,724 (the ’280 and ’724 patents) that are listed in the Orange Book for ISTODAX^®.

On April 30, 2014, Celgene and Astellas Pharma Inc. (Astellas), filed an infringement action in the United States District Court for the District of Delaware against Fresenius.

Celgene and Astellas have reached an agreement to settle all claims and counterclaims with Fresenius. Under the terms of the settlement agreement, which was approved by the court, the parties have stipulated to dismiss the case and Celgene will provide Fresenius a non-exclusive, royalty-free sublicense to manufacture and market the Fresenius generic product as of February 1, 2018. The settlement agreement has been submitted to the Federal Trade Commission for review.

On August 4, 2014, we received a Notice Letter from InnoPharma, Inc. (InnoPharma) notifying us of Innopharma's ANDA that seeks approval from the FDA to market a generic version of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against the ’280 and ’724 patents.

On September 12, 2014, we and Astellas, filed an infringement action in the United States District Court for the District of Delaware against InnoPharma.

Celgene and Astellas have reached an agreement to settle all claims and counterclaims with InnoPharma. Under the terms of the settlement agreement, which was approved by the court, the parties have stipulated to dismiss the case. In addition, Celgene will provide InnoPharma a non-exclusive, royalty-free sublicense to manufacture and market the InnoPharma generic product at a date after February 1, 2018 and prior to the expiration of the ’280 and ’724 patents. The settlement agreement has been submitted to the Federal Trade Commission for review.

On May 28, 2015, we received a Notice Letter from Teva Pharmaceuticals USA, Inc. (Teva) notifying us of Teva’s ANDA that seeks approval from the FDA to market a generic version of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against the '280 and '724 patents.

On July 10, 2015, we and Astellas filed an infringement action in the United States District Court for the District of Delaware against Teva. In its answer and counterclaim, Teva asserts that the ’280 and ’724 patents are invalid and/or not infringed by its proposed generic products. As a result of the filing of our action, the FDA cannot grant final approval of Teva’s ANDA until the earlier of (i) a final decision that each of the patents is invalid and/or not infringed; or (ii) November 28, 2017. Fact discovery is set to close on August 9, 2016. A claim construction hearing is scheduled for August 23, 2016. Expert discovery is set to close on April 18, 2017 and trial is scheduled to begin on June 19, 2017.

On October 30, 2015, we received a Notice Letter from Teva notifying us of Teva’s New Drug Application pursuant to FDC Act § 505(b)(3)(D)(i) seeking approval to engage in the commercial manufacture, use or sale of romidepsin for injection. The Notice Letter contains Paragraph IV certifications against the '280 and '724 patents.

On December 10, 2015, we and Astellas filed an infringement action in the United States District Court for the District of Delaware against Teva. As a result of the filing of our action, the FDA cannot grant final approval of Teva’s NDA until the earlier of (i) a final decision that each of the patents is invalid and/or not infringed; or (ii) April 30, 2018.

THALOMID^® (thalidomide): We received a Notice Letter dated December 18, 2014 from Lannett Holdings, Inc. (Lannett) notifying us of Lannett’s ANDA which contains Paragraph IV certifications against U.S. Patent Nos. 5,629,327; 6,045,501; 6,315,720; 6,561,976; 6,561,977; 6,755,784; 6,869,399; 6,908,432; 7,141,018; 7,230,012; 7,435,745; 7,874,984; 7,959,566; 8,204,763; 8,315,886; 8,589,188; and 8,626,531 that are listed in the Orange Book for THALOMID^® (thalidomide). Lannett is seeking to market a generic version of 50mg, 100mg, 150mg and 200mg of THALOMID^® capsules. On January 30, 2015, we filed an infringement action against Lannett in the United States District Court for the District of New Jersey. As a result of the filing of our action, the FDA cannot grant final approval of Lannett’s ANDA until the earlier of (i) a final decision that each of the patents is invalid, unenforceable, and/or not infringed; or (ii) June 22, 2017. On March 27, 2015, Lannett filed a motion to dismiss our complaint for lack of personal jurisdiction and we filed a response to the motion on April 20, 2015. A hearing was held on July 27, 2015 and the Court decided to administratively terminate the motion to dismiss in order to allow us to conduct jurisdictional discovery. On November 17, 2015, Lannett withdrew its motion to dismiss.  On December 8, 2015, Lannett filed an answer and counterclaims asserting that the patents-in-suit are invalid, unenforceable, and/or not infringed and on January 19, 2016 we filed a reply to Lannett's counterclaims. The court has not yet entered a schedule for discovery or trial.

Proceedings involving the USPTO:

Under the America Invents Act (AIA), any person may seek to challenge an issued patent by petitioning the United States Patent and Trademark Office (USPTO) to institute a post grant review. On April 23, 2015, we were informed that Coalition for Affordable Drugs VI LLC filed petitions for Inter Partes Review (IPRs) challenging the validity of Celgene’s patents US 6,045,501 and US 6,315,720 covering certain aspects of our REMS program. On October 27, 2015, the USPTO Patent Trial and Appeal Board (PTAB) instituted IPR proceedings relating to these patents. An oral hearing has been scheduled for July 21, 2016 and a decision is expected by October 27, 2016.

In accordance with the requirements of the AIA, we expect final decisions from the PTAB not later than one year after the institution of the IPRs. Any patent claim the PTAB determines to be unpatentable is stricken from the challenged patent. Any party may appeal final written decisions of the PTAB to the United States Court of Appeals for the Federal Circuit. We intend to continue to vigorously defend our patent claims.

Other Proceedings:

In 2009, we received a Civil Investigative Demand (CID) from the U.S. Federal Trade Commission (FTC) seeking documents and other information relating to requests by manufacturers of generic drugs to purchase our patented REVLIMID^® and THALOMID^® brand drugs in order for the FTC to evaluate whether there may be reason to believe that we have engaged in unfair methods of competition. In 2010, the State of Connecticut issued a subpoena referring to the same issues raised by the 2009 CID. Also in 2010, we received a second CID from the FTC relating to this matter. We continue to cooperate with the FTC and State of Connecticut investigations.

On April 3, 2014, Mylan Pharmaceuticals Inc. (Mylan) filed a lawsuit against us in the United States District Court for the District of New Jersey alleging that we violated various federal and state antitrust and unfair competition laws by allegedly refusing to sell samples of our THALOMID^® and REVLIMID^® brand drugs so that Mylan can conduct the bioequivalence testing necessary for ANDAs to be submitted to the FDA for approval to market generic versions of these products. Mylan is seeking injunctive relief, damages and declaratory judgment. We filed a motion to dismiss Mylan’s complaint on May 25, 2014. Mylan filed its opposition to our motion to dismiss on June 16, 2014. The Federal Trade Commission filed an amicus curiae brief in opposition to our motion to dismiss on June 17, 2014. On December 22, 2014, the court granted Celgene’s motion to dismiss (i) Mylan’s claims based on Section 1 of the Sherman Act (without prejudice), and (ii) Mylan's claims arising under the New Jersey Antitrust Act. The court denied our motion to dismiss the rest of the claims which primarily relate to Section 2 of the Sherman Act. On January 6, 2015 we filed a motion to certify for interlocutory appeal the order denying our motion to dismiss with respect to the claims relating to Section 2 of the Sherman Act, which appeal was denied by the United State Court of Appeals for the Third Circuit on March 5, 2015. On January 20, 2015, we filed an answer to Mylan’s complaint. Fact discovery is set to close April 8, 2016 and expert discovery is set to be completed by October 24, 2016. No trial date has been set. We intend to vigorously defend against Mylan’s claims.

In 2011, the United States Attorney’s Office for the Central District of California informed us that they were investigating possible off-label marketing and improper payments to physicians in connection with the sales of THALOMID^® and REVLIMID^®. In 2012, we learned that two other United States Attorneys’ offices (the Northern District of Alabama and the Eastern District of Texas) and various state Attorneys General were conducting related investigations. In February 2014, three civil qui tam actions related to those investigations brought by three former Celgene employees on behalf of the federal and various state governments under the federal false claims act and similar state laws were unsealed after the United States Department of Justice (DOJ) declined to intervene in any of these actions. The DOJ retains the right to intervene in these actions at any time. Additionally, while several states have similarly declined to intervene in some of these actions, they also retain the right to intervene in the future. The plaintiffs in the Northern District of Alabama and Eastern District of Texas actions have voluntarily dismissed their cases. On April 25, 2014, we filed a motion to dismiss the complaint in the remaining (Central District of California) action, United States of America ex. rel. Beverly Brown V. Celgene Corp., unsealed February 5, 2014 (the Brown Action), which was denied except with respect to certain state claims. We filed our answer to the complaint on August 28, 2014. Fact discovery closed on September 25, 2015. On January 21, 2016, the court vacated the expert discovery deadline. Summary judgment motions are to be filed jointly with the court by April 18, 2016. No trial date has been set. We intend to vigorously defend against the claims in the Brown Action.

In February 2014, we received a letter purportedly on behalf of a stockholder demanding access to certain books and records of the Company for the purpose of investigating matters pertaining to the Brown Action. The Company complied with the demand, as modified through negotiation with counsel for the purported stockholder. In July 2014, we received a letter purportedly on behalf of two stockholders (one of which was referenced in the February 2014 letter) that demands, primarily on the basis of the allegations in the Brown Action, that our board of directors take action on the Company’s behalf to correct alleged deficiencies in the Company’s internal controls and to recover from current and past directors and officers damages those stockholders allege to have resulted from breaches of fiduciary duties related to the matters alleged in the Brown Action (the Demand). Our Board formed a Demand Investigation Committee, and with the assistance of independent counsel retained by it, the Demand Investigation Committee considered the issues raised in the stockholders’ letter. In October 2015, the Demand Investigation Committee reported to the Board of Directors, and the Board of Directors accepted the Committee’s recommendation, that the Company take no action at this time, legal or otherwise, in response to the stockholders’ demands. In November 2015, we received another letter purportedly on behalf of the same two stockholders that demands access to certain books and records of the Company for the purpose of investigating whether the Demand was wrongfully refused, the independence, good faith and due care of the Demand Investigation Committee, and whether the Demand Investigation Committee conducted a reasonable investigation of the Demand. The Company is in the process of responding to this latest letter.

In November 2014, we received another letter purportedly on behalf of a stockholder demanding access to certain books and records of the Company for the purpose of investigating matters pertaining to the Brown Action. The Company complied with the demand, as modified through negotiation with counsel for the purported stockholder, and in November 2015 the stockholder filed a complaint in Delaware Chancery Court asserting derivative claims on behalf of the Company against eight current, and four former members of the Board of Directors. The complaint alleges, largely on the basis of allegations in the Brown Action, that the defendant directors breached their fiduciary duties by allowing the Company to engage in unlawful activity in its marketing of THALOMID and REVLIMID, and seeks from the defendant directors unspecified damages, including Celgene’s costs of defending against government and civil investigations and lawsuits and alleged reputational harm, and disgorgement of compensation paid to the defendant directors. On January 22, 2016, the Company filed a motion to dismiss the complaint on the basis that prior to filing the complaint asserting derivative claims the plaintiff was required under Delaware law and failed to demand that our board of directors take action on the Company’s behalf. Oral argument on the motion has not yet been scheduled.

On June 7, 2013, Children's Medical Center Corporation (CMCC) filed a lawsuit against us in the Superior Court of the Commonwealth of Massachusetts alleging that our obligation to pay a 1% royalty on REVLIMID^® net sales revenue and a 2.5% royalty on POMALYST^®/IMNOVID^® net sales revenue under a license agreement entered into in December 2002 extended beyond February 28, 2013 and that our failure to make royalty payments to CMCC subsequent to February 28, 2013 breached the license agreement. CMCC is seeking unspecified damages and a declaration that the license agreement remains in full force and effect. In July 2013, we removed these proceedings to the United States District Court for the District of Massachusetts. On August 5, 2013, we filed an answer to CMCC’s complaint and a counterclaim for declaratory judgment that our obligations to pay royalties have expired. On August 26, 2013, CMCC filed an answer to our counterclaim.

On July 8, 2014, CR Rev Holdings, LLC (“CR Rev”) filed a complaint against Celgene in the same action. CR Rev alleges that CMCC sold and assigned a substantial portion of the royalty payments owed by Celgene on the sale of REVLIMID^® to CR Rev. CR Rev has alleged causes of action with respect to REVLIMID^® identical to those alleged by CMCC, and seeks unspecified damages and a declaration that the license agreement is still in effect. 

Discovery in this matter has been completed. On August 4, 2015, Plaintiffs filed a motion for summary judgment on certain claims, including breach of contract, declaratory judgment and, with respect to Celgene’s counterclaims, patent misuse.  Oral argument on the motion was held on October 21, 2015.  No trial date has as yet been set by the court.

We intend to vigorously defend against CMCC's and CR Rev’s claims. As of December 31, 2015, we consider the range of reasonably possible loss relating to this lawsuit to be between zero and $141.3 million, with the high end of the range being the royalty payments on REVLIMID^® we would have made to CMCC under the license agreement through December 31, 2015, if our obligation to pay royalties remained in effect. CMCC contends that our royalty obligation continues on net sales of REVLIMID^®, as well as POMALYST^®/IMNOVID^®, at least until May 2016. If CMCC prevails, we may be obligated to continue to pay royalties on sales for periods after December 31, 2015.

On October 2, 2014, a complaint was filed in Delaware Chancery Court by a stockholder asserting derivative claims on behalf of the Company against the non-employee members of the Board of Directors. The complaint, as subsequently amended, alleged that equity grants made to non-employee directors in 2012, 2013 and 2014 were excessive compared to the equity grants to directors of peer companies, and that the award of such allegedly excessive compensation constituted a breach of fiduciary duty, waste of corporate assets, and unjust enrichment. On September 14, 2015, the parties agreed to settle all claims in the case, subject to the Chancery Court’s approval of the settlement. The settlement was approved by the court in December 2015. The settlement provides prospective relief only, setting limits on equity grants to non-employee directors for at least four years and requiring certain changes in the charter of the Board’s compensation committee and certain disclosures concerning non-employee director compensation.

On November 7, 2014, the International Union of Bricklayers and Allied Craft Workers Local 1 Health Fund (IUB) filed a putative class action lawsuit against us in the United States District Court for the District of New Jersey alleging that we violated various state antitrust, consumer protection, and unfair competition laws by (a) allegedly securing an exclusive supply contract with Seratec S.A.R.L. so that Barr Laboratories (“Barr”) allegedly could not secure its own supply of thalidomide active pharmaceutical ingredient; (b) allegedly refusing to sell samples of our THALOMID^® and REVLIMID^® brand drugs to Mylan Pharmaceuticals, Lannett Company, and Dr. Reddy’s Laboratories so that those companies can conduct the bioequivalence testing necessary for ANDAs to be submitted to the FDA for approval to market generic versions of these products; and (c) allegedly bringing unjustified patent infringement lawsuits against Barr and Natco Pharma Limited in order to allegedly delay those companies from obtaining approval for proposed generic versions of THALOMID^® and REVLIMID^®. IUB, on behalf of itself and a putative class of third party payers, is seeking injunctive relief and damages. On February 6, 2015, we filed a motion to dismiss IUB’s complaint. On March 3, 2015, the City of Providence (“Providence”) filed a similar putative class action making similar allegations. Both IUB and Providence, on behalf of themselves and a putative class of third party payers, are seeking injunctive relief and damages. Providence agreed that the decision in the motion to dismiss IUB’s complaint would apply to the identical claims in Providence’s complaint. A supplemental motion to dismiss Providence's state law claims was filed on April 20, 2015. On October 30, 2015, the court denied our motion to dismiss on all grounds.

Celgene filed its Answer to the IUB and Providence complaints on January 11, 2016. The completion of fact discovery and expert discovery is scheduled for August 1, 2017 and December 15, 2017, respectively. No trial date has been set. We intend to vigorously defend against IUB’s claims.

On July 20, 2015, a putative class action lawsuit, Scott v. Receptos, Inc., related to our acquisition of Receptos, was commenced by the filing of a complaint in the Court of Chancery for the State of Delaware, Case No. 11316, against Receptos, members of the Receptos Board, Celgene and Celgene’s wholly-owned subsidiary, Strix Corporation, which is a party to the acquisition agreement. Four other complaints, Cacioppo v. Hasnain and Rosenberg v. Receptos, Inc. (Cases Nos. 11324 and 11325) filed on July 23, and Kadin v. Receptos, Inc., filed on July 27 (Case No. 11337), and Rockaway v. Hasnain (Case No. 11346) filed on July 28, 2015 raise similar putative class claims in the Court of Chancery for the State of Delaware against some or all of Receptos, members of the Receptos Board, Celgene, and Strix Corporation. These complaints generally allege breaches of fiduciary duty by members of the Receptos Board in connection with the Merger Agreement. In the Scott, Rosenberg and Kadin actions, the plaintiffs also allege that Celgene and Strix Corporation aided and abetted the purported breaches of fiduciary duty. On August 17, 2015, all parties to these actions entered into a Memorandum of Understanding (MOU), which sets forth the parties’ agreement in principle for a settlement of the actions. The MOU contemplates that the parties will seek to enter into a stipulation of settlement providing for a global release of claims relating to the acquisition as set forth in the MOU. The claims will not be released until such stipulation of settlement is approved by the Court of Chancery of the State of Delaware. Although the parties are in the process of negotiating the terms of the stipulation of settlement, there can be no assurance that the parties will ultimately enter into a stipulation of settlement or that the court will approve such settlement even if the parties were to enter into such stipulation. The settlement did not affect the consideration received by Receptos’ stockholders in connection with the acquisition. As part of the settlement, Receptos agreed to make certain additional disclosures related to the acquisition.

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Geographic and Product Information

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Geographic and Product Information

Geographic and Product Information

Operations by Geographic Area:    Revenues primarily consisted of sales of REVLIMID^®, ABRAXANE^®, POMALYST^®/IMNOVID^®, OTEZLA^®, VIDAZA^®, azacitidine for injection, THALOMID^®, and ISTODAX^®. Additional sources of revenue included a licensing agreement with Novartis, which entitles us to royalties on FOCALIN XR^® and the entire RITALIN^® family of drugs, the sale of services through our Cellular Therapeutics subsidiary and other miscellaneous licensing agreements.

Revenues	2015		2014		2013
United States	$	5,604.0	$	4,482.8	$	3,862.1
Europe	2,624.3		2,310.8		1,865.7
All other	1,027.7		876.8		766.1
Total revenues	$	9,256.0	$	7,670.4	$	6,493.9

Long-Lived Assets1	2015		2014
United States	$	585.5	$	406.1
Europe	215.2		222.2
All other	13.4		14.3
Total long lived assets	$	814.1	$	642.6

¹  Long-lived assets consist of net property, plant and equipment.

Revenues by Product: Total revenues from external customers by product for the years ended December 31, 2015, 2014 and 2013 were as follows:

	2015		2014		2013
REVLIMID®	$	5,801.1	$	4,980.0	$	4,280.3
ABRAXANE®	967.5		848.2		648.9
POMALYST®/IMNOVID®	983.3		679.7		305.4
OTEZLA®	471.7		69.8		—
VIDAZA®	590.7		611.9		803.3
azacitidine for injection	83.9		78.2		23.3
THALOMID®	185.4		221.2		244.5
ISTODAX®	69.1		65.6		54.0
Other	8.4		9.2		2.6
Total net product sales	9,161.1		7,563.8		6,362.3
Other revenue	94.9		106.6		131.6
Total revenue	$	9,256.0	$	7,670.4	$	6,493.9

Major Customers: We sell our products primarily through wholesale distributors and specialty pharmacies in the United States, which account for a large portion of our total revenues. International sales are primarily made directly to hospitals, clinics and retail chains, many of which are government owned. During the three-year period of 2015, 2014 and 2013, customers that accounted for more than 10% of our total revenue in at least one of those years are summarized below. The percentage of amounts due from these customers compared to total net accounts receivable is also summarized below as of December 31, 2015 and 2014.

	Percent of Total Revenue						Percent of Net Accounts Receivable
Customer	2015		2014		2013		2015		2014
Amerisource Bergen Corp.	8.1	%	9.0	%	10.7	%	8.2	%	9.7	%
CVS	10.7	%	9.8	%	9.3	%	8.2	%	7.6	%

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Quarterly Results of Operations (Unaudited)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Quarterly Results of Operations (Unaudited)

Quarterly Results of Operations (Unaudited)

2015	1Q		2Q		3Q3			4Q		Year
Total revenue	$	2,080.8	$	2,277.8	$	2,334.1		$	2,563.3	$	9,256.0
Gross profit1	1,951.2		2,153.3		2,202.7			2,433.8		8,741.0
Income tax provision	108.2		114.6		14.2			184.5		421.5
Net income (loss)	718.9		356.2		(34.1		)	561.0		1,602.0
Net income (loss) per share:2
Basic	$	0.90	$	0.45	$	(0.04	)	$	0.71	$	2.02
Diluted	$	0.86	$	0.43	$	(0.04	)	$	0.69	$	1.94
Weighted average shares:
Basic	798.9		793.0		791.1			785.8		792.2
Diluted	834.1		825.3		791.1			816.5		824.9

2014	1Q4		2Q		3Q		4Q		Year
Total revenue	$	1,730.0	$	1,872.7	$	1,982.2	$	2,085.5	$	7,670.4
Gross profit1	1,621.4		1,745.7		1,859.1		1,951.7		7,177.9
Income tax provision	52.6		109.0		69.0		96.9		327.5
Net income	279.7		597.8		508.5		613.9		1,999.9
Net income per share:2
Basic	$	0.34	$	0.75	$	0.64	$	0.77	$	2.49
Diluted	$	0.33	$	0.72	$	0.61	$	0.74	$	2.39
Weighted average shares:
Basic	811.5		799.6		799.6		800.2		802.7
Diluted	845.1		831.0		832.8		834.6		836.0

¹  Gross profit is computed by subtracting cost of goods sold (excluding amortization of acquired intangible assets) from net product sales.

²  The sum of the quarters may not equal the full year due to rounding. In addition, quarterly and full year basic and diluted earnings per share are calculated separately.

³  Net income for 2015 was a loss in the third quarter primarily due to costs related to collaborations and the acquisition of Receptos.

⁴  Net income for 2014 was lower in the first quarter compared to each of the other three quarters primarily due to a higher level of expense related to research and development collaborations.

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Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2015

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

Schedule II – Valuation and Qualifying Accounts

(In Millions)

Year ended December 31,	Balance at Beginning of Year		Charged to Expense or Sales				Deductions		Balance at End of Year
2015:
Allowance for doubtful accounts	$	20.6	$	(0.1	)		$	2.4	$	18.1
Allowance for customer discounts	11.5		111.7			1	111.0		12.2
Subtotal	32.1		111.6				113.4		30.3
Allowance for sales returns	10.2		16.3			1	9.1		17.4
Total	$	42.3	$	127.9			$	122.5	$	47.7
2014:
Allowance for doubtful accounts	$	27.9	$	(2.7	)		$	4.6	$	20.6
Allowance for customer discounts	12.1		87.9			1	88.5		11.5
Subtotal	40.0		85.2				93.1		32.1
Allowance for sales returns	15.5		2.5			1	7.8		10.2
Total	$	55.5	$	87.7			$	100.9	$	42.3
2013:
Allowance for doubtful accounts	$	21.8	$	6.2			$	0.1	$	27.9
Allowance for customer discounts	11.2		74.3			1	73.4		12.1
Subtotal	33.0		80.5				73.5		40.0
Allowance for sales returns	13.3		9.6			1	7.4		15.5
Total	$	46.3	$	90.1			$	80.9	$	55.5

¹  Amounts are a reduction from gross sales.

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Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Financial Instruments

Financial Instruments: Certain financial instruments reflected in the Consolidated Balance Sheets, (e.g., cash, cash equivalents, accounts receivable, certain other assets, accounts payable, short-term borrowings and certain other liabilities) are recorded at cost, which approximates fair value due to their short-term nature. The fair values of financial instruments other than marketable securities are determined through a combination of management estimates and information obtained from third parties using the latest market data. The fair value of available-for-sale marketable securities is determined utilizing the valuation techniques appropriate to the type of security (See Note 4).

Derivative Instruments and Hedges

Derivative Instruments and Hedges: All derivative instruments are recognized on the balance sheet at their fair value. Changes in the fair value of derivative instruments are recorded each period in current earnings or other comprehensive income (loss), depending on whether a derivative instrument is designated as part of a hedging transaction and, if it is, the type of hedging transaction. For a derivative to qualify as a hedge at inception and throughout the hedged period, we formally document the nature and relationships between the hedging instruments and hedged item. We assess, both at inception and on an on-going basis, whether the derivative instruments that are used in cash flow hedging transactions are highly effective in offsetting the changes in cash flows of hedged items. We assess hedge ineffectiveness on a quarterly basis and record the gain or loss related to the ineffective portion of derivative instruments, if any, to current earnings. If we determine that a forecasted transaction is no longer probable of occurring, we discontinue hedge accounting and any related unrealized gain or loss on the derivative instrument is recognized in current earnings. We use derivative instruments, including those not designated as part of a hedging transaction, to manage our exposure to movements in foreign exchange, our stock price and interest rates. The use of these derivative instruments modifies the exposure of these risks with the intent to reduce our risk or cost.

Cash, Cash Equivalents and Marketable Securities Available for Sale

Cash, Cash Equivalents and Marketable Securities Available for Sale: We invest our excess cash primarily in money market funds, U.S. Treasury securities, U.S. government-sponsored agency securities, U.S. government-sponsored agency mortgage-backed securities (MBS), non-U.S. government, agency and supranational securities, global corporate debt securities and asset backed securities. All liquid investments with maturities of three months or less from the date of purchase are classified as cash equivalents and all investments with maturities of greater than three months from date of purchase are classified as marketable securities available for sale. We determine the appropriate classification of our investments in marketable debt and equity securities at the time of purchase. In addition, our equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements, are designated as marketable securities available for sale.

Our marketable securities available for sale are primarily equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements. In addition, we invest in debt securities that are carried at fair value, held for an unspecified period of time and are intended for use in meeting our ongoing liquidity needs. Unrealized gains and losses on available-for-sale securities, which are deemed to be temporary, are reported as a separate component of stockholders' equity, net of tax. The cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. The amortization, along with realized gains and losses and other-than-temporary impairment charges, is included in interest and investment income, net.

A decline in the market value of any available-for-sale security below its carrying value that is determined to be other-than-temporary would result in a charge to earnings and decrease in the security's carrying value down to its newly established fair value. Factors evaluated to determine if an investment is other-than-temporarily impaired include significant deterioration in earnings performance, credit rating, asset quality or business prospects of the issuer; adverse changes in the general market condition in which the issuer operates; our intent to hold to maturity and an evaluation as to whether it is more likely than not that we will not have to sell before recovery of its cost basis; our expected future cash flows from the security; and issues that raise concerns about the issuer's ability to continue as a going concern.

Concentration of Credit Risk

Concentration of Credit Risk: Cash, cash equivalents and marketable securities are financial instruments that potentially subject the Company to concentration of credit risk. We invest our excess cash primarily in money market funds, U.S. Treasury securities, U.S. government-sponsored agency securities, MBS, non-U.S. government, agency and supranational securities, global corporate debt securities and asset backed securities (See Note 6). We have established guidelines relative to diversification and maturities to maintain safety and liquidity. These guidelines are reviewed periodically and may be modified to take advantage of trends in yields and interest rates.

We sell our products in the United States primarily through wholesale distributors and specialty contracted pharmacies. Therefore, wholesale distributors and large pharmacy chains account for a large portion of our U.S. trade receivables and net product revenues (See Note 19). International sales are primarily made directly to hospitals, clinics and retail chains, many of which in Europe are government owned and have extended their payment terms in recent years given the economic pressure these countries are facing. We continuously monitor the creditworthiness of our customers, including these governments, and have internal policies regarding customer credit limits. We estimate an allowance for doubtful accounts primarily based on the credit worthiness of our customers, historical payment patterns, aging of receivable balances and general economic conditions, including publicly available information on the credit worthiness of countries themselves and provinces or areas within such countries where they are the ultimate customers.

We continue to monitor economic conditions, including the volatility associated with international economies, the sovereign debt crisis in certain European countries and associated impacts on the financial markets and our business. Our current business model in these markets is typically to sell our products directly to principally government owned or controlled hospitals, which in turn directly deliver critical care to patients. Our products are used to treat life-threatening diseases and we believe this business model enables timely delivery and adequate supply of products. Many of the outstanding receivable balances are related to government-funded hospitals and we believe the receivable balances are ultimately collectible. Similarly, we believe that future sales to these customers will continue to be collectible.

The credit and economic conditions within Spain, Italy, Portugal and Greece, as well as increasing sales levels in those countries have in the past resulted in, and may continue to result in, an increase in the average length of time it takes to collect accounts receivable.

Inventory

Inventory: Inventories are recorded at the lower of cost or market, with cost determined on a first-in, first-out basis. We periodically review the composition of inventory in order to identify obsolete, slow-moving or otherwise non-saleable items. If non-saleable items are observed and there are no alternate uses for the inventory, we will record a write-down to net realizable value in the period that the decline in value is first recognized. Included in inventory are raw materials used in the production of preclinical and clinical products, which are charged to research and development expense when consumed.

We capitalize inventory costs associated with certain products prior to regulatory approval of products, or for inventory produced in new production facilities, when management considers it highly probable that the pre-approval inventories will be saleable. The determination to capitalize is based on the particular facts and circumstances relating to the expected regulatory approval of the product or production facility being considered, and accordingly, the time frame within which the determination is made varies from product to product. The assessment of whether or not the product is considered highly probable to be saleable is made on a quarterly basis and includes, but is not limited to, how far a particular product or facility has progressed along the approval process, any known safety or efficacy concerns, potential labeling restrictions and other impediments. We could be required to write down previously capitalized costs related to pre-launch inventories upon a change in such judgment, or due to a denial or delay of approval by regulatory bodies, a delay in commercialization or other potential factors.

Property, Plant and Equipment

Property, Plant and Equipment: Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation of plant and equipment is recorded using the straight-line method. Building improvements are depreciated over the remaining useful life of the building. Leasehold improvements are depreciated over the lesser of the economic useful life of the asset or the remaining term of the lease, including anticipated renewal options. The estimated useful lives of capitalized assets are as follows:

Buildings	40 years
Building and operating equipment	15 years
Manufacturing machinery and equipment	10 years
Other machinery and equipment	5 years
Furniture and fixtures	5 years
Computer equipment and software	3-7 years

Maintenance and repairs are charged to operations as incurred, while expenditures for improvements which extend the life of an asset are capitalized.

Capitalized Software Costs

Capitalized Software Costs: We capitalize software costs incurred in connection with developing or obtaining software. Capitalized software costs are included in property, plant and equipment, net and are amortized over their estimated useful life of three to seven years from the date the systems are ready for their intended use.

Investments in Other Entities

Investments in Other Entities: We hold a portfolio of investments in equity securities and certain investment funds that are accounted for under either the equity method or cost method. Investments in companies or certain investment funds over which we have significant influence but not a controlling interest are accounted for using the equity method, with our share of earnings or losses reported in other income (expense), net. Our equity investments in the publicly traded common stock of companies, including common stock of companies with whom we have entered into collaboration agreements, are designated as marketable securities available for sale. Investments in equity securities of companies that become publicly traded are accounted for as available-for-sale marketable securities prospectively from the date of such companies' initial public offering if we are not restricted from selling our investment for greater than one year. Our cost method and equity method investments are included in other assets on the Consolidated Balance Sheets.

All investments are reviewed on a regular basis for possible impairment. If an investment's fair value is determined to be less than its net carrying value and the decline is determined to be other-than-temporary, the investment is written down to its fair value. Such an evaluation is judgmental and dependent on specific facts and circumstances. Factors considered in determining whether an other-than-temporary decline in value has occurred include: market value or exit price of the investment based on either market-quoted prices or future rounds of financing by the investee; length of time that the market value was below its cost basis; financial condition and business prospects of the investee; our intent and ability to retain the investment for a sufficient period of time to allow for recovery in market value of the investment; issues that raise concerns about the investee's ability to continue as a going concern; any other information that we may be aware of related to the investment.

Other Intangible Assets

Other Intangible Assets: Intangible assets with definite useful lives are amortized to their estimated residual values over their estimated useful lives and reviewed for impairment if certain events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Amortization is initiated for in-process research and development (IPR&D) intangible assets when their useful lives have been determined. IPR&D intangible assets which are determined to have had a drop in their fair value are adjusted downward and an expense recognized in the income statement. These IPR&D intangible assets are tested at least annually or when a triggering event occurs that could indicate a potential impairment.

Goodwill

Goodwill: Goodwill represents the excess of purchase price over fair value of net assets acquired in a business combination accounted for by the acquisition method of accounting and is not amortized, but is subject to impairment testing.  We test our goodwill for impairment at least annually or when a triggering event occurs that could indicate a potential impairment by assessing qualitative factors or performing a quantitative analysis in determining whether it is more likely than not that the fair value of net assets are below their carrying amounts.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets: Long-lived assets, such as property, plant and equipment and certain other long-term assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.

Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset or asset group to the estimated undiscounted future cash flows expected to be generated by the asset or asset group. If the carrying amount of the assets exceed their estimated future undiscounted net cash flows, an impairment charge is recognized for the amount by which the carrying amount of the assets exceed the fair value of the assets.

Contingent Consideration from Business Combinations

Contingent Consideration from Business Combinations: Subsequent to the acquisition date, we measure contingent consideration arrangements at fair value for each period with changes in fair value recognized in income as acquisition related charges, net. Changes in fair values reflect new information about related IPR&D and other assets and the passage of time. In the absence of new information, changes in fair value reflect only the passage of time as development work towards the achievement of the milestones progresses, and is accrued based on an accretion schedule.

Foreign Currency Translation

Foreign Currency Translation: Operations in non-U.S. entities are recorded in the functional currency of each entity. For financial reporting purposes, the functional currency of an entity is determined by a review of the source of an entity's most predominant cash flows. The results of operations for non-U.S. dollar functional currency entities are translated from functional currencies into U.S. dollars using the average currency rate during each month, which approximates the results that would be obtained using actual currency rates on the dates of individual transactions. Assets and liabilities are translated using currency rates at the end of the period. Adjustments resulting from translating the financial statements of our foreign entities into the U.S. dollar are excluded from the determination of net income and are recorded as a component of other comprehensive income (loss). Transaction gains and losses are recorded in other income (expense), net in the Consolidated Statements of Income.

Research and Development Costs

Research and Development Costs: Research and development costs are expensed as incurred. These include all internal and external costs related to services contracted by us. Upfront and milestone payments made to third parties in connection with research and development collaborations are expensed as incurred up to the point of regulatory approval. Milestone payments made to third parties upon regulatory approval are capitalized and amortized over the remaining useful life of the related product. Upfront payments are recorded when incurred, and milestone payments are recorded when the specific milestone has been achieved

Income Taxes

Income Taxes: We utilize the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement carrying amounts and tax bases of assets and liabilities using enacted tax rates in effect for years in which the temporary differences are expected to reverse. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. We recognize the benefit of an uncertain tax position that we have taken or expect to take on income tax returns we file if such tax position is more likely than not to be sustained.

Revenue Recognition

Revenue Recognition: Revenue from the sale of products is recognized when title and risk of loss of the product is transferred to the customer and the sales price is fixed and determinable. Provisions for discounts, early payments, rebates, sales returns and distributor chargebacks under terms customary in the industry are provided for in the same period the related sales are recorded. We record estimated reductions to revenue for volume-based discounts and rebates at the time of the initial sale. The estimated reductions to revenue for such volume-based discounts and rebates are based on the sales terms, historical experience and trend analysis.

We base our sales returns allowance on estimated on-hand retail/hospital inventories, measured end-customer demand as reported by third-party sources, actual returns history and other factors, such as the trend experience for lots where product is still being returned or inventory centralization and rationalization initiatives conducted by major pharmacy chains, as applicable.  If the historical data we use to calculate these estimates do not properly reflect future returns, then a change in the allowance would be made in the period in which such a determination is made and revenues in that period could be materially affected.  Under this methodology, we track actual returns by individual production lots.  Returns on closed lots, that is, lots no longer eligible for return credits, are analyzed to determine historical returns experience.  Returns on open lots, that is, lots still eligible for return credits, are monitored and compared with historical return trend rates.  Any changes from the historical trend rates are considered in determining the current sales return allowance. 

Sales discount accruals are based on payment terms extended to customers.

Government rebate accruals are based on estimated payments due to governmental agencies for purchases made by third parties under various governmental programs. U.S. Medicaid rebate accruals are generally based on historical payment data and estimates of future Medicaid beneficiary utilization applied to the Medicaid unit rebate formula established by the Center for Medicaid and Medicare Services. The Medicaid rebate percentage was increased and extended to Medicaid Managed Care Organizations in March 2010. The accrual of the rebates associated with Medicaid Managed Care Organizations is calculated based on estimated historical patient data related to Medicaid Managed Care Organizations. We also analyze actual billings received from the states to further support the accrual rates. Subsequent to implementation of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, the 2010 U.S. Health Care Reform Law), certain states have not completed their Medicaid Managed Care Organization billing for the years of 2010 through 2015. Our accruals for these Medicaid Managed Care Organization rebates had been at elevated levels given the delays in the receipt of complete invoices from certain states. Due to the receipt of more complete claims data during 2013, 2014 and 2015, the accruals for certain states were reduced from these elevated levels as a result of both payments being applied to the accrual during 2013, 2014 and 2015 and changes in estimate of the ultimate obligation during the fourth quarters of 2013, 2014 and 2015. We will continue to adjust the rebate accruals as more information becomes available and to reflect actual claims experience. Manufacturers of pharmaceutical products are responsible for 50% of the patient’s cost of branded prescription drugs related to the Medicare Part D Coverage Gap. In order to estimate the cost to us of this coverage gap responsibility, we analyze data for eligible Medicare Part D patients against data for eligible Medicare Part D patients treated with our products as well as the historical invoices. This expense is recognized throughout the year as costs are incurred. In certain international markets government-sponsored programs require rebates to be paid based on program specific rules and, accordingly, the rebate accruals are determined primarily on estimated eligible sales.

Rebates or administrative fees are offered to certain wholesale customers, group purchasing organizations and end-user customers, consistent with pharmaceutical industry practices. Settlement of rebates and fees may generally occur from one to 15 months from the date of sale. We record a provision for rebates at the time of sale based on contracted rates and historical redemption rates. Assumptions used to establish the provision include level of wholesaler inventories, contract sales volumes and average contract pricing. We regularly review the information related to these estimates and adjust the provision accordingly.

Chargeback accruals are based on the differentials between product acquisition prices paid by wholesalers and lower government contract pricing paid by eligible customers covered under federally qualified programs. Distributor service fee accruals are based on contractual fees to be paid to the wholesale distributor for services provided. TRICARE is a health care program of the U.S. Department of Defense Military Health System that provides civilian health benefits for military personnel, military retirees and their dependents. TRICARE rebate accruals are included in chargeback accruals and are based on estimated Department of Defense eligible sales multiplied by the TRICARE rebate formula.

We record estimated reductions to revenue for free goods and volume-based discounts at the time of the initial sale. The estimated reductions to revenue for such free goods and volume-based discounts are based on the sales terms, historical experience and trend analysis. The cost of free goods is included in cost of goods sold (excluding amortization of acquired intangible assets).

We recognize revenue from royalties based on licensees' sales of our products or products using our technologies. Royalties are recognized as earned in accordance with the contract terms when royalties from licensees can be reasonably estimated and collectability is reasonably assured. If royalties cannot be reasonably estimated or collectability of a royalty amount is not reasonably assured, royalties are recognized as revenue when the cash is received.

Share-Based Compensation

Share-Based Compensation: We utilize share based compensation in the form of stock options, restricted stock units (RSUs) and performance-based restricted stock units (PSUs). Compensation expense is recognized in the Consolidated Statements of Income based on the estimated fair value of the awards at grant date. Compensation expense recognized reflects an estimate of the number of awards expected to vest after taking into consideration an estimate of award forfeitures based on actual experience and is recognized on a straight-line basis over the requisite service period, which is generally the vesting period required to obtain full vesting. Management expectations related to the achievement of performance goals associated with PSU grants is assessed regularly and that assessment is used to determine whether PSU grants are expected to vest. If performance-based milestones related to PSU grants are not met or not expected to be met, any compensation expense recognized to date associated with grants that are not expected to vest will be reversed.

The fair values of stock option grants are estimated as of the date of grant using a Black-Scholes option valuation model. The fair values of RSU and PSU grants that are not based on market performance are based on the market value of our Common Stock on the date of grant.

Earnings Per Share

Earnings Per Share: Basic earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the period, assuming potentially dilutive common shares resulting from option exercises, RSUs, PSUs, warrants and other incentives had been issued and any proceeds thereof used to repurchase common stock at the average market price during the period. The assumed proceeds used to repurchase common stock is the sum of the amount to be paid to us upon exercise of options, the amount of compensation cost attributed to future services and not yet recognized and, if applicable, the amount of excess income tax benefit that would be credited to paid-in capital upon exercise.

New Accounting Pronouncements

New Accounting Pronouncements: In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (ASU 2014-09). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under U.S. GAAP and requires revenue to be recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. Additionally, qualitative and quantitative disclosures are required about customer contracts, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. This accounting guidance is effective for us beginning in the first quarter of 2018 using one of two prescribed transition methods. We are currently evaluating the effect that the updated standard and transition method will have on our consolidated financial statements and related disclosures.

In April 2015, the FASB issued Accounting Standards Update No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs" (ASU 2015-03). ASU 2015-03 will more closely align the presentation of debt issuance costs under U.S. GAAP with the presentation under comparable IFRS standards by requiring that debt issuance costs be presented on the balance sheet as a direct deduction from the carrying amount of the related debt liability, similar to the presentation of debt discounts or premiums. This accounting guidance is effective for us beginning in the first quarter of 2016. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In April 2015, the FASB issued Accounting Standards Update No. 2015-05, "Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement" (ASU 2015-05). ASU 2015-05 provides guidance to help companies evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The new guidance clarifies that if a cloud computing arrangement includes a software license, the customer should account for the license consistent with its accounting for other software licenses. If the arrangement does not include a software license, the customer should account for the arrangement as a service contract. ASU 2015-05 is effective for us beginning in the first quarter of 2016. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In July 2015, the FASB issued Accounting Standards Update No. 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory" (ASU 2015-11). ASU 2015-11 applies only to inventory for which cost is determined by methods other than last-in, first-out and the retail inventory method, which includes inventory that is measured using first-in, first-out or average cost. Inventory within the scope of this standard is required to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The new standard will be effective for us on January 1, 2017. We are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures.

In August 2015, the FASB issued Accounting Standards Update No. 2015-15, "Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements" (ASU 2015-15). ASU 2015-15 clarifies the presentation and subsequent measurement of debt issuance costs associated with lines of credit. These costs may be presented as an asset and amortized ratably over the term of the line of credit arrangement, regardless of whether there are outstanding borrowings on the arrangement. The effective date will be the first quarter of fiscal year 2017 and will be applied retrospectively. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In September 2015, the FASB issued Accounting Standards Update No. 2015-16, "Simplifying the Accounting for Measurement-Period Adjustments" (ASU 2015-16). ASU 2015-16 replaces the requirement that an acquirer in a business combination account for measurement period adjustments retrospectively with a requirement that an acquirer recognize adjustments to the provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. ASU 2015-16 will be effective for us beginning in the first quarter of 2016. The guidance is to be applied prospectively to adjustments to provisional amounts that occur after the effective date of the guidance, with earlier application permitted for financial statements that have not been issued. We do not expect the adoption of this updated standard to have a material impact on our consolidated financial statements and related disclosures.

In November 2015, the FASB issued Accounting Standards Update No. 2015-17, "Balance Sheet Classification of Deferred Taxes" (ASU 2015-17). ASU 2015-17 requires companies to classify all deferred tax assets and liabilities and associated valuation allowances as non-current on the balance sheet instead of separating deferred taxes and associated valuation allowances into current and non-current amounts. The update may be adopted on either a prospective or retrospective basis with early adoption permitted. In order to simplify the presentation of deferred income taxes, we have chosen to adopt ASU 2015-17 in the fourth quarter of 2015 on a prospective basis. Prior periods were not retrospectively adjusted.

In January 2016, the FASB issued Accounting Standards Update 2016-01, "Financial Instruments–Overall: Recognition and Measurement of Financial Assets and Financial Liabilities" (ASU 2016-01). ASU 2016-01 changes accounting for equity investments, financial liabilities under the fair value option, and presentation and disclosure requirements for financial instruments. ASU 2016-01 does not apply to equity investments in consolidated subsidiaries or those accounted for under the equity method of accounting. In addition, the FASB clarified guidance related to the valuation allowance assessment when recognizing deferred tax assets resulting from unrealized losses on available-for-sale debt securities. Equity investments with readily determinable fair values will be measured at fair value with changes in fair value recognized in net income. Companies have the option to either measure equity investments without readily determinable fair values at fair value or at cost adjusted for changes in observable prices minus impairment. Changes in measurement under either alternative will be recognized in net income. Companies that elect the fair value option for financial liabilities must recognize changes in fair value related to instrument-specific credit risk in other comprehensive income. Companies must assess valuation allowances for deferred tax assets related to available-for-sale debt securities in combination with their other deferred tax assets. ASU 2016-01 will be effective for us beginning in the first quarter of 2018 and early adoption is available to publicly traded companies for the provision to record fair value changes for financial liabilities under the fair value option resulting from instrument-specific credit risk in other comprehensive income. We expect the implementation of this standard to have an impact on our consolidated financial statements and related disclosures, as we held publicly traded equity investments at December 31, 2015 with a fair value of $1.236 billion, as well as equity investments accounted for under the cost method. A cumulative-effect adjustment to the balance sheet will be recorded as of the beginning of the fiscal year of adoption. The implementation of ASU 2016-01 is expected to increase volatility in our net income as the volatility currently recorded in other comprehensive income related to changes in the fair market value of available for sale equity investments will be reflected in net income after adoption.

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Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of estimated useful lives of capitalized assets

The estimated useful lives of capitalized assets are as follows:

Buildings	40 years
Building and operating equipment	15 years
Manufacturing machinery and equipment	10 years
Other machinery and equipment	5 years
Furniture and fixtures	5 years
Computer equipment and software	3-7 years

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Acquisitions (Tables)

12 Months Ended

Dec. 31, 2015

Receptos

Business Acquisition [Line Items]

Schedule of fair value of consideration transferred

The total cash consideration for the acquisition of Receptos is summarized as follows:

	Total Consideration
Cash paid for outstanding common stock	$	7,311.3
Cash for equity compensation attributable to pre-combination service	314.9
Total consideration	$	7,626.2

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The preliminary purchase price allocation resulted in the following amounts being allocated to the assets acquired and liabilities assumed at the acquisition date based upon their respective preliminary fair values summarized below. During the fourth quarter of 2015, adjustments have been recorded to increase the amounts initially recorded for deferred tax assets, deferred tax liabilities and goodwill as of the Acquisition Date. The amounts recognized will be finalized as the information necessary to complete the analyses is obtained, but no later than one year from the Acquisition Date.

	Amounts Recognized as of the Acquisition Date (Provisional)
Working capital (1)	$	479.2
Property, plant and equipment	5.0
In-process research and development product rights	6,842.0
Current deferred tax assets	241.3
Other non-current assets	7.9
Non-current deferred tax liabilities(2)	(2,519.2		)
Total identifiable net assets	5,056.2
Goodwill	2,570.0
Total net assets acquired	$	7,626.2

⁽¹⁾  Includes cash and cash equivalents, available-for-sale marketable securities, other current assets, accounts payable and other current liabilities.

Schedule of Included Business Acquisition Expenses

From the Acquisition Date through December 31, 2015, our Consolidated Statements of Income included expenses of $380.5 million associated with the acquisition and operations of Receptos as follows⁽¹⁾:

Statements of Income Location	Acquisition Date Through December 31, 2015
Research and development	$	78.6
Selling, general and administrative	5.1
Acquisition related charges and restructuring, net (2)	296.8
Total	$	380.5

⁽¹⁾ In addition, Celgene incurred $19.9 million of acquisition related costs prior to the acquisition date.

⁽²⁾ Consists of acquisition-related compensation expense and transaction costs.

Business Acquisition, Pro Forma Information

The following table provides unaudited pro forma financial information for the twelve-month periods ended December 31, 2015 and 2014 as if the acquisition of Receptos had occurred on January 1, 2014.

	Twelve-Month Periods Ended December 31,
	2015		2014
Total revenue	$	9,256.0	$	7,676.3
Net income	$	1,630.8	$	1,499.9
Net income per common share: basic	$	2.06	$	1.87
Net income per common share: diluted	$	1.98	$	1.79

Quanticel

Business Acquisition [Line Items]

Schedule of fair value of consideration transferred

The fair value of consideration transferred in the acquisition of Quanticel is shown in the table below:

	Fair Value at the Acquisition Date
Cash	$	95.9
Fair value of pre-existing equity ownership	11.4
Contingent consideration	166.0
Total fair value of consideration	$	273.3

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The preliminary purchase price allocation resulted in the following amounts being allocated to the assets acquired and liabilities assumed at the acquisition date based upon their respective preliminary fair values summarized below. The amounts recognized will be finalized as the information necessary to complete the analyses is obtained, but no later than one year from the acquisition date.

	Fair Value at October 19, 2015 (Provisional)
Working capital (1)	$	7.0
Property, plant and equipment	1.9
Other non-current assets	0.8
Technology platform intangible asset(2)	232.0
Debt obligations	(13.9		)
Non-current deferred tax liabilities	(72.3		)
Total identifiable net assets	155.5
Goodwill	117.8
Total net assets acquired	$	273.3

⁽¹⁾  Includes cash and cash equivalents, available-for-sale marketable securities, other current assets, accounts payable and other current liabilities.

⁽²⁾ Technology platform related to Quanticel’s proprietary technology platform for the single-cell genomic analysis of human cancer.

Nogra Pharma Limited

Business Acquisition [Line Items]

Schedule of fair value of consideration transferred

The fair value of consideration transferred to acquire the license amounted to:

	Fair Value at the Acquisition Date
Cash	$	710.0
Contingent consideration	1,060.0
Total fair value of consideration	$	1,770.0

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The purchase price allocation resulted in the following amounts being allocated to the assets acquired at the acquisition date based on their respective fair values:

	Fair Value at the Acquisition Date
In-process research and development product rights	$	1,620.0
Current deferred tax assets	1.3
Non-current deferred tax liabilities, net	(1.3		)
Total identifiable net assets	1,620.0
Goodwill	150.0
Total net assets acquired	$	1,770.0

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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Schedule of earnings per share

	2015		2014		2013
Net income	$	1,602.0	$	1,999.9	$	1,449.9
Weighted-average shares:
Basic	792.2		802.7		827.7
Effect of dilutive securities:
Options, RSUs, PSUs, warrants and other	32.7		33.3		32.9
Diluted	824.9		836.0		860.6
Net income per share:
Basic	$	2.02	$	2.49	$	1.75
Diluted	$	1.94	$	2.39	$	1.68

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Financial Instruments and Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on recurring basis

	Balance at December 31, 2015			Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	$	1,671.6		$	1,235.9		$	435.7		$	—
Forward currency contracts	606.0			—			606.0			—
Purchased currency options	46.7			—			46.7			—
Interest rate swaps	52.5			—			52.5			—
Total assets	$	2,376.8		$	1,235.9		$	1,140.9		$	—
Liabilities:
Contingent value rights	$	(51.9	)	$	(51.9	)	$	—		$	—
Written currency options	(19.1		)	—			(19.1		)	—
Other acquisition related contingent consideration	(1,521.5		)	—			—			(1,521.5		)
Total liabilities	$	(1,592.5	)	$	(51.9	)	$	(19.1	)	$	(1,521.5	)

	Balance at December 31, 2014			Quoted Price in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	$	3,425.1		$	1,051.3		$	2,373.8		$	—
Forward currency contracts	550.7			—			550.7			—
Purchased currency options	9.8			—			9.8			—
Interest rate swaps	20.0			—			20.0			—
Total assets	$	4,005.6		$	1,051.3		$	2,954.3		$	—
Liabilities:
Contingent value rights	$	(136.3	)	$	(136.3	)	$	—		$	—
Written currency options	(4.6		)	—			(4.6		)	—
Other acquisition related contingent consideration	(1,279.0		)	—			—			(1,279.0		)
Total liabilities	$	(1,419.9	)	$	(136.3	)	$	(4.6	)	$	(1,279.0	)

Roll-forward of fair value of Level 3 instruments (significant unobservable inputs), liabilities

The following table represents a roll-forward of the fair value of Level 3 instruments:

	2015			2014
Liabilities:
Balance at beginning of period	$	(1,279.0	)	$	(228.5	)
Amounts acquired or issued	(166.0		)	(1,060.0		)
Net change in fair value	(76.5		)	(30.5		)
Settlements	—			40.0
Transfers in and/or out of Level 3	—			—
Balance at end of period	$	(1,521.5	)	$	(1,279.0	)

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Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2015

Derivative [Line Items]

Schedule of fair value and balance sheet location of derivative instruments

The following table summarizes the fair value and presentation in the Consolidated Balance Sheets for derivative instruments as of December 31, 2015 and 2014:

		December 31, 2015
		Fair Value
Instrument	Balance Sheet Location	Asset Derivatives		Liability Derivatives
Derivatives designated as hedging instruments:
Foreign exchange contracts1	Other current assets	$	356.2	$	18.0
	Other non-current assets	287.8		28.0
Interest rate swap agreements	Other current assets	30.7		—
	Other non-current assets	26.1		4.7
	Other non-current liabilities	0.2		0.9
Derivatives not designated as hedging instruments:
Foreign exchange contracts1	Other current assets	46.0		5.9
	Other current liabilities	2.9		7.4
Interest rate swap agreements	Other current assets	2.4		2.3
	Other non-current assets	2.4		1.4
Total		$	754.7	$	68.6

		December 31, 2014
		Fair Value
Instrument	Balance Sheet Location	Asset Derivatives		Liability Derivatives
Derivatives designated as hedging instruments:
Foreign exchange contracts1	Other current assets	$	264.9	$	44.9
	Other current liabilities	0.1		1.7
	Other non-current assets	322.3		17.5
Interest rate swap agreements	Other current assets	17.9		—
	Other non-current assets	4.8		0.3
	Other non-current liabilities	—		3.8
Derivatives not designated as hedging instruments:
Foreign exchange contracts1	Other current assets	39.7		6.0
	Other current liabilities	0.1		1.1
Interest rate swap agreements	Other current assets	0.1		—
	Other non-current assets	1.3		—
Total		$	651.2	$	75.3

¹Derivative instruments in this category are subject to master netting arrangements and are presented on a net basis in the Consolidated Balance Sheets in accordance with ASC 210-20.

Schedule of effect of derivative instruments not designated as hedging instruments on Consolidated Statements of Income

The following table summarizes the effect of derivative instruments not designated as hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain (Loss) Recognized in Income on Derivative
Instrument		2015			2014
Foreign exchange contracts	Other income, net	$	81.2		$	79.3
Put options sold	Other income, net	$	(9.9	)	$	11.6

Cash flow hedges

Derivative [Line Items]

Schedule of effect of derivative instruments designated as hedging instruments on Consolidated Statements of Income

The following table summarizes the effect of derivative instruments designated as cash-flow hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	2015
	(Effective Portion)							(Ineffective Portion and Amount Excluded From Effectiveness Testing)
Instrument	Amount of Gain/(Loss) Recognized in OCI on Derivative1			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative
Foreign exchange contracts	$	429.4		Net product sales	$	354.4		Other income, net	$	20.0		2
Treasury rate lock agreements	$	(27.9	)	Interest expense	$	(4.2	)	Other income, net	$	(0.2	)	3
Forward starting interest rate swaps	$	9.0		Interest expense	$	(1.5	)	Other income, net	$	0.3		3

¹  Net gains of $364.8 million are expected to be reclassified from Accumulated OCI into income in the next 12 months.

²  The amount of net gains recognized in income represents $23.0 million of gains related to amounts excluded from the assessment of hedge effectiveness (fair value adjustments of forward point amounts) and $3.0 million in losses related to the ineffective portion of the hedging relationships.

³  The amount of net (loss) gain recognized in income relates to the ineffective portion of the hedging relationships.

	2014
	(Effective Portion)							(Ineffective Portion and Amount Excluded From Effectiveness Testing)
Instrument	Amount of Gain/(Loss) Recognized in OCI on Derivative1			Location of Gain/(Loss) Reclassified from Accumulated OCI into Income	Amount of Gain/(Loss) Reclassified from Accumulated OCI into Income			Location of Gain/(Loss) Recognized in Income on Derivative	Amount of Gain/(Loss) Recognized in Income on Derivative
Foreign exchange contracts	$	600.4		Net product sales	$	27.5		Other income, net	$	(12.2	)	1
Treasury rate lock agreements	$	—		Interest expense	$	(3.5	)
Forward starting interest rate swaps	$	(32.3	)	Interest expense	$	(0.9	)	Other income, net	(3.6		)	2

¹  The amount of net gain recognized in income represents $18.0 million in losses related to amounts excluded from the assessment of hedge effectiveness (fair value adjustments of forward point amounts) and $5.8 million of gains related to the ineffective portion of the hedging relationships.

²  The amount of net loss recognized in income relates to the ineffective portion of the hedging relationships.

The following table summarizes the effect of derivative instruments designated as fair value hedging instruments on the Consolidated Statements of Income for the years ended December 31, 2015 and 2014:

	Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain (Loss) Recognized in Income on Derivative
Instrument		2015		2014
Interest rate swaps	Interest expense	$	60.3	$	43.0

Foreign currency forward contracts

Derivative [Line Items]

Schedule of notional amount of foreign currency forward contracts

Foreign currency forward contracts entered into to hedge forecasted revenue and expenses were as follows at December 31, 2015 and December 31, 2014:

	Notional Amount
Foreign Currency:	2015		2014
Australian Dollar	$	45.1	$	18.8
British Pound	289.3		304.8
Canadian Dollar	135.9		43.7
Euro	2,934.3		3,375.7
Japanese Yen	510.4		541.1
Total	$	3,915.0	$	4,284.1

Foreign exchange option contracts

Derivative [Line Items]

Foreign currency option contracts entered into to hedge forecasted revenue and expenses

Outstanding foreign currency option contracts entered into to hedge forecasted revenue were as follows at December 31, 2015 and 2014:

	Notional Amount1
	2015		2014
Foreign currency option contracts designated as hedging activity:
Purchased Put	$	641.5	$	152.6
Written Call	$	690.0	$	160.9

¹ U.S. dollar notional amounts are calculated as the hedged local currency amount multiplied by the strike value of the foreign currency option. The local currency notional amounts of our purchased put and written call that are designated as hedging activities are equal to each other.

Interest rate swaps

Derivative [Line Items]

Schedule of notional amount of foreign currency forward contracts

The following table summarizes the notional amounts of our outstanding interest rate swap contracts at December 31, 2015 and December 31, 2014: 

	Notional Amount
	2015		2014
Interest rate swap contracts entered into as fair value hedges of the following fixed-rate senior notes:
2.450% senior notes due 2015	$	—	$	300.0
1.900% senior notes due 2017	300.0		300.0
2.300% senior notes due 2018	200.0		200.0
2.250% senior notes due 2019	500.0		500.0
3.950% senior notes due 2020	500.0		500.0
3.250% senior notes due 2022	1,000.0		750.0
4.000% senior notes due 2023	700.0		150.0
3.625% senior notes due 2024	100.0		—
3.875% senior notes due 2025	250.0		—
Total	$	3,550.0	$	2,700.0

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Cash, Cash Equivalents and Marketable Securities Available-for-Sale (Tables)

12 Months Ended

Dec. 31, 2015

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Schedule of available-for-sale securities by major security type and class

The amortized cost, gross unrealized holding gains, gross unrealized holding losses and estimated fair value of available-for-sale securities by major security type and class of security at December 31, 2015 and 2014 were as follows:

December 31, 2015	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
U.S. Treasury securities	$	153.0	$	—	$	(0.4	)	$	152.6
U.S. government-sponsored agency MBS	29.8		0.1		(0.4		)	29.5
Corporate debt – global	219.7		—		(1.6		)	218.1
Asset backed securities	35.6		—		(0.1		)	35.5
Marketable equity securities	811.5		468.1		(43.7		)	1,235.9
Total available-for-sale marketable securities	$	1,249.6	$	468.2	$	(46.2	)	$	1,671.6

December 31, 2014	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
U.S. Treasury securities	$	1,044.7	$	0.3	$	(0.8	)	$	1,044.2
U.S. government-sponsored agency securities	145.1		0.1		(0.1		)	145.1
U.S. government-sponsored agency MBS	531.1		1.0		(2.7		)	529.4
Non-U.S. government, agency and supranational securities	32.4		—		(0.1		)	32.3
Corporate debt – global	446.3		0.6		(1.2		)	445.7
Asset backed securities	177.3		—		(0.2		)	177.1
Marketable equity securities	335.2		716.3		(0.2		)	1,051.3
Total available-for-sale marketable securities	$	2,712.1	$	718.3	$	(5.3	)	$	3,425.1

Schedule of available-for-sale securities in an unrealized loss position for less than and longer than 12 months

The fair value of all available-for-sale securities, which have been in an unrealized loss position for less than and longer than 12 months at December 31, 2015, was as follows:

	Less than 12 months					12 months or longer					Total
December 31, 2015	Estimated Fair Value		Gross Unrealized Loss			Estimated Fair Value		Gross Unrealized Loss			Estimated Fair Value		Gross Unrealized Loss
U.S. Treasury securities	$	143.6	$	(0.4	)	$	—	$	—		$	143.6	$	(0.4	)
U.S. government-sponsored agency MBS	12.8		(0.3		)	6.8		(0.1		)	19.6		(0.4		)
Corporate debt – global	193.5		(1.6		)	—		—			193.5		(1.6		)
Asset backed securities	29.6		(0.1		)	5.9		—			35.5		(0.1		)
Marketable equity securities	494.4		(43.7		)	—		—			494.4		(43.7		)
Total	$	873.9	$	(46.1	)	$	12.7	$	(0.1	)	$	886.6	$	(46.2	)

Schedule of duration periods of available-for-sale debt securities

Duration periods of available-for-sale debt securities at December 31, 2015 were as follows:

	Amortized Cost		Fair Value
Duration of one year or less	$	58.4	$	58.3
Duration of one through three years	363.7		361.8
Duration of three through five years	15.9		15.6
Total	$	438.0	$	435.7

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Inventory (Tables)

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Summary of inventories by major category

A summary of inventories by major category at December 31, 2015 and 2014 follows:

	2015		2014
Raw materials	$	201.3	$	200.0
Work in process	120.0		101.5
Finished goods	122.1		91.6
Total	$	443.4	$	393.1

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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment, Net [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Land	$	75.4	$	37.9
Buildings	274.1		260.8
Building and operating equipment	33.1		32.0
Leasehold improvements	152.3		135.5
Machinery and equipment	246.6		213.5
Furniture and fixtures	53.2		48.8
Computer equipment and software	389.6		332.8
Construction in progress	221.3		104.8
Subtotal	1,445.6		1,166.1
Less accumulated depreciation and amortization	631.5		523.5
Total	$	814.1	$	642.6

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Other Financial Information (Tables)

12 Months Ended

Dec. 31, 2015

Other Financial Information

Schedule of accrued expenses

Accrued expenses at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Compensation	$	297.8	$	285.2
Rebates, distributor chargebacks and distributor services	365.5		232.9
Clinical trial costs and grants	255.1		189.5
Interest	170.3		59.1
Royalties, license fees and collaboration agreements	75.9		26.7
Commercial related activities	38.7		56.2
Sales returns	18.8		10.2
Rent	18.1		14.0
Professional services	14.9		7.9
Other taxes	7.9		9.3
Other	113.7		100.1
Total	$	1,376.7	$	991.1

Schedule of other current liabilities

Other current liabilities at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Deferred tax liability	$	—	$	131.2
Contingent consideration – Quanticel acquisition	82.5		—
Contingent consideration – Nogra acquisition	24.9		24.7
Contingent consideration – Avila acquisition	2.0		9.8
Compensation	55.6		32.6
Sales, use and value added tax	61.1		56.8
Derivative contracts	4.5		2.6
Collaboration agreement upfront payable	40.3		14.0
Other	0.1		4.1
Total	$	271.0	$	275.8

Schedule of other non-current liabilities

Other non-current liabilities at December 31, 2015 and 2014 consisted of the following:

	2015		2014
Contingent consideration – Quanticel acquisition	$	84.2	$	—
Contingent consideration – Nogra acquisition	1,214.5		1,110.8
Contingent consideration – Avila acquisition	94.5		114.2
Contingent consideration – Gloucester acquisition	18.9		19.5
Contingent Value Rights - Abraxis acquisition	51.9		136.3
Deferred compensation and long-term incentives	170.5		150.5
Deferred tax liability	377.7		555.6
Other	29.5		49.8
Total	$	2,041.7	$	2,136.7

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Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

Intangible assets outstanding as of December 31, 2015 and December 31, 2014 are summarized as follows:

December 31, 2015	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,448.3	)	$	1,957.6
Technology	565.7		(197.1		)	368.6
Licenses	66.7		(22.3		)	44.4
Other	44.0		(27.1		)	16.9
	4,082.3		(1,694.8		)	2,387.5
Non-amortized intangible assets:
Acquired IPR&D product rights	8,470.6		—			8,470.6
Total intangible assets	$	12,552.9	$	(1,694.8	)	$	10,858.1

December 31, 2014	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,234.1	)	$	2,171.8
Technology	333.7		(135.1		)	198.6
Licenses	67.0		(18.1		)	48.9
Other	42.5		(22.9		)	19.6
	3,849.1		(1,410.2		)	2,438.9
Non-amortized intangible assets:
Acquired IPR&D product rights	1,628.7		—			1,628.7
Total intangible assets	$	5,477.8	$	(1,410.2	)	$	4,067.6

Schedule of indefinite-lived intangible assets

Intangible assets outstanding as of December 31, 2015 and December 31, 2014 are summarized as follows:

December 31, 2015	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,448.3	)	$	1,957.6
Technology	565.7		(197.1		)	368.6
Licenses	66.7		(22.3		)	44.4
Other	44.0		(27.1		)	16.9
	4,082.3		(1,694.8		)	2,387.5
Non-amortized intangible assets:
Acquired IPR&D product rights	8,470.6		—			8,470.6
Total intangible assets	$	12,552.9	$	(1,694.8	)	$	10,858.1

December 31, 2014	Gross Carrying Value		Accumulated Amortization			Intangible Assets, Net
Amortizable intangible assets:
Acquired developed product rights	$	3,405.9	$	(1,234.1	)	$	2,171.8
Technology	333.7		(135.1		)	198.6
Licenses	67.0		(18.1		)	48.9
Other	42.5		(22.9		)	19.6
	3,849.1		(1,410.2		)	2,438.9
Non-amortized intangible assets:
Acquired IPR&D product rights	1,628.7		—			1,628.7
Total intangible assets	$	5,477.8	$	(1,410.2	)	$	4,067.6

Schedule of changes in carrying value of goodwill

The change in carrying value of goodwill is summarized as follows:

Balance at December 31, 2014	$	2,191.2
Acquisition of Receptos	2,570.0
Acquisition of Quanticel	117.8
Balance at December 31, 2015	$	4,879.0

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Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Schedule of Short-term Debt

The carrying value of short-term borrowings and current portion of long-term debt outstanding at December 31, 2015 and December 31, 2014 includes:

	2015		2014
Commercial paper	$	—	$	99.6
2.450% senior notes due 2015	—		506.3
Total	$	—	$	605.9

Carrying values of the senior notes

The carrying values of the long-term portion of these senior notes at December 31, 2015 and 2014 are summarized below:

	2015		2014
1.900% senior notes due 2017	$	501.2	$	501.0
2.125% senior notes due 2018	999.9		—
2.300% senior notes due 2018	401.7		401.2
2.250% senior notes due 2019	505.1		502.5
2.875% senior notes due 2020	1,497.5		—
3.950% senior notes due 2020	507.1		502.8
3.250% senior notes due 2022	1,016.1		1,010.2
3.550% senior notes due 2022	997.4		—
4.000% senior notes due 2023	710.3		708.5
3.625% senior notes due 2024	1,001.7		996.8
3.875% senior notes due 2025	2,475.6		—
5.700% senior notes due 2040	249.6		249.5
5.250% senior notes due 2043	396.7		396.7
4.625% senior notes due 2044	996.6		996.5
5.000% senior notes due 2045	1,993.9		—
Total long-term debt	$	14,250.4	$	6,265.7

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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Summary of changes in common stock issued and treasury stock

A summary of changes in common stock issued and treasury stock is presented below (in millions of shares):

	Common Stock	Common Stock in Treasury
December 31, 2012	880.9	(78.7	)
Exercise of stock options and conversion of restricted stock units	25.0	(0.5	)
Issuance of common stock for employee benefit plans	0.6	—
Shares repurchased under share repurchase program	—	(22.3	)
December 31, 2013	906.5	(101.5	)
Exercise of stock options and conversion of restricted stock units	18.3	(1.3	)
Issuance of common stock for employee benefit plans	—	0.2
Shares repurchased under share repurchase program	—	(22.0	)
December 31, 2014	924.8	(124.6	)
Exercise of stock options and conversion of restricted stock units	15.3	(1.2	)
Issuance of common stock for employee benefit plans	—	0.4
Shares repurchased under share repurchase program	—	(28.1	)
December 31, 2015	940.1	(153.5	)

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Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Summary of other comprehensive income (loss)

The accumulated balances related to each component of other comprehensive income (loss), net of tax, are summarized as follows:

	Pension Liability			Net Unrealized Gains (Losses) From Marketable Securities			Net Unrealized Gains (Losses) From Hedges			Foreign Currency Translation Adjustment			Total Accumulated Other Comprehensive Income (Loss)
Balance December 31, 2013	$	(6.9	)	$	137.3		$	(36.0	)	$	(0.4	)	$	94.0
Other comprehensive income (loss) before reclassifications	(8.6		)	320.1			580.4			(49.8		)	842.1
Amount reclassified from accumulated other comprehensive income	—			3.5			(24.8		)	—			(21.3		)
Net current-period other comprehensive income (loss)	(8.6		)	323.6			555.6			(49.8		)	820.8
Balance December 31, 2014	$	(15.5	)	$	460.9		$	519.6		$	(50.2	)	$	914.8
Other comprehensive income (loss) before reclassifications	1.6			(204.6		)	417.7			(26.1		)	188.6
Amount reclassified from accumulated other comprehensive income	—			15.2			(350.9		)	—			(335.7		)
Net current-period other comprehensive income (loss)	1.6			(189.4		)	66.8			(26.1		)	(147.1		)
Balance December 31, 2015	$	(13.9	)	$	271.5		$	586.4		$	(76.3	)	$	767.7

Reclassification out of Accumulated Other Comprehensive Income

		Gains (Losses) Reclassified Out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Components	Affected Line Item in the Consolidated Statements of Income	Years Ended December 31,
		2015			2014			2013
Gains (losses) from cash-flow hedges:
Foreign exchange contracts	Net product sales	$	354.4		$	27.5		$	10.7
Treasury rate lock agreements	Interest (expense)	(4.2		)	(3.5		)	(3.4		)
Interest rate swap agreements	Interest (expense)	(1.5		)	(0.9		)	—
	Income tax benefit	2.2			1.7			6.9
Gains (losses) from available-for-sale marketable securities:
Realized income (loss) on sales of marketable securities	Interest and investment income, net	(23.4		)	(5.4		)	(7.3		)
	Income tax benefit	8.2			1.9			2.2
Total reclassification, net of tax		$	335.7		$	21.3		$	9.1

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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Components of share-based compensation expense

The following table summarizes the components of share-based compensation expense in the Consolidated Statements of Income for the years ended December 31, 2015, 2014 and 2013:

	2015		2014		2013
Cost of goods sold	$	31.7	$	26.2	$	18.5
Research and development	250.7		196.5		144.7
Selling, general and administrative	294.2		224.9		162.6
Total share-based compensation expense	576.6		447.6		325.8
Tax benefit related to share-based compensation expense	161.2		129.3		94.5
Reduction in income	$	415.4	$	318.3	$	231.3

Schedule of assumptions used in the estimation of fair value of options granted

We estimated the fair value of options granted using a Black-Scholes option pricing model with the following assumptions:

	2015	2014	2013
Risk-free interest rate	1.17% - 1.72%	1.51% - 1.90%	0.68% - 1.70%
Expected volatility	31% - 38%	28% - 37%	27% - 35%
Weighted average expected volatility	34%	33%	31%
Expected term (years)	5.02 - 5.04	5.02 - 5.06	5.03 - 5.50
Expected dividend yield	0%	0%	0%

Schedule of stock option activity

The following table summarizes all stock option activity for the year ended December 31, 2015:

	Options		Weighted Average Exercise Price Per Option		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In Millions)
Outstanding at December 31, 2014	77.2		$	49.47	6.9	$	4,823.8
Changes during the Year:
Granted	11.8		118.65
Exercised	(11.5	)	34.39
Forfeited	(1.7	)	74.20
Expired	(0.1	)	39.48
Outstanding at December 31, 2015	75.7		$	61.99	6.6	$	4,411.8
Vested at December 31, 2015 or expected to vest in the future	75.1		$	61.64	6.6	$	4,400.1
Vested at December 31, 2015	41.2		$	41.12	5.3	$	3,238.5

Schedule of restricted stock units

Information regarding the Company's RSUs for the year ended December 31, 2015 is as follows:

Nonvested RSUs	Share Equivalent		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2014	9.4		$	59.02
Changes during the period:
Granted	2.5		112.98
Vested	(3.8	)	37.57
Forfeited	(0.4	)	71.95
Nonvested at December 31, 2015	7.7		$	86.28

Schedule of performance-based restricted stock units

The following table summarizes the Company's performance-based restricted stock unit activity for the year ended December 31, 2015 (shares in thousands):

Nonvested Performance-Based RSUs	Share Equivalent		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2014	133		$	69.57
Changes during the period:
Granted	211		112.14
Vested	—		—
Forfeited	(10	)	82.91
Non-vested at December 31, 2015	334		$	96.07

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of income (loss) before income taxes

Income before income taxes is as follows:

	2015		2014		2013
U.S.	$	524.8	$	565.0	$	36.8
Non-U.S.	1,498.7		1,762.4		1,628.6
Income before income taxes	$	2,023.5	$	2,327.4	$	1,665.4

Schedule of provision (benefit) for taxes on income

The provision (benefit) for taxes on income is as follows:

	2015			2014			2013
United States:
Taxes currently payable:
Federal	$	320.7		$	489.4		$	352.6
State and local	63.1			56.3			45.4
Deferred income taxes	(28.7		)	(273.8		)	(245.1		)
Total U.S. tax provision	355.1			271.9			152.9
International:
Taxes currently payable	71.1			54.1			64.1
Deferred income taxes	(4.7		)	1.5			(1.5		)
Total international tax provision	66.4			55.6			62.6
Total provision	$	421.5		$	327.5		$	215.5

Schedule of tax effects of temporary differences that give rise to deferred tax assets and liabilities

At December 31, 2015 and 2014 the tax effects of temporary differences that give rise to deferred tax assets and liabilities were as follows:

	2015						2014
	Assets			Liabilities			Assets			Liabilities
NOL carryforwards	$	56.2		$	—		$	4.5		$	—
Deferred revenue	1.8			—			1.7			—
Capitalized research expenses	3.8			—			4.8			—
Tax credit carryforwards	10.7			—			5.0			—
Non-qualified stock options	340.9			—			250.5			—
Plant and equipment, primarily differences in depreciation	2.0			—			—			(7.4		)
Inventory	11.3			—			14.5			—
Other assets	43.0			(3.7		)	41.5			(4.0		)
Intangible assets	661.3			(1,135.4		)	654.7			(1,183.2		)
Accrued and other expenses	233.2			—			191.6			—
Unremitted earnings	—			(316.5		)	—			(316.5		)
Unrealized (gains) losses on securities	—			(129.9		)	—			(236.5		)
Subtotal	1,364.2			(1,585.5		)	1,168.8			(1,747.6		)
Valuation allowance	(90.8		)	—			(39.7		)	—
Total deferred taxes	$	1,273.4		$	(1,585.5	)	$	1,129.1		$	(1,747.6	)
Net deferred tax asset (liability)				$	(312.1	)				$	(618.5	)

Schedule of deferred tax assets and liabilities classified on the company's balance sheet

At December 31, 2015 and 2014, deferred tax assets and liabilities were classified on our Consolidated Balance Sheets as follows:

	2015			2014
Current assets(1)	$	—		$	11.7
Other assets (non-current)	65.6			56.6
Current liabilities(1)	—			(131.2		)
Other non-current liabilities	(377.7		)	(555.6		)
Net deferred tax asset (liability)	$	(312.1	)	$	(618.5	)

Reconciliation of U.S. statutory income tax rate to company's effective tax rate for continuing operations

Reconciliation of the U.S. statutory income tax rate to the Company's effective tax rate is as follows:

Percentages	2015		2014		2013
U.S. statutory rate	35.0	%	35.0	%	35.0	%
Foreign tax rate differences	(21.0	)%	(22.3	)%	(28.8	)%
Unremitted earnings	—	%	—	%	—	%
State taxes, net of federal benefit	1.2	%	1.0	%	0.6	%
Change in valuation allowance	2.0	%	0.2	%	1.2	%
Acquisition related differences	4.5	%	(0.3	)%	3.7	%
Changes in uncertain tax positions	(0.5	)%	(0.4	)%	0.8	%
Other	(0.4	)%	0.9	%	0.4	%
Effective income tax rate	20.8	%	14.1	%	12.9	%

Reconciliation of beginning and ending amount of unrecognized tax benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	2015			2014
Balance at beginning of year	$	251.8		$	219.2
Increases related to prior year tax positions	—			2.8
Decreases related to prior year tax positions	—			—
Increases related to current year tax positions	84.8			44.4
Settlements	—			(10.0		)
Lapse of statute	(10.8		)	(4.6		)
Balance at end of year	$	325.8		$	251.8

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Collaboration Agreements (Tables)

12 Months Ended

Dec. 31, 2015

Collaboration Agreements

Schedule of Collaboration Agreements

Summarized financial information related to our collaboration agreements is presented below:

		Year ended December 31,										As of December 31,1
		Research and Development Expense
		Upfront Fees		Milestones		Extension/ Termination of Agreements		Amortization of Prepaid Research and Development		Equity Investments Made DuringPeriod		Intangible Asset Balance		Equity Investment Balance		Percentage of Outstanding Equity
Acceleron	2015	$	—	$	—	$	—	$	—	$	—	$	—	$	224.9	14	%
	2014	—		—		—		—		52.4		—		179.7		14	%
	2013	—		17.0		—		—		10.0
	2012 and prior	70.0		27.5		—		—		30.5
Acetylon	2015	—		—		—		20.2		15.0		0.2		30.0		14	%
	2014	—		—		—		15.3		—		20.4		25.0		10	%
	2013	50.0		—		—		4.3		10.0
	2012 and prior	—		—		—		—		15.0
Agios	2015	9.0		—		—		—		—		1.0		340.4		13	%
	2014	—		—		20.0		—		38.3		—		587.4		14	%
	2013	—		—		20.0		—		12.8
	2012 and prior	121.2		—		20.0		—		37.5
AstraZeneca	2015	450.0		—		—		—		—		—		N/A		N/A
bluebird	2015	—		—		—		4.9		—		20.2		N/A		N/A
	2014	—		—		—		0.1		—		0.1		N/A		N/A
	2013	74.7		—		—		—		—
Epizyme	2015	—		—		10.0		—		—		—		58.9		9	%
	2014	—		—		—		—		9.9		—		69.3		11	%
	2013	—		25.0		—		—		1.0
	2012	65.0		—		—		—		25.0
FORMA	2015	59.0		—		—		—		—		0.1		N/A		N/A
	2014	225.0		—		—		0.1		—		0.1		N/A		N/A
	2013	52.8		—		—		—		—
Juno	2015	575.1		—		—		—		424.9		—		401.8		9	%
Lycera	2015	87.0		—		—		—		10.0		3.0		10.0		8	%
NantBioScience2	2015	—		—		—		—		—		—		90.0		13	%
	2014	50.0		—		—		—		90.0		—		90.0		14	%
Nurix	2015	149.8		—		—		—		17.0		0.2		17.0		11	%
OncoMed	2015	2.5		70.0		—		—		—		—		33.1		5	%
	2014	2.5		—		—		—		—		—		32.0		5	%
	2013	155.0		—		—		—		22.2

		Year ended December 31,					As of December 31,1
		Research and Development Expense
		Upfront Fees	Milestones	Extension/ Termination of Agreements	Amortization of Prepaid Research and Development	Equity Investments Made During Period	Intangible Asset Balance	Equity Investment Balance	Percentage of Outstanding Equity
Sutro	2015	—	—	—	4.8	—	22.9	17.6	16	%
	2014	72.6	—	—	0.2	11.9	12.8	17.6	15	%
	2013	—	—	—	2.1	1.7
	2012	26.3	—	—	0.2	4.0
Other Collaboration Arrangements	2015	69.8	8.0	8.1	0.9	50.0	25.0	105.4	N/A
	2014	103.5	8.3	—	7.5	55.7	34.4	132.7	N/A
	2013	243.3	1.0	—	0.9	71.7

¹ Year-end balance and percentage of outstanding equity are presented for the current and prior year.

²$25.0 million of expense related to the settlement of contingent matching contributions was also recognized in 2014 at the inception of the collaboration agreement with NantBioScience and included in Selling, General and Administrative expense.

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments under non-cancelable operating leases

Future minimum lease payments under non-cancelable operating leases as of December 31, 2015 are:

	Operating Leases
2016	$	56.1
2017	47.9
2018	35.1
2019	24.1
2020	19.6
Thereafter	49.5
Total minimum lease payments	$	232.3

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Geographic and Product Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Schedule of revenues and long-lived assets by geographic area

Revenues	2015		2014		2013
United States	$	5,604.0	$	4,482.8	$	3,862.1
Europe	2,624.3		2,310.8		1,865.7
All other	1,027.7		876.8		766.1
Total revenues	$	9,256.0	$	7,670.4	$	6,493.9

Long-Lived Assets1	2015		2014
United States	$	585.5	$	406.1
Europe	215.2		222.2
All other	13.4		14.3
Total long lived assets	$	814.1	$	642.6

¹  Long-lived assets consist of net property, plant and equipment.

Schedule of total revenues from external customers by product

Total revenues from external customers by product for the years ended December 31, 2015, 2014 and 2013 were as follows:

	2015		2014		2013
REVLIMID®	$	5,801.1	$	4,980.0	$	4,280.3
ABRAXANE®	967.5		848.2		648.9
POMALYST®/IMNOVID®	983.3		679.7		305.4
OTEZLA®	471.7		69.8		—
VIDAZA®	590.7		611.9		803.3
azacitidine for injection	83.9		78.2		23.3
THALOMID®	185.4		221.2		244.5
ISTODAX®	69.1		65.6		54.0
Other	8.4		9.2		2.6
Total net product sales	9,161.1		7,563.8		6,362.3
Other revenue	94.9		106.6		131.6
Total revenue	$	9,256.0	$	7,670.4	$	6,493.9

Schedule of customer concentration risk based on total revenues and net accounts receivable

The percentage of amounts due from these customers compared to total net accounts receivable is also summarized below as of December 31, 2015 and 2014.

	Percent of Total Revenue						Percent of Net Accounts Receivable
Customer	2015		2014		2013		2015		2014
Amerisource Bergen Corp.	8.1	%	9.0	%	10.7	%	8.2	%	9.7	%
CVS	10.7	%	9.8	%	9.3	%	8.2	%	7.6	%

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Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Schedule of quarterly results of operations

2015	1Q		2Q		3Q3			4Q		Year
Total revenue	$	2,080.8	$	2,277.8	$	2,334.1		$	2,563.3	$	9,256.0
Gross profit1	1,951.2		2,153.3		2,202.7			2,433.8		8,741.0
Income tax provision	108.2		114.6		14.2			184.5		421.5
Net income (loss)	718.9		356.2		(34.1		)	561.0		1,602.0
Net income (loss) per share:2
Basic	$	0.90	$	0.45	$	(0.04	)	$	0.71	$	2.02
Diluted	$	0.86	$	0.43	$	(0.04	)	$	0.69	$	1.94
Weighted average shares:
Basic	798.9		793.0		791.1			785.8		792.2
Diluted	834.1		825.3		791.1			816.5		824.9

2014	1Q4		2Q		3Q		4Q		Year
Total revenue	$	1,730.0	$	1,872.7	$	1,982.2	$	2,085.5	$	7,670.4
Gross profit1	1,621.4		1,745.7		1,859.1		1,951.7		7,177.9
Income tax provision	52.6		109.0		69.0		96.9		327.5
Net income	279.7		597.8		508.5		613.9		1,999.9
Net income per share:2
Basic	$	0.34	$	0.75	$	0.64	$	0.77	$	2.49
Diluted	$	0.33	$	0.72	$	0.61	$	0.74	$	2.39
Weighted average shares:
Basic	811.5		799.6		799.6		800.2		802.7
Diluted	845.1		831.0		832.8		834.6		836.0

¹  Gross profit is computed by subtracting cost of goods sold (excluding amortization of acquired intangible assets) from net product sales.

²  The sum of the quarters may not equal the full year due to rounding. In addition, quarterly and full year basic and diluted earnings per share are calculated separately.

³  Net income for 2015 was a loss in the third quarter primarily due to costs related to collaborations and the acquisition of Receptos.

⁴  Net income for 2014 was lower in the first quarter compared to each of the other three quarters primarily due to a higher level of expense related to research and development collaborations.

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Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies (Details) $ in Millions	1 Months Ended
	Jun. 30, 2014	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) shares	Jun. 18, 2014 shares
Concentration of Credit Risk:
Stock split (ratio)	2
Common stock, shares authorized | shares		1,150,000,000.000	1,150,000,000	1,150,000,000.000
Net receivables | Spain, Italy and Portugal
Concentration of Credit Risk:
Accounts receivable, net | $		$ 187.8	$ 241.8
Accounts receivable, net, noncurrent | $		$ 31.3
Previously Reported
Concentration of Credit Risk:
Common stock, shares authorized | shares				575,000,000.0

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Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Currency Translation:
Net foreign exchange gain (loss)	$ (11.7)	$ (9.5)	$ 22.2
Revenue Recognition
Percentage of responsibility for patient's cost of branded prescription taken by manufacturers	50.00%
Minimum
Revenue Recognition
Period for settlement of rebates and fees	1 month
Maximum
Revenue Recognition
Period for settlement of rebates and fees	15 months
Buildings
Property, Plant and Equipment:
Estimated useful lives of capitalized assets (in years)	40 years
Building and operating equipment
Property, Plant and Equipment:
Estimated useful lives of capitalized assets (in years)	15 years
Manufacturing machinery and equipment
Property, Plant and Equipment:
Estimated useful lives of capitalized assets (in years)	10 years
Other machinery and equipment
Property, Plant and Equipment:
Estimated useful lives of capitalized assets (in years)	5 years
Furniture and fixtures
Property, Plant and Equipment:
Estimated useful lives of capitalized assets (in years)	5 years
Computer equipment and software | Minimum
Property, Plant and Equipment:
Estimated useful lives of capitalized assets (in years)	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment:
Estimated useful lives of capitalized assets (in years)	7 years

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Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies (Details 3) $ in Millions	Dec. 31, 2015 USD ($)
Accounting Policies [Abstract]
Publicly traded equity investments held by company	$ 1,236

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Acquisitions - Receptos (Details) - USD ($) $ / shares in Units, $ in Millions		4 Months Ended	12 Months Ended
	Aug. 27, 2015	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill		$ 4,879.0	$ 4,879.0	$ 2,191.2
Business Combination, Separately Recognized Transactions
Acquisition related charges			299.6	48.7	$ 171.1
Receptos
Business Combination, Consideration Transferred
Total consideration	$ 7,626.2
Cash paid for outstanding common stock	7,311.3
Cash for equity compensation attributable to pre-combination service	314.9
Cash for the portion of equity compensation attributable to the post-combination service period	197.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Working capital	479.2
Property, plant and equipment	5.0
In-process research and development product rights	6,842.0
Current deferred tax assets	241.3
Other non-current assets	7.9
Non-current deferred tax liabilities(2)	(2,519.2)
Total identifiable net assets	5,056.2
Goodwill	2,570.0
Total net assets acquired	$ 7,626.2
Business Combination, Separately Recognized Transactions
Expense associated with the acquisition and operations of Receptos included in Celgene's Consolidated Statements of Operation		380.5
Acquisition related charges		19.9
Business Acquisition, Pro Forma Information
Total revenue			9,256.0	7,676.3
Net income			$ 1,630.8	$ 1,499.9
Net income per common share: basic (dollars per share)			$ 2.06	$ 1.87
Net income per common share: diluted (dollars per share)			$ 1.98	$ 1.79
Receptos | Research and development
Business Combination, Separately Recognized Transactions
Expense associated with the acquisition and operations of Receptos included in Celgene's Consolidated Statements of Operation		78.6
Receptos | Selling, general and administrative
Business Combination, Separately Recognized Transactions
Expense associated with the acquisition and operations of Receptos included in Celgene's Consolidated Statements of Operation		5.1
Receptos | Acquisition related (gains) charges and restructuring, net
Business Combination, Separately Recognized Transactions
Expense associated with the acquisition and operations of Receptos included in Celgene's Consolidated Statements of Operation		$ 296.8

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Acquisitions - Quanticel (Details) - USD ($) $ in Millions		2 Months Ended
	Oct. 19, 2015	Dec. 31, 2015	Oct. 18, 2015	Dec. 31, 2014
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill		$ 4,879.0		$ 2,191.2
Current Liabilities
Business Acquisition [Line Items]
Contingent consideration	$ 82.3
Noncurrent Liabilities
Business Acquisition [Line Items]
Contingent consideration	83.7
Other Income (Expense)
Business Acquisition [Line Items]
Gain recognized based on faiv market value of interest derived from purchase price		$ 10.3
Quanticel
Business Acquisition [Line Items]
Cash	95.9
Contingent consideration	166.0
Cash	95.9
Fair value of pre-existing equity ownership	11.4
Total fair value of consideration	273.3
Ownership percentage prior to acquisition			5.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Working capital	7.0
Property, plant and equipment	1.9
Other non-current assets	0.8
Intangible asset	232.0
Debt obligations	(13.9)
Non-current deferred tax liabilities	(72.3)
Total identifiable net assets	155.5
Goodwill	117.8
Total net assets acquired	273.3
Quanticel | Discovery and Development Targets
Business Acquisition [Line Items]
Contingent consideration	$ 385.0

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Acquisitions - Nogra Pharma Limited Acquisition (Details) - USD ($) $ in Millions		12 Months Ended
	May. 14, 2014	Dec. 31, 2015	Oct. 19, 2015	Dec. 31, 2014
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill		$ 4,879.0		$ 2,191.2
Current Liabilities
Business Combination, Consideration Transferred
Contingent consideration			$ 82.3
Noncurrent Liabilities
Business Combination, Consideration Transferred
Contingent consideration			$ 83.7
Nogra Pharma Limited
Business Acquisition [Line Items]
Estimated maximum potential payments related to contingent consideration	$ 815.0	$ 1,865.0
Potential milestones payment, annual sales achievement	500.0
Potential milestone payments	1,050.0
Business Combination, Consideration Transferred
Cash	710.0
Contingent consideration	1,060.0
Total fair value of consideration	1,770.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
In-process research and development product rights	1,620.0
Current deferred tax assets	1.3
Non-current deferred tax liabilities(2)	(1.3)
Total identifiable net assets	1,620.0
Goodwill	150.0
Total net assets acquired	1,770.0
Collaboration agreement, termination of agreement, period		180 days
Nogra Pharma Limited | Maximum
Business Acquisition [Line Items]
Potential milestones payment, annual sales achievement	$ 4,000.0
Nogra Pharma Limited | Current Liabilities
Business Combination, Consideration Transferred
Contingent consideration		$ 5.0
Nogra Pharma Limited | Noncurrent Liabilities
Business Combination, Consideration Transferred
Contingent consideration		$ 1,055.0

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Earnings Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income	$ 561,000,000	$ (34,100,000)	$ 356,200,000	$ 718,900,000	$ 613,900,000	$ 508,500,000	$ 597,800,000	$ 279,700,000	$ 1,602,000,000	$ 1,999,900,000	$ 1,449,900,000
Weighted average shares:
Basic (in shares)	785,800,000	791,100,000	793,000,000	798,900,000	800,200,000	799,600,000	799,600,000	811,500,000	792,200,000	802,700,000	827,700,000
Effect of dilutive securities:
Options, restricted stock units, warrants and other (in shares)									32,700,000	33,300,000	32,900,000
Diluted (in shares)	816,500,000	791,100,000	825,300,000	834,100,000	834,600,000	832,800,000	831,000,000	845,100,000	824,900,000	836,000,000	860,600,000
Net income per share attributable to Celgene:
Basic (in dollars per share)	$ 0.71	$ (0.04)	$ 0.45	$ 0.90	$ 0.77	$ 0.64	$ 0.75	$ 0.34	$ 2.02	$ 2.49	$ 1.75
Diluted (in dollars per share)	$ 0.69	$ (0.04)	$ 0.43	$ 0.86	$ 0.74	$ 0.61	$ 0.72	$ 0.33	$ 1.94	$ 2.39	$ 1.68
Anti-dilutive securities
Antidilutive securities excluded from computation of earnings per share (in shares)									14,100,000	18,700,000	14,300,000
Approved common share repurchase amount	$ 17,500,000,000.0		$ 4,000,000,000.000						$ 17,500,000,000.0
Put option premium net gains (losses)									$ (9,900,000)	$ 11,600,000
Put options outstanding	0								0
Common stock repurchased under the program during the period (in shares)									28,100,000.0
Common stock repurchased under the program during the period									$ 3,257,000,000
Remaining open-ended repurchase authorization	$ 3,890,000,000								$ 3,890,000,000

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Financial Instruments and Fair Value Measurement (Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	May. 14, 2014
Recurring basis | Quoted Price in Active Markets for Identical Assets (Level 1)
Assets:
Available-for-sale securities	$ 1,235.9	$ 1,051.3
Total assets	1,235.9	1,051.3
Liabilities:
Contingent value rights	(51.9)	(136.3)
Total liabilities	(51.9)	(136.3)
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale securities	435.7	2,373.8
Forward currency contracts	606.0	550.7
Purchased currency options	46.7	9.8
Interest rate swaps	52.5	20.0
Total assets	1,140.9	2,954.3
Liabilities:
Written currency options	(19.1)	(4.6)
Total liabilities	(19.1)	(4.6)
Recurring basis | Significant Unobservable Inputs (Level 3)
Liabilities:
Other acquisition related contingent consideration	(1,521.5)	(1,279.0)
Total liabilities	(1,521.5)	(1,279.0)
Recurring basis | Fair Value
Assets:
Available-for-sale securities	1,671.6	3,425.1
Forward currency contracts	606.0	550.7
Purchased currency options	46.7	9.8
Interest rate swaps	52.5	20.0
Total assets	2,376.8	4,005.6
Liabilities:
Contingent value rights	(51.9)	(136.3)
Written currency options	(19.1)	(4.6)
Other acquisition related contingent consideration	(1,521.5)	(1,279.0)
Total liabilities	(1,592.5)	$ (1,419.9)
Gloucester Pharmaceuticals, Inc.
Fair Value of assets and liabilities
Estimated maximum potential payments related to contingent consideration	120.0
Avila Therapeutics, Inc.
Fair Value of assets and liabilities
Estimated maximum potential payments related to contingent consideration	555.0
Quanticel
Fair Value of assets and liabilities
Estimated maximum potential payments related to contingent consideration	385.0
Nogra Pharma Limited
Fair Value of assets and liabilities
Estimated maximum potential payments related to contingent consideration	$ 1,865.0		$ 815.0

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Financial Instruments and Fair Value Measurement (Level 3 Liabilities) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Liabilities:
Balance at beginning of period		$ (1,279.0)	$ (228.5)
Amounts acquired or issued		(166.0)	(1,060.0)
Net change in fair value		(76.5)	(30.5)
Settlements		0.0	40.0
Transfers in and/or out of Level 3		0.0	0.0
Balance at end of period		(1,521.5)	$ (1,279.0)
Change in Level 3 liabilities		242.5
Quanticel
Liabilities:
Amounts acquired or issued	$ (166.0)
Avila Therapeutics, Inc.
Liabilities:
Change in Level 3 liabilities		$ 76.5

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Derivative Instruments and Hedging Activities (Foreign Currency Forward Contracts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional amount	$ 9,275.0
Foreign currency forward contracts
Derivative [Line Items]
Period to settlement dates of derivatives is within this period	3 years
Designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Period to settlement dates of derivatives is within this period	36 months	36 months
Notional amount	$ 3,915.0	$ 4,284.1
Not designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Notional amount	920.0	835.5
Australian Dollar | Designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Notional amount	45.1	18.8
British Pound | Designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Notional amount	289.3	304.8
Canadian Dollar | Designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Notional amount	135.9	43.7
Euro | Designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Notional amount	2,934.3	3,375.7
Japanese Yen | Designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Notional amount	$ 510.4	$ 541.1

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Derivative Instruments and Hedging Activities (Foreign Currency Option Contracts) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional amount	$ 9,275.0
Designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	3,915.0	$ 4,284.1
Purchased Put | Designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	641.5	152.6
Written Call | Designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	$ 690.0	$ 160.9

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Derivative Instruments and Hedging Activities (Forward Starting Interest Rate Swaps) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Aug. 31, 2015
Derivative [Line Items]
Notional amount	$ 9,275.0
Accumulated OCI, loss position	$ 21.6
Forward Currency and Treasury Locks
Derivative [Line Items]
Notional amount		$ 2,900.0
Forward starting interest rate swaps
Derivative [Line Items]
Maturity period (in years)	10 years

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Derivative Instruments and Hedging Activities (Interest Rate Swap Contracts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Aug. 31, 2015
Derivative [Line Items]
Notional amount	$ 9,275.0
Interest rate swaps
Derivative [Line Items]
Notional amount	3,550.0	$ 2,700.0
Interest rate swaps | Designated as hedging instruments
Derivative [Line Items]
Proceeds from settlement of interest rate swap contracts	$ 10.8	25.5
2.450% senior notes due 2015
Derivative [Line Items]
Interest rate (as a percent)	2.45%
3.875% senior notes due 2025
Derivative [Line Items]
Interest rate (as a percent)			3.875%
Senior Notes | 2.450% senior notes due 2015 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 0.0	$ 300.0
Interest rate (as a percent)	2.45%
Senior Notes | 1.900% senior notes due 2017
Derivative [Line Items]
Interest rate (as a percent)	1.90%	1.90%
Senior Notes | 1.900% senior notes due 2017 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 300.0	$ 300.0
Interest rate (as a percent)	1.90%
Senior Notes | 2.300% senior notes due 2018
Derivative [Line Items]
Interest rate (as a percent)	2.30%	2.30%
Senior Notes | 2.300% senior notes due 2018 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 200.0	$ 200.0
Interest rate (as a percent)	2.30%
Senior Notes | 2.250% senior notes due 2019
Derivative [Line Items]
Interest rate (as a percent)	2.25%	2.25%
Senior Notes | 2.250% senior notes due 2019 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 500.0	$ 500.0
Interest rate (as a percent)	2.25%
Senior Notes | 3.950% senior notes due 2020
Derivative [Line Items]
Interest rate (as a percent)	3.95%	3.95%
Senior Notes | 3.950% senior notes due 2020 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 500.0	$ 500.0
Interest rate (as a percent)	3.95%
Senior Notes | 3.250% senior notes due 2022
Derivative [Line Items]
Interest rate (as a percent)	3.25%
Senior Notes | 3.250% senior notes due 2022 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 1,000.0	$ 750.0
Interest rate (as a percent)	3.25%
Senior Notes | 4.000% senior notes due 2023
Derivative [Line Items]
Interest rate (as a percent)	4.00%	4.00%
Senior Notes | 4.000% senior notes due 2023 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 700.0	$ 150.0
Interest rate (as a percent)	4.00%
Senior Notes | 3.625% senior notes due 2024
Derivative [Line Items]
Interest rate (as a percent)	3.625%	3.625%
Senior Notes | 3.625% senior notes due 2024 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 100.0	$ 0.0
Interest rate (as a percent)	3.625%
Senior Notes | 3.875% senior notes due 2025
Derivative [Line Items]
Interest rate (as a percent)	3.875%
Senior Notes | 3.875% senior notes due 2025 | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 250.0	$ 0.0
Interest rate (as a percent)	3.875%

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Derivative Instruments and Hedging Activities (Fair Value and Presentation in the Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Fair value of derivative instruments
Asset Derivatives	$ 754.7	$ 651.2
Liability Derivatives	68.6	75.3
Designated as hedging instruments | Foreign exchange contracts | Other current assets
Fair value of derivative instruments
Asset Derivatives	356.2	264.9
Liability Derivatives	18.0	44.9
Designated as hedging instruments | Foreign exchange contracts | Other non-current assets
Fair value of derivative instruments
Asset Derivatives	287.8	322.3
Liability Derivatives	28.0	17.5
Designated as hedging instruments | Foreign exchange contracts | Other current liabilities
Fair value of derivative instruments
Asset Derivatives		0.1
Liability Derivatives		1.7
Designated as hedging instruments | Interest rate swaps | Other current assets
Fair value of derivative instruments
Asset Derivatives	30.7	17.9
Liability Derivatives	0.0	0.0
Designated as hedging instruments | Interest rate swaps | Other non-current assets
Fair value of derivative instruments
Asset Derivatives	26.1	4.8
Liability Derivatives	4.7	0.3
Designated as hedging instruments | Interest rate swaps | Other non-current liabilities
Fair value of derivative instruments
Asset Derivatives	0.2	0.0
Liability Derivatives	0.9	3.8
Not designated as hedging instruments | Foreign exchange contracts | Other current assets
Fair value of derivative instruments
Asset Derivatives	46.0	39.7
Liability Derivatives	5.9	6.0
Not designated as hedging instruments | Foreign exchange contracts | Other current liabilities
Fair value of derivative instruments
Asset Derivatives	2.9	0.1
Liability Derivatives	7.4	1.1
Not designated as hedging instruments | Interest rate swaps | Other current assets
Fair value of derivative instruments
Asset Derivatives	2.4	0.1
Liability Derivatives	2.3	0.0
Not designated as hedging instruments | Interest rate swaps | Other non-current assets
Fair value of derivative instruments
Asset Derivatives	2.4	1.3
Liability Derivatives	$ 1.4	$ 0.0

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Derivative Instruments and Hedging Activities (Schedule of Impacts on Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Derivative instruments gain loss
Gains (losses) expected to be reclassified from accumulated OCI into operations in the next 12 months	$ 364.8
Gains (losses) related to amounts excluded from assessment of hedge effectiveness		$ 5.8
Gains (losses) related to ineffective portion of hedging relationships		(18.0)
Designated as hedging instruments | Cash flow hedges | Foreign exchange contracts
Derivative instruments gain loss
Amount of gain/(loss) recognized in OCI on derivative	429.4	600.4
Designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Net product sales
Derivative instruments gain loss
Amount of gain/(loss) reclassified from accumulated OCI into income	354.4	27.5
Designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Other income, net
Derivative instruments gain loss
Amount of gain/(loss) recognized in income on derivative	20.0	(12.2)
Gains (losses) related to amounts excluded from assessment of hedge effectiveness	23.0
Derivative, net hedge ineffectiveness gain (loss)	(3.0)
Designated as hedging instruments | Cash flow hedges | Treasury rate lock agreements
Derivative instruments gain loss
Amount of gain/(loss) recognized in OCI on derivative	(27.9)	0.0
Designated as hedging instruments | Cash flow hedges | Treasury rate lock agreements | Other income, net
Derivative instruments gain loss
Amount of gain/(loss) recognized in income on derivative	(0.2)
Designated as hedging instruments | Cash flow hedges | Treasury rate lock agreements | Interest expense
Derivative instruments gain loss
Amount of gain/(loss) reclassified from accumulated OCI into income	(4.2)	(3.5)
Designated as hedging instruments | Cash flow hedges | Forward starting interest rate swaps
Derivative instruments gain loss
Amount of gain/(loss) recognized in OCI on derivative	9.0	(32.3)
Designated as hedging instruments | Cash flow hedges | Forward starting interest rate swaps | Other income, net
Derivative instruments gain loss
Amount of gain/(loss) recognized in income on derivative	0.3	(3.6)
Designated as hedging instruments | Cash flow hedges | Forward starting interest rate swaps | Interest expense
Derivative instruments gain loss
Amount of gain/(loss) reclassified from accumulated OCI into income	(1.5)	(0.9)
Designated as hedging instruments | Fair value hedges | Interest rate swaps | Interest expense
Derivative instruments gain loss
Amount of gain/(loss) recognized in income on derivative	60.3	43.0
Not designated as hedging instruments | Foreign exchange contracts | Other income, net
Derivative instruments not designated as hedging instruments
Amount of gain/(loss) recognized in income on derivative	81.2	79.3
Not designated as hedging instruments | Put options sold | Other income, net
Derivative instruments not designated as hedging instruments
Amount of gain/(loss) recognized in income on derivative	$ (9.9)	$ 11.6

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Cash, Cash Equivalents and Marketable Securities Available-for-Sale (Amortized Cost, Gross Unrealized Gain/Loss, and Estimated Fair Value) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Cash and cash equivalents
Money market funds	$ 1,413.0	$ 2,251.0
Available-for-sale securities by major security type and class of security
Amortized Cost	1,249.6	2,712.1
Gross Unrealized Gain	468.2	718.3
Gross Unrealized Loss	(46.2)	(5.3)
Estimated Fair Value	1,671.6	3,425.1
U.S. Treasury securities
Available-for-sale securities by major security type and class of security
Amortized Cost	153.0	1,044.7
Gross Unrealized Gain	0.0	0.3
Gross Unrealized Loss	(0.4)	(0.8)
Estimated Fair Value	152.6	1,044.2
U.S. government-sponsored agency securities
Available-for-sale securities by major security type and class of security
Amortized Cost		145.1
Gross Unrealized Gain		0.1
Gross Unrealized Loss		(0.1)
Estimated Fair Value		145.1
U.S. government-sponsored agency MBS
Available-for-sale securities by major security type and class of security
Amortized Cost	29.8	531.1
Gross Unrealized Gain	0.1	1.0
Gross Unrealized Loss	(0.4)	(2.7)
Estimated Fair Value	29.5	529.4
Non-U.S. government, agency and supranational securities
Available-for-sale securities by major security type and class of security
Amortized Cost		32.4
Gross Unrealized Gain		0.0
Gross Unrealized Loss		(0.1)
Estimated Fair Value		32.3
Corporate debt – global
Available-for-sale securities by major security type and class of security
Amortized Cost	219.7	446.3
Gross Unrealized Gain	0.0	0.6
Gross Unrealized Loss	(1.6)	(1.2)
Estimated Fair Value	218.1	445.7
Asset backed securities
Available-for-sale securities by major security type and class of security
Amortized Cost	35.6	177.3
Gross Unrealized Gain	0.0	0.0
Gross Unrealized Loss	(0.1)	(0.2)
Estimated Fair Value	35.5	177.1
Marketable equity securities
Available-for-sale securities by major security type and class of security
Amortized Cost	811.5	335.2
Gross Unrealized Gain	468.1	716.3
Gross Unrealized Loss	(43.7)	(0.2)
Estimated Fair Value	$ 1,235.9	$ 1,051.3

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Cash, Cash Equivalents and Marketable Securities Available-for-Sale (Continuous Unrealized Loss Positions) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Estimated Fair Value
Less than 12 months	$ 873.9
12 months or longer	12.7
Total	886.6
Gross Unrealized Loss
Less than 12 months	(46.1)
12 months or longer	(0.1)
Total	(46.2)
U.S. Treasury securities
Estimated Fair Value
Less than 12 months	143.6
12 months or longer	0.0
Total	143.6
Gross Unrealized Loss
Less than 12 months	(0.4)
12 months or longer	0.0
Total	(0.4)
U.S. government-sponsored agency MBS
Estimated Fair Value
Less than 12 months	12.8
12 months or longer	6.8
Total	19.6
Gross Unrealized Loss
Less than 12 months	(0.3)
12 months or longer	(0.1)
Total	(0.4)
Corporate debt – global
Estimated Fair Value
Less than 12 months	193.5
12 months or longer	0.0
Total	193.5
Gross Unrealized Loss
Less than 12 months	(1.6)
12 months or longer	0.0
Total	(1.6)
Asset backed securities
Estimated Fair Value
Less than 12 months	29.6
12 months or longer	5.9
Total	35.5
Gross Unrealized Loss
Less than 12 months	(0.1)
12 months or longer	0.0
Total	(0.1)
Marketable equity securities
Estimated Fair Value
Less than 12 months	494.4
12 months or longer	0.0
Total	494.4
Gross Unrealized Loss
Less than 12 months	(43.7)
12 months or longer	0.0
Total	$ (43.7)

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Cash, Cash Equivalents and Marketable Securities Available-for-Sale (Debt Securities, Amortized Cost and Fair Value) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Amortized Cost
Duration of one year or less	$ 58.4
Duration of one through three years	363.7
Duration of three through five years	15.9
Total	438.0
Fair Value
Duration of one year or less	58.3
Duration of one through three years	361.8
Duration of three through five years	15.6
Total	$ 435.7

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Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 201.3	$ 200.0
Work in process	120.0	101.5
Finished goods	122.1	91.6
Total	$ 443.4	$ 393.1

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Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment:
Subtotal	$ 1,445.6	$ 1,166.1
Less accumulated depreciation and amortization	631.5	523.5
Total	814.1	642.6
Land
Property, Plant and Equipment:
Subtotal	75.4	37.9
Buildings
Property, Plant and Equipment:
Subtotal	274.1	260.8
Building and operating equipment
Property, Plant and Equipment:
Subtotal	33.1	32.0
Leasehold improvements
Property, Plant and Equipment:
Subtotal	152.3	135.5
Machinery and equipment
Property, Plant and Equipment:
Subtotal	246.6	213.5
Furniture and fixtures
Property, Plant and Equipment:
Subtotal	53.2	48.8
Computer equipment and software
Property, Plant and Equipment:
Subtotal	389.6	332.8
Construction in progress
Property, Plant and Equipment:
Subtotal	$ 221.3	$ 104.8

XML

Other Financial Information (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Accrued expenses
Compensation	$ 297.8	$ 285.2
Rebates, distributor chargebacks and distributor services	365.5	232.9
Clinical trial costs and grants	255.1	189.5
Interest	170.3	59.1
Royalties, license fees and collaboration agreements	75.9	26.7
Commercial related activities	38.7	56.2
Sales returns	18.8	10.2
Rent	18.1	14.0
Professional services	14.9	7.9
Other taxes	7.9	9.3
Other	113.7	100.1
Total	1,376.7	991.1
Other current liabilities
Deferred tax liability	0.0	131.2
Compensation	55.6	32.6
Sales, use and value added tax	61.1	56.8
Derivative contracts	4.5	2.6
Collaboration agreement upfront payable	40.3	14.0
Other	0.1	4.1
Total	271.0	275.8
Other non-current liabilities
Deferred compensation and long-term incentives	170.5	150.5
Deferred tax liability	377.7	555.6
Other	29.5	49.8
Total	2,041.7	2,136.7
Quanticel
Other current liabilities
Contingent consideration	82.5	0.0
Other non-current liabilities
Contingent consideration	84.2	0.0
Nogra Pharma Limited
Other current liabilities
Contingent consideration	24.9	24.7
Other non-current liabilities
Contingent consideration	1,214.5	1,110.8
Avila Therapeutics, Inc.
Other current liabilities
Contingent consideration	2.0	9.8
Other non-current liabilities
Contingent consideration	94.5	114.2
Gloucester Pharmaceuticals, Inc.
Other non-current liabilities
Contingent consideration	18.9	19.5
Abraxis Bio Science, Inc.
Other non-current liabilities
Contingent consideration	$ 51.9	$ 136.3

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Intangible Assets and Goodwill (Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets By Category
Amortization period related to non-IPR&D intangible assets, minimum (in years)	9 years 8 months
Gross Carrying Value	$ 4,082.3	$ 3,849.1
Accumulated Amortization	(1,694.8)	(1,410.2)
Intangible Assets, Net	2,387.5	2,438.9
Total intangible assets
Gross Carrying Value	12,552.9	5,477.8
Accumulated Amortization	(1,694.8)	(1,410.2)
Intangible Assets, Net	10,858.1	4,067.6
Increase in the gross carrying value of the intangible assets	7,075.0
Amortization	284.7	263.9	$ 270.1
Increase in amortization expense	20.8
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Estimated amortization expense, 2016	373.1
Estimated amortization expense, 2017	372.4
Estimated amortization expense, 2018	299.1
Estimated amortization expense, 2019	162.9
Estimated amortization expense, 2020	153.8
Acquired developed product rights
Intangible Assets By Category
Gross Carrying Value	3,405.9	3,405.9
Accumulated Amortization	(1,448.3)	(1,234.1)
Intangible Assets, Net	1,957.6	2,171.8
Total intangible assets
Accumulated Amortization	(1,448.3)	(1,234.1)
Technology
Intangible Assets By Category
Gross Carrying Value	565.7	333.7
Accumulated Amortization	(197.1)	(135.1)
Intangible Assets, Net	368.6	198.6
Total intangible assets
Accumulated Amortization	(197.1)	(135.1)
Licenses
Intangible Assets By Category
Gross Carrying Value	66.7	67.0
Accumulated Amortization	(22.3)	(18.1)
Intangible Assets, Net	44.4	48.9
Total intangible assets
Accumulated Amortization	(22.3)	(18.1)
Other
Intangible Assets By Category
Gross Carrying Value	44.0	42.5
Accumulated Amortization	(27.1)	(22.9)
Intangible Assets, Net	16.9	19.6
Total intangible assets
Accumulated Amortization	(27.1)	(22.9)
Acquired IPR&D product rights
Non-amortized intangible assets:
Gross Carrying Value	8,470.6	$ 1,628.7
Nogra Pharma Limited | Acquired IPR&D product rights
Total intangible assets
Intangible assets acquired	6,842.0
Quanticel | Technology
Total intangible assets
Intangible assets acquired	$ 232.0

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Intangible Assets and Goodwill (Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Summary of changes in carrying value of goodwill
Beginning balance	$ 2,191.2
Ending balance	4,879.0
Receptos
Summary of changes in carrying value of goodwill
Acquisition	2,570.0
Quanticel
Summary of changes in carrying value of goodwill
Acquisition	$ 117.8

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Debt (Short-Term Borrowings and Current Portion of Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Short-term Debt [Line Items]
Commercial paper	$ 0.0	$ 99.6
2.450% senior notes due 2015	0.0	506.3
Total	$ 0.0	$ 605.9
2.450% senior notes due 2015
Short-term Debt [Line Items]
Interest rate (as a percent)	2.45%	2.45%

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Debt (Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Aug. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt, net of discount	$ 14,250.4		$ 6,265.7
2.125% senior notes due 2018
Debt Instrument [Line Items]
Interest rate (as a percent)		2.125%
2.875% senior notes due 2020
Debt Instrument [Line Items]
Interest rate (as a percent)		2.875%
3.550% senior notes due 2022
Debt Instrument [Line Items]
Interest rate (as a percent)		3.55%
3.875% senior notes due 2025
Debt Instrument [Line Items]
Interest rate (as a percent)		3.875%
5.000% senior notes due 2045
Debt Instrument [Line Items]
Interest rate (as a percent)		5.00%
Senior Notes
Debt Instrument [Line Items]
Long-term debt, net of discount	$ 14,250.4		$ 6,265.7
Senior Notes | 1.900% senior notes due 2017
Debt Instrument [Line Items]
Interest rate (as a percent)	1.90%		1.90%
Long-term debt, net of discount	$ 501.2		$ 501.0
Senior Notes | 2.125% senior notes due 2018
Debt Instrument [Line Items]
Interest rate (as a percent)	2.125%
Long-term debt, net of discount	$ 999.9		$ 0.0
Senior Notes | 2.300% senior notes due 2018
Debt Instrument [Line Items]
Interest rate (as a percent)	2.30%		2.30%
Long-term debt, net of discount	$ 401.7		$ 401.2
Senior Notes | 2.250% senior notes due 2019
Debt Instrument [Line Items]
Interest rate (as a percent)	2.25%		2.25%
Long-term debt, net of discount	$ 505.1		$ 502.5
Senior Notes | 2.875% senior notes due 2020
Debt Instrument [Line Items]
Interest rate (as a percent)	2.875%
Long-term debt, net of discount	$ 1,497.5		$ 0.0
Senior Notes | 3.950% senior notes due 2020
Debt Instrument [Line Items]
Interest rate (as a percent)	3.95%		3.95%
Long-term debt, net of discount	$ 507.1		$ 502.8
Senior Notes | 3.250% senior notes due 2022
Debt Instrument [Line Items]
Interest rate (as a percent)	3.25%
Long-term debt, net of discount	$ 1,016.1		$ 1,010.2
Senior Notes | 3.550% senior notes due 2022
Debt Instrument [Line Items]
Interest rate (as a percent)	3.55%		3.55%
Long-term debt, net of discount	$ 997.4		$ 0.0
Senior Notes | 4.000% senior notes due 2023
Debt Instrument [Line Items]
Interest rate (as a percent)	4.00%		4.00%
Long-term debt, net of discount	$ 710.3		$ 708.5
Senior Notes | 3.625% senior notes due 2024
Debt Instrument [Line Items]
Interest rate (as a percent)	3.625%		3.625%
Long-term debt, net of discount	$ 1,001.7		$ 996.8
Senior Notes | 3.875% senior notes due 2025
Debt Instrument [Line Items]
Interest rate (as a percent)	3.875%
Long-term debt, net of discount	$ 2,475.6		$ 0.0
Senior Notes | 5.700% senior notes due 2040
Debt Instrument [Line Items]
Interest rate (as a percent)	5.70%		5.70%
Long-term debt, net of discount	$ 249.6		$ 249.5
Senior Notes | 5.250% senior notes due 2043
Debt Instrument [Line Items]
Interest rate (as a percent)	5.25%		5.25%
Long-term debt, net of discount	$ 396.7		$ 396.7
Senior Notes | 4.625% senior notes due 2044
Debt Instrument [Line Items]
Interest rate (as a percent)	4.625%		4.625%
Long-term debt, net of discount	$ 996.6		$ 996.5
Senior Notes | 5.000% senior notes due 2045
Debt Instrument [Line Items]
Interest rate (as a percent)	5.00%
Long-term debt, net of discount	$ 1,993.9		$ 0.0

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Debt (Narrative) (Details)	1 Months Ended	12 Months Ended
	Aug. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) Time_Per_Annum	Apr. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Long-term debt, fair value		$ 14,299,000,000
Debt instrument, face amount	$ 8,000,000,000.000
Debt issuance cost		50,000,000
Accumulated OCI, loss position		21,600,000
Commercial paper carrying value		0		$ 99,600,000
Commercial Paper, remaining borrowing capacity		1,750,000,000
Quanticel
Debt Instrument [Line Items]
Amount of debt paid off		13,900,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,750,000,000.000	$ 1,500,000,000.000
Maximum number of credit facility increases | Time_Per_Annum		1
Maximum borrowing capacity, subject to certain conditions		$ 2,000,000,000.000
Outstanding uncommitted facility		0		$ 0
Commercial Paper
Debt Instrument [Line Items]
Commercial paper debt outstanding		$ 0
2.125% senior notes due 2018
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,000,000,000.000
Interest rate (as a percent)	2.125%
Debt instrument, issuance price as percentage of par value	99.994%
Debt instrument, redemption price, percentage		1.20%
2.875% senior notes due 2020
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,500,000,000.000
Interest rate (as a percent)	2.875%
Debt instrument, issuance price as percentage of par value	99.819%
Debt instrument, redemption price, percentage		1.20%
3.550% senior notes due 2022
Debt Instrument [Line Items]
Debt instrument, face amount	$ 1,000,000,000.000
Interest rate (as a percent)	3.55%
Debt instrument, issuance price as percentage of par value	99.729%
Debt instrument, redemption price, percentage		1.25%
3.875% senior notes due 2025
Debt Instrument [Line Items]
Debt instrument, face amount	$ 2,500,000,000.000
Interest rate (as a percent)	3.875%
Debt instrument, issuance price as percentage of par value	99.034%
Debt instrument, redemption price, percentage		1.30%
5.000% senior notes due 2045
Debt Instrument [Line Items]
Debt instrument, face amount	$ 2,000,000,000.000
Interest rate (as a percent)	5.00%
Debt instrument, issuance price as percentage of par value	99.691%
Debt instrument, redemption price, percentage		1.35%
2015 Notes Redemption
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		101.00%
2.450% senior notes due 2015
Debt Instrument [Line Items]
Debt instrument, face amount		$ 500,000,000
Interest rate (as a percent)		2.45%
Senior Notes | 2.125% senior notes due 2018
Debt Instrument [Line Items]
Interest rate (as a percent)		2.125%
Senior Notes | 2.875% senior notes due 2020
Debt Instrument [Line Items]
Interest rate (as a percent)		2.875%
Senior Notes | 3.550% senior notes due 2022
Debt Instrument [Line Items]
Interest rate (as a percent)		3.55%		3.55%
Senior Notes | 3.875% senior notes due 2025
Debt Instrument [Line Items]
Interest rate (as a percent)		3.875%
Senior Notes | 5.000% senior notes due 2045
Debt Instrument [Line Items]
Interest rate (as a percent)		5.00%
Derivative
Debt Instrument [Line Items]
Accumulated OCI, loss position		$ 68,100,000
Gain as a Result of Past Swap Contract Settlements
Debt Instrument [Line Items]
Deferred (gain) loss on discontinuation of fair value hedge		(33,100,000)
Gain Related to Settlement of Swap Contracts During Current Fiscal Year
Debt Instrument [Line Items]
Deferred (gain) loss on discontinuation of fair value hedge		$ (6,000,000)

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Stockholders' Equity (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2015	Jun. 18, 2014
Stockholders' Equity Note [Abstract]
Preferred stock, shares authorized	5,000,000.0	5,000,000
Common stock, shares authorized	1,150,000,000.000	1,150,000,000			1,150,000,000.000
Common stock, shares issued	940,100,000.0	924,800,000
Aggregate value of common shares authorized to be purchased under share repurchase program	$ 17,500,000,000.0			$ 4,000,000,000.000
Amount of stock repurchased under share repurchase program	$ 3,251,000,000	$ 2,928,000,000	$ 2,769,000,000
Stock repurchase program, aggregate shares repurchased	146,900,000
Average price of shares repurchased under share repurchase program (in dollars per share)	$ 92.67
Cost of shares repurchased under share repurchase program	$ 13,610,000,000

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Stockholders' Equity (Summary of Common and Treasury Stock) (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in common stock issued and treasury stock
Balance at the beginning of the period (in shares)	924,800,000
Exercise of stock options and conversion of restricted stock units (in shares)	11,500,000
Balance at the end of the period (in shares)	940,100,000.0	924,800,000
Common Stock
Changes in common stock issued and treasury stock
Balance at the beginning of the period (in shares)	924,800,000	906,500,000	880,900,000
Exercise of stock options and conversion of restricted stock units (in shares)	15,300,000	18,300,000	25,000,000
Issuance of common stock for employee benefit plans (in shares)	0	0	600,000
Shares repurchased under share repurchase program (in shares)	0	0	0
Balance at the end of the period (in shares)	940,100,000	924,800,000	906,500,000
Treasury Stock
Changes in common stock issued and treasury stock
Balance at the beginning of the period (in shares)	(124,600,000)	(101,500,000)	(78,700,000)
Exercise of stock options and conversion of restricted stock units (in shares)	(1,200,000)	(1,300,000)	(500,000)
Issuance of common stock for employee benefit plans (in shares)	400,000	200,000	0
Shares repurchased under share repurchase program (in shares)	(28,100,000)	(22,000,000)	(22,300,000)
Balance at the end of the period (in shares)	(153,500,000)	(124,600,000)	(101,500,000)

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Accumulated Other Comprehensive Income (Summary of Components) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	$ 914.8	$ 94.0
Other comprehensive income (loss) before reclassifications	188.6	842.1
Amount reclassified from accumulated other comprehensive income	(335.7)	(21.3)
Total other comprehensive income (loss)	(147.1)	820.8	$ 143.7
Balance at the end of the period	767.7	914.8	94.0
Pension Liability
Summary of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	(15.5)	(6.9)
Other comprehensive income (loss) before reclassifications	1.6	(8.6)
Amount reclassified from accumulated other comprehensive income	0.0	0.0
Total other comprehensive income (loss)	1.6	(8.6)
Balance at the end of the period	(13.9)	(15.5)	(6.9)
Net Unrealized Gains (Losses) From Marketable Securities
Summary of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	460.9	137.3
Other comprehensive income (loss) before reclassifications	(204.6)	320.1
Amount reclassified from accumulated other comprehensive income	15.2	3.5
Total other comprehensive income (loss)	(189.4)	323.6
Balance at the end of the period	271.5	460.9	137.3
Net Unrealized Gains (Losses) From Hedges
Summary of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	519.6	(36.0)
Other comprehensive income (loss) before reclassifications	417.7	580.4
Amount reclassified from accumulated other comprehensive income	(350.9)	(24.8)
Total other comprehensive income (loss)	66.8	555.6
Balance at the end of the period	586.4	519.6	(36.0)
Foreign Currency Translation Adjustment
Summary of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	(50.2)	(0.4)
Other comprehensive income (loss) before reclassifications	(26.1)	(49.8)
Amount reclassified from accumulated other comprehensive income	0.0	0.0
Total other comprehensive income (loss)	(26.1)	(49.8)
Balance at the end of the period	$ (76.3)	$ (50.2)	$ (0.4)

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Accumulated Other Comprehensive Income (Reclassification Out AOCI) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest (expense)									$ (310.6)	$ (176.1)	$ (91.6)
Income tax benefit	$ (184.5)	$ (14.2)	$ (114.6)	$ (108.2)	$ (96.9)	$ (69.0)	$ (109.0)	$ (52.6)	(421.5)	(327.5)	(215.5)
Total reclassification, net of tax	$ 561.0	$ (34.1)	$ 356.2	$ 718.9	$ 613.9	$ 508.5	$ 597.8	$ 279.7	1,602.0	1,999.9	1,449.9
Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassification, net of tax									335.7	21.3	9.1
Reclassification out of accumulated other comprehensive income | Gains (losses) from cash-flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax benefit									2.2	1.7	6.9
Reclassification out of accumulated other comprehensive income | Gains (losses) from cash-flow hedges: | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net product sales									354.4	27.5	10.7
Reclassification out of accumulated other comprehensive income | Gains (losses) from cash-flow hedges: | Treasury rate lock agreements
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest (expense)									(4.2)	(3.5)	(3.4)
Reclassification out of accumulated other comprehensive income | Gains (losses) from cash-flow hedges: | Interest rate swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest (expense)									(1.5)	(0.9)	0.0
Reclassification out of accumulated other comprehensive income | Gains (losses) from available-for-sale marketable securities:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax benefit									8.2	1.9	2.2
Interest and investment income, net									$ (23.4)	$ (5.4)	$ (7.3)

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Share-Based Compensation (Discussion of Compensation Plans) (Details) - shares		12 Months Ended
	Jun. 17, 2015	Dec. 31, 2015
Share-Based Compensation
Number of common shares in the share reserve	247,800,000.0
Additional shares authorized, post-split shares of common stock	19,800,000.0
Shares of common stock available for future share-based grants under all plans		38,300,000.0
Options
Share-Based Compensation
Award vesting period, maximum (in years)		4 years
Award expiration period (in years)		10 years
Additional award vesting period, retirement provision, maximum		3 years
PSU
Share-Based Compensation
Performance measurement period for PSUs		3 years
Specified performance and market targets for revenue, weighting		37.50%
Specified performance and market targets for earnings per share, weighting		37.50%
Specified performance and market targets for relative total shareholder return, weighting		25.00%
Restricted trading period upon vesting for PSU's		1 year 1 day
PSU | Minimum
Share-Based Compensation
Performance based percentage target for PSUs granted		0.00%
PSU | Maximum
Share-Based Compensation
Performance based percentage target for PSUs granted		200.00%

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Share-Based Compensation (Components of Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock-Based Compensation
Total share-based compensation expense	$ 576.6	$ 447.6	$ 325.8
Tax benefit related to share-based compensation expense	161.2	129.3	94.5
Reduction in income	415.4	318.3	231.3
Non-qualified stock options
Stock-Based Compensation
Total share-based compensation expense	346.1	276.3	197.6
Cost of goods sold
Stock-Based Compensation
Total share-based compensation expense	31.7	26.2	18.5
Research and development
Stock-Based Compensation
Total share-based compensation expense	250.7	196.5	144.7
Selling, general and administrative
Stock-Based Compensation
Total share-based compensation expense	$ 294.2	$ 224.9	$ 162.6

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Share-Based Compensation (Assumptions) (Details) - Options - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-Based Compensation
Unrecognized compensation cost	$ 640.9
Weighted-average period over which unrecognized compensation cost is expected to be recognized	2 years
Weighted-average grant date fair value of the stock options issued (in dollars per share)	$ 38.83	$ 27.92	$ 20.22
Assumptions used in the estimation of fair value of options granted
Weighted average expected volatility	34.00%	33.00%	31.00%
Expected dividend yield	0.00%	0.00%	0.00%
Period of settlement of publicly traded options	6 months
Minimum
Assumptions used in the estimation of fair value of options granted
Risk-free interest rate	1.17%	1.51%	0.68%
Expected volatility	31.00%	28.00%	27.00%
Expected term (years)	5 years 7 days	5 years 7 days	5 years 10 days
Maximum
Assumptions used in the estimation of fair value of options granted
Risk-free interest rate	1.72%	1.90%	1.70%
Expected volatility	38.00%	37.00%	35.00%
Expected term (years)	5 years 15 days	5 years 22 days	5 years 6 months

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Share-Based Compensation (Plan Activities) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Options
Outstanding, beginning balnce (in shares)	77,200
Granted (in shares)	11,800
Exercised (in shares)	(11,500)
Forfeited (in shares)	(1,700)
Expired (in shares)	(100)
Outstanding, ending balance (in shares)	75,700	77,200
Vested or expected to vest in the future (in shares)	75,100
Vested (in shares)	41,200
Weighted Average Exercise Price Per Option
Outstanding, beginning balance (in dollars per share)	$ 49.47
Granted (in dollars per share)	118.65
Exercised (in dollars per share)	34.39
Forfeited (in dollars per share)	74.20
Expired (in dollars per share)	39.48
Outstanding, ending balance (in dollars per share)	61.99	$ 49.47
Vested or expected to vest in the future (in dollars per share)	61.64
Vested (in dollars per share)	$ 41.12
Weighted Average Remaining Contractual Term (Years)
Outstanding, weighted average remaining (in years)	6 years 7 months 6 days	6 years 10 months 24 days
Vested at December 31, 2015 or expected to vest in the future (in years)	6 years 7 months 6 days
Vested at December 31, 2015 (in years)	5 years 3 months 18 days
Aggregate Intrinsic Value (In Millions)
Outstanding	$ 4,411.8	$ 4,823.8
Vested or expected to vest in the future	4,400.1
Vested	$ 3,238.5
Nonvested RSUs
Share Equivalent
Nonvested, beginning balance (in shares)	9,400
Granted (in shares)	2,500
Exercised (in shares)	(3,800)
Forfeited (in shares)	(400)
Nonvested, ending balance (in shares)	7,700	9,400
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share)	$ 59.02
Granted (in dollars per share)	112.98
Vested (in dollars per share)	37.57
Forfeited (in dollars per share)	71.95
Nonvested, ending balance (in dollars per share)	$ 86.28	$ 59.02
Nonvested Performance-Based RSUs
Share Equivalent
Nonvested, beginning balance (in shares)	133
Granted (in shares)	211
Exercised (in shares)	0
Forfeited (in shares)	(10)
Nonvested, ending balance (in shares)	334	133
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in dollars per share)	$ 69.57
Granted (in dollars per share)	112.14
Vested (in dollars per share)	0.00
Forfeited (in dollars per share)	82.91
Nonvested, ending balance (in dollars per share)	$ 96.07	$ 69.57

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Share-Based Compensation (Additional Information) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Stock-based compensation
Net proceeds from share-based compensation arrangements	$ 251.7	$ 297.2	$ 551.6
Excess tax benefit from share-based compensation arrangements	300.5	250.6	169.4
Options
Stock-based compensation
Total fair value of shares vested	266.5	211.3	159.3
Total intrinsic value of stock options exercised during the period	$ 993.5	$ 946.6	$ 814.7
Ratio of stock options to RSU's in calculating the number of RSU's for employees	4
Unrecognized compensation cost	$ 640.9
Expected weighted-average period in years of compensation cost to be recognized	2 years
Nonvested RSUs
Stock-based compensation
Unrecognized compensation cost	$ 325.0
Expected weighted-average period in years of compensation cost to be recognized	1 year 4 months 24 days
Nonvested Performance-Based RSUs
Stock-based compensation
Unrecognized compensation cost	$ 17.9
Expected weighted-average period in years of compensation cost to be recognized	1 year 7 months 6 days

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Employee Benefit Plans (401K Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Defined contribution plan, employer contribution limit percentage of compensation	6.00%
Defined contribution plan, cost recognized	$ 35.1	$ 40.7	$ 32.6

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Employee Benefit Plans (Deferred Compensation Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation liability, non-current	$ 170.5	$ 150.5
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage of cash bonuses which the eligible participants can elect to defer	100.00%
Plan related expense	$ 0.3	0.3	$ 0.6
Deferred compensation liability, non-current	$ 104.5	$ 91.0
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits | Minimum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Employer match as a percentage of participant's base salary	10.00%
Deferred Compensation, Excluding Share-based Payments and Retirement Benefits | Maximum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage of base salary which the eligible participants can elect to defer	90.00%
Employer match as a percentage of participant's base salary	20.00%

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Employee Benefit Plans (Long-Term Incentive Plan) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) performance_cycle	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Long-Term Incentive Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Performance period	3 years
Number of separate three-year performance cycles | performance_cycle	3
Consecutive trading days	30 days
Estimated payout for the plan, current	$ 17.4
Plan related expense	$ 24.9	$ 42.3	$ 40.8
Long-Term Incentive Plan | Minimum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Payouts as percentage of the participant's salary	0.00%
Long-Term Incentive Plan | Maximum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Payouts as percentage of the participant's salary	200.00%
2016 Long-Term Incentive Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage of non-GAAP net income as component of performance measures of the plans	37.50%
Percentage of total non-GAAP revenue as component of performance measures of the plans	37.50%
Percentage of relative shareholder return as component of performance measures of the plans	25.00%
2016 Long-Term Incentive Plan | Maximum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Potential payout, assuming maximum objectives are achieved	$ 25.2
2017 Long-Term Incentive Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage of non-GAAP net income as component of performance measures of the plans	37.50%
Percentage of total non-GAAP revenue as component of performance measures of the plans	37.50%
Percentage of relative shareholder return as component of performance measures of the plans	25.00%
2017 Long-Term Incentive Plan | Maximum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Potential payout, assuming maximum objectives are achieved	$ 16.4
2018 Long-Term Incentive Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage of non-GAAP net income as component of performance measures of the plans	37.50%
Percentage of total non-GAAP revenue as component of performance measures of the plans	37.50%
Percentage of relative shareholder return as component of performance measures of the plans	25.00%
2018 Long-Term Incentive Plan | Maximum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Potential payout, assuming maximum objectives are achieved	$ 16.3

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Income Taxes (Income Before Tax Provision) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income before income taxes:
U.S.	$ 524.8	$ 565.0	$ 36.8
Non-U.S.	1,498.7	1,762.4	1,628.6
Income before income taxes	$ 2,023.5	$ 2,327.4	$ 1,665.4

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Income Taxes (Components of Tax Provision (Benefit)) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Taxes currently payable:
Federal									$ 320.7	$ 489.4	$ 352.6
State and local									63.1	56.3	45.4
Deferred income taxes									(28.7)	(273.8)	(245.1)
Total U.S. tax provision									355.1	271.9	152.9
International:
Taxes currently payable									71.1	54.1	64.1
Deferred income taxes									(4.7)	1.5	(1.5)
Total international tax provision									66.4	55.6	62.6
Total provision	$ 184.5	$ 14.2	$ 114.6	$ 108.2	$ 96.9	$ 69.0	$ 109.0	$ 52.6	421.5	327.5	$ 215.5
Undistributed earnings of foreign subsidiaries	9,667.0								9,667.0
Unremitted earnings of international subsidiaries	900.0								900.0
Deferred tax liability on foreign earnings	$ 316.5				$ 316.5				$ 316.5	$ 316.5

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Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets
NOL carryforwards	$ 56.2	$ 4.5
Deferred revenue	1.8	1.7
Capitalized research expenses	3.8	4.8
Tax credit carryforwards	10.7	5.0
Non-qualified stock options	340.9	250.5
Plant and equipment, primarily differences in depreciation	2.0	0.0
Inventory	11.3	14.5
Other assets	43.0	41.5
Intangible assets	661.3	654.7
Accrued and other expenses	233.2	191.6
Subtotal	1,364.2	1,168.8
Valuation allowance	(90.8)	(39.7)
Total deferred taxes	1,273.4	1,129.1
Liabilities
Plant and equipment, primarily differences in depreciation	0.0	(7.4)
Other assets	(3.7)	(4.0)
Intangible assets	(1,135.4)	(1,183.2)
Unremitted earnings	(316.5)	(316.5)
Unrealized (gains) losses on securities	(129.9)	(236.5)
Subtotal	(1,585.5)	(1,747.6)
Total deferred taxes	(312.1)	(618.5)
Deferred tax assets and liabilities classified on the company's balance sheet:
Current assets	0.0	11.7
Other assets (non-current)	65.6	56.6
Current liabilities	0.0	(131.2)
Other non-current liabilities	(377.7)	(555.6)
Total deferred taxes	$ (312.1)	$ (618.5)

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Income Taxes (Effective Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Percentages
U.S. statutory rate	35.00%	35.00%	35.00%
Foreign tax rate differences	(21.00%)	(22.30%)	(28.80%)
Unremitted earnings	0.00%	0.00%	0.00%
State taxes, net of federal benefit	1.20%	1.00%	0.60%
Change in valuation allowance	2.00%	0.20%	1.20%
Acquisition related differences	4.50%	(0.30%)	3.70%
Changes in uncertain tax positions	(0.50%)	(0.40%)	0.80%
Other	(0.40%)	0.90%	0.40%
Effective income tax rate	20.80%	14.10%	12.90%
Swiss Federal Tax Administration FTA
Operating Loss Carryforwards [Line Items]
Maximum statutory Swiss income tax rate (as a percent)	17.00%	18.40%	19.70%
Reduction in effective tax rates due to difference between maximum statutory Swiss income tax rate and the company's Swiss income tax rate under the tax holiday (as a percent)	25.70%	18.00%	25.10%

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Income Taxes (NOL and Tax Credit Carryforwards) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Deferred income taxes	$ (28.7)	$ (273.8)	$ (245.1)
State
Operating Loss Carryforwards [Line Items]
NOL carryforwards	114.2
NOL carryforwards for which deferred tax assets have not been recorded	476.4
Research
Operating Loss Carryforwards [Line Items]
Credit carryforwards	16.8
Credit carryforwards for which deferred tax assets have not been recorded	4.0
State NOL Expiring 2016 through 2035 | State
Operating Loss Carryforwards [Line Items]
NOL carryforwards	$ 883.5

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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Unrecognized tax benefits:
Balance at beginning of year	$ 251.8	$ 219.2
Increases related to prior year tax positions	0.0	2.8
Decreases related to prior year tax positions	0.0	0.0
Increases related to current year tax positions	84.8	44.4
Settlements	0.0	(10.0)
Lapse of statute	(10.8)	(4.6)
Balance at end of year	325.8	251.8
Unrecognized tax benefits that, if recognized, would have a net impact on the effective tax rate	300.8
Accrued interest related to uncertain tax positions	$ 32.6	$ 28.1

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Income Taxes (Stock Option Deductions Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Aug. 27, 2015
Business Acquisition [Line Items]
Increase in additional paid-in capital on realization of stock option deduction benefits for income tax purposes	$ 302.1	$ 252.6	$ 170.0
Deferred income taxes recorded as a component of accumulated other comprehensive income resulting in a deferred income tax asset	129.9	236.5
Deferred tax liability related to acquisition	$ 312.1	$ 618.5
Receptos
Business Acquisition [Line Items]
Deferred tax liability related to acquisition				$ 2,519.0

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Collaboration Agreements (Details) shares in Millions			1 Months Ended											12 Months Ended
	Mar. 21, 2014 USD ($) Collaborative_Arrangement	Dec. 02, 2013 product_candidate	Feb. 29, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jul. 31, 2015 USD ($)	Jun. 30, 2015 USD ($) shares	Apr. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($) Amino_Acid_Target research_targets	Jan. 31, 2014 USD ($) data_package product_candidate	Apr. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2015 USD ($) discovery_stage_program	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Selling, general and administrative														$ 2,305,400,000	$ 2,027,900,000	$ 1,684,500,000
Celgene
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Allocation of cost, as a percentage							70.00%
Acceleron Pharma Inc
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees														0	0	0	$ 70,000,000
Milestone payments made														$ 0	$ 0	17,000,000	27,500,000
Percentage of equity investment ownership				14.00%					14.00%					14.00%	14.00%
Additional equity investments made														$ 0	$ 52,400,000	10,000,000	30,500,000
Equity investment				$ 224,900,000					$ 179,700,000					224,900,000	179,700,000
Acceleron Pharma Inc | ACE-011 program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront and milestone payments received														367,000,000
Acceleron Pharma Inc | ACE-011 - discovery stage programs
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront and milestone payments received														$ 348,000,000
Number of programs | discovery_stage_program														3
Acceleron Pharma Inc | ACE-536 program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront and milestone payments received														$ 217,500,000
Acceleron Pharma Inc | ACE-536 first discovery stage program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront and milestone payments received														170,800,000
Acceleron Pharma Inc | ACE-536 second discovery stage program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront and milestone payments received														148,800,000
Acceleron Pharma Inc | ACE-536 each additional discovery stage program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront and milestone payments received														125,400,000
Agios Pharmaceuticals, Inc.
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments									$ 20,000,000					120,000,000
Upfront fees														9,000,000	0	0	121,200,000
Milestone payments made														$ 0	$ 0	0	0
Percentage of equity investment ownership				13.00%					14.00%					13.00%	14.00%
Additional equity investments made														$ 0	$ 38,300,000	12,800,000	37,500,000
Equity investment				$ 340,400,000					$ 587,400,000					340,400,000	587,400,000
Agios Pharmaceuticals, Inc. | AG-881
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees								$ 10,000,000
Contingent milestone payments to be made								70,000,000
Agios Pharmaceuticals, Inc. | AG-881 | Manufacturing rights
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees								1,000,000
Agios Pharmaceuticals, Inc. | Research and development payments | AG-881
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees								9,000,000
Epizyme
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees														0	0	0	65,000,000
Research and development, period						3 years
Collaboration agreement, termination of agreement, period						120 days
Milestone payments made														$ 0	$ 0	25,000,000	0
Percentage of equity investment ownership				9.00%					11.00%					9.00%	11.00%
Additional equity investments made														$ 0	$ 9,900,000	1,000,000	25,000,000
Equity investment				$ 58,900,000					$ 69,300,000					58,900,000	69,300,000
Epizyme | Amended Agreement with Epizyme
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees						$ 10,000,000
Epizyme | Developmental milestone | Amended Agreement with Epizyme
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments						75,000,000
Epizyme | Regulatory milestone | Amended Agreement with Epizyme
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments						365,000,000
Epizyme | Regulatory milestone | DOT1L Program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments						100,000,000
Epizyme | Sales milestone | Amended Agreement with Epizyme
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments						170,000,000
Epizyme | Clinical development milestone | DOT1L Program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments						$ 35,000,000
Sutro Biopharma, Inc
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees										$ 95,000,000			$ 35,000,000	0	72,600,000	0	26,300,000
Research and development, period										3 years
Research and development additional, period										1 year 6 months
Collaboration agreement, termination of agreement, period										120 days
Collaboration agreement, number of projects | research_targets										6
Ownership percentage										15.00%
Collaboration agreement, performance evaluation | Amino_Acid_Target										5
Milestone payments made														$ 0	$ 0	0	0
Percentage of equity investment ownership				16.00%					15.00%					16.00%	15.00%
Additional equity investments made														$ 0	$ 11,900,000	1,700,000	4,000,000
Equity investment				$ 17,600,000					$ 17,600,000					17,600,000	17,600,000
Sutro Biopharma, Inc | Collaborative arrangement, antibody drug conjugate (ADC)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments													204,000,000
Sutro Biopharma, Inc | Collaborative arrangement, bispecific antibody construct (BAC)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments													$ 279,000,000
Sutro Biopharma, Inc | Collaborative agreement, research and manufacturing
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments										$ 75,000,000
Sutro Biopharma, Inc | Regulatory approval
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments										$ 275,000,000
Bluebird
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees							$ 25,000,000							0	0	74,700,000
Contingent milestone payments to be made							$ 230,000,000
Collaboration agreement, termination of agreement, period							90 days
Milestone payments made														0	0	0
Additional equity investments made														0	0	0
FORMA Therapeutics Holdings, LLC
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees														59,000,000	225,000,000	52,800,000
Collaboration agreement, number of additional agreement | Collaborative_Arrangement	2
Collaboration agreement, term of additional agreement	2 years
Collaboration agreement, payment to exercise additional agreement	$ 375,000,000
Milestone payments made														0	0	0
Additional equity investments made														0	0	0
FORMA Therapeutics Holdings, LLC | Regulatory approval
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments												$ 315,000,000
Research and development, period												4 years
FORMA Therapeutics Holdings, LLC | Research and development payments
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees	$ 225,000,000											$ 200,000,000
FORMA Therapeutics Holdings, LLC | License payments
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments												$ 430,000,000
Upfront fees								20,000,000						68,000,000
FORMA Therapeutics Holdings, LLC | Option to license rights to current and future drug candidates
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaboration agreement, term of additional agreement	3 years 6 months
Acetylon
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees														0	0	50,000,000	0
Milestone payments made														$ 0	$ 0	0	0
Percentage of equity investment ownership				14.00%					10.00%					14.00%	10.00%
Additional equity investments made														$ 15,000,000	$ 0	10,000,000	$ 15,000,000
Equity investment				$ 30,000,000					$ 25,000,000					30,000,000	25,000,000
Acetylon | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments														1,100,000,000
OncoMed
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees														2,500,000	2,500,000	155,000,000
Milestone payments made														$ 70,000,000	$ 0	0
Effective notice period required to be served for termination of agreement														120 days
Codevelopment sharing of global development costs														33.33%
Percentage of equity investment ownership				5.00%					5.00%					5.00%	5.00%
Additional equity investments made														$ 0	$ 0	22,200,000
Equity investment				$ 33,100,000					$ 32,000,000					$ 33,100,000	32,000,000
OncoMed | Subsequent Event
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Milestone payments made			$ 70,000,000
OncoMed | Celgene
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Codevelopment sharing of global development costs														66.67%
OncoMed | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Number of programs | discovery_stage_program														5
Number of anti-cancer stem cell products candidates from pipeline | product_candidate		6
Worldwide licensing rights for Anti-CSC therapeutic candidates, term		60 days
OncoMed | RSPO-LGR CSC pathway or another CSC Pathway | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Number of programs | discovery_stage_program														4
OncoMed | Demcizumab | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contingent milestone payments to be made														$ 790,000,000
OncoMed | Anti-DLL4/VEGF | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contingent milestone payments to be made														505,000,000
OncoMed | Other four biological programs
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contingent milestone payments to be made														440,000,000
OncoMed | Small molecule program | Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contingent milestone payments to be made														100,000,000
NantBioScience
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees											$ 50,000,000			0	50,000,000
Milestone payments made														$ 0	$ 0
Effective notice period required to be served for termination of agreement											30 days
Aggregate collaboration agreement payments											$ 75,000,000
Number of product candidates from pipeline | product_candidate											2
Percentage of equity investment ownership				13.00%					14.00%		14.00%			13.00%	14.00%
Potential future investment											$ 50,000,000
Collaboration agreement, agreement termination milestones, number of product candidates | product_candidate											4
Collaboration agreement, agreement termination milestones, number of data packages for product candidates | data_package											10
Collaboration agreement, agreement termination milestones, expiration period											10 years
Selling, general and administrative											$ 25,000,000
Additional equity investments made											$ 90,000,000			$ 0	$ 90,000,000
Equity investment				$ 90,000,000					$ 90,000,000					$ 90,000,000	90,000,000
MedImmune
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees								$ 450,000,000
Collaboration agreement, termination of agreement, period								9 months
Future cost responsibility, as a percentage														75.00%
Forecasted royalty rate														50.00%
Royalty decrease period								4 years
MedImmune | MEDI4736
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Future royalty rate														70.00%
Lycera
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments							$ 190,000,000
Upfront fees							$ 82,500,000							$ 87,000,000
Collaboration agreement, termination of agreement, period							6 months
Milestone payments made														$ 0
Percentage of equity investment ownership				8.00%										8.00%
Additional equity investments made														$ 10,000,000
Equity investment				$ 10,000,000										10,000,000
Initial term of agreement							3 years
Lycera | Research and development payments
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees							$ 69,500,000
Lycera | Research and development payments | Other non-current assets
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees							13,000,000
Equity investment							10,000,000
Payment made for warrant rights							3,000,000
Lycera | License payments
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees				$ 17,500,000
Juno Therapeutics
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees							$ 150,000,000							575,100,000
Collaboration agreement, termination of agreement, period							120 days
Ownership percentage							9.00%
Milestone payments made														$ 0
Percentage of equity investment ownership				9.00%										9.00%
Additional equity investments made														$ 424,900,000
Equity investment				$ 401,800,000										401,800,000
Initial term of agreement							10 years
Allocation of cost, as a percentage							30.00%
Payment made to Juno							$ 1,000,000,000
Investment in Juno, shares owned | shares							9.1
Available-for-sale securities in Juno							$ 424,900,000
Juno Therapeutics | Research and development payments
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees							$ 425,100,000
Nurix
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees					$ 149,800,000									149,800,000
Ownership percentage					11.00%
Milestone payments made														$ 0
Percentage of equity investment ownership				11.00%										11.00%
Additional equity investments made														$ 17,000,000
Equity investment				$ 17,000,000										17,000,000
Investment in Nurix					$ 17,000,000
First option to license future programs					45 days
Second option to license future programs					4 years
Nurix | License payments
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Potential milestone payments					$ 405,000,000
Other Collaboration Arrangements
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront fees														69,800,000	103,500,000	243,300,000
Milestone payments made														8,000,000	8,300,000	1,000,000
Additional equity investments made														50,000,000	55,700,000	$ 71,700,000
Equity investment				$ 105,400,000					$ 132,700,000					105,400,000	$ 132,700,000
Other Collaboration Arrangements | Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contingent milestone payments to be made														$ 120,000,000

XML

Collaboration Agreements (Schedule of Collaboration Agreements) (Details) - USD ($) $ in Millions	1 Months Ended					12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Jan. 31, 2014	Dec. 31, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Intangible Asset Balance						$ 10,858.1	$ 4,067.6
Acceleron
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						0.0	0.0	$ 0.0	$ 70.0
Milestones						0.0	0.0	17.0	27.5
Extension/ Termination of Agreements						0.0	0.0	0.0	0.0
Amortization of Prepaid Research and Development						0.0	0.0	0.0	0.0
Equity Investments Made During Period						0.0	52.4	10.0	30.5
Intangible Asset Balance						0.0	0.0
Equity Investment Balance						$ 224.9	$ 179.7
Percentage of Outstanding Equity						14.00%	14.00%
Acetylon
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						$ 0.0	$ 0.0	50.0	0.0
Milestones						0.0	0.0	0.0	0.0
Extension/ Termination of Agreements						0.0	0.0	0.0	0.0
Amortization of Prepaid Research and Development						20.2	15.3	4.3	0.0
Equity Investments Made During Period						15.0	0.0	10.0	15.0
Intangible Asset Balance						0.2	20.4
Equity Investment Balance						$ 30.0	$ 25.0
Percentage of Outstanding Equity						14.00%	10.00%
Agios
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						$ 9.0	$ 0.0	0.0	121.2
Milestones						0.0	0.0	0.0	0.0
Extension/ Termination of Agreements						0.0	20.0	20.0	20.0
Amortization of Prepaid Research and Development						0.0	0.0	0.0	0.0
Equity Investments Made During Period						0.0	38.3	12.8	37.5
Intangible Asset Balance						1.0	0.0
Equity Investment Balance						$ 340.4	$ 587.4
Percentage of Outstanding Equity						13.00%	14.00%
AstraZeneca
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						$ 450.0
Milestones						0.0
Extension/ Termination of Agreements						0.0
Amortization of Prepaid Research and Development						0.0
Equity Investments Made During Period						0.0
Intangible Asset Balance						0.0
Bluebird
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees		$ 25.0				0.0	$ 0.0	74.7
Milestones						0.0	0.0	0.0
Extension/ Termination of Agreements						0.0	0.0	0.0
Amortization of Prepaid Research and Development						4.9	0.1	0.0
Equity Investments Made During Period						0.0	0.0	0.0
Intangible Asset Balance						20.2	0.1
Epizyme
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						0.0	0.0	0.0	65.0
Milestones						0.0	0.0	25.0	0.0
Extension/ Termination of Agreements						10.0	0.0	0.0	0.0
Amortization of Prepaid Research and Development						0.0	0.0	0.0	0.0
Equity Investments Made During Period						0.0	9.9	1.0	25.0
Intangible Asset Balance						0.0	0.0
Equity Investment Balance						$ 58.9	$ 69.3
Percentage of Outstanding Equity						9.00%	11.00%
FORMA
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						$ 59.0	$ 225.0	52.8
Milestones						0.0	0.0	0.0
Extension/ Termination of Agreements						0.0	0.0	0.0
Amortization of Prepaid Research and Development						0.0	0.1	0.0
Equity Investments Made During Period						0.0	0.0	0.0
Intangible Asset Balance						0.1	0.1
Juno Therapeutics
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees		150.0				575.1
Milestones						0.0
Extension/ Termination of Agreements						0.0
Amortization of Prepaid Research and Development						0.0
Equity Investments Made During Period						424.9
Intangible Asset Balance						0.0
Equity Investment Balance						$ 401.8
Percentage of Outstanding Equity						9.00%
Lycera
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees		$ 82.5				$ 87.0
Milestones						0.0
Extension/ Termination of Agreements						0.0
Amortization of Prepaid Research and Development						0.0
Equity Investments Made During Period						10.0
Intangible Asset Balance						3.0
Equity Investment Balance						$ 10.0
Percentage of Outstanding Equity						8.00%
NantBioScience
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees				$ 50.0		$ 0.0	50.0
Milestones						0.0	0.0
Extension/ Termination of Agreements						0.0	0.0
Amortization of Prepaid Research and Development						0.0	0.0
Equity Investments Made During Period				$ 90.0		0.0	90.0
Intangible Asset Balance						0.0	0.0
Equity Investment Balance						$ 90.0	$ 90.0
Percentage of Outstanding Equity				14.00%		13.00%	14.00%
NantBioScience | Selling, general and administrative
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees							$ 25.0
Nurix
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees	$ 149.8					$ 149.8
Milestones						0.0
Extension/ Termination of Agreements						0.0
Amortization of Prepaid Research and Development						0.0
Equity Investments Made During Period						17.0
Intangible Asset Balance						0.2
Equity Investment Balance						$ 17.0
Percentage of Outstanding Equity						11.00%
OncoMed
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						$ 2.5	2.5	155.0
Milestones						70.0	0.0	0.0
Extension/ Termination of Agreements						0.0	0.0	0.0
Amortization of Prepaid Research and Development						0.0	0.0	0.0
Equity Investments Made During Period						0.0	0.0	22.2
Intangible Asset Balance						0.0	0.0
Equity Investment Balance						$ 33.1	$ 32.0
Percentage of Outstanding Equity						5.00%	5.00%
Sutro
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees			$ 95.0		$ 35.0	$ 0.0	$ 72.6	0.0	26.3
Milestones						0.0	0.0	0.0	0.0
Extension/ Termination of Agreements						0.0	0.0	0.0	0.0
Amortization of Prepaid Research and Development						4.8	0.2	2.1	0.2
Equity Investments Made During Period						0.0	11.9	1.7	$ 4.0
Intangible Asset Balance						22.9	12.8
Equity Investment Balance						$ 17.6	$ 17.6
Percentage of Outstanding Equity						16.00%	15.00%
Other Collaboration Arrangements
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront Fees						$ 69.8	$ 103.5	243.3
Milestones						8.0	8.3	1.0
Extension/ Termination of Agreements						8.1	0.0	0.0
Amortization of Prepaid Research and Development						0.9	7.5	0.9
Equity Investments Made During Period						50.0	55.7	$ 71.7
Intangible Asset Balance						25.0	34.4
Equity Investment Balance						$ 105.4	$ 132.7

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Commitments and Contingencies (Details) - USD ($)	1 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Oct. 31, 2012
Abraxis Bio Science, Inc.
Product Liability Contingency [Line Items]
Intangible asset				$ 1,172,000,000
ABRAXANE
Product Liability Contingency [Line Items]
Nonfinancial liabilities		$ 51,900,000	$ 136,300,000
CVR milestone payment		$ 250,000,000.0
Net sales measurement period		1 year
Milestone payment made	$ 300,000,000
ABRAXANE | If Achieved no later than April 1, 2013
Product Liability Contingency [Line Items]
CVR milestone payment		$ 400,000,000.0
ABRAXANE | If Achieved after April 1, 2013 and before the fifth anniversary of the Merger
Product Liability Contingency [Line Items]
CVR milestone payment		$ 300,000,000.0
ABRAXANE | Milestone One
Product Liability Contingency [Line Items]
Royalty rate		2.50%
ABRAXANE | Milestone One | Minimum
Product Liability Contingency [Line Items]
Revenue milestones		$ 1,000,000,000.000
ABRAXANE | Milestone One | Maximum
Product Liability Contingency [Line Items]
Revenue milestones		$ 2,000,000,000.000
ABRAXANE | Milestone Two
Product Liability Contingency [Line Items]
Royalty rate		5.00%
ABRAXANE | Milestone Two | Minimum
Product Liability Contingency [Line Items]
Revenue milestones		$ 2,000,000,000.000
ABRAXANE | Milestone Two | Maximum
Product Liability Contingency [Line Items]
Revenue milestones		$ 3,000,000,000.000
ABRAXANE | Milestone Three
Product Liability Contingency [Line Items]
Royalty rate		10.00%
ABRAXANE | Milestone Three | Minimum
Product Liability Contingency [Line Items]
Revenue milestones		$ 3,000,000,000.000
ABRAXANE | Termination date of December 31, 2025 if sales less than $1.0 billion | Minimum
Product Liability Contingency [Line Items]
Revenue milestones		1,000,000,000.000
ABRAXANE | Termination date of December 31, 2030 or earlier if sales less than $1.0 billion | Minimum
Product Liability Contingency [Line Items]
Revenue milestones		$ 1,000,000,000.000

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Commitments and Contingencies (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leases
2016	$ 56.1
2017	47.9
2018	35.1
2019	24.1
2020	19.6
Thereafter	49.5
Total minimum lease payments	232.3
Total rental expense under operating leases	66.2	$ 62.2	$ 50.9
Lines of Credit:
Derivative contract notional amount	9,275.0
Letters of credit and guarantees issued on behalf of subsidiaries	101.7
Other Commitments:
Product supply contract obligation	183.7
Commited investment	$ 20.4

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Commitments and Contingencies (Details 3)					1 Months Ended			12 Months Ended
	Jul. 30, 2015 lawsuit	Apr. 11, 2014 lawsuit	Oct. 02, 2013 lawsuit	Jun. 07, 2013	Dec. 31, 2015 USD ($)	Jul. 31, 2014 shareholder	Feb. 28, 2014 lawsuit	Dec. 31, 2015 USD ($)
Manufacturing Facility Repayment Obligation [Line Items]
Number of claims filed | lawsuit	4	4	1
Number of claims dismissed | lawsuit		2
Final decision of patent dispute, in years (no later than)								1 year
Civil qui tam actions | lawsuit							3
Number of shareholders who demanded corporate action | shareholder						2
Limit on equity grants to non-employee directors, period (at least)					4 years
Switzerland
Manufacturing Facility Repayment Obligation [Line Items]
Contractual obligation | $					$ 4,000,000			$ 4,000,000
Revlimid Royalty
Manufacturing Facility Repayment Obligation [Line Items]
Royalty rate (as a percent)				0.01
Pomalyst Royalty
Manufacturing Facility Repayment Obligation [Line Items]
Royalty rate (as a percent)				0.025
Children's Medical Center Corporation
Manufacturing Facility Repayment Obligation [Line Items]
Range of possible loss minimum | $					0			0
Range of possible loss maximum | $					$ 141,300,000			$ 141,300,000

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Geographic and Product Information (Revenue and Long-Lived Assets) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operations by Geographic Area
Total revenues	$ 2,563.3	$ 2,334.1	$ 2,277.8	$ 2,080.8	$ 2,085.5	$ 1,982.2	$ 1,872.7	$ 1,730.0	$ 9,256.0	$ 7,670.4	$ 6,493.9
Total long lived assets	814.1				642.6				814.1	642.6
United States
Operations by Geographic Area
Total revenues									5,604.0	4,482.8	3,862.1
Total long lived assets	585.5				406.1				585.5	406.1
Europe
Operations by Geographic Area
Total revenues									2,624.3	2,310.8	1,865.7
Total long lived assets	215.2				222.2				215.2	222.2
All other
Operations by Geographic Area
Total revenues									1,027.7	876.8	$ 766.1
Total long lived assets	$ 13.4				$ 14.3				$ 13.4	$ 14.3

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Geographic and Product Information (Revenue by Product) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues by Product
Total net product sales									$ 9,161.1	$ 7,563.8	$ 6,362.3
Other revenue									94.9	106.6	131.6
Total revenue	$ 2,563.3	$ 2,334.1	$ 2,277.8	$ 2,080.8	$ 2,085.5	$ 1,982.2	$ 1,872.7	$ 1,730.0	9,256.0	7,670.4	6,493.9
REVLIMID
Revenues by Product
Total net product sales									5,801.1	4,980.0	4,280.3
ABRAXANE
Revenues by Product
Total net product sales									967.5	848.2	648.9
POMALYST/IMNOVID
Revenues by Product
Total net product sales									983.3	679.7	305.4
OTEZLA
Revenues by Product
Total net product sales									471.7	69.8	0.0
VIDAZA
Revenues by Product
Total net product sales									590.7	611.9	803.3
Azacitidine
Revenues by Product
Total net product sales									83.9	78.2	23.3
THALOMID
Revenues by Product
Total net product sales									185.4	221.2	244.5
ISTODAX
Revenues by Product
Total net product sales									69.1	65.6	54.0
Other
Revenues by Product
Total net product sales									$ 8.4	$ 9.2	$ 2.6

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Geographic and Product Information (Major Customers) (Details) - Customers' concentration risk	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amerisource Bergen Corp. | Percent of Total Revenue
Major Customers
Percentage of concentration risk	8.10%	9.00%	10.70%
Amerisource Bergen Corp. | Percent of Net Accounts Receivable
Major Customers
Percentage of concentration risk	8.20%	9.70%
CVS | Percent of Total Revenue
Major Customers
Percentage of concentration risk	10.70%	9.80%	9.30%
CVS | Percent of Net Accounts Receivable
Major Customers
Percentage of concentration risk	8.20%	7.60%

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Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Data [Abstract]
Total revenue	$ 2,563.3	$ 2,334.1	$ 2,277.8	$ 2,080.8	$ 2,085.5	$ 1,982.2	$ 1,872.7	$ 1,730.0	$ 9,256.0	$ 7,670.4	$ 6,493.9
Gross profit	2,433.8	2,202.7	2,153.3	1,951.2	1,951.7	1,859.1	1,745.7	1,621.4	8,741.0	7,177.9
Income tax provision	184.5	14.2	114.6	108.2	96.9	69.0	109.0	52.6	421.5	327.5	215.5
Net income	$ 561.0	$ (34.1)	$ 356.2	$ 718.9	$ 613.9	$ 508.5	$ 597.8	$ 279.7	$ 1,602.0	$ 1,999.9	$ 1,449.9
Net income per share attributable to Celgene
Basic (in dollars per share)	$ 0.71	$ (0.04)	$ 0.45	$ 0.90	$ 0.77	$ 0.64	$ 0.75	$ 0.34	$ 2.02	$ 2.49	$ 1.75
Diluted (in dollars per share)	$ 0.69	$ (0.04)	$ 0.43	$ 0.86	$ 0.74	$ 0.61	$ 0.72	$ 0.33	$ 1.94	$ 2.39	$ 1.68
Weighted average shares:
Basic (in shares)	785.8	791.1	793.0	798.9	800.2	799.6	799.6	811.5	792.2	802.7	827.7
Diluted (in shares)	816.5	791.1	825.3	834.1	834.6	832.8	831.0	845.1	824.9	836.0	860.6

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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 42.3	$ 55.5	$ 46.3
Charged to Expense or Sales	127.9	87.7	90.1
Deductions	122.5	100.9	80.9
Balance at End of Year	47.7	42.3	55.5
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	20.6	27.9	21.8
Charged to Expense or Sales	(0.1)	(2.7)	6.2
Deductions	2.4	4.6	0.1
Balance at End of Year	18.1	20.6	27.9
Allowance for customer discounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	11.5	12.1	11.2
Charged to Expense or Sales	111.7	87.9	74.3
Deductions	111.0	88.5	73.4
Balance at End of Year	12.2	11.5	12.1
Subtotal
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	32.1	40.0	33.0
Charged to Expense or Sales	111.6	85.2	80.5
Deductions	113.4	93.1	73.5
Balance at End of Year	30.3	32.1	40.0
Allowance for sales returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	10.2	15.5	13.3
Charged to Expense or Sales	16.3	2.5	9.6
Deductions	9.1	7.8	7.4
Balance at End of Year	$ 17.4	$ 10.2	$ 15.5