10-K

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☒   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

Commission file number 1-3285

3M COMPANY

State of Incorporation: Delaware I.R.S. Employer Identification No. 41-0417775

Principal executive offices: 3M Center, St. Paul, Minnesota 55144

Telephone number: (651) 733-1110

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 EUR 500 Million Notes due 2018 EUR 750 Million Notes due 2026 EUR 650 Million Notes due 2020 EUR 600 Million Notes due 2023 EUR 500 Million Notes due 2030	New York Stock Exchange, Inc. Chicago Stock Exchange, Inc. New York Stock Exchange, Inc. New York Stock Exchange, Inc. New York Stock Exchange, Inc. New York Stock Exchange, Inc. New York Stock Exchange, Inc.

Note: The common stock of the Registrant is also traded on the SWX Swiss Exchange.

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  ☒    No ☐

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  ☐    No  ☒

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  ☒    No  ☐

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 during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes  ☒    No  ☐

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.  ☒

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 ☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Act).   Yes  ☐     No  ☒

The aggregate market value of voting stock held by nonaffiliates of the Registrant, computed by reference to the closing price and shares outstanding, was approximately $91.4 billion as of January 31, 2016 (approximately $96.4 billion as of June 30, 2015, the last business day of the Registrant’s most recently completed second quarter).

Shares of common stock outstanding at January 31, 2016: 605,038,186

DOCUMENTS INCORPORATED BY REFERENCE

Parts of the Company’s definitive proxy statement (to be filed pursuant to Regulation 14A within 120 days after Registrant’s fiscal year-end of December 31, 2015) for its annual meeting to be held on May 10, 2016, are incorporated by reference in this Form 10-K in response to Part III, Items 10, 11, 12, 13 and 14.

3M COMPANY

FORM 10-K

For the Year Ended December 31, 2015

TABLE OF CONTENTS

		Beginning Page
PART I
ITEM 1	Business	3
ITEM 1A	Risk Factors	9
ITEM 1B	Unresolved Staff Comments	12
ITEM 2	Properties	12
ITEM 3	Legal Proceedings	12
ITEM 4	Mine Safety Disclosures	12
PART II
ITEM 5	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	13
ITEM 6	Selected Financial Data	15
ITEM 7	Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
ITEM 7A	Quantitative and Qualitative Disclosures About Market Risk	45
ITEM 8	Financial Statements and Supplementary Data	47
	Index to Financial Statements	47
ITEM 9	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	118
ITEM 9A	Controls and Procedures	118
ITEM 9B	Other Information	118
PART III
ITEM 10	Directors, Executive Officers and Corporate Governance	119
ITEM 11	Executive Compensation	119
ITEM 12	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	119
ITEM 13	Certain Relationships and Related Transactions, and Director Independence	120
ITEM 14	Principal Accounting Fees and Services	120
PART IV
ITEM 15	Exhibits, Financial Statement Schedules	121

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3M COMPANY

ANNUAL REPORT ON FORM 10-K

For the Year Ended December 31, 2015

PART I

Item 1. Business.

3M Company was incorporated in 1929 under the laws of the State of Delaware to continue operations begun in 1902. The Company’s ticker symbol is MMM. As used herein, the term “3M” or “Company” includes 3M Company and its subsidiaries unless the context indicates otherwise. In this document, for any references to Note 1 through Note 18, refer to the Notes to Consolidated Financial Statements in Item 8.

Available Information

The SEC maintains a website that contains reports, proxy and information statements, and other information regarding issuers, including the Company, that file electronically with the SEC. The public can obtain any documents that the Company files with the SEC at http://www.sec.gov. The Company files annual reports, quarterly reports, proxy statements and other documents with the Securities and Exchange Commission (SEC) under the Securities Exchange Act of 1934 (Exchange Act). The public may read and copy any materials that the Company files with the SEC at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330.

3M also makes available free of charge through its website (http://investor.3M.com) the Company’s Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and, if applicable, amendments to those reports filed or furnished pursuant to the Exchange Act as soon as reasonably practicable after the Company electronically files such material with, or furnishes it to, the SEC.

General

3M is a diversified technology company with a global presence in the following businesses: Industrial; Safety and Graphics; Health Care; Electronics and Energy; and Consumer. 3M is among the leading manufacturers of products for many of the markets it serves. Most 3M products involve expertise in product development, manufacturing and marketing, and are subject to competition from products manufactured and sold by other technologically oriented companies.

At December31, 2015, the Company employed 89,446 people (full-time equivalents), with 35,973 employed in the United States and 53,473 employed internationally.

Business Segments

As described in Note 16, effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions.

3M manages its operations in five business segments: Industrial; Safety and Graphics; Health Care;Electronics and Energy; and Consumer. 3M’s five business segments bring together common or related 3M technologies, enhancing the development of innovative products and services and providing for efficient sharing of business resources. Financial information and other disclosures relating to 3M’s business segments and operations in major geographic areas are provided in the Notes to Consolidated Financial Statements.

Industrial Business: The Industrial segment serves a broad range of markets, such as automotive original equipment manufacturer (OEM) and automotive aftermarket (auto body shops and retail), electronics, appliance, paper and printing, packaging, food and beverage, and construction. Industrial products include tapes, a wide variety of coated, non-woven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, 3M purification (filtration products), closure systems for personal hygiene products, acoustic systems products, and components and products that are used in the manufacture, repair and maintenance of automotive, marine, aircraft and specialty vehicles. 3M is also a leading

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global supplier of precision grinding technology serving customers in the area of hard-to-grind precision applications in industrial, automotive, aircraft and cutting tools.3M develops and produces advanced technical ceramics for demanding applications in the automotive, oil and gas, solar, industrial, electronics and defense industries. In August 2015, 3M acquired assets and liabilities associated with Polypore International, Inc.’s Separations Media business, a leading provider of microporous membranes and modules for filtration in the life sciences, industrial and specialty segments.

Major industrial products include vinyl, polyester, foil and specialty industrial tapes and adhesives; Scotch® Masking Tape, Scotch® Filament Tape and Scotch® Packaging Tape; packaging equipment; 3M™ VHB™ Bonding Tapes; conductive, low surface energy, sealants, hot melt, spray and structural adhesives; reclosable fasteners; label materials for durable goods; and coated, nonwoven and microstructured surface finishing and grinding abrasives for the industrial market. 3M purification provides a comprehensive line of filtration products for the separation, clarification and purification of fluids and gases. Other industrial products include fluoroelastomers for seals, tubes and gaskets in engines.

Major transportation products include insulation components, including Thinsulate™ Acoustic Insulation and components for cabin noise reduction and catalytic converters; functional and decorative graphics; abrasion-resistant films; adhesives; sealants; masking tapes; fasteners and tapes for attaching nameplates, trim, moldings, interior panels and carpeting; coated, nonwoven and microstructured finishing and grinding abrasives; structural adhesives; and other specialty materials. In addition, 3M provides paint finishing and detailing products, including a complete system of cleaners, dressings, polishes, waxes and other products.

Safety and Graphics Business: The Safety and Graphics segment serves a broad range of markets that increase the safety, security and productivity of people, facilities and systems. Major product offerings include personal protection products; traffic safety and security products, including border and civil security solutions; commercial solutions, including commercial graphics sheeting and systems, architectural design solutions for surfaces, and cleaning and protection products for commercial establishments; and roofing granules for asphalt shingles. In August 2015, 3M acquired Capital Safety Group S.A.R.L., a leading global provider of fall protection equipment.

This segment’s products include personal protection products, such as certain disposable and reusable respirators, personal protective equipment, head and face protection, body protection, hearing protection and protective eyewear, plus reflective materials that are widely used on apparel, footwear and accessories, enhancing visibility in low-light situations. In traffic safety and security, 3M provides reflective sheeting used on highway signs, vehicle license plates, construction work-zone devices, trucks and other vehicles, and also provides pavement marking systems, in addition to electronic surveillance products, and films that protect against counterfeiting. Traffic safety and security also provides finger, palm, face and iris biometric systems for governments, law enforcement agencies, and commercial enterprises, in addition to remote people-monitoring technologies used for offender-monitoring applications. Major commercial graphics products include films, inks, and related products used to produce graphics for vehicles, signs and interior surfaces. Other products include spill-control sorbents; nonwoven abrasive materials for floor maintenance and commercial cleaning; floor matting; natural and color-coated mineral granules for asphalt shingles; plus fall protection equipment.

Health Care Business: The Health Care segment serves markets that include medical clinics and hospitals, pharmaceuticals, dental and orthodontic practitioners, health information systems, and food manufacturing and testing. Products and services provided to these and other markets include medical and surgical supplies, skin health and infection prevention products, inhalation and transdermal drug delivery systems, oral care solutions (dental and orthodontic products), health information systems, and food safety products. In April 2014, 3M purchased all of the outstanding equity interests of Treo Solutions LLC, headquartered in Troy, New York. Treo Solutions LLC is a provider of data analytics and business intelligence to healthcare payers and providers. In March 2015, 3M acquired Ivera Medical Corp., a manufacturer of health care products that disinfect and protect devices used for access into a patient’s bloodstream.

In the medical and surgical areas, 3M is a supplier of medical tapes, dressings, wound closure products, orthopedic casting materials, electrodes and stethoscopes. In infection prevention, 3M markets a variety of surgical drapes, masks and preps, as well as sterilization assurance equipment and patient warming solutions designed to prevent hypothermia in

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surgical settings. Other products include drug delivery systems, such as metered-dose inhalers, transdermal skin patches and related components. Oral care solutions include restoratives, adhesives, finishing and polishing products, crowns, impression materials, preventive sealants, professional tooth whiteners, prophylaxis and orthodontic appliances, as well as digital workflow solutions to transform traditional impression and analog processes. In health information systems, 3M develops and markets computer software for hospital coding and data classification, and provides related consulting services. 3M provides food safety products that make it faster and easier for food processors to test the microbiological quality of food.

Electronics and Energy Business: The Electronics and Energy segment serves customers in electronics and energy markets, including solutions that improve the dependability, cost-effectiveness, and performance of electronic devices; electrical products, including infrastructure protection; telecommunications networks, and power generation and distribution.

This segment’s electronics solutions include the display materials and systems business, which provides films that serve numerous market segments of the electronic display industry. 3M provides distinct products for five market segments, including products for: 1) LCD computer monitors 2) LCD televisions 3) handheld devices such as cellular phones and tablets 4) notebook PCs and 5) automotive displays. This segment also provides desktop and notebook computer screen filters that address display light control, privacy, and glare reduction needs. Major electronics products also include packaging and interconnection devices; high performance fluids and abrasives used in the manufacture of computer chips, and for cooling electronics and lubricating computer hard disk drives; and high-temperature and display tapes. Flexible circuits use electronic packaging and interconnection technology, providing more connections in less space, and are used in ink-jet printer cartridges, cell phones and electronic devices. This segment also includes the touch systems products, including touch screens, touch monitors, and touch sensor components.

This segment’s energy solutions include electrical products, including infrastructure protection, telecommunications, and renewable energy. This segment serves the worlds electrical and telecommunications markets, including electrical utilities, electrical construction, maintenance and repair, original equipment manufacturers (OEM), telecommunications central office, outside plant and enterprise, as well as aerospace, military, automotive and medical markets, with products that enable the efficient transmission of electrical power and speed the delivery of information. Products in this segment include pressure sensitive tapes and resins, electrical insulation, a wide array of fiber-optic and copper-based telecommunications systems for rapid deployment of fixed and wireless networks, as well as the 3M™ Aluminum Conductor Composite Reinforced (ACCR) electrical power cable that increases transmission capacity for existing power lines. This segment also includes renewable energy component solutions for the solar and wind power industries, as well as infrastructure products solutions that provide municipalities both protection and detection solutions for electrical, oil, natural gas, water, rebar and other infrastructure assets.

Consumer Business: The Consumer segment serves markets that include consumer retail, office retail, office business to business, home improvement, drug and pharmacy retail, and other markets. Products in this segment include office supply products, stationery products, construction and home improvement products (do-it-yourself), home care products, protective material products, certain consumer retail personal safety products, and consumer health care products.

Major consumer products include Scotch® brand products, such as Scotch® Magic™ Tape, Scotch® Glue Stick and Scotch® Cushioned Mailer; Post-it® Products, such as Post-it® Flags, Post-it® Note Pads, Post-it® Labeling & Cover-up Tape, and Post-it® Pop-up Notes and Dispensers; construction and home improvement products, including surface-preparation and wood-finishing materials, Command™ Adhesive Products and Filtrete™ Filters for furnaces and air conditioners; home care products, including Scotch-Brite® Scour Pads, Scotch-Brite® Scrub Sponges, Scotch-Brite® Microfiber Cloth products, O-Cel-O™ Sponges; protective material products, such as Scotchgard™ Fabric Protectors; certain maintenance-free respirators; certain consumer retail personal safety products, including safety glasses, hearing protectors, and 3M Thinsulate™ Insulation, which is used in jackets, pants, gloves, hats and boots to keep people warm; Nexcare™ Adhesive Bandages; and ACE® branded (and related brands) elastic bandage, supports and thermometer product lines.

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Distribution

3M products are sold through numerous distribution channels, including directly to users and through numerous wholesalers, retailers, jobbers, distributors and dealers in a wide variety of trades in many countries around the world. Management believes the confidence of wholesalers, retailers, jobbers, distributors and dealers in 3M and its products — a confidence developed through long association with skilled marketing and sales representatives — has contributed significantly to 3M’s position in the marketplace and to its growth.

Research and Patents

Research and product development constitutes an important part of 3M’s activities and has been a major driver of 3M’s sales and profit growth. Research, development and related expenses totaled $1.763 billion in 2015, $1.770 billion in 2014 and $1.715 billion in 2013. Research and development, covering basic scientificresearch and the application of scientific advances in the development of new and improved products and their uses, totaled $1.223 billion in 2015, $1.193 billion in 2014 and $1.150 billion in 2013. Related expenses primarily include technical support; internally developed patent costs, which include costs and fees incurred to prepare, file, secure and maintain patents; amortization of externally acquired patents and externally acquired in-process research and development; and gains/losses associated with certain corporate approved investments in R&D-related ventures, such as equity method effects and impairments.

The Company’s products are sold around the world under various trademarks. The Company also owns, or holds licenses to use, numerous U.S. and foreign patents. The Company’s research and development activities generate a steady stream of inventions that are covered by new patents. Patents applicable to specific products extend for varying periods according to the date of patent application filing or patent grant and the legal term of patents in the various countries where patent protection is obtained. The actual protection afforded by a patent, which can vary from country to country, depends upon the type of patent, the scope of its coverage and the availability of legal remedies in the country.

The Company believes that its patents provide an important competitive advantage in many of its businesses. In general, no single patent or group of related patents is in itself essential to the Company as a whole or to any of the Company’s business segments. The importance of patents in the Electronics and Energy segment is described in “Performance by Business Segment” — “Electronics and Energy Business” in Part II, Item 7, of this Annual Report on Form 10-K.

Raw Materials

In 2015, the Company experienced declining costs for most raw material categories and transportation fuel, due largely to the significant price decreases in crude oil. This in turn drove year-on-year cost decreases in many feedstock categories, including petroleum based materials, minerals, metals and wood pulp based products. To date, the Company is receiving sufficient quantities of all raw materials to meet its reasonably foreseeable production requirements. It is impossible to predict future shortages of raw materials or the impact any such shortages would have. 3M has avoided disruption to its manufacturing operations through careful management of existing raw material inventories and development and qualification of additional supply sources. 3M manages commodity price risks through negotiated supply contracts, price protection agreements and forward contracts.

Environmental Law Compliance

3M’s manufacturing operations are affected by national, state and local environmental laws around the world. 3M has made, and plans to continue making, necessary expenditures for compliance with applicable laws. 3M is also involved in remediation actions relating to environmental matters from past operations at certain sites (refer to “Environmental Matters and Litigation” in Note 14, Commitments and Contingencies).

Environmental expenditures relating to existing conditions caused by past operations that do not contribute to current or future revenues are expensed. Reserves for liabilities for anticipated remediation costs are recorded on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies, the Company’s commitment to a plan of action, or approval by regulatory agencies. Environmental expenditures for capital

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projects that contribute to current or future operations generally are capitalized and depreciated over their estimated useful lives.

In 2015, 3M expended about $26 million for capital projects related to protecting the environment. This amount excludes expenditures for remediation actions relating to existing matters caused by past operations that do not contribute to current or future revenues, which are expensed. Capital expenditures for environmental purposes have included pollution control devices — such as wastewater treatment plant improvements, scrubbers, containment structures, solvent recovery units and thermal oxidizers — at new and existing facilities constructed or upgraded in the normal course of business. Consistent with the Company’s emphasis on environmental responsibility, capital expenditures (other than for remediation projects) for known projects are presently expected to be about $51 million over the next two years for new or expanded programs to build facilities or modify manufacturing processes to minimize waste and reduce emissions.

While the Company cannot predict with certainty the future costs of such cleanup activities, capital expenditures or operating costs for environmental compliance, the Company does not believe they will have a material effect on its capital expenditures, earnings or competitive position.

Executive Officers

Following is a list of the executive officers of 3M, and their age, present position, the year elected to their present position and other positions they have held during the past five years. No family relationships exist among any of the executive officers named, nor is there any undisclosed arrangement or understanding pursuant to which any person was selected as an officer. This information is presented in the table below as of the date of the 10-K filing (February 11, 2016).

Name	Age	Present Position	Year  Elected to Present Position	Other Positions Held During 2011-2015
Inge G. Thulin	62	Chairman of the Board, President and Chief Executive Officer	2012	President and Chief Executive Officer, 2012 Executive Vice President and Chief Operating Officer, 2011-2012 Executive Vice President, International Operations, 2004-2011
James L. Bauman	56	Executive Vice President, Electronics and Energy Business Group	2015	Senior Vice President, Business Transformation, Americas, 2015 Senior Vice President, Asia Pacific, 2012-2014 Vice President and General Manager, Optical Systems Division, 2008-2012
Julie L. Bushman	54	Senior Vice President, Business Transformation and Information Technology	2013	Executive Vice President, Safety and Graphics, 2012-2013 Executive Vice President, Safety, Security and Protection Services Business, 2011-2012 Vice President and General Manager, Occupational Health and Environmental Safety Division, 2007-2011
Joaquin Delgado	56	Executive Vice President, Health Care Business Group	2012	Executive Vice President, Electro and Communications Business, 2009-2012
Ivan K. Fong	54	Senior Vice President, Legal Affairs and General Counsel	2012	General Counsel, U.S. Department of Homeland Security, 2009-2012
Nicolas C. Gangestad	51	Senior Vice President and Chief Financial Officer	2014	Vice President, Corporate Controller and Chief Accounting Officer, 2011-2014 Director, Corporate Accounting, 2007-2011

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Executive Officers (continued)

Name	Age	Present Position	Year  Elected to Present Position	Other Positions Held During 2011-2015
Paul A. Keel	46	Senior Vice President, Supply Chain	2014	Managing Director, 3M United Kingdom-Ireland Region, 2013-2014 Vice President and General Manager, Skin and Wound Care Division, 2010-2013
Ashish K. Khandpur	48	Senior Vice President, Research and Development, and Chief Technology Officer	2014	Vice President and General Manager, Personal Safety Division, 2014 Vice President, Research and Development, Industrial Business Group, 2013 Vice President, Research and Development, Industrial and Transportation Business, 2012 Technical Director, Industrial and Transportation Business, Asia Pacific, 2011 Technical Director, 3M India and Sri Lanka, and Technical Director, Industrial and Transportation Business, Asia Pacific, 2010-2011
Jon T. Lindekugel	52	Senior Vice President, Business Development and Marketing-Sales	2015	Senior Vice President, Business Development, 2014-2015 President, Health Information Systems Inc., 2008-2014
Frank R. Little	55	Executive Vice President, Safety and Graphics Business Group	2013	Vice President and General Manager, Personal Safety Division, 2013 Vice President and General Manager, Occupational Health and Environmental Safety Division, 2011-2012 Managing Director, 3M Korea, 2008-2011
Marlene M. McGrath	53	Senior Vice President, Human Resources	2012	Vice President, Human Resources, International Operations, 2010-2012
Kimberly F. Price	56	Senior Vice President, Corporate Communications and Enterprise Services	2016	Vice President, 3Mgives, 2013-2015 Vice President, Community Affairs, 2012-2013 Assistant General Counsel, Office of General Counsel, 2000-2012
Michael F. Roman	56	Executive Vice President, Industrial Business Group	2014	Senior Vice President, Business Development, 2013-2014 Vice President and General Manager, Industrial Adhesives and Tapes Division, 2011-2013 Vice President and General Manager, Renewable Energy Division, 2009-2011
Hak Cheol Shin	58	Executive Vice President, International Operations	2011	Executive Vice President, Industrial and Transportation Business, 2006-2011
Jesse G. Singh	50	Senior Vice President, Supply Chain Transformation	2016	President, Health Information Systems, 2015-2016 Senior Vice President, Marketing and Sales, 2014-2015 Vice President and General Manager, Stationery and Office Supplies Division, 2012-2013 President, Sumitomo 3M Limited, 2007-2012
Michael G. Vale	49	Executive Vice President, Consumer Business Group	2012	Executive Vice President, Consumer and Office Business, 2011-2012 Managing Director, 3M Brazil, 2009-2011

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Cautionary Note Concerning Factors That May Affect Future Results

This Annual Report on Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Item 7, contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The Company may also make forward-looking statements in other reports filed with the Securities and Exchange Commission, in materials delivered to shareholders and in press releases. In addition, the Company’s representatives may from time to time make oral forward-looking statements.

Forward-looking statements relate to future events and typically address the Company’s expected future business and financial performance. Words such as “plan,” “expect,” “aim,” “believe,” “project,” “target,” “anticipate,” “intend,” “estimate,” “will,” “should,” “could,” “forecast”  and other words and terms of similar meaning, typically identify such forward-looking statements. In particular, these include, among others, statements relating to:

· the Company’s strategy for growth, future revenues, earnings, cash flow, uses of cash and other measures of financial performance, and market position,

· worldwide economic and capital markets conditions, such as interest rates, foreign currency exchange rates, financial conditions of our suppliers and customers, and natural and other disasters or climate change affecting the operations of the Company or our suppliers and customers,

· new business opportunities, product development, and future performance or results of current or anticipated products,

· the scope, nature or impact of acquisition, strategic alliance and divestiture activities,

· the outcome of contingencies, such as legal and regulatory proceedings,

· future levels of indebtedness, common stock repurchases and capital spending,

· future availability of and access to credit markets,

· pension and postretirement obligation assumptions and future contributions,

· asset impairments,

· tax liabilities,

· information technology security, and

· the effects of changes in tax, environmental and other laws and regulations in the United States and other countries in which we operate.

The Company assumes no obligation to update or revise any forward-looking statements.

Forward-looking statements are based on certain assumptions and expectations of future events and trends that are subject to risks and uncertainties. Actual future results and trends may differ materially from historical results or those reflected in any such forward-looking statements depending on a variety of factors. Important information as to these factors can be found in this document, including, among others, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” under the headings of “Overview,” “Financial Condition and Liquidity” and annually in“Critical Accounting Estimates.”  Discussion of these factors is incorporated by reference from Part I, Item 1A, “Risk Factors,” of this document, and should be considered an integral part of Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” For additional information concerning factors that may cause actual results to vary materially from those stated in the forward-looking statements, see our reports on Form 10-K, 10-Q and 8-K filed with the SEC from time to time.

Item 1A. Risk Factors.

Provided below is a cautionary discussion of what we believe to be the most important risk factors applicable to the Company. Discussion of these factors is incorporated by reference into and considered an integral part of Part II,Item 7, “Management’s Discussion and Analysis of Financial Conditions and Results of Operations.”

* Results are impacted by the effects of, and changes in, worldwide economic, political, and capital markets conditions. The Company operates in more than 70 countries andderives approximately 60 percent of its revenues from outside the United States. The Company’s business is subject to global competition and geopolitical risks and may be adversely affected by factors in the United States and other countries that are beyond its control, such as slower economic growth, disruptions in financial markets, economic downturns in the form of either contained or widespread recessionary

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conditions, inflation, elevated unemployment levels, sluggish or uneven recovery, government deficit reduction and other austerity measures in specific countries or regions, or in the various industries in which the Company operates; social, political or labor conditions in specific countries or regions; natural and other disasters or climate change affecting the operations of the Company or its customers and suppliers; or adverse changes in the availability and cost of capital, interest rates, tax rates, tax laws, or exchange control, ability to expatriate earnings and other regulations in the jurisdictions in which the Company operates.

* Change in the Company’s credit ratings could increase cost of funding.The Company’s credit ratings are important to 3M’s cost of capital.The major rating agencies routinely evaluate the Company’s credit profile and assign debt ratings to 3M. The Company has an AA- credit rating, with a stable outlook, from Standard & Poor’s and an Aa3 credit rating, with a negative outlook, from Moody’s Investors Service. This evaluation is based on a number of factors, which include financial strength, business and financial risk, as well as transparency with rating agencies and timeliness of financial reporting. The Company’s credit ratings have served to lower 3M’s borrowing costs and facilitate access to a variety of lenders. The Company’s ongoing transition to a more optimized capital structure, financed with additional low-cost debt, could impact 3M’s credit rating in the future. Failure to maintain strong investment grade ratings would adversely affect the Company’s cost of funding and could adversely affect liquidity and access to capital markets.

* The Company’s results are affected by competitive conditions and customer preferences. Demand for the Company’s products, which impacts revenue and profit margins, is affected by (i) the development and timing of the introduction of competitive products; (ii) the Company’s response to downward pricing to stay competitive; (iii) changes in customer order patterns, such as changes in the levels of inventory maintained by customers and the timing of customer purchases which may be affected by announced price changes, changes in the Company’s incentive programs, or the customer’s ability to achieve incentive goals; and (iv) changes in customers’ preferences for our products, including the success of products offered by our competitors, and changes in customer designs for their products that can affect the demand for some of the Company’s products.

* Foreign currency exchange rates and fluctuations in those rates may affect the Company’s ability to realize projected growth rates in its sales and earnings. Because the Company’s financial statements are denominated in U.S. dollars and approximately 60 percent of the Company’s revenues are derived from outside the United States, the Company’s results of operations and its ability to realize projected growth rates in sales and earnings could be adversely affected if the U.S. dollar strengthens significantly against foreign currencies.

* The Company’s growth objectives are largely dependent on the timing and market acceptance of its new product offerings, including its ability to continually renew its pipeline of new products and to bring those products to market. This ability may be adversely affected by difficulties or delays in product development, such as the inability to identify viable new products, obtain adequate intellectual property protection, or gain market acceptance of new products. There are no guarantees that new products will prove to be commercially successful.

* The Company’s future results are subject to fluctuations in the costs and availability of purchased components, compounds, raw materials and energy, including oil and natural gas and their derivatives, due to shortages, increased demand, supply interruptions, currency exchange risks, natural disasters and other factors. The Company depends on various components, compounds, raw materials, and energy (including oil and natural gas and their derivatives) supplied by others for the manufacturing of its products. It is possible that any of its supplier relationships could be interrupted due to natural and other disasters and other events, or be terminated in the future. Any sustained interruption in the Company’s receipt of adequate supplies could have a material adverse effect on the Company. In addition, while the Company has a process to minimize volatility in component and material pricing, no assurance can be given that the Company will be able to successfully manage price fluctuations or that future price fluctuations or shortages will not have a material adverse effect on the Company.

* Acquisitions, strategic alliances, divestitures, and other unusual events resulting from portfolio management actions and other evolving business strategies, and possible organizational restructuring could affect future results. The Company monitors its business portfolio and organizational structure and has made and may continue to make acquisitions, strategic alliances, divestitures and changes to its organizational structure. With respect to acquisitions,

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future results will be affected by the Company’s ability to integrate acquired businesses quickly and obtain the anticipated synergies.

* The Company’s future results may be affected if the Company generates fewer productivity improvements than estimated. The Company utilizes various tools, such as Lean Six Sigma,and engages in ongoing global business transformation. Business transformation is defined as changes in processes and internal/external service delivery across 3M to move to more efficient business models to improve operational efficiency and productivity, while allowing 3M to serve customers with greater speed and efficiency. This is enabled by the ongoing multi-year phased implementation of an enterprise resource planning (ERP) system on a worldwide basis.There can be no assurance that all of the projected productivity improvements will be realized.

* The Company employs information technology systems to support its business, including ongoing phased implementation of an ERP system as part of business transformation on a worldwide basis over the next several years. Security breaches and other disruptions to the Company’s information technology infrastructure could interfere with the Company’s operations, compromise information belonging to the Company and its customers,  suppliers, and employees, exposing the Company to liability which could adversely impact the Company’s business and reputation. In the ordinary course of business, the Company relies on information technology networks and systems, some of which are managed by third parties, to process, transmit and store electronic information, and to manage or support a variety of business processes and activities. Additionally, the Company collects and stores certain data, including proprietary business information, and may have access to confidential or personal information in certain of our businesses that is subject to privacy and security laws, regulations and customer-imposed controls. Despite our cybersecurity measures (including employee and third-party training, monitoring of networks and systems, and maintenance of backup and protective systems) which are continuously reviewed and upgraded, the Company’s information technology networks and infrastructure may still be vulnerable to damage, disruptions or shutdowns due to attack by hackers or breaches, employee error or malfeasance, power outages, computer viruses, telecommunication or utility failures, systems failures, service providers including cloud services, natural disasters or other catastrophic events. It is possible for such vulnerabilities to remain undetected for an extended period, up to and including several years. While we have experienced, and expect to continue to experience, these types of threats to the Company’s information technology networks and infrastructure, none of them to date has had a material impact to the Company. There may be other challenges and risks as the Company upgrades and standardizes its ERP system on a worldwide basis. Any such events could result in legal claims or proceedings, liability or penalties under privacy laws, disruption in operations, and damage to the Company’s reputation, which could adversely affect the Company’s business. Although the Company maintains insurance coverage for various cybersecurity risks, there can be no guarantee that all costs or losses incurred will be fully insured.

* The Company's defined benefit pension and postretirement plans are subject to financial market risks that could adversely impact our results. The performance of financial markets and discount rates impact the Company's funding obligations under its defined benefit plans. Significant changes in market interest rates, decreases in the fair value of plan assets and investment losses on plan assets, and relevant legislative or regulatory changes relating to defined benefit plan funding may increase the Company's funding obligations and adversely impact its results of operations and cash flows.

* The Company’s future results may be affected by various legal and regulatory proceedings and legal compliance risks, including those involving product liability, antitrust, intellectual property, environmental, the U.S. Foreign Corrupt Practices Act and other anti-bribery, anti-corruption, or other matters. The outcome of these legal proceedings may differ from the Company’s expectations because the outcomes of litigation, including regulatory matters, are often difficult to reliably predict. Various factors or developments can lead the Company to change current estimates of liabilities and related insurance receivables where applicable, or make such estimates for matters previously not susceptible of reasonable estimates, such as a significant judicial ruling or judgment, a significant settlement, significant regulatory developments or changes in applicable law. A future adverse ruling, settlement or unfavorable development could result in future charges that could have a material adverse effect on the Company’s results of operations or cash flows in any particular period. For a more detailed discussion of the legal proceedings involving the Company and the associated accounting estimates, see the discussion in Note 14 “Commitments and Contingencies” within the Notes to Consolidated Financial Statements.

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Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

3M’s general offices, corporate research laboratories, and certain division laboratories are located in St. Paul, Minnesota. The Company operates 88 manufacturing facilities in 29 states. The Company operates 127 manufacturing and converting facilities in 37 countries outside the United States.

3M owns the majority of its physical properties. 3M’s physical facilities are highly suitable for the purposes for which they were designed. Because 3M is a global enterprise characterized by substantial intersegment cooperation, properties are often used by multiple business segments.

Item 3. Legal Proceedings.

Discussion of legal matters is incorporated by reference from Part II, Item 8, Note 14, “Commitments and Contingencies,” of this document, and should be considered an integral part of Part I, Item 3, “Legal Proceedings.”

Item 4. Mine Safety Disclosures.

Pursuant to Section1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”), the Company is required to disclose, in connection with the mines it operates, information concerning mine safety violations or other regulatory matters in its periodic reports filed with the SEC. For the year 2015, the information concerning mine safety violations or other regulatory matters required by Section1503(a)of the Act is included in Exhibit95 to this annual report.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Equity compensation plans’ information is incorporated by reference from Part III, Item 12, “Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters,” of this document, and should be considered an integral part of Item 5. At January 31, 2016, there were 84,607 shareholders of record. 3M’s stock is listed on the New York Stock Exchange, Inc. (NYSE), the Chicago Stock Exchange, Inc., and the SWX Swiss Exchange. Cash dividends declared and paid totaled $1.025 per share for each of the second, third, and fourth quarters of 2015. Cash dividends declared in the fourth quarter of 2014 included a dividend paid in November2014 of $0.855 per share and a dividend paid in March2015 of $1.025 per share. Cash dividends declared and paid totaled $0.855 per share for each of the second and third quarters of 2014.  Cash dividends declared in the fourth quarter of 2013 include a dividend paid in March 2014 of $0.855 per share. Stock price comparisons follow:

Stock price comparisons (NYSE composite transactions)

(Per share amounts)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
2015 High	$	170.50	$	167.70	$	157.94	$	160.09	$	170.50
2015 Low		157.74		153.92		134.00		138.57		134.00
2014 High	$	139.29	$	145.53	$	147.87	$	168.16	$	168.16
2014 Low		123.61		132.02		138.43		130.60		123.61

Issuer Purchases of Equity Securities

Repurchases of 3M common stock are made to support the Company’s stock-based employee compensation plans and for other corporate purposes. In February 2014, 3M’s Board of Directors authorized the repurchase of up to $12 billion of 3M’s outstanding common stock, with no pre-established end date. In February 2016, 3M’s Board of Directors replaced the Company’s February2014 repurchase program with a new repurchase program. This new program authorizes the repurchase of up to $10 billion of 3M’s outstanding common stock, with no pre-established end date.

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Issuer Purchases of Equity Securities

(registered pursuant to Section 12 of the Exchange Act)

					Maximum
					Approximate
					Dollar Value of
				Total Number of	Shares that May
				Shares Purchased	Yet Be Purchased
	Total Number of	Average Price		as Part of Publicly	under the Plans
	Shares Purchased	Paid per		Announced Plans	or Programs
Period	(1)	Share		or Programs (2)	(Millions)
January 1-31, 2015	1,628,420	$	161.61	1,628,420	$	6,440
February 1-28, 2015	1,451,986	$	166.64	1,449,538	$	6,198
March 1-31, 2015	2,001,351	$	164.58	2,000,848	$	5,869
Total January 1-March 31, 2015	5,081,757	$	164.22	5,078,806	$	5,869
April 1-30, 2015	2,937,143	$	160.60	2,934,726	$	5,398
May 1-31, 2015	3,966,294	$	160.30	3,966,100	$	4,762
June 1-30, 2015	4,294,763	$	157.50	4,294,763	$	4,085
Total April 1-June 30, 2015	11,198,200	$	159.30	11,195,589	$	4,085
July 1-31, 2015	4,943,483	$	154.28	4,943,483	$	3,323
August 1-31, 2015	2,428,004	$	144.75	2,428,004	$	2,971
September 1-30, 2015	2,371,046	$	140.13	2,369,922	$	2,639
Total July 1-September 30, 2015	9,742,533	$	148.46	9,741,409	$	2,639
October 1-31, 2015	1,922,628	$	151.09	1,922,628	$	2,349
November 1-30, 2015	2,052,151	$	157.89	2,051,444	$	2,025
December 1-31, 2015	3,669,029	$	152.01	3,669,029	$	1,467
Total October 1-December 31, 2015	7,643,808	$	153.36	7,643,101	$	1,467
Total January 1-December 31, 2015	33,666,298	$	155.56	33,658,905	$	1,467

(1) The total number of shares purchased includes: (i) shares purchased under the Board’s authorizations described above, and (ii) shares purchased in connection with the exercise of stock options.

(2) The total number of shares purchased as part of publicly announced plans or programs includes shares purchased under the Board’s authorizations described above.

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Item 6. Selected Financial Data.

(Dollars in millions, except per share amounts)	2015		2014		2013		2012		2011
Years ended December 31:
Net sales	$	30,274	$	31,821	$	30,871	$	29,904	$	29,611
Net income attributable to 3M		4,833		4,956		4,659		4,444		4,283
Per share of 3M common stock:
Net income attributable to 3M — basic		7.72		7.63		6.83		6.40		6.05
Net income attributable to 3M — diluted		7.58		7.49		6.72		6.32		5.96
Cash dividends declared per 3M common share		3.075		3.59		3.395		2.36		2.20
Cash dividends paid per 3M common share		4.10		3.42		2.54		2.36		2.20
At December 31:
Total assets	$	32,718	$	31,209	$	33,304	$	33,841	$	31,584
Long-term debt (excluding portion due within one year) and long-term capital lease obligations		8,799		6,764		4,367		4,970		4,549

In 2015, 3M’s Board of Directors declared a second, third, and fourth quarter dividend of $1.025 per share, which resulted in total year 2015 declared dividends of $3.075 per share. In December2014, 3M’s Board of Directors declared a first-quarter 2015 dividend of $1.025 per share (paid in March2015), which when added to second, third, and fourth quarter 2014 declared dividends of $0.855 per share, resulted in total year 2014 declared dividends of $3.59 per share. In December2013, 3M’s Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (paid in March2014). This resulted in total year 2013 declared dividends of $3.395 per share, with $2.54 per share paid in 2013 and the additional $0.855 per share paid in March2014.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Management’s Discussion and Analysis of Financial Condition and Results of Operations (MD&A) is designed to provide a reader of 3M’s financial statements with a narrative from the perspective of management. 3M’s MD&A is presented in eight sections:

· Overview

· Results of Operations

· Performance by Business Segment

· Performance by Geographic Area

· Critical Accounting Estimates

· New Accounting Pronouncements

· Financial Condition and Liquidity

· Financial Instruments

Forward-looking statements in Item 7 may involve risks and uncertainties that could cause results to differ materially from those projected (refer to the section entitled “Cautionary Note Concerning Factors That MayAffect Future Results” in Item 1 and the risk factors provided in Item 1A for discussion of these risks and uncertainties).

OVERVIEW

3M is a diversified global manufacturer, technology innovator and marketer of a wide variety of products and services. As described in Note 16,  effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions.3M manages its operations in five operating business segments: Industrial; Safety and Graphics; Health Care; Electronics and Energy; and Consumer. From a geographic perspective, any references to EMEA refer to Europe, Middle East and Africa on a combined basis.

Restructuring actions:

During the fourth quarter of 2015, management approved and committed to undertake certain restructuring actions primarily focused on structural overhead, largely in the U.S., and slower-growing markets, with particular emphasis on EMEA and Latin America. This impacted approximately 1,700 positions worldwide and resulted in a fourth-quarter 2015 pre-tax charge of $114 million, $88 million after-tax or $0.14 per diluted share.

Earnings per share attributable to 3M common shareholders – diluted:

The following table provides the increase (decrease) in diluted earnings per share for 2015 compared to 2014, and 2014 compared to 2013.

	Year ended
	December 31,
(Earnings per diluted share)	2015		2014
Same period last year	$	7.49	$	6.72
Increase/(decrease) in earnings per share - diluted, due to:
Operational benefits		0.40		0.66
Restructuring charges		(0.14)		—
Acquisitions and divestitures		(0.02)		—
Foreign exchange impacts		(0.43)		(0.15)
Income tax rate		—		(0.08)
Shares of common stock outstanding		0.28		0.34
Current period	$	7.58	$	7.49

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For total year 2015, net income attributable to 3M was $4.833 billion, or $7.58 per diluted share, compared to $4.956 billion, or $7.49 per diluted share, in 2014, an increase of 1.2 percent on a per diluted share basis. Operational benefits include the combination of selling price increases and raw material cost decreases, partially offset by higher pension/postretirement benefit costs. Restructuring actions (discussed above) resulted in an after-tax charge of 14 cents per diluted share. Acquisition and divestiture impacts primarily relate to the Capital Safety and Polypore Separations Media acquisitions, and the divestitures of the license plate converting business in France and substantially all of the library systems business. Foreign exchange impacts decreased earnings per diluted share by approximately 43 cents year-on-year, driven by average year-on-year changes in foreign exchange rates in the Euro of 17 percent, Yen of 12 percent, and Brazil Real of 30 percent. The income tax rate was largely unchanged year-on-year. Weighted-average diluted shares outstanding in 2015 declined 3.7 percent year-on-year to 637.2 million, which increased earnings per diluted share by approximately 28 cents. Refer to the section entitled “Results of Operations” for further discussion.

For total year 2014, net income attributable to 3M was $4.956 billion, or $7.49 per diluted share, compared to $4.659 billion, or $6.72 per diluted share, in 2013, an increase of 11.5 percent on a per diluted share basis. Operational benefits include a significant benefit from the combination of selling price increases and raw material cost decreases, plus profit leverage on organic volume growth. Foreign exchange impacts decreased earnings per diluted share by approximately 15 cents per diluted share. The income tax rate was 28.9 percent in 2014, up 0.8 percentage points versus 2013, which decreased earnings per diluted share by approximately 8 cents. Weighted-average diluted shares outstanding in 2014 declined 4.6 percent year-on-year to 662.0 million, which increased earnings per diluted share by approximately 34 cents.

Fourth-quarter 2015 sales and operating income results:

Fourth-quarter 2015 net income attributable to 3M was $1.038 billion, or $1.66 per diluted share, compared to $1.179 billion, or $1.81 per diluted share, in the fourth quarter of 2014. Fourth-quarter 2015 sales totaled $7.3 billion, a decrease of 5.4 percent from the fourth quarter of 2014. 3M achieved organic local-currency sales growth (which includes organic volume and selling price impacts) in Health Care, and Consumer, with declines in Industrial, Safety and Graphics, and Electronics and Energy. Organic local-currency sales increased 4.5 percent in Health Care, led by health information systems, food safety, oral care, drug delivery systems, and critical and chronic care.Organic local-currency sales increased 2.7 percent in the Consumer business segment, with positive growth in the construction and home improvement business, stationery and office supplies, and home care, while consumer health care declined. Organic local-currency sales declined 1.8 percent in Industrial, with sales growth in 3M purification and automotive OEM more than offset by declines in industrial adhesives and tapes, abrasives, and advanced materials.Organic local-currency sales declined 2.5 percent in Safety and Graphics, with sales declines in personal safety partially offset by sales growth in roofing granules, and commercial solutions, while traffic safety and security was flat. Electronics and Energy organic local-currency sales growth declined7.7 percent, with decreases in electronic-related sales in both electronics materials solutions, and display materials and systems. Energy-related organic local-currency sales declined in renewable energy, communications markets, and electrical markets. For the Company in total, organic-local currency sales declined 1.1 percent, with organic volume declines of 2.3 percent partially offset by higher selling priceswhich added1.2 percent. Acquisitions added 1.9 percent to sales, which related to the March 2015 acquisition of Ivera Medical Corp. (Ivera), the August 2015 acquisition of Capital Safety Group S.A.R.L. (Capital Safety), and the August 2015 acquisition of Polypore International Inc.’s Separations Media business (Polypore).  Divestitures reduced sales by 0.4 percent, related to the January 2015 sale of the global static business, and the fourth quarter sale of the license converting business in France, along with substantially all of the library systems business. Foreign currency translation reduced sales by 5.8 percent year-on-year.

From a geographic area perspective, fourth-quarter 2015 organic local-currency sales grew1.1 percent in EMEA. Organic local-currency sales declined 0.4 percent in the United States, 0.6 percent in Latin America/Canada, and 2.7 percent in Asia Pacific.In EMEA, Central/East Europe showed solid local-currency sales growth in the quarter, while West Europe was up slightly, and Middle East/Africa declined. Organic local-currency sales in the United States declined, as 3M experienced weak end-market demand in its industrial-related businesses. The consumer-oriented businesses (Health Care and Consumer) continued to deliver positive organic growth. Organic local-currency sales in Latin America/Canada declined. In Latin America, Mexico continued its trend of strong organic growth, increasing 7 percent, while Brazil declined 6 percent. Organic local-currency sales in Asia Pacific declined 2.7 percent. Three of five

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business groups posted positive growth in the Asia Pacific region, led by Health Care and Consumer, while Electronics and Energy declined. Within Asia Pacific, organic local-currency sales declined by 3 percent in both Japan and China/Hong Kong.

Operating income in the fourth quarter of 2015 was 20.5 percent of sales, compared to 21.5 percent of sales in the fourth quarter of 2014, a decrease of 1.0 percentage points. Restructuring charges reduced operating income margins by 1.6 percentage points. In addition, higher pension/postretirement benefit costs reduced margins. These impacts were partially offset by a benefit from the combination of selling price increases and raw material cost decreases.

Year 2015 sales and operating income results:

Sales totaled $30.3 billion, a decrease of 4.9 percent from 2014. From a business segment perspective, organic local-currency sales increased3.7 percent in Health Care, 3.4 percent in Consumer, 2.4 percent in Safety and Graphics, and0.7 percent in Industrial, while sales declined 1.9 percent in Electronics and Energy. From a geographic area perspective, 2015 organic local-currency sales grew2.1 percent in the United States, 1.5 percent in Latin America/Canada, 0.9 percent in Asia Pacific, and 0.8 percent in EMEA. For the Company in total, organic local-currency sales grew 1.3 percent, with higher organic volumes contributing 0.2 percent and selling price increases contributing 1.1 percent. Acquisitions added 0.8 percent to sales, while divestitures reduced sales by 0.2 percent. Foreign currency translation reduced sales by 6.8 percent year-on-year.Refer to the sections entitled “Performance by Business Segment” and “Performance by Geographic Area” for additional detail.

Operating income in 2015 was 22.9 percent of sales, compared to 22.4 percent of sales in 2014, an increase of 0.5 percentage points. These results included a benefit from the combination of selling price increases and raw material cost decreases, partially offset by higher pension/postretirement benefit costs. Refer to the section entitled “Results of Operations” for further discussion.

Year 2014 sales and operating income results:

For total year 2014, net income attributable to 3M was $4.956 billion, or $7.49 per diluted share, compared to $4.659 billion, or $6.72 per diluted share, in 2013, an increase of 11.5 percent on a per diluted share basis. Sales totaled $31.8 billion, an increase of 3.1 percent from 2013. From a business segment perspective, organic local-currency sales grew 5.8 percent in Health Care, 5.4 percent in Safety and Graphics, 5.2 percent in Electronics and Energy, 4.9 percent in Industrial, and 3.9 percent in Consumer. From a geographic area perspective, 2014 organic local-currency sales grew 6.3 percent in Asia Pacific, 4.9 percent in the United States, 4.5 percent in Latin America/Canada, and 3.2 percent in EMEA. For the Company in total, organic local-currency sales grew 4.9 percent, with higher organic volumes contributing 3.9 percent and selling price increases contributing 1.0 percent. Acquisitions added 0.1 percent to sales, driven by the Treo acquisition. Foreign currency translation reduced sales by 1.9 percent year-on-year.

Operating income in 2014 was 22.4 percent of sales, compared to 21.6 percent of sales in 2013, an increase of 0.8 percentage points. These results included a benefit from the combination of selling price increases and raw material cost decreases, lower pension/postretirement benefit costs, and profit leverage on organic volume growth. These factors were partially offset by strategic investments and other factors. Refer to the section entitled “Results of Operations” for further discussion.

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Sales and operating income by business segment:

The following table contains sales and operating income results by business segment for the years ended December 31, 2015 and 2014. In addition to the discussion below, refer to the section entitled “Performance by Business Segment” and “Performance by Geographic Area” later in MD&A for a more detailed discussion of the sales and income results of the Company and its respective business segments (including Corporate and Unallocated). Refer to Note 16 for additional information on business segments, including Elimination of Dual Credit.

													2015 vs 2014
	2015						2014						% change
	Net		% of		Oper.		Net		% of		Oper.		Net		Oper.
(Dollars in millions)	Sales		Total		Income		Sales		Total		Income		Sales		Income
Business Segments
Industrial	$	10,328	34.1	%	$	2,263	$	10,990	34.5	%	$	2,389	(6.0)	%	(5.3)	%
Safety and Graphics		5,515	18.2	%		1,305		5,732	18.0	%		1,296	(3.8)	%	0.7	%
Health Care		5,420	17.9	%		1,724		5,572	17.5	%		1,724	(2.7)	%	—	%
Electronics and Energy		5,220	17.2	%		1,102		5,604	17.6	%		1,115	(6.8)	%	(1.1)	%
Consumer		4,422	14.6	%		1,046		4,523	14.2	%		995	(2.2)	%	5.2	%
Corporate and Unallocated		1	—	%		(355)		4	—	%		(251)	—		—
Elimination of Dual Credit		(632)	(2.0)	%		(139)		(604)	(1.8)	%		(133)	—		—
Total Company	$	30,274	100.0	%	$	6,946	$	31,821	100.0	%	$	7,135	(4.9)	%	(2.6)	%

Sales in 2015decreased 4.9 percent, substantially impacted by foreign currency translation, which reduced sales by 6.8 percent. Sales in U.S. dollars declined in Consumer by 2.2 percent, Health Care by 2.7 percent, Safety and Graphics by3.8 percent, Industrial by 6.0 percent, and Electronics and Energy by 6.8 percent. Total company organic local-currency sales growth (which includes organic volume and selling price impacts) was 1.3 percent, acquisitions added 0.8 percent, divestitures reduced sales by 0.2 percent, and foreign currency translation reduced sales by 6.8 percent. All of 3M’s five business segments posted operating income margins of approximately 21 percent or more in 2015. Worldwide operating income margins for 2015 were 22.9 percent, compared to 22.4 percent for 2014.

Sales in 2014 increased 3.1 percent, led by Health Care at 4.5 percent, Electronics and Energy at 3.9 percent,Industrial at 3.1 percent, Safety and Graphics at 2.7 percent, and Consumer at 2.0 percent. Total company organic local-currency sales growth (which includes organic volume and selling price impacts) was 4.9 percent, acquisitions added 0.1 percent, and foreign currency translation reduced sales by 1.9 percent. All of 3M’s five business segments posted operating income margins of approximately 20 percent or more in 2014. Worldwide operating income margins for 2014 were 22.4 percent, compared to 21.6 percent for 2013.

Financial condition:

3M generated $6.4 billion of operating cash flow in 2015, a decrease of $206 million when compared to 2014. This followed an increase of $809 million when comparing 2014 to 2013. Refer to the section entitled “Financial Condition and Liquidity” later in MD&A for a discussion of items impacting cash flows. In February 2016, 3M’s Board of Directors authorized the repurchase of up to $10 billion of 3M’s outstanding common stock, which replaced the Company’s February2014 repurchase program. This new program has no pre-established end date. In 2015,  2014, and 2013, the Company purchased more than $5 billion of its own stock each year. The Company expects to purchase $4 billion to $6 billion of its own stock in 2016. In February 2016, 3M’s Board of Directors declared a first-quarter 2016 dividend of $1.11 per share, an increase of 8 percent. This marked the 58th consecutive year of dividend increases for 3M. 3M’s debt to total capital ratio (total capital defined as debt plus equity) was 48 percent at December 31, 2015,  34 percent at December 31, 2014, and 25 percent at December 31, 2013.  The Company has an AA- credit rating, with a stable outlook, from Standard& Poor’s and an Aa3 credit rating, with a negative outlook, from Moody’s Investors Service. The Company has significant cash on hand and sufficient additional access to capital markets to meet its funding needs.

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Raw materials:

In 2015, the Company experienced declining costs for most raw material categories and transportation fuel, due largely to the significant price decreases in crude oil. This in turn drove year-on-year cost decreases in many feedstock categories, including petroleum based materials, minerals, metals and wood pulp based products. To date the Company is receiving sufficient quantities of all raw materials to meet its reasonably foreseeable production requirements. It is impossible to predict future shortages of raw materials or the impact any such shortages would have. 3M has avoided disruption to its manufacturing operations through careful management of existing raw material inventories and development and qualification of additional supply sources. 3M manages commodity price risks through negotiated supply contracts, price protection agreements and forward contracts.

Pension and postretirement defined benefit/contribution plans:

On a worldwide basis, 3M’s pension and postretirement plans were 86 percent funded at year-end 2015. The primary U.S. qualified pension plan, which is approximately 69 percent of the worldwide pension obligation, was 91 percent funded and the international pension plans were 90 percent funded. The U.S. non-qualified pension plan is not funded due to tax considerations and other factors. Asset returns in 2015 for the primary U.S. qualified pension plan was 0.7%, as 3M strategically invests in both growth assets and fixed income matching assets to manage its funded status. For the primary U.S. qualified pension plan, the expected long-term rate of return on an annualized basis for 2016 is 7.50%, down 0.25% from 2015. The primary U.S. qualified pension plan year-end 2015 discount rate was 4.47%, up 0.37 percentage points from the year-end 2014 discount rate of 4.10%. The increase in U.S. discount rates resulted in a decreased valuation of the projected benefit obligation (PBO), however the plan’s funded status decreased slightly in 2015 as the growth in the PBO increased at a greater rate than the plan assets returned in 2015. Additional detail and discussion of international plan asset returns and discount rates is provided in Note 11 (Pension and Postretirement Benefit Plans).

3M expects to contribute approximately $100 million to $200 million of cash to its global defined benefit pension and postretirement plans in 2016. The Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2016. 3M expects global defined benefit pension and postretirement expense in 2016 (before settlements, curtailments, special termination benefits and other) to decrease by approximately $320 million pre-tax when compared to 2015. Refer to “Critical Accounting Estimates” within MD&A and Note 11 (Pension and Postretirement Benefit Plans) for additional information concerning 3M’s pension and post-retirement plans.

Beginning on January 1, 2016, with respect to defined contribution plans, the Company reduced its match on employee 401(k) contributions for U.S. employees. Previously, based on the date the employee was hired, up to 6% of eligible compensation was matched in cash at rates of 60%, 75% or 100%. Beginning in 2016, 5% of eligible compensation will be matched at rates of 45%, 60% or 100%, respectively. The reduction in the company’s match is anticipated to reduce 2016 defined contribution pension expense by approximately $35 million.

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RESULTS OF OPERATIONS

Net Sales:

	2015									2014
	U.S.			Intl.			Worldwide			U.S.			Intl.			Worldwide
Net sales (millions)	$	12,049		$	18,225		$	30,274		$	11,714		$	20,107		$	31,821
% of worldwide sales		39.8	%		60.2	%					36.8	%		63.2	%
Components of net sales change:
Volume — organic		1.7	%		(0.5)	%		0.2	%		4.4	%		3.8	%		3.9	%
Price		0.4			1.4			1.1			0.5			1.2			1.0
Organic local-currency sales		2.1			0.9			1.3			4.9			5.0			4.9
Acquisitions		1.2			0.5			0.8			0.2			—			0.1
Divestitures		(0.4)			(0.1)			(0.2)			(0.1)			—			—
Translation		—			(10.7)			(6.8)			—			(3.0)			(1.9)
Total sales change		2.9	%		(9.4)	%		(4.9)	%		5.0	%		2.0	%		3.1	%

In 2015, organic local-currency sales grew 1.3 percent, with increases of 2.1 percent in the United States, 1.5 percent in Latin America/Canada, 0.9 percent in Asia Pacific, and 0.8 percent in EMEA. Organic local-currency sales growth was 1.6 percent across developing markets, and 1.2 percent in developed markets. Worldwide organic local-currency sales grew 3.7 percent in Health Care, 3.4 percent in Consumer, 2.4 percent in Safety and Graphics, and 0.7 percent in Industrial, while sales declined 1.9 percent in Electronics and Energy.Acquisitions added 0.8 percent to worldwide growth, while divestitures reduced worldwide growth by 0.2 percent.Foreign currency translation reduced worldwide sales growth by 6.8 percent.

Worldwide selling prices rose 1.1 percent in 2015. Selling prices continue to be supported by technology innovation, which is a key fundamental strength of the Company, helping to drive unique customer solutions and an increasing flow of new products.

In 2014, organic local-currency sales grew 4.9 percent, with increases of 6.3 percent in Asia Pacific, 4.9 percent in the United States, 4.5 percent in Latin America/Canada, and 3.2 percent in EMEA. Organic local-currency sales grew 5.6 percent across developing markets, and 4.5 percent in developed markets. Worldwide organic local-currency sales grew 5.8 percent in Health Care, 5.4 percent in Safety and Graphics, 5.2 percent in Electronics and Energy, 4.9 percent in Industrial, and 3.9 percent in Consumer. Acquisitions added 0.1 percent to worldwide growth and foreign currency translation reduced worldwide sales growth by 1.9 percent.

Refer to the sections entitled “Performance by Business Segment” and “Performance by Geographic Area” later in MD&A for additional discussion of sales change.

Operating Expenses:

							2015 versus		2014 versus
(Percent of net sales)	2015		2014		2013		2014		2013
Cost of sales	50.9	%	51.7	%	52.1	%	(0.8)	%	(0.4)	%
Selling, general and administrative expenses	20.4		20.3		20.7		0.1		(0.4)
Research, development and related expenses	5.8		5.6		5.6		0.2		—
Operating income	22.9	%	22.4	%	21.6	%	0.5	%	0.8	%

Pension and postretirement expense increased $165 million in 2015 compared to 2014, compared to a decrease of $162 million in 2014 compared to 2013. Year 2015 includes the impact of a first-quarter 2015 Japan pension curtailment gain of $17 million. Pension and postretirement expense is recorded in cost of sales; selling, general and administrative expenses (SG&A); and research, development and related expenses (R&D). Refer to Note 11 (Pension and Postretirement Plans) for components of net periodic benefit cost and the assumptions used to determine net cost.

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The Company is investing in business transformation. Business transformation is defined as changes in processes and internal/external service delivery across 3M to move to more efficient business models to improve operational efficiency and productivity, while allowing 3M to serve customers with greater speed and efficiency. This is enabled by the ongoing multi-year phased implementation of an enterprise resource planning (ERP) system on a worldwide basis.

In the fourth quarter of 2015, as discussed within the Overview section above, 3M incurred restructuring charges impacting operating expenses as follows:

(Millions)	2015
Cost of sales		40
Selling, general and administrative expenses		62
Research, development and related expenses		12
Total	$	114

Cost of Sales:

Cost of sales includes manufacturing, engineering and freight costs.

Cost of sales, measured as a percent of net sales, was 50.9 percent in 2015, a decrease of 0.8 percentage points from 2014. Cost of sales as a percent of sales decreased due to the combination of selling price increases and raw material cost decreases, as selling prices increased net sales by 1.1 percent and raw material cost deflation was favorable by approximately 3.5 percent year-on-year. In addition, higher pension and postretirement costs (of which a portion impacts cost of sales) and fourth quarter 2015 restructuring charges, increased cost of sales as a percent of sales.

Cost of sales, measured as a percent of net sales, was 51.7 percent in 2014, a decrease of 0.4 percentage points from 2013. Cost of sales as a percent of sales decreased due to the combination of selling price increases and raw material cost decreases, as selling prices increased net sales by 1.0 percent and raw material cost deflation was favorable by approximately 1.5 percent year-on-year. In addition, lower pension and postretirement costs (of which a portion impacts cost of sales), along with organic volume leverage, decreased cost of sales as a percent of sales.

Selling, General and Administrative Expenses:

Selling, general and administrative expenses (SG&A) decreased $287 million, or 4.4 percent, in 2015 when compared to 2014. The translation of foreign currencies into U.S. dollars reduced SG&A expense, as evidenced by our foreign currency translation impact which reduced worldwide sales by 6.8 percent. This foreign currency translation benefit was partially offset by higher pension and postretirement expense and fourth quarter 2015 restructuring charges. SG&A, measured as a percent of sales, increased 0.1 percentage points to 20.4 percent in 2015, compared to 20.3 percent of sales in 2014.

Selling, general and administrative expenses (SG&A) increased $85 million, or 1.3 percent, in 2014 when compared to 2013. Year 2014 included strategic investments in business transformation, while lower pension and postretirement expense benefitted SG&A. SG&A, measured as a percent of sales, decreased 0.4 percentage points to 20.3 percent in 2014, compared to 20.7 percent of sales in 2013.

Research, Development and Related Expenses:

Research, development and related expenses (R&D) decreased $7 million, or 0.4 percent, in 2015 compared to 2014. R&D increased 3.2 percent in 2014 compared to 2013. 3M continued to support its key growth initiatives, including more R&D aimed at disruptive innovation, which refers to innovation which has the potential to create new markets and disrupt existing markets. In 2015, like SG&A, R&D spending in U.S. dollars was reduced due to the translation of foreign currencies into U.S. dollars. These 2015 translation benefits were partially offset by higher pension and postretirement expense in 2015 when compared to 2014. In 2014, increases in R&D, when compared to 2013, were partially offset by lower pension and postretirement expense. R&D, measured as a percent of sales, was 5.8 percent in 2015, compared to 5.6 percent in both 2014 and 2013.

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Operating Income:

3M uses operating income as one of its primary business segment performance measurement tools. Refer to the table below for a reconciliation of operating income margins for 2015 versus 2014, and 2014 versus 2013.

Operating income margin:

	Year ended
	December 31,
(Percent of net sales)	2015		2014
Same period last year	22.4	%	21.6	%
Increase/(decrease) in operating income margin, due to:
Selling price and raw material impacts	1.6		1.0
Organic volume growth	—		0.3
Pension and postretirement benefit costs	(0.5)		0.5
Acquisitions and divestitures	(0.2)		(0.1)
Strategic investments	(0.3)		(0.6)
Foreign exchange impacts	—		(0.3)
Restructuring charges	(0.4)		—
Productivity and other	0.3		—
Current period	22.9	%	22.4	%

Operating income margins were 22.9 percent in 2015 compared to 22.4 percent in 2014, an increase of 0.5 percentage points. These results included a significant benefit from the combination of higher selling prices and lower raw material costs, and a benefit from productivity and other items. These benefits were partially offset by higher pension and postretirement benefit costs, 2015 restructuring charges, higher strategic investments, and acquisition and divestiture impacts. Strategic investments include incremental programs around disruptive R&D and business transformation. Acquisition and divestiture impacts primarily relate to the Capital Safety and Polypore Separations Media acquisitions, and the divestitures of substantially all of the library systems business, along with the license plate converting business in France.

Operating income margins were 22.4 percent in 2014 compared to 21.6 percent in 2013, an increase of 0.8 percentage points. These results included a significant benefit from the combination of higher selling prices and lower raw material costs. In addition, lower year-on-year pension and postretirement benefit costs and profit leverage on organic volume growth provided benefits. Items that reduced operating income margins included strategic investments, which included investments in disruptive R&D, business transformation, the supply chain center of expertise in Europe, and portfolio management actions. The Company invested $90 million in 2014 in portfolio management actions to position 3M for greater success. Foreign currency effects and acquisition impacts (Treo) reduced operating income margins.

Interest Expense and Income:

(Millions)	2015		2014		2013
Interest expense	$	149	$	142	$	145
Interest income		(26)		(33)		(41)
Total	$	123	$	109	$	104

Interest Expense:  Interest expense increased slightly in 2015 compared to 2014, despite significantly higher debt levels, helped by lower average interest rates. Interest expensedecreased in 2014 compared to 2013, again despite higher debt levels, primarily due to lower U.S. borrowing costs as debt maturities were replaced with lower cost financing from commercial paper and lower interest rates on new debt issuances.

Capitalized interest related to property, plant and equipment construction in progress is recorded as a reduction to interest expense. The amounts shown in the table above for interest expense are net of capitalized interest amounts of $13 million, $15 million, and $21 million, in 2015, 2014 and 2013, respectively.

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Interest Income:Interest income in 2015 was lower when compared to 2014 due to lower average cash/marketable securities balances. Interest income in 2014 was lower when compared to 2013 due to lower cash balances.

Provision for Income Taxes:

(Percent of pre-tax income)	2015		2014		2013
Effective tax rate	29.1	%	28.9	%	28.1	%

The effective tax rate for 2015 was 29.1 percent, compared to 28.9 percent in 2014, an increase of 0.2 percentage points.  The effective tax rate for 2014 was 28.9 percent, compared to 28.1 percent in 2013, an increase of 0.8 percentage points.  The changes in the rates between years are impacted by many factors, as described further in Note 8.

The Company currently expects that its effective tax rate for 2016 will be approximately 29.5 to 30.5 percent. The rate can vary from quarter to quarter due to discrete items, such as the settlement of income tax audits and changes in tax laws, as well as recurring factors, such as the geographic mix of income before taxes.

Refer to Note 8 for further discussion of income taxes.

Net Income Attributable to Noncontrolling Interest:

(Millions)	2015		2014		2013
Net income attributable to noncontrolling interest	$	8	$	42	$	62

Net income attributable to noncontrolling interest represents the elimination of the income or loss attributable to non-3M ownership interests in 3M consolidated entities. The changes in noncontrolling interest amounts have largely related to Sumitomo 3M Limited (Japan), which was 3M’s most significant consolidated entity with non-3M ownership interests. As discussed in Note 6, on September1, 2014, 3M purchased the remaining 25 percent ownership in Sumitomo 3M Limited, bringing 3M’s ownership to 100 percent. Thus, effective September1, 2014, net income attributable to noncontrolling interest was significantly reduced. The primary remaining noncontrolling interest relates to 3M India Limited, of which 3M’s effective ownership is 75 percent.

Currency Effects:

3M estimates that year-on-year currency effects, including hedging impacts, decreased pre-tax incomeby approximately $390 million and $100 million in 2015 and 2014, respectively. These estimates include the effect of translating profits from local currencies into U.S. dollars; the impact of currency fluctuations on the transfer of goods between 3M operations in the United States and abroad; and transaction gains and losses, including derivative instruments designed to reduce foreign currency exchange rate risks and the negative impact of swapping Venezuelan bolivars into U.S. dollars. 3M estimates that year-on-year derivative and other transaction gains and losses increased pre-tax income by approximately $180 million and $10 million in 2015 and 2014, respectively. Refer to Note 12 in the Consolidated Financial Statements for additional information concerning 3M’s hedging activities.

PERFORMANCE BY BUSINESS SEGMENT

Disclosures relating to 3M’s business segments are provided in Item 1, Business Segments. Financial information and other disclosures are provided in the Notes to the Consolidated Financial Statements.  As described in Note 16, effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions.3M manages its operations in five business segments. The reportable segments are Industrial; Safety and Graphics; Electronics and Energy; Health Care; and Consumer.

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Corporate and Unallocated:

In addition to these five business segments, 3M assigns certain costs to “Corporate and Unallocated,” which is presented separately in the preceding business segments table and in Note 16. Corporate and Unallocated includes a variety of miscellaneous items, such as corporate investment gains and losses, certain derivative gains and losses, certain insurance-related gains and losses, certain litigation and environmental expenses, corporate restructuring charges and certain under- or over-absorbed costs (e.g. pension, stock-based compensation) that the Company determines not to allocate directly to its business segments. Because this category includes a variety of miscellaneous items, it is subject to fluctuation on a quarterly and annual basis.

Corporate and Unallocated operating expenses increased by $104 million in 2015 when compared to 2014. This increase was driven by higher pension and postretirement benefit expenses, which increased in total by $165 million. Of this increase, $153 million was allocated to Corporate and Unallocated. Increases were also driven by fourth quarter 2015 restructuring charges of $37 million, as indicated in the below table. Items which partially offset these increases within Corporate and Unallocated included higher administrative and R&D cost absorption by the five business segments, resulting in less under-absorbed expense being allocated to Corporate.

Corporate and Unallocated operating expenses decreased by $70 million in 2014 when compared to 2013. This decrease was driven by lower pension and postretirement benefit expenses, which declined year-on-year by $162 million. Of this reduction, $116 million was allocated to Corporate and Unallocated. This was partially offset by higher Corporate and Unallocated expenses related to year-on-year increases in annual incentive plan expenses and legal accruals.

Restructuring Pre-Tax Charge by Business Segment:

(Millions)	2015
Industrial		42
Safety and Graphics		11
Health Care		9
Electronics and Energy		12
Consumer		3
Corporate and Unallocated		37
Total	$	114

Operating Business Segments:

Each of 3M’s business segments incurred restructuring charges in the fourth quarter of 2015, as indicated in the preceding table. In 2014, each business segment absorbed additional cost related to incremental investments related to business transformation, enabled by 3M’s global ERP implementation, which impacted each of the five business segments 2014 annual operating income margins by approximately 0.2 percentage points when compared to 2013.

Information related to 3M’s business segments is presented in the tables that follow. Organic local-currency sales include both organic volume impacts plus selling price impacts. Acquisition impacts, if any, are measured separately for the first twelve months of the acquisition. The divestiture impacts, if any, foreign currency translation impacts and total sales change are also provided for each business segment. Any references to EMEA relate to Europe, Middle East and Africa on a combined basis.

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The following discusses total year results for 2015 compared to 2014, and also discusses 2014 compared to 2013, for each business segment.

Industrial Business (34.1% of consolidated sales):

	2015			2014			2013
Sales (millions)	$	10,328		$	10,990		$	10,657
Sales change analysis:
Organic local currency		0.7	%		4.9	%		4.6	%
Acquisitions		0.6			—			3.6
Translation		(7.3)			(1.8)			(1.7)
Total sales change		(6.0)	%		3.1	%		6.5	%
Operating income (millions)	$	2,263		$	2,389		$	2,307
Percent change		(5.3)	%		3.6	%		2.8	%
Percent of sales		21.9	%		21.7	%		21.6	%

The Industrial segment serves a broad range of markets, such as automotive original equipment manufacturer (OEM) and automotive aftermarket (auto body shops and retail), electronics, appliance, paper and printing, packaging, food and beverage, and construction. Industrial products include tapes, a wide variety of coated, non-woven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, 3M purification (filtration products), closure systems for personal hygiene products, acoustic systems products, and components and products that are used in the manufacture, repair and maintenance of automotive, marine, aircraft and specialty vehicles.3M is also a leading global supplier of precision grinding technology serving customers in the area of hard-to-grind precision applications in industrial, automotive, aircraft and cutting tools.3M develops and produces advanced technical ceramics for demanding applications in the automotive, oil and gas, solar, industrial, electronics and defense industries.

Year 2015 results:

Sales in Industrial totaled $10.3 billion, down 6.0 percent in U.S. dollars. Organic local-currency sales increased 0.7 percent, acquisitions added 0.6 percent, and foreign currency translation reduced sales by 7.3 percent.

On an organic local-currency sales basis:

· Sales growth was led by 3M purification, automotive OEM, and aerospace and commercial transportation, while both automotive aftermarket,and industrial adhesives and tapes sales increased slightly.  

· Sales in advanced materials declined, primarily due to weakness in the oil and gas market.Sales in abrasive systems also declined.

· Geographically, sales increased 4 percent in Latin America/Canada, 1 percent in Asia Pacific, and were flat in both EMEA and the United States.

Acquisitions:

· Acquisition sales growth related to the late August 2015 acquisition of Polypore’s Separations Media business.

· This business is a provider of microporous membranes and modules for filtration in the life sciences, industrial, and specialty segments. This acquisition enhances 3M’s core filtration platform and will help generate new growth opportunities across the company.

Operating income:

· Operating income margins increased by 0.2 percentage points to 21.9 percent, helped by the combination of lower raw material costs and selective selling price increases.

· Operating income margins were negatively impacted by 0.4 percentage points due to the $42 million restructuring charge, plus an additional 0.3 percentage points penalty due to the Polypore Separations Media acquisition.

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Year 2014 results:

Sales in Industrial totaled $11.0 billion, up 3.1 percent in U.S. dollars. Organic local-currency sales increased 4.9 percent, and foreign currency translation reduced sales by 1.8 percent.

On an organic local-currency sales basis:

· Sales growth was positive across all businesses, led by aerospace and commercial transportation, automotive OEM, 3M purification, advanced materials, and abrasive systems.

· Geographically, organic local-currency sales increased 6 percent in the United States, 5 percent in Asia Pacific, and 3 percent in both EMEA and Latin America/Canada.

Operating income:

· Operating income was $2.4 billion in 2014, an increase of 3.6 percent.

· Operating income margins increased by 0.1 percentage points to 21.7 percent.

· Operating income margins improved due to sales volume leverage, plus the combination of selling price increases and raw material cost decreases, partially offset by incremental investments related to business transformation, enabled by 3M’s global ERP implementation.

Safety and Graphics Business (18.2% of consolidated sales):

	2015			2014			2013
Sales (millions)	$	5,515		$	5,732		$	5,584
Sales change analysis:
Organic local currency		2.4	%		5.4	%		4.1	%
Acquisitions		2.6			—			1.3
Divestitures		(0.4)			—			—
Translation		(8.4)			(2.7)			(2.1)
Total sales change		(3.8)	%		2.7	%		3.3	%
Operating income (millions)	$	1,305		$	1,296		$	1,227
Percent change		0.7	%		5.6	%		1.4	%
Percent of sales		23.7	%		22.6	%		22.0	%

The Safety and Graphics segment serves a broad range of markets that increase the safety, security and productivity of people, facilities and systems. Major product offerings include personal protection products; traffic safety and security products, including border and civil security solutions; commercial solutions, including commercial graphics sheeting and systems, architectural design solutions for surfaces, and cleaning and protection products for commercial establishments; roofing granules for asphalt shingles; plus fall protection equipment.

Year 2015 results:

Sales in Safety and Graphics totaled $5.5 billion, down3.8 percent in U.S. dollars. Organic local-currency sales increased 2.4 percent, and foreign currency translation reduced sales by 8.4 percent. Acquisitions added 2.6 percent, while divestitures reduced sales by 0.4 percent.

On an organic local-currency sales basis:

· Sales growth was led by roofing granules, commercial solutions, and personal safety, while sales were flat in traffic safety and security.

· Sales increased 6 percent in Asia Pacific, 3 percent in the United States, and 2 percent in EMEA, while sales declined 1 percent in Latin America/Canada.

Acquisitions and divestitures:

· Acquisition sales growth reflects the acquisition of Capital Safety in early August 2015. Capital Safety is a leading global provider of fall protection equipment.

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· In the fourth quarter of 2015, 3M divested its license plate converting business in France and substantially all of its library systems business as discussed in Note 2.

Operating income:

· Operating income in 2015 totaled $1.3 billion, up 0.7 percent.

· Operating income margins were 23.7 percent of sales, compared to 22.6 percent in 2014.  

· Operating income margin improvements were driven by higher selling prices and lower raw material costs, along with productivity.

· Operating income margins penalty from acquisitions was partially offset by a benefit from divestitures, which resulted in a net margin penalty of 0.2 percentage points.

Year 2014 results:

Sales in Safety and Graphics totaled $5.7 billion, up 2.7 percent in U.S. dollars. Organic local-currency sales increased 5.4 percent, and foreign currency translation reduced sales by 2.7 percent.

On an organic local-currency sales basis:

· Sales growth was led by personal safety. 3M also saw positive organic local-currency sales growth in commercial solutions, and traffic safety and security.

· Sales in the roofing granules business declined year-on-year.

· Organic local-currency sales increased 6 percent in EMEA, and increased 5 percent in the United States, Asia Pacific, and Latin America/Canada.

Operating income:

· Operating income in 2014 totaled $1.3 billion, up 5.6 percent.

· Operating income margins were 22.6 percent of sales, compared to 22.0 percent in 2013.

· Operating income margins benefited from organic volume leverage plus selling price increases, partially offset by incremental investments related to business transformation, enabled by 3M’s global ERP implementation, plus certain portfolio management actions.

Health Care Business (17.9% of consolidated sales):

	2015			2014			2013
Sales (millions)	$	5,420		$	5,572		$	5,334
Sales change analysis:
Organic local currency		3.7	%		5.8	%		5.0	%
Acquisitions		0.8			0.4			0.1
Translation		(7.2)			(1.7)			(1.3)
Total sales change		(2.7)	%		4.5	%		3.8	%
Operating income (millions)	$	1,724		$	1,724		$	1,672
Percent change		—	%		3.1	%		1.9	%
Percent of sales		31.8	%		30.9	%		31.3	%

The Health Care segment serves markets that include medical clinics and hospitals, pharmaceuticals, dental and orthodontic practitioners, health information systems, and food manufacturing and testing. Products and services provided to these and other markets include medical and surgical supplies, skin health and infection prevention products, inhalation and transdermal drug delivery systems, oral care solutions (dental and orthodontic products), health information systems, and food safety products.Effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions.

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Year 2015 results:

Health Care sales totaled $5.4 billion, a decrease of 2.7 percent in U.S. dollars. Organic local-currency sales increased 3.7 percent, acquisitions added 0.8 percent, and foreign currency translation reduced sales by 7.2 percent.

On an organic local-currency sales basis:

· Sales growth was broad-based across much of the Health Care portfolio, including food safety, health information systems, critical and chronic care, oral care solutions, and infection prevention.

· Sales declined in drug delivery systems.

· On a geographic basis, sales increased 8 percent in Asia Pacific, 6 percent in Latin America/Canada, 4 percent in the United States, and 1 percent in EMEA.

· In developing markets, Health Care organic local-currency sales grew 8 percent.

Acquisitions:

· Acquisitionsales growth related to the March 2015 purchase of Ivera Medical Corp. Ivera is a manufacturer of health care products that disinfect and protect devices used for access into a patient’s bloodstream. In addition, Treo Solutions LLC, acquired in April 2014, provided a year-on-year benefit (discussed further in Year 2014 results below).

Operating income:

· Operating income was flat in dollars at $1.7 billion.  

· Operating income margins were 31.8 percent in 2015, compared to 30.9 percent in 2014,  helped by portfolio management actions that are contributing to higher productivity and margins.

· Acquisition impacts reduced operating income margins by 0.2 percentage points.

In September 2015, 3M announced that it would explore strategic alternatives for its Health Information Systems Division (HIS), which included spinning-off, selling, or retaining the business. In February 2016, following an in-depth exploration of strategic alternatives, the Company announced that it made the decision to retain and further invest in HIS.

Year 2014 results:

Health Care sales totaled $5.6 billion, an increase of 4.5 percent in U.S. dollars. Organic local-currency sales increased 5.8 percent, acquisitions added 0.4 percent, and foreign currency translation reduced sales by 1.7 percent.

On an organic local-currency sales basis:

· Sales grew in all businesses, with the strongest growth in health information systems, drug delivery systems, food safety, critical and chronic care, and infection prevention.

· On a geographic basis, organic local-currency sales increased 9 percent in Latin America/Canada, 8 percent in Asia Pacific, 6 percent in the United States, and 3 percent in EMEA.

· In developing markets, Health Care organic local-currency sales grew 12 percent.

Acquisitions:

· Acquisition sales growth related to the April 2014 purchase of Treo Solutions LLC. Treo is a provider of data analytics and business intelligence to healthcare payers and providers.

Operating income:

· Operating income increased 3.1 percent to $1.7 billion.

· Operating income margins were 30.9 percent in 2014, compared to 31.3 percent in 2013, with acquisition impacts reducing operating income margins by 0.3 percentage points.

· The gain from sale of a non-strategic equity method investment benefited total year 2013 operating income margins by 0.3 percentage points.

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Electronics and Energy Business (17.2% of consolidated sales):

	2015			2014			2013
Sales (millions)	$	5,220		$	5,604		$	5,393
Sales change analysis:
Organic local currency		(1.9)	%		5.2	%		—	%
Divestitures		(0.8)			—			—
Translation		(4.1)			(1.3)			(1.2)
Total sales change		(6.8)	%		3.9	%		(1.2)	%
Operating income (millions)	$	1,102		$	1,115		$	954
Percent change		(1.1)	%		16.8	%		(7.0)	%
Percent of sales		21.1	%		19.9	%		17.7	%

The Electronics and Energy segment serves customers in electronics and energy markets, including solutions that improve the dependability, cost-effectiveness, and performance of electronic devices; electrical products, including infrastructure protection; telecommunications networks, and power generation and distribution. This segment’s electronics solutions include film solutions for the electronic display industry; packaging and interconnection devices; high performance fluids and abrasives; high-temperature and display tapes; flexible circuits, which use electronic packaging and interconnection technology; and touch systems products, which includes touch screens, touch monitors, and touch sensor components. This segment’s energy solutions include pressure sensitive tapes and resins; electrical insulation; infrastructure products that provide both protection and detection solutions; a wide array of fiber-optic and copper-based telecommunications systems; and renewable energy component solutions for the solar and wind power industries.

The display materials and systems business provides films that serve numerous market segments of the electronic display industry. 3M provides distinct products for five market segments, including products for: 1) LCD computer monitors 2) LCD televisions 3) handheld devices such as cellular phones and tablets 4) notebook PCs and 5) automotive displays. The display materials and systems business includes a number of different products that are protected by various patents and groups of patents. These patents provide varying levels of exclusivity to 3M for a number of such products. As some of 3M’s multi-layer optical film patents expired at the end of 2013 and will expire over several years thereafter, 3M will likely see more competition in these products. 3M continues to innovate in the area of optical films and files patents on its new technology and products. 3M’s proprietary manufacturing technology and know-how also provide a competitive advantage to 3M independent of its patents.

Year 2015 results:

Electronics and Energy sales totaled $5.2 billion, down6.8 percent in U.S. dollars. Organic local-currency sales declined1.9 percent, divestitures reduced sales by 0.8 percent, and foreign currency translation reduced sales by 4.1 percent.

On an organic local-currency sales basis:

· Sales decreased approximately 1 percent in 3M’s electronics-related businesses,with growth in electronics materials solutions more than offset by a decline in display materials and systems, as 3M experienced softer conditions in the electronics markets.

· Sales decreased approximately 4 percent in 3M’s energy-related businesses, as telecommunications, electrical markets, and renewable energy all declined.

· On a geographic basis,sales increased 1 percent in Europe, were flat in the United States, and declined 3 percent in both Latin America/Canada and Asia Pacific.

Divestitures:

· 3M completed the sale of its static control business in January 2015 (discussed in Note 2).

Operating income:

· Operating income decreased 1.1 percent to $1.1 billion in 2015.  

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· Operating income margins were 21.1 percent compared to 19.9 percent in 2014, helped by prior year portfolio management actions that are contributing to higher productivity.

· Portfolio management actions in 2015 related to renewable energy, plus fourth quarter 2015 restructuring charges, which combined reduced operating income margins by 0.8 percentage points.

Year 2014 results:

Electronics and Energy sales totaled $5.6 billion, up 3.9 percent in U.S. dollars. Organic local-currency sales increased 5.2 percent, and foreign currency translation reduced sales by 1.3 percent.

On an organic local-currency sales basis:

· Sales increased approximately 8 percent in 3M’s electronics-related businesses, with growth led by display materials and systems.

· In 3M’s energy-related businesses, organic local-currency sales increased approximately 1 percent, with growth in electrical markets and telecommunications, partially offset by reductions in renewable energy.

· On a geographic basis, organic local-currency sales increased 8 percent in Latin America/Canada, 7 percent in Asia Pacific, and 1 percent in EMEA, while sales in the United States were flat.

Operating income:

· Operating income increased 16.8 percent to $1.1 billion in 2014.

· Operating income margins were 19.9 percent compared to 17.7 percent in 2013, helped by sales volume leverage.

· In addition, prior portfolio management actions enhanced 3M’s relevance with customers and generated operational efficiencies, which also contributed to the operating income margin improvement in 2014.

Consumer Business (14.6% of consolidated sales):

	2015			2014			2013
Sales (millions)	$	4,422		$	4,523		$	4,435
Sales change analysis:
Organic local currency		3.4	%		3.9	%		3.0	%
Divestitures		—			(0.1)			(0.1)
Translation		(5.6)			(1.8)			(1.8)
Total sales change		(2.2)	%		2.0	%		1.1	%
Operating income (millions)	$	1,046		$	995		$	945
Percent change		5.2	%		5.3	%		0.2	%
Percent of sales		23.7	%		22.0	%		21.3	%

The Consumer segment serves markets that include consumer retail, office retail, office business to business, home improvement, drug and pharmacy retail, and other markets. Products in this segment include office supply products, stationery products, construction and home improvement products (do-it-yourself), home care products, protective material products, certain consumer retail personal safety products, and consumer health care products.

Year 2015 results:

Consumer sales totaled $4.4 billion, down 2.2 percent in U.S. dollars. Organic local-currency sales increased 3.4 percent, and foreign currency translation reduced sales by 5.6 percent.

On an organic local-currency sales basis:

· Sales growth was led by construction and home improvement, stationery and office supplies, and home care. 3M also posted positive growth in its consumer health care business.

· On a geographic basis, organic local-currency sales increased 5 percent in the United States and3 percent in Asia Pacific, while sales in both EMEA and Latin America/Canada were flat.

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· In developing markets, sales growth was 3 percent.

Operating income:

· Consumer operating income was $1.0 billion, up 5.2 percent from 2014.  

· Operating income margins were 23.7 percent, up from 22.0 percent in 2014.  

· The combination of strong organic growth and productivity continued to drive efficiencies across this business.

Year 2014 results:

Consumer sales totaled $4.5 billion, up 2.0 percent in U.S. dollars. Organic local-currency sales increased 3.9 percent, divestitures reduced sales by 0.1 percent, and foreign currency translation reduced sales by 1.8 percent.

On an organic local-currency sales basis:

· Sales growth was led by construction and home improvement. 3M also posted positive growth in the consumer health care and home care businesses. Sales in the stationery and office supplies business were flat.

· On a geographic basis, organic local-currency sales increased 6 percent in Asia Pacific, 4 percent in the United States, 3 percent in Latin America/Canada, and 1 percent in EMEA.

· In developing markets, sales growth was 6 percent.

Operating income:

· Consumer operating income was $1.0 billion, up 5.3 percent from 2013.  

· Operating income margins were 22.0 percent, up from 21.3 percent in 2013.

· The combination of strong organic growth, productivity, and portfolio prioritization continued to drive efficiencies across this business.

PERFORMANCE BY GEOGRAPHIC AREA

While 3M manages its businesses globally and believes its business segment results are the most relevant measure of performance, the Company also utilizes geographic area data as a secondary performance measure. Export sales are generally reported within the geographic area where the final sales to 3M customers are made. A portion of the products or components sold by 3M’s operations to its customers are exported by these customers to different geographic areas. As customers move their operations from one geographic area to another, 3M’s results will follow. Thus, net sales in a particular geographic area are not indicative of end-user consumption in that geographic area. Financial information related to 3M operations in various geographic areas is provided in Note 17.

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A summary of key information and discussion related to 3M’s geographic areas follow:

	2015
							Europe,			Latin
	United			Asia			Middle East			America/			Other
	States			Pacific			& Africa			Canada			Unallocated		Worldwide
Net sales (millions)	$	12,049		$	9,041		$	6,228		$	2,982		$	(26)	$	30,274
% of worldwide sales		39.8	%		29.9	%		20.5	%		9.8	%		—		100.0	%
Components of net sales change:
Volume — organic		1.7	%		0.9	%		(1.0)	%		(3.1)	%		—		0.2	%
Price		0.4			—			1.8			4.6			—		1.1
Organic local-currency sales		2.1			0.9			0.8			1.5			—		1.3
Acquisitions		1.2			0.4			0.7			0.7			—		0.8
Divestitures		(0.4)			(0.1)			(0.1)			(0.2)			—		(0.2)
Translation		—			(5.2)			(14.9)			(16.9)			—		(6.8)
Total sales change		2.9	%		(4.0)	%		(13.5)	%		(14.9)	%		—		(4.9)	%
Operating income (millions)	$	2,647		$	2,580		$	1,017		$	706		$	(4)	$	6,946
Percent change		4.2	%		3.8	%		(17.5)	%		(18.5)	%		—		(2.6)	%

For total year 2015, as shown in the preceding table, sales declined4.9 percent, with organic volume increases of 0.2 percent and selling price increases of 1.1 percent. Acquisitions added 0.8 percent, while divestitures reduced sales by 0.2 percent. Foreign currency translation reduced sales by 6.8 percent. Organic local-currency sales increased, 2.1 percent in the United States, 1.5 percent in Latin America/Canada, 0.9 percent in Asia Pacific, and 0.8 percent in EMEA. For 2015, international operations represented 60.2 percent of 3M’s sales.

	2014
							Europe,			Latin
	United			Asia			Middle East			America/			Other
	States			Pacific			& Africa			Canada			Unallocated		Worldwide
Net sales (millions)	$	11,714		$	9,418		$	7,198		$	3,504		$	(13)	$	31,821
% of worldwide sales		36.8	%		29.6	%		22.6	%		11.0	%		—		100.0	%
Components of net sales change:
Volume — organic		4.4	%		6.2	%		2.1	%		0.2	%		—		3.9	%
Price		0.5			0.1			1.1			4.3			—		1.0
Organic local-currency sales		4.9			6.3			3.2			4.5			—		4.9
Acquisitions		0.2			—			—			—			—		0.1
Divestitures		(0.1)			—			—			—			—		—
Translation		—			(2.2)			(1.6)			(7.5)			—		(1.9)
Total sales change		5.0	%		4.1	%		1.6	%		(3.0)	%		—		3.1	%
Operating income (millions)	$	2,540		$	2,487		$	1,234		$	867		$	7	$	7,135
Percent change		14.9	%		4.2	%		5.7	%		(4.5)	%		—		7.0	%

For total year 2014, as shown in the preceding table, sales rose 3.1 percent, with organic volume increases of 3.9 percent and selling price increases of 1.0 percent. Acquisitions added 0.1 percent, while foreign currency translation reduced sales by 1.9 percent. Organic local-currency sales increased 6.3 percent in AsiaPacific,4.9 percent in the United States,4.5 percent in Latin America/Canada, and 3.2 percent in EMEA. For 2014, international operations represented 63.2 percent of 3M’s sales.

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Geographic Area Supplemental Information

										Property, Plant and
										Equipment - net
	Employees as of December 31,			Capital Spending						as of December 31,
(Millions, except Employees)	2015	2014	2013	2015		2014		2013		2015		2014
United States	35,973	35,581	34,719	$	936	$	909	$	941	$	4,838	$	4,619
Asia Pacific	17,642	17,854	18,417		172		184		284		1,647		1,798
Europe, Middle East and Africa	20,563	20,506	20,504		249		288		290		1,531		1,502
Latin America and Canada	15,268	15,859	15,027		104		112		150		499		570
Total Company	89,446	89,800	88,667	$	1,461	$	1,493	$	1,665	$	8,515	$	8,489

Employment:

Employment decreased by 354 positions in 2015 and increased by 1,133 positions in 2014.  The primary factor that decreased employment in 2015 related to fourth-quarter 2015 restructuring actions that impacted approximately 1,700 positions worldwide. The 2015 acquisitions of Ivera Medical Corp., Polypore International Inc.’s Separations Media business and Capital Safety Group S.A.R.L. increased 2015 headcount by approximately 2,000 positions. The primary factors that increased employment in 2014 was additions in developing economies to support growth, plus additions related to the Treo Solutions LLC acquisition in 2014.

Capital Spending/Net Property, Plant and Equipment:

Investments in property, plant and equipment enable growth across many diverse markets, helping to meet product demand and increasing manufacturing efficiency. 3M’s capital spending by geography has been led by the United States (64% of spending in 2015), followed by Europe, Middle East and Africa, Asia Pacific, and Latin America/Canada. 3M is continuing to increase its manufacturing and sourcing capability, particularly in developing economies, in order to more closely align its product capability with its sales in major geographic areas. 3M will continue to make investments in critical developing markets, such as Brazil, China, Mexico, Panama, Poland, Southeast Asia, and Turkey. Capital spending is discussed in more detail later in MD&A in the section entitled “Cash Flows from Investing Activities.”

CRITICAL ACCOUNTING ESTIMATES

Information regarding significant accounting policies is included in Note 1. As stated in Note 1, the preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Management bases its estimates on historical experience and on various assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.

The Company believes its most critical accounting estimates relate to legal proceedings, the Company’s pension and postretirement obligations, asset impairments and income taxes. Senior management has discussed the development, selection and disclosure of its critical accounting estimates with the Audit Committee of 3M’s Board of Directors.

Legal Proceedings:

The categories of claims for which the Company has a probable and estimable liability, the amount of its liability accruals, and the estimates of its related insurance receivables are critical accounting estimates related to legal proceedings. Please refer to the section entitled “Process for Disclosure and Recording of Liabilities and Insurance Receivables Related to Legal Proceedings” (contained in “Legal Proceedings” in Note 14) for additional information about such estimates.

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Pension and Postretirement Obligations:

3M has various company-sponsored retirement plans covering substantially all U.S. employees and many employees outside the United States. The primary U.S. defined-benefit pension plan was closed to new participants effective January 1, 2009. The Company accounts for its defined benefit pension and postretirement health care and life insurance benefit plans in accordance with Accounting Standard Codification (ASC) 715, Compensation — Retirement Benefits, in measuring plan assets and benefit obligations and in determining the amount of net periodic benefit cost. ASC 715 requires employers to recognize the underfunded or overfunded status of a defined benefit pension or postretirement plan as an asset or liability in its statement of financial position and recognize changes in the funded status in the year in which the changes occur through accumulated other comprehensive income, which is a component of stockholders’ equity. While the company believes the valuation methods used to determine the fair value of plan assets are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. See Note 11 for additional discussion of actuarial assumptions used in determining pension and postretirement health care liabilities and expenses.

Pension benefits associated with these plans are generally based primarily on each participant’s years of service, compensation, and age at retirement or termination. The benefit obligation represents the present value of the benefits that employees are entitled to in the future for services already rendered as of the measurement date. The Company measures the present value of these future benefits by projecting benefit payment cash flows for each future period and discounting these cash flows back to the December 31 measurement date, using the yields of a portfolio of high quality, fixed-income debt instruments that would produce cash flows sufficient in timing and amount to settle projected future benefits. Historically, the single aggregated discount rate used for each plan’s benefit obligation was also used for the calculation of all net periodic benefit costs, including the measurement of the service and interest costs. Beginning in 2016, 3M changed the method used to estimate the service and interest cost components of the net periodic pension and other postretirement benefit costs. The new method measures service cost and interest cost separately using the spot yield curve approach applied to each corresponding obligation. Service costs are determined based on duration-specific spot rates applied to the service cost cash flows. The interest cost calculation is determined by applying duration-specific spot rates to the year-by-year projected benefit payments. The spot yield curve approach does not affect the measurement of the total benefit obligations as the change in service and interest costs offset in the actuarial gains and losses recorded in other comprehensive income. The Company changed to the new method to provide a more precise measure of service and interest costs by improving the correlation between the projected benefit cash flows and the discrete spot yield curve rates. The Company accounted for this change as a change in estimate prospectively beginning in the first quarter of 2016. As a result of the change to the spot yield curve approach, 2016 defined benefit pension and postretirement net periodic benefit cost is expected to decrease by $180 million. Including this $180 million, 3M expects global defined benefit pension and postretirement expense in 2016 (before settlements, curtailments, special termination benefits and other) to decrease by approximately $320 million pre-tax when compared to 2015.

Using this methodology, the Company determined discount rates for its plans as follow:

	U.S. Qualified Pension		International Pension (weighted average)		U.S. Postretirement Medical
December 31, 2014 Liability and 2015 Net Periodic Benefit Cost:
Single discount rate	4.10	%	3.11	%	4.07	%
December 31, 2015 Liability:
Benefit obligation	4.47	%	3.12	%	4.32	%
2016 Net Periodic Benefit Cost Components:
Service cost	4.72	%	2.84	%	4.60	%
Interest cost	3.77	%	2.72	%	3.44	%

Another significant element in determining the Company’s pension expense in accordance with ASC 715 is the expected return on plan assets, which is based on historical results for similar allocations among asset classes. For the primary U.S. qualified pension plan, the expected long-term rate of return on an annualized basis for 2016 is 7.50%, 0.25% lower than 2015. Refer to Note 11 for information on how the 2015 rate was determined. Return on assets assumptions for

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international pension and other post-retirement benefit plans are calculated on a plan-by-plan basis using plan asset allocations and expected long-term rate of return assumptions. The weighted average expected return for the international pension plan is 5.77% for 2016, compared to 5.90% for 2015.

For the year ended December 31, 2015, the Company recognized total consolidated defined benefit pre-tax pension and postretirement expense (after settlements, curtailments, special termination benefits and other) of $556 million, up from $391 million in 2014. Defined benefit pension and postretirement expense (before settlements, curtailments, special termination benefits and other) is anticipated to decrease to approximately $236 million in 2016, a decrease of $320 million compared to 2015.

The table below summarizes the impact on 2016 pension expense for the U.S. and international pension plans of a 0.25 percentage point increase/decrease in the expected long-term rate of return on plan assets and discount rate assumptions used to measure plan liabilities and 2016 net periodic benefit cost. The table assumes all other factors are held constant, including the slope of the discount rate yield curves.

	Increase (Decrease) in Net Periodic Benefit Cost
	Discount Rate				Expected Return on Assets
(Millions)	-0.25%		+0.25%		-0.25%		+0.25%
U.S. pension plans	$	30	$	(29)	$	35	$	(35)
International pension plans		22		(20)		14		(14)

Asset Impairments:

As of December 31, 2015, net property, plant and equipment totaled $8.5 billion and net identifiable intangible assets totaled $2.6 billion. Management makes estimates and assumptions in preparing the consolidated financial statements for which actual results will emerge over long periods of time. This includes the recoverability of long-lived assets employed in the business, including assets of acquired businesses. These estimates and assumptions are closely monitored by management and periodically adjusted as circumstances warrant. For instance, expected asset lives may be shortened or an impairment recorded based on a change in the expected use of the asset or performance of the related asset group.

3M goodwill totaled approximately $9.2 billion as of December 31, 2015. 3M’s annual goodwill impairment testing is performed in the fourth quarter of each year. Impairment testing for goodwill is done at a reporting unit level, with all goodwill assigned to a reporting unit. Reporting units are one level below the business segment level, but can be combined when reporting units within the same segment have similar economic characteristics. At 3M, reporting units generally correspond to a division. 3M did not combine any of its reporting units for impairment testing.

An impairment loss generally would be recognized when the carrying amount of the reporting unit’s net assets exceeds the estimated fair value of the reporting unit. The estimated fair value of a reporting unit is determined using earnings forthe reporting unit multiplied by a price/earnings ratio for comparable industry groups, or by using a discounted cash flow analysis. 3M typically uses the price/earnings ratio approach for stable and growing businesses that have a long history and track record of generating positive operating income and cash flows. 3M uses the discounted cash flow approach for start-up, loss position and declining businesses, in addition to businesses where the price/earnings ratio valuation method indicates additional review is warranted. 3M also uses discounted cash flow as an additional tool for businesses that may be growing at a slower rate than planned due to economic or other conditions.

As described in Note 16, effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions. For any product moves that resulted in reporting unit changes, the Company applied the relative fair value method to determine the impact on goodwill of the associated reporting units. During the third quarter of 2015, the Company completed its assessment of any potential goodwill impairment for reporting units impacted by this new structure and determined that no impairment existed. The discussion that follows relates to the separate fourth quarter 2015 annual impairment test and is in the context of the reporting unit structure that existed at that time.

As of October 1, 2015, 3M had 26 primary reporting units, with ten reporting units accounting for approximately 87 percent of the goodwill. These ten reporting units were comprised of the following divisions: 3M purification (which

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includes the Polypore Separations Media acquisition), Advanced Materials, Communication Markets, Display Materials and Systems, Health Information Systems, Industrial Adhesives and Tapes, Infection Prevention, Oral Care Solutions, Personal Safety (which includes the Capital Safety acquisition), and Traffic Safety and Security. The estimated fair values for these reporting units were in excess of carrying value by approximately 50 percent or more, except for one reporting unit with approximately $300 million of goodwill, where the fair value exceeded the carrying value by approximately 30 percent. 3M’s market value at both September 30, 2015, and December 31, 2015, was significantly in excess of its equity of approximately $12 billion at both December 31, 2015 and September 30, 2015.

In 2015, 3M primarily used an industry price-earnings ratio approach, but also used a discounted cash flows approach for certain reporting units, to determine fair values. Where applicable, 3M used a weighted-average discounted cash flow analysis for certain divisions, using projected cash flows that were weighted based on different sales growth and terminal value assumptions, among other factors. The weighting was based on management’s estimates of the likelihood of each scenario occurring.

3M is an integrated materials enterprise, thus many of 3M’s businesses could not easily be sold on a stand-alone basis. 3M’s focus on research and development has resulted in a portion of 3M’s value being comprised of internally developed businesses that have no goodwill associated with them. Based on the annual test in the fourth quarter of 2015, no goodwill impairment was indicated for any of the reporting units.

Factors which could result in future impairment charges include, among others, changes in worldwide economic conditions, changes in competitive conditions and customer preferences, and fluctuations in foreign currency exchange rates. These risk factors are discussed in Item 1A, “Risk Factors,” of this document. In addition, changes in the weighted average cost of capital could also impact impairment testing results. As indicated above, during the third quarter of 2015, the Company completed its assessment of any potential goodwill impairment for reporting units impacted by changes between reporting units and determined that no impairment existed. Long-lived assets with a definite life are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. If future non-cash asset impairment charges are taken, 3M would expect that only a portion of the long-lived assets or goodwill would be impaired. 3M will continue to monitor its reporting units and asset groups in 2016 for any triggering events or other indicators of impairment.

Income Taxes:

The extent of 3M’s operations involves dealing with uncertainties and judgments in the application of complex tax regulations in a multitude of jurisdictions. The final taxes paid are dependent upon many factors, including negotiations with taxing authorities in various jurisdictions and resolution of disputes arising from federal, state, and international tax audits. The Company recognizes potential liabilities and records tax liabilities for anticipated tax audit issues in the United States and other tax jurisdictions based on its estimate of whether, and the extent to which, additional taxes will be due. The Company follows guidance provided by ASC 740, Income Taxes, regarding uncertainty in income taxes, to record these liabilities (refer to Note 8 for additional information). The Company adjusts these reserves in light of changing facts and circumstances; however, due to the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from the Company’s current estimate of the tax liabilities. If the Company’s estimate of tax liabilities proves to be less than the ultimate assessment, an additional charge to expense would result. If payment of these amounts ultimately proves to be less than the recorded amounts, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary.

NEW ACCOUNTING PRONOUNCEMENTS

Information regarding new accounting pronouncements is included in Note 1 to the Consolidated Financial Statements.

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FINANCIAL CONDITION AND LIQUIDITY

3M continues its transition to a better-optimized capital structure and is adding leverage at a measured pace. The strength and stability of 3M's business model and strong free cash flow capability, together with proven capital markets access, enable the Company to implement this strategy. Investing in 3M’s businesses to drive organic growth remains the first priority, thus 3M will continue to deploy capital towards research and development, capital expenditures, and commercialization capability. Investment in organic growth will be supplemented by complementary acquisitions. 3M will also continue to return cash to shareholders through dividends and share repurchases. Sources for cash availability in the United States, such as ongoing cash flow from operations and access to capital markets, have historically been sufficient to fund dividend payments to shareholders and share repurchases, as well as funding U.S. acquisitions and other items as needed. For those international earnings considered to be reinvested indefinitely, the Company currently has no plans or intentions to repatriate these funds for U.S. operations. However, if these international funds are needed for operations in the U.S., 3M would be required to accrue and pay U.S. taxes to repatriate them. See Note 8 for further information on earnings considered to be reinvested indefinitely.

3M’s primary short-term liquidity needs are met through cash on hand and U.S. commercial paper issuances. The Company believes it will have continuous access to the commercial paper market. 3M’s commercial paper program permits the Company to have a maximum of $3 billion outstanding with a maximum maturity of 397 days from date of issuance.

Net Debt:

The Company defines net debt as total debt less the total of cash, cash equivalents and marketable securities. 3M considers net debt and its components to be an important indicator of liquidity and a guiding measure of capital structure strategy. Net debt is not defined under U.S. generally accepted accounting principles and may not be computed the same as similarly titled measures used by other companies. The following table provides net debt as of December 31, 2015 and 2014.

At December 31
(Millions)	2015		2014
Total Debt	$	10,797	$	6,811
Less: Cash and cash equivalents and marketable securities		1,925		3,351
Net Debt	$	8,872	$	3,460

In 2015, net debt rose by $5.4 billion to a net debt balance of $8.9 billion (as of December 31, 2015), as 3M progressed on its capital structure strategy. Debt levels were higher in both the U.S. and internationally, while international cash and marketable securities balances were reduced. Specific actions related to cash, cash equivalents, and marketable securities, in addition to debt, are discussed further below.

Cash, Cash Equivalents and Marketable Securities:

At December 31, 2015, 3M had $1.9 billion of cash, cash equivalents and marketable securities, of which approximately $1.7 billion was held by the Company’s foreign subsidiaries and $200 million was held by the United States. Of the $1.7 billion held internationally, U.S. dollar-based cash, cash equivalents and marketable securities totaled $355 million, or 21 percent, which was invested in money market funds, asset-backed securities, agency securities, corporate medium-term note securities and other high quality fixed income securities. At December 31, 2014, cash, cash equivalents and marketable securities held by the Company’s foreign subsidiaries and in the United States totaled approximately $3.3 billion and less than $100 million, respectively.

The Company’s total balance of cash, cash equivalents and marketable securities was $1.4 billion lower at December 31, 2015 when compared to December 31, 2014. 3M was able to manage the business with lower cash levels due to significant ongoing cash flow generation and proven access to capital markets funding throughout business cycles.

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Total Debt:

The Company’s total debt was $4.0 billion higher at December 31, 2015 when compared to December 31, 2014. The strength of 3M’s capital structure and significant ongoing cash flows provide 3M proven access to capital markets. Additionally, the Company’s maturity profile is staggered to help ensure refinancing needs in any given year are reasonable in proportion to the total portfolio. The Company has an AA- credit rating, with a stable outlook, from Standard& Poor’s and an Aa3 credit rating, with a negative outlook, from Moody’s Investors Service. The Company’s ongoing transition to a better-optimized capital structure, financed with additional low-cost debt, could impact 3M’s credit rating in the future.

Effective May16, 2014, the Company updated its “well-known seasoned issuer” shelf registration statement, which registers an indeterminate amount of debt or equity securities for future sales. This replaced 3M’s previous shelf registration dated August5, 2011. In June2014, in connection with the May16, 2014 shelf registration, 3M re-commenced its medium-term notes program (SeriesF) under which 3M may issue, from time to time, up to $9 billion aggregate principal amount of notes. Included in this $9 billion are $8.17 billion (utilizing the foreign exchange rate applicable at the time of issuance for the Euro denominated debt) of notes previously issued in 2011, 2012, 2014, and 2015 as part of Series F.Information with respect to long-term debt issuances and maturities for the periods presented is included in Note 10.

In August2014, 3M amended and extended its existing $1.5 billion five-year multi-currency revolving credit agreement to a $2.25 billion five-year multi-currency revolving credit agreement, with an expiration date of August2019. This credit agreement includes a provision under which 3M may request an increase of up to $2.25 billion, bringing the total facility up to $4.5 billion (at the lenders’ discretion). This facility was undrawn at December 31, 2015. Under the $2.25 billion credit agreement, the Company is required to maintain its EBITDA to Interest Ratio as of the end of each fiscal quarter at not less than 3.0 to 1. This is calculated (as defined in the agreement) as the ratio of consolidated total EBITDA for the four consecutive quarters then ended to total interest expense on all funded debt for the same period. At December 31, 2015, this ratio was approximately 56 to 1. Debt covenants do not restrict the payment of dividends.Apart from the committed facilities, an additional $241 million in stand-alone letters of credit and $18 million in bank guarantees were also issued and outstanding at December 31, 2015. These lines of credit are utilized in connection with normal business activities.

Balance Sheet:

3M’s strong balance sheet and liquidity provide the Company with significant flexibility to take advantage of numerous opportunities going forward. The Company will continue to invest in its operations to drive growth, including continual review of acquisition opportunities.

Various assets and liabilities, including cash and short-term debt, can fluctuate significantly from month to month depending on short-term liquidity needs. Working capital (defined as current assets minus current liabilities) totaled $3.868 billion at December31, 2015, compared with $6.339 billion at December 31, 2014, a decrease of $2.471 billion. Current asset balance changes decreased working capital by $1.317 billion, driven by decreases in marketable securities. Current liability balance changes decreased working capital by $1.154 billion, driven byincreases in short-term debt.

The Company uses various working capital measures that place emphasis and focus on certain working capital assets and liabilities. These measures are not defined under U.S. generally accepted accounting principles and may not be computed the same as similarly titled measures used by other companies. One of the primary working capital measures 3M uses is a combined index, which includes accounts receivable, inventories and accounts payable. This combined index (defined as quarterly net sales — fourth quarter at year-end — multiplied by four, divided by ending net accounts receivable plus inventories less accounts payable) was 4.9 at December 31, 2015 compared to 5.0 at December 31, 2014. Receivables decreased $84 million, or 2.0 percent, compared with December 31, 2014,  ascurrency translation impacts decreased accounts receivable by $239 million, partially offset by 2015 acquisitions that added $103 million. Inventories decreased $188 million, or 5.1 percent, compared with December 31, 2014. The inventory decrease was attributable to currency translation, which decreased inventories by $272 million, partially offset by 2015 acquisitions that added $102 million.  

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Accounts payable decreased by $113 million compared with December 31, 2014, as currency translation impacts reduced accounts payable by $76 million.

Return on Invested Capital (non-GAAP measure):

The Company uses non-GAAP measures to focus on shareholder value creation. 3M uses return on invested capital (ROIC), defined as annualized after-tax operating income (including interest income) divided by average operating capital. Operating capital is defined as net assets (total assets less total liabilities) excluding debt. This measure is not recognized under U.S. GAAP and may not be comparable to similarly titled measures used by other companies. ROIC was 22.5 percent for 2015, and 22.0 percent for 2014.

Cash Flows:

Cash flows from operating, investing and financing activities are provided in the tables that follow. Individual amounts in the Consolidated Statement of Cash Flows exclude the effects of acquisitions, divestitures and exchange rate impacts on cash and cash equivalents, which are presented separately in the cash flows. Thus, the amounts presented in the following operating, investing and financing activities tables reflect changes in balances from period to period adjusted for these effects.

Cash Flows from Operating Activities:

Years Ended December 31
(Millions)	2015		2014		2013
Net income including noncontrolling interest	$	4,841	$	4,998	$	4,721
Depreciation and amortization		1,435		1,408		1,371
Company pension contributions		(264)		(210)		(476)
Company postretirement contributions		(3)		(5)		(6)
Company pension expense		442		310		446
Company postretirement expense		114		81		107
Stock-based compensation expense		276		280		240
Income taxes (deferred and accrued income taxes)		(349)		60		39
Excess tax benefits from stock-based compensation		(154)		(167)		(92)
Accounts receivable		(58)		(268)		(337)
Inventories		3		(113)		(86)
Accounts payable		9		75		16
Other — net		128		177		(126)
Net cash provided by operating activities	$	6,420	$	6,626	$	5,817

Cash flows from operating activities can fluctuate significantly from period to period, as pension funding decisions, tax timing differences and other items can significantly impact cash flows.

In 2015, cash flows provided by operating activities decreased $206 million compared to 2014. Operating cash flows decreased due to $363 million in higher cash income taxes when comparing 2015 to 2014, plus lower net income, which was partially offset by lower year-on-year working capital requirements. The combination of accounts receivable, inventories and accounts payable increased working capital by $46 million in2015, compared to increases of $306 million in 2014, with the year-on-year improvement related to lower organic volume growth. Additional discussion on working capital changes is provided earlier in the “Financial Condition and Liquidity” section.

In 2014, cash flows provided by operating activities increased $809 million compared to 2013. Operating cash flows benefited year-on-year from increases in net income including noncontrolling interest, lower pension and postretirement plans contributions, and lower year-on-year working capital requirements. The combination of accounts receivable, inventories and accounts payable increased working capital by $306 million in 2014, compared to increases of $407 million in 2013, with the year-on-year improvement partially due to higher receivable and inventory turns. Additional discussion on working capital changes is provided earlier in the “Financial Condition and Liquidity” section.

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Free Cash Flow (non-GAAP measure):

In addition, to net cash provided by operating activities, 3M believes free cash flow and free cash flow conversion are useful measures of performance and uses these measures as an indication of the strength of the Company and its ability to generate cash. Free cash flow and free cash flow conversion are not defined under U.S. generally accepted accounting principles (GAAP). Therefore, they should not be considered a substitute for income or cash flow data prepared in accordance with U.S. GAAP and may not be comparable to similarly titled measures used by other companies. 3M defines free cash flow as net cash provided by operating activities less purchases of property, plant and equipment (which is classified as an investing activity). It should not be inferred that the entire free cash flow amount is available for discretionary expenditures. 3M defines free cash flow conversion as free cash flow divided by net income attributable to 3M. Below find a recap of free cash flow and free cash flow conversion for 2015,  2014 and 2013.

Years ended December 31
(Millions)	2015			2014			2013
Net cash provided by operating activities	$	6,420		$	6,626		$	5,817
Purchases of property, plant and equipment (PP&E)		(1,461)			(1,493)			(1,665)
Free Cash Flow	$	4,959		$	5,133		$	4,152
Free Cash Flow Conversion		103	%		104	%		89	%

Cash Flows from Investing Activities:

Years ended December 31
(Millions)	2015		2014		2013
Purchases of property, plant and equipment (PP&E)	$	(1,461)	$	(1,493)	$	(1,665)
Proceeds from sale of PP&E and other assets		33		135		128
Acquisitions, net of cash acquired		(2,914)		(94)		—
Purchases and proceeds from maturities and sale of marketable securities and investments, net		1,300		754		627
Proceeds from sale of businesses		123		—		8
Other investing activities		102		102		46
Net cash used in investing activities	$	(2,817)	$	(596)	$	(856)

Investments in property, plant and equipment enable growth across many diverse markets, helping to meet product demand and increasing manufacturing efficiency. Capital spending was $1.461 billion in 2015, compared to $1.493 billion in 2014 and $1.665 billion in 2013. The Company expects 2016 capital spending to be approximately $1.3 billion to $1.5 billion as 3M continues to invest in its businesses.

3M invests in renewable and maintenance programs, which pertains to cost reduction, cycle time, maintaining and renewing current capacity, eliminating pollution, and compliance. Costs related to maintenance, ordinary repairs, and certain other items are expensed. 3M also invests in growth, which adds to capacity, driven by new products, both through expansion of current facilities and new facilities, plus research facilities. Finally, 3M also invests in other initiatives, such as information technology (IT) and corporate laboratory facilities.

In 2015, investments included new sites and buildings, investments in IT, continued expansion of current facilities and new facilities, plus the sustainment of existing facilities, in addition to other initiatives. Specific investments in 2015 included a new state-of-the-art, four story, 400,000 square foot research facility at 3M Center in St. Paul, Minnesota. In addition, 3M continued its investments it IT systems and infrastructure, particularly the ongoing multi-year phased implementation of an ERP system.

In 2014, investments in growth across geographies included production equipment, new sites and buildings, capacity investments, converting, and distribution, and other growth initiatives. Other investments include IT systems and infrastructure, including an ongoing multi-year phased implementation of an ERP system on a worldwide basis. In

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addition, 3M began a multi-year program in the United States to renew and upgrade laboratory facilities and administrative buildings.

In 2013, 3M continued its expansion of manufacturing capacity in key growth markets, including investments in the U.S., China, Germany, and Brazil. This included significant investments across 3M’s many businesses, such as abrasives, industrial adhesives and tapes, advanced materials, electronics-related, infection prevention, and other businesses. 3M continued its investments in IT systems and infrastructure. In addition, 3M sustained existing facilities through general maintenance, cost reduction, and compliance efforts.

Proceeds from sale of PP&E and other assets totaled $33 million in 2015, $135 million in 2014, and $128 million in 2013. Apart from the normal periodic sales of PP&E, 2014 included proceeds of $114 million related to the sales of real estate and non-production equipment, and 2013 included proceeds of $79 million related to non-production equipment.

Refer to Note 2 for information on acquisitions and divestitures. The Company is actively considering additional acquisitions, investments and strategic alliances, and from time to time may also divest certain businesses.

Purchases of marketable securities and investments and proceeds from maturities and sale of marketable securities and investments are primarily attributable to asset-backed securities, agency securities, corporate debt securities and other securities, which are classified as available-for-sale. Refer to Note 9 for more details about 3M’s diversified marketable securities portfolio. Purchases of investments include additional survivor benefit insurance, plus cost method and equity investments.

Cash Flows from Financing Activities:

Years ended December 31
(Millions)	2015		2014		2013
Change in short-term debt — net	$	860	$	27	$	(2)
Repayment of debt (maturities greater than 90 days)		(800)		(1,625)		(859)
Proceeds from debt (maturities greater than 90 days)		3,422		2,608		824
Total cash change in debt	$	3,482	$	1,010	$	(37)
Purchases of treasury stock		(5,238)		(5,652)		(5,212)
Proceeds from issuances of treasury stock pursuant to stock option and benefit plans		635		968		1,609
Dividends paid to stockholders		(2,561)		(2,216)		(1,730)
Excess tax benefits from stock-based compensation		154		167		92
Purchase of noncontrolling interest		—		(861)		—
Other — net		(120)		(19)		32
Net cash used in financing activities	$	(3,648)	$	(6,603)	$	(5,246)

Total debt was $10.8 billion at December 31, 2015, $6.8 billion at December 31, 2014, and $6.0 billion at December 31, 2013. Total debt was 48 percent of total capital (total capital is defined as debt plus equity) at year-end 2015,  34 percent of total capital at year-end 2014, and 25 percent of total capital at year-end 2013.  

In both 2015 and 2014, the change in short-term debt primarily related to bank borrowings by international subsidiaries, primarily Japan and Korea in 2015. In 2015, repayment of debt primarily related to debt assumed (and paid off) as part of the Capital Safety acquisition (refer to Note 2). In 2014, repayment of debt primarily includes repayment of a Eurobond in July2014 totaling 1.025 billion Euros (approximately $1.4 billion carrying value), repayment of the three-year 66 million British Pound committed credit facility agreement entered into in December2012, and repayment of other international debt. In 2013, repayment of debt related to the August2013 repayment of $850 million (principal amount) of medium-term notes.

In 2015, proceeds from debt primarily related to the May 2015 issuance of 650 million Euros aggregate principal amount of five-year floating rate medium-term notes due 2020, 600 million Euros aggregate principal amount of eight-year fixed rate medium-term notes due 2023, and 500 million Euros aggregate principal amount of fifteen-year fixed rate medium-

42

term notes due 2030, which in the aggregate total approximately $1.9 billion at issue date exchange rates. In addition, August 2015 issuances included $450 million aggregate principal amount of three-year fixed rate medium-term notes due 2018, $500 million aggregate principal amount of five-year fixed rate medium-term notes due 2020, and $550 million aggregate principal amount of 10-year fixed rate medium-term notes due 2025, which in aggregate total $1.5 billion. In 2014, proceeds from debt primarily related to the June2014 issuances of $625 million aggregate principal amount of five-year fixed rate medium-term notes due 2019 and $325 million aggregate principal amount of thirty-year fixed rate medium-term notes due 2044, as well as the November2014 issuances of 500 million Euros principal amount of four-year floating rate medium-term notes due 2018 and 750 million Euros principal amount of 12-year fixed rate medium-term notes due 2026. In addition, proceeds from debt for 2014 also include bank borrowings by international subsidiaries. Proceeds from debt in 2013 related to the November2013 issuance of an eight-year Eurobond for an amount of 600 million Euros. Refer to Note 10 for additional discussion of debt.

Repurchases of common stock are made to support the Company’s stock-based employee compensation plans and for other corporate purposes. In February 2016, 3M’s Board of Directors authorized the repurchase of up to $10 billion of 3M’s outstanding common stock, which replaced the Company’s February2014 repurchase program. This authorization has no pre-established end date. In 2015, 2014, and 2013, the Company purchased more than $5 billion of its own stock each year. The Company expects full-year 2016 gross share repurchases will be in the range of $4 billion to $6 billion. For more information, refer to the table titled “Issuer Purchases of Equity Securities” in Part II, Item 5. The Company does not utilize derivative instruments linked to the Company’s stock.

Cash dividends paid to shareholders totaled $2.561 billion ($4.10 per share) in 2015, $2.216 billion ($3.42 per share) in 2014, and $1.730 billion ($2.54 per share) in 2013. 3M has paid dividends since 1916. In February 2016, 3M’s Board of Directors declared a first-quarter 2016 dividend of $1.11 per share, an increase of 8  percent. This is equivalent to an annual dividend of $4.44 per share and marked the 58th consecutive year of dividend increases.

On September1, 2014, 3M purchased (via Sumitomo 3M Limited) Sumitomo Electric Industries,Ltd.’s 25 percent interest in 3M’s consolidated Sumitomo 3M Limited subsidiary for 90 billion Japanese Yen. Upon completion of this transaction, 3M owned 100 percent of Sumitomo 3M Limited. This was reflected as a “Purchase of noncontrolling interest” in the financing section of the consolidated statement of cash flows. In addition, in April2014, 3M purchased the remaining noncontrolling interest in a consolidated 3M subsidiary for an immaterial amount, which was also classified as a “Purchase of noncontrolling interest” in the financing section of the consolidated statement of cash flows.

In March2013, 3M sold shares in 3M India Limited, a subsidiary of the Company, in return for $8 million. The noncontrolling interest shares of this subsidiary trade on a public exchange in India. This sale of shares complied with an amendment to Indian securities regulations that required 3M India Limited, as a listed company, to achieve a minimum public shareholding of at least 25 percent. As a result of this transaction, 3M’s ownership in 3M India Limited was reduced from 76 percent to 75 percent. The $8 million received in the first quarter of 2013 was classified as other financing activity in the consolidated statement of cash flows.

In addition to the March2013 sale of noncontrolling interest described above, other cash flows from financing activities may include various other items, such as changes in cash overdraft balances, and principal payments for capital leases.

Off-Balance Sheet Arrangements and Contractual Obligations:

As of December 31, 2015, the Company has not utilized special purpose entities to facilitate off-balance sheet financing arrangements. Refer to the section entitled “Warranties/Guarantees” in Note 14 for discussion of accrued product warranty liabilities and guarantees.

In addition to guarantees, 3M, in the normal course of business, periodically enters into agreements that require the Company to indemnify either major customers or suppliers for specific risks, such as claims for injury or property damage arising out of the use of 3M products or the negligence of 3M personnel, or claims alleging that 3M products infringe third-party patents or other intellectual property. While 3M’s maximum exposure under these indemnification provisions cannot be estimated, these indemnifications are not expected to have a material impact on the Company’s consolidated results of operations or financial condition.

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A summary of the Company’s significant contractual obligations as of December 31, 2015, follows:

Contractual Obligations

			Payments due by year
													After
(Millions)	Total		2016		2017		2018		2019		2020		2020
Long-term debt, including current portion (Note 10)	$	9,878	$	1,125	$	744	$	993	$	622	$	1,203	$	5,191
Interest on long-term debt		2,244		174		157		153		149		146		1,465
Operating leases (Note 14)		943		234		191		134		86		72		226
Capital leases (Note 14)		59		11		6		4		3		3		32
Unconditional purchase obligations and other		1,631		1,228		160		102		54		56		31
Total contractual cash obligations	$	14,755	$	2,772	$	1,258	$	1,386	$	914	$	1,480	$	6,945

Long-term debt payments due in 2016 and 2017 include floating rate notes totaling $126 million (classified as current portion of long-term debt), and $96 million (included as a separate floating rate note in the long-term debt table), respectively, as a result of put provisions associated with these debt instruments. Interest projections on both floating and fixed rate long-term debt, including the effects of interest rate swaps, are based on effective interest rates as of December 31, 2015.

Unconditional purchase obligations are defined as an agreement to purchase goods or services that is enforceable and legally binding on the Company. Included in the unconditional purchase obligations category above are certain obligations related to take or pay contracts, capital commitments, service agreements and utilities. These estimates include both unconditional purchase obligations with terms in excess of one year and normal ongoing purchase obligations with terms of less than one year. Many of these commitments relate to take or pay contracts, in which 3M guarantees payment to ensure availability of products or services that are sold to customers. The Company expects to receive consideration (products or services) for these unconditional purchase obligations. Contractual capital commitments are included in the preceding table, but these commitments represent a small part of the Company’s expected capital spending in 2016 and beyond. The purchase obligation amounts do not represent the entire anticipated purchases in the future, but represent only those items for which the Company is contractually obligated. The majority of 3M’s products and services are purchased as needed, with no unconditional commitment. For this reason, these amounts will not provide a reliable indicator of the Company’s expected future cash outflows on a stand-alone basis.

Other obligations, included in the preceding table within the caption entitled “Unconditional purchase obligations and other,” include the current portion of the liability for uncertain tax positions under ASC 740, which is expected to be paidout in cash in the next 12 months. The Company is not able to reasonably estimate the timing of the long-term payments or the amount by which the liability will increase or decrease over time; therefore, the long-term portion of the net tax liability of $208 million is excluded from the preceding table. Refer to Note 8 for further details.

As discussed in Note 11, the Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2016 and Company contributions to its U.S. and international pension plans are expected to be largely discretionary in future years; therefore, amounts related to these plans are not included in the preceding table.

FINANCIAL INSTRUMENTS

The Company enters into foreign exchange forward contracts, options and swaps to hedge against the effect of exchange rate fluctuations on cash flows denominated in foreign currencies and certain intercompany financing transactions. The Company manages interest rate risks using a mix of fixed and floating rate debt. To help manage borrowing costs, the Company may enter into interest rate swaps. Under these arrangements, the Company agrees to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. The Company manages commodity price risks through negotiated supply contracts, price protection agreements and forward contracts.

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Refer to Item 7A, “Quantitative and Qualitative Disclosures About Market Risk”, for further discussion of foreign exchange rates risk, interest rates risk, commodity prices risk and value at risk analysis.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

In the context of Item 7A, 3M is exposed to market risk due to the risk of loss arising from adverse changes in foreign currency exchange rates, interest rates and commodity prices. Changes in those factors could cause fluctuations in earnings and cash flows. Senior management provides oversight for risk management and derivative activities, determines certain of the Company’s financial risk policies and objectives, and provides guidelines for derivative instrument utilization. Senior management also establishes certain associated procedures relative to control and valuation, risk analysis, counterparty credit approval, and ongoing monitoring and reporting.

The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company’s risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. The Company does not anticipate nonperformance by any of these counterparties.

Foreign Exchange Rates Risk:

Foreign currency exchange rates and fluctuations in those rates may affect the Company’s net investment in foreign subsidiaries and may cause fluctuations in cash flows related to foreign denominated transactions. 3M is also exposed to the translation of foreign currency earnings to the U.S. dollar. The Company enters into foreign exchange forward and option contracts to hedge against the effect of exchange rate fluctuations on cash flows denominated in foreign currencies. These transactions are designated as cash flow hedges. 3M may dedesignate these cash flow hedge relationships in advance of the occurrence of the forecasted transaction. Beginning in the second quarter of 2014, 3M began extending the maximum length of time over which it hedges its exposure to the variability in future cash flows of the forecasted transactions from a previous term of 12 months to a longer term of 24 months, with certain currencies being extended further to 36 months starting in the first quarter of 2015. In addition, 3M enters into foreign currency forward contracts that are not designated in hedging relationships to offset, in part, the impacts of certain intercompany activities (primarily associated with intercompany licensing arrangements and intercompany financing transactions). As circumstances warrant, the Company also uses foreign currency forward contracts and foreign currency denominated debt as hedging instruments to hedge portions of the Company’s net investments in foreign operations. The dollar equivalent gross notional amount of the Company’s foreign exchange forward and option contracts designated as cash flow hedges and those not designated as hedging instruments were $2.8 billion and $5.4 billion, respectively, at December 31, 2015. As of December 31, 2015, the Company had 974 million Euros and 248 billion South Korean Won in notional amount of foreign currency forward contracts designated as net investment hedges along with 3.6 billion Euros in principal amount of foreign currency denominated debt designated as non-derivative hedging instruments in certain net investment hedges as discussed in Note 12 in the “Net Investment Hedges” section.

Interest Rates Risk:

The Company may be impacted by interest rate volatility with respect to existing debt and future debt issuances. 3M manages interest expense using a mix of fixed and floating rate debt. To help manage borrowing costs, the Company may enter into interest rate swaps that are designated and qualify as fair value hedges. Under these arrangements, the Company agrees to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. The dollar equivalent (based on inception date foreign currency exchange rates) gross notional amount of the Company’s interest rate swaps at December 31, 2015 was $1.8 billion. Additional details about 3M’s long-term debt can be found in Note 10, including references to information regarding derivatives and/or hedging instruments associated with the Company’s long-term debt.

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Commodity Prices Risk:

The Company manages commodity price risks through negotiated supply contracts, price protection agreements and forward contracts. 3M used commodity price swaps as cash flow hedges of forecasted commodity transactions to manage price volatility, but discontinued this practice in the first quarter of 2015. The related mark-to-market gain or loss on qualifying hedges was included in other comprehensive income to the extent effective, and reclassified into cost of sales in the period during which the hedged transaction affected earnings.

Value At Risk:

The value at risk analysis is performed annually to assess the Company’ssensitivity to changes in currency rates, interest rates, and commodity prices. A Monte Carlo simulation technique was used to test the impact on after-tax earnings related to financial instruments (primarily debt), derivatives and underlying exposures outstanding at December 31, 2015. The model (third-party bank dataset) used a 95 percent confidence level over a 12-month time horizon. The exposure to changes in currency rates model used 18 currencies, interest rates related to three currencies, and commodity prices related to five commodities. This model does not purport to represent what actually will be experienced by the Company. This model does not include certain hedge transactions, because the Company believes their inclusion would not materially impact the results.The risk of loss or benefit associated with exchange rates was higher in 2015 due to a greater mix of floating rate debt and a rising interest rate environment in the U.S. Interest rate volatility increased in 2015, based on a higher mix of floating rate debt and the use of forward rates. The following table summarizes the possible adverse and positive impacts to after-tax earnings related to these exposures.

	Adverse impact on after-tax				Positive impact on after-tax
	earnings				earnings
(Millions)	2015		2014		2015		2014
Foreign exchange rates	$	(254)	$	(164)	$	273	$	173
Interest rates		(13)		(4)		9		3
Commodity prices		(1)		(1)		1		1

In addition to the possible adverse and positive impacts discussed in the preceding table related to foreign exchange rates, recent historical information is as follows. 3M estimates that year-on-year currency effects, including hedging impacts, had the following effects on pre-tax income: 2015 ($390million decrease) and 2014 ($100 million decrease). This estimate includes the effect of translating profits from local currencies into U.S. dollars; the impact of currency fluctuations on the transfer of goods between 3M operations in the United States and abroad; and transaction gains and losses, including derivative instruments designed to reduce foreign currency exchange rate risks and the negative impact of swapping Venezuelan bolivars into U.S. dollars. 3M estimates that year-on-year derivative and other transaction gains and losses had the following effects on pre-tax income: 2015 ($180million increase) and2014 ($10 million increase).

An analysis of the global exposures related to purchased components and materials is performed at each year-end. A one percent price change would result in a pre-tax cost or savings of approximately $70 million per year. The global energy exposure is such that a ten percent price change would result in a pre-tax cost or savings of approximately $40 million per year. Global energy exposure includes energy costs used in 3M production and other facilities, primarily electricity and natural gas.

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Item 8. Financial Statements and Supplementary Data.

Index to Financial Statements

	Beginning page
Management’s Responsibility for Financial Reporting	48
Management’s Report on Internal Control Over Financial Reporting	48
Report of Independent Registered Public Accounting Firm	49
Consolidated Statement of Income for the years ended December 31, 2015, 2014 and 2013	50
Consolidated Statement of Comprehensive Income for the years ended December 31, 2015, 2014 and 2013	51
Consolidated Balance Sheet at December 31, 2015 and 2014	52
Consolidated Statement of Changes in Equity for the years ended December 31, 2015, 2014 and 2013	53
Consolidated Statement of Cash Flows for the years ended December 31, 2015, 2014 and 2013	54
Notes to Consolidated Financial Statements	55
Note 1. Significant Accounting Policies	55
Note 2. Acquisitions and Divestitures	64
Note 3. Goodwill and Intangible Assets	67
Note 4. Restructuring Actions	68
Note 5. Supplemental Balance Sheet Information	70
Note 6. Supplemental Equity and Comprehensive Income Information	71
Note 7. Supplemental Cash Flow Information	73
Note 8. Income Taxes	73
Note 9. Marketable Securities	77
Note 10. Long-Term Debt and Short-Term Borrowings	79
Note 11. Pension and Postretirement Benefit Plans	81
Note 12. Derivatives	91
Note 13. Fair Value Measurements	98
Note 14. Commitments and Contingencies	102
Note 15. Stock-Based Compensation	112
Note 16. Business Segments	115
Note 17. Geographic Areas	117
Note 18. Quarterly Data (Unaudited)	117

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Management’s Responsibility for Financial Reporting

Management is responsible for the integrity and objectivity of the financial information included in this report. The financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America. Where necessary, the financial statements reflect estimates based on management’s judgment.

Management has established and maintains a system of internal control over financial reporting for the Company and its subsidiaries. This system and its established accounting procedures and related controls are designed to provide reasonable assurance that assets are safeguarded, that the books and records properly reflect all transactions, that policies and procedures are implemented by qualified personnel, and that published financial statements are properly prepared and fairly presented. The Company’s system of internal control over financial reporting is supported by widely communicated written policies, including business conduct policies, which are designed to require all employees to maintain high ethical standards in the conduct of Company affairs. Internal auditors continually review the accounting and control system.

3M Company

Management’s Report on Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining an adequate system of internal control over financial reporting. Management conducted an assessment of the Company’s internal control over financial reporting based on the framework established by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control — Integrated Framework (2013).  Management’s assessment of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2015 excluded Capital Safety Group S.A.R.L. and Polypore International, Inc.’s Separation Media Business, which were both acquired by the Company in August 2015 in purchase business combinations. These acquired businesses’ total assets and total net sales, in the aggregate, represented less than 2 percent and less than 1 percent, respectively, of the Company’s consolidated financial statement amounts as of and for the year ended December 31, 2015. Companies are allowed to exclude acquisitions from their assessment of internal control over financial reporting during the first year of acquisition while integrating the acquired company under guidelines established by the Securities and Exchange Commission. Based on the assessment, management concluded that, as of December 31, 2015, the Company’s internal control over financial reporting is effective.

The Company’s internal control over financial reporting as of December 31, 2015 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which is included herein, which expresses an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2015.

3M Company

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Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors of 3M Company

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of 3M Company and its subsidiaries(the “Company”) at December 31, 2015 and 2014, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2015 in conformity with accounting principles generally accepted in the United States of America.  Also in our opinion, the Company 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(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  The Company's management is responsible for these financial statements, 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 opinions on these financial statements and on the Company's internal control over financial reporting based on our integrated 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 audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects.  Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation.  Our audit of internal control over financial reporting 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 audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

As discussed in Note 1 to the consolidated financial statements, the Company changed the manner in which it accounts for marketable securities and deferred tax assets and liabilities in 2015.

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 (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) 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 (iii) 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.

As described in Management's Report on Internal Control over Financial Reporting, management has excluded Capital Safety Group S.A.R.L. (“Capital Safety”) and Polypore International, Inc.’s Separations Media Business (“Polypore Separations Media”) from its assessment of internal control over financial reporting as of December 31, 2015 because these businesses were acquired by the Company in purchase business combinations during 2015.  We have also excluded Capital Safety and Polypore Separations Media from our audit of internal control over financial reporting.  Capital Safety is a wholly-owned subsidiary of the Company and the Company acquired the assets and liabilities of Polypore Separations Media whose total assets and total net sales, in the aggregate, represent less than 2 percent and less than 1 percent, respectively, of the related consolidated financial statement amounts as of and for the year ended December 31, 2015.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Minneapolis, Minnesota

February 11, 2016

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Consolidated Statement of Income

3M Company and Subsidiaries

Years ended December31

	2015		2014		2013
Net sales	$	30,274	$	31,821	$	30,871
Operating expenses
Cost of sales		15,383		16,447		16,106
Selling, general and administrative expenses		6,182		6,469		6,384
Research, development and related expenses		1,763		1,770		1,715
Total operating expenses		23,328		24,686		24,205
Operating income		6,946		7,135		6,666
Interest expense and income
Interest expense		149		142		145
Interest income		(26)		(33)		(41)
Total interest expense — net		123		109		104
Income before income taxes		6,823		7,026		6,562
Provision for income taxes		1,982		2,028		1,841
Net income including noncontrolling interest	$	4,841	$	4,998	$	4,721
Less: Net income attributable to noncontrolling interest		8		42		62
Net income attributable to 3M	$	4,833	$	4,956	$	4,659
Weighted average 3M common shares outstanding — basic		625.6		649.2		681.9
Earnings per share attributable to 3M common shareholders — basic	$	7.72	$	7.63	$	6.83
Weighted average 3M common shares outstanding — diluted		637.2		662.0		693.6
Earnings per share attributable to 3M common shareholders — diluted	$	7.58	$	7.49	$	6.72
Cash dividends paid per 3M common share	$	4.10	$	3.42	$	2.54

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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Consolidated Statement of Comprehensive Income

3M Company and Subsidiaries

Years ended December31

(Millions)	2015		2014		2013
Net income including noncontrolling interest	$	4,841	$	4,998	$	4,721
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment		(586)		(942)		(505)
Defined benefit pension and postretirement plans adjustment		489		(1,562)		1,245
Debt and equity securities, unrealized gain (loss)		—		2		—
Cash flow hedging instruments, unrealized gain (loss)		25		107		15
Total other comprehensive income (loss), net of tax		(72)		(2,395)		755
Comprehensive income (loss) including noncontrolling interest		4,769		2,603		5,476
Comprehensive (income) loss attributable to noncontrolling interest		(6)		(48)		20
Comprehensive income (loss) attributable to 3M	$	4,763	$	2,555	$	5,496

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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Consolidated Balance Sheet

3M Company and Subsidiaries

At December31

(Dollars in millions, except per share amount)	2015		2014
Assets
Current assets
Cash and cash equivalents	$	1,798	$	1,897
Marketable securities — current		118		1,439
Accounts receivable — net of allowances of $91 and $94		4,154		4,238
Inventories
Finished goods		1,655		1,723
Work in process		1,008		1,081
Raw materials and supplies		855		902
Total inventories		3,518		3,706
Other current assets		1,398		1,023
Total current assets		10,986		12,303
Marketable securities — non-current		9		15
Investments		117		102
Property, plant and equipment		23,098		22,841
Less: Accumulated depreciation		(14,583)		(14,352)
Property, plant and equipment — net		8,515		8,489
Goodwill		9,249		7,050
Intangible assets — net		2,601		1,435
Prepaid pension benefits		188		46
Other assets		1,053		1,769
Total assets	$	32,718	$	31,209
Liabilities
Current liabilities
Short-term borrowings and current portion of long-term debt	$	2,044	$	106
Accounts payable		1,694		1,807
Accrued payroll		644		732
Accrued income taxes		332		435
Other current liabilities		2,404		2,884
Total current liabilities		7,118		5,964
Long-term debt		8,753		6,705
Pension and postretirement benefits		3,520		3,843
Other liabilities		1,580		1,555
Total liabilities	$	20,971	$	18,067
Commitments and contingencies (Note 14)
Equity
3M Company shareholders’ equity:
Common stock, par value $.01 per share	$	9	$	9
Shares outstanding - 2015: 609,330,124
Shares outstanding - 2014: 635,134,594
Additional paid-in capital		4,791		4,379
Retained earnings		36,575		34,317
Treasury stock		(23,308)		(19,307)
Accumulated other comprehensive income (loss)		(6,359)		(6,289)
Total 3M Company shareholders’ equity		11,708		13,109
Noncontrolling interest		39		33
Total equity	$	11,747	$	13,142
Total liabilities and equity	$	32,718	$	31,209

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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Consolidated Statement of Changes in Equity

3M Company and Subsidiaries

Years Ended December31

			3M Company Shareholders
			Common						Accumulated
			Stock and						Other
			Additional						Comprehensive		Non-
			Paid-in		Retained		Treasury		Income		controlling
(Dollars in millions, except per share amounts)	Total		Capital		Earnings		Stock		(Loss)		Interest
Balance at December 31, 2012	$	18,040	$	4,053	$	30,679	$	(12,407)	$	(4,750)	$	465
Net income		4,721				4,659						62
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment		(505)								(418)		(87)
Defined benefit pension and post-retirement plans adjustment		1,245								1,240		5
Debt and equity securities - unrealized gain (loss)		—								—		—
Cash flow hedging instruments - unrealized gain (loss)		15								15		—
Total other comprehensive income (loss), net of tax		755
Dividends declared ($3.395 per share, Note 6)		(2,297)				(2,297)
Sale of subsidiary shares		8		7								1
Stock-based compensation, net of tax impacts		324		324
Reacquired stock		(5,216)						(5,216)
Issuances pursuant to stock option and benefit plans		1,613				(625)		2,238
Balance at December 31, 2013	$	17,948	$	4,384	$	32,416	$	(15,385)	$	(3,913)	$	446
Net income		4,998				4,956						42
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment		(942)								(948)		6
Defined benefit pension and post-retirement plans adjustment		(1,562)								(1,562)		—
Debt and equity securities - unrealized gain (loss)		2								2		—
Cash flow hedging instruments - unrealized gain (loss)		107								107		—
Total other comprehensive income (loss), net of tax		(2,395)
Dividends declared ($3.59 per share, Note 6)		(2,297)				(2,297)
Purchase of subsidiary shares		(870)		(434)						25		(461)
Stock-based compensation, net of tax impacts		438		438
Reacquired stock		(5,643)						(5,643)
Issuances pursuant to stock option and benefit plans		963				(758)		1,721
Balance at December 31, 2014	$	13,142	$	4,388	$	34,317	$	(19,307)	$	(6,289)	$	33
Net income		4,841				4,833						8
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment		(586)								(584)		(2)
Defined benefit pension and post-retirement plans adjustment		489								489		—
Debt and equity securities - unrealized gain (loss)		—								—		—
Cash flow hedging instruments - unrealized gain/(loss)		25								25		—
Total other comprehensive income (loss), net of tax		(72)
Dividends declared ($3.075 per share, Note 6)		(1,913)				(1,913)
Stock-based compensation, net of tax impacts		412		412
Reacquired stock		(5,304)						(5,304)
Issuances pursuant to stock option and benefit plans		641				(662)		1,303
Balance at December 31, 2015	$	11,747	$	4,800	$	36,575	$	(23,308)	$	(6,359)	$	39

Supplemental share information	2015	2014	2013
Treasury stock
Beginning balance	308,898,462	280,736,817	256,941,406
Reacquired stock	34,072,584	40,664,061	45,445,610
Issuances pursuant to stock options and benefit plans	(8,268,114)	(12,502,416)	(21,650,199)
Ending balance	334,702,932	308,898,462	280,736,817

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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Consolidated Statement of Cash Flows

3M Company and Subsidiaries

Years ended December31

(Millions)	2015		2014		2013
Cash Flows from Operating Activities
Net income including noncontrolling interest	$	4,841	$	4,998	$	4,721
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities
Depreciation and amortization		1,435		1,408		1,371
Company pension and postretirement contributions		(267)		(215)		(482)
Company pension and postretirement expense		556		391		553
Stock-based compensation expense		276		280		240
Deferred income taxes		395		(146)		(167)
Excess tax benefits from stock-based compensation		(154)		(167)		(92)
Changes in assets and liabilities
Accounts receivable		(58)		(268)		(337)
Inventories		3		(113)		(86)
Accounts payable		9		75		16
Accrued income taxes (current and long-term)		(744)		206		206
Other — net		128		177		(126)
Net cash provided by operating activities		6,420		6,626		5,817
Cash Flows from Investing Activities
Purchases of property, plant and equipment (PP&E)		(1,461)		(1,493)		(1,665)
Proceeds from sale of PP&E and other assets		33		135		128
Acquisitions, net of cash acquired		(2,914)		(94)		—
Purchases of marketable securities and investments		(652)		(1,280)		(4,040)
Proceeds from maturities and sale of marketable securities and investments		1,952		2,034		4,667
Proceeds from sale of businesses		123		—		8
Other investing		102		102		46
Net cash used in investing activities		(2,817)		(596)		(856)
Cash Flows from Financing Activities
Change in short-term debt — net		860		27		(2)
Repayment of debt (maturities greater than 90 days)		(800)		(1,625)		(859)
Proceeds from debt (maturities greater than 90 days)		3,422		2,608		824
Purchases of treasury stock		(5,238)		(5,652)		(5,212)
Proceeds from issuance of treasury stock pursuant to stock option and benefit plans		635		968		1,609
Dividends paid to shareholders		(2,561)		(2,216)		(1,730)
Excess tax benefits from stock-based compensation		154		167		92
Purchase of noncontrolling interest		—		(861)		—
Other — net		(120)		(19)		32
Net cash used in financing activities		(3,648)		(6,603)		(5,246)
Effect of exchange rate changes on cash and cash equivalents		(54)		(111)		(17)
Net increase (decrease) in cash and cash equivalents		(99)		(684)		(302)
Cash and cash equivalents at beginning of year		1,897		2,581		2,883
Cash and cash equivalents at end of period	$	1,798	$	1,897	$	2,581

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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Notes to Consolidated Financial Statements

NOTE 1.  Significant Accounting Policies

Consolidation: 3M is a diversified global manufacturer, technology innovator and marketer of a wide variety of products. All subsidiaries are consolidated. All intercompany transactions are eliminated. As used herein, the term “3M” or “Company” refers to 3M Company and subsidiaries unless the context indicates otherwise.

Basis of presentation: Certain balances relative to prior periods have been reclassified to conform to December 31, 2015 presentation in connection with the following, each of which is further discussed in the indicated section of Note 1:

· Change in method of classification of certain marketable securities previously classified as non-current to current as further discussed in the Marketable securities section; and

· Adoption of Accounting Standards Update (ASU) No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, in the fourth quarter of 2015 on a retrospective basis as further discussed in the New Accounting Pronouncements section.

Foreign currency translation: Local currencies generally are considered the functional currencies outside the United States. Assets and liabilities for operations in local-currency environments are translated at month-end exchange rates of the period reported. Income and expense items are translated at month-end exchange rates of each applicable month. Cumulative translation adjustments are recorded as a component of accumulated other comprehensive income (loss) in shareholders’ equity.

Although local currencies are typically considered as the functional currencies outside the United States, under Accounting Standards Codification (ASC) 830, Foreign Currency Matters, the reporting currency of a foreign entity’s parent is assumed to be that entity’s functional currency when the economic environment of a foreign entity is highly inflationary—generally when its cumulative inflation is approximately 100 percent or more for the three years that precede the beginning of a reporting period. 3M has a subsidiary in Venezuela with operating income representing less than 1.0 percent of 3M’s consolidated operating income for 2015. Since January 1, 2010, the financial statements of the Venezuelan subsidiary have been remeasured as if its functional currency were that of its parent.

The Venezuelan government sets official rates of exchange and conditions precedent to purchase foreign currency at these rates with local currency. Such rates and conditions have been and continue to be subject to change. In January 2014, the Venezuelan government announced that the National Center for Foreign Commerce (CENCOEX), had assumed the role with respect to the continuation of the existing official exchange rate, significantly expanded the use of a second currency auction exchange mechanism called the Complementary System for Foreign Currency Acquirement (or SICAD1), and issued exchange regulations indicating the SICAD1 rate of exchange would be used for payments related to international investments. In late March 2014, the Venezuelan government launched a third foreign exchange mechanism, SICAD2, which it later replaced with another foreign currency exchange platform in February 2015 called the Marginal System of Foreign Currency (SIMADI). The SIMADI rate was described as being derived from daily private bidders and buyers exchanging offers through authorized agents. This rate is approved and published by the Venezuelan Central Bank.

The financial statements of 3M’s Venezuelan subsidiary were remeasured utilizing the official CENCOEX (or its predecessor) rate into March 2014, the SICAD1 rate beginning in late March 2014, the SICAD2 rate beginning in June 2014, and the SIMADI rate beginning in February 2015. 3M’s uses of these rates were based upon evaluation of a number of factors including, but not limited to, the exchange rate the Company’s Venezuelan subsidiary may legally use to convert currency, settle transactions or pay dividends; the probability of accessing and obtaining currency by use of a particular rate or mechanism; and the Company’s intent and ability to use a particular exchange mechanism. Other factors notwithstanding, remeasurement impacts of the changes in use of these exchange rates did not have material impacts on 3M’s consolidated results of operations or financial condition.

The Company continues to monitor circumstances relative to its Venezuelan subsidiary. Changes in applicable exchange rates or exchange mechanisms may continue in the future. These changes could impact the rate of exchange applicable to remeasure the Company’s net monetary assets (liabilities) denominated in Venezuelan Bolivars (VEF). As of

55

December 31, 2015, the Company had a balance of net monetary liabilities denominated in VEF of less than 500 million VEF and the CENCOEX, SICAD (formerly SICAD1), and SIMADI exchange rates were approximately 6 VEF, 13 VEF, and 200 VEF per U.S. dollar, respectively.

A need to deconsolidate the Company’s Venezuelan subsidiary’s operations may result from a lack of exchangeability of VEF-denominated cash coupled with an acute degradation in the ability to make key operational decisions due to government regulations in Venezuela. 3M monitors factors such as its ability to access various exchange mechanisms; the impact of government regulations on the Company’s ability to manage its Venezuelan subsidiary’s capital structure, purchasing, product pricing, and labor relations; and the current political and economic situation within Venezuela. Based upon such factors as of December 31, 2015, the Company continues to consolidate its Venezuelan subsidiary. As of December 31, 2015, the balance of intercompany receivables due from this subsidiary and its equity balance are not significant.

Reclassifications: Certain amounts in the prior years’ consolidated financial statements have been reclassified to conform to the current year presentation.

Use of estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

Cash and cash equivalents: Cash and cash equivalents consist of cash and temporary investments with maturities of three months or less when acquired.

Marketable securities: Effective December 31, 2015, the Company changed the method of classification of certain securities previously classified as non-current to current. This new method classifies these securities as current or non-current based on the nature of the securities and availability for use in current operations while the prior classification was based on management’s intended holding period, the security’s maturity date and liquidity considerations based on market conditions. The Company believes this method is preferable because it is consistent with how the Company manages its capital structure and liquidity. The prior period balance has been reclassified to conform to the current year presentation:

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adjusted
Marketable securities - current	$	626	$	813	$	1,439
Marketable securities - non-current		828		(813)		15
Total marketable securities	$	1,454	$	—	$	1,454

3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders’ equity. Such an unrealized loss does not reduce net income for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.

Investments: Investments primarily include equity method, cost method, and available-for-sale equity investments. Available-for-sale investments are recorded at fair value. Unrealized gains and losses relating to investments classified as available-for-sale are recorded as a component of accumulated other comprehensive income (loss) in shareholders’ equity.

Other assets: Other assets include deferred income taxes, product and other insurance receivables, the cash surrender value of life insurance policies, and other long-term assets. Investments in life insurance are reported at the amount that could be realized under contract at the balance sheet date, with any changes in cash surrender value or contract value during the period accounted for as an adjustment of premiums paid. Cash outflows and inflows associated with life

56

insurance activity are included in “Purchases of marketable securities and investments” and “Proceeds from maturities and sale of marketable securities and investments,” respectively.

Inventories: Inventories are stated at the lower of cost or market, with cost generally determined on a first-in, first-out basis.

Property, plant and equipment: Property, plant and equipment, including capitalized interest and internal engineering costs, are recorded at cost. Depreciation of property, plant and equipment generally is computed using the straight-line method based on the estimated useful lives of the assets. The estimated useful lives of buildings and improvements primarily range from ten to forty years, with the majority in the range of twenty to forty years. The estimated useful lives of machinery and equipment primarily range from three to fifteen years, with the majority in the range of five to ten years. Fully depreciated assets are retained in property and accumulated depreciation accounts until disposal. Upon disposal, assets and related accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposal, is charged or credited to operations. Property, plant and equipment amounts are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss would be recognized when the carrying amount of an asset exceeds the estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition. The amount of the impairment loss recorded is calculated by the excess of the asset’s carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.

Conditional asset retirement obligations: A liability is initially recorded at fair value for an asset retirement obligation associated with the retirement of tangible long-lived assets in the period in which it is incurred if a reasonable estimate of fair value can be made. Conditional asset retirement obligations exist for certain long-term assets of the Company. The obligation is initially measured at fair value using expected present value techniques. Over time the liabilities are accreted for the change in their present value and the initial capitalized costs are depreciated over the remaining useful lives of the related assets. The asset retirement obligation liability was $102 million and $96 million at December 31, 2015 and 2014, respectively.

Goodwill: Goodwill is the excess of cost of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized. Goodwill is tested for impairment annually in the fourth quarter of each year, and is tested for impairment between annual tests if an event occurs or circumstances change that would indicate the carrying amount may be impaired. Impairment testing for goodwill is done at a reporting unit level, with all goodwill assigned to a reporting unit. Reporting units are one level below the business segment level, but can be combined when reporting units within the same segment have similar economic characteristics. 3M did not combine any of its reporting units for impairment testing. An impairment loss generally would be recognized when the carrying amount of the reporting unit’s net assets exceeds the estimated fair value of the reporting unit. The estimated fair value of a reporting unit is determined using earnings for the reporting unit multiplied by a price/earnings ratio for comparable industry groups, or by using a discounted cash flow analysis. Companies have the option to first assess qualitative factors to determine whether the fair value of a reporting unit is not “more likely than not” less than its carrying amount, which is commonly referred to as “Step 0”. 3M has chosen not to apply Step 0 for 2015 or prior period annual goodwill assessments.

Intangible assets: Intangible asset types include customer related, patents, other technology-based, tradenames and other intangible assets acquired from an independent party. Intangible assets with a definite life are amortized over a period ranging from one to twenty years on a systematic and rational basis (generally straight line) that is representative of the asset’s use. The estimated useful lives vary by category, with customer related largely between seven to seventeen years, patents largely between five to thirteen years, other technology-based largely between two to fifteen years, definite lived tradenames largely between three and twenty years, and other intangibles largely between two to ten years. Costs related to internally developed intangible assets, such as patents, are expensed as incurred, primarily in “Research, development and related expenses.”

Intangible assets with a definite life are tested for impairment whenever events or circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss is recognized when the carrying amount of an asset exceeds the estimated undiscounted cash flows used in determining the fair value of the asset. The

57

amount of the impairment loss recorded is calculated by the excess of the asset’s carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.

Intangible assets with an indefinite life, namely certain tradenames, are not amortized. Indefinite-lived intangible assets are tested for impairment annually, and are tested for impairment between annual tests if an event occurs or circumstances change that would indicate that the carrying amount may be impaired. An impairment loss generally would be recognized when the fair value is less than the carrying value of the indefinite-lived intangible asset.

Restructuring actions: Restructuring actions generally include significant actions involving employee-related severance charges, contract termination costs, and impairment or accelerated depreciation/amortization of assets associated with such actions. Employee-related severance charges are largely based upon distributed employment policies and substantive severance plans. These charges are reflected in the quarter when the actions are probable and the amounts are estimable, which typically is when management approves the associated actions. Severance amounts for which affected employees were required to render service in order to receive benefits at their termination dates were measured at the date such benefits were communicated to the applicable employees and recognized as expense over the employees’ remaining service periods. Contract termination and other charges primarily reflect costs to terminate a contract before the end of its term (measured at fair value at the time the Company provided notice to the counterparty) or costs that will continue to be incurred under the contract for its remaining term without economic benefit to the Company. Asset impairment charges related to intangible assets and property, plant and equipment reflect the excess of the assets’ carrying values over their fair values.

Revenue (sales) recognition: The Company sells a wide range of products to a diversified base of customers around the world and has no material concentration of credit risk. Revenue is recognized when the risks and rewards of ownership have substantively transferred to customers. This condition normally is met when the product has been delivered or upon performance of services. The Company records estimated reductions to revenue or records expense for customer and distributor incentives, primarily comprised of rebates and free goods, at the time of the initial sale. These sales incentives are accounted for in accordance with ASC 605, Revenue Recognition. The estimated reductions of revenue for rebates are based on the sales terms, historical experience, trend analysis and projected market conditions in the various markets served. Since the Company serves numerous markets, the rebate programs offered vary across businesses, but the most common incentive relates to amounts paid or credited to customers for achieving defined volume levels or growth objectives. Free goods are accounted for as an expense and recorded in cost of sales. Sales, use, value-added and other excise taxes are not recognized in revenue.

The vast majority of 3M’s sales agreements are for standard products and services with customer acceptance occurring upon delivery of the product or performance of the service. However, to a limited extent 3M also enters into agreements that involve multiple elements (such as equipment, installation and service), software, or non-standard terms and conditions.

For non-software multiple-element arrangements, the Company recognizes revenue for delivered elements when they have stand-alone value to the customer, they have been accepted by the customer, and for which there are only customary refund or return rights. Arrangement consideration is allocated to the deliverables by use of the relative selling price method. The selling price used for each deliverable is based on vendor-specific objective evidence (VSOE) if available, third-party evidence (TPE) if VSOE is not available, or estimated selling price if neither VSOE nor TPE is available. Estimated selling price is determined in a manner consistent with that used to establish the price to sell the deliverable on a standalone basis. In addition to the preceding conditions, equipment revenue is not recorded until the installation has been completed if equipment acceptance is dependent upon installation or if installation is essential to the functionality of the equipment. Installation revenues are not recorded until installation has been completed.

For arrangements (or portions of arrangements) falling within software revenue recognition standards and that do not involve significant production, modification, or customization, revenue for each software or software-related element is recognized when the Company has VSOE of the fair value of all of the undelivered elements and applicable criteria have been met for the delivered elements. When the arrangements involve significant production, modification or customization, long-term construction-type accounting involving proportional performance is generally employed.

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For prepaid service contracts, sales revenue is recognized on a straight-line basis over the term of the contract, unless historical evidence indicates the costs are incurred on other than a straight-line basis. License fee revenue is recognized as earned, and no revenue is recognized until the inception of the license term.

On occasion, agreements will contain milestones, or 3M will recognize revenue based on proportional performance. For these agreements, and depending on the specifics, 3M may recognize revenue upon completion of a substantive milestone, or in proportion to costs incurred to date compared with the estimate of total costs to be incurred.

Accounts receivable and allowances: Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for bad debts, cash discounts, product returns and various other items. The allowance for doubtful accounts and product returns is based on the best estimate of the amount of probable credit losses in existing accounts receivable and anticipated sales returns. The Company determines the allowances based on historical write-off experience by industry and regional economic data and historical sales returns. The Company reviews the allowance for doubtful accounts monthly. The Company does not have any significant off-balance-sheet credit exposure related to its customers.

Advertising and merchandising: These costs are charged to operations in the period incurred, and totaled $368 million in 2015, $407 million in 2014 and $423 million in 2013.

Research, development and related expenses: These costs are charged to operations in the period incurred and are shown on a separate line of the Consolidated Statement of Income. Research, development and related expenses totaled $1.763 billion in 2015, $1.770 billion in 2014 and $1.715 billion in 2013. Research and development expenses, covering basic scientific research and the application of scientific advances in the development of new and improved products and their uses, totaled $1.223 billion in 2015, $1.193 billion in 2014 and $1.150 billion in 2013. Related expenses primarily include technical support; internally developed patent costs, which include costs and fees incurred to prepare, file, secure and maintain patents; amortization of externally acquired patents and externally acquired in-process research and development; and gains/losses associated with certain corporate approved investments in R&D-related ventures, such as equity method effects and impairments.

Internal-use software: The Company capitalizes direct costs of services used in the development of internal-use software. Amounts capitalized are amortized over a period of three to seven years, generally on a straight-line basis, unless another systematic and rational basis is more representative of the software’s use. Amounts are reported as a component of either machinery and equipment or capital leases within property, plant and equipment.

Environmental: Environmental expenditures relating to existing conditions caused by past operations that do not contribute to current or future revenues are expensed. Reserves for liabilities related to anticipated remediation costs are recorded on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies, the Company’s commitment to a plan of action, or approval by regulatory agencies. Environmental expenditures for capital projects that contribute to current or future operations generally are capitalized and depreciated over their estimated useful lives.

Income taxes: The provision for income taxes is determined using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. The Company records a valuation allowance to reduce its deferred tax assets when uncertainty regarding their realizability exists. As of December 31, 2015 and 2014, the Company had valuation allowances of $31 million and $22 million on its deferred tax assets, respectively. The increase in valuation allowance at December 31, 2015 relates to current acquisitions in certain international jurisdictions. The Company recognizes and measures its uncertain tax positions based on the rules under ASC 740, Income Taxes.

Earnings per share: The difference in the weighted average 3M shares outstanding for calculating basic and diluted earnings per share attributable to 3M common shareholders is the result of the dilution associated with the Company’s stock-based compensation plans. Certain options outstanding under these stock-based compensation plans during the years 2015, 2014 and 2013 were not included in the computation of diluted earnings per share attributable to 3M common shareholders because they would not have had a dilutive effect (5.0 million average options for 2015, 1.4

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million average options for 2014, and 2.0 million average options for 2013). The computations for basic and diluted earnings per share for the years ended December 31 follow:

Earnings Per Share Computations

(Amounts in millions, except per share amounts)	2015		2014		2013
Numerator:
Net income attributable to 3M	$	4,833	$	4,956	$	4,659
Denominator:
Denominator for weighted average 3M common shares outstanding — basic		625.6		649.2		681.9
Dilution associated with the Company’s stock-based compensation plans		11.6		12.8		11.7
Denominator for weighted average 3M common shares outstanding — diluted		637.2		662.0		693.6
Earnings per share attributable to 3M common shareholders — basic	$	7.72	$	7.63	$	6.83
Earnings per share attributable to 3M common shareholders — diluted	$	7.58	$	7.49	$	6.72

Stock-based compensation: The Company recognizes compensation expense for its stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees’ Stock Purchase Plan (GESPP). Under applicable accounting standards, the fair value of share-based compensation is determined at the grant date and the recognition of the related expense is recorded over the period in which the share-based compensation vests. Refer to Note 15 for additional information.

Comprehensive income: Total comprehensive income and the components of accumulated other comprehensive income (loss) are presented in the Consolidated Statement of Comprehensive Income and the Consolidated Statement of Changes in Equity. Accumulated other comprehensive income (loss) is composed of foreign currency translation effects (including hedges of net investments in international companies), defined benefit pension and postretirement plan adjustments, unrealized gains and losses on available-for-sale debt and equity securities, and unrealized gains and losses on cash flow hedging instruments.

Derivatives and hedging activities: All derivative instruments within the scope of ASC 815, Derivatives and Hedging, are recorded on the balance sheet at fair value. The Company uses interest rate swaps, currency and commodity price swaps, and foreign currency forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity market volatility. All hedging instruments that qualify for hedge accounting are designated and effective as hedges, in accordance with U.S. generally accepted accounting principles. If the underlying hedged transaction ceases to exist, all changes in fair value of the related derivatives that have not been settled are recognized in current earnings. Instruments that do not qualify for hedge accounting are marked to market with changes recognized in current earnings. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the items subject to designated hedge or undesignated (economic) hedge relationships. The Company does not hold or issue derivative financial instruments for trading purposes and is not a party to leveraged derivatives.

Credit risk: The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company’s risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. The Company does not anticipate nonperformance by any of these counterparties. 3M has elected to present the fair value of derivative assets and

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liabilities within the Company’s consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation.

Fair value measurements: 3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Acquisitions: The Company accounts for business acquisitions in accordance with ASC 805, Business Combinations.  This standard requires the acquiring entity in a business combination to recognize all (and only) the assets acquired and liabilities assumed in the transaction and establishes the acquisition-date fair value as the measurement objective for all assets acquired and liabilities assumed in a business combination. Certain provisions of this standard prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.

New Accounting Pronouncements

In April 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changed the criteria for determining which disposals can be presented as discontinued operations and modified related disclosure requirements. This standard has the impact of reducing the frequency of disposals reported as discontinued operations, by requiring such a disposal to represent a strategic shift that has or will have a major effect on an entity’s operations and financial results. However, existing provisions that prohibited an entity from reporting a discontinued operation if it had certain continuing cash flows or involvement with the component after disposal were eliminated by this standard. The ASU also expands the disclosures for discontinued operations and requires new disclosures related to individually significant disposals that do not qualify as discontinued operations. For 3M, this ASU was effective prospectively beginning January 1, 2015. This ASU was applied to the 2015 divestiture information discussed in Note 2 and had no material impact on consolidated results of operations and financial condition.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, and in August 2015 issued ASU No. 2015-14, which amended ASU No. 2014-09 as to effective date. The ASU, as amended, provides a single comprehensive model to be used in the accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The standard’s stated core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this core principle the ASU includes provisions within a five step model that includes identifying the contract with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations, and recognizing revenue when (or as) an entity satisfies a performance obligation. The standard also specifies the accounting for some costs to obtain or fulfill a contract with a customer and requires expanded disclosures about revenue recognition. The standard provides for either full retrospective adoption or a modified retrospective adoption by which it is applied only to the most current period presented. For 3M, the ASU, as

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amended, is effective January 1, 2018. The Company is currently assessing this standard’s impact on 3M’s consolidated results of operations and financial condition.

In February 2015, the FASB issued ASU No. 2015-02, Amendments to the Consolidation Analysis, which changes guidance related to both the variable interest entity (VIE) and voting interest entity (VOE) consolidation models. With respect to the VIE model, the standard changes, among other things, the identification of variable interests associated with fees paid to a decision maker or service provider, the VIE characteristics for a limited partner or similar entity, and the primary beneficiary determination. With respect to the VOE model, the ASU eliminates the presumption that a general partner controls a limited partnership or similar entity unless the presumption can otherwise be overcome. Under the new guidance, a general partner would largely not consolidate a partnership or similar entity under the VOE model. For 3M, this ASU is effective January 1, 2016, with early adoption permitted. 3M does not have significant involvement with entities subject to consolidation considerations impacted by the VIE model changes or with limited partnerships potentially impacted by the VOE model changes. As a result, 3M does not expect this ASU to have a material impact on the Company’s consolidated results of operations and financial condition.

In April 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and in August 2015 issued ASU No. 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements. Under ASU 2015-03, debt issuance costs reported on the consolidated balance sheet would be reflected as a direct deduction from the related debt liability rather than as an asset. While ASU 2015-03 addresses costs related to term debt, ASU No. 2015-15 provides clarification regarding costs to secure revolving lines of credit, which are, at the outset, not associated with an outstanding borrowing. ASU No. 2015-15 provides commentary that the SEC staff would not object to an entity deferring and presenting costs associated with line-of-credit arrangements as an asset and subsequently amortizing them ratably over the term of the revolving debt arrangement. For 3M, ASU No. 2015-03 is effective January 1, 2016, with early adoption permitted. The Company adopted this ASU in the fourth quarter of 2015 with retrospective application to prior periods. As a result, debt issue costs aggregating $26 million previously included within Other Assets have been reflected as reductions in the balances of Long-Term Debt as of December 31, 2014.

In April 2015, the FASB issued ASU No. 2015-05, Customer’s Accounting for Fees Paid in a Cloud Arrangement, which requires a customer to determine whether a cloud computing arrangement contains a software license. If the arrangement contains a software license, the customer would account for fees related to the software license element in a manner consistent with accounting for the acquisition of other acquired software licenses. If the arrangement does not contain a software license, the customer would account for the arrangement as a service contract. An arrangement would contain a software license element if both (1) the customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty and (2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. For 3M, this ASU is effective January 1, 2016, with early adoption permitted. The standard provides for adoption either fully retrospectively or prospectively to arrangements entered into, or materially modified, after the effective date. The Company does not expect this ASU to have a material impact on 3M’s consolidated results of operations and financial condition.

In May 2015, the FASB issued ASU No. 2015-07, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). This standard modifies existing disclosure requirements such that investments for which the practical expedient is used to measure their fair value at net asset value (NAV) would be removed from the fair value hierarchy disclosures. Instead, an entity would be required to include those investments as a reconciling item such that the total fair value amount of investments in the fair value hierarchy disclosure is consistent with the amount on the balance sheet. Changes were also made to the requirements in a sponsor’s employee benefit plan asset disclosures. For 3M, this standard is effective January 1, 2016, with early adoption permitted. The Company adopted this ASU in the fourth quarter of 2015 with retrospective application to prior periods. As a result, Note 11, Pension and Postretirement Benefit Plans, reflects the modified disclosures with respect to applicable plan assets. As this ASU only relates to certain disclosures, it did not impact the Company’s consolidated results of operations and financial condition.

In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which modifies existing requirements regarding measuring inventory at the lower of cost or market. Under existing standards, the market amount requires consideration of replacement cost, net realizable value (NRV), and NRV less an approximately normal profit

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margin. The new ASU replaces market with NRV, defined as estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This eliminates the need to determine and consider replacement cost or NRV less an approximately normal profit margin when measuring inventory. For 3M, this standard is effective prospectively beginning January 1, 2017, with early adoption permitted. The Company is currently assessing this ASU’s impacts on 3M’s consolidated results of operations and financial condition.

In September 2015, the FASB issued ASU No. 2015-16, Simplifying the Accounting for Measurement-Period Adjustments, that eliminates the requirement for an acquirer in a business combination to account for measurement-period adjustments retrospectively. Under existing standards, an acquirer in a business combination reports provisional amounts with respect to acquired assets and liabilities when their measurements are incomplete as of the end of the reporting period. Prior to the impact of this ASU, an acquirer is required to adjust provisional amounts (and the related impact on earnings) by restating prior period financial statements during the measurement period which cannot exceed one year from the date of acquisition. The new guidance requires that the cumulative impact of a measurement-period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified—eliminating the requirement to restate prior period financial statements. The new standard requires disclosure of the nature and amount of measurement-period adjustments as well as information with respect to the portion of the adjustments recorded in current-period earnings that would have been recorded in previous reporting periods if the adjustments to provisional amounts had been recognized as of the acquisition date. The ASU is applied prospectively to measurement-period adjustments that occur after the effective date. For 3M, this standard is required prospectively beginning January 1, 2016, with early adoption permitted. The Company adopted this standard with respect to measurement-period adjustments beginning in the fourth quarter of 2015. Additional disclosure, as applicable, is included in Note 2, Acquisitions and Divestitures.

In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, which requires entities to present deferred tax assets (DTAs) and deferred tax liabilities (DTLs), along with any related valuation allowance, as noncurrent in a balance sheet. This ASU eliminates current guidance requiring deferred taxes for each jurisdiction to be presented as a net current asset or liability and a net noncurrent asset or liability. As a result, each jurisdiction would have one net noncurrent DTA or DTL balance. The ASU does not change the existing requirement that only permits offsetting DTAs and DTLs within a particular jurisdiction. For 3M, this standard is effective January 1, 2017, with early adoption permitted. In light of the process simplification provided by this ASU, the Company adopted this standard in the fourth quarter of 2015 with retrospective application to prior periods. As a result, the December 31, 2014 balances of DTAs and DTLs previously reported were impacted as follows:

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adopted
Prepaid expenses and other (within other current assets)	$	595	$	169	$	764
Other current tax assets (within other current assets)		444		(444)		—
Deferred tax assets (within other assets)		889		241		1,130
Deferred tax liabilities (within other current liabilities)		34		(34)		—

In conjunction with the adoption of this ASU, 3M reclassified $169 million of remaining other current tax assets to prepaid expenses and other to conform to the 2015 presentation.

In January 2016, the FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, which revises the accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. The ASU also amends certain disclosure requirements associated with the fair value of financial instruments. The new guidance requires the fair value measurement of investments in equity securities and other ownership interests in an entity, including investments in partnerships, unincorporated joint ventures and limited liability companies (collectively, equity securities) that do not result in consolidation and are not accounted for under the equity method. Entities will need to measure these investments and recognize changes in fair value in net income. Entities will no longer be able to recognize unrealized holding gains and losses on equity securities they classify under current guidance as available for sale in other comprehensive income (OCI). They also will no longer be able to use the cost method of accounting for equity securities that do not have readily determinable fair values. Instead, for these types of equity investments that do not otherwise qualify for the net asset value practical expedient, entities will be permitted to elect a practicability exception and

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measure the investment at cost less impairment plus or minus observable price changes (in orderly transactions). The ASU also establishes an incremental recognition and disclosure requirement related to the presentation of fair value changes of financial liabilities for which the fair value option (FVO) has been elected. Under this guidance, an entity would be required to separately present in OCI the portion of the total fair value change attributable to instrument-specific credit risk as opposed to reflecting the entire amount in earnings. For derivative liabilities for which the FVO has been elected, however, any changes in fair value attributable to instrument-specific credit risk would continue to be presented in net income, which is consistent with current guidance. For 3M, this standard is effective beginning January 1, 2018 via a cumulative-effect adjustment to beginning retained earnings, except for guidance relative to equity securities without readily determinable fair values which is applied prospectively. The Company is currently assessing this ASU’s impacts on 3M’s consolidated results of operations and financial condition.

NOTE 2.  Acquisitions and Divestitures

Acquisitions:

3M makes acquisitions of certain businesses from time to time that are aligned with its strategic intent with respect to, among other factors, growth markets and adjacent product lines or technologies.

The impact on the consolidated balance sheet of the purchase price allocations related to 2015 acquisitions and assigned weighted-average intangible asset lives, including adjustments relative to other acquisitions within the measurement period, follows.The allocation of purchase consideration related to the August 2015 Capital Safety and Polypore Separations Media acquisitions is considered preliminary, primarily with respect to certain tax-related assets and liabilities. 3M expects to finalize the allocation of purchase price within the one year measurement-period following these acquisitions. Adjustments to preliminary allocations primarily related to the identification and valuation of certain indefinite-lived intangible assets (further discussed below). The change to provisional amounts resulted in an immaterial impact to results of operations in the fourth quarter of 2015, a portion of which relates to earlier quarters in the measurement period.

	2015 Acquisition Activity
									Finite-Lived
									Intangible-Asset
(Millions)	Capital		Polypore						Weighted-Average
Asset (Liability)	Safety		Separations Media		Other		Total		Lives (Years)
Accounts receivable	$	66	$	30	$	7	$	103
Inventory		63		35		4		102
Other current assets		10		1		1		12
Property, plant, and equipment		36		128		7		171
Purchased finite-lived intangible assets:
Customer related intangible assets		445		270		40		755	16
Patents		44		11		7		62	7
Other technology-based intangible assets		85		42		1		128	7
Definite-lived tradenames		26		6		1		33	16
Other amortizable intangible assets		—		—		2		2	4
Purchased indefinite-lived intangible assets		520		—		—		520
Purchased goodwill		1,764		636		95		2,495
Accounts payable and other liabilities, net of other assets		(105)		(122)		(5)		(232)
Interest bearing debt		(766)		—		—		(766)
Deferred tax asset/(liability)		(464)		—		(7)		(471)
Net assets acquired	$	1,724	$	1,037	$	153	$	2,914
Supplemental information:
Cash paid	$	1,758	$	1,037	$	154	$	2,949
Less: Cash acquired		34		—		1		35
Cash paid, net of cash acquired	$	1,724	$	1,037	$	153	$	2,914

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3M completed one acquisition (Treo Solutions, LLC) during 2014, the impact of which on the consolidated balance sheet was not considered material. Separately, as discussed in Note 6, during 2014, 3M (via Sumitomo 3M Limited) purchased Sumitomo Electric Industries, Ltd.’s 25 percent interest in 3M’s consolidated Sumitomo 3M Limited subsidiary for 90 billion Japanese Yen. Because 3M already had a controlling interest in this consolidated subsidiary, this transaction was separately recorded as a financing activity in the statement of cash flows.

There were no acquisitions that closed during 2013.

Goodwill resulting from business combinations is largely attributable to the existing workforce of the acquired businesses and synergies expected to arise after 3M’s acquisition of these businesses. Pro forma information related to acquisitions was not included because the impact on the Company’s consolidated results of operations was not considered to be material.

In addition to business combinations, 3M periodically acquires certain tangible and/or intangible assets and purchases interests in certain enterprises that do not otherwise qualify for accounting as business combinations. These transactions are largely reflected as additional asset purchase and investment activity.

2015 acquisitions:

In March 2015, 3M (Health Care Business) purchased all of the outstanding shares of Ivera Medical Corp., headquartered in San Diego, California. Ivera Medical Corp. is a manufacturer of health care products that disinfect and protect devices used for access into a patient’s bloodstream. In addition, in the first quarter of 2015, 3M (Industrial Business) purchased the remaining interest in a former equity method investment for an immaterial amount.

In August 2015, 3M (Safety and Graphics Business) acquired all of the outstanding shares of Capital Safety Group S.A.R.L., with operating headquarters in Bloomington, Minnesota, from KKR & Co. L.P. for $1.7 billion, net of cash acquired. The net assets acquired included the assumption of $0.8 billion of debt. Capital Safety is a leading global provider of fall protection equipment.

In August 2015, 3M (Industrial Business) acquired the assets and liabilities associated with Polypore International, Inc.’s Separations Media business, headquartered in Wuppertal, Germany, for $1.0 billion. Polypore’s Separations Media business is a leading provider of microporous membranes and modules for filtration in the life sciences, industrial and specialty segments.

Purchased identifiable finite-lived intangible assets related to acquisition activity in 2015 totaled $1.0 billion. The associated finite-lived intangible assets acquired in 2015 will be amortized on a systematic and rational basis (generally straight line) over a weighted-average life of 14 years (lives ranging from two to 20 years). Indefinite-lived intangible assets of $520 million relate to certain tradenames associated with the Capital Safety acquisition which have been in existence for over 55 years, have a history of leading market-share positions, have been and are intended to be continuously renewed, and the associated products of which are expected to generate cash flows for 3M for an indefinite period of time. Acquired in-process research and development and identifiable intangible assets for which significant assumed renewals or extensions of underlying arrangements impacted the determination of their useful lives were not material.

2014 acquisitions:

During 2014, 3M completed one business combination. The purchase price paid for this business combination (net of cash acquired) and the impact of other matters (net) during 2014 aggregated to $94 million.

In April 2014, 3M (Health Care Business) purchased all of the outstanding equity interests of Treo Solutions LLC, headquartered in Troy, New York. Treo Solutions LLC is a provider of data analytics and business intelligence to healthcare payers and providers.

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Purchased identifiable finite-lived intangible assets related to acquisition activity in 2014 totaled $34 million. The associated finite-lived intangible assets acquired in 2014 will be amortized on a systematic and rational basis (generally straight line) over a weighted-average life of six years (lives ranging from three to 10 years). Acquired in-process research and development and identifiable intangible assets for which significant assumed renewals or extensions of underlying arrangements impacted the determination of their useful lives were not material.

Divestitures:

3M may divest certain businesses from time to time based upon review of the Company’s portfolio considering, among other items, factors relative to the extent of strategic and technological alignment and optimization of capital deployment, in addition to considering if selling the businesses results in the greatest value creation for the Company and for shareholders.

In January 2015, 3M (Electronics and Energy Business) completed the sale of its global Static Control business to Desco Industries Inc., based in Chino, California. 2014 sales of this business were $46 million. This transaction was not considered material.

In the fourth quarter of 2015, 3M (Safety and Graphics Business) entered into agreements with One Equity Partners Capital Advisors L.P. (OEP) to sell the assets of 3M’s library systems business. The sales of the North American business and the majority of the business outside of North America closed in October and November 2015, respectively. The sale of the remainder of the library systems business is expected to close in the first quarter of 2016. In December 2015, 3M (Safety and Graphics Business) also completed the sale of Faab Fabricauto, a wholly-owned subsidiary of 3M, to Hills Numberplates Limited. The library systems business, part of the Traffic Safety and Security Division, delivers circulation management solutions to library customers with on-premise hardware and software, maintenance and service, and an emerging cloud-based digital lending platform. Faab Fabricauto, also part of the Traffic Safety and Security Division, is a leading French manufacturer of license plates and signage solutions. The aggregate cash proceeds relative to the 2015 global library systems and Faab Fabricauto divestiture transactions was $104 million. The Company recorded a net pre-tax gain of $40 million (approximately $10 million after tax) in 2015 as a result of the sale and any adjustment of carrying value.

In January 2016, 3M (Industrial Business Group) entered into an agreement to sell to Innovative Chemical Products Group, a portfolio company of Audax Private Equity, the assets of 3M’s pressurized polyurethane foam adhesives business (formerly known as Polyfoam). This business is a provider of pressurized polyurethane foam adhesive formulations and systems into the residential roofing, commercial roofing and insulation and industrial foam segments in the United States with annual sales of approximately $20 million. The transaction is expected to close in the first quarter of 2016, subject to customary close conditions.

In June 2013, 3M (Consumer Business) completed the sale of its Scientific Anglers and Ross Reels businesses to The Orvis Company, Inc. based in Manchester, Vermont. This transaction was not considered material

The aggregate operating income of these businesses included in the Company’s operating results for the periods presented and the amounts of major assets and liabilities of any associated disposal groups classified as held-for-sale as of December 31, 2015 were not material.

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NOTE 3.  Goodwill and Intangible Assets

Purchased goodwill from acquisitions totaled $2.5 billion in 2015, $636 million of which is deductible for tax purposes. Purchased goodwill from acquisitions totaled $65 million in 2014, none of which is deductible for tax purposes.The amounts in the “Translation and other” column in the following table primarily relate to changes in foreign currency exchange rates. The goodwill balance by business segment follows:

Goodwill

	Dec. 31,		2014		2014		Dec. 31,		2015		2015		Dec. 31,
	2013		acquisition		translation		2014		acquisition		translation		2015
(Millions)	Balance		activity		and other		Balance		activity		and other		Balance
Industrial	$	2,166	$	—	$	(129)	$	2,037	$	637	$	(106)	$	2,568
Safety and Graphics		1,740		—		(90)		1,650		1,764		(72)		3,342
Health Care		1,596		65		(72)		1,589		94		(59)		1,624
Electronics and Energy		1,612		—		(53)		1,559		—		(44)		1,515
Consumer		231		—		(16)		215		—		(15)		200
Total Company	$	7,345	$	65	$	(360)	$	7,050	$	2,495	$	(296)	$	9,249

As described in Note 16, effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions. For any product moves that resulted in reporting unit changes, the Company applied the relative fair value method to determine the impact on goodwill of the associated reporting units. During the third quarter of 2015, the Company completed its assessment of any potential goodwill impairment for reporting units impacted by this new structure and determined that no impairment existed. The Company also completed its annual goodwill impairment test in the fourth quarter of 2015 for all reporting units and determined that no impairment existed. In addition, the Company had no impairments of goodwill in prior years.

Acquired Intangible Assets

For 2015, the intangible assets (excluding goodwill) acquired through business combinations increased the gross carrying amount. Balances are also impacted by changes in foreign currency exchange rates.The gross carrying amount and accumulated amortization of acquired intangible assets as of December 31, follow:

(Millions)	2015		2014
Customer related intangible assets	$	1,973	$	1,348
Patents		616		581
Other technology-based intangible assets		525		407
Definite-lived tradenames		421		401
Other amortizable intangible assets		216		221
Total gross carrying amount	$	3,751	$	2,958
Accumulated amortization — customer related		(668)		(597)
Accumulated amortization — patents		(481)		(472)
Accumulated amortization — other technology based		(252)		(215)
Accumulated amortization — definite-lived tradenames		(215)		(195)
Accumulated amortization — other		(169)		(167)
Total accumulated amortization	$	(1,785)	$	(1,646)
Total finite-lived intangible assets — net	$	1,966	$	1,312
Non-amortizable intangible assets (primarily tradenames)		635		123
Total intangible assets — net	$	2,601	$	1,435

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Certain tradenames acquired by 3M are not amortized because they have been in existence for over 55 years, have a history of leading-market share positions, have been and are intended to be continuously renewed, and the associated products of which are expected to generate cash flows for 3M for an indefinite period of time.

Amortization expense for the years ended December 31 follows:

(Millions)	2015		2014		2013
Amortization expense	$	229	$	228	$	236

Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2015 follows:

											After
(Millions)	2016		2017		2018		2019		2020		2020
Amortization expense	$	252	$	226	$	205	$	192	$	183	$	908

The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, changes in foreign currency exchange rates, impairment of intangible assets, accelerated amortization of intangible assets and other events. 3M expenses the costs incurred to renew or extend the term of intangible assets.

NOTE 4.  Restructuring Actions

2015 Restructuring Actions:

During the fourth quarter of 2015, management approved and committed to undertake certain restructuring actions primarily focused on structural overhead, largely in the U.S. and slower-growing markets, with particular emphasis on Europe, Middle East, and Africa (EMEA) and Latin America. This impacted approximately 1,700 positions worldwide and resulted in a fourth-quarter 2015 pre-tax charge of $114 million.

Components of these restructuring charges are summarized by business segment as follows:

	Year ended December 31, 2015
(Millions)	Employee-Related		Asset-Related		Total
Industrial	$	30	$	12	$	42
Safety and Graphics		11		—		11
Health Care		9		—		9
Electronics and Energy		8		4		12
Consumer		3		—		3
Corporate and Unallocated		37		—		37
Total Expense	$	98	$	16	$	114

The preceding restructuring charges were recorded in the income statement as follows:

(Millions)	2015
Cost of sales		40
Selling, general and administrative expenses		62
Research, development and related expenses		12
Total	$	114

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Components of these restructuring actions, including cash and non-cash impacts, follow:

	Year ended December 31, 2015
(Millions)	Employee-Related		Asset-Related		Total
Expense incurred	$	98	$	16	$	114
Non-cash changes		(8)		(16)		(24)
Cash payments		(27)		—		(27)
Accrued 2015 restructuring action balances as of December 31, 2015	$	63	$	—	$	63

Non-cash changes include certain pension settlements and special termination benefits recorded in accrued pension and postretirement benefits and accelerated deprecation resulting from the cessation of use of certain long-lived assets. Remaining activities related to the restructuring are expected to be completed in 2016.

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NOTE 5.  Supplemental Balance Sheet Information

Accounts payable (included as a separate line item in the Consolidated Balance Sheet) includes drafts payable on demand of $79 million at December 31, 2015, and $1 million at December 31, 2014. Accumulated depreciation for capital leases totaled $98 million and $87 million as of December 31, 2015, and 2014, respectively. Additional supplemental balance sheet information is provided in the table that follows.

(Millions)	2015		2014
Other current assets
Prepaid expenses and other	$	1,081	$	764
Derivative assets-current		211		182
Insurance related receivables, prepaid expenses and other		106		77
Total other current assets	$	1,398	$	1,023
Investments
Equity method	$	56	$	58
Cost method		59		41
Other investments		2		3
Total investments	$	117	$	102
Property, plant and equipment - at cost
Land	$	354	$	368
Buildings and leasehold improvements		7,120		6,943
Machinery and equipment		14,743		14,684
Construction in progress		723		679
Capital leases		158		167
Gross property, plant and equipment		23,098		22,841
Accumulated depreciation		(14,583)		(14,352)
Property, plant and equipment - net	$	8,515	$	8,489
Other assets
Deferred income taxes	$	510	$	1,130
Insurance related receivables and other		49		89
Cash surrender value of life insurance policies		241		245
Other		253		305
Total other assets	$	1,053	$	1,769
Other current liabilities
Accrued trade payables	$	566	$	533
Deferred income		518		541
Derivative liabilities		65		39
Dividends payable		—		648
Employee benefits and withholdings		148		172
Contingent liability claims and other		147		157
Property and other taxes		89		90
Pension and postretirement benefits		60		60
Other		811		644
Total other current liabilities	$	2,404	$	2,884
Other liabilities
Long term income taxes payable	$	154	$	519
Employee benefits		254		262
Contingent liability claims and other		295		300
Capital lease obligations		46		59
Deferred income		19		21
Deferred income taxes		551		141
Other		261		253
Total other liabilities	$	1,580	$	1,555

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NOTE 6.  Supplemental Equity and Comprehensive Income Information

Common stock ($.01 par value per share) of 3.0 billion shares is authorized, with 944,033,056 shares issued. Treasury stock is reported at cost, with 334,702,932 shares at December 31, 2015,  308,898,462 shares at December 31, 2014, and 280,736,817 shares at December 31, 2013. Preferred stock, without par value, of 10 million shares is authorized but unissued.

In 2015, 3M’s Board of Directors declared a second, third, and fourth quarter dividend of $1.025 per share, which resulted in total year 2015 declared dividends of $3.075 per share. In December 2014, 3M’s Board of Directors declared a first-quarter 2015 dividend of $1.025 per share (paid in March 2015), which when added to second, third and fourth quarter 2014 declared dividends of $0.855 per share, resulted in total year 2014 declared dividends of $3.59 per share. In December 2013, 3M’s Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (paid in March 2014). This resulted in total year 2013 declared dividends of $3.395 per share.

Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M by Component

			Defined Benefit		Debt and		Cash Flow		Accumulated
			Pension and		Equity		Hedging		Other
	Cumulative		Postretirement		Securities,		Instruments,		Comprehensive
	Translation		Plans		Unrealized		Unrealized		Income
(Millions)	Adjustment		Adjustment		Gain (Loss)		Gain (Loss)		(Loss)
Balance at December 31, 2012, net of tax:	$	230	$	(4,955)	$	(2)	$	(23)	$	(4,750)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(462)		1,361		—		(98)		801
Amounts reclassified out		—		569		—		122		691
Total other comprehensive income (loss), before tax		(462)		1,930		—		24		1,492
Tax effect		44		(690)		—		(9)		(655)
Total other comprehensive income (loss), net of tax		(418)		1,240		—		15		837
Balance at December 31, 2013, net of tax:	$	(188)	$	(3,715)	$	(2)	$	(8)	$	(3,913)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(856)		(2,638)		2		171		(3,321)
Amounts reclassified out		—		360		1		(4)		357
Total other comprehensive income (loss), before tax		(856)		(2,278)		3		167		(2,964)
Tax effect		(92)		716		(1)		(60)		563
Total other comprehensive income (loss), net of tax		(948)		(1,562)		2		107		(2,401)
Impact from purchase of subsidiary shares		41		(16)		—		—		25
Balance at December 31, 2014, net of tax	$	(1,095)	$	(5,293)	$	—	$	99	$	(6,289)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(447)		367		—		212		132
Amounts reclassified out		—		537		—		(174)		363
Total other comprehensive income (loss), before tax		(447)		904		—		38		495
Tax effect		(137)		(415)		—		(13)		(565)
Total other comprehensive income (loss), net of tax		(584)		489		—		25		(70)
Balance at December 31, 2015, net of tax:	$	(1,679)	$	(4,804)	$	—	$	124	$	(6,359)

Income taxes are not provided for foreign translation relating to permanent investments in international subsidiaries, but tax effects within cumulative translation does include impacts from items such as net investment hedge transactions. Reclassification adjustments are made to avoid double counting in comprehensive income items that are also recorded as part of net income.

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Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M

	Amounts Reclassified from
	Accumulated Other Comprehensive Income
(Millions)	Year ended		Year ended		Year ended
Details about Accumulated Other	December 31,		December 31,		December 31,		Location on Income
Comprehensive Income Components	2015		2014		2013		Statement
Gains (losses) associated with, defined benefit pension and postretirement plans amortization
Transition asset	$	1	$	1	$	1	See Note 11
Prior service benefit		79		59		77	See Note 11
Net actuarial loss		(626)		(420)		(647)	See Note 11
Curtailments/Settlements		9		—		—	See Note 11
Total before tax		(537)		(360)		(569)
Tax effect		176		122		197	Provision for income taxes
Net of tax	$	(361)	$	(238)	$	(372)
Debt and equity security gains (losses)
Sales or impairments of securities	$	—	$	(1)	$	—	Selling, general and administrative expenses
Total before tax		—		(1)		—
Tax effect		—		—		—	Provision for income taxes
Net of tax	$	—	$	(1)	$	—
Cash flow hedging instruments gains (losses)
Foreign currency forward/option contracts	$	178	$	3	$	(11)	Cost of sales
Foreign currency forward contracts		—		—		(108)	Interest expense
Commodity price swap contracts		(2)		2		(2)	Cost of sales
Interest rate swap contracts		(2)		(1)		(1)	Interest expense
Total before tax		174		4		(122)
Tax effect		(63)		(1)		45	Provision for income taxes
Net of tax	$	111	$	3	$	(77)
Total reclassifications for the period, net of tax	$	(250)	$	(236)	$	(449)

Purchase and Sale of Subsidiary Shares

On September 1, 2014, 3M (via Sumitomo 3M Limited) purchased Sumitomo Electric Industries, Ltd.’s 25 percent interest in 3M’s consolidated Sumitomo 3M Limited subsidiary for 90 billion Japanese Yen. Upon completion of the transaction, 3M owned 100 percent of Sumitomo 3M Limited. This transaction was recorded as a financing activity (Purchase of noncontrolling interest) in the statement of cash flows.

In April 2014, 3M purchased the remaining noncontrolling interest in a consolidated 3M subsidiary for an immaterial amount, which was classified as a financing activity (Purchase of noncontrolling interest) in the consolidated statement of cash flows.

The following table summarizes the effects of these 2014 transactions on equity attributable to 3M Company shareholders:

	Year ended
(Millions)	December 31, 2014
Net income attributable to 3M	$	4,956
Impact of purchase of subsidiary shares		(409)
Change in 3M Company shareholders’ equity from net income
attributable to 3M and impact of purchase of subsidiary shares	$	4,547

In March 2013, 3M sold shares in 3M India Limited, a subsidiary of the Company, in return for $8 million. The noncontrolling interest shares of this subsidiary trade on a public exchange in India. This sale of shares complied with an amendment to Indian securities regulations that required 3M India Limited, as a listed company, to achieve a minimum public shareholding of at least 25 percent. As a result of this transaction, 3M’s ownership in 3M India Limited was reduced from 76 percent to 75 percent. The $8 million received in the first quarter of 2013 was classified as other financing activity in the consolidated statement of cash flows. Because the Company retained its controlling interest, the

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sale resulted in an increase in 3M Company shareholder’s equity of $7 million and an increase in noncontrolling interest of $1 million.

NOTE 7.  Supplemental Cash Flow Information

(Millions)	2015		2014		2013
Cash income tax payments, net of refunds	$	2,331	$	1,968	$	1,803
Cash interest payments		134		178		169
Capitalized interest		13		15		21

Cash interest payments include interest paid on debt and capital lease balances, including net interest payments/receipts related to accreted debt discounts/premiums, payment of debt issue costs, as well as net interest payments/receipts associated with interest rate swap contracts.

Individual amounts in the Consolidated Statement of Cash Flows exclude the impacts of acquisitions, divestitures and exchange rate impacts, which are presented separately.

Transactions related to investing and financing activities with significant non-cash components are as follows:

· During the fourth quarter of 2014, 3M sold and leased-back, under a capital lease, certain recently constructed machinery and equipment in return for a municipal bond with the City of Nevada, Missouri valued at approximately $15 million as of the transaction date.

· During the third quarter of 2013, 3M sold its equity interest in a non-strategic investment in exchange for a note receivable of approximately $24 million, which is considered non-cash investing activity. As a result of this transaction, in the third quarter of 2013, 3M recorded a pre-tax gain of $18 million in its Health Care business segment. In October 2013, cash was received for the note receivable and is reflected in other investing activity in the consolidated statement of cash flows for the year ended December 31, 2013.

· During the second quarter of 2013, the Company’s Sumitomo 3M Limited subsidiary moved its administrative headquarters to a new leased location and sold the former site under an installment sale arrangement. As a result, at the time of the closing of the sale transaction, the Company received certain cash proceeds (included in proceeds from sale of property, plant and equipment in the consolidated statement of cash flows) and recorded a note receivable (due in quarterly installments through the first quarter of 2016) of $78 million and deferred profit of $49 million (both based on the foreign currency exchange rate at the time of closing). Remaining quarterly installments are due through the first quarter of 2016 and will be included in other investing activities in the consolidated statement of cash flows. Deferred profit is reduced and recognized into income in connection with such quarterly installments.

In addition, as discussed in Note 6, in the fourth quarter of 2014, 3M’s Board of Directors declared a first-quarter 2015 dividend of $1.025 per share (paid in March 2015), which reduced 3M’s stockholders equity and increased other current liabilities as of December 2014 by $648 million. In the fourth quarter of 2013, 3M’s Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (paid in March 2014). This reduced 3M’s stockholders equity and increased other current liabilities as of December 31, 2013 by $567 million.

NOTE 8.  Income Taxes

Income Before Income Taxes

(Millions)	2015		2014		2013
United States	$	4,399	$	3,815	$	3,194
International		2,424		3,211		3,368
Total	$	6,823	$	7,026	$	6,562

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Provision for Income Taxes

(Millions)	2015		2014		2013
Currently payable
Federal	$	1,338	$	1,103	$	948
State		101		108		91
International		566		1,008		901
Deferred
Federal		(55)		(171)		(123)
State		6		(9)		(2)
International		26		(11)		26
Total	$	1,982	$	2,028	$	1,841

Components of Deferred Tax Assets and Liabilities

(Millions)	2015		2014
Deferred tax assets:
Accruals not currently deductible
Employee benefit costs	$	175	$	148
Product and other claims		146		152
Miscellaneous accruals		114		137
Pension costs		1,120		1,312
Stock-based compensation		305		290
Net operating/capital loss carryforwards		109		175
Foreign tax credits		25		360
Inventory		46		52
Other		—		30
Gross deferred tax assets		2,040		2,656
Valuation allowance		(31)		(22)
Total deferred tax assets	$	2,009	$	2,634
Deferred tax liabilities:
Product and other insurance receivables	$	(28)	$	(31)
Accelerated depreciation		(736)		(804)
Intangible amortization		(1,017)		(719)
Currency translation		(199)		(91)
Other		(70)		—
Total deferred tax liabilities	$	(2,050)	$	(1,645)
Net deferred tax assets (liabilities)	$	(41)	$	989

The net deferred tax assets are included as components of Other Assets and Other Liabilities within the Consolidated Balance Sheet. See Note 5 “Supplemental Balance Sheet Information” for further details.

As of December 31, 2015, the Company had tax effected operating losses, capital losses, and tax credit carryovers for federal (approximately $31 million), state (approximately $2 million), and international (approximately $76 million), with all amounts before valuation allowances. The federal tax attribute carryovers will expire after 15 to 20 years, the state after five to 10 years, and the majority of international after four years with the remaining international expiring in one year or with an indefinite carryover period. The tax attributes being carried over arise as certain jurisdictions may have tax losses or may have inabilities to utilize certain losses without the same type of taxable income. As of December 31, 2015, the Company has provided $31 million of valuation allowance against certain of these deferred tax assets based on management’s determination that it is more-likely-than-not that the tax benefits related to these assets will not be realized.

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Reconciliation of Effective Income Tax Rate

	2015		2014		2013
Statutory U.S. tax rate	35.0	%	35.0	%	35.0	%
State income taxes - net of federal benefit	1.1		0.9		0.9
International income taxes - net	(3.8)		(5.8)		(6.3)
U.S. research and development credit	(0.5)		(0.4)		(0.7)
Reserves for tax contingencies	(1.0)		0.6		1.2
Domestic Manufacturer’s deduction	(1.8)		(1.3)		(1.6)
All other - net	0.1		(0.1)		(0.4)
Effective worldwide tax rate	29.1	%	28.9	%	28.1	%

The effective tax rate for 2015 was 29.1 percent, compared to 28.9 percent in 2014, an increase of 0.2 percentage points, impacted by several factors. Factors which increased the Company’s effective tax rate included international taxes, which were impacted by changes in foreign currency rates and changes to the geographic mix of income before taxes, and other items. Combined, these factors increased the Company’s effective tax rate by 2.4 percentage points. This increase was partially offset by a 2.2 percentage point decrease, which related to the remeasurements of 3M’s uncertain tax positions, including the restoration of tax basis on certain assets for which depreciation deductions were previously limited, and increases in the domestic manufacturer’s deduction and U.S. research and development credit benefits.

The effective tax rate for 2014 was 28.9 percent, compared to 28.1 percent in 2013, an increase of 0.8 percentage points, impacted by many factors. Factors which increased the Company’s effective tax rate included a one-time international tax impact related to the establishment of the supply chain center of expertise in Europe, decreased U.S. research and development credit in 2014 compared to 2013 due to two years inclusion as a result of the reinstatement in 2013, decreased domestic manufacturer’s deduction, and other items. Combined, these factors increased the Company’s effective tax rate by 1.6 percentage points. This increase was partially offset by a 0.8 percentage point decrease, which related to both lower 3M income tax reserves for 2014 when compared to 2013 and international taxes as a result of changes to the geographic mix of income before taxes.

The Company files income tax returns in the U.S. federal jurisdiction, and various states and foreign jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2005.

The IRS has completed its field examination of the Company’s U.S. federal income tax returns for the years 2005 through 2013. The Company protested certain IRS positions within these tax years and entered into the administrative appeals process with the IRS. In December 2012, the Company received a statutory notice of deficiency for the 2006 year. The Company filed a petition in Tax Court in the first quarter of 2013 relating to the 2006 tax year. Currently, the Company is under examination by the IRS for its U.S. federal income tax returns for the years 2014 and 2015. It is anticipated that the IRS will complete its examination of the Company for 2014 by the end of the first quarter of 2016 and for 2015 by the end of the first quarter of 2017. As of December 31, 2015, the IRS has not proposed any significant adjustments to the Company’s tax positions for which the Company is not adequately reserved.

Payments relating to other proposed assessments arising from the 2005 through 2015 examinations may not be made until a final agreement is reached between the Company and the IRS on such assessments or upon a final resolution resulting from the administrative appeals process or judicial action. In addition to the U.S. federal examination, there is also audit activity in several U.S. state and foreign jurisdictions.

3M anticipates changes to the Company’s uncertain tax positions due to the closing and resolution of audit issues for various audit years mentioned above and closure of statutes. The Company is not currently able to reasonably estimate the amount by which the liability for unrecognized tax benefits will increase or decrease during the next 12 months as a result of the ongoing income tax authority examinations.

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A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (UTB) is as follows:

Federal, State and Foreign Tax

(Millions)	2015		2014		2013
Gross UTB Balance at January 1	$	583	$	659	$	528
Additions based on tax positions related to the current year		77		201		97
Additions for tax positions of prior years		140		30		158
Reductions for tax positions of prior years		(399)		(74)		(29)
Settlements		(4)		(154)		(17)
Reductions due to lapse of applicable statute of limitations		(16)		(79)		(78)
Gross UTB Balance at December 31	$	381	$	583	$	659
Net UTB impacting the effective tax rate at December 31	$	369	$	265	$	262

The total amount of UTB, if recognized, would affect the effective tax rate by $369 million as of December 31, 2015, $265 million as of December 31, 2014, and $262 million as of December 31, 2013. The ending net UTB results from adjusting the gross balance for items such as Federal, State, and non-U.S. deferred items, interest and penalties, and deductible taxes. The net UTB is included as components of Other Assets, Accrued Income Taxes, and Other Liabilities within the Consolidated Balance Sheet.

The Company recognizes interest and penalties accrued related to unrecognized tax benefits in tax expense. The Company recognized in the consolidated statement of income on a gross basis approximately $2 million of expense, $14 million of benefit, and $22 million of expense in 2015, 2014, and 2013, respectively. The amount of interest and penalties recognized may be an expense or benefit due to new or remeasured unrecognized tax benefit accruals. At December 31, 2015, and December 31, 2014, accrued interest and penalties in the consolidated balance sheet on a gross basis were $45 million and $44 million, respectively. Included in these interest and penalty amounts are interest and penalties related to tax positions for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility. Because of the impact of deferred tax accounting, other than interest and penalties, the disallowance of the shorter deductibility period would not affect the annual effective tax rate but would accelerate the payment of cash to the taxing authority to an earlier period.

As a result of certain employment commitments and capital investments made by 3M, income from certain manufacturing activities in the following countries is subject to reduced tax rates or, in some cases, is exempt from tax for years through the following: Taiwan (2015), China (2016), Korea (2018), Brazil (2023), Switzerland (2024), and Singapore (2025). The income tax benefits attributable to the tax status of these subsidiaries are estimated to be $114 million (18 cents per diluted share) in 2015, $99 million (15 cents per diluted share) in 2014, and $87 million (13 cents per diluted share) in 2013.

The Company has not provided deferred taxes on unremitted earnings attributable to international companies that have been considered to be reinvested indefinitely, with the exception of an acquired entity. These earnings relate to ongoing operations and were approximately $12 billion as of December 31, 2015. Because of the availability of U.S. foreign tax credits, the multiple avenues in which to repatriate the earnings to minimize tax cost, and because a large portion of these earnings are not liquid, it is not practical to determine the income tax liability that would be payable if such earnings were not reinvested indefinitely.

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NOTE 9.  Marketable Securities

The Company invests in agency securities, corporate securities, asset-backed securities and other securities. The following is a summary of amounts recorded on the Consolidated Balance Sheet for marketable securities (current and non-current).

	December 31,		December 31,
(Millions)	2015		2014
U.S. government agency securities	$	—	$	108
Foreign government agency securities		10		95
Corporate debt securities		10		619
Commercial paper		12		—
Certificates of deposit/time deposits		26		41
U.S. treasury securities		—		38
U.S. municipal securities		3		—
Asset-backed securities:
Automobile loan related		26		282
Credit card related		10		162
Equipment lease related		2		48
Other		19		46
Asset-backed securities total		57		538
Current marketable securities	$	118	$	1,439
U.S. municipal securities	$	9	$	15
Non-current marketable securities	$	9	$	15
Total marketable securities	$	127	$	1,454

Classification of marketable securities as current or non-current is based on the nature of the securities and availability for use in current operations.At December 31, 2015 and 2014, gross unrealized gains and/or losses (pre-tax) were not material. Refer to Note 6 for a table that provides the net realized gains (losses) related to sales or impairments of debt and equity securities, which includes marketable securities. The gross amounts of the realized gains or losses were not material. Cost of securities sold use the first in, first out (FIFO) method. Since these marketable securities are classified as available-for-sale securities, changes in fair value will flow through other comprehensive income, with amounts reclassified out of other comprehensive income into earnings upon sale or “other-than-temporary” impairment.

3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders’ equity. Such an unrealized loss does not reduce net income attributable to 3M for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.

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The balance at December 31, 2015, for marketable securities by contractual maturity are shown below. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.

(Millions)	December 31, 2015
Due in one year or less	$	52
Due after one year through five years		74
Due after five years through ten years		1
Due after ten years		—
Total marketable securities	$	127

3M has a diversified marketable securities portfolio of $127million as of December 31, 2015. Within this portfolio, current asset-backed securities (estimated fair value of $57 million) primarily include interests in automobile loans, credit cards and equipment leases. 3M’s investment policy allows investments in asset-backed securities with minimum credit ratings of Aa2 by Moody’s Investors Service or AA by Standard & Poor’s or Fitch Ratings or DBRS. Asset-backed securities must be rated by at least two of the aforementioned rating agencies, one of which must be Moody’s Investors Service or Standard & Poor’s. At December 31, 2015, all asset-backed security investments were in compliance with this policy. Approximately 75.8 percent of all asset-backed security investments were rated AAA or A-1+ by Standard & Poor’s and/or Aaa or P-1 by Moody’s Investors Service and/or AAA or F1+ by Fitch Ratings. Interest rate risk and credit risk related to the underlying collateral may impact the value of investments in asset-backed securities, while factors such as general conditions in the overall credit market and the nature of the underlying collateral may affect the liquidity of investments in asset-backed securities. 3M does not currently expect risk related to its holding in asset-backed securities to materially impact its financial condition or liquidity.

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NOTE 10.  Long-Term Debt and Short-Term Borrowings

The following debt tables reflect effective interest rates, which include the impact of interest rate swaps, as of December 31, 2015. If the debt was issued on a combined basis, the debt has been separated to show the impact of the fixed versus floating effective interest rates. Carrying value includes the impact of debt issuance costs and fair value hedging activity. Long-term debt and short-term borrowings as of December 31 consisted of the following:

Long-Term Debt

	Currency/	Effective		Final
(Millions)	Fixed vs.	Interest		Maturity	Carrying Value
Description / 2015 Principal Amount	Floating	Rate		Date	2015		2014
Medium-term note ($1 billion)	USD Fixed	1.62	%	2016	$	999	$	996
Medium-term note ($650 million)	USD Fixed	1.10	%	2017		648		647
Medium-term note (500 million Euros)	Euro Floating	0.16	%	2018		545		606
Medium-term note ($450 million)	USD Floating	0.44	%	2018		448		—
Medium-term note ($600 million)	USD Floating	0.55	%	2019		597		592
Medium-term note ($25 million)	USD Fixed	1.74	%	2019		25		25
Medium-term note (650 million Euros)	Euro Floating	0.15	%	2020		708		—
Medium-term note ($300 million)	USD Floating	0.61	%	2020		297		—
Medium-term note ($200 million)	USD Fixed	2.12	%	2020		198		—
Eurobond (300 million Euros)	Euro Floating	0.21	%	2021		348		389
Eurobond (300 million Euros)	Euro Fixed	1.97	%	2021		326		361
Medium-term note ($600 million)	USD Fixed	2.17	%	2022		592		591
Medium-term note (600 million Euros)	Euro Fixed	1.14	%	2023		644		—
Medium-term note ($550 million)	USD Fixed	3.04	%	2025		545		—
Medium-term note (750 million Euros)	Euro Fixed	1.71	%	2026		801		892
30-year debenture ($330 million)	USD Fixed	6.01	%	2028		343		344
Medium-term note (500 million Euros)	Euro Fixed	1.90	%	2030		533		—
30-year bond ($750 million)	USD Fixed	5.73	%	2037		743		742
Floating rate note ($96 million)	USD Floating	0.22	%	2041		96		96
Medium-term note ($325 million)	USD Fixed	4.05	%	2044		313		312
Floating rate note ($55 million)	USD Floating	0.16	%	2044		55		55
Other borrowings	Various	0.22	%	2016-2040		74		112
Total long-term debt					$	9,878	$	6,760
Less: current portion of long-term debt						1,125		55
Long-term debt (excluding current portion)					$	8,753	$	6,705

Post-Swap Borrowing (Long-Term Debt, Including Current Portion)

	2015				2014
	Carrying		Effective		Carrying		Effective
(Millions)	Value		Interest Rate		Value		Interest Rate
Fixed-rate debt	$	6,712	2.54	%	$	4,911	2.74	%
Floating-rate debt		3,166	0.32	%		1,849	0.53	%
Total long-term debt, including current portion	$	9,878			$	6,760

Short-Term Borrowings and Current Portion of Long-Term Debt

	Effective		Carrying Value
(Millions)	Interest Rate		2015		2014
Current portion of long-term debt	1.45	%	$	1,125	$	55
U.S. dollar commercial paper	—	%		—		—
Other borrowings	1.01	%		919		51
Total short-term borrowings and current portion of long-term debt			$	2,044	$	106

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In 2015, other short-term borrowings primarily consisted of bank borrowings by international subsidiaries, primarily Japan and Korea.

Maturities of Long-term Debt

Maturities of long-term debt for the five years subsequent of December 31, 2015 are as follows (in millions):

										After
2016		2017		2018		2019		2020		2020		Total
$	1,125	$	744	$	993	$	622	$	1,203	$	5,191	$	9,878

Long-term debt payments due in 2016 and 2017 include floating rate notes totaling $126 million (classified as current portion of long-term debt), and $96 million (included as a separate floating rate note in the long-term debt table), respectively, as a result of put provisions associated with these debt instruments.

Credit Facilities

In August 2014, 3M amended and extended its existing $1.5 billion five-year revolving credit facility to a $2.25 billion five-year agreement expiring in August 2019. This credit agreement includes a provision under which 3M may request an increase of up to $2.25 billion, bringing the total facility up to $4.5 billion (at the lender’s discretion). This facility was undrawn at December 31, 2015. Under the $2.25 billion credit agreement, the Company is required to maintain its EBITDA to Interest Ratio as of the end of each fiscal quarter at not less than 3.0 to 1. This is calculated (as defined in the agreement) as the ratio of consolidated total EBITDA for the four consecutive quarters then ended to total interest expense on all funded debt for the same period. At December 31, 2015, this ratio was approximately 56 to 1. Debt covenants do not restrict the payment of dividends.

Other Credit Facilities

Apart from the committed revolving facility, an additional $241 million in stand-alone letters of credit and $18 million in bank guarantees were also issued and outstanding at December 31, 2015. These lines of credit are utilized in connection with normal business activities.

Long-Term Debt Issuances

The principal amounts, interest rates and maturity dates of individual long-term debt issuances can be found in the long-term debt table found at the beginning of this note.

In May 2015, 3M issued 1.750 billion Euros aggregate principal amount of medium term notes. In August 2015, 3M issued $1.500 billion aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into two interest rate swaps as fair value hedges of a portion of the fixed interest rate medium-term note obligation. The first converted a $450 million three-year fixed rate note, and the second converted $300 million of a five-year fixed rate note included in this issuance to an interest rate based on a floating three-month LIBOR index.

In June 2014, 3M issued $950 million aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into an interest rate swap to convert $600 million of a $625 million note included in this issuance to an interest rate based on a floating three-month LIBOR index as a fair value hedge of a portion of the fixed interest rate medium-term note obligation. In November 2014, the Company issued 1.250 billion Euros aggregate principal amount of medium-term notes.

In November 2013, 3M issued a Eurobond for an amount of 600 million Euros. Upon debt issuance, 3M completed a fixed-to-floating interest rate swap on a notional amount of 300 million Euros.

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Long-Term Debt Maturities

In July 2014, 3M retired at maturity 1.025 billion Euros of seven-year 5.0% fixed rate Eurobonds. In December 2012, 3M entered into a three-year 66 million British Pound (approximately $106 million based on agreement date exchange rates) committed credit facility agreement with JP Morgan Chase Bank, which was fully drawn as of December 31, 2012. 3M repaid the balance in 2014.

In August 2013, 3M repaid $850 million (principal amount) of medium-term notes.

Floating Rate Notes

At various times, 3M has issued floating rate notes containing put provisions. 3M would be required to repurchase these securities at various prices ranging from 99 percent to 100 percent of par value according to the reduction schedules for each security. In December 2004, 3M issued a forty-year $60 million floating rate note, with a rate based on a floating LIBOR index. Under the terms of this floating rate note due in 2044, holders have an annual put feature at 100 percent of par value from 2014 and every anniversary thereafter until final maturity. Under the terms of the floating rate notes due in 2027, 2040 and 2041, holders have put options that commence ten years from the date of issuance and each third anniversary thereafter until final maturity at prices ranging from 99 percent to 100 percent of par value. In 2008 through 2015, 3M was required to repurchase an immaterial amount of principal on the aforementioned floating rate notes.

NOTE 11.  Pension and Postretirement Benefit Plans

3M has company-sponsored retirement plans covering substantially all U.S. employees and many employees outside the United States. In total, 3M has over 80 defined benefit plans in 28 countries. Pension benefits associated with these plans generally are based on each participant’s years of service, compensation, and age at retirement or termination. The primary U.S. defined-benefit pension plan was closed to new participants effective January 1, 2009. The Company also provides certain postretirement health care and life insurance benefits for substantially all of its U.S. employees who reach retirement age while employed by the Company. Most international employees and retirees are covered by government health care programs. The cost of company-provided postretirement health care plans for international employees is not material and is combined with U.S. amounts in the tables that follow.

The Company also sponsors employee savings plans under Section 401(k) of the Internal Revenue Code. These plans are offered to substantially all regular U.S. employees. For eligible employees hired prior to January 1, 2009, employee 401(k) contributions of up to 6% of eligible compensation were matched in cash at rates of 60% or 75%, depending on the plan in which the employee participates. Employees hired on or after January 1, 2009, received a cash match of 100% for employee 401(k) contributions of up to 6% of eligible compensation and also received an employer retirement income account cash contribution of 3% of the participant’s total eligible compensation. Beginning on January 1, 2016, for U.S. employees, the Company reduced its match on employee 401(k) contributions. For eligible employees hired prior to January 1, 2009, employee 401(k) contributions of up to 5% of eligible compensation will be matched in cash at rates of 45% or 60%, depending on the plan in which the employee participates. Employees hired on or after January 1, 2009, will receive a cash match of 100% for employee 401(k) contributions of up to 5% of eligible compensation and will also continue to receive an employer retirement income account cash contribution of 3% of the participant’s total eligible compensation. All contributions are invested in a number of investment funds pursuant to the employees’ elections. Employer contributions to the U.S. defined contribution plans were $165 million, $153 million and $136 million for 2015, 2014 and 2013, respectively. 3M subsidiaries in various international countries also participate in defined contribution plans. Employer contributions to the international defined contribution plans were $77 million, $75 million and $71 million for 2015, 2014 and 2013, respectively.

The Company has made deposits for its defined benefit plans with independent trustees. Trust funds and deposits with insurance companies are maintained to provide pension benefits to plan participants and their beneficiaries. There are no plan assets in the non-qualified plan due to its nature. For its U.S. postretirement health care and life insurance benefit plans, the Company has set aside amounts at least equal to annual benefit payments with an independent trustee.

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3M’s primary U.S. qualified defined benefit plan does not have a mandatory cash contribution because the Company has a significant credit balance from previous discretionary contributions that can be applied to any Pension Protection Act funding requirements.

As a result of changes made to its U.S. postretirement health care benefit plans in 2010, the Company has transitioned all current and future retirees to a savings account benefits-based plan. These changes became effective beginning January 1, 2013, for all Medicare eligible retirees and their Medicare eligible dependents and became effective beginning January 1, 2016, for all non-Medicare eligible retirees and their eligible dependents.In August 2015, 3M modified the 3M Retiree Welfare Benefit Plan postretirement medical benefit reducing the future benefit for participants not retired as of January 1, 2016. For participants retiring after January 1, 2016, the Retiree Medical Savings Account (RMSA) is no longer credited with interest and the indexation on both the RMSA and the Medicare Health Reimbursement Arrangement is reduced from 3 percent to 1.5 percent per year (for those employees who are eligible for these accounts). Also effective January 1, 2016, 3M no longer offers 3M Retiree Health Care Accounts to new hires. Due to these changes the plan was re-measured in the third quarter of 2015, resulting in a decrease to the projected benefit obligation liability of approximately $233 million, and a related increase to shareholders’ equity, specifically accumulated other comprehensive income.

In the third quarter of 2014, former U.S. employees who have a pension benefit for which they have not begun receiving payment (term vested) were offered a lump sum payout of their pension benefit. As a result of this action, the projected benefit obligation (PBO) liability was reduced in the fourth quarter of 2014 by approximately $270 million, with the actual cash payout of approximately the same amount paid from the plan’s assets in the fourth quarter of 2014. The PBO liability reduction was 34% of the term vested eligible PBO and a 2% reduction in the overall U.S. pension PBO liability based on the December 31, 2013, valuation. There was no pension expense impact as a result of this action on 3M’s consolidated statement of income in 2014.

In the fourth quarter of 2014, 3M’s Board of Directors approved an amendment of the U.S. defined benefit pension plan to include a lump sum payment option for employees that have vested retirement benefits who commence their pension January 1, 2015, or later. This option is also available to vested employees who leave 3M before becoming eligible to retire at the time of termination. This change reduced 3M’s year-end 2014 U.S.pension PBO liability by approximately $266 million.

As of December 31, 2014, the Company converted to the “RP 2014 Mortality Tables” and updated the mortality improvement scale it used for calculating the year-end 2014 U.S. defined benefit pension annuitant and postretirement obligations and 2015 expense. The impact of this change increased the year-end 2014 U.S. pension PBO by approximately $820 million and the U.S. accumulated postretirement benefit obligation by approximately $100 million.

In March 2015, 3M Japan modified the Japan Limited Defined Benefit Corporate Pension Plan (DBCPP). Beginning July 1, 2015, eligible employees receive a company provided contribution match of 6.12% of their eligible salary to their defined contribution plan. Employees no longer earn additional service towards their defined benefit pension plans after July 1, 2015, except for eligible salaries above the statutory defined contribution limits. As a result of this plan modification, the Company re-measured the DBCPP, which resulted in a $17 million pre-tax curtailment gain for the year ending December 31, 2015. In March2015, 3M also received a favorable Internal Revenue Service tax determination letterto terminate a frozen defined benefit pension plan of one of 3M’s acquired subsidiaries. By the end of 2015, thisplan made final distributions of$16 million to participants.The Company also had other settlements, curtailments, special termination benefits and other items in 2015 aggregating to the amounts indicated in these components in the applicable tables that follow.

3M was informed during the first quarter of 2009, that the general partners of WG Trading Company, in which 3M’s benefit plans hold limited partnership interests, are the subject of a criminal investigation as well as civil proceedings by the SEC and CFTC (Commodity Futures Trading Commission). In March 2011, over the objections of 3M and six other limited partners of WG Trading Company, the district court judge ruled in favor of the court appointed receiver’s proposed distribution plan (and in April 2013, the United States Court of Appeals for the Second Circuit affirmed the district court’s ruling). The benefit plan trustee holdings of WG Trading Company interests were adjusted to reflect the decreased estimated fair market value, inclusive of estimated insurance proceeds, as of the annual measurement dates.

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The Company has insurance that it believes, based on what is currently known, will result in the probable recovery of a portion of the decrease in original asset value. In the first quarter of 2014, 3M and certain 3M benefit plans filed a lawsuit in the U.S. District Court for the District of Minnesota against five insurers seeking insurance coverage for the WG Trading Company claim. In September 2015, the court ruled in favor of the defendant insurance companies on a motion for summary judgment and dismissed the lawsuit. In October 2015, 3M and the 3M benefit plans filed a notice of appeal to the United States Court of Appeals for the Eighth Circuit. As of the 2015 measurement date, these holdings represented less than one half of one percent of 3M’s fair value of total plan assets. 3M currently believes that the resolution of these events will not have a material adverse effect on the consolidated financial position of the Company.

The following tables include a reconciliation of the beginning and ending balances of the benefit obligation and the fair value of plan assets as well as a summary of the related amounts recognized in the Company’s consolidated balance sheet as of December 31 of the respective years. 3M also has certain non-qualified unfunded pension and postretirement benefit plans, inclusive of plans related to supplement/excess benefits for employees impacted by particular relocations and other matters, that individually and in the aggregate are not significant and which are not included in the tables that follow. The obligations for these plans are included within other liabilities in the Company’s consolidated balance sheet and aggregated less than $35 million as of December 31, 2015 and 2014.

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Change in benefit obligation
Benefit obligation at beginning of year	$	16,452	$	13,967	$	6,979	$	6,346	$	2,462	$	2,017
Acquisitions/Transfers in		—		—		94		—		—		—
Service cost		293		241		154		141		75		65
Interest cost		655		676		206		252		98		97
Participant contributions		—		—		9		10		14		18
Foreign exchange rate changes		—		—		(589)		(663)		(22)		(11)
Plan amendments		—		(266)		(6)		3		(211)		—
Actuarial (gain) loss		(657)		2,874		(274)		1,128		(80)		415
Medicare Part D Reimbursement		—		—		—		—		1		1
Benefit payments		(874)		(1,039)		(232)		(235)		(122)		(140)
Settlements, curtailments, special termination benefits and other		(13)		(1)		(19)		(3)		1		—
Benefit obligation at end of year	$	15,856	$	16,452	$	6,322	$	6,979	$	2,216	$	2,462
Change in plan assets
Fair value of plan assets at beginning of year	$	14,643	$	13,889	$	5,957	$	5,758	$	1,436	$	1,405
Acquisitions/Transfers in		—		—		8		—		—		—
Actual return on plan assets		100		1,749		287		813		36		148
Company contributions		113		45		151		165		3		5
Participant contributions		—		—		9		10		14		18
Foreign exchange rate changes		—		—		(498)		(554)		—		—
Benefit payments		(874)		(1,039)		(232)		(235)		(122)		(140)
Settlements, curtailments, special termination benefits and other		(16)		(1)		(13)		—		—		—
Fair value of plan assets at end of year	$	13,966	$	14,643	$	5,669	$	5,957	$	1,367	$	1,436
Funded status at end of year	$	(1,890)	$	(1,809)	$	(653)	$	(1,022)	$	(849)	$	(1,026)

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	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Amounts recognized in the Consolidated Balance Sheet as of Dec. 31,
Non-current assets	$	3	$	3	$	185	$	43	$	—	$	—
Accrued benefit cost
Current liabilities		(47)		(46)		(10)		(10)		(3)		(4)
Non-current liabilities		(1,846)		(1,766)		(828)		(1,055)		(846)		(1,022)
Ending balance	$	(1,890)	$	(1,809)	$	(653)	$	(1,022)	$	(849)	$	(1,026)

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Amounts recognized in accumulated other comprehensive income as of Dec. 31,
Net transition obligation (asset)	$	—	$	—	$	(2)	$	(3)	$	—	$	—
Net actuarial loss (gain)		5,366		5,462		1,610		2,200		815		914
Prior service cost (credit)		(227)		(251)		(68)		(93)		(270)		(102)
Ending balance	$	5,139	$	5,211	$	1,540	$	2,104	$	545	$	812

The balance of amounts recognized for international plans in accumulated other comprehensive income as of December 31 in the preceding table are presented based on the foreign currency exchange rate on that date.

The pension accumulated benefit obligation represents the actuarial present value of benefits based on employee service and compensation as of the measurement date and does not include an assumption about future compensation levels. The accumulated benefit obligation of the U.S. pension plans was $14.834 billion and $15.335 billion at December 31, 2015 and 2014, respectively. The accumulated benefit obligation of the international pension plans was $5.773 billion and $6.401 billion at December 31, 2015 and 2014, respectively.

The following amounts relate to pension plans with accumulated benefit obligations in excess of plan assets as of December 31:

	Qualified and Non-qualified Pension Plans
	United States				International
(Millions)	2015		2014		2015		2014
Projected benefit obligation	$	15,856	$	16,435	$	2,382	$	2,588
Accumulated benefit obligation		14,834		15,319		2,149		2,335
Fair value of plan assets		13,966		14,623		1,566		1,636

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Components of net periodic cost and other amounts recognized in other comprehensive income

Net periodic benefit cost is recorded in cost of sales, selling, general and administrative expenses, and research, development and related expenses. Components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for the years ended December 31 follow:

	Qualified and Non-qualified
	Pension Benefits												Postretirement
	United States						International						Benefits
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014		2013
Net periodic benefit cost (benefit)
Service cost	$	293	$	241	$	258	$	154	$	141	$	147	$	75	$	65	$	80
Interest cost		655		676		598		206		252		238		98		97		88
Expected return on plan assets		(1,069)		(1,043)		(1,046)		(308)		(312)		(291)		(91)		(90)		(90)
Amortization of transition (asset) obligation		—		—		—		(1)		(1)		(1)		—		—		—
Amortization of prior service cost (benefit)		(24)		4		5		(13)		(16)		(16)		(42)		(47)		(66)
Amortization of net actuarial (gain) loss		409		243		399		144		121		153		73		56		95
Net periodic benefit cost (benefit)	$	264	$	121	$	214	$	182	$	185	$	230	$	113	$	81	$	107
Settlements, curtailments, special termination benefits and other		2		—		—		(6)		4		2		1		—		—
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	$	266	$	121	$	214	$	176	$	189	$	232	$	114	$	81	$	107
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition (asset) obligation		—		—		—		1		1		1		—		—		—
Prior service cost (benefit)		—		(266)		—		10		3		3		(212)		—		(20)
Amortization of prior service cost (benefit)		24		(4)		(5)		13		16		16		42		47		66
Net actuarial (gain) loss		312		2,167		(743)		(270)		592		(294)		(23)		358		(313)
Amortization of net actuarial (gain) loss		(409)		(243)		(399)		(144)		(121)		(153)		(73)		(56)		(95)
Foreign currency		—		—		—		(174)		(215)		(47)		(1)		(1)		(2)
Total recognized in other comprehensive (income) loss	$	(73)	$	1,654	$	(1,147)	$	(564)	$	276	$	(474)	$	(267)	$	348	$	(364)
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	$	193	$	1,775	$	(933)	$	(388)	$	465	$	(242)	$	(153)	$	429	$	(257)

Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over the next fiscal year

	Qualified and Non-qualified
	Pension Benefits				Postretirement
(Millions)	United States		International		Benefits
Amortization of transition (asset) obligation	$	—	$	(1)	$	—
Amortization of prior service cost (benefit)		(24)		(13)		(55)
Amortization of net actuarial (gain) loss		354		90		62
Total amortization expected over the next fiscal year	$	330	$	76	$	7

The Company primarily amortizes amounts recognized as prior service cost (benefit) over the average future service period of active employees at the date of the amendment.

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Weighted-average assumptions used to determine benefit obligations as of December 31

	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Discount rate	4.47	%	4.10	%	4.98	%	3.12	%	3.11	%	4.02	%	4.48	%	4.07	%	4.83	%
Compensation rate increase	4.10	%	4.10	%	4.00	%	2.90	%	3.33	%	3.35	%	N/A		N/A		N/A

Weighted-average assumptions used to determine net cost for years ended December 31

	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Discount rate	4.10	%	4.98	%	4.14	%	3.11	%	4.02	%	3.78	%	4.07	%	4.83	%	4.00	%
Expected return on assets	7.75	%	7.75	%	8.00	%	5.90	%	5.83	%	5.87	%	6.91	%	7.11	%	7.19	%
Compensation rate increase	4.10	%	4.00	%	4.00	%	3.33	%	3.35	%	3.31	%	N/A		N/A		N/A

The Company is in the process of transitioning all current and future retirees in the U.S. postretirement health care benefit plans to a savings account benefits-based plan. The contributions provided by the Company to the health savings accounts increase 3 percent per year for employees who retired prior to January 1, 2016 and increase 1.5 percent for employees who retire on or after January 1, 2016. Therefore, the Company no longer has material exposure to health care cost inflation.

The Company determines the discount rate used to measure plan liabilities as of the December 31 measurement date for the pension and postretirement benefit plans, which is also the date used for the related annual measurement assumptions. The discount rate reflects the current rate at which the associated liabilities could be effectively settled at the end of the year. The Company sets its rate to reflect the yield of a portfolio of high quality, fixed-income debt instruments that would produce cash flows sufficient in timing and amount to settle projected future benefits. Using this methodology, the Company determined a discount rate of 4.47% for pension and 4.48% for postretirement benefits to be appropriate for its U.S. plans as of December 31, 2015, which is an increase of 0.37 percentage points and 0.41 percentage points, respectively, from the rates used as of December 31, 2014. For the international pension and postretirement plans the discount rates also reflect the current rate at which the associated liabilities could be effectively settled at the end of the year. If the country has a deep market in corporate bonds the Company matches the expected cash flows from the plan either to a portfolio of bonds that generate sufficient cash flow or a notional yield curve generated from available bond information. In countries that do not have a deep market in corporate bonds, government bonds are considered with a risk premium to approximate corporate bond yields. Beginning in 2016, 3M changed the method used to estimate the service and interest cost components of the net periodic pension and other postretirement benefit costs. The new method measures service and interest costs separately using the spot yield curve approach applied to each corresponding obligation. Service costs are determined based on duration-specific spot rates applied to the service cost cash flows. The interest cost calculation is determined by applying duration-specific spot rates to the year-by-year projected benefit payments. The spot yield curve approach does not affect the measurement of the total benefit obligations as the change in service and interest costs offset in the actuarial gains and losses recorded in other comprehensive income. The Company changed to the new method to provide a more precise measure of service and interest costs by improving the correlation between the projected benefit cash flows and the discrete spot yield curve rates. The Company accounted for this change as a change in estimate prospectively beginning in the first quarter of 2016.

For the primary U.S. qualified pension plan, the Company’s assumption for the expected return on plan assets was 7.75% in 2015. Projected returns are based primarily on broad, publicly traded equity and fixed-income indices and forward-looking estimates of active portfolio and investment management. As of December 31, 2015, the Company’s 2016 expected long-term rate of return on U.S. plan assets is 7.50%, a decrease of 0.25 percentage points from 2015. The expected return assumption is based on the strategic asset allocation of the plan, long term capital market return expectations and expected performance from active investment management. The 2015 expected long-term rate of return

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is based on an asset allocation assumption of 25% global equities, 18% private equities, 41% fixed-income securities, and 16% absolute return investments independent of traditional performance benchmarks, along with positive returns from active investment management. The actual net rate of return on plan assets in 2015 was 0.7%. In 2014 the plan earned a rate of return of 13.0% and in 2013 earned a return of 6.0%. The average annual actual return on the plan assets over the past 10 and 25 years has been 7.8% and 10.0%, respectively. Return on assets assumptions for international pension and other post-retirement benefit plans are calculated on a plan-by-plan basis using plan asset allocations and expected long-term rate of return assumptions.

During 2015, the Company contributed $264 million to its U.S. and international pension plans and $3 million to its postretirement plans. During 2014, the Company contributed $210 million to its U.S. and international pension plans and $5 million to its postretirement plans. In 2016, the Company expects to contribute an amount in the range of $100 million to $200 million of cash to its U.S. and international retirement plans. The Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2016. Future contributions will depend on market conditions, interest rates and other factors.

Future Pension and Postretirement Benefit Payments

The following table provides the estimated pension and postretirement benefit payments that are payable from the plans to participants.

	Qualified and Non-qualified
	Pension Benefits				Postretirement
(Millions)	United States		International		Benefits
2016 Benefit Payments	$	987	$	205	$	141
2017 Benefit Payments		997		215		156
2018 Benefit Payments		1,008		228		172
2019 Benefit Payments		1,017		241		153
2020 Benefit Payments		1,029		250		155
Next five years		5,187		1,480		797

Plan Asset Management

3M’s investment strategy for its pension and postretirement plans is to manage the funds on a going-concern basis. The primary goal of the trust funds is to meet the obligations as required. The secondary goal is to earn the highest rate of return possible, without jeopardizing its primary goal, and without subjecting the Company to an undue amount of contribution risk. Fund returns are used to help finance present and future obligations to the extent possible within actuarially determined funding limits and tax-determined asset limits, thus reducing the potential need for additional contributions from 3M. The investment strategy has used long duration cash bonds and derivative instruments to offset a significant portion of the interest rate sensitivity of U.S. pension liabilities.

Normally, 3M does not buy or sell any of its own securities as a direct investment for its pension and other postretirement benefit funds. However, due to external investment management of the funds, the plans may indirectly buy, sell or hold 3M securities. The aggregate amount of 3M securities are not considered to be material relative to the aggregate fund percentages.

The discussion that follows references the fair value measurements of certain assets in terms of levels 1, 2 and 3. See Note 13 for descriptions of these levels. While the company believes the valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

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U.S. Pension Plans and Postretirement Benefit Plan Assets

In order to achieve the investment objectives in the U.S. pension plans and U.S. postretirement benefit plans, the investment policies include a target strategic asset allocation. The investment policies allow some tolerance around the target in recognition that market fluctuations and illiquidity of some investments may cause the allocation to a specific asset class to vary from the target allocation, potentially for long periods of time. Acceptable ranges have been designed to allow for deviation from strategic targets and to allow for the opportunity for tactical over- and under-weights. The portfolios will normally be rebalanced when the quarter-end asset allocation deviates from acceptable ranges. The allocation is reviewed regularly by the named fiduciary of the plans.  Approximately 39% of the postretirement benefit plan assets are in a 401(h) account. The 401(h) account assets are in the same trust as the primary U.S. pension plan and invested with the same investment objectives as the primary U.S. pension plan.

The fair values of the assets held by the U.S. pension plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
U.S. equities	$	1,897	$	1,766	$	—	$	—	$	—	$	—	$	1,897	$	1,766
Non-U.S. equities		1,149		1,214		—		—		—		—		1,149		1,214
Index and long/short equity funds*														578		607
Total Equities	$	3,046	$	2,980	$	—	$	—	$	—	$	—	$	3,624	$	3,587
Fixed Income
U.S. government securities	$	1,095	$	1,032	$	456	$	590	$	—	$	—	$	1,551	$	1,622
Non-U.S. government securities		—		7		126		381		—		—		126		388
Preferred and convertible securities		4		6		8		9		—		—		12		15
U.S. corporate bonds		9		8		2,820		2,889		—		—		2,829		2,897
Non-U.S. corporate bonds		—		—		616		566		—		—		616		566
Derivative instruments		(1)		6		40		126		—		—		39		132
Other*														11		32
Total Fixed Income	$	1,107	$	1,059	$	4,066	$	4,561	$	—	$	—	$	5,184	$	5,652
Private Equity
Derivative instruments	$	—	$	—	$	—	$	—	$	(106)	$	(74)	$	(106)	$	(74)
Growth equity		24		15		—		—		—		—		24		15
Partnership investments*														2,450		2,561
Total Private Equity	$	24	$	15	$	—	$	—	$	(106)	$	(74)	$	2,368	$	2,502
Absolute Return
Derivative instruments	$	—	$	—	$	(5)	$	—	$	—	$	—	$	(5)	$	—
Fixed income and other		253		26		46		52		—		—		299		78
Hedge fund/fund of funds*														1,409		1,807
Partnership investments*														355		288
Total Absolute Return	$	253	$	26	$	41	$	52	$	—	$	—	$	2,058	$	2,173
Cash and Cash Equivalents
Cash and cash equivalents	$	102	$	287	$	6	$	86	$	—	$	—	$	108	$	373
Cash and cash equivalents, valued at net asset value*														783		531
Total Cash and Cash Equivalents	$	102	$	287	$	6	$	86	$	—	$	—	$	891	$	904
Total	$	4,532	$	4,367	$	4,113	$	4,699	$	(106)	$	(74)	$	14,125	$	14,818
Other items to reconcile to fair value of plan assets													$	(159)	$	(175)
Fair value of plan assets													$	13,966	$	14,643

* In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value (NAV) per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

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The fair values of the assets held by the postretirement benefit plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
U.S. equities	$	508	$	565	$	—	$	—	$	—	$	—	$	508	$	565
Non-U.S. equities		59		56		—		—		—		—		59		56
Index and long/short equity funds*														49		55
Total Equities	$	567	$	621	$	—	$	—	$	—	$	—	$	616	$	676
Fixed Income
U.S. government securities	$	71	$	68	$	192	$	186	$	—	$	—	$	263	$	254
Non-U.S. government securities		—		—		8		17		—		—		8		17
U.S. corporate bonds		—		—		153		146		—		—		153		146
Non-U.S. corporate bonds		—		—		35		34		—		—		35		34
Derivative instruments		—		—		2		5		—		—		2		5
Other*														—		1
Total Fixed Income	$	71	$	68	$	390	$	388	$	—	$	—	$	461	$	457
Private Equity
Derivative instruments	$	—	$	—	$	—	$	—	$	(4)	$	(3)	$	(4)	$	(3)
Growth equity		1		1		—		—		—		—		1		1
Partnership investments*														136		162
Total Private Equity	$	1	$	1	$	—	$	—	$	(4)	$	(3)	$	133	$	160
Absolute Return
Fixed income and other	$	10	$	1	$	2	$	2	$	—	$	—	$	12	$	3
Hedge fund/fund of funds*														54		66
Partnership investments*														14		10
Total Absolute Return	$	10	$	1	$	2	$	2	$	—	$	—	$	80	$	79
Cash and Cash Equivalents
Cash and cash equivalents	$	38	$	33	$	—	$	3	$	—	$	—	$	38	$	36
Cash and cash equivalents, valued at net asset value*														30		20
Total Cash and Cash Equivalents	$	38	$	33	$	—	$	3	$	—	$	—	$	68	$	56
Total	$	687	$	724	$	392	$	393	$	(4)	$	(3)	$	1,358	$	1,428
Other items to reconcile to fair value of plan assets													$	9	$	8
Fair value of plan assets													$	1,367	$	1,436

*In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded.

Fixed income includes derivative instruments such as credit default swaps, interest rate swaps and futures contracts. Corporate debt includes bonds and notes, asset backed securities, collateralized mortgage obligations and private placements. Swaps and derivative instruments are valued by the custodian using closing market swap curves and market derived inputs. U.S. government and government agency bonds and notes are valued at the closing price reported in the active market in which the individual security is traded. Corporate bonds and notes, asset backed securities and collateralized mortgage obligations are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks. Private placements are valued by the custodian using recognized pricing services and sources. 

The private equity portfolio is a diversified mix of derivative instruments, growth equity and partnership interests. Derivative investments are written options that are valued by independent parties using market inputs and valuation models. Growth equity investments are valued at the closing price reported in the active market in which the individual securities are traded.  

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Absolute return consists primarily of partnership interests in hedge funds, hedge fund of funds or other private fund vehicles. Corporate debt instruments are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risk ratings.

Other items to reconcile to fair value of plan assets include the net of insurance receivables for WG Trading Company, interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.

The balances of and changes in the fair values of the U.S. pension plans’ and postretirement plans’ level 3 assets for the periods ended December 31, 2015 and 2014 were not material.

International Pension Plans Assets

Outside the U.S., pension plan assets are typically managed by decentralized fiduciary committees. The disclosure below of asset categories is presented in aggregate for over 70 defined benefit plans in 27 countries; however, there is significant variation in asset allocation policy from country to country. Local regulations, local funding rules, and local financial and tax considerations are part of the funding and investment allocation process in each country. The Company provides standard funding and investment guidance to all international plans with more focused guidance to the larger plans.

Each plan has its own strategic asset allocation. The asset allocations are reviewed periodically and rebalanced when necessary.

The fair values of the assets held by the international pension plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
Growth equities	$	718	$	672	$	195	$	176	$	—	$	—	$	913	$	848
Value equities		494		595		27		23		—		—		521		618
Core equities		31		19		671		624		4		4		706		647
Equities, valued at net asset value*														17		18
Total Equities	$	1,243	$	1,286	$	893	$	823	$	4	$	4	$	2,157	$	2,131
Fixed Income
Domestic government	$	283	$	87	$	346	$	533	$	4	$	3	$	633	$	623
Foreign government		—		45		206		670		—		—		206		715
Corporate debt securities		30		1		661		701		10		12		701		714
Fixed income securities, valued at net asset value*														770		863
Total Fixed Income	$	313	$	133	$	1,213	$	1,904	$	14	$	15	$	2,310	$	2,915
Private Equity
Real estate	$	1	$	3	$	5	$	5	$	4	$	4	$	10	$	12
Real estate, valued at net asset value*														126		119
Partnership investments*														24		23
Total Private Equity	$	1	$	3	$	5	$	5	$	4	$	4	$	160	$	154
Absolute Return
Derivatives	$	(2)	$	—	$	15	$	(4)	$	—	$	—	$	13	$	(4)
Insurance		—		—		—		—		456		476		456		476
Other		—		—		4		10		3		3		7		13
Other, valued at net asset value*														1		3
Hedge funds*														119		117
Total Absolute Return	$	(2)	$	—	$	19	$	6	$	459	$	479	$	596	$	605
Cash and Cash Equivalents
Cash and cash equivalents	$	126	$	161	$	347	$	29	$	—	$	—	$	473	$	190
Cash and cash equivalents, valued at net asset value*														1		3
Total Cash and Cash Equivalents	$	126	$	161	$	347	$	29	$	—	$	—	$	474	$	193
Total	$	1,681	$	1,583	$	2,477	$	2,767	$	481	$	502	$	5,697	$	5,998
Other items to reconcile to fair value of plan assets													$	(28)	$	(41)
Fair value of plan assets													$	5,669	$	5,957

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*In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

Equities consist primarily of mandates in public equity securities managed to various public equity indices. Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded.

Fixed Income investments include domestic and foreign government, and corporate, (including mortgage backed and other debt) securities. Governments, corporate bonds and notes and mortgage backed securities are valued at the closing price reported if traded on an active market or at yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks.

Private equity funds consist of partnership interests in a variety of funds. Real estate consists of property funds and REITS (Real Estate Investment Trusts). REITS are valued at the closing price reported in the active market in which it is traded.

Absolute return consists of private partnership interests in hedge funds, insurance contracts, derivative instruments, hedge fund of funds, and other alternative investments. Insurance consists of insurance contracts, which are valued using cash surrender values which is the amount the plan would receive if the contract was cashed out at year end. Derivative instruments consist of interest rate swaps that are used to help manage risks. 

Other items to reconcile to fair value of plan assets include the net of interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.

The balances of and changes in the fair values of the international pension plans’ level 3 assets consist primarily of insurance contracts under the absolute return asset class.  The aggregate of net purchases and net unrealized gains increased this balance by$16million and $46 million in 2015 and 2014, respectively.  Foreign currency exchange impacts decreased this balance by$36 million and $62 million in 2015 and 2014, respectively.

NOTE 12.  Derivatives

The Company uses interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity price fluctuations. The information that follows explains the various types of derivatives and financial instruments used by 3M, how and why 3M uses such instruments, how such instruments are accounted for, and how such instruments impact 3M’s financial position and performance.

Additional information with respect to the impacts on other comprehensive income of nonderivative hedging and derivative instruments is included in Note 6. Additional information with respect to the fair value of derivative instruments is included in Note 13. References to information regarding derivatives and/or hedging instruments associated with the Company’s long-term debt are also made in Note 10.

Types of Derivatives/Hedging Instruments and Inclusion in Income/Other Comprehensive Income:

Cash Flow Hedges:

For derivative instruments that are designated and qualify as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same

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period during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.

Cash Flow Hedging - Foreign Currency Forward and Option Contracts: The Company enters into foreign exchange forward and option contracts to hedge against the effect of exchange rate fluctuations on cash flows denominated in foreign currencies. These transactions are designated as cash flow hedges. The settlement or extension of these derivatives will result in reclassifications (from accumulated other comprehensive income) to earnings in the period during which the hedged transactions affect earnings. 3M may dedesignate these cash flow hedge relationships in advance of the occurrence of the forecasted transaction. The portion of gains or losses on the derivative instrument previously accumulated in other comprehensive income for dedesignated hedges remains in accumulated other comprehensive income until the forecasted transaction occurs. Changes in the value of derivative instruments after dedesignation are recorded in earnings and are included in the Derivatives Not Designated as Hedging Instruments section below. Beginning in the second quarter of 2014, 3M began extending the maximum length of time over which it hedges its exposure to the variability in future cash flows of the forecasted transactions from a previous term of 12 months to a longer term of 24 months, with certain currencies being extended further to 36 months starting in the first quarter of 2015.

Cash Flow Hedging - Commodity Price Management: The Company manages commodity price risks through negotiated supply contracts, price protection agreements and forward contracts. 3M discontinued the use of commodity price swaps as cash flow hedges of forecasted commodity transactions in the first quarter of 2015. The Company used commodity price swaps as cash flow hedges of forecasted commodity transactions to manage price volatility. The related mark-to-market gain or loss on qualifying hedges was included in other comprehensive income to the extent effective, and reclassified into cost of sales in the period during which the hedged transaction affected earnings.

Cash Flow Hedging — Interest Rate Contracts:In the third and fourth quarters of 2014, the Company entered into forward starting interest rate swaps with notional amounts totaling 500 million Euros as a hedge against interest rate volatility associated with the forecasted issuance of fixed rate debt. 3M terminated these interest rate swapsupon issuance of 750 million Euros aggregate principal amount of twelve-year fixed rate notes in connection with 3M’s 1.250 billion Eurobond offering in November 2014. The termination resulted in a $8 million pre-tax ($5 million after-tax) loss within accumulated other comprehensive income that will be amortized over the twelve-year life of the notes.

The amortization of gains and losses on forward starting interest rate swaps is included in the tables below as part of the gain/(loss) recognized in income on the effective portion of derivatives as a result of reclassification from accumulated other comprehensive income.

As of December 31, 2015, the Company had a balance of $124 million associated with the after tax net unrealized gain associated with cash flow hedging instruments recorded in accumulated other comprehensive income. This includes a remaining balance of $5 million (after tax loss) related to forward starting interest rate swaps, which will be amortized over the respective lives of the notes. Based on exchange rates as of December 31, 2015, 3M expects to reclassify approximately $98 million of the after-tax net unrealized foreign exchange cash flow hedging gains to earnings in 2016, approximately $23 million of the after-tax net unrealized foreign exchange cash flow hedging gains to earnings in 2017, and approximately $3 million of the after-tax net unrealized foreign exchange cash flow hedging gains to earnings after 2017 (with the impact offset by earnings/losses from underlying hedged items).

The location in the consolidated statements of income and comprehensive income and amounts of gains and losses related to derivative instruments designated as cash flow hedges are provided in the following table. Reclassifications of amounts from accumulated other comprehensive income into income include accumulated gains (losses) on dedesignated hedges at the time earnings are impacted by the forecasted transaction.

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Year Ended December 31, 2015

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	212	Cost of sales	$	178	Cost of sales	$	—
Commodity price swap contracts		—	Cost of sales		(2)	Cost of sales		—
Interest rate swap contracts		—	Interest expense		(2)	Interest expense		—
Total	$	212		$	174		$	—

Year Ended December 31, 2014

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	183	Cost of sales	$	3	Cost of sales	$	—
Commodity price swap contracts		(4)	Cost of sales		2	Cost of sales		—
Interest rate swap contracts		(8)	Interest expense		(1)	Interest expense		—
Total	$	171		$	4		$	—

Year Ended December 31, 2013

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	9	Cost of sales	$	(11)	Cost of sales	$	—
Foreign currency forward contracts		(108)	Interest expense		(108)	Interest expense		—
Commodity price swap contracts		1	Cost of sales		(2)	Cost of sales		—
Interest rate swap contracts		—	Interest expense		(1)	Interest expense		—
Total	$	(98)		$	(122)		$	—

Fair Value Hedges:

For derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivatives as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings.

Fair Value Hedging - Interest Rate Swaps: The Company manages interest expense using a mix of fixed and floating rate debt. To help manage borrowing costs, the Company may enter into interest rate swaps. Under these arrangements, the Company agrees to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. The mark-to-market of these fair value hedges is recorded as gains or losses in interest expense and is offset by the gain or loss of the underlying debt instrument, which also is recorded in interest expense. These fair value hedges are highly effective and, thus, there is no impact on earnings due to hedge ineffectiveness.

In July 2007, in connection with the issuance of a seven-year Eurobond for an amount of 750 million Euros, the Company completed a fixed-to-floating interest rate swap on a notional amount of 400 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation. In August 2010, the Company terminated 150 million Euros of the notional amount of this swap. As a result, a gain of 18 million Euros, recorded as part of the balance of the underlying debt, was amortized as an offset to interest expense over this debt’s remaining life. Prior to termination of the applicable portion of the interest rate swap, the mark-to-market of the hedge instrument was recorded as gains or losses in interest expense and was offset by the gain or loss on carrying value of the underlying debt instrument. Consequently, the subsequent amortization of the 18 million Euros recorded as part of the underlying debt balance was not part of gains on hedged items recognized in income in the tables below. The remaining interest rate swap of 250 million Euros (notional amount) matured in July 2014.

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In November 2013, 3M issued a Eurobond due in 2021 for a face amount of 600 million Euros. Upon debt issuance, 3M completed a fixed-to-floating interest rate swap on a notional amount of 300 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation.

In June 2014, 3M issued $950 million aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into an interest rate swap to convert $600 million of a $625 million note included in this issuance to an interest rate based on a floating three-month LIBOR index as a fair value hedge of a portion of the fixed interest rate medium-term note obligation.

In August 2015, 3M issued $1.500 billion aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into two interest rate swaps as fair value hedges of a portion of the fixed interest rate medium-term note obligation. The first converted a $450 million three-year fixed rate note, and the second converted $300 million of a five-year fixed rate note included in this issuance to an interest rate based on a floating three-month LIBOR index.

The location in the consolidated statements of income and amounts of gains and losses related to derivative instruments designated as fair value hedges and similar information relative to the hedged items are as follows:

Year ended December 31, 2015	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	(2)	Interest expense	$	2
Total		$	(2)		$	2

Year ended December 31, 2014	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	11	Interest expense	$	(11)
Total		$	11		$	(11)

Year ended December 31, 2013	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	(21)	Interest expense	$	21
Total		$	(21)		$	21

Net Investment Hedges:

The Company may use non-derivative (foreign currency denominated debt) and derivative (foreign exchange forward contracts) instruments to hedge portions of the Company’s investment in foreign subsidiaries and manage foreign exchange risk. For instruments that are designated and qualify as hedges of net investments in foreign operations and that meet the effectiveness requirements, the net gains or losses attributable to changes in spot exchange rates are recorded in cumulative translation within other comprehensive income. The remainder of the change in value of such instruments is recorded in earnings. Recognition in earnings of amounts previously recorded in cumulative translation is limited to circumstances such as complete or substantially complete liquidation of the net investment in the hedged foreign operation. To the extent foreign currency denominated debt is not designated in or is dedesignated from a net investment hedge relationship, changes in value of that portion of foreign currency denominated debt due to exchange rate changes are recorded in earnings through their maturity date.

3M’s use of foreign exchange forward contracts designated in hedges of the Company’s net investment in foreign subsidiaries can vary by time period depending on when foreign currency denominated debt balances designated in such relationships are dedesignated, matured, or are newly issued and designated. Additionally, variation can occur in connection with the extent of the Company’s desired foreign exchange risk coverage.

At December 31, 2015, the total notional amount of foreign exchange forward contracts designated in net investment hedges was approximately 974 million Euros and approximately 248 billion South Korean Won, along with a principal

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amount of long-term debt instruments designated in net investment hedges totaling 3.6 billion Euros. The maturity dates of these derivative and nonderivative instruments designated in net investment hedges range from 2016 to 2030.

The location in the consolidated statements of income and comprehensive income and amounts of gains and losses related to derivative and nonderivative instruments designated as net investment hedges are as follows. There were no reclassifications of the effective portion of net investment hedges out of accumulated other comprehensive income into income for the periods presented in the table below.

Year ended December 31, 2015

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	63	N/A	$	—
Foreign currency forward contracts		143	Cost of sales		11
Total	$	206		$	11

Year ended December 31, 2014

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	152	N/A	$	—
Foreign currency forward contracts		94	Cost of sales		1
Total	$	246		$	1

Year ended December 31, 2013

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	(82)	N/A	$	—
Foreign currency forward contracts		12	Cost of sales		—
Total	$	(70)		$	—

Derivatives Not Designated as Hedging Instruments:

Derivatives not designated as hedging instruments include dedesignated foreign currency forward and option contracts that formerly were designated in cash flow hedging relationships (as referenced in the Cash Flow Hedges section above). In addition, 3M enters into foreign currency forward contracts to offset, in part, the impacts of certain intercompany activities (primarily associated with intercompany licensing arrangements) and enters into commodity price swaps to offset, in part, fluctuations in costs associated with the use of certain commodities and precious metals. These derivative instruments are not designated in hedging relationships; therefore, fair value gains and losses on these contracts are recorded in earnings. The Company does not hold or issue derivative financial instruments for trading purposes.

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The location in the consolidated statements of income and amounts of gains and losses related to derivative instruments not designated as hedging instruments are as follows:

	Gain (Loss) on Derivative Recognized in Income
			Year ended		Year ended		Year ended
			December 31,		December 31,		December 31,
Derivatives Not Designated as Hedging Instruments			2015		2014		2013
(Millions)	Location		Amount		Amount		Amount
Foreign currency forward/option contracts	Cost of sales	$	5	$	10	$	20
Foreign currency forward contracts	Interest expense		(30)		(40)		(43)
Commodity price swap contracts	Cost of sales		(3)		—		(1)
Total		$	(28)	$	(30)	$	(24)

Location and Fair Value Amount of Derivative Instruments:

The following tables summarize the fair value of 3M’s derivative instruments, excluding nonderivative instruments used as hedging instruments, and their location in the consolidated balance sheet. Notional amounts below are presented at period end foreign exchange rates, except for certain interest rate swaps, which are presented using the inception date’s foreign exchange rate. Additional information with respect to the fair value of derivative instruments is included in Note 13.

	Gross		Assets			Liabilities
December 31, 2015	Notional			Fair			Fair
(Millions)	Amount		Location	Value Amount		Location	Value Amount
Derivatives designated as
hedging instruments
Foreign currency forward/option contracts	$	2,815	Other current assets	$	148	Other current liabilities	$	14
Foreign currency forward/option contracts		1,240	Other assets		61	Other liabilities		3
Interest rate swap contracts		1,753	Other assets		24	Other liabilities		1
Total derivatives designated as hedging instruments				$	233		$	18
Derivatives not designated as
hedging instruments
Foreign currency forward/option contracts	$	5,359	Other current assets	$	63	Other current liabilities	$	51
Total derivatives not designated as hedging instruments				$	63		$	51
Total derivative instruments				$	296		$	69

	Gross		Assets			Liabilities
December 31, 2014	Notional			Fair			Fair
(Millions)	Amount		Location	Value Amount		Location	Value Amount
Derivatives designated as
hedging instruments
Foreign currency forward/option contracts	$	1,865	Other current assets	$	116	Other current liabilities	$	2
Foreign currency forward/option contracts		656	Other assets		47	Other liabilities		1
Commodity price swap contracts		20	Other current assets		—	Other current liabilities		4
Interest rate swap contracts		1,003	Other assets		27	Other liabilities		3
Total derivatives designated as hedging instruments				$	190		$	10
Derivatives not designated as
hedging instruments
Foreign currency forward/option contracts	$	6,582	Other current assets	$	66	Other current liabilities	$	33
Total derivatives not designated as hedging instruments				$	66		$	33
Total derivative instruments				$	256		$	43

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Credit Risk and Offsetting of Assets and Liabilities of Derivative Instruments:

The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company’s risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. As of December 31, 2015, 3M has International Swaps and Derivatives Association (ISDA) agreements with 16 applicable banks and financial institutions which contain netting provisions. In addition to a master agreement with 3M supported by a primary counterparty’s parent guarantee, 3M also has associated credit support agreements in place with 15 of its primary derivative counterparties which, among other things, provide the circumstances under which either party is required to post eligible collateral (when the market value of transactions covered by these agreements exceeds specified thresholds or if a counterparty’s credit rating has been downgraded to a predetermined rating). The Company does not anticipate nonperformance by any of these counterparties.

3M has elected to present the fair value of derivative assets and liabilities within the Company’s consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation. However, the following tables provide information as if the Company had elected to offset the asset and liability balances of derivative instruments, netted in accordance with various criteria in the event of default or termination as stipulated by the terms of netting arrangements with each of the counterparties. For each counterparty, if netted, the Company would offset the asset and liability balances of all derivatives at the end of the reporting period based on the 3M entity that is a party to the transactions. Derivatives not subject to master netting agreements are not eligible for net presentation. As of the applicable dates presented below, no cash collateral had been received or pledged related to these derivative instruments.

Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties

December 31, 2015			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Assets		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Liabilities		Received		Derivative Assets
Derivatives subject to master netting agreements	$	296	$	37	$	—	$	259
Derivatives not subject to master netting agreements		—						—
Total	$	296					$	259

December 31, 2014			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Assets		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Liabilities		Received		Derivative Assets
Derivatives subject to master netting agreements	$	256	$	20	$	—	$	236
Derivatives not subject to master netting agreements		—						—
Total	$	256					$	236

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Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties

December 31, 2015			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Liabilities		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Assets		Pledged		Derivative Liabilities
Derivatives subject to master netting agreements	$	64	$	37	$	—	$	27
Derivatives not subject to master netting agreements		5						5
Total	$	69					$	32

December 31, 2014			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Liabilities		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Assets		Pledged		Derivative Liabilities
Derivatives subject to master netting agreements	$	36	$	20	$	—	$	16
Derivatives not subject to master netting agreements		7						7
Total	$	43					$	23

Foreign Currency Effects

3M estimates that year-on-year foreign currency transaction effects, including hedging impacts, increased pre-tax income by approximately$180 million and $10 million in 2015 and 2014, respectively. These estimates include transaction gains and losses, including derivative instruments designed to reduce foreign currency exchange rate risks and the negative impact of swapping Venezuelan bolivars into U.S. dollars.

NOTE 13.  Fair Value Measurements

3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis:

For 3M, assets and liabilities that are measured at fair value on a recurring basis primarily relate to available-for-sale marketable securities, available-for-sale investments (included as part of investments in the Consolidated Balance Sheet) and certain derivative instruments. Derivatives include cash flow hedges, interest rate swaps and most net investment hedges. The information in the following paragraphs and tables primarily addresses matters relative to these financial assets and liabilities. Separately, there were no material fair value measurements with respect to nonfinancial assets or

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liabilities that are recognized or disclosed at fair value in the Company’s financial statements on a recurring basis for 2015 and 2014.

3M uses various valuation techniques, which are primarily based upon the market and income approaches, with respect to financial assets and liabilities. Following is a description of the valuation methodologies used for the respective financial assets and liabilities measured at fair value.

Available-for-sale marketable securities — except certain U.S. municipal securities:

Marketable securities, except certain U.S. municipal securities, are valued utilizing multiple sources. A weighted average price is used for these securities. Market prices are obtained for these securities from a variety of industry standard data providers, security master files from large financial institutions, and other third-party sources. These multiple prices are used as inputs into a distribution-curve-based algorithm to determine the daily fair value to be used. 3M classifies U.S. treasury securities as level 1, while all other marketable securities (excluding certain U.S. municipal securities) are classified as level 2. Marketable securities are discussed further in Note 9.

Available-for-sale marketable securities —certain U.S. municipal securities only:

In the fourth quarter 2014, 3M obtained a municipal bond with the City of Nevada, Missouri, which represent 3M’s only U.S. municipal securities holding as of December 31, 2015. Due to the nature of this security, the valuation method utilized will include the financial health of the City of Nevada, any recent municipal bond issuances by Nevada, and macroeconomic considerations related to the direction of interest rates and the health of the overall municipal bond market, and as such will be classified as a level 3 security.

Available-for-sale investments:

Investments include equity securities that are traded in an active market. Closing stock prices are readily available from active markets and are used as being representative of fair value. 3M classifies these securities as level 1.

Derivative instruments:

The Company’s derivative assets and liabilities within the scope of ASC 815, Derivatives and Hedging, are required to be recorded at fair value. The Company’s derivatives that are recorded at fair value include foreign currency forward and option contracts, commodity price swaps, interest rate swaps, and net investment hedges where the hedging instrument is recorded at fair value. Net investment hedges that use foreign currency denominated debt to hedge 3M’s net investment are not impacted by the fair value measurement standard under ASC 820, as the debt used as the hedging instrument is marked to a value with respect to changes in spot foreign currency exchange rates and not with respect to other factors that may impact fair value.

3M has determined that foreign currency forwards, commodity price swaps, currency swaps, foreign currency options, interest rate swaps and cross-currency swaps will be considered level 2 measurements. 3M uses inputs other than quoted prices that are observable for the asset. These inputs include foreign currency exchange rates, volatilities, and interest rates. Derivative positions are primarily valued using standard calculations/models that use as their basis readily observable market parameters. Industry standard data providers are 3M’s primary source for forward and spot rate information for both interest rates and currency rates, with resulting valuations periodically validated through third-party or counterparty quotes and a net present value stream of cash flows model.

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The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis.

			Fair Value Measurements
(Millions)	Fair Value at		Using Inputs Considered as
Description	December 31, 2015		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
Foreign government agency securities	$	10	$	—	$	10	$	—
Corporate debt securities		10		—		10		—
Commercial paper		12		—		12		—
Certificates of deposit/time deposits		26		—		26		—
Asset-backed securities:
Automobile loan related		26		—		26		—
Credit card related		10		—		10		—
Equipment lease related		2		—		2		—
Other		19		—		19		—
U.S. municipal securities		12		—		—		12
Derivative instruments — assets:
Foreign currency forward/option contracts		272		—		272		—
Interest rate swap contracts		24		—		24		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		68		—		68		—
Interest rate swap contracts		1		—		1		—

			Fair Value Measurements
(Millions)	Fair Value at		Using Inputs Considered as
Description	December 31, 2014		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
U.S. government agency securities	$	108	$	—	$	108	$	—
Foreign government agency securities		95		—		95		—
Corporate debt securities		619		—		619		—
Certificates of deposit/time deposits		41		—		41		—
Asset-backed securities:
Automobile loan related		282		—		282		—
Credit card related		162		—		162		—
Equipment lease related		48		—		48		—
Other		46		—		46		—
U.S. treasury securities		38		38		—		—
U.S. municipal securities		15		—		—		15
Investments		1		1		—		—
Derivative instruments — assets:
Foreign currency forward/option contracts		229		—		229		—
Interest rate swap contracts		27		—		27		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		36		—		36		—
Commodity price swap contracts		4		—		4		—
Interest rate swap contracts		3		—		3		—

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The following table provides a reconciliation of the beginning and ending balances of items measured at fair value on a recurring basis in the table above that used significant unobservable inputs (level 3).

(Millions)
Marketable securities — certain U.S. municipal securities and auction rate
securities only	2015		2014		2013
Beginning balance	$	15	$	11	$	7
Total gains or losses:
Included in earnings		—		(1)		—
Included in other comprehensive income		—		2		4
Purchases and issuances		—		15		—
Sales and settlements		(3)		(12)		—
Transfers in and/or out of level 3		—		—		—
Ending balance		12		15		11
Change in unrealized gains or losses for the period included in earnings for securities held at the end of the reporting period		—		—		—

In addition, the plan assets of 3M’s pension and postretirement benefit plans are measured at fair value on a recurring basis (at least annually). Refer to Note 11.

Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis:

Disclosures are required for certain assets and liabilities that are measured at fair value, but are recognized and disclosed at fair value on a nonrecurring basis in periods subsequent to initial recognition. For 3M, such measurements of fair value relate primarily to long-lived asset impairments. There were no material long-lived asset impairments for 2015, 2014 and 2013.

Fair Value of Financial Instruments:

The Company’s financial instruments include cash and cash equivalents, marketable securities, accounts receivable, certain investments, accounts payable, borrowings, and derivative contracts. The fair values of cash and cash equivalents, accounts receivable, accounts payable, and short-term borrowings and current portion of long-term debt (except the medium-term fixed rate notes totaling $1 billion, which will mature in September 2016 and are shown separately in the table below) approximated carrying values because of the short-term nature of these instruments. Available-for-sale marketable securities and investments, in addition to certain derivative instruments, are recorded at fair values as indicated in the preceding disclosures. For its long-term debt, the Company utilized third-party quotes to estimate fair values (classified as level 2). Information with respect to the carrying amounts and estimated fair values of these financial instruments follow:

	December 31, 2015				December 31, 2014
	Carrying		Fair		Carrying		Fair
(Millions)	Value		Value		Value		Value
Medium-term fixed rate note due September 2016 (long-term in 2014 and short-term in 2015)	$	999	$	1,003	$	996	$	1,014
Long-term debt, excluding current portion and medium-term fixed rate note due September 2016		8,753		9,101		5,709		6,189

The fair values reflected above consider the terms of the related debt absent the impacts of derivative/hedging activity. The carrying amount of long-term debt referenced above is impacted by certain fixed-to-floating interest rate swaps that are designated as fair value hedges and by the designation of fixed rate Eurobond securities issued by the Company as hedging instruments of the Company’s net investment in its European subsidiaries. Many of 3M’s fixed-rate bonds were trading at a premium at December 31, 2015 and 2014 due to the low interest rates and tightening of 3M’s credit spreads.

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NOTE 14.  Commitments and Contingencies

Capital and Operating Leases:

Rental expense under operating leases was $316 million in 2015, $332 million in 2014 and $330 million in 2013. It is 3M’s practice to secure renewal rights for leases, thereby giving 3M the right, but not the obligation, to maintain a presence in a leased facility. 3M has three primary capital leases. First, 3M has a capital lease, which became effective in April 2003, that involves a building in the United Kingdom (with a lease term of 22 years). During the second quarter of 2003, 3M recorded a capital lease asset and obligation of approximately 33.5 million British Pound (GBP), or approximately $50 million at December 31, 2015, exchange rates. Second, during the fourth quarter of 2009, 3M recorded a capital lease asset and obligation of approximately $50 million related to an IT investment with an amortization period of seven years. Third, in the fourth quarter of 2014, 3M recorded a capital lease asset and obligation of approximately $15 million, which is discussed in more detail in Note 7.

Minimum lease payments under capital and operating leases with non-cancelable terms in excess of one year as of December 31, 2015, were as follows:

			Operating
(Millions)	Capital Leases		Leases
2016	$	11	$	234
2017		6		191
2018		4		134
2019		3		86
2020		3		72
After 2020		32		226
Total	$	59	$	943
Less: Amounts representing interest		5
Present value of future minimum lease payments		54
Less: Current obligations under capital leases		8
Long-term obligations under capital leases	$	46

Unconditional Purchase Obligations:

Unconditional purchase obligations are defined as an agreement to purchase goods or services that is enforceable and legally binding (non-cancelable, or cancelable only in certain circumstances). The Company estimates its total unconditional purchase obligation commitment (for those contracts with terms in excess of one year) as of December 31, 2015, at $596 million. Payments by year are estimated as follows: 2016 ($193 million), 2017 ($160 million), 2018 ($102 million), 2019 ($54 million), 2020 ($56 million) and after 2020 ($31 million). Many of these commitments relate to take or pay contracts, in which 3M guarantees payment to ensure availability of products or services that are sold to customers. The Company expects to receive consideration (products or services) for these unconditional purchase obligations. The purchase obligation amounts do not represent the entire anticipated purchases in the future, but represent only those items for which the Company is contractually obligated. The majority of 3M’s products and services are purchased as needed, with no unconditional commitment. For this reason, these amounts will not provide an indication of the Company’s expected future cash outflows related to purchase obligations.

Warranties/Guarantees:

3M’s accrued product warranty liabilities, recorded on the Consolidated Balance Sheet as part of current and long-term liabilities, are estimated at approximately $28 million at December 31, 2015, and $30 million at December 31, 2014. 3M does not consider this amount to be material. The fair value of 3M guarantees of loans with third parties and other guarantee arrangements are not material.

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Related Party Activity:

3M does not have any material related party activity.

Legal Proceedings:

The Company and some of its subsidiaries are involved in numerous claims and lawsuits, principally in the United States, and regulatory proceedings worldwide. These include various products liability (involving products that the Company now or formerly manufactured and sold), intellectual property, and commercial claims and lawsuits, including those brought under the antitrust laws, and environmental proceedings. Unless otherwise stated, the Company is vigorously defending all such litigation.

Process for Disclosure and Recording of Liabilities and Insurance Receivables Related to Legal Proceedings

Many lawsuits and claims involve highly complex issues relating to causation, scientific evidence, and whether there are actual damages and are otherwise subject to substantial uncertainties. Assessments of lawsuits and claims can involve a series of complex judgments about future events and can rely heavily on estimates and assumptions. The Company complies with the requirements of ASC 450, Contingencies, and related guidance, and records liabilities for legal proceedings in those instances where it can reasonably estimate the amount of the loss and where liability is probable. Where the reasonable estimate of the probable loss is a range, the Company records the most likely estimate of the loss, or the low end of the range if there is no one best estimate. The Company either discloses the amount of a possible loss or range of loss in excess of established accruals if estimable, or states that such an estimate cannot be made. The Company discloses significant legal proceedings even where liability is not probable or the amount of the liability is not estimable, or both, if the Company believes there is at least a reasonable possibility that a loss may be incurred.

The Company estimates insurance receivables based on an analysis of its numerous policies, including their exclusions, pertinent case law interpreting comparable policies, its experience with similar claims, and assessment of the nature of the claim and remaining coverage, and records an amount it has concluded is likely to be recovered. For those insured matters where the Company has taken an accrual, the Company also records receivables for the amount of insurance that it expects to recover under the Company’s insurance program. For those insured matters where the Company has not taken an accrual because the liability is not probable or the amount of the liability is not estimable, or both, but where the Company has incurred an expense in defending itself, the Company records receivables for the amount of insurance that it expects to recover for the expense incurred.

Because litigation is subject to inherent uncertainties, and unfavorable rulings or developments could occur, there can be no certainty that the Company may not ultimately incur charges in excess of presently recorded liabilities. A future adverse ruling, settlement, or unfavorable development could result in future charges that could have a material adverse effect on the Company’s results of operations or cash flows in the period in which they are recorded. Although the Company cannot estimate its exposure to all legal proceedings, it currently believes that such future charges, if any, would not have a material adverse effect on the consolidated financial position of the Company. Based on experience and developments, the Company reexamines its estimates of probable liabilities and associated expenses and receivables each period, and whether it is able to estimate a liability previously determined to be not estimable and/or not probable. Where appropriate, the Company makes additions to or adjustments of its estimated liabilities. As a result, the current estimates of the potential impact on the Company’s consolidated financial position, results of operations and cash flows for the legal proceedings and claims pending against the Company could change in the future.

The following sections first describe the significant legal proceedings in which the Company is involved, and then describe the liabilities and associated insurance receivables the Company has accrued relating to its significant legal proceedings.

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Respirator Mask/Asbestos Litigation

As of December 31, 2015, the Company is a named defendant, with multiple co-defendants, in numerous lawsuits in various courts that purport to represent approximately 2,130 individual claimants, compared to approximately 2,220 individual claimants with actions pending at December 31, 2014.

The vast majority of the lawsuits and claims resolved by and currently pending against the Company allege use of some of the Company’s mask and respirator products and seek damages from the Company and other defendants for alleged personal injury from workplace exposures to asbestos, silica, coal mine dust or other occupational dusts found in products manufactured by other defendants or generally in the workplace. A minority of the lawsuits and claims resolved by and currently pending against the Company generally allege personal injury from occupational exposure to asbestos from products previously manufactured by the Company, which are often unspecified, as well as products manufactured by other defendants, or occasionally at Company premises.

The Company’s current volume of new and pending matters is substantially lower than it experienced at the peak of filings in 2003. The Company expects that filing of claims by unimpaired claimants in the future will continue to be at much lower levels than in the past. Accordingly, the number of claims alleging more serious injuries, including mesothelioma and other malignancies, will represent a greater percentage of total claims than in the past. The Company has prevailed in all ten cases taken to trial, including eight of the nine cases tried to verdict (such trials occurred in 1999, 2000, 2001, 2003, 2004, 2007, and 2015), and an appellate reversal in 2005 of the 2001 jury verdict adverse to the Company. The remaining case, tried in 2009, was dismissed by the court at the close of plaintiff’s evidence, based on the court’s legal finding that the plaintiff had not presented sufficient evidence to support a jury verdict.

The Company has demonstrated in these past trial proceedings that its respiratory protection products are effective as claimed when used in the intended manner and in the intended circumstances. Consequently the Company believes that claimants are unable to establish that their medical conditions, even if significant, are attributable to the Company’s respiratory protection products. Nonetheless the Company’s litigation experience indicates that claims of persons with malignant conditions are costlier to resolve than the claims of unimpaired persons, and it therefore believes the average cost of resolving pending and future claims on a per-claim basis will continue to be higher than it experienced in prior periods when the vast majority of claims were asserted by the unimpaired.

As previously reported, the State of West Virginia, through its Attorney General, filed a complaint in 2003 against the Company and two other manufacturers of respiratory protection products in the Circuit Court of Lincoln County, West Virginia, and amended its complaint in 2005. The amended complaint seeks substantial, but unspecified, compensatory damages primarily for reimbursement of the costs allegedly incurred by the State for worker’s compensation and healthcare benefits provided to all workers with occupational pneumoconiosis and unspecified punitive damages. The case has been inactive since the fourth quarter of 2007, other than a case management conference in March 2011. In November 2013, the State filed a motion to bifurcate the lawsuit into separate liability and damages proceedings. At the hearing on the motion, the court declined to bifurcate the lawsuit. No liability has been recorded for this matter because the Company believes that liability is not probable and estimable at this time. In addition, the Company is not able to estimate a possible loss or range of loss given the lack of any meaningful discovery responses by the State of West Virginia, the otherwise minimal activity in this case and the fact that the complaint asserts claims against two other manufacturers where a defendant’s share of liability may turn on the law of joint and several liability and by the amount of fault, if any, a jury might allocate to each defendant if the case is ultimately tried.

Respirator Mask/Asbestos Liabilities and Insurance Receivables: The Company estimates its respirator mask/asbestos liabilities, including the cost to resolve the claims and defense costs, by examining: (i) the Company’s experience in resolving claims, (ii) apparent trends, (iii) the apparent quality of claims (e.g., whether the claim has been asserted on behalf of asymptomatic claimants), (iv) changes in the nature and mix of claims (e.g., the proportion of claims asserting usage of the Company’s mask or respirator products and alleging exposure to each of asbestos, silica, coal or other occupational dusts, and claims pleading use of asbestos-containing products allegedly manufactured by the Company), (v) the number of current claims and a projection of the number of future asbestos and other claims that may be filed against the Company, (vi) the cost to resolve recently settled claims, and (vii) an estimate of the cost to resolve and defend against current and future claims.

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Developments may occur that could affect the Company’s estimate of its liabilities. These developments include, but are not limited to, significant changes in (i) the number of future claims, (ii) the average cost of resolving claims, (iii) the legal costs of defending these claims and in maintaining trial readiness, (iv) changes in the mix and nature of claims received, (v) trial and appellate outcomes, (vi) changes in the law and procedure applicable to these claims, and (vii) the financial viability of other co-defendants and insurers.

As a result of the Company’s cost of resolving claims of persons who claim more serious injuries, including mesothelioma and other malignancies, the Company increased its accruals in 2015 for respirator mask/asbestos liabilities by $50 million. In 2015, the Company made payments for legal fees and settlements of $46 million related to the respirator mask/asbestos litigation. As of December 31, 2015, the Company had accruals for respirator mask/asbestos liabilities of $144 million (excluding Aearo accruals). This accrual represents the low end in a range of loss. The Company cannot estimate the amount or upper end of the range of amounts by which the liability may exceed the accrual the Company has established because of the (i) inherent difficulty in projecting the number of claims that have not yet been asserted or the time period in which future claims may be asserted, (ii) the complaints nearly always assert claims against multiple defendants where the damages alleged are typically not attributed to individual defendants so that a defendant’s share of liability may turn on the law of joint and several liability, which can vary by state, (iii) the multiple factors described above that the Company considers in estimating its liabilities, and (iv) the several possible developments described above that may occur that could affect the Company’s estimate of liabilities.

As of December 31, 2015, the Company’s receivable for insurance recoveries related to the respirator mask/asbestos litigation was $39 million. The Company estimates insurance receivables based on an analysis of its policies, including their exclusions, pertinent case law interpreting comparable policies, its experience with similar claims, and an assessment of the nature of each claim and remaining coverage. The Company then records an amount it has concluded is likely to be recovered. Various factors could affect the timing and amount of recovery of this receivable, including (i) delays in or avoidance of payment by insurers; (ii) the extent to which insurers may become insolvent in the future, and (iii) the outcome of negotiations with insurers and legal proceedings with respect to respirator mask/asbestos liability insurance coverage.

The Company has unresolved coverage with claims-made carriers for respirator mask claims. The Company is also seeking coverage under the policies of certain insolvent insurers. Once those claims for coverage are resolved, the Company will have collected substantially all of its remaining insurance coverage for respirator mask/asbestos claims.

Respirator Mask/Asbestos Litigation — Aearo Technologies

On April 1, 2008, a subsidiary of the Company purchased the stock of Aearo Holding Corp., the parent of Aearo Technologies (“Aearo”). Aearo manufactured and sold various products, including personal protection equipment, such as eye, ear, head, face, fall and certain respiratory protection products.

As of December 31, 2015, Aearo and/or other companies that previously owned and operated Aearo’s respirator business (American Optical Corporation, Warner-Lambert LLC, AO Corp. and Cabot Corporation (“Cabot”)) are named defendants, with multiple co-defendants, including the Company, in numerous lawsuits in various courts in which plaintiffs allege use of mask and respirator products and seek damages from Aearo and other defendants for alleged personal injury from workplace exposures to asbestos, silica-related, or other occupational dusts found in products manufactured by other defendants or generally in the workplace.

As of December 31, 2015, the Company, through its Aearo subsidiary, had accruals of $21 million for product liabilities and defense costs related to current and future Aearo-related asbestos and silica-related claims. Responsibility for legal costs, as well as for settlements and judgments, is currently shared in an informal arrangement among Aearo, Cabot, American Optical Corporation and a subsidiary of Warner Lambert and their respective insurers (the “Payor Group”). Liability is allocated among the parties based on the number of years each company sold respiratory products under the “AO Safety” brand and/or owned the AO Safety Division of American Optical Corporation and the alleged years of exposure of the individual plaintiff. Aearo’s share of the contingent liability is further limited by an agreement entered into between Aearo and Cabot on July 11, 1995. This agreement provides that, so long as Aearo pays to Cabot a

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quarterly fee of $100,000, Cabot will retain responsibility and liability for, and indemnify Aearo against, any product liability claims involving exposure to asbestos, silica, or  silica products for respirators sold prior to July 11, 1995. Because of the difficulty in determining how long a particular respirator remains in the stream of commerce after being sold, Aearo and Cabot have applied the agreement to claims arising out of the alleged use of respirators involving exposure to asbestos, silica or silica products prior to January 1, 1997. With these arrangements in place, Aearo’s potential liability is limited to exposures alleged to have arisen from the use of respirators involving exposure to asbestos, silica, or silica products on or after January 1, 1997. To date, Aearo has elected to pay the quarterly fee. Aearo could potentially be exposed to additional claims for some part of the pre-July 11, 1995 period covered by its agreement with Cabot if Aearo elects to discontinue its participation in this arrangement, or if Cabot is no longer able to meet its obligations in these matters.

In March 2012, Cabot CSC Corporation and Cabot Corporation filed a lawsuit against Aearo in the Superior Court of Suffolk County, Massachusetts seeking declaratory relief as to the scope of Cabot’s indemnity obligations under the July 11, 1995 agreement, including whether Cabot has retained liability for coal workers’ pneumoconiosis claims, and seeking damages for breach of contract. In June 2014, the court granted Aearo’s motion for summary judgment on all claims. Cabot has filed a motion for reconsideration, and Aearo filed a motion for clarification of the court’s order granting Aearo summary judgment. In October 2014, the court denied Aearo’s motion for clarification. The court also denied, in part, Cabot’s motion for reconsideration and reaffirmed its ruling that Cabot retained liability for claims involving exposure to silica in coal mine dust. The court granted Cabot’s motion, in part, ruling that Aearo was not entitled to summary judgment on Cabot’s claim for equitable allocation, and on whether the 258 underlying claims were Cabot’s responsibility. These two issues remain in the case for further proceedings. New motions for summary judgment were filed and the court heard oral arguments in October 2015.

Developments may occur that could affect the estimate of Aearo’s liabilities. These developments include, but are not limited to: (i) significant changes in the number of future claims, (ii) significant changes in the average cost of resolving claims, (iii) significant changes in the legal costs of defending these claims, (iv) significant changes in the mix and nature of claims received, (v) trial and appellate outcomes, (vi) significant changes in the law and procedure applicable to these claims, (vii) significant changes in the liability allocation among the co-defendants, (viii) the financial viability of members of the Payor Group including exhaustion of available insurance coverage limits, and/or (ix) a determination that the interpretation of the contractual obligations on which Aearo has estimated its share of liability is inaccurate. The Company cannot determine the impact of these potential developments on its current estimate of Aearo’s share of liability for these existing and future claims. If any of the developments described above were to occur, the actual amount of these liabilities for existing and future claims could be significantly larger than the amount accrued.

Because of the inherent difficulty in projecting the number of claims that have not yet been asserted, the complexity of allocating responsibility for future claims among the Payor Group, and the several possible developments that may occur that could affect the estimate of Aearo’s liabilities, the Company cannot estimate the amount or range of amounts by which Aearo’s liability may exceed the accrual the Company has established.

Environmental Matters and Litigation

The Company’s operations are subject to environmental laws and regulations including those pertaining to air emissions, wastewater discharges, toxic substances, and the handling and disposal of solid and hazardous wastes enforceable by national, state, and local authorities around the world, and private parties in the United States and abroad. These laws and regulations provide, under certain circumstances, a basis for the remediation of contamination, for restoration of or compensation for damages to natural resources, and for personal injury and property damage claims. The Company has incurred, and will continue to incur, costs and capital expenditures in complying with these laws and regulations, defending personal injury and property damage claims, and modifying its business operations in light of its environmental responsibilities. In its effort to satisfy its environmental responsibilities and comply with environmental laws and regulations, the Company has established, and periodically updates, policies relating to environmental standards of performance for its operations worldwide.

Under certain environmental laws, including the United States Comprehensive Environmental Response, Compensation and Liability Act of 1980 and similar state laws, the Company may be jointly and severally liable, typically with other

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companies, for the costs of remediation of environmental contamination at current or former facilities and at off-site locations. The Company has identified numerous locations, most of which are in the United States, at which it may have some liability. Please refer to the section entitled “Environmental Liabilities and Insurance Receivables” that follows for information on the amount of the accrual.

Environmental Matters

As previously reported, the Company has been voluntarily cooperating with ongoing reviews by local, state, federal (primarily the U.S. Environmental Protection Agency (EPA)), and international agencies of possible environmental and health effects of various perfluorinated compounds (“PFCs”), including perfluorooctanyl compounds such as perfluorooctanoate (“PFOA”) and perfluorooctane sulfonate (“PFOS”). As a result of its phase-out decision in May 2000, the Company no longer manufactures perfluorooctanyl compounds. The company ceased manufacturing and using the vast majority of these compounds within approximately two years of the phase-out announcement, and ceased all manufacturing and the last significant use of this chemistry by the end of 2008. Through its ongoing life cycle management and its raw material composition identification processes associated with the Company’s policies covering the use of all persistent and bio-accumulative materials, the Company has on occasion identified the presence of precursor chemicals in materials received from suppliers that may ultimately degrade to PFOA, PFOS, or similar compounds. Upon such identification, the Company works to find alternatives for such materials.

Regulatory activities concerning PFOA and/or PFOS continue in the United States, Europe and elsewhere, and before certain international bodies. These activities include gathering of exposure and use information, risk assessment, and consideration of regulatory approaches. As the database of studies of both chemicals has expanded, the EPA has developed draft human health effects documents summarizing the available data from these studies. In February 2014, the EPA initiated external peer review of its draft human health effects documents for PFOA and PFOS. The peer review panel met in August 2014. The EPA has stated that following the peer review process it will revise its health effects documents and use them to establish lifetime health advisories for PFOS and PFOA in drinking water. Lifetime health advisories, while not enforceable, serve as guidance and are benchmarks for determining if concentrations of chemicals in tap water from public utilities are safe for public consumption. Once finalized, the EPA stated that the lifetime health advisories are expected to supersede the provisional health advisories for PFOA and PFOS in drinking water issued by the EPA in 2009 — currently at 0.4 micrograms per liter for PFOA and 0.2 micrograms per liter for PFOS. In an effort to collect exposure information under the Safe Drinking Water Act, the EPA published on May 2, 2012 a list of unregulated substances, including six PFCs, required to be monitored during the period 2013-2015 by public water system supplies to determine the extent of their occurrence. The EPA is reporting results from this exercise on a rolling basis that will continue in 2016. Through year-end 2015, the EPA has reported results for 4,764 public water supplies nationwide. None of these have reported PFOA above the provisional health advisory level issued by the EPA in 2009, and seventeen have reported PFOS levels above the 2009 provisional health advisory.

The Company is continuing to make progress in its work, under the supervision of state regulators, to address its historic disposal of PFC-containing waste associated with manufacturing operations at the Decatur, Alabama, Cottage Grove, Minnesota, and Cordova, Illinois plants.

As previously reported, the Company entered into a voluntary remedial action agreement with the Alabama Department of Environmental Management (ADEM) to address the presence of PFCs in the soil at the Company’s manufacturing facility in Decatur, Alabama. Pursuant to a permit issued by ADEM, for approximately twenty years, the Company incorporated its wastewater treatment plant sludge containing PFCs in fields at its Decatur facility. After a review of the available options to address the presence of PFCs in the soil, ADEM agreed that the preferred remediation option is to use a multilayer cap over the former sludge incorporation areas on the manufacturing site with subsequent groundwater migration controls and treatment. Implementation of that option will continue and is expected to be completed in 2018.

The Company continues to work with the Minnesota Pollution Control Agency (MPCA) pursuant to the terms of the previously disclosed May 2007 Settlement Agreement and Consent Order to address the presence of certain PFCs in the soil and groundwater at former disposal sites in Washington County, Minnesota (Oakdale and Woodbury) and at the Company’s manufacturing facility at Cottage Grove, Minnesota. Under this agreement, the Company’s principal obligations include (i) evaluating releases of certain PFCs from these sites and proposing response actions; (ii) providing

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treatment or alternative drinking water upon identifying any level exceeding a Health Based Value (“HBV”) or Health Risk Limit (“HRL”) (i.e., the amount of a chemical in drinking water determined by the Minnesota Department of Health (MDH) to be safe for human consumption over a lifetime) for certain PFCs  for which a HBV and/or HRL exists as a result of contamination from these sites; (iii) remediating identified sources of other PFCs at these sites that are not controlled by actions to remediate PFOA and PFOS; and (iv) sharing information with the MPCA about certain perfluorinated compounds. During 2008, the MPCA issued formal decisions adopting remedial options for the former disposal sites in Washington County, Minnesota (Oakdale and Woodbury). In August 2009, the MPCA issued a formal decision adopting remedial options for the Company’s Cottage Grove manufacturing facility. During the spring and summer of 2010, 3M began implementing the agreed upon remedial options at the Cottage Grove and Woodbury sites. 3M commenced the remedial option at the Oakdale site in late 2010. At each location the remedial options were recommended by the Company and approved by the MPCA. Remediation work has been completed at the Oakdale and Woodbury sites, and they are in an operational maintenance mode. Remediation will continue at the Cottage Grove site during 2016.

In August 2014, the Illinois EPA approved a request by the Company to establish a groundwater management zone at its manufacturing facility in Cordova, Illinois, which includes ongoing pumping of impacted site groundwater, groundwater monitoring and routine reporting of results.

The Company cannot predict what additional regulatory actions arising from the foregoing proceedings and activities, if any, may be taken regarding such compounds or the consequences of any such actions.

Environmental Litigation

As previously reported, a former employee filed a purported class action lawsuit in 2002 in the Circuit Court of Morgan County, Alabama (the “St. John” case), seeking unstated damages and alleging that the plaintiffs suffered fear, increased risk, subclinical injuries, and property damage from exposure to certain perfluorochemicals at or near the Company’s Decatur, Alabama, manufacturing facility. The court in 2005 granted the Company’s motion to dismiss the named plaintiff’s personal injury-related claims on the basis that such claims are barred by the exclusivity provisions of the state’s Workers Compensation Act. The plaintiffs’ counsel filed an amended complaint in November 2006, limiting the case to property damage claims on behalf of a purported class of residents and property owners in the vicinity of the Decatur plant.In June 2015, the plaintiffs filed an amended complaint adding additional defendants, including BFI Waste Management Systems of Alabama, LLC; BFI Waste Management of North America, LLC; the City of Decatur, Alabama; Morgan County, Alabama; Municipal Utilities Board of Decatur; and Morgan County, Alabama, d/b/a Decatur Utilities. In September 2015, the court issued a scheduling order staying discovery pending mediation which occurred in January 2016, but did not resolve the case. Discovery relating to the class certification will begin, and the class certification hearing is scheduled for November 2016.

In 2005, the judge in a second purported class action lawsuit filed by three residents of Morgan County, Alabama, seeking unstated compensatory and punitive damages involving alleged damage to their property from emissions of certain perfluorochemical compounds from the Company’s Decatur, Alabama, manufacturing facility that formerly manufactured those compounds (the “Chandler” case) granted the Company’s motion to abate the case, effectively putting the case on hold pending the resolution of class certification issues in the St. John case. Despite the stay, plaintiffs filed an amended complaint seeking damages for alleged personal injuries and property damage on behalf of the named plaintiffs and the members of a purported class. No further action in the case is expected unless and until the stay is lifted.

In February 2009, a resident of Franklin County, Alabama, filed a purported class action lawsuit in the Circuit Court of Franklin County (the “Stover” case) seeking compensatory damages and injunctive relief based on the application by the Decatur utility’s wastewater treatment plant of wastewater treatment sludge to farmland and grasslands in the state that allegedly contain PFOA, PFOS and other perfluorochemicals. The named plaintiff seeks to represent a class of all persons within the State of Alabama who have had PFOA, PFOS, and other perfluorochemicals released or deposited on their property. In March 2010, the Alabama Supreme Court ordered the case transferred from Franklin County to Morgan County. In May 2010, consistent with its handling of the other matters, the Morgan County Circuit Court abated this case, putting it on hold pending the resolution of the class certification issues in the St. John case.

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In October 2015, West Morgan-East Lawrence Water & Sewer Authority (“Water Authority”) filed an individual complaint against 3M Company, Dyneon, L.L.C, and Daikin America, Inc., in the U.S. District Court for the Northern District of Alabama.  The complaint also includes representative plaintiffs who brought the complaint on behalf of themselves, and a class of all owners and possessors of property who use water provided by the Water Authority and five local water works to which the Water Authority supplies water (collectively, the “Water Utilities”).  The complaint seeks compensatory and punitive damages and injunctive relief based on allegations that the defendants’ chemicals, including PFOA and PFOS from their manufacturing processes in Decatur, have contaminated the water in the Tennessee River at the water intake, and that the chemicals cannot be removed by the water treatment processes utilized by the Water Authority.

In December 2010, the State of Minnesota, by its Attorney General Lori Swanson, acting in its capacity as trustee of the natural resources of the State of Minnesota, filed a lawsuit in Hennepin County District Court against 3M to recover damages (including unspecified assessment costs and reasonable attorney’s fees) for alleged injury to, destruction of, and loss of use of certain of the State’s natural resources under the Minnesota Environmental Response and Liability Act (MERLA) and the Minnesota Water Pollution Control Act (MWPCA), as well as statutory nuisance and common law claims of trespass, nuisance, and negligence with respect to the presence of PFCs in the groundwater, surface water, fish or other aquatic life, and sediments (the “NRD Lawsuit”). The State also seeks declarations under MERLA that 3M is responsible for all damages the State may suffer in the future for injuries to natural resources from releases of PFCs into the environment, and under MWPCA that 3M is responsible for compensation for future loss or destruction of fish, aquatic life, and other damages.

In November 2011, the Metropolitan Council filed a motion to intervene and a complaint in the NRD Lawsuit seeking compensatory damages and other legal, declaratory and equitable relief, including reasonable attorneys’ fees, for costs and fees that the Metropolitan Council alleges it will be required to assess at some time in the future if the MPCA imposes restrictions on Metropolitan Council’s PFOS discharges to the Mississippi River, including the installation and maintenance of a water treatment system. The Metropolitan Council’s intervention motion was based on several theories, including common law negligence, and statutory claims under MERLA for response costs, and under the Minnesota Environmental Rights Act (MERA) for declaratory and equitable relief against 3M for PFOS and other PFC pollution of the waters and sediments of the Mississippi River. 3M did not object to the motion to intervene. In January 2012, 3M answered the Metropolitan Council’s complaint and filed a counterclaim alleging that the Metropolitan Council discharges PFCs to the Mississippi River and discharges PFC-containing sludge and bio solids from one or more of its wastewater treatment plants onto agricultural lands and local area landfills. Accordingly, 3M requested that if the court finds that the State is entitled to any of the damages the State seeks, 3M seeks contribution and apportionment from the Metropolitan Council, including attorneys’ fees, under MERLA, and contribution from and liability for the Metropolitan Council’s proportional share of damages awarded to the State under the MWPCA, as well as under statutory nuisance and common law theories of trespass, nuisance, and negligence. 3M also seeks declaratory relief under MERA.

In April 2012, 3M filed a motion to disqualify the State of Minnesota’s counsel, Covington & Burling, LLP (Covington). In October 2012, the court granted 3M’s motion to disqualify Covington as counsel to the State and the State and Covington appealed the court’s disqualification to the Minnesota Court of Appeals. In July 2013, the Minnesota Court of Appeals affirmed the district court’s disqualification order. In October 2013, the Minnesota Supreme Court granted both the State’s and Covington’s petition for review of the decision of the Minnesota Court of Appeals. In April 2014, the Minnesota Supreme Court affirmed in part, reversed in part, and remanded the case to the district court for further proceedings. The district court took evidence on the disqualification issues at a hearing in October 2015. In February 2016, the district court ruled that Covington violated the professional ethics rule against representing a client (here the State of Minnesota) in the same or substantially related matter where that person’s interests are materially adverse to the interests of a former client (3M). The district court, however, denied 3M’s motion to disqualify Covington because it further found that 3M impliedly waived by delaying to assert the conflict. 3M is reviewing the district court’s opinion to determine next steps. Other activity in the case had been stayed pending the outcome of the disqualification issue. In a separate but related action, the Company filed suit against Covington for breach of its fiduciary duties to the Company and for breach of contract arising out of Covington’s representation of the State of Minnesota in the NRD Lawsuit.

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For environmental litigation matters described in this section for which a liability, if any, has been recorded, the Company believes the amount recorded, as well as the possible loss or range of loss in excess of the established accrual is not material to the Company’s consolidated results of operations or financial condition. For those matters for which a liability has not been recorded, the Company believes any such liability is not probable and estimable and the Company is not able to estimate a possible loss or range of loss at this time.

Environmental Liabilities and Insurance Receivables

As of December 31, 2015, the Company had recorded liabilities of $43 million for estimated “environmental remediation” costs based upon an evaluation of currently available facts with respect to each individual site and also recorded related insurance receivables of $11 million. The Company records liabilities for remediation costs on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies or the Company’s commitment to a plan of action. Liabilities for estimated costs of environmental remediation, depending on the site, are based primarily upon internal or third-party environmental studies, and estimates as to the number, participation level and financial viability of any other potentially responsible parties, the extent of the contamination and the nature of required remedial actions. The Company adjusts recorded liabilities as further information develops or circumstances change. The Company expects that it will pay the amounts recorded over the periods of remediation for the applicable sites, currently ranging up to 20 years.

As of December 31, 2015, the Company had recorded liabilities of $35 million for “other environmental liabilities” based upon an evaluation of currently available facts to implement the Settlement Agreement and Consent Order with the MPCA, the remedial action agreement with ADEM, and to address trace amounts of perfluorinated compounds in drinking water sources in the City of Oakdale, Minnesota, as well as presence in the soil and groundwater at the Company’s manufacturing facilities in Decatur, Alabama, and Cottage Grove, Minnesota, and at two former disposal sites in Washington County, Minnesota (Oakdale and Woodbury). The Company expects that most of the spending will occur over the next four years. As of December 31, 2015, the Company’s receivable for insurance recoveries related to “other environmental liabilities” was $15 million.

It is difficult to estimate the cost of environmental compliance and remediation given the uncertainties regarding the interpretation and enforcement of applicable environmental laws and regulations, the extent of environmental contamination and the existence of alternative cleanup methods. Developments may occur that could affect the Company’s current assessment, including, but not limited to: (i) changes in the information available regarding the environmental impact of the Company’s operations and products; (ii) changes in environmental regulations, changes in permissible levels of specific compounds in drinking water sources, or changes in enforcement theories and policies, including efforts to recover natural resource damages; (iii) new and evolving analytical and remediation techniques; (iv) success in allocating liability to other potentially responsible parties; and (v) the financial viability of other potentially responsible parties and third-party indemnitors. For sites included in both “environmental remediation liabilities” and “other environmental liabilities,” at which remediation activity is largely complete and remaining activity relates primarily to operation and maintenance of the remedy, including required post-remediation monitoring, the Company believes the exposure to loss in excess of the amount accrued would not be material to the Company’s consolidated results of operations or financial condition. However, for locations at which remediation activity is largely ongoing, the Company cannot estimate a possible loss or range of loss in excess of the associated established accruals for the reasons described above.

Other Matters

Commercial Litigation

3M sued TransWeb Corporation in Minnesota in 2010 for infringement of several 3M patents covering fluorination and hydrocharging of filter media used in 3M’s respirators and furnace filters. TransWeb filed a declaratory judgment action in and successfully moved the litigation to the U.S. District Court for the District of New Jersey, seeking a declaration of invalidity and non-infringement of 3M’s patents, and further alleging that 3M waited too long to enforce its rights. TransWeb also alleged 3M obtained the patents through inequitable conduct and that 3M’s attempt to enforce the patents constituted a violation of the antitrust laws. In November 2012, a jury returned a verdict in favor of TransWeb on all but

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one count, including findings that 3M’s patents were invalid and not infringed, and that 3M had committed an antitrust violation by seeking to enforce a patent it had obtained fraudulently. The jury also recommended that the court find 3M had committed inequitable conduct in obtaining the patents, and that the patents were therefore unenforceable. Since the vast majority of TransWeb’s claim for treble antitrust damages was in the form of its attorneys’ fees and expenses in connection with the defense of the patent case, the parties agreed that the measure of damages would not go to the jury, but rather would be submitted to a special master after the trial.  In April, 2014, the court issued an order denying 3M’s motions to set aside the jury’s verdict. In addition, the court found two 3M patents unenforceable due to inequitable conduct. The court accepted the special master’s recommendation as to the amount of attorneys’ fees to be awarded as damages, and entered judgment against 3M in the amount of approximately $26 million. In July 2014, 3M filed a notice of appeal of the judgment to the U.S. Court of Appeals for the Federal Circuit. On February 10, 2016, the U.S. Court of Appeals for the Federal Circuit issued its decision affirming the lower court’s judgment. 3M is reviewing the appellate court’s decision to determine next steps. The impact of the appellate court’s decision is not material to the Company’s consolidated results of operations or financial condition.

Product Liability Litigation

Électricité de France (EDF) filed a lawsuit against 3M France in the French courts in 2006 claiming commercial loss and property damage after experiencing electrical network failures which EDF claims were caused by allegedly defective 3M transition splices. The French Court of Appeals at Versailles affirmed the commercial trial court’s decision that the transition splices conformed to contract specifications and that EDF thoroughly analyzed and tested the splices before purchase and installation. The Court of Appeals, however, ordered a court-appointed expert to study the problem and issue a technical opinion on the cause of the network failures. The court-appointed expert submitted his report to the commercial court in May 2014. The expert found potential defects in 3M’s product and found that EDF incurred damages in excess of 100 million Euros. The expert’s opinion is not dispositive of liability or damages and is subject to numerous factual and legal challenges that will be raised with the court. The parties are briefing the court on their respective positions. Once the briefing is complete, the commercial court may take from six months to one year to render its decision.

One customer obtained an order in the French courts against 3M Purification SAS (a French subsidiary) in October 2011 appointing an expert to determine the amount of commercial loss and property damage allegedly caused by allegedly defective 3M filters used in the customer’s manufacturing process. An Austrian subsidiary of this same customer also filed a claim against 3M Austria GmbH (an Austrian subsidiary) and 3M Purification SAS in the Austrian courts in September 2012 seeking damages for the same issue. Those two cases are still pending. Another customer filed a lawsuit against 3M Deutschland GmbH (a German subsidiary) in the German courts in March 2012 seeking commercial loss and property damage allegedly caused by the same 3M filters used in that customer’s manufacturing process; the Company has resolved the claims in the German litigation. The Company has also settled without litigation the claims of two other customers arising out of the same issue. The amounts paid are not material to the Company’s consolidated results of operations or financial condition.

As of December 31, 2015, the Company is a named defendant in 122 lawsuits, most of which are pending in federal or state court in Minnesota, in which the plaintiffs claim they underwent various joint arthroplasty, cardiovascular, and other surgeries and later developed surgical site infections due to the use of the Bair Hugger™ patient warming system.  The U.S. Judicial Panel on Multidistrict Litigation granted the plaintiffs’ motion to transfer and consolidate all cases pending in federal courts to the U.S. District Court for the District of Minnesota to be managed in a multi-district proceeding during the pre-trial phase of the litigation.

The Bair Hugger™ product line was acquired by 3M as part of the 2010 acquisition of Arizant, Inc., a leadingmanufacturer of patient warming solutions designed to prevent hypothermia and maintain normal body temperature in surgical settings. No liability has been recorded for this matter because the Company believes that any such liability is not probable and estimable at this time.

For product liability litigation matters described in this section for which a liability has been recorded, the Company believes the amount recorded is not material to the Company’s consolidated results of operations or financial condition.

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In addition, the Company is not able to estimate a possible loss or range of loss in excess of the established accruals at this time.

NOTE 15. Stock-Based Compensation

The 3M 2008 Long-Term Incentive Plan provides for the issuance or delivery of up to 100 million shares of 3M common stock (including additional shareholder approvals subsequent to 2008) pursuant to awards granted under the plan. Awards under this plan may be issued in the form of incentive stock options, nonqualified stock options, progressive stock options, stock appreciation rights, restricted stock, restricted stock units, other stock awards, and performance units and performance shares. Awards denominated in shares of common stock other than options and stock appreciation rights, per the 2008 Plan, count against the 100 million share limit as 3.38 shares for every one share covered by such award (for full value awards with grant dates prior to May 11, 2010), as 2.87 shares for every one share covered by such award (for full value awards with grant dates on or after May 11, 2010, and prior to May 8, 2012), or as 3.50 shares for every one share covered by such award (for full value awards with grant dates of May 8, 2012 or later). The remaining total shares available for grant under the 2008 Long Term Incentive Plan Program are 20,328,681 as of December 31, 2015. There were approximately 9,200 participants with outstanding options, restricted stock, or restricted stock units at December 31, 2015.

The Company’s annual stock option and restricted stock unit grant is made in February to provide a strong and immediate link between the performance of individuals during the preceding year and the size of their annual stock compensation grants. The grant to eligible employees uses the closing stock price on the grant date. Accounting rules require recognition of expense under a non-substantive vesting period approach, requiring compensation expense recognition when an employee is eligible to retire. Employees are considered eligible to retire at age 55 and after having completed five years of service. This retiree-eligible population represents 35 percent of the 2015 annual stock-based compensation award expense dollars; therefore, higher stock-based compensation expense is recognized in the first quarter. 3M also has granted progressive (reload) options. These options are nonqualified stock options that were granted to certain participants under the 1997 or 2002 Management Stock Ownership Program, but for which the reload feature was eliminated in 2005 (on a prospective basis only).

In addition to the annual grants, the Company makes other minor grants of stock options, restricted stock units and other stock-based grants. The Company issues cash settled restricted stock units and stock appreciation rights in certain countries. These grants do not result in the issuance of common stock and are considered immaterial by the Company.

Amounts recognized in the financial statements with respect to stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees’ Stock Purchase Plan (GESPP), are provided in the following table. Capitalized stock-based compensation amounts were not material for the years ended 2015, 2014 and 2013.

Stock-Based Compensation Expense

	Years ended December 31
(Millions)	2015		2014		2013
Cost of sales	$	46	$	47	$	27
Selling, general and administrative expenses		185		192		183
Research, development and related expenses		45		41		30
Stock-based compensation expenses	$	276	$	280	$	240
Income tax benefits	$	(87)	$	(79)	$	(71)
Stock-based compensation expenses, net of tax	$	189	$	201	$	169

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Stock Option Program

The following table summarizes stock option activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
	Number of	Average		Number of	Average		Number of	Average
	Options	Exercise Price		Options	Exercise Price		Options	Exercise Price
Under option —
January 1	39,235,557	$	90.38	43,938,778	$	83.84	56,565,030	$	80.33
Granted:
Annual	5,529,544		165.91	5,736,183		126.77	6,220,810		101.55
Progressive (Reload)	—		—	—		—	140,447		109.83
Other	—		—	—		—	191		119.62
Exercised	(5,978,382)		83.74	(10,219,261)		82.37	(18,825,218)		79.25
Canceled	(234,274)		128.99	(220,143)		105.11	(162,482)		89.92
December 31	38,552,445	$	102.01	39,235,557	$	90.38	43,938,778	$	83.84
Options exercisable
December 31	27,262,062	$	85.97	27,502,208	$	81.42	32,038,228	$	79.58

Stock options vest over a period from one to three years with the expiration date at 10 years from date of grant. Outstanding options under grant include grants from previous plans. As of December 31, 2015, there was $69 million of compensation expense that has yet to be recognized related to non-vested stock option based awards. This expense is expected to be recognized over the remaining weighted-average vesting period of 21 months. For options outstanding at December 31, 2015, the weighted-average remaining contractual life was 66 months and the aggregate intrinsic value was $1.958 billion. For options exercisable at December 31, 2015, the weighted-average remaining contractual life was 52 months and the aggregate intrinsic value was $1.763 billion.

The total intrinsic values of stock options exercised during 2015, 2014 and 2013 was $465 million, $615 million and $562 million, respectively. Cash received from options exercised during 2015, 2014 and 2013 was $501 million, $842 million and $1.492 billion, respectively. The Company’s actual tax benefits realized for the tax deductions related to the exercise of employee stock options for 2015, 2014 and 2013 was $172 million, $226 million and $208 million, respectively.

The Company does not have a specific policy to repurchase common shares to mitigate the dilutive impact of options; however, the Company has historically made adequate discretionary purchases, based on cash availability, market trends, and other factors, to satisfy stock option exercise activity.

For annual and progressive (reload) options, the weighted average fair value at the date of grant was calculated using the Black-Scholes option-pricing model and the assumptions that follow. As discussed earlier, the progressive (reload) feature was eliminated in 2005, resulting in no activity in the below table for 2014 and thereafter.

Stock Option Assumptions

	Annual									Progressive (Reload)
	2015			2014			2013			2015			2014			2013
Exercise price	$	165.94		$	126.72		$	101.49		$	—		$	—		$	109.84
Risk-free interest rate		1.5	%		1.9	%		1.2	%		—	%		—	%		0.2	%
Dividend yield		2.5	%		2.6	%		2.7	%		—	%		—	%		2.7	%
Volatility		20.1	%		20.8	%		20.0	%		—	%		—	%		16.3	%
Expected life (months)		76			75			75			—			—			12
Black-Scholes fair value	$	23.98		$	19.63		$	13.46		$	—		$	—		$	6.42

Expected volatility is a statistical measure of the amount by which a stock price is expected to fluctuate during a period. For the 2015 annual grant date, the Company estimated the expected volatility based upon the average of the most recent

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one year volatility, the median of the term of the expected life rolling volatility, the median of the most recent term of the expected life volatility of 3M stock, and the implied volatility on the grant date. The expected term assumption is based on the weighted average of historical grants.

Restricted Stock and Restricted Stock Units

The following table summarizes restricted stock and restricted stock unit activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Number of	Grant Date		Number of	Grant Date		Number of	Grant Date
	Awards	Fair Value		Awards	Fair Value		Awards	Fair Value
Nonvested balance —
As of January 1	2,817,786	$	104.41	3,105,361	$	92.31	3,261,562	$	85.17
Granted
Annual	671,204		165.86	798,615		126.79	946,774		101.57
Other	26,886		156.94	78,252		152.74	44,401		111.19
Vested	(1,010,612)		89.99	(1,100,675)		90.37	(1,100,095)		79.93
Forfeited	(64,176)		118.99	(63,767)		97.23	(47,281)		90.82
As of December 31	2,441,088	$	127.47	2,817,786	$	104.41	3,105,361	$	92.31

As of December 31, 2015, there was $84 million of compensation expense that has yet to be recognized related to non-vested restricted stock and restricted stock units. This expense is expected to be recognized over the remaining weighted-average vesting period of 24 months. The total fair value of restricted stock and restricted stock units that vested during the years ended December 31, 2015, 2014 and 2013 was $166 million, $145 million and $114 million, respectively. The Company’s actual tax benefits realized for the tax deductions related to the vesting of restricted stock and restricted stock units for the years ended December 31, 2015, 2014 and 2013 was $62 million, $54 million and $43 million, respectively.

Restricted stock units granted under the 3M 2008 Long-Term Incentive Plan generally vest three years following the grant date assuming continued employment. Dividend equivalents equal to the dividends payable on the same number of shares of 3M common stock accrue on these restricted stock units during the vesting period, although no dividend equivalents are paid on any of these restricted stock units that are forfeited prior to the vesting date. Dividends are paid out in cash at the vest date on restricted stock units, except for performance shares which do not earn dividends. Since the rights to dividends are forfeitable, there is no impact on basic earnings per share calculations. Weighted average restricted stock unit shares outstanding are included in the computation of diluted earnings per share.

Performance Shares

Instead of restricted stock units, the Company makes annual grants of performance shares to members of its executive management. The 2015 performance criteria for these performance shares (organic volume growth, return on invested capital, free cash flow conversion, and earnings per share growth) were selected because the Company believes that they are important drivers of long-term stockholder value. The number of shares of 3M common stock that could actually be delivered at the end of the three-year performance period may be anywhere from 0% to 200% of each performance share granted, depending on the performance of the Company during such performance period. Non-substantive vesting requires that expense for the performance shares be recognized over one or three years depending on when each individual became a 3M executive. Performance shares do not accrue dividends during the performance period. Therefore, the grant date fair value is determined by reducing the closing stock price on the date of grant by the net present value of dividends during the performance period.

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The following table summarizes performance share activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Number of	Grant Date		Number of	Grant Date		Number of	Grant Date
	Awards	Fair Value		Awards	Fair Value		Awards	Fair Value
Undistributed balance —
As of January 1	1,099,752	$	102.65	895,635	$	88.12	1,089,084	$	79.27
Granted	227,798		158.88	305,225		124.89	353,734		96.87
Distributed	(323,938)		83.08	(277,358)		84.74	(507,083)		75.16
Performance change	(106,760)		127.70	212,461		109.74	(6,949)		77.01
Forfeited	(25,660)		125.33	(36,212)		109.44	(33,151)		91.34
As of December 31	871,192	$	120.89	1,099,752	$	102.65	895,635	$	88.12

As of December 31, 2015, there was $17 million of compensation expense that has yet to be recognized related to performance shares. This expense is expected to be recognized over the remaining weighted-average earnings period of 10 months. During the years ended December 31, 2015, 2014 and 2013, the total fair value of performance shares that were distributed were $54 million, $35 million and $52 million, respectively. The Company’s actual tax benefits realized for the tax deductions related to the distribution of performance shares for the years ended December 31, 2015, 2014 and 2013 was $15 million, $11 million and $16 million, respectively.

General Employees’ Stock Purchase Plan (GESPP):

As of December 31, 2015, shareholders have approved 60 million shares for issuance under the Company’s GESPP. Substantially all employees are eligible to participate in the plan. Participants are granted options at 85% of market value at the date of grant. There are no GESPP shares under option at the beginning or end of each year because options are granted on the first business day and exercised on the last business day of the same month.

General Employees’ Stock Purchase Plan

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Shares	Exercise Price		Shares	Exercise Price		Shares	Exercise Price
Options granted	1,007,669	$	133.52	1,073,956	$	118.73	1,259,247	$	93.46
Options exercised	(1,007,669)		133.52	(1,073,956)		118.73	(1,259,247)		93.46
Shares available for grant - December 31	28,104,335			29,112,004			30,185,960

The weighted-average fair value per option granted during 2015, 2014 and 2013 was $23.56,  $20.95 and $16.49, respectively. The fair value of GESPP options was based on the 15% purchase price discount. The Company recognized compensation expense for GESSP options of $24 million in 2015, $22 million in 2014 and $21 million in 2013.

NOTE 16. Business Segments

3M’s businesses are organized, managed and internally grouped into segments based on differences in markets, products, technologies and services. 3M manages its operations in five business segments: Industrial; Safety and Graphics; Health Care; Electronics and Energy; and Consumer. 3M’s five business segments bring together common or related 3M technologies, enhancing the development of innovative products and services and providing for efficient sharing of business resources. Transactions among reportable segments are recorded at cost. 3M is an integrated enterprise characterized by substantial intersegment cooperation, cost allocations and inventory transfers. Therefore, management does not represent that these segments, if operated independently, would report the operating income information shown. The difference between operating income and pre-tax income relates to interest income and interest expense, which are not allocated to business segments.

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Effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions.

Business Segment Products

Business Segment	Major Products
Industrial	Tapes, coated, nonwoven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, filtration products, closure systems for personal hygiene products, acoustic systems products, automotive components, abrasion-resistant films, structural adhesives and paint finishing and detailing products
Safety and Graphics	Personal protection products, traffic safety and security products, commercial graphics systems, commercial cleaning and protection products, floor matting, roofing granules for asphalt shingles, and fall protection products
Health Care	Medical and surgical supplies, skin health and infection prevention products, drug delivery systems, dental and orthodontic products, health information systems and food safety products
Electronics and Energy	Optical films solutions for electronic displays, packaging and interconnection devices, insulating and splicing solutions for the electronics, telecommunications and electrical industries, touch screens and touch monitors, renewable energy component solutions, and infrastructure protection products
Consumer	Sponges, scouring pads, high-performance cloths, consumer and office tapes, repositionable notes, indexing systems, construction and home improvement products, home care products, protective material products, and consumer and office tapes and adhesives

Business Segment Information

	Net Sales						Operating Income
(Millions)	2015		2014		2013		2015		2014		2013
Industrial	$	10,328	$	10,990	$	10,657	$	2,263	$	2,389	$	2,307
Safety and Graphics		5,515		5,732		5,584		1,305		1,296		1,227
Health Care		5,420		5,572		5,334		1,724		1,724		1,672
Electronics and Energy		5,220		5,604		5,393		1,102		1,115		954
Consumer		4,422		4,523		4,435		1,046		995		945
Corporate and Unallocated		1		4		8		(355)		(251)		(321)
Elimination of Dual Credit		(632)		(604)		(540)		(139)		(133)		(118)
Total Company	$	30,274	$	31,821	$	30,871	$	6,946	$	7,135	$	6,666

	Assets						Depreciation & Amortization						Capital Expenditures
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014		2013
Industrial	$	9,203	$	8,508	$	8,833	$	374	$	383	$	373	$	317	$	395	$	511
Safety and Graphics		7,564		4,939		5,122		245		234		255		199		221		207
Health Care		4,403		4,344		4,329		179		181		171		168		169		120
Electronics and Energy		4,815		5,116		5,336		291		271		260		211		232		261
Consumer		2,393		2,434		2,516		108		108		106		124		111		128
Corporate and Unallocated		4,340		5,868		7,168		238		231		206		442		365		438
Total Company	$	32,718	$	31,209	$	33,304	$	1,435	$	1,408	$	1,371	$	1,461	$	1,493	$	1,665

Corporate and unallocated operating income includes a variety of miscellaneous items, such as corporate investment gains and losses, certain derivative gains and losses, certain insurance-related gains and losses, certain litigation and environmental expenses, corporate restructuring charges and certain under- or over-absorbed costs (e.g. pension, stock-based compensation) that the Company may choose not to allocate directly to its business segments. Because this category includes a variety of miscellaneous items, it is subject to fluctuation on a quarterly and annual basis.

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3M business segment reporting measures include dual credit to business segments for certain U.S. sales and related operating income. Management evaluates each of its five business segments based on net sales and operating income performance, including dual credit U.S. reporting to further incentivize U.S. sales growth. As a result, 3M provides additional (“dual”) credit to those business segments selling products in the U.S. to an external customer when that segment is not the primary seller of the product. For example, certain respirators are primarily sold by the Personal Safety Division within the Safety and Graphics business segment; however, the Industrial business segment also sells this product to certain customers in its U.S. markets. In this example, the non-primary selling segment (Industrial) would also receive credit for the associated net sales it initiated and the related approximate operating income. The assigned operating income related to dual credit activity may differ from operating income that would result from actual costs associated with such sales. The offset to the dual credit business segment reporting is reflected as a reconciling item entitled “Elimination of Dual Credit,” such that sales and operating income for the U.S. in total are unchanged.

NOTE 17.  Geographic Areas

Geographic area information is used by the Company as a secondary performance measure to manage its businesses. Export sales and certain income and expense items are generally reported within the geographic area where the final sales to 3M customers are made.

													Property, Plant and
	Net Sales						Operating Income						Equipment - net
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014
United States	$	12,049	$	11,714	$	11,151	$	2,647	$	2,540	$	2,210	$	4,838	$	4,619
Asia Pacific		9,041		9,418		9,047		2,580		2,487		2,386		1,647		1,798
Europe, Middle East and Africa		6,228		7,198		7,085		1,017		1,234		1,168		1,531		1,502
Latin America and Canada		2,982		3,504		3,611		706		867		908		499		570
Other Unallocated		(26)		(13)		(23)		(4)		7		(6)		—		—
Total Company	$	30,274	$	31,821	$	30,871	$	6,946	$	7,135	$	6,666	$	8,515	$	8,489

Asia Pacific included China/Hong Kong net sales to customers of $2.945 billion in 2015, which approached10 percent of consolidated worldwide sales. China/Hong Kong net property, plant and equipment (PP&E) was$584 million at December 31, 2015.

NOTE 18.  Quarterly Data (Unaudited)

(Millions, except per-share amounts)	First		Second		Third		Fourth		Year
2015	Quarter		Quarter		Quarter		Quarter		2015
Net sales	$	7,578	$	7,686	$	7,712	$	7,298	$	30,274
Cost of sales		3,821		3,858		3,877		3,827		15,383
Net income including noncontrolling interest		1,201		1,303		1,298		1,039		4,841
Net income attributable to 3M		1,199		1,300		1,296		1,038		4,833
Earnings per share attributable to 3M common shareholders - basic		1.88		2.06		2.09		1.69		7.72
Earnings per share attributable to 3M common shareholders - diluted		1.85		2.02		2.05		1.66		7.58

(Millions, except per-share amounts)	First		Second		Third		Fourth		Year
2014	Quarter		Quarter		Quarter		Quarter		2014
Net sales	$	7,831	$	8,134	$	8,137	$	7,719	$	31,821
Cost of sales		4,031		4,184		4,205		4,027		16,447
Net income including noncontrolling interest		1,225		1,283		1,311		1,179		4,998
Net income attributable to 3M		1,207		1,267		1,303		1,179		4,956
Earnings per share attributable to 3M common shareholders - basic		1.83		1.94		2.02		1.85		7.63
Earnings per share attributable to 3M common shareholders - diluted		1.79		1.91		1.98		1.81		7.49

Gross profit is calculated as net sales minus cost of sales.

Refer to Note 4 for discussion of “Restructuring Actions”,which reduced diluted earnings per share by $0.14 in the fourth quarter of 2015.

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Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None.

Item 9A. Controls and Procedures.

a. The Company carried out an evaluation, under the supervision and with the participation of its management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the Company’s “disclosure controls and procedures” (as defined in the Exchange Act Rule 13a-15(e)) as of the end of the period covered by this report. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures are effective.

b. The Company’s management is responsible for establishing and maintaining an adequate system of internal control over financial reporting, as defined in the Exchange Act Rule 13a-15(f). Management conducted an assessment of the Company’s internal control over financial reporting based on the framework established by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control — Integrated Framework (2013). Based on the assessment, management concluded that, as of December 31, 2015, the Company’s internal control over financial reporting is effective. Management’s assessment of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2015 excluded Capital Safety Group S.A.R.L. and Polypore International, Inc.’s Separation Media Business, which were both acquired by the Company in August 2015 in purchase business combinations. These acquired businesses’ total assets and total net sales, in the aggregate, represented less than 2 percent and less than 1 percent, respectively, of the Company’s consolidated financial statement amounts as of and for the year ended December 31, 2015. Companies are allowed to exclude acquisitions from their assessment of internal control over financial reporting during the first year of acquisition while integrating the acquired company under guidelines established by the Securities and Exchange Commission. The Company’s internal control over financial reporting as of December 31, 2015 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which is included herein, which expresses an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2015.

c. There was no change in the Company’s internal control over financial reporting that occurred during the Company’s most recently completed fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

The Company is implementing an enterprise resource planning (“ERP”) system on a worldwide basis, which is expected to improve the efficiency of certain financial and related transaction processes. The gradual implementation is expected to occur in phases over the next several years. The implementation of a worldwide ERP system will likely affect the processes that constitute our internal control over financial reporting and will require testing for effectiveness.

The Company completed implementation with respect to elements of certain processes/sub-processes in limited subsidiaries/locations and will continue to roll-out the ERP system over the next several years. As with any new information technology application we implement, this application, along with the internal controls over financial reporting included in this process, was appropriately considered within the testing for effectiveness with respect to the implementation in these instances. We concluded, as part of our evaluation described in the above paragraphs, that the implementation of ERP in these circumstances has not materially affected our internal control over financial reporting.

Item 9B. Other Information.

None.

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PART III

Documents Incorporated by Reference

In response to Part III, Items 10, 11, 12, 13 and 14, parts of the Company’s definitive proxy statement (to be filed pursuant to Regulation 14A within 120 days after Registrant’s fiscal year-end of December 31, 2015) for its annual meeting to be held on May 10, 2016, are incorporated by reference in this Form 10-K.

Item 10. Directors, Executive Officers and Corporate Governance.

The information relating to directors and nominees of 3M is set forth under the caption “Proposal No. 1” in 3M’s proxy statement for its annual meeting of stockholders to be held on May 10, 2016 (“3M Proxy Statement”) and is incorporated by reference herein. Information about executive officers is included in Item 1 of this Annual Report on Form 10-K. The information required by Items 405, 407(c)(3), (d)(4) and (d)(5) of Regulation S-K is contained under the captions “Section 16(a) Beneficial Ownership Reporting Compliance,” “Corporate Governance At 3M  — Identification, Evaluation, and Selection of Nominees,,” “—Nominees Proposed By Stockholders For Consideration By the Committee,”  “—Stockholder Nominations” and “—Role of the Nominating and Governance Committee”  and “Corporate Governance At 3M -- Board and Committee Information – Audit Committee” of the 3M Proxy Statement and such information is incorporated by reference herein.

Code of Ethics. All of our employees, including our Chief Executive Officer, Chief Financial Officer and Chief Accounting Officer and Controller, are required to abide by 3M’s long-standing business conduct policies to ensure that our business is conducted in a consistently legal and ethical manner. 3M has posted the text of such code of ethics on its website (http://www.3M.com/businessconduct). At the same website, any future amendments to the code of ethics will also be posted. Any person may request a copy of the code of ethics, at no cost, by writing to us at the following address:

3M Company

3M Center, Building 220-11W-09

St. Paul, MN  55144-1000

Attention: Vice President, Compliance and Business Conduct

Item 11. Executive Compensation.

The information required by Item 402 of Regulation S-K is contained under the captions “Executive Compensation” (excluding the information under the caption “— Compensation Committee Report”) and “Director Compensation and Stock Ownership Guidelines” of the 3M Proxy Statement. Such information is incorporated by reference.

The information required by Items 407(e)(4) and (e)(5) of Regulation S-K is contained in the “Executive Compensation” section under the captions “Compensation Committee Report”and “Compensation Committee Interlocks and Insider Participation” of the 3M Proxy Statement. Such information (other than the Compensation Committee Report, which shall not be deemed to be “filed”) is incorporated by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information relating to security ownership of certain beneficial owners and management is set forth under the designation “Security Ownership of Management” and “Security Ownership of Certain Beneficial Owners” in the 3M Proxy Statement and such information is incorporated by reference herein.

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Equity compensation plans information as of December 31, 2015 follows:

Equity Compensation Plans Information (1)

	A	B		C
	Number of	Weighted-		Number of securities
	securities to be	average exercise		remaining available for
	issued upon	price of		future issuance under
	exercise of	outstanding		equity compensation
	outstanding	options,		plans (excluding
	options, warrants	warrants and		securities reflected in
Plan Category	and rights	rights		column (A))
Equity compensation plans approved by security holders
Stock options	38,522,445	$	102.01	—
Restricted stock units	2,441,088			—
Performance shares	871,192			—
Non-employee director deferred stock units	241,156			—
Total	42,075,881			20,328,681
Employee stock purchase plan	—			28,104,335
Subtotal	42,075,881			48,433,016
Total	42,075,881			48,433,016

(1) In column B, the weighted-average exercise price is only applicable to stock options. In column C, the number of securities remaining available for future issuance for stock options, restricted stock units, and stock awards for non-employee directors is approved in total and not individually with respect to these items.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

With respect to certain relationships and related transactions as set forth in Item 404 of Regulation S-K, no matters require disclosure with respect to transactions with related persons. The information required by Item 404(b) and Item 407(a) of Regulation S-K is contained under the section “Corporate Governance at 3M” under the captions “Director Independence” and “Related Person Transaction Policy and Procedures” of the 3M Proxy Statement and such information is incorporated by reference herein.

Item 14. Principal Accounting Fees and Services.

The information relating to principal accounting fees and services is set forth in the section entitled “Audit Committee Matters” under the designation “Audit Committee Policy on Pre-Approval of Audit and Permissible Non-Audit Services of the Independent Accounting Firm” and “Fees of the Independent Accounting Firm” in the 3M Proxy Statement and such information is incorporated by reference herein.

120

PART IV

Item 15. Exhibits, Financial Statement Schedules.

(a) (1) Financial Statements. The consolidated financial statements filed as part of this report are listed in the index to financial statements on page 47 as follows:

	Page Number
Report of Independent Registered Public Accounting Firm	49
Consolidated Statement of Income for the years ended December 31, 2015, 2014 and 2013	50
Consolidated Statement of Comprehensive Income for the years ended December 31, 2015, 2014 and 2013	51
Consolidated Balance Sheet at December 31, 2015 and 2014	52
Consolidated Statement of Changes in Equity for the years ended December 31, 2015, 2014 and 2013	53
Consolidated Statement of Cash Flows for the years ended December 31, 2015, 2014 and 2013	54
Notes to Consolidated Financial Statements	55-117

(a) (2) Financial Statement Schedules. Financial statement schedules are omitted because of the absence of the conditions under which they are required or because the required information is included in the Consolidated Financial Statements or the notes thereto. The financial statements of unconsolidated subsidiaries are omitted because, considered in the aggregate, they would not constitute a significant subsidiary.

(a) (3) Exhibits. The exhibits are either filed with this report or incorporated by reference into this report. Exhibit numbers 10.1 through 10.29 are management contracts or compensatory plans or arrangements. See (b) Exhibits, which follow.

(b) Exhibits.

(3)Articles of Incorporation and bylaws

(3.1)	Certificate of incorporation, as amended as of May 11, 2007, is incorporated by reference from our Form 8-K dated May 14, 2007.
(3.2)	Amended and Restated Bylaws, as adopted as of November 10, 2015, are incorporated by reference from our Form 8-K dated November 10, 2015.

(4)Instruments defining the rights of security holders, including indentures:

(4.1)	Indenture, dated as of November 17, 2000, between 3M and The Bank of New York Mellon Trust Company, N.A., as successor trustee, with respect to 3M’s senior debt securities, is incorporated by reference from our Form 8-K dated December 7, 2000.
(4.2)	First Supplemental Indenture, dated as of July29, 2011, to Indenture dated as of November17, 2000, between 3M and The Bank of New York Mellon Trust Company, N.A., as successor trustee, with respect to 3M’s senior debt securities, is incorporated by reference from our Form10-Q for the quarter ended June30, 2011.

(10)Material contracts and management compensation plans and arrangements:

(10.1)	3M 2008 Long-Term Incentive Plan (including amendments through February 2,2016) is filed herewith.
(10.2)	Form of Agreement for Stock Option Grants to Executive Officers under 3M 2008 Long-Term Incentive Plan is incorporated by reference from our Form 8-K dated May13, 2008.

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(10.3)	Form of Stock Option Agreement for options granted to Executive Officers under the 3M 2008 Long-Term Incentive Plan, commencing February 9, 2010, is incorporated by reference from our Form 10-K for the year ended December 31, 2009.
(10.4)	Form of Restricted Stock Unit Agreement for restricted stock units granted to Executive Officers under the 3M Long-Term Incentive Plan, effective February 9, 2010, is incorporated by reference from our Form 10-K for the year ended December 31, 2009.
(10.5)	Form of 3M 2010 Performance Share Award under the 3M 2008 Long-Term Incentive Plan is incorporated by reference from our Form 8-K dated March 4, 2010.
(10.6)	Form of Stock Option Agreement for U.S. Employees under 3M 2008 Long-Term Incentive Plan is incorporated by reference from our Form 10-K for the year ended December 31, 2008.
(10.7)	Form of Restricted Stock Unit Agreement for U.S. Employees under 3M 2008 Long-Term Incentive Plan is incorporated by reference from our Form 10-K for the year ended December 31, 2008.
(10.8)	3M 2005 Management Stock Ownership Program (including amendments through February 2,2016) is filed herewith.
(10.9)	Form of award agreement for non-qualified stock options granted under the 2005 Management Stock Ownership Program, is incorporated by reference from our Form 8-K dated May 16, 2005.
(10.10)	3M VIP Excess Plan is incorporated by reference from our Form 8-K dated November 14, 2008.
(10.11)	Amendment of 3M VIP Excess Plan is incorporated by reference from our Form 8-K dated November 24, 2009.
(10.12)	3M VIP (Voluntary Investment Plan) Plus is incorporated by reference from Registration Statement No. 333-73192 on Form S-8, filed on November 13, 2001.
(10.13)	Amendment of 3M VIP Plus is incorporated by reference from our Form 8-K dated November 14, 2008.
(10.14)	3M Deferred Compensation Plan, as amended through February 2008, is incorporated by reference from our Form 8-K dated February 14, 2008.
(10.15)	Amendment of 3M Deferred Compensation Plan is incorporated by reference from our Form 8-K dated November 14, 2008.
(10.16)	3M Deferred Compensation Excess Plan is incorporated by reference from our Form 10-K for the year ended December 31, 2009.
(10.17)	3M Performance Awards Deferred Compensation Plan is incorporated by reference from our Form 10-K for the year ended December 31, 2009.
(10.18)	3M Executive Annual Incentive Plan is incorporated by reference from our Form 8-K dated May 14, 2007.
(10.19)	Description of changes to 3M Compensation Plan for Non-Employee Directors is incorporated by reference from our Form 8-K dated August 8, 2005.
(10.20)	3M Compensation Plan for Non-Employee Directors, as amended, through November 8, 2004, is incorporated by reference from our Form 10-K for the year ended December 31, 2004.
(10.21)	Amendment of 3M Compensation Plan for Non-Employee Directors is incorporated by reference from our Form 8-K dated November 14, 2008.
(10.22)	Amendment of 3M Compensation Plan for Non-Employee Directors as of August 12,2013, is incorporated by reference from our Form 10-Q for the quarter ended September 30, 2013.
(10.23)	3M Executive Life Insurance Plan, as amended, is incorporated by reference from our Form 10-K for the year ended December 31, 2003.
(10.24)	Summary of Personal Financial Planning Services for 3M Executives is incorporated by reference from our Form 10-K for the year ended December 31, 2003.
(10.25)	3M policy on reimbursement of incentive payments is incorporated by reference from our Form 10-K for the year ended December 31, 2006.
(10.26)	Amended and Restated 3M Nonqualified Pension Plan I is incorporated by reference from our Form 8-K dated December 23, 2008.
(10.27)	Amended and Restated 3M Nonqualified Pension Plan II is incorporated by reference from our Form 8-K dated December 23, 2008.
(10.28)	3M Nonqualified Pension Plan III is incorporated by reference from our Form 8-K dated November 14, 2008.
(10.29)	Policy on Reimbursement of Incentive Compensation (effective May 11, 2010) is incorporated by reference from our Form 10-Q dated August 4, 2010.

122

(10.30)	Amended and restated five-year credit agreement as of August 5, 2014, is incorporated by reference from our Form 8-K dated August 8, 2014.
(10.31)	Registration Rights Agreement as of August 4, 2009, between 3M Company and State Street Bank and Trust Company as Independent Fiduciary of the 3M Employee Retirement Income Plan, is incorporated by reference from our Form 8-K dated August 5, 2009.

Filed herewith, in addition to items, if any, specifically identified above:

(12)	Calculation of ratio of earnings to fixed charges.
(18)	Preferability letter regarding change in accounting principles.
(21)	Subsidiaries of the Registrant.
(23)	Consent of independent registered public accounting firm.
(24)	Power of attorney.
(31.1)	Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350.
(31.2)	Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350.
(32.1)	Certification of the Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350.
(32.2)	Certification of the Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350.
(95)	Mine Safety Disclosures.
(101)	The following financial information from 3M Company’s Annual Report on Form 10-K for the period ended December 31, 2015, filed with the SEC on February 11, 2016, formatted in Extensible Business Reporting Language (XBRL): (i) the Consolidated Statement of Income for the years ended December 31, 2015, 2014 and 2013, (ii) the Consolidated Statement of Comprehensive Income for the years ended December 31, 2015, 2014 and 2013, (iii) the Consolidated Balance Sheet at December 31, 2015 and 2014, (iv) the Consolidated Statement of Changes in Equity for the years ended December 31, 2015, 2014 and 2013, (v) the Consolidated Statement of Cash Flows for the years ended December 31, 2015, 2014 and 2013, and (vi) Notes to Consolidated Financial Statements.

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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.

3M COMPANY
By	/s/  Nicholas C. Gangestad
	Nicholas C. Gangestad,
Senior Vice President and Chief Financial Officer
(Principal Financial Officer)
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 indicated on February 11, 2016.

Signature	Title
Inge G. Thulin	Chairman of the Board, President and Chief Executive Officer (Principal Executive Officer and Director)
Eric D. Hammes	Vice President, Controller and Chief Accounting Officer (Principal Accounting Officer)
Linda G. Alvarado	Director
Sondra L. Barbour	Director
Thomas K. Brown	Director
Vance D. Coffman	Director
David B. Dillon	Director
Michael L. Eskew	Director
Herbert L. Henkel	Director
Muhtar Kent	Director
Edward M. Liddy	Director
Gregory R. Page	Director
Robert J. Ulrich	Director

Nicholas C. Gangestad, by signing his name hereto, does hereby sign this document pursuant to powers of attorney duly executed by the other persons named, filed with the Securities and Exchange Commission on behalf of such other persons, all in the capacities and on the date stated, such persons constituting a majority of the directors of the Company.

By	/s/ Nicholas C. Gangestad
Nicholas C. Gangestad, Attorney-in-Fact

124

EX-10.1

EXHIBIT 10.1

(Including amendments

through February 2, 2016)

3M 2008 LONG-TERM INCENTIVE PLAN

1.Purposes.

The purposes of this plan are to help 3M attract, retain and motivate outstanding employees to increase shareholder value by contributing to the long-term growth and success of its business; to more closely align the financial interests of these employees with those of 3M’s other shareholders by linking a significant portion of their compensation to the performance of the Company and its stock price; to encourage employees to acquire an equity stake in the Company; to help 3M attract and retain well-qualified individuals to serve as nonemployee members of its Board of Directors; and to promote the alignment of interests of these nonemployee directors with those of 3M’s other shareholders by providing all or a portion of their compensation for serving as directors in the form of 3M common stock.

This plan is intended to replace and succeed the 2005 Management Stock Ownership Program, the 3M Performance Unit Plan, and the 1992 Directors Stock Ownership Program.

2.Definitions.

(a)“Affiliate” means any entity that is directly or indirectly controlled by the Company or in which the Company has a significant equity interest, as determined by the Committee.

(b)“Award” means any Incentive Stock Option, Nonqualified Stock Option, Progressive Stock Option, Stock Appreciation Right, Restricted Stock, Restricted Stock Unit, Performance Unit, Performance Share or other Stock Award granted to a Participant under this Plan.

(c)“Code” means the Internal Revenue Code of 1986, as amended.

(d)“Committee” means the Compensation Committee of 3M’s Board of Directors.

(e)“Common Stock” means the common stock of 3M Company with a par value of $0.01 per share.

(f)“Company” means 3M Company, a Delaware corporation.

(g)“Disqualifying Termination” means a termination of a Participant’s employment with the Company or an Affiliate due to (i) a material violation of any policy of the Company or such Affiliate, including, without limitation, any of the Company’s Business Conduct Policies, or (ii) embezzlement from or theft of property belonging to the Company or such Affiliate.

(h)“Dividend Equivalents” means, on any dividend record date, that amount of cash or shares equal in value to the dividend payable on shares of Common Stock as declared by 3M’s Board of Directors with respect to such dividend record date.

(i)“Fair Market Value” means the closing price for a share of Common Stock as reported on the New York Stock Exchange Composite Transactions.

(j)“Full Value Award” means any Award denominated or paid in shares of Common Stock other than an Option or Stock Appreciation Right.

(k)“Grant Date” means the effective date of an Award granted to a Participant under this Plan.

(l)“Incentive Stock Option” means an Option granted under this Plan which satisfies the requirements of section 422 of the Code and is so designated in the written or electronic documents evidencing such Option.

(m)“Nonqualified Stock Option” means an Option granted under this Plan which is not an Incentive Stock Option.

(n)“Option” means a Participant’s right to purchase a specified number of shares of Common Stock at a specified price for a specified period of time.

(o)“Participant” means an employee of the Company or an Affiliate whose participation in the Plan has been approved by the Committee, or a nonemployee member of 3M’s Board of Directors.

(p)“Performance Criteria” means such internal performance criteria for the Company or any business segment thereof as determined by the Committee with respect to each Performance Unit or Performance Share and may include any one or more of several criteria, such as, but not limited to, return on capital employed, return on assets or net assets, net sales, sales growth, sales or sales growth from new products, market share, cash flow or cash flow conversion, earnings per share, return on equity, stock price, gross margin or income, operating margin or income, total shareholder return, stockholders’ equity, retained earnings, economic value added, economic profit (after-tax operating income, excluding non-recurring items, less the cost of capital), earnings before interest and taxes, EBITDA, operating income, improvements in certain asset or financial measures (including working capital, the ratio of sales to net working capital and the ratio of debt to equity or to EBITDA), reductions in certain asset or cost areas (including reductions in inventories or accounts receivable or reductions in laboratory, engineering, sales or administrative costs) or in debt, net income or variations of income criteria in varying time periods, adjusted net income, employee diversity, employee engagement or satisfaction, customer satisfaction, or general comparisons with other peer companies or industry groups or classifications with regard to one or more of these criteria.  The criteria may measure performance on the basis of either the amount of a particular item during the Performance Period or on increases or decreases in the amount of such item during the Performance Period.  Such criteria shall include a target for payment of the Performance Unit or Performance Share at full face value and upper and lower limits for the measurement of payment to Participants.

(q)“Performance Period” means a period of three years, unless determined otherwise by the Committee in its discretion, during which period or any portion thereof the Performance Criteria shall be measured for purposes of calculating the payment with respect to each Performance Unit or Performance Share.

(r)“Performance Share” means the right of a Participant to receive a payment in the form of shares of Common Stock based upon the performance of the Company during a Performance Period as measured by the Performance Criteria approved by the Committee.

(s)“Performance Unit” means the right of a Participant to receive a payment in cash or shares of Common Stock based upon the performance of the Company during a Performance Period as measured by the Performance Criteria approved by the Committee.

(t)“Plan” means this 3M 2008 Long-Term Incentive Plan.

(u)“Predecessor Plan” means the 1997 Management Stock Ownership Program, the 2002 Management Stock Ownership Program, and the 2005 Management Stock Ownership Program.

(v)“Progressive Stock Option” means a Nonqualified Stock Option granted to a Participant under this Plan upon the exercise of a nonqualified stock option granted under the 1997 or the 2002 Management Stock Ownership Programs where such Participant makes payment for all or part of the purchase price and withholding taxes in shares of Common Stock.

(w)"Restricted Period"means that period of time determined by the Committee during which a Participant shall not be permitted to sell or transfer shares of Restricted Stock granted under this Plan, and during which a Participant’s interest in Restricted Stock Units or Restricted Stock granted under this Plan remains subject to forfeiture.  Unless otherwise determined by the Committee, any time-based Restricted Period shall be at least three years.

2

(x)"Restricted Stock"means shares of Common Stock granted to a Participant under the Plan subject to certain restrictions during the Restricted Period established by the Committee.

(y)“Restricted Stock Unit” means the right of a Participant to receive an amount of cash or Common Stock based on the Fair Market Value of a specified number of shares of Common Stock following a Restricted Stock Period, subject to such terms and conditions as the Committee may establish.

(z)“Retires” or “Retirement” means:

(i) with respect to Awards granted under the Plan prior to January 1, 2016, the termination of a Participant's employment with the Company or an Affiliate after attaining age 55 with at least five years of employment service; and

(ii)with respect to Awards granted under the Plan on or after January 1, 2016, the termination of a Participant's employment with the Company or an Affiliate after attaining age 55 with at least ten years of employment service.

(aa)"Stock Appreciation Right"means a Participant's right to receive an amount of cash or shares of Common Stock equal to the excess of the Fair Market Value of a specified number of shares of Common Stock on the date the right is exercised over the Fair Market Value of such number of shares of Common Stock on the Grant Date.

(bb)"Stock Award” means any award of Common Stock under the Plan and may include Restricted Stock awards or other awards of Common Stock as determined appropriate by the Committee.

3.Eligibility.

The Committee will have the exclusive power and authority (except as it may delegate such power and authority as permitted herein) to select the executives and other employees of the Company and its Affiliates who may participate in this Plan by receiving Awards made hereunder.  All nonemployee members of the 3M Board of Directors shall also be eligible to participate in and receive Awards made hereunder.

4.Shares Available for Awards.

Unless otherwise authorized by the Company’s stockholders, the total number of shares of Common Stock that may be issued or delivered pursuant to Awards granted under this Plan will be 100,000,000.  Of this total, no more than 100,000,000 may be issued or delivered upon the exercise of Incentive Stock Options.  The necessary shares shall be made available at the discretion of the Board of Directors from authorized but unissued shares, treasury shares, or shares reacquired by the Company under corporate repurchase programs. 

The following rules shall apply for the purpose of determining the number of shares of Common Stock remaining available for issuance under the Plan:

(a)If an Award is denominated in a fixed number of shares of Common Stock on the Grant Date, the number of shares covered by such Award (as in the case of an Option or Restricted Stock grant) or to which such Award relates (as in the case of a Stock Appreciation Right) will be counted on the Grant Date against the total number of shares available for issuance or delivery under the Plan.  If an Award is not denominated in a fixed number of shares of Common Stock on the Grant Date (but is potentially payable in such shares or the final number of shares is not determined until the completion of a Performance Period), only the number of shares of Common Stock actually issued or delivered as a result of such Award, if any, shall be counted against the total number of shares available for issuance or delivery under the Plan.

(b)Notwithstanding the provisions of Section 4(a) above, each Full Value Award will be counted against the total number of shares available for issuance or delivery under the Plan according to the following table:

3

 Number of Shares Counted Against

 Grant Date of  the Total Shares Available for Each

Full Value AwardShare Covered by the Full Value Award

   May 13, 2008 – May 10, 20103.38

   May 11, 2010 – May 7, 20122.87

   On or after May 8, 20123.50

(c)When an Award granted under this Plan and denominated in shares of Common Stock (or any portion thereof) expires, is cancelled, is forfeited or is otherwise terminated without the issuance of such shares, or is settled in cash or consideration other than shares of Common Stock, then the shares of Common Stock previously counted against the total number of shares available for issuance or delivery under the Plan on account of such Award (or portion thereof) will again be made available for issuance hereunder.  When an award granted under a Predecessor Plan and denominated in shares of Common Stock (or any portion thereof) expires, is cancelled, is forfeited or is otherwise terminated without the issuance of such shares, or is settled in cash or consideration other than shares of Common Stock, then the shares of Common Stock previously counted against the total number of shares available for issuance or delivery under such Predecessor Plan on account of such Award (or portion thereof) will be added to the total number of shares available for issuance or delivery under this Plan.  Notwithstanding the rest of this Section 4(c), the following shares of Common Stock will not be added to the total number of shares available or be made available again for issuance under this Plan: (i) shares not issued or delivered as a result of the net settlement of an outstanding stock option or stock appreciation right; (ii) shares delivered to or withheld by the Company to pay the exercise price of or the withholding taxes with respect to an award; and (iii) shares repurchased on the open market with the proceeds from the payment of the exercise price of an option.

(d)Any shares of Common Stock related to Awards granted through the assumption of, or in substitution for, outstanding awards previously granted by a company acquired by the Company or an Affiliate or with which the Company or any Affiliate combines, shall not be counted against the total number of shares available for issuance or delivery under the Plan.

5.Terms of Awards.

The Committee shall determine the type or types of Awards to be granted to each Participant, which shall be evidenced by such written or electronic documents as the Committee shall authorize; provided, however, that nonemployee members of the 3M Board of Directors shall not be eligible to receive Incentive Stock Options, Progressive Stock Options, Performance Units or Performance Shares.  The following types of Awards may be granted under this Plan:

(a)Incentive Stock Options – Incentive Stock Options granted hereunder shall have an exercise price equal to one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the Grant Date.  Incentive Stock Options granted hereunder shall become exercisable at such time as shall be established by the Committee and reflected in the documents evidencing such Options, and unless sooner terminated shall expire on the tenth anniversary of the Grant Date.   

(b)Nonqualified Stock Options – Nonqualified Stock Options granted hereunder shall have an exercise price equal to no less than one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the Grant Date.  Nonqualified Stock Options granted hereunder shall become exercisable and shall expire at such time or times as shall be established by the Committee and reflected in the documents evidencing such Options; provided, however, that no Nonqualified Stock Option shall expire later than ten years after the Grant Date (except that the Committee may extend the exercise period for Nonqualified Stock Options granted to Participants in any country or countries for an additional period of up to one year if and to the extent necessary to prevent adverse tax consequences to such Participants under the laws of such country).

Notwithstanding anything to the contrary in this Section, the vested and exercisable portion of an Option or Stock Appreciation Right that remains outstanding immediately prior to the expiration of its full term on or after April 1, 2016 (or, if applicable, the expiration of the limited post-termination exercise window occurring on or after April 1, 2016) shall be deemed to have been exercised by the Participant at such time if (i) the Participant has accepted the

4

Option or Stock Appreciation Right, (ii) the Fair Market Value of one share of Common Stock exceeds the applicable exercise price per share, and (iii) either (A) such Option or Stock Appreciation Right remains outstanding on the last day of its full term or (B) the Participant’s Option or Stock Appreciation Right otherwise would terminate prior to the last day of its full term as a result of the Participant’s death.  For the avoidance of doubt, an Option or Stock Appreciation Right that terminates upon the expiration of its limited post-termination exercise window shall not be deemed to have remained outstanding on the last day of its full term for purposes of clause (iii) in the preceding sentence.  In the event an Option or Stock Appreciation Right is exercised pursuant to this Section, the Company shall deliver to the Participant the number of shares of Common Stock for which the Option or Stock Appreciation Right was deemed exercised, less the number of shares of Common Stock withheld for the payment of the total purchase price and withholding taxes.

(c)Progressive Stock Options -Whenevera Participant exercises a nonqualified stock option granted under the 1997 or 2002 Management Stock Ownership Program and makes payment of all or part of the purchase price and withholding taxes, if any, in Common Stock, the Committee may in its discretion grant such Participant a Progressive Stock Option.  The number of shares subject to such Progressive Stock Option shall be equal to the number of shares of Common Stock utilized by the Participant to effect payment of the exercise price and withholding taxes, if any, for such nonqualified stock option.  Each Progressive Stock Option granted hereunder shall have an exercise price equal to one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the date of exercise of the nonqualified stock option, which shall be the Grant Date of such Progressive Stock Option.  Each Progressive Stock Option granted hereunder shall be exercisable six months after the Grant Date, and shall expire at the same time the nonqualified stock option exercised by the Participant would have expired. 

(d)Stock Appreciation Rights - The term of a Stock Appreciation Right shall be fixed by the Committee and set forth in the documents evidencing such right, but no Stock Appreciation Right shall be exercisable more than ten years after the Grant Date.  Each Stock Appreciation Right shall become exercisable at the time or times determined by the Committee and set forth in the documents evidencing such right.  Each Stock Appreciation Right granted hereunder shall have a grant price equal to one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the Grant Date.

(e)Restricted Stock - At the time a grant of Restricted Stock is made, the Committee, in its sole discretion, shall establish a Restricted Period and such additional terms and conditions as may be deemed appropriate for the incremental lapse or complete lapse of restrictions with respect to all or any portion of the shares of Common Stock represented by the Restricted Stock.  The Committee may also, in its sole discretion, shorten or terminate the Restricted Period or waive any terms or conditions for the lapse of restrictions with respect to all or any portion of the shares of Common Stock represented by the Restricted Stock.  During the Restricted Period the Participant shall generally have the rights and privileges of a stockholder as to such Restricted Stock, including the right to vote such Restricted Stock and receive dividend payments, except that the following restrictions shall apply: (i) none of the Restricted Stock may be sold, transferred, assigned, pledged, or otherwise encumbered or disposed of during the Restricted Period and until the satisfaction of any other terms and conditions prescribed by the Committee, if any; and (ii) all of the Restricted Stock shall be forfeited and all rights of the Participant shall terminate without further obligation on the part of the Company unless the Participant shall have remained a regular full-time employee of the Company or an Affiliate until the expiration or termination of the Restricted Period and the satisfaction of the other terms and conditions prescribed by the Committee, if any.  Any Restricted Stock granted under the Plan may be evidenced in such manner as the Committee may determine, in its discretion, including, without limitation, book-entry registration or issuance of one or more stock certificates bearing an appropriate legend recognizing the terms, conditions and restrictions applicable to such Restricted Stock.  Upon the forfeiture of any Restricted Stock, such shares of Common Stock represented by the Restricted Stock shall be transferred to the Company without further action by the Participant.

(f)Restricted Stock Units - At the time a grant of Restricted Stock Units is made, the Committee, in its sole discretion, shall establish a Restricted Period and such additional terms and conditions as may be deemed appropriate for the incremental lapse or complete lapse of restrictions with respect to all or any portion of such Restricted Stock Units.  The Committee may also, in its sole discretion, shorten or terminate the Restricted Period or waive any terms or conditions for the lapse of restrictions with respect to all or any portion of the Restricted Stock Units.  During the Restricted Period the Participant will not have the rights and privileges of a stockholder as to such Restricted Stock Units, including the right to vote and receive dividend payments with respect to the shares of Common Stock corresponding to such Restricted Stock Units; provided, however, that at the sole discretion of the Committee, Dividend Equivalents may be either currently paid in cash or shares or withheld by the Company for the Participant’s account and

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either maintained in cash to be paid upon the expiration of the Restricted Period or reinvested in additional Restricted Stock Units.  Each grant of Restricted Stock Units shall be subject to the following restrictions: (i) the Participant shall not be entitled to the payment of cash or the delivery of the shares of Common Stock corresponding to such Restricted Stock Units until the expiration or termination of the Restricted Period and the satisfaction of any other terms and conditions prescribed by the Committee, if any; (ii) none of the Restricted Stock Units may be sold, transferred, assigned, pledged, or otherwise encumbered or disposed of at any time; and (iii) except as otherwise provided in Section 7, all of the Restricted Stock Units and any deferred Dividend Equivalents shall be forfeited and all rights of the Participant shall terminate without further obligation on the part of the Company upon the termination of the Participant’s employment with the Company or an Affiliate prior to the end of the Restricted Period; provided, however, that if the Committee so decides and the documents evidencing an Award of Restricted Stock Units so provide, the preceding exception allowing such Restricted Stock Units to vest following the Participant’s Retirement shall not apply so that such Restricted Stock Units and any deferred Dividend Equivalents will be forfeited and all rights of the Participant shall terminate without further obligation on the part of the Company upon the Retirement of such Participant prior to the end of the Restricted Period.

(g)Other Stock Awards - The Committee may, in its sole discretion, grant Stock Awards other than Restricted Stock grants or Restricted Stock Units, and such Stock Awards may be granted singly, in combination or in tandem with, in replacement of, or as alternatives to grants or rights under this Plan or any other employee benefit or compensation plan of the Company, including the plan of any acquired entity.  If the Committee shall stipulate terms and conditions with respect to such Stock Awards, the terms and conditions will be set forth in the documents evidencing the Award.  If the terms and conditions with respect to any Stock Award shall require the surrender or forfeiture of other grants or rights under this Plan or any other employee benefit or compensation plan of the Company, then the Participant shall not have any rights under such Stock Award until the grants or rights exchanged have been fully and effectively surrendered or forfeited.

(h)Performance Units and Performance Shares – At the time it approves each grant of Performance Units or Performance Shares, the Committee shall determine the number of Performance Units or Performance Shares granted to each Participant, the proration, if any, of such Performance Units or Performance Shares if the Participant retires prior to the completion of the relevant Performance Period, the commencement and expiration of the relevant Performance Period, and the Performance Criteria by which the payment value of the Performance Units or Performance Shares will be determined.  If the Committee provides, a grant of Performance Units or Performance Shares may provide a Participant with the right to receive Dividend Equivalents, subject to the same restrictions on transferability and forfeitability and payable at the same time as the Performance Units or Performance Shares with respect to which the Dividend Equivalents are granted.  Any such Dividend Equivalents shall be converted to cash or additional shares of Common Stock, or a combination of cash and shares of Common Stock, by such formula and at such time and subject to such limitations as may be set forth in the written agreement evidencing the award.  Payment of each Performance Unit and Performance Share shall occur no later than the March 15 of the year immediately following the completion of the respective Performance Period, unless a Participant shall have made an effective election to defer the receipt of such payment pursuant to the terms of an applicable deferred compensation plan and all applicable laws.  The amount payable with respect to each Performance Unit and Performance Share shall be contingent upon the attainment of the Performance Criteria selected by the Committee during the respective Performance Period, and upon the continued employment of the Participant throughout such Performance Period (or upon the Participant’s Retirement prior to the end of such Performance Period).

6.Payment of Awards.

Payment of Awards may be in the form of cash, shares of Common Stock or combinations thereof as the Committee shall determine, and with such other restrictions as it may impose.  The Committee may permit or require the deferral of any Award payment, subject to such terms, rules and conditions as the Committee may establish, which may include provisions for the payment or crediting of interest or Dividend Equivalents; provided, however, that the Committee shall not have any authority to permit or require the deferral of any Award payment to the extent that the exercise of such authority would cause any excise tax to become due under section 409A of the Code.

No shares of Common Stock shall be issued to any Participant upon the exercise of an Option granted under this Plan until full payment of the exercise price has been made to the Company and the Participant has remitted to the Company the required withholding taxes, if any.  Payment of the exercise price and withholding taxes, if any, may be made in

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whole or in part in shares of Common Stock, pursuant to such terms and conditions as may be established from time to time by the Committee.  If payment is made in shares of Common Stock, such shares shall be valued at their Fair Market Value on the day the Participant exercises the Option or, as regards a withholding tax, on the date when the tax obligation becomes due.  A Participant need not surrender shares of already owned Common Stock as payment, and the Company may, upon the giving of satisfactory evidence of ownership of such shares by the Participant, deliver the appropriate number of additional shares of Common Stock reduced by the number of shares required to pay the exercise price and any required withholding taxes.  Such form of evidence shall be determined by the Committee in its discretion.

In no event will the Company be required to deliver any fractional share of Common Stock in connection with any Award.  In the event that a Participant shall be entitled to receive a fraction of a share of Common Stock in connection with an Award granted under the Plan, the Company shall pay in cash, in lieu thereof, the Fair Market Value of such fractional share.

7.Termination of Awards.

If a Participant’s employment with the Company or an Affiliate is terminated for any reason other than (i) a Disqualifying Termination, (ii) Retirement, (iii) a termination in connection with which the Participant executes a written release of employment-related claims in favor of the Company that provides (with the approval of the Company) for the nonforfeiture of Options and Stock Appreciation Rights, (iv) a physical or mental disability as recognized under a benefit plan maintained by the Participant’s employer, or (v) death, and prior to the date of termination the Participant has not fully exercised an Option or Stock Appreciation Right granted under this Plan, such Participant may exercise the Option or Stock Appreciation Right within ninety (90) days following the date of termination (but not beyond the expiration date of such Option or Right) for the number of shares which the Participant could have purchased or received a payment on the date of termination.  Unless the documents evidencing such Awards or the terms of this Section 7 provide otherwise, all of the Participant’s Options and Stock Appreciation Rights shall automatically be forfeited at the conclusion of the ninety (90)-day period following the date of the Participant’s termination of employment and all of the Participant’s other Awards shall automatically be forfeited at the time of his or her termination of employment.

If a Participant Retires, terminates employment with the Company or an Affiliate and in connection with such termination the Participant executes a written release of employment-related claims in favor of the Company that provides (with the approval of the Company) for the nonforfeiture of Options and Stock Appreciation Rights, or changes employment status as a result of a physical or mental disability as recognized under a benefit plan maintained by the Participant’s employer, without having fully exercised an Option or Stock Appreciation Right, the Participant shall be entitled, within the remaining term of the Option or Stock Appreciation Right (but not beyond the expiration date of such Option or Right), to exercise such Option or Stock Appreciation Right (provided, however, that in the event of a termination in connection with which the Participant executes a written release of employment-related claims in favor of the Company that provides (with the approval of the Company) for the nonforfeiture of Options and Stock Appreciation Rights, the additional time to exercise Options and Stock Appreciation Rights shall apply only to those Options and Stock Appreciation Rights which have vested prior to the date of termination of employment).  If a Participant who has thus Retired dies, without having fully exercised an Option or Stock Appreciation Right, the Option or Stock Appreciation Right (including any portion thereof not already exercisable at the time of the Participant’s death) may be exercised within two years after the date of his or her death (but not beyond the expiration date of such Option or Right) by the Participant's estate or by a person who acquired the right to exercise such Option or Stock Appreciation Right by bequest or inheritance or by reason of the death of the Participant.

If a Participant, prior to Retirement, dies without having fully exercised an Option or Stock Appreciation Right, the Option or Stock Appreciation Right (including any portion thereof not already exercisable at the time of the Participant’s death) may be exercised within two years following his or her death (but not beyond the expiration date of such Option or Right) by the Participant's estate or by a person who acquired the right to exercise such Option or Stock Appreciation Right by bequest or inheritance or by reason of the death of the Participant.

Notwithstanding the rest of this Section 7, if a Participant’s employment with the Company or an Affiliate is terminated before he or she has fully exercised an Option or Stock Appreciation Right under circumstances which the Committee believes to warrant special consideration and the Committee has determined that the Participant's rights should not be forfeited at the time or times specified above, the Option or Stock Appreciation Right (including any portion thereof not

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already exercisable at the time of termination) may be exercised within two years following his or her termination of employment (but not beyond the expiration date of such Option or Right).

If a Participant’s employment is terminated by the Company or an Affiliate by reason of a restructuring, divestiture, job elimination or any other similar event, as determined by the Company in its sole discretion, and in connection with such termination the Participant executes and does not revoke a written release of employment-related claims in favor of the Company that provides (with the approval of the Company) for pro rata vesting of the Participant’s annual Restricted Stock Unit Awards in accordance with the terms of this Section 7, then the Participant shall vest in a portion of his or her then unvested annual Restricted Stock Unit Awards at the time the release becomes effective and irrevocable.  The number of Restricted Stock Units (if any) subject to the portion of each unvested annual Restricted Stock Unit Award that vests in accordance with the preceding sentence shall equal the number of additional Restricted Stock Units (if any) in which the Participant otherwise would have been vested at the time of his or her termination of employment if the Restricted Stock Units subject to each vesting tranche of such Award vested in a series of successive equal annual installments over the duration of the service-based vesting schedule otherwise applicable to such vesting tranche.  The Shares underlying the Restricted Stock Units that vest pursuant to this paragraph shall be issued as soon as administratively practicable following the date on which the Participant’s release becomes effective and irrevocable (but in any event no later than March 15 of the calendar year following the calendar year in which the Participant’s termination of employment occurs) or, to the extent necessary to comply with the requirements of section 409A of the Code, in accordance with the provisions of the documents evidencing the Participant’s Award.

If a Participant dies, either prior to or following Retirement, or becomes “disabled” within the meaning of section 409A(a)(2)(C) of the Code, and has not yet received the stock certificate for the shares of Common Stock represented by a grant of Restricted Stock, Restricted Stock Units or other Stock Award, then all restrictions imposed during the Restricted Period and any other terms and conditions prescribed by the Committee, if any, shall automatically lapse and a stock certificate shall be delivered to the Participant or the Participant's beneficiary, representative, or estate, as the case may be upon the Participant’s demonstration to the satisfaction of the Committee that such Participant is considered “disabled” for purposes of section 409A(a)(2)(C) of the Code.

If a Participant Retires or changes employment status as a result of a physical or mental disability as recognized under a benefit plan maintained by the Participant’s employer prior to the payment date for an Award of Performance Shares or Performance Units, such Retirement or change in status shall not affect any rights of the Participant with respect to such Performance Shares or Performance Units; provided, however, that the Committee may provide for the proration of the Performance Shares or Performance Units granted to a Participant who Retires prior to the completion of the Performance Period for such Performance Shares or Performance Units.

If a Participant dies without having received payment of any Performance Shares or Performance Units granted under this Plan, payment of such Shares or Units shall be made no later than March 15 of the year following the year in which the Participant died to such Participant’s surviving beneficiary or beneficiaries or, if there shall be no such surviving beneficiaries, to such Participant’s estate in the following manner:

(i)  If the Participant dies after the expiration of a Performance Period for such Performance Shares or Performance Units, the payment shall be at the same rate as that paid to other Participants who survive until the payment date; and

(ii)  If the Participant dies before the expiration of a Performance Period for such Performance Shares or Performance Units, the amount of payment shall be at the lesser of:

●the face or target value of each outstanding Performance Share or Performance Unit for which payment has not been made; or

●any other amount approved, in its discretion, by the Committee.

If a Participant’s employment with the Company or an Affiliate is terminated due to a Disqualifying Termination, participation hereunder shall cease and all of the Participant’s Awards granted under this Plan shall be automatically forfeited, notwithstanding any language to the contrary in this Plan document.

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If a Participant breaches the provisions of such Participant’s agreement with the Company or an Affiliate pertaining to nondisclosure of confidential information, assignment of rights to inventions, competition with the Company or post-employment solicitation of the Company’s employees or customers, and such agreement provides for the forfeiture of Awards granted under this Plan in the event of such breach, all of the Participant’s Awards granted under this Plan since the date that such Participant signed such agreement shall be automatically forfeited, notwithstanding any language to the contrary in this Plan document.

Participation hereunder shall cease and all rights under the Plan with respect to Restricted Stock or other Stock Awards granted to a Participant who has been participating in this Plan as a nonemployee member of the 3M Board of Directors are automatically forfeited by the Participant upon the date of termination of his or her membership on the 3M Board of Directors for any reason other than: (i) retirement, (ii) physical or mental disability as determined by the Committee, or (iii) death. 

8.Limits on Awards. 

No Participant shall be granted Options and Stock Appreciation Rights under this Plan with respect to more than 1,000,000 shares of Common Stock in any calendar year.  No Participant shall receive cash, vested shares of Common Stock or other property as a result of Awards granted under this Plan, other than Options and Stock Appreciation Rights, having a value exceeding $30,000,000 in any calendar year.  No Participant who is a nonemployee member of 3M’s Board of Directors may be granted Awards under this Plan having a value (determined as of the Grant Date of each Award) exceeding $500,000 in any calendar year.

9.Plan Administration.

This Plan will be administered by the Committee, which shall have full power and authority to select the Participants, interpret the Plan, continue, accelerate or suspend the exercisability or vesting of an Award, and adopt such rules and procedures for operating the Plan as it may deem necessary or appropriate.  Its power and authority shall include, but not be limited to, making any amendments to or modifications of the Plan which may be required or necessary to make such Plan comply with the provisions of any laws or regulations of any country or unit thereof in which the Company or any Affiliate operates.  To do so, the Committee may establish different terms and conditions for Awards made to Participants who live in or are subject to taxation in one or more countries other than the United States in order to accommodate the tax or other relevant laws of such countries.  The Committee may adopt one or more supplements or sub-plans under the Plan to implement these different terms and conditions.  Except for adjustments made in accordance with Section 11, no Option or Stock Appreciation Right granted under this Plan may be repriced to reduce the exercise or grant price of any outstanding Option or Stock Appreciation Right, nor may an outstanding Option or Stock Appreciation Right granted under this Plan be cancelled in exchange for cash, another Award, or an Option or Stock Appreciation Right with an exercise or grant price that is less than the exercise or grant price of the cancelled Option or Stock Appreciation Right, without the prior approval of the Company’s stockholders.

10.Delegation of Authority.

To the extent permitted by Delaware law, the Committee may delegate to officers of the Company any or all of its duties, power and authority under this Plan subject to such conditions or limitations as the Committee may establish; provided, however, that no officer shall have or obtain the authority to grant Awards to (i) himself or herself, (ii) nonemployee members of the 3M Board of Directors, or (iii) any person subject to section 16 of the Securities Exchange Act of 1934.

11.Adjustments.

In the event of any change in the outstanding Common Stock of the Company by reason of a stock split, stock dividend, combination or reclassification of shares, recapitalization, merger or similar event, the Committee shall adjust proportionately: (a) the number of shares of Common Stock (i) available for issuance or delivery under this Plan in accordance with Section 4, (ii) for which Awards may be granted to a single Participant in accordance with Section 8, and (iii) subject to outstanding Awards granted under this Plan; (b) the exercise prices of outstanding Awards; and (c) the appropriate Fair Market Value and other price determinations for such Awards.  In the event of any other change affecting the Common Stock or any distribution (other than normal cash dividends) to holders of Common Stock, such

9

adjustments in the number or kind of shares and the exercise prices, Fair Market Value and other price determinations of the affected Awards as the Committee shall, in its sole discretion, determine are equitable, shall be made and shall be effective and binding for all purposes of such outstanding Awards.  In the event of a corporate merger, consolidation, acquisition of assets or stock, separation, reorganization or liquidation, the Committee shall be authorized to cause the Company to assume outstanding employee awards or issue replacement Awards to affected employees, whether or not in a transaction to which section 424(a) of the Code applies, and to make such adjustments in the terms of such awards as it shall deem appropriate in order to maintain reasonable comparability or equitable treatment between the assumed awards and the Awards granted under this Plan as so adjusted. 

12.Withholding.

Prior to the payment or settlement of any Award, the Participant must pay, or make arrangements satisfactory to the Company for the payment of, any and all tax withholding that in the opinion of the Company is required by law.  The Company or any Affiliate shall have the right to deduct applicable taxes from any Award payment, to withhold from the shares of Common Stock being issued or delivered in connection with an Award an appropriate number of shares for the payment of taxes required by law, or to take such other action as may be necessary in the opinion of the Company or such Affiliate to satisfy all obligations for the withholding of such taxes.

13.Transferability.

Except as permitted in this Section 13, no Award granted under this Plan may be assigned, transferred (other than a transfer by will or the laws of descent and distribution as provided in Section 7), pledged, or hypothecated (whether by operation of law or otherwise).  Awards granted under this Plan shall not be subject to execution, attachment, or similar process.  The Committee may, in its sole discretion, permit individual Participants to transfer the ownership of all or any of their Nonqualified Options granted under this Plan to (i) the spouse, former spouse, children or grandchildren of such Participant (“Immediate Family Members”), (ii) a trust or trusts for the exclusive benefit of such Immediate Family Members, or (iii) a partnership in which such Immediate Family Members are the only partners, provided that (x) there may be no consideration for any such transfer, and (y) subsequent transfers of transferred Nonqualified Options shall be prohibited except those in accordance with Section 7 (by will or the laws of descent and distribution).  The Committee may, in its sole discretion, create further conditions and requirements for the transfer of Nonqualified Options.  Following transfer, any such Nonqualified Options shall continue to be subject to the same terms and conditions as were applicable immediately prior to transfer.  The events causing termination of Awards in accordance with Section 7 hereof shall continue to be applied with respect to the original Participant, following which the Nonqualified Options shall be exercisable by the transferee only to the extent, and for the periods specified in Section 7.

14.Validity.

In the event any provision of this Plan should be determined to be illegal or invalid for any reason, it shall not affect the remaining provisions of the Plan which shall remain in effect as if the illegal or invalid provision had never been included herein.

15.Governing Law.

The provisions of this Plan shall be governed by, and interpreted and construed in accordance with, the laws of the State of Delaware.

16.Effective Date, Term, Amendment and Termination of the Plan.

This Plan will become effective on the date it is approved by the requisite vote of the stockholders of 3M Company, and shall expire (unless it is terminated before then) on the tenth anniversary of such effective date.  Such expiration shall not adversely affect Awards granted under this Plan prior to such expiration date.  The Committee may at any time amend or terminate this Plan, except that no amendment or termination shall adversely affect Awards granted under this Plan prior to the effective date of such amendment or termination; provided, however, that no amendment shall be made without the prior approval of the Board of Directors and the holders of a majority of the issued and outstanding shares of Common Stock represented and entitled to vote on such amendment which would (i) increase the aggregate number of shares of Common Stock available for issuance or delivery under this Plan in accordance with Section 4 (except for

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adjustments made in accordance with Section 11), (ii) permit the granting of Awards with purchase prices lower than those specified in Section 5, or (iii) be a material amendment for which stockholder approval is required by applicable law, regulation or stock exchange rule.

17.Change in Control.

For purposes of this Section 17, the following words and phrases shall have the meanings indicated below, unless the context clearly indicates otherwise:

(a)"Person" shall have the meaning associated with that term as it is used in Sections 13(d) and 14(d) of the Act.

(b)"Affiliates and Associates" shall have the meanings assigned to such terms in Rule 12b-2 promulgated under Section 12 of the Act.

(c)"Act" means the Securities Exchange Act of 1934.

(d)"Continuing Directors" shall have the meaning assigned to such term in Article Thirteenth of the Restated Certificate of Incorporation of 3M Company.

(e)“Cause” means (i) a material violation of any policy of the Company or the Affiliate employing the Participant, including, without limitation, any of the Company’s Business Conduct Policies, or (ii) embezzlement from or theft of property belonging to the Company or the Affiliate employing the Participant.

(f)“Good Reason” means (i) a material diminution in the Participant’s position, authority, duties or responsibilities as in effect immediately prior to the Change in Control, (ii) a material diminution in the Participant’s base salary or annual planned cash compensation, or (iii) a material change in the geographic location at which the Participant is required to perform services for the Company or the Affiliate employing such Participant.

Notwithstanding any other provision of this Plan to the contrary, all outstanding Options and Stock Appreciation Rights with a Grant Date prior to February 9, 2010 shall (i) become immediately exercisable in full for the remainder of their respective terms upon the occurrence of a Change in Control of the Company, and (ii) remain exercisable in full for a minimum period of six months following the Change in Control; provided, however, that in no event shall any Option or Stock Appreciation Right be exercisable beyond the original expiration date.  Similarly, all restrictions regarding the Restricted Period or the satisfaction of other terms and conditions prescribed by the Committee, if any, with respect to grants of Restricted Stock, Restricted Stock Units or other Stock Awards with a Grant Date prior to February 9, 2010, shall automatically lapse, expire, and terminate and the Participant shall be immediately entitled to receive a stock certificate for the number of shares of Common Stock represented by the Restricted Stock, Restricted Stock Units or Stock Awards upon the occurrence of a Change in Control.

Notwithstanding any other provision of this Plan to the contrary, if a Participant’s employment with the Company or an Affiliate is terminated without Cause or if the Participant resigns for a Good Reason within eighteen months following a Change in Control of the Company, then all of such Participant’s outstanding Options and Stock Appreciation Rights with a Grant Date of February 9, 2010 or later shall become immediately exercisable in full for the remainder of their respective terms and shall remain exercisable in full for a minimum of six months following the date of such termination or resignation; provided, however, that in no event shall any Option or Stock Appreciation Right be exercisable beyond the original expiration date.  Similarly, all restrictions regarding the Restricted Period or the satisfaction of other terms and conditions prescribed by the Committee, if any, with respect to grants of Restricted Stock, Restricted Stock Units or other Stock Awards with a Grant Date of February 9, 2010 or later, shall automatically lapse, expire and terminate and the Participant shall be immediately entitled to receive a stock certificate for the number of shares of Common Stock represented by the Restricted Stock, Restricted Stock Units or Stock Awards upon the termination without Cause of the Participant’s employment with the Company or an Affiliate or the Participant’s resignation for Good Reason within eighteen months following a Change in Control of the Company.

Notwithstanding any other provision of this Plan to the contrary, all outstanding Options and Stock Appreciation Rights shall become immediately exercisable in full and remain exercisable in full for a minimum period of six months

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following a Change in Control in which the individuals or entities acquiring control of the Company do not assume or otherwise provide for the continuation of such Options and Rights for at least such six-month period; provided, however, that in no event shall any Option or Stock Appreciation Right be exercisable beyond the original expiration date.  Similarly, all restrictions regarding the Restricted Period or the satisfaction of other terms and conditions prescribed by the Committee, if any, with respect to grants of Restricted Stock, Restricted Stock Units or other Stock Awards shall automatically lapse, expire, and terminate and the Participant shall be immediately entitled to receive a stock certificate for the number of shares of Common Stock represented by the Restricted Stock, Restricted Stock Units or Stock Awards upon the occurrence of a Change in Control in which the individuals or entities acquiring control of the Company do not assume or otherwise provide for the continuation of such Restricted Stock, Restricted Stock Units and other Stock Awards.

Notwithstanding any other provision of this Plan to the contrary, upon the occurrence of a Change in Control of the Company each Performance Period shall end and the Company shall immediately distribute in cash or shares of Common Stock, as appropriate, to the respective Participants the value of all outstanding Performance Shares and Performance Units granted under this Plan with a Grant Date prior to February 9, 2010, as determined in accordance with the following rules:

(w)  With respect to those Performance Shares or Performance Units for which the Performance Period had not been completed prior to the Change in Control of the Company, the value of such Shares or Units for purposes of this Section 17 shall be equal to the product of a fraction, where the numerator of such fraction is the number of full calendar months completed during the respective Performance Period and prior to the Change in Control and the denominator of such fraction is the total number of months in such Performance Period, multiplied by the largest of:

●the value of such Performance Shares or Performance Units computed as if the Company’s performance during the remainder of the Performance Period following the Change in Control equaled its performance during those full calendar quarters completed during the respective Performance Period and prior to the date of the Change in Control;

●the value of such Performance Shares or Performance Units computed as if the Performance Period for such Shares or Units was the three consecutive calendar year period ending immediately prior to the year in which the Change in Control occurs; or

●any other amount approved, in its discretion, by the Committee.

(x)  With respect to those Performance Shares or Performance Units for which the Performance Period has been completed at the time of a Change in Control of the Company, the value of such Shares or Units for purposes of this Section 17 shall be the actual value as adjusted to reflect the actual Company performance during the Performance Period.

Notwithstanding any other provision of this Plan to the contrary, if a Participant’s employment with the Company or an Affiliate is terminated without Cause or if the Participant resigns for a Good Reason within eighteen months following a Change in Control of the Company, then with respect to such Participant each Performance Period shall end and the Company shall immediately distribute in cash or shares of Common Stock, as appropriate, to such Participant the value of all outstanding Performance Shares and Performance Units granted under this Plan with a Grant Date of February 9, 2010 or later, as determined in accordance with the following rules:

(y)  With respect to those Performance Shares or Performance Units for which the Performance Period had not been completed prior to the Participant’s termination or resignation, the value of such Shares or Units for purposes of this Section 17 shall be equal to the product of a fraction, where the numerator of such fraction is the number of full calendar months completed during the respective Performance Period and prior to the termination or resignation and the denominator of such fraction is the total number of months in such Performance Period, multiplied by the largest of:

●the value of such Performance Shares or Performance Units computed as if the Company’s performance during the remainder of the Performance Period following the termination or

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resignation equaled its performance during those full calendar quarters completed during the respective Performance Period and prior to the date of the termination or resignation;

●the value of such Performance Shares or Performance Units computed as if the Performance Period for such Shares or Units was the three consecutive calendar year period ending immediately prior to the year in which the termination or resignation occurs; or

●any other amount approved, in its discretion, by the Committee.

(z)  With respect to those Performance Shares or Performance Units for which the Performance Period has been completed by the time of the Participant’s termination or resignation, the value of such Shares or Units for purposes of this Section 17 shall be the actual value as adjusted to reflect the actual Company performance during the Performance Period.

For purposes of this Section 17, a Change in Control of the Company shall be deemed to have occurred only if a “change in the ownership” or a “change in effective control” and/or a “change in the ownership of a substantial portion of the assets” of the Company has taken place (as those terms are defined in Treasury Regulations §1.409A-3(i)(5) or such other regulation or guidance issued under section 409A of the Code.

The Company shall pay to each Participant the amount of all reasonable legal and accounting fees and expenses incurred by such Participant in seeking to obtain or enforce his or her rights under this Section 17, or in connection with any income tax audit or proceeding to the extent attributable to the application of section 4999 of the Code to the payments made pursuant to this Section 17, unless a lawsuit commenced by the Participant for such purposes is dismissed by the court as being frivolous or otherwise improper under applicable court rules.  The Company shall also pay to each Participant the amount of all reasonable tax and financial planning fees and expenses incurred by such Participant in connection with such Participant's receipt of payments pursuant to this Section 17.  Payment of these legal and accounting fees and expenses, as well as these tax and financial planning fees and expenses, shall be made as soon as administratively feasible, but no later than two and one-half months following the end of the Participant’s taxable year in which these fees and expenses have been incurred.

18.Miscellaneous.

(a)Nothing in this Plan or the fact that a person has received or become eligible to receive Awards hereunder shall be deemed to give such person any right to be retained in the employ of the Company or any Affiliate or to interfere with the right of the Company or any Affiliate to discipline or terminate the employment of such person at any time for any reason whatsoever.  No person shall have any claim or right to receive Awards under this Plan, except as provided in accordance with the provisions of this Plan and as approved by the Committee.  Unless otherwise specifically determined by the Committee, neither the Awards themselves nor the payments received with respect to such Awards granted under this Plan will be deemed a part of any Participant’s compensation for purposes of determining such Participant’s payments or benefits under any benefit plan or severance program of the Company or any Affiliate or under the severance pay law of any country.

(b)This Plan will be unfunded.  The Company does not intend to create any trust or separate fund in connection with the Plan.  The Company shall not have any obligation to set aside funds or segregate assets to ensure the payment of any Award.  The Plan shall not establish any fiduciary relationship between the Company and any Participant or other person.  To the extent any person holds any rights by virtue of an Award under this Plan, such right (unless otherwise determined by the Committee) shall be no greater than the right of an unsecured general creditor of the Company.

(c) Prior to the payment or settlement of any Award, the Participant must pay or make arrangements satisfactory to the Company and its Affiliates for the payment of any and all tax withholding that in the opinion of the Company and its Affiliates is required by law.  The Company and its Affiliates shall have the right to deduct from any Award or any payment due on account of any Award granted under this Plan the federal, state, local or foreign income or other taxes required by law to be withheld with respect to such Award or payment, to withhold from the shares of Common Stock being issued or delivered in connection with an Award an appropriate number of shares for the payment

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of taxes required by law, and to take such other action as may be necessary in the opinion of the Company and its Affiliates to satisfy all obligations for the withholding and payment of such taxes.

(d) The provisions of this Plan and the documents evidencing Awards granted under this Plan shall be construed and interpreted according to the laws of the State of Delaware.

(e)In case any provision of this Plan shall be ruled or declared invalid for any reason, said illegality or invalidity shall not affect the remaining provisions, and the remainder of the Plan shall be construed and enforced as if such illegal or invalid provision had never been included herein.

(f)To the extent permitted by the Committee, each Participant shall have the right at any time to designate any person, persons or entity as the beneficiary or beneficiaries to whom payment of the Participant’s outstanding Awards shall be made in the event of the Participant’s death.  Any designation filed under the Plan may be revoked or changed by written instrument so signed and filed prior to the Participant’s death.  If a Participant designates more than one beneficiary to receive such Participant’s outstanding Awards and any beneficiary shall predecease the Participant, the Company shall pay the deceased beneficiary’s share to the surviving beneficiary or beneficiaries proportionately, as the portion designated by the Participant for each bears to the total portion designated for all surviving beneficiaries.

(g)This Plan is intended to comply and shall be administered in a manner that is intended to comply with the requirements of Section 409A of the Code (including the Treasury Department guidance and regulations issued thereunder), and shall be construed and interpreted in accordance with such intent.  If the Committee determines that an Award, Award document, payment, transaction or any other action or arrangement contemplated by the provisions of this Plan would, if undertaken, cause a Participant to become subject to any additional taxes or other penalties under Section 409A of the Code, then unless the Committee specifically provides otherwise, such Award, Award document, payment, transaction or other action or arrangement shall not be given effect to the extent it causes such result and the related provisions of the Plan and/or Award documents will be deemed modified or, if necessary, suspended in order to comply with the requirements of Section 409A of the Code to the extent determined appropriate by the Committee, in each case without the consent of or notice to the Participant.

(h)Although the Company and its Affiliates may endeavor to structure an Award or payment hereunder so that it (i) qualifies for favorable U.S. or foreign tax treatment, or (ii) avoids adverse tax treatment, neither the Company nor any Affiliate makes any representation to that effect and expressly disavows any commitment or obligation to maintain favorable or avoid unfavorable tax treatment for any Participant.

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EX-10.8

EXHIBIT 10.8

(Including amendments

through February 2, 2016)

3M 2005 MANAGEMENT STOCK OWNERSHIP PROGRAM

SECTION 1  PURPOSE

The purpose of this plan is to help the Company attract and retain outstanding employees, and to promote the growth and success of the Company’s business by aligning the financial interests of these employees with the other stockholders of the Company.  It has been the policy of the Company to encourage employee participation as stockholders and the Company believes that employee stock ownership has been an important factor contributing to the Company's growth and progress.

SECTION 2  DEFINITIONS

(a)“Award” shall mean an Incentive Stock Option, Nonqualified Stock Option, Progressive Stock Option, Stock Appreciation Right, Restricted Stock, Restricted Stock Unit or other Stock Award granted to a Participant pursuant to this 2005 Program, subject to the terms, conditions and restrictions of this 2005 Program and to such other terms, conditions and restrictions as may be established by the Committee.

(b)"Board of Directors" shall mean the Board of Directors of 3M Company.

(c)“Code” shall mean the Internal Revenue Code of 1986, as it may be amended from time to time.  For purposes of this 2005 Program, references to sections of the Code shall be deemed to include references to any applicable regulations thereunder and any successor or similar provisions.

(d)"Committee" shall mean the Compensation Committee established by the Board of Directors acting without the participation of any member who may have received a grant or award under the 2005 Program or any other similar plan or program of the Company (except those limited to participation by directors) during the previous one year period, or such other committee of disinterested administrators established by the Board of Directors to comply with Rule 16b-3 promulgated by the Securities and Exchange Commission, as amended from time to time.

(e)"Common Stock" shall mean the common stock, with a par value of $0.01 per share, of 3M Company.

(f)"Company" shall mean 3M Company and such subsidiaries or affiliates as may be designated by the Board of Directors from time to time.

(g)"Conditions" shall mean the condition that the Restricted Period stipulated by the Committee at the time of grants of Restricted Stock or Restricted Stock Units shall have expired or terminated and that any other conditions prescribed by the Committee regarding a Participant's continued employment by the Company or the Company's performance during the Restricted Period shall have been satisfied, or any other conditions stipulated by the Committee with respect to Stock Awards.

(h)“Disqualifying Termination” shall mean a termination of a Participant’s employment with the Company (i) due to a material violation of any Company policy, including, without limitation, any policy contained in the Company’s Business Conduct Manual, or (ii) due to embezzlement from or theft of property belonging to the Company.

(i)"Dividend Equivalents" shall mean that sum of cash or Common Stock of equivalent value equal to the amount of cash or stock dividends paid upon Common Stock subject to any Awards under the 2005 Program, prior to such time as the Participant otherwise becomes entitled thereto as a holder of record.

(j)"Fair Market Value" shall mean the closing price for a share of Common Stock as reported on the New York Stock Exchange Composite Transactions.

(k)“Grant Date” shall mean the effective date of an Award granted to a Participant under the 2005 Program.

(l)'Incentive Stock Option" shall mean an Option granted to a Participant under the 2005 Program which satisfies the requirements of section 422 of the Code and is so designated in the written or electronic documents evidencing such Option.

(m)“MSOP Administrator” shall mean the entity retained by the Company to administer the 2005 Program.

(n)"Nonqualified Stock Option" shall mean an Option granted to a Participant under the 2005 Program which is not an Incentive Stock Option.

(o)"Option" shall mean a Participant's right to purchase the number of shares of Common Stock approved by the Company, subject to the terms and conditions of the 2005 Program, and the term shall include both Incentive Stock Options and Nonqualified Options.

(p)"Participant" shall mean any employee of the Company who is designated as a Participant by the Committee.

(q)"2002 Program" shall mean the Company's 2002 Management Stock Ownership Program.

(r)“2005 Program” shall mean the Company’s 2005 Management Stock Ownership Program.

(s)“Progressive Stock Option” shall mean an Option granted to a Participant under the 2005 Program upon the exercise of a Nonqualified Stock Option granted under the 2002 Program or its predecessors where such Participant makes payment for all or part of the purchase price and withholding taxes in shares of Common Stock.

(t)"Restricted Period" shall mean that period of time determined by the Committee during which a Participant shall not be permitted to sell or transfer shares of Restricted Stock granted under the 2005 Program, or prior to the time when a Participant’s interest in Restricted Stock Units granted under this 2005 Program shall have vested.

(u)"Restricted Stock" shall mean that Common Stock granted to a Participant subject to the Conditions established by the Committee.

(v)“Restricted Stock Unit” shall mean a stock unit granted to a Participant with a value equal to the value of a share of Common Stock, subject to the Conditions established by the Committee.

(w)“Retires” or "Retirement" shall mean the termination of a Participant’s employment with the Company (i) after attaining age 55 with at least five years of employment service or after attaining age 65, or (ii) if the Participant is covered by a retirement plan of the Company which enables such Participant to retire before attaining age 55 with at least five years of employment service or age 65, after meeting the requirements for retirement under a retirement plan of the Company.

(x)"Stock Appreciation Right" shall mean a Participant's right to receive an amount of cash or shares of Common Stock equal to the excess of the Fair Market Value of a specified number of shares of Common Stock on the date the right is exercised over the Fair Market Value of such number of shares of Common Stock on the Grant Date.

(y)"Stock Award" shall mean any award of Common Stock under the Program and may include Restricted Stock awards or other awards of Common Stock as determined appropriate by the Committee.

SECTION 3 SHARES AVAILABLE FOR AWARDS

The number of shares of Common Stock that may be issued or delivered as a result of Options, Restricted Stock, Restricted Stock Units or other Stock Awards granted during the term of the 2005 Program, or made subject to Stock Appreciation Rights granted during the term of the 2005 Program, is 36,750,000.  Of this total, no more than 36,750,000 shares may be granted as Incentive Stock Options.  Any shares issued or delivered as a result of Awards granted during

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the term of this 2005 Program other than Options or Stock Appreciation Rights settled exclusively in Common Stock shall be counted against the 36,750,000 share limit described above as 2.45 shares for every one share issued in connection with such Award or by which the Award is valued by reference.  Any shares of Common Stock made subject to Stock Appreciation Rights granted during the term of this 2005 Program and settled exclusively in Common Stock shall be counted in full against the 36,750,000 share limit regardless of the number of shares of Common Stock actually issued upon the exercise of such Stock Appreciation Rights.  The necessary shares shall be made available at the discretion of the Board of Directors from authorized but unissued shares, treasury shares, or shares reacquired by the Company under corporate repurchase programs.  The payment of stock dividends and dividend equivalents settled in Common Stock inconjunction with outstanding Awards shall not be counted against the shares available for issuance.

SECTION 4  ADMINISTRATION

The 2005 Program shall be administered by the Committee, which shall have full power and authority to select the Participants, interpret the Program, continue, accelerate or suspend the exercisability or vesting of an Award, and adopt such rules and procedures for operating the Program as it may deem necessary or appropriate.  Its power and authority shall include, but not be limited to, making any amendments to or modifications of the 2005 Program which may be required or necessary to make such Program comply with the provisions of any laws or regulations of any country or unit thereof in which the Company operates.  To do so, the Committee may establish different terms and conditions for Awards made to Participants who live in or are subject to taxation in one or more countries other than the United States in order to accommodate the tax or other relevant laws of such countries.  The Committee may adopt one or more supplements or sub-plans under the Program to implement these different terms and conditions.

SECTION 5  DELEGATION OF AUTHORITY

To the extent permitted by Delaware law, the Committee may delegate to officers of the Company any or all of its duties, power and authority under the 2005 Program subject to such conditions or limitations as the Committee may establish; provided, however, that no officer shall have or obtain the authority to grant Awards to (i) himself or herself, or (ii) any person subject to section 16 of the Securities Exchange Act of 1934.

SECTION 6  TERMS OF AWARDS

The Committee shall determine the type or types of Awards to be granted to each Participant, which shall be evidenced by such written or electronic documents as the Committee shall authorize.  No Participant shall be granted Awards under the 2005 Program with respect to more than 3,000,000 shares of Common Stock.  The following types of Awards may be granted under this 2005 Program:

(a)Incentive Stock Options – Incentive Stock Options granted hereunder shall have a purchase price equal to one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the Grant Date.  Incentive Stock Options granted hereunder shall become exercisable at such time as shall be established by the Committee and reflected in the documents evidencing such Options, and unless sooner terminated shall expire on the tenth anniversary of the Grant Date.   

(b)Nonqualified Stock Options – Nonqualified Stock Options granted hereunder shall have a purchase price equal to no less than one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the Grant Date.  Nonqualified Stock Options granted hereunder shall become exercisable and shall expire at such time or times as shall be established by the Committee and reflected in the documents evidencing such Options; provided, however, that no Nonqualified Stock Option shall expire later than ten years after the Grant Date (except that the Committee may extend the exercise period for Nonqualified Stock Options granted to Participants in any country or countries for an additional period of up to one year if and to the extent necessary to prevent adverse tax consequences to such Participants under the laws of such country).

Notwithstanding anything to the contrary in this Section, the vested and exercisable portion of an Option or Stock Appreciation Right that remains outstanding immediately prior to the expiration of its full term on or after April 1, 2016 (or, if applicable, the expiration of the limited post-termination exercise window occurring on or after April 1, 2016) shall be deemed to have been exercised by the Participant at such time if (i) the Participant has accepted the Option or Stock

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Appreciation Right, (ii) the Fair Market Value of one share of Common Stock exceeds the applicable exercise price per share, and (iii) either (A) such Option or Stock Appreciation Right remains outstanding on the last day of its full term or (B) the Participant’s Option or Stock Appreciation Right otherwise would terminate prior to the last day of its full term as a result of the Participant’s death.  For the avoidance of doubt, an Option or Stock Appreciation Right that terminates upon the expiration of its limited post-termination exercise window shall not be deemed to have remained outstanding on the last day of its full term for purposes of clause (iii) in the preceding sentence.  In the event an Option or Stock Appreciation Right is exercised pursuant to this Section, the Company shall deliver to the Participant the number of shares of Common Stock for which the Option or Stock Appreciation Right was deemed exercised, less the number of shares of Common Stock withheld for the payment of the total purchase price and withholding taxes.

(c)Progressive Stock Options -Whenevera Participant exercises a Nonqualified Stock Option granted under the 2002 Program or its predecessors and makes payment of all or part of the purchase price and withholding taxes, if any, in Common Stock, the Committee may in its discretion grant such Participant a Progressive Stock Option.  The number of shares subject to such Progressive Stock Option shall be equal to the number of shares of Common Stock utilized by the Participant to effect payment of the purchase price and withholding taxes, if any, for such Nonqualified Stock Option.  Each Progressive Stock Option granted hereunder shall have a purchase price equal to one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the date of exercise of the Nonqualified Stock Option, which shall be the Grant Date of such Progressive Stock Option.  Each Progressive Stock Option granted hereunder shall be exercisable six months after the Grant Date, and shall expire at the same time the Nonqualified Option exercised by the Participant would have expired. 

(d)Stock Appreciation Rights - The term of a Stock Appreciation Right shall be fixed by the Committee and set forth in the documents evidencing such right, but no Stock Appreciation Right shall be exercisable more than ten years after the Grant Date.  Each Stock Appreciation Right shall become exercisable at the time or times determined by the Committee and set forth in the documents evidencing such right.  Each Stock Appreciation Right granted hereunder shall have a grant price equal to one hundred percent (100%) of the Fair Market Value of a share of Common Stock on the Grant Date.

(e)Restricted Stock - At the time a grant of Restricted Stock is made, the Committee, in its sole discretion, shall establish a Restricted Period and such additional Conditions as may be deemed appropriate for the incremental lapse or complete lapse of restrictions with respect to all or any portion of the shares of Common Stock represented by the Restricted Stock.  The Committee may also, in its sole discretion, shorten or terminate the Restricted Period or waive any Conditions with respect to all or any portion of the shares of Common Stock represented by the Restricted Stock.  The Participant shall generally have the rights and privileges of a stockholder as to such Restricted Stock, including the right to vote such Restricted Stock, except that the following restrictions shall apply: (i) the Participant shall not be entitled to delivery of the shares of such Restricted Stock until the expiration or termination of the Restricted Period and the satisfaction of any other Conditions prescribed by the Committee, if any; (ii) none of the Restricted Stock may be sold, transferred, assigned, pledged, or otherwise encumbered or disposed of during the Restricted Period and until the satisfaction of other Conditions prescribed by the Committee, if any; and (iii) all of the Restricted Stock shall be forfeited and all rights of the Participant shall terminate without further obligation on the part of the Company unless the Participant shall have remained a regular full-time employee of the Company or any of its subsidiaries or affiliates until the expiration or termination of the Restricted Period and the satisfaction of the other Conditions prescribed by the Committee, if any.  During the Restricted Period, at the sole discretion of the Committee, Dividend Equivalents may be either currently paid or withheld by the Company for the Participant's account, and interest may be paid on the amount of cash dividends withheld at a rate and under such terms as determined by the Committee.  Cash or stock dividends so withheld by the Committee shall not be subject to forfeiture.  Upon the forfeiture of any Restricted Stock, such shares of Common Stock represented by the Restricted Stock shall be transferred to the Company without further action by the Participant.

(f)Restricted Stock Units - At the time a grant of Restricted Stock Units is made, the Committee, in its sole discretion, shall establish a Restricted Period and such additional Conditions as may be deemed appropriate for the incremental lapse or complete lapse of restrictions with respect to all or any portion of such Restricted Stock Units.  The Committee may also, in its sole discretion, shorten or terminate the Restricted Period or waive any Conditions with respect to all or any portion of the Restricted Stock Units.  During the Restricted Period, the Participant will not have the rights and privileges of a stockholder as to such Restricted Stock Units; provided, however, that at the sole discretion of the Committee, Dividend Equivalents may be either currently paid in cash or shares or withheld by the Company for the

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Participant’s account and reinvested in additional Restricted Stock Units.  Each grant of Restricted Stock Units shall be subject to the following restrictions: (i) the Participant shall not be entitled to delivery of the shares of Common Stock corresponding to such Restricted Stock Units until the expiration or termination of the Restricted Period and the satisfaction of any other Conditions prescribed by the Committee, if any; (ii) none of the Restricted Stock Units may be sold, transferred, assigned, pledged, or otherwise encumbered or disposed of during the Restricted Period and until the satisfaction of other Conditions prescribed by the Committee, if any; and (iii) all of the Restricted Stock Units shall be forfeited and all rights of the Participant shall terminate without further obligation on the part of the Company unless the Participant shall have remained a regular full-time employee of the Company or any of its subsidiaries or affiliates until the expiration or termination of the Restricted Period and the satisfaction of the other Conditions prescribed by the Committee, if any.

(g)Other Stock Awards - The Committee may, in its sole discretion, grant Stock Awards other than Restricted Stock grants or Restricted Stock Units, and such Stock Awards may be granted singly, in combination or in tandem with, in replacement of, or as alternatives to grants or rights under this Program or any other employee benefit or compensation plan of the Company, including the plan of any acquired entity.  If the Committee shall stipulate Conditions with respect to such Stock Awards, the Conditions will be set forth in documents evidencing the grant.  If Conditions with respect to such Stock Awards shall require the surrender or forfeiture of other grants or rights under this Program or any other employee benefit or compensation plan of the Company, then the Participant shall not have any rights under such Stock Awards until the grants or rights exchanged have been fully and effectively surrendered or forfeited.

SECTION 7  SETTLEMENT OF AWARDS

(a)Payment of Awards may be in the form of cash, Common Stock or combinations thereof as the Committee shall determine, and with such other restrictions as it may impose.  The Committee may also require or permit Participants to elect to defer the issuance of shares or the settlement of Awards in cash under such rules and procedures as it may establish under the 2005 Program.  It may also provide that deferred settlements include the payment or crediting of interest on the deferral amounts denominated in cash or the payment or crediting of Dividend Equivalents on deferred settlements denominated in shares.

(b)No shares of Common Stock shall be issued to any Participant upon the exercise of an Option until full payment of the purchase price has been made to the Company and the Participant has remitted to the Company the required federal and state withholding taxes, if any.  A Participant shall obtain no rights as a stockholder until certificates for such stock are issued to the Participant or delivered to the MSOP Administrator for credit to the account of the Participant.  Payment of the purchase price or applicable withholding taxes, if any, may be made in whole, or in part, in shares of Common Stock, pursuant to such terms and conditions as may be established from time to time by the Committee.  If payment is made in shares of Common Stock, such stock shall be valued at one hundred percent (100%) of their Fair Market Value on the day the Participant exercised his or her Option or, as regards a withholding tax, such other date when the tax withholding obligation becomes due.  A Participant need not surrender shares of Common Stock as payment; and the Company may, upon the giving of satisfactory evidence of ownership of said Common Stock by Participant, deliver the appropriate number of additional shares of Common Stock reduced by the number of shares required to pay the purchase price and any applicable withholding taxes.  Such form of evidence shall be determined by the Committee.

SECTION 8  DELIVERY OF STOCK CERTIFICATES

(a)Within sixty (60) days after completion of the exercise of an Option or Stock Appreciation Right, or the complete satisfaction of Conditions applicable to a Stock Award, the Company will have delivered to the Participant or to the MSOP Administrator for credit to the account of the Participant certificates representing all shares of Common Stock purchased or received thereunder.  The Company shall not, however, be required to issue or deliver any certificates for its Common Stock prior to the admission of such stock to listing on any stock exchange on which stock may at that time be listed or required to be listed, or prior to registration under the Securities Act of 1933.  The Participant shall have no interest in Common Stock until certificates for such stock are issued or transferred to the Participant or to the MSOP Administrator for credit to the account of the Participant and the Participant becomes the holder of record.

(b)Upon the expiration or termination of the Restricted Period and the satisfaction of other Conditions prescribed by the Committee, if any, the restrictions applicable to a grant of Restricted Stock or Restricted Stock Units

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shall lapse and a stock certificate for the number of shares of Common Stock represented by the Restricted Stock or Restricted Stock Units shall be delivered to the Participant or the Participant's beneficiary, representative, or estate, as the case may be, free of all restrictions, except any that may be imposed by law.  Unless otherwise instructed by a Participant by an irrevocable, written instruction received by the Company at least six months prior to the date that applicable restrictions lapse, the Company shall automatically withhold as payment the number of shares of Common Stock, determined by the Fair Market Value at the date of the lapse, required to pay withholding taxes, if any. 

(c)In no event will the Company be required to deliver any fractional share of Common Stock in connection with any Award.  In the event that a Participant shall be entitled to receive a fraction of a share of Common Stock in connection with an Award granted under this 2005 Program, the Company shall pay in cash, in lieu thereof, the Fair Market Value of such fractional share.

SECTION 9  TAX WITHHOLDING

Prior to the payment or settlement of any Award, the Participant must pay, or make arrangements satisfactory to the Company for the payment of, any and all tax withholding that in the opinion of the Company is required by law.  The Company shall have the right to deduct applicable taxes from any Award payment, to withhold from the shares of Common Stock being issued or delivered in connection with an Award an appropriate number of shares for the payment of taxes required by law, or to take such other action as may be necessary in the opinion of the Company to satisfy all obligations for the withholding of such taxes.

SECTION 10  TRANSFERABILITY

Except as permitted in this Section 10, no Award granted under this 2005 Program may be assigned, transferred (other than a transfer by will or the laws of descent and distribution as provided in Section 11), pledged, or hypothecated (whether by operation of law or otherwise).  Awards granted under this 2005 Program shall not be subject to execution, attachment, or similar process.  The Committee may, in its sole discretion, permit individual Participants to transfer the ownership of all or any of their Nonqualified Options granted under this 2005 Program to (i) the spouse, former spouse, children or grandchildren of such Participant (“Immediate Family Members”), (ii) a trust or trusts for the exclusive benefit of such Immediate Family Members, or (iii) a partnership in which such Immediate Family Members are the only partners, provided that (x) there may be no consideration for any such transfer, and (y) subsequent transfers of transferred Nonqualified Options shall be prohibited except those in accordance with Section 11 (by will or the laws of descent and distribution).  The Committee may, in its sole discretion, create further conditions and requirements for the transfer of Nonqualified Options.  Following transfer, any such Nonqualified Options shall continue to be subject to the same terms and conditions as were applicable immediately prior to transfer, provided that for purposes of Sections 7, 8 and 14 hereof the term “Participant” shall be deemed to refer to the transferee.  The events causing termination of Awards in accordance with Section 11 hereof shall continue to be applied with respect to the original Participant, following which the Nonqualified Options shall be exercisable by the transferee only to the extent, and for the periods specified in Section 11.

SECTION 11  TERMINATION OF AWARDS

(a)If a Participant’s employment with the Company is terminated for any reason other than (i) a Disqualifying Termination, (ii) Retirement, (iii) a termination in connection with which the Participant executes a written release of employment-related claims in favor of the Company that provides (with the approval of the Company) for the nonforfeiture of Options and Stock Appreciation Rights, (iv) a physical or mental disability as recognized under a benefit plan maintained by the Company, or (v) death, and prior to the date of termination the Participant has not fully exercised an Option or Stock Appreciation Right granted under this 2005 Program, such Participant may exercise the Option or Stock Appreciation Right within ninety (90) days following the date of termination (but not beyond the expiration date of such Option or Right) for the number of shares which the Participant could have purchased or received a payment on the date of termination.  At the conclusion of such ninety-day period (with respect to the Participant’s Options and Stock Appreciation Rights, and at the time of termination with respect to any other Awards), participation hereunder shall cease and all of the Participant’s Awards granted under this 2005 Program shall be automatically forfeited unless the documents evidencing such Options or Stock Appreciation Rights provide otherwise.

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(b)If a Participant Retires, terminates employment with the Company and in connection with such termination the Participant executes a written release of employment-related claims in favor of the Company that provides (with the approval of the Company) for the nonforfeiture of Options and Stock Appreciation Rights, or changes employment status as a result of a physical or mental disability as recognized under a benefit plan maintained by the Company, without having fully exercised an Option or Stock Appreciation Right, the Participant shall be entitled, within the remaining term of the Option or Stock Appreciation Right (but not beyond the expiration date of such Option or Right), to exercise such Option or Stock Appreciation Right (provided, however, that in the event of a termination in connection with which the Participant executes a written release of employment-related claims in favor of the Company that provides (with the approval of the Company) for the nonforfeiture of Options and Stock Appreciation Rights, the additional time to exercise Options and Stock Appreciation Rights shall apply only to those Options and Stock Appreciation Rights which have vested prior to the date of termination of employment).  If a Participant who has thus Retired dies, without having fully exercised an Option or Stock Appreciation Right, the Option or Stock Appreciation Right (including any portion thereof not already exercisable at the time of the Participant’s death) may be exercised within two years after the date of his or her death (but not beyond the expiration date of such Option or Right) by the Participant's estate or by a person who acquired the right to exercise such Option or Stock Appreciation Right by bequest or inheritance or by reason of the death of the Participant.

(c)If a Participant, prior to Retirement, dies without having fully exercised an Option or Stock Appreciation Right, the Option or Stock Appreciation Right (including any portion thereof not already exercisable at the time of the Participant’s death) may be exercised within two years following his or her death (but not beyond the expiration date of such Option or Right) by the Participant's estate or by a person who acquired the right to exercise such Option or Stock Appreciation Right by bequest or inheritance or by reason of the death of the Participant.

(d)Notwithstanding paragraph (a) of this section, if a Participant’s employment with the Company is terminated before he or she has fully exercised an Option or Stock Appreciation Right under circumstances which the Committee believes to warrant special consideration and the Committee has determined that the Participant's rights should not be forfeited at the time or times specified in paragraph (a), the Option or Stock Appreciation Right (including any portion thereof not already exercisable at the time of termination) may be exercised within two years following his or her termination of employment (but not beyond the expiration date of such Option or Right).

(e)If a Participant dies, either prior to or following Retirement, or becomes “disabled” within the meaning of section 409A(a)(2)(C) of the Code, and has not yet received the stock certificate for the shares of Common Stock represented by a grant of Restricted Stock, Restricted Stock Units or other Stock Award, then all restrictions imposed during the Restricted Period and any other Conditions prescribed by the Committee, if any, shall automatically lapse and a stock certificate shall be delivered to the Participant or the Participant's beneficiary, representative, or estate, as the case may be upon the Participant’s demonstration to the satisfaction of the Committee that such Participant is considered “disabled” for purposes of section 409A(a)(2)(C) of the Code.

(f)If a Participant’s employment with the Company is terminated due to a Disqualifying Termination, participation hereunder shall cease and all of the Participant’s Awards granted under this 2005 Program shall be automatically forfeited.

(g)If the Committee or the officers to whom it delegates the necessary authority receive or have reason to believe that the Company has received credible evidence that a Participant may have engaged in activity described in the term “Disqualifying Termination” in Section 2(h) of this 2005 Program, the Committee or such officers may suspend the exercise, delivery or settlement of all or any portion of such Participant’s outstanding Awards granted under this 2005 Program pending an investigation of the matter.

SECTION 12  ADJUSTMENTS

In the event of any change in the outstanding Common Stock of the Company by reason of a stock split, stock dividend, combination or reclassification of shares, recapitalization, merger or similar event, the Committee shall adjust proportionately: (a) the number of shares of Common Stock (i) available for issuance or delivery under the 2005 Program in accordance with Section 3, (ii) for which Awards may be granted to a single Participant in accordance with Section 6, and (iii) subject to outstanding Awards granted under the 2005 Program; (b) the purchase prices of outstanding Awards;

7

and (c) the appropriate Fair Market Value and other price determinations for such Awards.  In the event of any other change affecting the Common Stock or any distribution (other than normal cash dividends) to holders of Common Stock, such adjustments in the number or kind of shares and the purchase prices, Fair Market Value and other price determinations of the affected Awards as the Committee shall, in its sole discretion, determine are equitable, shall be made and shall be effective and binding for all purposes of such outstanding Awards.  In the event of a corporate merger, consolidation, acquisition of assets or stock, separation, reorganization or liquidation, the Committee shall be authorized to cause the Company to issue or assume stock options, whether or not in a transaction to which section 424(a) of the Code applies, by means of substitution of new stock options for previously issued stock options or an assumption of previously issued stock options.  In such event, the aggregate number of shares of Common Stock available for issuance or delivery under the 2005 Program in accordance with Section 3 will be increased to reflect such substitution or assumption, and such shares substituted or assumed shall not be counted against the individual Participant maximum set forth in Section 6.

SECTION 13  TERM, AMENDMENT, AND

TERMINATION OF THE 2005 PROGRAM

The 2005 Program shall become effective on the date it is approved by the requisite vote of the stockholders of 3M Company, and shall expire (unless it is terminated before then) on the third anniversary of such effective date.  Such expiration shall not adversely affect Awards granted under the 2005 Program prior to such expiration date.  The Committee may at any time amend or terminate the 2005 Program, except that no amendment or termination shall adversely affect Awards granted under the 2005 Program prior to the effective date of such amendment or termination; provided, however, that no amendment shall be made without the prior approval of the Board of Directors and the holders of a majority of the issued and outstanding shares of Common Stock represented and entitled to vote on such amendment which would (i) increase the aggregate number of shares of Common Stock available for issuance or delivery under the 2005 Program in accordance with Section 3 (except for adjustments made in accordance with Section 12), (ii) permit the granting of Awards with purchase prices lower than those specified in Section 6, or (iii) be a material amendment for which stockholder approval is required by applicable law, regulation or stock exchange rule.

SECTION 14  CHANGE IN CONTROL

(a)For purposes of this Section 14, the following words and phrases shall have the meanings indicated below, unless the context clearly indicates otherwise:

(i)"Person" shall have the meaning associated with that term as it is used in Sections 13(d) and 14(d) of the Act.

(ii)"Affiliates and Associates" shall have the meanings assigned to such terms in Rule 12b-2 promulgated under Section 12 of the Act.

(iii)"Act" means the Securities Exchange Act of 1934.

(iv)"Continuing Directors" shall have the meaning assigned to such term in Article Thirteenth of the Restated Certificate of Incorporation of 3M Company.

(b)Notwithstanding any other provision of this 2005 Program to the contrary. all outstanding Options and Stock Appreciation Rights shall (i) become immediately exercisable in full for the remainder of their respective terms upon the occurrence of a Change in Control of the Company, and (ii) remain exercisable in full for a minimum period of six months following the Change inControl; provided, however, that in no event shall any Option or Stock Appreciation Right be exercisable beyond the original expiration date.

(c)Similarly, all restrictions regarding the Restricted Period or the satisfaction of other Conditions prescribed by the Committee, if any, with respect to grants of Restricted Stock or other Stock Awards, shall automatically lapse, expire, and terminate and the Participant shall be immediately entitled to receive a stock certificate for the number of shares of Common Stock represented by the Restricted Stock or Stock Awards upon the occurrence of a Change in Control.

8

(d)For purposes of this Section 14, a Change in Control of the Company shall be deemed to have occurred only if a “change in the ownership” or a “change in effective control” and/or a “change in the ownership of a substantial portion of the assets” of the Company has taken place (as those terms are defined in Treasury Regulations §1.409A-3(i)(5) or such other regulation or guidance issued under section 409A of the Code).

(e)In the event that the provisions of this Section 14 result in "payments" that are finally determined to be subject to the excise tax imposed by section 4999 of the Code, the Company shall pay to each Participant an additional amount sufficient to fully satisfy such excise tax and any additional federal, state, and local income taxes payable on the additional amount.  Payment of this additional amount shall be made as soon as administratively feasible, but no later than two and one-half months following the end of the Participant’s taxable year in which the amount of the excise tax payable has been determined.

(f)The Company shall pay to each Participant the amount of all reasonable legal and accounting fees and expenses incurred by such Participant in seeking to obtain or enforce his or her rights under this Section 14, or in connection with any income tax audit or proceeding to the extent attributable to the application of section 4999 of the Code to the payments made pursuant to this Section 14, unless a lawsuit commenced by the Participant for such purposes is dismissed by the court as being frivolous or otherwise improper under applicable court rules.  The Company shall also pay to each Participant the amount of all reasonable tax and financial planning fees and expenses incurred by such Participant in connection with such Participant's receipt of payments pursuant to this Section 14.  Payment of these legal and accounting fees and expenses, as well as these tax and financial planning fees and expenses, shall be made as soon as administratively feasible, but no later than two and one-half months following the end of the Participant’s taxable year in which such fees and expenses have been incurred.

SECTION 15  MISCELLANEOUS

(a)Unless otherwise specifically determined by the Committee, settlements of Awards received by Participants under the 2005 Program shall not be deemed a part of any Participant's compensation for purposes of determining such Participant’s payments or benefits under any Company benefit plan, severance program, or severance pay law of any country.  Nothing in this 2005 Program shall prevent the Company from adopting other or additional compensation programs, plans, or arrangements as it deems appropriate or necessary.

(b)The 2005 Program shall be unfunded.  The Company does not intend to create any trust or separate fund in connection with the 2005 Program.  The Company shall not have any obligation to set aside funds or segregate assets to ensure the payment of any Award.  The 2005 Program shall not establish any fiduciary relationship between the Company and any Participant or other person.  To the extent any person holds any rights by virtue of an Award under the 2005 Program, such right (unless otherwise determined by the Committee) shall be no greater than the right of an unsecured general creditor of the Company.

(c)No person shall have any claim or right to be granted an Award under the 2005 Program, and the Participants shall have no rights against the Company except as may otherwise be specifically provided herein.  Nothing in this 2005 Program shall be deemed to give any Participant the right to be retained in the employ of the Company, or to interfere with the right of the Company to discipline or discharge such Participant at any time for any reason whatsoever.

(d)The provisions of this 2005 Program and the documents evidencing Awards granted under this 2005 Program shall be construed and interpreted according to the laws of the State of Minnesota.

(e)In case any provision of this 2005 Program shall be ruled or declared invalid for any reason, said illegality or invalidity shall not affect the remaining provisions, and the remainder of the 2005 Program shall be construed and enforced as if such illegal or invalid provision had never been included herein.

9

EX-12

EXHIBIT12

3M COMPANY AND SUBSIDIARIES

CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Millions)

	Year		Year		Year		Year		Year
	2015		2014		2013		2012		2011
EARNINGS
Income before income taxes	$	6,823	$	7,026	$	6,562	$	6,351	$	6,031
Add:
Interest expense (including amortization of capitalized interest)		171		164		166		191		206
Portion of rent under operating leases representative of the interest component		101		104		103		92		85
Less:
Equity in undistributed income of 20-50% owned companies		5		(1)		(1)		3		4
TOTAL EARNINGS AVAILABLE FOR FIXED CHARGES	$	7,090	$	7,295	$	6,832	$	6,631	$	6,318
FIXED CHARGES
Interest on debt (including capitalized interest)		162		159		166		194		206
Portion of rent under operating leases representative of the interest component		101		104		103		92		85
TOTAL FIXED CHARGES	$	263	$	263	$	269	$	286	$	291
RATIO OF EARNINGS TO FIXED CHARGES		27.0		27.7		25.4		23.2		21.7

EX-18

EXHIBIT 18

February 11, 2016

Board of Directors

3M Company

3M Center

St. Paul, MN 55144

Dear Directors:

We are providing this letter to you for inclusion as an exhibit to your Form 10-K filing pursuant to Item 601 of Regulation S-K.

We have audited the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 and issued our report thereon dated February 11, 2016.  Note 1to the financial statements describes a change in accounting principle from a method which classifies marketable securities on the consolidated balance sheet based on management’s intended holding period to a method which classifies marketable securities based on the nature of the securities and their availability for use in current operations.  It should be understood that the preferability of one acceptable method of accounting over another for the classification of marketable securitieshas not been addressed in any authoritative accounting literature, and in expressing our concurrence below we have relied on management’s determination that this change in accounting principle is preferable.  Based on our reading of management’s stated reasons and justification for this change in accounting principle in the Form 10-K, and our discussions with management as to their judgment about the relevant business planning factors relating to the change, we concur with management that such change represents, in the Company’s circumstances, the adoption of a preferable accounting principle in conformity with Accounting Standards Codification 250, Accounting Changes and Error Corrections.

Very truly yours,

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Minneapolis, Minnesota

EX-21

EXHIBIT21

3M COMPANY AND CONSOLIDATED SUBSIDIARIES (PARENT AND SUBSIDIARIES)

AS OF DECEMBER 31, 2015

Name of Company	Organized Under Law of
Registrant — 3M Company	Delaware
Consolidated subsidiaries of the Registrant:
3M Cogent, Inc.	Delaware
3M Electronic Monitoring, Inc.	Delaware
3M Financial Management Company	Delaware
3M Global Channel Services, Inc.	Delaware
3M Innovative Properties Company	Delaware
3M Investment Management Corporation	Delaware
3M Occupational Safety LLC	Delaware
3M Purification Inc.	Delaware
Aearo Holding LLC	Delaware
Aearo Technologies LLC	Delaware
Capital Safety North America Holdings, Inc.	Delaware
Ceradyne, Inc.	Delaware
3M Unitek Corporation	California
Ivera Medical LLC	California
Meguiar’s, Inc.	California
3M Health Information Systems, Inc.	Maryland
3M Touch Systems, Inc.	Massachusetts
GTA-NHT, Inc.	Massachusetts
DB Industries LLC	Minnesota
Two Harbors Insurance Company	South Carolina
3M Argentina S.A.C.I.F.I.A	Argentina
3M Australia Pty. Ltd.	Australia
3M Purification Pty Limited	Australia
3M Osterreich GmbH	Austria
Rappold Winterthur Technologie GmbH	Austria
3M Belgium BVBA/SPRL	Belgium
3M do Brasil Limitada	Brazil
3M Manaus Ind. Prods. Quims. LTDA	Brazil
3M Canada Company	Canada
Capital Safety Group Canada ULC	Canada
3M Chile S.A.	Chile
3M China Limited	China
3M International Trading (Shanghai) Co., Ltd.	China
3M International Trading (Shenzhen) Co., Ltd.	China
3M Investments (China) Co., Ltd.	China
3M Material Technology (Guangzhou) Co., Ltd.	China
3M Material Technology (Hefei) Co., Ltd.	China
3M Material Technology (Suzhou) Co., Ltd.	China
3M Optical Systems Manufacturing Co., (Shanghai) Ltd.	China
3M Speciality Materials (Shanghai) Co., Ltd.	China
3M Colombia, S.A.	Colombia
3M A/S	Denmark
Suomen 3M Oy	Finland
3M Purification	France
3M France S.A.S.	France
EMFI SAS	France
3M Bricolage & Batiment	France
3M Deutschland GmbH	Germany
3M Real Estate GmbH & Co. KG	Germany
Dyneon GmbH	Germany

Name of Company	Organized Under Law of
Wendt GmbH	Germany
3M Hong Kong Limited	Hong Kong
3M India Limited	India
3M Electronic Monitoring Ltd	Israel
3M ITALIA srl	Italy
3M Japan Limited	Japan
3M Japan Holdings Company	Japan
3M Japan Products Limited	Japan
3M Korea Health and Safety Limited	Korea
3M Korea High Technology Limited	Korea
3M Korea Limited	Korea
3M Asset Management S.a.r.l.	Luxembourg
3M Attenti Holdings S.a.r.l.	Luxembourg
3M Global Capital S.a.r.l.	Luxembourg
Capital Safety Group Sarl	Luxembourg
3M Malaysia Sdn. Bhd.	Malaysia
3M Mexico, S.A. de C.V.	Mexico
3M Nederland B.V.	Netherlands
3M New Zealand Limited	New Zealand
3M Norge A/S	Norway
3M Panama Pacifico S. de R.L.	Panama
3M Peru Industrial S.A.	Peru
3M Poland Sp. z.o.o.	Poland
3M Wroclaw Sp. z.o.o.	Poland
3M Puerto Rico, Inc.	Puerto Rico
3M Romania S.R.L.	Romania
3M Russia, LLC	Russia
3M Innovation Singapore Pte Ltd	Singapore
3M Singapore Private Limited	Singapore
3M Technologies (S) Pte Ltd	Singapore
CUNO Filtration Asia Pte. Ltd.	Singapore
3M South Africa (Propriety) Limited	South Africa
3M Espana S.L.	Spain
3M Svenska AB	Sweden
3M EMEA, GmbH	Switzerland
3M (East) A.G.	Switzerland
3M (Schweiz) GmbH	Switzerland
3M Taiwan Limited	Taiwan
3M Taiwan Optronics Corp.	Taiwan
Alpha Beta Global Tapes & Adhesives Co., Ltd.	Taiwan
3M Thailand Limited	Thailand
3M Sanayi Ve Ticaret A.S.	Turkey
3M Gulf Ltd.	United Arab Emirates
3M Health Care Limited	United Kingdom
3M UK Holdings Limited	United Kingdom
3M United Kingdom PLC.	United Kingdom
Capital Safety Acquisition Limited	United Kingdom
Capital Safety ROW Ltd	United Kingdom
3M Manufacturera Venezuela, S.A.	Venezuela

NOTE: Subsidiary companies excluded from the above listing, if considered in the aggregate, would not constitute a significant subsidiary.

EX-23

EXHIBIT23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Registration Nos. 333-30689, 333-30691, 333-44760, 333-73192, 333-101727, 333-109282, 333-128251, 333-130150, 333-151039, 333-156626, 333-156627, 333-166908, 333-174562, 333-181269, and 333-181270) and Form S-3 (Registration Nos. 333-196003, 33-48089, 333-42660, and 333-109211) of 3M Company of our report dated February 11, 2016 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Minneapolis, Minnesota

February 11, 2016

EX-24

EXHIBIT24

POWER OF ATTORNEY

Each of the undersigned Directors and the Principal Executive, Principal Financial and Principal Accounting Officers of 3M COMPANY, a Delaware corporation (the “Company”), hereby constitute and appoint Inge G. Thulin, Nicholas C. Gangestad, Gregg M. Larson, Eric D. Hammes,Ivan K. Fong, and MatthewJ.  Ginter, and each of them, his or her true and lawful attorneys-in-fact and agents, with full and several power of substitution and resubstitution, for him or her and in his or her name, place and stead in any and all capacities, to sign one or more Annual Reports for the Company’s fiscal year ended December31, 2015, on Form10-K under the Securities Exchange Act of 1934, as amended, any amendments thereto, and all additional amendments thereto, each in such form as they or any one of them may approve, and to file the same with all exhibits thereto and other documents in connection therewith with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done so that such Annual Report or Annual Reports shall comply with the Securities Exchange Act of 1934, as amended, and the applicable Rulesand Regulations adopted or issued pursuant thereto, as fully and to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them or their substitute or resubstitute, may lawfully do or cause to be done by virtue hereof.

The undersigned have signed this Power of Attorney this 2nd day of February2016.

/s/ Inge G. Thulin	/s/ Nicholas C. Gangestad
Inge G. Thulin, Chairman of the Board, President and Chief Executive Officer (Principal Executive Officer and Director)	Nicholas C. Gangestad, Senior Vice President and Chief Financial Officer (Principal Financial Officer)
/s/ Linda G. Alvarado	/s/ Eric D. Hammes
Linda G. Alvarado, Director	Eric D. Hammes, Vice President, Controller and Chief Accounting Officer (Principal Accounting Officer)
/s/ Sondra L. Barbour
Sondra L. Barbour, Director
/s/ Thomas K. Brown	/s/ Muhtar Kent
Thomas K. Brown, Director	Muhtar Kent, Director
/s/ Vance D. Coffman	/s/ Edward M. Liddy
Vance D. Coffman, Director	Edward M. Liddy, Director
/s/ DavidB.  Dillon	/s/ Gregory R. Page
David B. Dillon, Director	Gregory R. Page, Director
/s/ Michael L. Eskew	/s/ Robert J. Ulrich
Michael L. Eskew, Director	Robert J. Ulrich, Director
/s/ Herbert L. Henkel
Herbert L. Henkel, Director

EX-31.1

EXHIBIT31.1

SARBANES-OXLEY SECTION 302 CERTIFICATION

I,Inge G. Thulin, certify that:

1.I have reviewed this annual report on Form 10-K of 3M Company;

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 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.

/s/ Inge G. Thulin

Inge G. Thulin

Chief Executive Officer

February 11, 2016

EX-31.2

EXHIBIT31.2

SARBANES-OXLEY SECTION 302 CERTIFICATION

I, Nicholas C. Gangestad, certify that:

1.I have reviewed this annual report on Form 10-K of 3M Company;

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 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.

/s/ Nicholas C. Gangestad

Nicholas C. Gangestad

Chief Financial Officer

February 11, 2016

EX-32.1

EXHIBIT32.1

SARBANES-OXLEY SECTION 906 CERTIFICATION

In connection with the Annual Report of 3M Company (the “Company”) on Form 10-K for the period ended December 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”),I,Inge G. Thulin, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Inge G. Thulin

Inge G. Thulin

Chief Executive Officer

February 11, 2016

EX-32.2

EXHIBIT32.2

SARBANES-OXLEY SECTION 906 CERTIFICATION

In connection with the Annual Report of 3M Company (the “Company”) on Form 10-K for the period ended December 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”),I, Nicholas C. Gangestad, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Nicholas C. Gangestad

Nicholas C. Gangestad

Chief Financial Officer

February11, 2016

EX-95

EXHIBIT 95

MINE SAFETY DISCLOSURES

For the year 2015, the Company has the following mine safety information to report in accordance with Section 1503(a) of the Act, in connection with the Pittsboro, North Carolina mine, the Little Rock, Arkansas mine, the Corona, California mine, and the Wausau, Wisconsin mine (including Greystone Plant):

										Received
									Received	Notice of
						Total Dollar Value			Notice of	Potential to			Aggregate
Mine or Operating			Section			of MSHA		Total Number	Pattern of	Have Pattern	Legal Actions	Aggregate	Legal Actions
Name/MSHA	Section 104	Section	104(d)	Section	Section	Assessments		of Mining	Violations	Under Section	Pending as of	Legal Actions	Resolved
Identification	S&S Citations	104(b)	Citations and	110(b)(2)	107(a)	Proposed		Related	Under Section	104(e)	Last Day of	Initiated During	During Period
Number	(#)	Orders (#)	Orders (#)	Violations (#)	Orders (#)	($)		Fatalities (#)	104(e) (yes/no)	(yes/no)	Period (#)	Period (#)	(#)
3M Pittsboro ID: 3102153	1	—	—	—	—	$	551	—	No	No	—
3M Little Rock ID: 0300426	11	—	—	—	—	$	13,373	—	No	No	—
3M Corona Plant ID: 0400191	1	—	—	—	—	$	11,135	—	No	No	—
Greystone Plant ID: 4700119	4	—	—	—	—	$	1,595	—	No	No	—
Wausau Plant ID: 4702918	8	—	—	—	—	$	10,535	—	No	No	—
Total	25	—	—	—	—	$	37,189	—			—	1	1

XML

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Jan. 31, 2016	Jun. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	3M Company
Trading Symbol	mmm
Entity Central Index Key	0000066740
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		$ 91.4	$ 96.4
Entity Common Stock, Shares Outstanding		605,038,186
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY

XML

Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statement of Income
Net sales	$ 30,274	$ 31,821	$ 30,871
Operating expenses
Cost of sales	15,383	16,447	16,106
Selling, general and administrative expenses	6,182	6,469	6,384
Research, development and related expenses	1,763	1,770	1,715
Total operating expenses	23,328	24,686	24,205
Operating income	6,946	7,135	6,666
Interest expense and income
Interest expense	149	142	145
Interest income	(26)	(33)	(41)
Total interest expense - net	123	109	104
Income before income taxes	6,823	7,026	6,562
Provision for income taxes	1,982	2,028	1,841
Net income including noncontrolling interest	4,841	4,998	4,721
Less: Net income attributable to noncontrolling interest	8	42	62
Net income attributable to 3M	$ 4,833	$ 4,956	$ 4,659
Weighted average 3M common shares outstanding - basic (in shares)	625.6	649.2	681.9
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 7.72	$ 7.63	$ 6.83
Weighted average 3M common shares outstanding - diluted (in shares)	637.2	662.0	693.6
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$ 7.58	$ 7.49	$ 6.72
Cash dividends paid per 3M common share (in dollars per share)	$ 4.10	$ 3.42	$ 2.54

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Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statement of Comprehensive Income
Net income including noncontrolling interest	$ 4,841	$ 4,998	$ 4,721
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(586)	(942)	(505)
Defined benefit pension and postretirement plans adjustment	489	(1,562)	1,245
Debt and equity securities - unrealized gain (loss)		2
Cash flow hedging instruments - unrealized gain (loss)	25	107	15
Total other comprehensive income (loss), net of tax	(72)	(2,395)	755
Comprehensive income (loss) including noncontrolling interest	4,769	2,603	5,476
Comprehensive (income) loss attributable to noncontrolling interest	(6)	(48)	20
Comprehensive income (loss) attributable to 3M	$ 4,763	$ 2,555	$ 5,496

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Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 1,798	$ 1,897
Marketable securities - current	118	1,439
Accounts receivable - net of allowances of $91 and $94	4,154	4,238
Inventories
Finished goods	1,655	1,723
Work in process	1,008	1,081
Raw materials and supplies	855	902
Total inventories	3,518	3,706
Other current assets	1,398	1,023
Total current assets	10,986	12,303
Marketable securities - non-current	9	15
Investments	117	102
Property, plant and equipment	23,098	22,841
Less: Accumulated depreciation	(14,583)	(14,352)
Property, plant and equipment - net	8,515	8,489
Goodwill	9,249	7,050
Intangible assets - net	2,601	1,435
Prepaid pension benefits	188	46
Other assets	1,053	1,769
Total assets	32,718	31,209
Current liabilities
Short-term borrowings and current portion of long-term debt	2,044	106
Accounts payable	1,694	1,807
Accrued payroll	644	732
Accrued income taxes	332	435
Other current liabilities	2,404	2,884
Total current liabilities	7,118	5,964
Long-term debt	8,753	6,705
Pension and postretirement benefits	3,520	3,843
Other liabilities	1,580	1,555
Total liabilities	$ 20,971	$ 18,067
Commitments and contingencies (Note 14)
3M Company shareholders' equity:
Common stock, par value $.01 per share, Shares outstanding - 2015: 609,330,124; Shares outstanding - 2014: 635,134,594	$ 9	$ 9
Additional paid-in capital	4,791	4,379
Retained earnings	36,575	34,317
Treasury stock	(23,308)	(19,307)
Accumulated other comprehensive income (loss)	(6,359)	(6,289)
Total 3M Company shareholders' equity	11,708	13,109
Noncontrolling interest	39	33
Total equity	11,747	13,142
Total liabilities and equity	$ 32,718	$ 31,209

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Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Consolidated Balance Sheet
Allowances for doubtful accounts receivable	$ 91	$ 94
Common stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	944,033,056	944,033,056
Treasury stock (in shares)	334,702,932	308,898,462
Common stock, Shares outstanding (in shares)	609,330,124	635,134,594

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Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Common Stock and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest	Total
Balance at the beginning of the period at Dec. 31, 2012	$ 4,053	$ 30,679	$ (12,407)	$ (4,750)	$ 465	$ 18,040
Increase (decrease) in equity
Net income		4,659			62	4,721
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment				(418)	(87)	(505)
Defined benefit pension and postretirement plans adjustment				1,240	5	1,245
Cash flow hedging instruments - unrealized gain (loss)				15		15
Total other comprehensive income (loss), net of tax						755
Dividends declared ($3.395 (See Note 6), $3.59 (See Note 6), and $3.075 (See Note 6) per share for 2013, 2014 and 2015)		(2,297)				(2,297)
Sale of subsidiary shares	7				1	8
Stock-based compensation, net of tax impacts	324					324
Reacquired stock			(5,216)			(5,216)
Issuances pursuant to stock option and benefit plans		(625)	2,238			1,613
Balance at the end of the period at Dec. 31, 2013	4,384	32,416	(15,385)	(3,913)	446	17,948
Increase (decrease) in equity
Net income		4,956			42	4,998
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment				(948)	6	(942)
Defined benefit pension and postretirement plans adjustment				(1,562)		(1,562)
Debt and equity securities - unrealized gain (loss)				2		2
Cash flow hedging instruments - unrealized gain (loss)				107		107
Total other comprehensive income (loss), net of tax						(2,395)
Dividends declared ($3.395 (See Note 6), $3.59 (See Note 6), and $3.075 (See Note 6) per share for 2013, 2014 and 2015)		(2,297)				(2,297)
Purchase of subsidiary shares	(434)			25	(461)	(870)
Stock-based compensation, net of tax impacts	438					438
Reacquired stock			(5,643)			(5,643)
Issuances pursuant to stock option and benefit plans		(758)	1,721			963
Balance at the end of the period at Dec. 31, 2014	4,388	34,317	(19,307)	(6,289)	33	13,142
Increase (decrease) in equity
Net income		4,833			8	4,841
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment				(584)	(2)	(586)
Defined benefit pension and postretirement plans adjustment				489		489
Cash flow hedging instruments - unrealized gain (loss)				25		25
Total other comprehensive income (loss), net of tax						(72)
Dividends declared ($3.395 (See Note 6), $3.59 (See Note 6), and $3.075 (See Note 6) per share for 2013, 2014 and 2015)		(1,913)				(1,913)
Stock-based compensation, net of tax impacts	412					412
Reacquired stock			(5,304)			(5,304)
Issuances pursuant to stock option and benefit plans		(662)	1,303			641
Balance at the end of the period at Dec. 31, 2015	$ 4,800	$ 36,575	$ (23,308)	$ (6,359)	$ 39	$ 11,747

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Consolidated Statement of Changes in Equity (Parenthetical) - $ / shares	1 Months Ended		3 Months Ended						12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statement of Changes in Equity
Dividends that have been declared but paid in subsequent period (in dollars per share)	$ 1.025	$ 0.855
Dividends declared in current period (in dollars per share)			$ 1.025	$ 1.025	$ 1.025	$ 0.855	$ 0.855	$ 0.855	$ 3.075	$ 3.59	$ 3.395

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Supplemental Share Information - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Share Information Treasury Stock RollForward
Treasury Stock, Shares, Beginning Balance	308,898,462	280,736,817	256,941,406
Reacquired stock	34,072,584	40,664,061	45,445,610
Issuances pursuant to stock options and benefit plans	(8,268,114)	(12,502,416)	(21,650,199)
Treasury Stock, Shares, Ending Balance	334,702,932	308,898,462	280,736,817

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Consolidated Statement 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 including noncontrolling interest	$ 4,841	$ 4,998	$ 4,721
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities
Depreciation and amortization	1,435	1,408	1,371
Company pension and postretirement contributions	(267)	(215)	(482)
Company pension and postretirement expense	556	391	553
Stock-based compensation expense	276	280	240
Deferred income taxes	395	(146)	(167)
Excess tax benefits from stock-based compensation	(154)	(167)	(92)
Changes in assets and liabilities
Accounts receivable	(58)	(268)	(337)
Inventories	3	(113)	(86)
Accounts payable	9	75	16
Accrued income taxes (current and long-term)	(744)	206	206
Other - net	128	177	(126)
Net cash provided by operating activities	6,420	6,626	5,817
Cash Flows from Investing Activities
Purchases of property, plant and equipment (PP&E)	(1,461)	(1,493)	(1,665)
Proceeds from sale of PP&E and other assets	33	135	128
Acquisitions, net of cash acquired	(2,914)	(94)
Purchases of marketable securities and investments	(652)	(1,280)	(4,040)
Proceeds from maturities and sale of marketable securities and investments	1,952	2,034	4,667
Proceeds from sale of businesses	123		8
Other investing	102	102	46
Net cash used in investing activities	(2,817)	(596)	(856)
Cash Flows from Financing Activities
Change in short-term debt - net	860	27	(2)
Repayment of debt (maturities greater than 90 days)	(800)	(1,625)	(859)
Proceeds from debt (maturities greater than 90 days)	3,422	2,608	824
Purchases of treasury stock	(5,238)	(5,652)	(5,212)
Proceeds from issuance of treasury stock pursuant to stock option and benefit plans	635	968	1,609
Dividends paid to shareholders	(2,561)	(2,216)	(1,730)
Excess tax benefits from stock-based compensation	154	167	92
Purchase of noncontrolling interest		(861)
Other - net	(120)	(19)	32
Net cash used in financing activities	(3,648)	(6,603)	(5,246)
Effect of exchange rate changes on cash and cash equivalents	(54)	(111)	(17)
Net increase (decrease) in cash and cash equivalents	(99)	(684)	(302)
Cash and cash equivalents at beginning of year	1,897	2,581	2,883
Cash and cash equivalents at end of period	$ 1,798	$ 1,897	$ 2,581

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Significant Accounting Policies

12 Months Ended

Dec. 31, 2015

Significant Accounting Policies

Significant Accounting Policies

NOTE 1.  Significant Accounting Policies

Consolidation: 3M is a diversified global manufacturer, technology innovator and marketer of a wide variety of products. All subsidiaries are consolidated. All intercompany transactions are eliminated. As used herein, the term “3M” or “Company” refers to 3M Company and subsidiaries unless the context indicates otherwise.

Basis of presentation: Certain balances relative to prior periods have been reclassified to conform to December 31, 2015 presentation in connection with the following, each of which is further discussed in the indicated section of Note 1:

· Change in method of classification of certain marketable securities previously classified as non-current to current as further discussed in the Marketable securities section; and

· Adoption of Accounting Standards Update (ASU) No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, in the fourth quarter of 2015 on a retrospective basis as further discussed in the New Accounting Pronouncements section.

Foreign currency translation: Local currencies generally are considered the functional currencies outside the United States. Assets and liabilities for operations in local-currency environments are translated at month-end exchange rates of the period reported. Income and expense items are translated at month-end exchange rates of each applicable month. Cumulative translation adjustments are recorded as a component of accumulated other comprehensive income (loss) in shareholders’ equity.

Although local currencies are typically considered as the functional currencies outside the United States, under Accounting Standards Codification (ASC) 830, Foreign Currency Matters, the reporting currency of a foreign entity’s parent is assumed to be that entity’s functional currency when the economic environment of a foreign entity is highly inflationary—generally when its cumulative inflation is approximately 100 percent or more for the three years that precede the beginning of a reporting period. 3M has a subsidiary in Venezuela with operating income representing less than 1.0 percent of 3M’s consolidated operating income for 2015. Since January 1, 2010, the financial statements of the Venezuelan subsidiary have been remeasured as if its functional currency were that of its parent.

The Venezuelan government sets official rates of exchange and conditions precedent to purchase foreign currency at these rates with local currency. Such rates and conditions have been and continue to be subject to change. In January 2014, the Venezuelan government announced that the National Center for Foreign Commerce (CENCOEX), had assumed the role with respect to the continuation of the existing official exchange rate, significantly expanded the use of a second currency auction exchange mechanism called the Complementary System for Foreign Currency Acquirement (or SICAD1), and issued exchange regulations indicating the SICAD1 rate of exchange would be used for payments related to international investments. In late March 2014, the Venezuelan government launched a third foreign exchange mechanism, SICAD2, which it later replaced with another foreign currency exchange platform in February 2015 called the Marginal System of Foreign Currency (SIMADI). The SIMADI rate was described as being derived from daily private bidders and buyers exchanging offers through authorized agents. This rate is approved and published by the Venezuelan Central Bank.

The financial statements of 3M’s Venezuelan subsidiary were remeasured utilizing the official CENCOEX (or its predecessor) rate into March 2014, the SICAD1 rate beginning in late March 2014, the SICAD2 rate beginning in June 2014, and the SIMADI rate beginning in February 2015. 3M’s uses of these rates were based upon evaluation of a number of factors including, but not limited to, the exchange rate the Company’s Venezuelan subsidiary may legally use to convert currency, settle transactions or pay dividends; the probability of accessing and obtaining currency by use of a particular rate or mechanism; and the Company’s intent and ability to use a particular exchange mechanism. Other factors notwithstanding, remeasurement impacts of the changes in use of these exchange rates did not have material impacts on 3M’s consolidated results of operations or financial condition.

The Company continues to monitor circumstances relative to its Venezuelan subsidiary. Changes in applicable exchange rates or exchange mechanisms may continue in the future. These changes could impact the rate of exchange applicable to remeasure the Company’s net monetary assets (liabilities) denominated in Venezuelan Bolivars (VEF). As of December 31, 2015, the Company had a balance of net monetary liabilities denominated in VEF of less than 500 million VEF and the CENCOEX, SICAD (formerly SICAD1), and SIMADI exchange rates were approximately 6 VEF, 13 VEF, and 200 VEF per U.S. dollar, respectively.

A need to deconsolidate the Company’s Venezuelan subsidiary’s operations may result from a lack of exchangeability of VEF-denominated cash coupled with an acute degradation in the ability to make key operational decisions due to government regulations in Venezuela. 3M monitors factors such as its ability to access various exchange mechanisms; the impact of government regulations on the Company’s ability to manage its Venezuelan subsidiary’s capital structure, purchasing, product pricing, and labor relations; and the current political and economic situation within Venezuela. Based upon such factors as of December 31, 2015, the Company continues to consolidate its Venezuelan subsidiary. As of December 31, 2015, the balance of intercompany receivables due from this subsidiary and its equity balance are not significant.

Reclassifications: Certain amounts in the prior years’ consolidated financial statements have been reclassified to conform to the current year presentation.

Use of estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

Cash and cash equivalents: Cash and cash equivalents consist of cash and temporary investments with maturities of three months or less when acquired.

Marketable securities: Effective December 31, 2015, the Company changed the method of classification of certain securities previously classified as non-current to current. This new method classifies these securities as current or non-current based on the nature of the securities and availability for use in current operations while the prior classification was based on management’s intended holding period, the security’s maturity date and liquidity considerations based on market conditions. The Company believes this method is preferable because it is consistent with how the Company manages its capital structure and liquidity. The prior period balance has been reclassified to conform to the current year presentation:

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adjusted
Marketable securities - current	$	626	$	813	$	1,439
Marketable securities - non-current		828		(813)		15
Total marketable securities	$	1,454	$	—	$	1,454

3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders’ equity. Such an unrealized loss does not reduce net income for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.

Investments: Investments primarily include equity method, cost method, and available-for-sale equity investments. Available-for-sale investments are recorded at fair value. Unrealized gains and losses relating to investments classified as available-for-sale are recorded as a component of accumulated other comprehensive income (loss) in shareholders’ equity.

Other assets: Other assets include deferred income taxes, product and other insurance receivables, the cash surrender value of life insurance policies, and other long-term assets. Investments in life insurance are reported at the amount that could be realized under contract at the balance sheet date, with any changes in cash surrender value or contract value during the period accounted for as an adjustment of premiums paid. Cash outflows and inflows associated with life insurance activity are included in “Purchases of marketable securities and investments” and “Proceeds from maturities and sale of marketable securities and investments,” respectively.

Inventories: Inventories are stated at the lower of cost or market, with cost generally determined on a first-in, first-out basis.

Property, plant and equipment: Property, plant and equipment, including capitalized interest and internal engineering costs, are recorded at cost. Depreciation of property, plant and equipment generally is computed using the straight-line method based on the estimated useful lives of the assets. The estimated useful lives of buildings and improvements primarily range from ten to forty years, with the majority in the range of twenty to forty years. The estimated useful lives of machinery and equipment primarily range from three to fifteen years, with the majority in the range of five to ten years. Fully depreciated assets are retained in property and accumulated depreciation accounts until disposal. Upon disposal, assets and related accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposal, is charged or credited to operations. Property, plant and equipment amounts are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss would be recognized when the carrying amount of an asset exceeds the estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition. The amount of the impairment loss recorded is calculated by the excess of the asset’s carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.

Conditional asset retirement obligations: A liability is initially recorded at fair value for an asset retirement obligation associated with the retirement of tangible long-lived assets in the period in which it is incurred if a reasonable estimate of fair value can be made. Conditional asset retirement obligations exist for certain long-term assets of the Company. The obligation is initially measured at fair value using expected present value techniques. Over time the liabilities are accreted for the change in their present value and the initial capitalized costs are depreciated over the remaining useful lives of the related assets. The asset retirement obligation liability was $102 million and $96 million at December 31, 2015 and 2014, respectively.

Goodwill: Goodwill is the excess of cost of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized. Goodwill is tested for impairment annually in the fourth quarter of each year, and is tested for impairment between annual tests if an event occurs or circumstances change that would indicate the carrying amount may be impaired. Impairment testing for goodwill is done at a reporting unit level, with all goodwill assigned to a reporting unit. Reporting units are one level below the business segment level, but can be combined when reporting units within the same segment have similar economic characteristics. 3M did not combine any of its reporting units for impairment testing. An impairment loss generally would be recognized when the carrying amount of the reporting unit’s net assets exceeds the estimated fair value of the reporting unit. The estimated fair value of a reporting unit is determined using earnings for the reporting unit multiplied by a price/earnings ratio for comparable industry groups, or by using a discounted cash flow analysis. Companies have the option to first assess qualitative factors to determine whether the fair value of a reporting unit is not “more likely than not” less than its carrying amount, which is commonly referred to as “Step 0”. 3M has chosen not to apply Step 0 for 2015 or prior period annual goodwill assessments.

Intangible assets: Intangible asset types include customer related, patents, other technology-based, tradenames and other intangible assets acquired from an independent party. Intangible assets with a definite life are amortized over a period ranging from one to twenty years on a systematic and rational basis (generally straight line) that is representative of the asset’s use. The estimated useful lives vary by category, with customer related largely between seven to seventeen years, patents largely between five to thirteen years, other technology-based largely between two to fifteen years, definite lived tradenames largely between three and twenty years, and other intangibles largely between two to ten years. Costs related to internally developed intangible assets, such as patents, are expensed as incurred, primarily in “Research, development and related expenses.”

Intangible assets with a definite life are tested for impairment whenever events or circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss is recognized when the carrying amount of an asset exceeds the estimated undiscounted cash flows used in determining the fair value of the asset. The amount of the impairment loss recorded is calculated by the excess of the asset’s carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.

Intangible assets with an indefinite life, namely certain tradenames, are not amortized. Indefinite-lived intangible assets are tested for impairment annually, and are tested for impairment between annual tests if an event occurs or circumstances change that would indicate that the carrying amount may be impaired. An impairment loss generally would be recognized when the fair value is less than the carrying value of the indefinite-lived intangible asset.

Restructuring actions: Restructuring actions generally include significant actions involving employee-related severance charges, contract termination costs, and impairment or accelerated depreciation/amortization of assets associated with such actions. Employee-related severance charges are largely based upon distributed employment policies and substantive severance plans. These charges are reflected in the quarter when the actions are probable and the amounts are estimable, which typically is when management approves the associated actions. Severance amounts for which affected employees were required to render service in order to receive benefits at their termination dates were measured at the date such benefits were communicated to the applicable employees and recognized as expense over the employees’ remaining service periods. Contract termination and other charges primarily reflect costs to terminate a contract before the end of its term (measured at fair value at the time the Company provided notice to the counterparty) or costs that will continue to be incurred under the contract for its remaining term without economic benefit to the Company. Asset impairment charges related to intangible assets and property, plant and equipment reflect the excess of the assets’ carrying values over their fair values.

Revenue (sales) recognition: The Company sells a wide range of products to a diversified base of customers around the world and has no material concentration of credit risk. Revenue is recognized when the risks and rewards of ownership have substantively transferred to customers. This condition normally is met when the product has been delivered or upon performance of services. The Company records estimated reductions to revenue or records expense for customer and distributor incentives, primarily comprised of rebates and free goods, at the time of the initial sale. These sales incentives are accounted for in accordance with ASC 605, Revenue Recognition. The estimated reductions of revenue for rebates are based on the sales terms, historical experience, trend analysis and projected market conditions in the various markets served. Since the Company serves numerous markets, the rebate programs offered vary across businesses, but the most common incentive relates to amounts paid or credited to customers for achieving defined volume levels or growth objectives. Free goods are accounted for as an expense and recorded in cost of sales. Sales, use, value-added and other excise taxes are not recognized in revenue.

The vast majority of 3M’s sales agreements are for standard products and services with customer acceptance occurring upon delivery of the product or performance of the service. However, to a limited extent 3M also enters into agreements that involve multiple elements (such as equipment, installation and service), software, or non-standard terms and conditions.

For non-software multiple-element arrangements, the Company recognizes revenue for delivered elements when they have stand-alone value to the customer, they have been accepted by the customer, and for which there are only customary refund or return rights. Arrangement consideration is allocated to the deliverables by use of the relative selling price method. The selling price used for each deliverable is based on vendor-specific objective evidence (VSOE) if available, third-party evidence (TPE) if VSOE is not available, or estimated selling price if neither VSOE nor TPE is available. Estimated selling price is determined in a manner consistent with that used to establish the price to sell the deliverable on a standalone basis. In addition to the preceding conditions, equipment revenue is not recorded until the installation has been completed if equipment acceptance is dependent upon installation or if installation is essential to the functionality of the equipment. Installation revenues are not recorded until installation has been completed.

For arrangements (or portions of arrangements) falling within software revenue recognition standards and that do not involve significant production, modification, or customization, revenue for each software or software-related element is recognized when the Company has VSOE of the fair value of all of the undelivered elements and applicable criteria have been met for the delivered elements. When the arrangements involve significant production, modification or customization, long-term construction-type accounting involving proportional performance is generally employed.

For prepaid service contracts, sales revenue is recognized on a straight-line basis over the term of the contract, unless historical evidence indicates the costs are incurred on other than a straight-line basis. License fee revenue is recognized as earned, and no revenue is recognized until the inception of the license term.

On occasion, agreements will contain milestones, or 3M will recognize revenue based on proportional performance. For these agreements, and depending on the specifics, 3M may recognize revenue upon completion of a substantive milestone, or in proportion to costs incurred to date compared with the estimate of total costs to be incurred.

Accounts receivable and allowances: Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for bad debts, cash discounts, product returns and various other items. The allowance for doubtful accounts and product returns is based on the best estimate of the amount of probable credit losses in existing accounts receivable and anticipated sales returns. The Company determines the allowances based on historical write-off experience by industry and regional economic data and historical sales returns. The Company reviews the allowance for doubtful accounts monthly. The Company does not have any significant off-balance-sheet credit exposure related to its customers.

Advertising and merchandising: These costs are charged to operations in the period incurred, and totaled $368 million in 2015,  $407 million in 2014 and $423 million in 2013.

Research, development and related expenses: These costs are charged to operations in the period incurred and are shown on a separate line of the Consolidated Statement of Income. Research, development and related expenses totaled $1.763 billion in 2015,  $1.770 billion in 2014 and $1.715 billion in 2013. Research and development expenses, covering basic scientific research and the application of scientific advances in the development of new and improved products and their uses, totaled $1.223 billion in 2015,  $1.193 billion in 2014 and $1.150 billion in 2013. Related expenses primarily include technical support; internally developed patent costs, which include costs and fees incurred to prepare, file, secure and maintain patents; amortization of externally acquired patents and externally acquired in-process research and development; and gains/losses associated with certain corporate approved investments in R&D-related ventures, such as equity method effects and impairments.

Internal-use software: The Company capitalizes direct costs of services used in the development of internal-use software. Amounts capitalized are amortized over a period of three to seven years, generally on a straight-line basis, unless another systematic and rational basis is more representative of the software’s use. Amounts are reported as a component of either machinery and equipment or capital leases within property, plant and equipment.

Environmental: Environmental expenditures relating to existing conditions caused by past operations that do not contribute to current or future revenues are expensed. Reserves for liabilities related to anticipated remediation costs are recorded on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies, the Company’s commitment to a plan of action, or approval by regulatory agencies. Environmental expenditures for capital projects that contribute to current or future operations generally are capitalized and depreciated over their estimated useful lives.

Income taxes: The provision for income taxes is determined using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. The Company records a valuation allowance to reduce its deferred tax assets when uncertainty regarding their realizability exists. As of December 31, 2015 and 2014, the Company had valuation allowances of $31 million and $22 million on its deferred tax assets, respectively. The increase in valuation allowance at December 31, 2015 relates to current acquisitions in certain international jurisdictions. The Company recognizes and measures its uncertain tax positions based on the rules under ASC 740, Income Taxes.

Earnings per share: The difference in the weighted average 3M shares outstanding for calculating basic and diluted earnings per share attributable to 3M common shareholders is the result of the dilution associated with the Company’s stock-based compensation plans. Certain options outstanding under these stock-based compensation plans during the years 2015,  2014 and 2013 were not included in the computation of diluted earnings per share attributable to 3M common shareholders because they would not have had a dilutive effect (5.0 million average options for 2015,  1.4 million average options for 2014, and 2.0 million average options for 2013). The computations for basic and diluted earnings per share for the years ended December 31 follow:

Earnings Per Share Computations

(Amounts in millions, except per share amounts)	2015		2014		2013
Numerator:
Net income attributable to 3M	$	4,833	$	4,956	$	4,659
Denominator:
Denominator for weighted average 3M common shares outstanding — basic		625.6		649.2		681.9
Dilution associated with the Company’s stock-based compensation plans		11.6		12.8		11.7
Denominator for weighted average 3M common shares outstanding — diluted		637.2		662.0		693.6
Earnings per share attributable to 3M common shareholders — basic	$	7.72	$	7.63	$	6.83
Earnings per share attributable to 3M common shareholders — diluted	$	7.58	$	7.49	$	6.72

Stock-based compensation: The Company recognizes compensation expense for its stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees’ Stock Purchase Plan (GESPP). Under applicable accounting standards, the fair value of share-based compensation is determined at the grant date and the recognition of the related expense is recorded over the period in which the share-based compensation vests. Refer to Note 15 for additional information.

Comprehensive income: Total comprehensive income and the components of accumulated other comprehensive income (loss) are presented in the Consolidated Statement of Comprehensive Income and the Consolidated Statement of Changes in Equity. Accumulated other comprehensive income (loss) is composed of foreign currency translation effects (including hedges of net investments in international companies), defined benefit pension and postretirement plan adjustments, unrealized gains and losses on available-for-sale debt and equity securities, and unrealized gains and losses on cash flow hedging instruments.

Derivatives and hedging activities: All derivative instruments within the scope of ASC 815, Derivatives and Hedging, are recorded on the balance sheet at fair value. The Company uses interest rate swaps, currency and commodity price swaps, and foreign currency forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity market volatility. All hedging instruments that qualify for hedge accounting are designated and effective as hedges, in accordance with U.S. generally accepted accounting principles. If the underlying hedged transaction ceases to exist, all changes in fair value of the related derivatives that have not been settled are recognized in current earnings. Instruments that do not qualify for hedge accounting are marked to market with changes recognized in current earnings. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the items subject to designated hedge or undesignated (economic) hedge relationships. The Company does not hold or issue derivative financial instruments for trading purposes and is not a party to leveraged derivatives.

Credit risk: The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company’s risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. The Company does not anticipate nonperformance by any of these counterparties. 3M has elected to present the fair value of derivative assets and liabilities within the Company’s consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation.

Fair value measurements: 3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Acquisitions: The Company accounts for business acquisitions in accordance with ASC 805, Business Combinations.  This standard requires the acquiring entity in a business combination to recognize all (and only) the assets acquired and liabilities assumed in the transaction and establishes the acquisition-date fair value as the measurement objective for all assets acquired and liabilities assumed in a business combination. Certain provisions of this standard prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.

New Accounting Pronouncements

In April 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changed the criteria for determining which disposals can be presented as discontinued operations and modified related disclosure requirements. This standard has the impact of reducing the frequency of disposals reported as discontinued operations, by requiring such a disposal to represent a strategic shift that has or will have a major effect on an entity’s operations and financial results. However, existing provisions that prohibited an entity from reporting a discontinued operation if it had certain continuing cash flows or involvement with the component after disposal were eliminated by this standard. The ASU also expands the disclosures for discontinued operations and requires new disclosures related to individually significant disposals that do not qualify as discontinued operations. For 3M, this ASU was effective prospectively beginning January 1, 2015. This ASU was applied to the 2015 divestiture information discussed in Note 2 and had no material impact on consolidated results of operations and financial condition.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, and in August 2015 issued ASU No. 2015-14, which amended ASU No. 2014-09 as to effective date. The ASU, as amended, provides a single comprehensive model to be used in the accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The standard’s stated core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this core principle the ASU includes provisions within a five step model that includes identifying the contract with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations, and recognizing revenue when (or as) an entity satisfies a performance obligation. The standard also specifies the accounting for some costs to obtain or fulfill a contract with a customer and requires expanded disclosures about revenue recognition. The standard provides for either full retrospective adoption or a modified retrospective adoption by which it is applied only to the most current period presented. For 3M, the ASU, as amended, is effective January 1, 2018. The Company is currently assessing this standard’s impact on 3M’s consolidated results of operations and financial condition.

In February 2015, the FASB issued ASU No. 2015-02, Amendments to the Consolidation Analysis, which changes guidance related to both the variable interest entity (VIE) and voting interest entity (VOE) consolidation models. With respect to the VIE model, the standard changes, among other things, the identification of variable interests associated with fees paid to a decision maker or service provider, the VIE characteristics for a limited partner or similar entity, and the primary beneficiary determination. With respect to the VOE model, the ASU eliminates the presumption that a general partner controls a limited partnership or similar entity unless the presumption can otherwise be overcome. Under the new guidance, a general partner would largely not consolidate a partnership or similar entity under the VOE model. For 3M, this ASU is effective January 1, 2016, with early adoption permitted. 3M does not have significant involvement with entities subject to consolidation considerations impacted by the VIE model changes or with limited partnerships potentially impacted by the VOE model changes. As a result, 3M does not expect this ASU to have a material impact on the Company’s consolidated results of operations and financial condition.

In April 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and in August 2015 issued ASU No. 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements. Under ASU 2015-03, debt issuance costs reported on the consolidated balance sheet would be reflected as a direct deduction from the related debt liability rather than as an asset. While ASU 2015-03 addresses costs related to term debt, ASU No. 2015-15 provides clarification regarding costs to secure revolving lines of credit, which are, at the outset, not associated with an outstanding borrowing. ASU No. 2015-15 provides commentary that the SEC staff would not object to an entity deferring and presenting costs associated with line-of-credit arrangements as an asset and subsequently amortizing them ratably over the term of the revolving debt arrangement. For 3M, ASU No. 2015-03 is effective January 1, 2016, with early adoption permitted. The Company adopted this ASU in the fourth quarter of 2015 with retrospective application to prior periods. As a result, debt issue costs aggregating $26 million previously included within Other Assets have been reflected as reductions in the balances of Long-Term Debt as of December 31, 2014.

In April 2015, the FASB issued ASU No. 2015-05, Customer’s Accounting for Fees Paid in a Cloud Arrangement, which requires a customer to determine whether a cloud computing arrangement contains a software license. If the arrangement contains a software license, the customer would account for fees related to the software license element in a manner consistent with accounting for the acquisition of other acquired software licenses. If the arrangement does not contain a software license, the customer would account for the arrangement as a service contract. An arrangement would contain a software license element if both (1) the customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty and (2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. For 3M, this ASU is effective January 1, 2016, with early adoption permitted. The standard provides for adoption either fully retrospectively or prospectively to arrangements entered into, or materially modified, after the effective date. The Company does not expect this ASU to have a material impact on 3M’s consolidated results of operations and financial condition.

In May 2015, the FASB issued ASU No. 2015-07, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). This standard modifies existing disclosure requirements such that investments for which the practical expedient is used to measure their fair value at net asset value (NAV) would be removed from the fair value hierarchy disclosures. Instead, an entity would be required to include those investments as a reconciling item such that the total fair value amount of investments in the fair value hierarchy disclosure is consistent with the amount on the balance sheet. Changes were also made to the requirements in a sponsor’s employee benefit plan asset disclosures. For 3M, this standard is effective January 1, 2016, with early adoption permitted. The Company adopted this ASU in the fourth quarter of 2015 with retrospective application to prior periods. As a result, Note 11, Pension and Postretirement Benefit Plans, reflects the modified disclosures with respect to applicable plan assets. As this ASU only relates to certain disclosures, it did not impact the Company’s consolidated results of operations and financial condition.

In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which modifies existing requirements regarding measuring inventory at the lower of cost or market. Under existing standards, the market amount requires consideration of replacement cost, net realizable value (NRV), and NRV less an approximately normal profit margin. The new ASU replaces market with NRV, defined as estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This eliminates the need to determine and consider replacement cost or NRV less an approximately normal profit margin when measuring inventory. For 3M, this standard is effective prospectively beginning January 1, 2017, with early adoption permitted. The Company is currently assessing this ASU’s impacts on 3M’s consolidated results of operations and financial condition.

In September 2015, the FASB issued ASU No. 2015-16, Simplifying the Accounting for Measurement-Period Adjustments, that eliminates the requirement for an acquirer in a business combination to account for measurement-period adjustments retrospectively. Under existing standards, an acquirer in a business combination reports provisional amounts with respect to acquired assets and liabilities when their measurements are incomplete as of the end of the reporting period. Prior to the impact of this ASU, an acquirer is required to adjust provisional amounts (and the related impact on earnings) by restating prior period financial statements during the measurement period which cannot exceed one year from the date of acquisition. The new guidance requires that the cumulative impact of a measurement-period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified—eliminating the requirement to restate prior period financial statements. The new standard requires disclosure of the nature and amount of measurement-period adjustments as well as information with respect to the portion of the adjustments recorded in current-period earnings that would have been recorded in previous reporting periods if the adjustments to provisional amounts had been recognized as of the acquisition date. The ASU is applied prospectively to measurement-period adjustments that occur after the effective date. For 3M, this standard is required prospectively beginning January 1, 2016, with early adoption permitted. The Company adopted this standard with respect to measurement-period adjustments beginning in the fourth quarter of 2015. Additional disclosure, as applicable, is included in Note 2, Acquisitions and Divestitures.

In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, which requires entities to present deferred tax assets (DTAs) and deferred tax liabilities (DTLs), along with any related valuation allowance, as noncurrent in a balance sheet. This ASU eliminates current guidance requiring deferred taxes for each jurisdiction to be presented as a net current asset or liability and a net noncurrent asset or liability. As a result, each jurisdiction would have one net noncurrent DTA or DTL balance. The ASU does not change the existing requirement that only permits offsetting DTAs and DTLs within a particular jurisdiction. For 3M, this standard is effective January 1, 2017, with early adoption permitted. In light of the process simplification provided by this ASU, the Company adopted this standard in the fourth quarter of 2015 with retrospective application to prior periods. As a result, the December 31, 2014 balances of DTAs and DTLs previously reported were impacted as follows:

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adopted
Prepaid expenses and other (within other current assets)	$	595	$	169	$	764
Other current tax assets (within other current assets)		444		(444)		—
Deferred tax assets (within other assets)		889		241		1,130
Deferred tax liabilities (within other current liabilities)		34		(34)		—

In conjunction with the adoption of this ASU, 3M reclassified $169 million of remaining other current tax assets to prepaid expenses and other to conform to the 2015 presentation.

In January 2016, the FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, which revises the accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. The ASU also amends certain disclosure requirements associated with the fair value of financial instruments. The new guidance requires the fair value measurement of investments in equity securities and other ownership interests in an entity, including investments in partnerships, unincorporated joint ventures and limited liability companies (collectively, equity securities) that do not result in consolidation and are not accounted for under the equity method. Entities will need to measure these investments and recognize changes in fair value in net income. Entities will no longer be able to recognize unrealized holding gains and losses on equity securities they classify under current guidance as available for sale in other comprehensive income (OCI). They also will no longer be able to use the cost method of accounting for equity securities that do not have readily determinable fair values. Instead, for these types of equity investments that do not otherwise qualify for the net asset value practical expedient, entities will be permitted to elect a practicability exception and measure the investment at cost less impairment plus or minus observable price changes (in orderly transactions). The ASU also establishes an incremental recognition and disclosure requirement related to the presentation of fair value changes of financial liabilities for which the fair value option (FVO) has been elected. Under this guidance, an entity would be required to separately present in OCI the portion of the total fair value change attributable to instrument-specific credit risk as opposed to reflecting the entire amount in earnings. For derivative liabilities for which the FVO has been elected, however, any changes in fair value attributable to instrument-specific credit risk would continue to be presented in net income, which is consistent with current guidance. For 3M, this standard is effective beginning January 1, 2018 via a cumulative-effect adjustment to beginning retained earnings, except for guidance relative to equity securities without readily determinable fair values which is applied prospectively. The Company is currently assessing this ASU’s impacts on 3M’s consolidated results of operations and financial condition.

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Acquisitions and Divestitures

12 Months Ended

Dec. 31, 2015

Acquisitions and Divestitures

Acquisitions and Divestitures

NOTE 2.  Acquisitions and Divestitures

Acquisitions:

3M makes acquisitions of certain businesses from time to time that are aligned with its strategic intent with respect to, among other factors, growth markets and adjacent product lines or technologies.

The impact on the consolidated balance sheet of the purchase price allocations related to 2015 acquisitions and assigned weighted-average intangible asset lives, including adjustments relative to other acquisitions within the measurement period, follows.The allocation of purchase consideration related to the August 2015 Capital Safety and Polypore Separations Media acquisitions is considered preliminary, primarily with respect to certain tax-related assets and liabilities. 3M expects to finalize the allocation of purchase price within the one year measurement-period following these acquisitions. Adjustments to preliminary allocations primarily related to the identification and valuation of certain indefinite-lived intangible assets (further discussed below). The change to provisional amounts resulted in an immaterial impact to results of operations in the fourth quarter of 2015, a portion of which relates to earlier quarters in the measurement period.

	2015 Acquisition Activity
									Finite-Lived
									Intangible-Asset
(Millions)	Capital		Polypore						Weighted-Average
Asset (Liability)	Safety		Separations Media		Other		Total		Lives (Years)
Accounts receivable	$	66	$	30	$	7	$	103
Inventory		63		35		4		102
Other current assets		10		1		1		12
Property, plant, and equipment		36		128		7		171
Purchased finite-lived intangible assets:
Customer related intangible assets		445		270		40		755	16
Patents		44		11		7		62	7
Other technology-based intangible assets		85		42		1		128	7
Definite-lived tradenames		26		6		1		33	16
Other amortizable intangible assets		—		—		2		2	4
Purchased indefinite-lived intangible assets		520		—		—		520
Purchased goodwill		1,764		636		95		2,495
Accounts payable and other liabilities, net of other assets		(105)		(122)		(5)		(232)
Interest bearing debt		(766)		—		—		(766)
Deferred tax asset/(liability)		(464)		—		(7)		(471)
Net assets acquired	$	1,724	$	1,037	$	153	$	2,914
Supplemental information:
Cash paid	$	1,758	$	1,037	$	154	$	2,949
Less: Cash acquired		34		—		1		35
Cash paid, net of cash acquired	$	1,724	$	1,037	$	153	$	2,914

3M completed one acquisition (Treo Solutions, LLC) during 2014, the impact of which on the consolidated balance sheet was not considered material. Separately, as discussed in Note 6, during 2014, 3M (via Sumitomo 3M Limited) purchased Sumitomo Electric Industries, Ltd.’s 25 percent interest in 3M’s consolidated Sumitomo 3M Limited subsidiary for 90 billion Japanese Yen. Because 3M already had a controlling interest in this consolidated subsidiary, this transaction was separately recorded as a financing activity in the statement of cash flows.

There were no acquisitions that closed during 2013.

Goodwill resulting from business combinations is largely attributable to the existing workforce of the acquired businesses and synergies expected to arise after 3M’s acquisition of these businesses. Pro forma information related to acquisitions was not included because the impact on the Company’s consolidated results of operations was not considered to be material.

In addition to business combinations, 3M periodically acquires certain tangible and/or intangible assets and purchases interests in certain enterprises that do not otherwise qualify for accounting as business combinations. These transactions are largely reflected as additional asset purchase and investment activity.

2015 acquisitions:

In March 2015, 3M (Health Care Business) purchased all of the outstanding shares of Ivera Medical Corp., headquartered in San Diego, California. Ivera Medical Corp. is a manufacturer of health care products that disinfect and protect devices used for access into a patient’s bloodstream. In addition, in the first quarter of 2015, 3M (Industrial Business) purchased the remaining interest in a former equity method investment for an immaterial amount.

In August 2015, 3M (Safety and Graphics Business) acquired all of the outstanding shares of Capital Safety Group S.A.R.L., with operating headquarters in Bloomington, Minnesota, from KKR & Co. L.P. for $1.7 billion, net of cash acquired. The net assets acquired included the assumption of $0.8 billion of debt. Capital Safety is a leading global provider of fall protection equipment.

In August 2015, 3M (Industrial Business) acquired the assets and liabilities associated with Polypore International, Inc.’s Separations Media business, headquartered in Wuppertal, Germany, for $1.0 billion. Polypore’s Separations Media business is a leading provider of microporous membranes and modules for filtration in the life sciences, industrial and specialty segments.

Purchased identifiable finite-lived intangible assets related to acquisition activity in 2015 totaled $1.0 billion. The associated finite-lived intangible assets acquired in 2015 will be amortized on a systematic and rational basis (generally straight line) over a weighted-average life of 14 years (lives ranging from two to 20 years). Indefinite-lived intangible assets of $520 million relate to certain tradenames associated with the Capital Safety acquisition which have been in existence for over 55 years, have a history of leading market-share positions, have been and are intended to be continuously renewed, and the associated products of which are expected to generate cash flows for 3M for an indefinite period of time. Acquired in-process research and development and identifiable intangible assets for which significant assumed renewals or extensions of underlying arrangements impacted the determination of their useful lives were not material.

2014 acquisitions:

During 2014, 3M completed one business combination. The purchase price paid for this business combination (net of cash acquired) and the impact of other matters (net) during 2014 aggregated to $94 million.

In April 2014, 3M (Health Care Business) purchased all of the outstanding equity interests of Treo Solutions LLC, headquartered in Troy, New York. Treo Solutions LLC is a provider of data analytics and business intelligence to healthcare payers and providers.

Purchased identifiable finite-lived intangible assets related to acquisition activity in 2014 totaled $34 million. The associated finite-lived intangible assets acquired in 2014 will be amortized on a systematic and rational basis (generally straight line) over a weighted-average life of six years (lives ranging from three to 10 years). Acquired in-process research and development and identifiable intangible assets for which significant assumed renewals or extensions of underlying arrangements impacted the determination of their useful lives were not material.

Divestitures:

3M may divest certain businesses from time to time based upon review of the Company’s portfolio considering, among other items, factors relative to the extent of strategic and technological alignment and optimization of capital deployment, in addition to considering if selling the businesses results in the greatest value creation for the Company and for shareholders.

In January 2015, 3M (Electronics and Energy Business) completed the sale of its global Static Control business to Desco Industries Inc., based in Chino, California. 2014 sales of this business were $46 million. This transaction was not considered material.

In the fourth quarter of 2015, 3M (Safety and Graphics Business) entered into agreements with One Equity Partners Capital Advisors L.P. (OEP) to sell the assets of 3M’s library systems business. The sales of the North American business and the majority of the business outside of North America closed in October and November 2015, respectively. The sale of the remainder of the library systems business is expected to close in the first quarter of 2016. In December 2015, 3M (Safety and Graphics Business) also completed the sale of Faab Fabricauto, a wholly-owned subsidiary of 3M, to Hills Numberplates Limited. The library systems business, part of the Traffic Safety and Security Division, delivers circulation management solutions to library customers with on-premise hardware and software, maintenance and service, and an emerging cloud-based digital lending platform. Faab Fabricauto, also part of the Traffic Safety and Security Division, is a leading French manufacturer of license plates and signage solutions. The aggregate cash proceeds relative to the 2015 global library systems and Faab Fabricauto divestiture transactions was $104 million. The Company recorded a net pre-tax gain of $40 million (approximately $10 million after tax) in 2015 as a result of the sale and any adjustment of carrying value.

In January 2016, 3M (Industrial Business Group) entered into an agreement to sell to Innovative Chemical Products Group, a portfolio company of Audax Private Equity, the assets of 3M’s pressurized polyurethane foam adhesives business (formerly known as Polyfoam). This business is a provider of pressurized polyurethane foam adhesive formulations and systems into the residential roofing, commercial roofing and insulation and industrial foam segments in the United States with annual sales of approximately $20 million. The transaction is expected to close in the first quarter of 2016, subject to customary close conditions.

In June 2013, 3M (Consumer Business) completed the sale of its Scientific Anglers and Ross Reels businesses to The Orvis Company, Inc. based in Manchester, Vermont. This transaction was not considered material

The aggregate operating income of these businesses included in the Company’s operating results for the periods presented and the amounts of major assets and liabilities of any associated disposal groups classified as held-for-sale as of December 31, 2015 were not material.

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Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets

Goodwill and Intangible Assets

NOTE 3.  Goodwill and Intangible Assets

Purchased goodwill from acquisitions totaled $2.5 billion in 2015, $636 million of which is deductible for tax purposes. Purchased goodwill from acquisitions totaled $65 million in 2014, none of which is deductible for tax purposes. The amounts in the “Translation and other” column in the following table primarily relate to changes in foreign currency exchange rates. The goodwill balance by business segment follows:

Goodwill

	Dec. 31,		2014		2014		Dec. 31,		2015		2015		Dec. 31,
	2013		acquisition		translation		2014		acquisition		translation		2015
(Millions)	Balance		activity		and other		Balance		activity		and other		Balance
Industrial	$	2,166	$	—	$	(129)	$	2,037	$	637	$	(106)	$	2,568
Safety and Graphics		1,740		—		(90)		1,650		1,764		(72)		3,342
Health Care		1,596		65		(72)		1,589		94		(59)		1,624
Electronics and Energy		1,612		—		(53)		1,559		—		(44)		1,515
Consumer		231		—		(16)		215		—		(15)		200
Total Company	$	7,345	$	65	$	(360)	$	7,050	$	2,495	$	(296)	$	9,249

As described in Note 16, effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions. For any product moves that resulted in reporting unit changes, the Company applied the relative fair value method to determine the impact on goodwill of the associated reporting units. During the third quarter of 2015, the Company completed its assessment of any potential goodwill impairment for reporting units impacted by this new structure and determined that no impairment existed. The Company also completed its annual goodwill impairment test in the fourth quarter of 2015 for all reporting units and determined that no impairment existed. In addition, the Company had no impairments of goodwill in prior years.

Acquired Intangible Assets

For 2015, the intangible assets (excluding goodwill) acquired through business combinations increased the gross carrying amount. Balances are also impacted by changes in foreign currency exchange rates.The gross carrying amount and accumulated amortization of acquired intangible assets as of December 31, follow:

(Millions)	2015		2014
Customer related intangible assets	$	1,973	$	1,348
Patents		616		581
Other technology-based intangible assets		525		407
Definite-lived tradenames		421		401
Other amortizable intangible assets		216		221
Total gross carrying amount	$	3,751	$	2,958
Accumulated amortization — customer related		(668)		(597)
Accumulated amortization — patents		(481)		(472)
Accumulated amortization — other technology based		(252)		(215)
Accumulated amortization — definite-lived tradenames		(215)		(195)
Accumulated amortization — other		(169)		(167)
Total accumulated amortization	$	(1,785)	$	(1,646)
Total finite-lived intangible assets — net	$	1,966	$	1,312
Non-amortizable intangible assets (primarily tradenames)		635		123
Total intangible assets — net	$	2,601	$	1,435

Certain tradenames acquired by 3M are not amortized because they have been in existence for over 55 years, have a history of leading-market share positions, have been and are intended to be continuously renewed, and the associated products of which are expected to generate cash flows for 3M for an indefinite period of time.

Amortization expense for the years ended December 31 follows:

(Millions)	2015		2014		2013
Amortization expense	$	229	$	228	$	236

Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2015 follows:

											After
(Millions)	2016		2017		2018		2019		2020		2020
Amortization expense	$	252	$	226	$	205	$	192	$	183	$	908

The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, changes in foreign currency exchange rates, impairment of intangible assets, accelerated amortization of intangible assets and other events. 3M expenses the costs incurred to renew or extend the term of intangible assets.

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Restructuring Actions

12 Months Ended

Dec. 31, 2015

Restructuring and Related Activities [Abstract]

Restructuring Actions

NOTE 4.  Restructuring Actions

2015 Restructuring Actions:

During the fourth quarter of 2015, management approved and committed to undertake certain restructuring actions primarily focused on structural overhead, largely in the U.S. and slower-growing markets, with particular emphasis on Europe, Middle East, and Africa (EMEA) and Latin America. This impacted approximately 1,700 positions worldwide and resulted in a fourth-quarter 2015 pre-tax charge of $114 million.

Components of these restructuring charges are summarized by business segment as follows:

	Year ended December 31, 2015
(Millions)	Employee-Related		Asset-Related		Total
Industrial	$	30	$	12	$	42
Safety and Graphics		11		—		11
Health Care		9		—		9
Electronics and Energy		8		4		12
Consumer		3		—		3
Corporate and Unallocated		37		—		37
Total Expense	$	98	$	16	$	114

The preceding restructuring charges were recorded in the income statement as follows:

(Millions)	2015
Cost of sales		40
Selling, general and administrative expenses		62
Research, development and related expenses		12
Total	$	114

Components of these restructuring actions, including cash and non-cash impacts, follow:

	Year ended December 31, 2015
(Millions)	Employee-Related		Asset-Related		Total
Expense incurred	$	98	$	16	$	114
Non-cash changes		(8)		(16)		(24)
Cash payments		(27)		—		(27)
Accrued 2015 restructuring action balances as of December 31, 2015	$	63	$	—	$	63

Non-cash changes include certain pension settlements and special termination benefits recorded in accrued pension and postretirement benefits and accelerated deprecation resulting from the cessation of use of certain long-lived assets. Remaining activities related to the restructuring are expected to be completed in 2016.

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Supplemental Balance Sheet Information

12 Months Ended

Dec. 31, 2015

Supplemental Balance Sheet Information

Supplemental Balance Sheet Information

NOTE 5.  Supplemental Balance Sheet Information

Accounts payable (included as a separate line item in the Consolidated Balance Sheet) includes drafts payable on demand of $79 million at December 31, 2015, and $1 million at December 31, 2014. Accumulated depreciation for capital leases totaled $98 million and $87 million as of December 31, 2015, and 2014, respectively. Additional supplemental balance sheet information is provided in the table that follows.

(Millions)	2015		2014
Other current assets
Prepaid expenses and other	$	1,081	$	764
Derivative assets-current		211		182
Insurance related receivables, prepaid expenses and other		106		77
Total other current assets	$	1,398	$	1,023
Investments
Equity method	$	56	$	58
Cost method		59		41
Other investments		2		3
Total investments	$	117	$	102
Property, plant and equipment - at cost
Land	$	354	$	368
Buildings and leasehold improvements		7,120		6,943
Machinery and equipment		14,743		14,684
Construction in progress		723		679
Capital leases		158		167
Gross property, plant and equipment		23,098		22,841
Accumulated depreciation		(14,583)		(14,352)
Property, plant and equipment - net	$	8,515	$	8,489
Other assets
Deferred income taxes	$	510	$	1,130
Insurance related receivables and other		49		89
Cash surrender value of life insurance policies		241		245
Other		253		305
Total other assets	$	1,053	$	1,769
Other current liabilities
Accrued trade payables	$	566	$	533
Deferred income		518		541
Derivative liabilities		65		39
Dividends payable		—		648
Employee benefits and withholdings		148		172
Contingent liability claims and other		147		157
Property and other taxes		89		90
Pension and postretirement benefits		60		60
Other		811		644
Total other current liabilities	$	2,404	$	2,884
Other liabilities
Long term income taxes payable	$	154	$	519
Employee benefits		254		262
Contingent liability claims and other		295		300
Capital lease obligations		46		59
Deferred income		19		21
Deferred income taxes		551		141
Other		261		253
Total other liabilities	$	1,580	$	1,555

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Supplemental Equity and Comprehensive Income Information

12 Months Ended

Dec. 31, 2015

Supplemental Equity and Comprehensive Income Information

Supplemental Equity and Comprehensive Income Information

NOTE 6.  Supplemental Equity and Comprehensive Income Information

Common stock ($.01 par value per share) of 3.0 billion shares is authorized, with 944,033,056 shares issued. Treasury stock is reported at cost, with 334,702,932 shares at December 31, 2015,  308,898,462 shares at December 31, 2014, and 280,736,817 shares at December 31, 2013. Preferred stock, without par value, of 10 million shares is authorized but unissued.

In 2015, 3M’s Board of Directors declared a second, third, and fourth quarter dividend of $1.025 per share, which resulted in total year 2015 declared dividends of $3.075 per share. In December 2014, 3M’s Board of Directors declared a first-quarter 2015 dividend of $1.025 per share (paid in March 2015), which when added to second, third and fourth quarter 2014 declared dividends of $0.855 per share, resulted in total year 2014 declared dividends of $3.59 per share. In December 2013, 3M’s Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (paid in March 2014). This resulted in total year 2013 declared dividends of $3.395 per share.

Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M by Component

			Defined Benefit		Debt and		Cash Flow		Accumulated
			Pension and		Equity		Hedging		Other
	Cumulative		Postretirement		Securities,		Instruments,		Comprehensive
	Translation		Plans		Unrealized		Unrealized		Income
(Millions)	Adjustment		Adjustment		Gain (Loss)		Gain (Loss)		(Loss)
Balance at December 31, 2012, net of tax:	$	230	$	(4,955)	$	(2)	$	(23)	$	(4,750)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(462)		1,361		—		(98)		801
Amounts reclassified out		—		569		—		122		691
Total other comprehensive income (loss), before tax		(462)		1,930		—		24		1,492
Tax effect		44		(690)		—		(9)		(655)
Total other comprehensive income (loss), net of tax		(418)		1,240		—		15		837
Balance at December 31, 2013, net of tax:	$	(188)	$	(3,715)	$	(2)	$	(8)	$	(3,913)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(856)		(2,638)		2		171		(3,321)
Amounts reclassified out		—		360		1		(4)		357
Total other comprehensive income (loss), before tax		(856)		(2,278)		3		167		(2,964)
Tax effect		(92)		716		(1)		(60)		563
Total other comprehensive income (loss), net of tax		(948)		(1,562)		2		107		(2,401)
Impact from purchase of subsidiary shares		41		(16)		—		—		25
Balance at December 31, 2014, net of tax	$	(1,095)	$	(5,293)	$	—	$	99	$	(6,289)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(447)		367		—		212		132
Amounts reclassified out		—		537		—		(174)		363
Total other comprehensive income (loss), before tax		(447)		904		—		38		495
Tax effect		(137)		(415)		—		(13)		(565)
Total other comprehensive income (loss), net of tax		(584)		489		—		25		(70)
Balance at December 31, 2015, net of tax:	$	(1,679)	$	(4,804)	$	—	$	124	$	(6,359)

Income taxes are not provided for foreign translation relating to permanent investments in international subsidiaries, but tax effects within cumulative translation does include impacts from items such as net investment hedge transactions. Reclassification adjustments are made to avoid double counting in comprehensive income items that are also recorded as part of net income.

Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M

	Amounts Reclassified from
	Accumulated Other Comprehensive Income
(Millions)	Year ended		Year ended		Year ended
Details about Accumulated Other	December 31,		December 31,		December 31,		Location on Income
Comprehensive Income Components	2015		2014		2013		Statement
Gains (losses) associated with, defined benefit pension and postretirement plans amortization
Transition asset	$	1	$	1	$	1	See Note 11
Prior service benefit		79		59		77	See Note 11
Net actuarial loss		(626)		(420)		(647)	See Note 11
Curtailments/Settlements		9		—		—	See Note 11
Total before tax		(537)		(360)		(569)
Tax effect		176		122		197	Provision for income taxes
Net of tax	$	(361)	$	(238)	$	(372)
Debt and equity security gains (losses)
Sales or impairments of securities	$	—	$	(1)	$	—	Selling, general and administrative expenses
Total before tax		—		(1)		—
Tax effect		—		—		—	Provision for income taxes
Net of tax	$	—	$	(1)	$	—
Cash flow hedging instruments gains (losses)
Foreign currency forward/option contracts	$	178	$	3	$	(11)	Cost of sales
Foreign currency forward contracts		—		—		(108)	Interest expense
Commodity price swap contracts		(2)		2		(2)	Cost of sales
Interest rate swap contracts		(2)		(1)		(1)	Interest expense
Total before tax		174		4		(122)
Tax effect		(63)		(1)		45	Provision for income taxes
Net of tax	$	111	$	3	$	(77)
Total reclassifications for the period, net of tax	$	(250)	$	(236)	$	(449)

Purchase and Sale of Subsidiary Shares

On September 1, 2014, 3M (via Sumitomo 3M Limited) purchased Sumitomo Electric Industries, Ltd.’s 25 percent interest in 3M’s consolidated Sumitomo 3M Limited subsidiary for 90 billion Japanese Yen. Upon completion of the transaction, 3M owned 100 percent of Sumitomo 3M Limited. This transaction was recorded as a financing activity (Purchase of noncontrolling interest) in the statement of cash flows.

In April 2014, 3M purchased the remaining noncontrolling interest in a consolidated 3M subsidiary for an immaterial amount, which was classified as a financing activity (Purchase of noncontrolling interest) in the consolidated statement of cash flows.

The following table summarizes the effects of these 2014 transactions on equity attributable to 3M Company shareholders:

	Year ended
(Millions)	December 31, 2014
Net income attributable to 3M	$	4,956
Impact of purchase of subsidiary shares		(409)
Change in 3M Company shareholders’ equity from net income
attributable to 3M and impact of purchase of subsidiary shares	$	4,547

In March 2013, 3M sold shares in 3M India Limited, a subsidiary of the Company, in return for $8 million. The noncontrolling interest shares of this subsidiary trade on a public exchange in India. This sale of shares complied with an amendment to Indian securities regulations that required 3M India Limited, as a listed company, to achieve a minimum public shareholding of at least 25 percent. As a result of this transaction, 3M’s ownership in 3M India Limited was reduced from 76 percent to 75 percent. The $8 million received in the first quarter of 2013 was classified as other financing activity in the consolidated statement of cash flows. Because the Company retained its controlling interest, the sale resulted in an increase in 3M Company shareholder’s equity of $7 million and an increase in noncontrolling interest of $1 million.

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Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements

Supplemental Cash Flow Information

NOTE 7.  Supplemental Cash Flow Information

(Millions)	2015		2014		2013
Cash income tax payments, net of refunds	$	2,331	$	1,968	$	1,803
Cash interest payments		134		178		169
Capitalized interest		13		15		21

Cash interest payments include interest paid on debt and capital lease balances, including net interest payments/receipts related to accreted debt discounts/premiums, payment of debt issue costs, as well as net interest payments/receipts associated with interest rate swap contracts.

Individual amounts in the Consolidated Statement of Cash Flows exclude the impacts of acquisitions, divestitures and exchange rate impacts, which are presented separately.

Transactions related to investing and financing activities with significant non-cash components are as follows:

· During the fourth quarter of 2014, 3M sold and leased-back, under a capital lease, certain recently constructed machinery and equipment in return for a municipal bond with the City of Nevada, Missouri valued at approximately $15 million as of the transaction date.

· During the third quarter of 2013, 3M sold its equity interest in a non-strategic investment in exchange for a note receivable of approximately $24 million, which is considered non-cash investing activity. As a result of this transaction, in the third quarter of 2013, 3M recorded a pre-tax gain of $18 million in its Health Care business segment. In October 2013, cash was received for the note receivable and is reflected in other investing activity in the consolidated statement of cash flows for the year ended December 31, 2013.

· During the second quarter of 2013, the Company’s Sumitomo 3M Limited subsidiary moved its administrative headquarters to a new leased location and sold the former site under an installment sale arrangement. As a result, at the time of the closing of the sale transaction, the Company received certain cash proceeds (included in proceeds from sale of property, plant and equipment in the consolidated statement of cash flows) and recorded a note receivable (due in quarterly installments through the first quarter of 2016) of $78 million and deferred profit of $49 million (both based on the foreign currency exchange rate at the time of closing). Remaining quarterly installments are due through the first quarter of 2016 and will be included in other investing activities in the consolidated statement of cash flows. Deferred profit is reduced and recognized into income in connection with such quarterly installments.

In addition, as discussed in Note 6, in the fourth quarter of 2014, 3M’s Board of Directors declared a first-quarter 2015 dividend of $1.025 per share (paid in March 2015), which reduced 3M’s stockholders equity and increased other current liabilities as of December 2014 by $648 million. In the fourth quarter of 2013, 3M’s Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (paid in March 2014). This reduced 3M’s stockholders equity and increased other current liabilities as of December 31, 2013 by $567 million.

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Income Taxes

12 Months Ended

Dec. 31, 2015

Income Taxes

Income Taxes

NOTE 8.  Income Taxes

Income Before Income Taxes

(Millions)	2015		2014		2013
United States	$	4,399	$	3,815	$	3,194
International		2,424		3,211		3,368
Total	$	6,823	$	7,026	$	6,562

Provision for Income Taxes

(Millions)	2015		2014		2013
Currently payable
Federal	$	1,338	$	1,103	$	948
State		101		108		91
International		566		1,008		901
Deferred
Federal		(55)		(171)		(123)
State		6		(9)		(2)
International		26		(11)		26
Total	$	1,982	$	2,028	$	1,841

Components of Deferred Tax Assets and Liabilities

(Millions)	2015		2014
Deferred tax assets:
Accruals not currently deductible
Employee benefit costs	$	175	$	148
Product and other claims		146		152
Miscellaneous accruals		114		137
Pension costs		1,120		1,312
Stock-based compensation		305		290
Net operating/capital loss carryforwards		109		175
Foreign tax credits		25		360
Inventory		46		52
Other		—		30
Gross deferred tax assets		2,040		2,656
Valuation allowance		(31)		(22)
Total deferred tax assets	$	2,009	$	2,634
Deferred tax liabilities:
Product and other insurance receivables	$	(28)	$	(31)
Accelerated depreciation		(736)		(804)
Intangible amortization		(1,017)		(719)
Currency translation		(199)		(91)
Other		(70)		—
Total deferred tax liabilities	$	(2,050)	$	(1,645)
Net deferred tax assets (liabilities)	$	(41)	$	989

The net deferred tax assets are included as components of Other Assets and Other Liabilities within the Consolidated Balance Sheet. See Note 5 “Supplemental Balance Sheet Information” for further details.

As of December 31, 2015, the Company had tax effected operating losses, capital losses, and tax credit carryovers for federal (approximately $31 million), state (approximately $2 million), and international (approximately $76 million), with all amounts before valuation allowances. The federal tax attribute carryovers will expire after 15 to 20 years, the state after five to 10 years, and the majority of international after four years with the remaining international expiring in one year or with an indefinite carryover period. The tax attributes being carried over arise as certain jurisdictions may have tax losses or may have inabilities to utilize certain losses without the same type of taxable income. As of December 31, 2015, the Company has provided $31 million of valuation allowance against certain of these deferred tax assets based on management’s determination that it is more-likely-than-not that the tax benefits related to these assets will not be realized.

Reconciliation of Effective Income Tax Rate

	2015		2014		2013
Statutory U.S. tax rate	35.0	%	35.0	%	35.0	%
State income taxes - net of federal benefit	1.1		0.9		0.9
International income taxes - net	(3.8)		(5.8)		(6.3)
U.S. research and development credit	(0.5)		(0.4)		(0.7)
Reserves for tax contingencies	(1.0)		0.6		1.2
Domestic Manufacturer’s deduction	(1.8)		(1.3)		(1.6)
All other - net	0.1		(0.1)		(0.4)
Effective worldwide tax rate	29.1	%	28.9	%	28.1	%

The effective tax rate for 2015 was 29.1 percent, compared to 28.9 percent in 2014, an increase of 0.2 percentage points, impacted by several factors. Factors which increased the Company’s effective tax rate included international taxes, which were impacted by changes in foreign currency rates and changes to the geographic mix of income before taxes, and other items. Combined, these factors increased the Company’s effective tax rate by 2.4 percentage points. This increase was partially offset by a 2.2 percentage point decrease, which related to the remeasurements of 3M’s uncertain tax positions, including the restoration of tax basis on certain assets for which depreciation deductions were previously limited, and increases in the domestic manufacturer’s deduction and U.S. research and development credit benefits.

The effective tax rate for 2014 was 28.9 percent, compared to 28.1 percent in 2013, an increase of 0.8 percentage points, impacted by many factors. Factors which increased the Company’s effective tax rate included a one-time international tax impact related to the establishment of the supply chain center of expertise in Europe, decreased U.S. research and development credit in 2014 compared to 2013 due to two years inclusion as a result of the reinstatement in 2013, decreased domestic manufacturer’s deduction, and other items. Combined, these factors increased the Company’s effective tax rate by 1.6percentage points. This increase was partially offset by a 0.8 percentage point decrease, which related to both lower 3M income tax reserves for 2014 when compared to 2013 and international taxes as a result of changes to the geographic mix of income before taxes.

The Company files income tax returns in the U.S. federal jurisdiction, and various states and foreign jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2005.

The IRS has completed its field examination of the Company’s U.S. federal income tax returns for the years 2005 through 2013. The Company protested certain IRS positions within these tax years and entered into the administrative appeals process with the IRS. In December 2012, the Company received a statutory notice of deficiency for the 2006 year. The Company filed a petition in Tax Court in the first quarter of 2013 relating to the 2006 tax year. Currently, the Company is under examination by the IRS for its U.S. federal income tax returns for the years 2014 and 2015. It is anticipated that the IRS will complete its examination of the Company for 2014 by the end of the first quarter of 2016 and for 2015 by the end of the first quarter of 2017. As of December 31, 2015, the IRS has not proposed any significant adjustments to the Company’s tax positions for which the Company is not adequately reserved.

Payments relating to other proposed assessments arising from the 2005 through 2015 examinations may not be made until a final agreement is reached between the Company and the IRS on such assessments or upon a final resolution resulting from the administrative appeals process or judicial action. In addition to the U.S. federal examination, there is also audit activity in several U.S. state and foreign jurisdictions.

3M anticipates changes to the Company’s uncertain tax positions due to the closing and resolution of audit issues for various audit years mentioned above and closure of statutes. The Company is not currently able to reasonably estimate the amount by which the liability for unrecognized tax benefits will increase or decrease during the next 12 months as a result of the ongoing income tax authority examinations.

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (UTB) is as follows:

Federal, State and Foreign Tax

(Millions)	2015		2014		2013
Gross UTB Balance at January 1	$	583	$	659	$	528
Additions based on tax positions related to the current year		77		201		97
Additions for tax positions of prior years		140		30		158
Reductions for tax positions of prior years		(399)		(74)		(29)
Settlements		(4)		(154)		(17)
Reductions due to lapse of applicable statute of limitations		(16)		(79)		(78)
Gross UTB Balance at December 31	$	381	$	583	$	659
Net UTB impacting the effective tax rate at December 31	$	369	$	265	$	262

The total amount of UTB, if recognized, would affect the effective tax rate by $369 million as of December 31, 2015,  $265 million as of December 31, 2014, and $262 million as of December 31, 2013. The ending net UTB results from adjusting the gross balance for items such as Federal, State, and non-U.S. deferred items, interest and penalties, and deductible taxes. The net UTB is included as components of Other Assets, Accrued Income Taxes, and Other Liabilities within the Consolidated Balance Sheet.

The Company recognizes interest and penalties accrued related to unrecognized tax benefits in tax expense. The Company recognized in the consolidated statement of income on a gross basis approximately $2 million of expense, $14 million of benefit, and $22 million of expense in 2015,  2014, and 2013, respectively. The amount of interest and penalties recognized may be an expense or benefit due to new or remeasured unrecognized tax benefit accruals. At December 31, 2015, and December 31, 2014, accrued interest and penalties in the consolidated balance sheet on a gross basis were $45 million and $44 million, respectively. Included in these interest and penalty amounts are interest and penalties related to tax positions for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility. Because of the impact of deferred tax accounting, other than interest and penalties, the disallowance of the shorter deductibility period would not affect the annual effective tax rate but would accelerate the payment of cash to the taxing authority to an earlier period.

As a result of certain employment commitments and capital investments made by 3M, income from certain manufacturing activities in the following countries is subject to reduced tax rates or, in some cases, is exempt from tax for years through the following: Taiwan (2015), China (2016), Korea (2018), Brazil (2023), Switzerland (2024), and Singapore (2025). The income tax benefits attributable to the tax status of these subsidiaries are estimated to be $114 million (18 cents per diluted share) in 2015,  $99 million (15 cents per diluted share) in 2014, and $87 million (13 cents per diluted share) in 2013.

The Company has not provided deferred taxes on unremitted earnings attributable to international companies that have been considered to be reinvested indefinitely, with the exception of an acquired entity. These earnings relate to ongoing operations and were approximately $12 billion as of December 31, 2015. Because of the availability of U.S. foreign tax credits, the multiple avenues in which to repatriate the earnings to minimize tax cost, and because a large portion of these earnings are not liquid, it is not practical to determine the income tax liability that would be payable if such earnings were not reinvested indefinitely.

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Marketable Securities

12 Months Ended

Dec. 31, 2015

Marketable Securities

Marketable Securities

NOTE 9.  Marketable Securities

The Company invests in agency securities, corporate securities, asset-backed securities and other securities. The following is a summary of amounts recorded on the Consolidated Balance Sheet for marketable securities (current and non-current).

	December 31,		December 31,
(Millions)	2015		2014
U.S. government agency securities	$	—	$	108
Foreign government agency securities		10		95
Corporate debt securities		10		619
Commercial paper		12		—
Certificates of deposit/time deposits		26		41
U.S. treasury securities		—		38
U.S. municipal securities		3		—
Asset-backed securities:
Automobile loan related		26		282
Credit card related		10		162
Equipment lease related		2		48
Other		19		46
Asset-backed securities total		57		538
Current marketable securities	$	118	$	1,439
U.S. municipal securities	$	9	$	15
Non-current marketable securities	$	9	$	15
Total marketable securities	$	127	$	1,454

Classification of marketable securities as current or non-current is based on the nature of the securities and availability for use in current operations. At December 31, 2015 and 2014, gross unrealized gains and/or losses (pre-tax) were not material. Refer to Note 6 for a table that provides the net realized gains (losses) related to sales or impairments of debt and equity securities, which includes marketable securities. The gross amounts of the realized gains or losses were not material. Cost of securities sold use the first in, first out (FIFO) method. Since these marketable securities are classified as available-for-sale securities, changes in fair value will flow through other comprehensive income, with amounts reclassified out of other comprehensive income into earnings upon sale or “other-than-temporary” impairment.

3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders’ equity. Such an unrealized loss does not reduce net income attributable to 3M for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.

The balance at December 31, 2015, for marketable securities by contractual maturity are shown below. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.

(Millions)	December 31, 2015
Due in one year or less	$	52
Due after one year through five years		74
Due after five years through ten years		1
Due after ten years		—
Total marketable securities	$	127

3M has a diversified marketable securities portfolio of $127 million as of December 31, 2015. Within this portfolio, current asset-backed securities (estimated fair value of $57 million) primarily include interests in automobile loans, credit cards and equipment leases. 3M’s investment policy allows investments in asset-backed securities with minimum credit ratings of Aa2 by Moody’s Investors Service or AA by Standard & Poor’s or Fitch Ratings or DBRS. Asset-backed securities must be rated by at least two of the aforementioned rating agencies, one of which must be Moody’s Investors Service or Standard & Poor’s. At December 31, 2015, all asset-backed security investments were in compliance with this policy. Approximately 75.8 percent of all asset-backed security investments were rated AAA or A-1+ by Standard & Poor’s and/or Aaa or P-1 by Moody’s Investors Service and/or AAA or F1+ by Fitch Ratings. Interest rate risk and credit risk related to the underlying collateral may impact the value of investments in asset-backed securities, while factors such as general conditions in the overall credit market and the nature of the underlying collateral may affect the liquidity of investments in asset-backed securities. 3M does not currently expect risk related to its holding in asset-backed securities to materially impact its financial condition or liquidity.

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Long-Term Debt and Short-Term Borrowings

12 Months Ended

Dec. 31, 2015

Long-Term Debt and Short-Term Borrowings

Long-Term Debt and Short-Term Borrowings

NOTE 10.  Long-Term Debt and Short-Term Borrowings

The following debt tables reflect effective interest rates, which include the impact of interest rate swaps, as of December 31, 2015. If the debt was issued on a combined basis, the debt has been separated to show the impact of the fixed versus floating effective interest rates. Carrying value includes the impact of debt issuance costs and fair value hedging activity. Long-term debt and short-term borrowings as of December 31 consisted of the following:

Long-Term Debt

	Currency/	Effective		Final
(Millions)	Fixed vs.	Interest		Maturity	Carrying Value
Description / 2015 Principal Amount	Floating	Rate		Date	2015		2014
Medium-term note ($1 billion)	USD Fixed	1.62	%	2016	$	999	$	996
Medium-term note ($650 million)	USD Fixed	1.10	%	2017		648		647
Medium-term note (500 million Euros)	Euro Floating	0.16	%	2018		545		606
Medium-term note ($450 million)	USD Floating	0.44	%	2018		448		—
Medium-term note ($600 million)	USD Floating	0.55	%	2019		597		592
Medium-term note ($25 million)	USD Fixed	1.74	%	2019		25		25
Medium-term note (650 million Euros)	Euro Floating	0.15	%	2020		708		—
Medium-term note ($300 million)	USD Floating	0.61	%	2020		297		—
Medium-term note ($200 million)	USD Fixed	2.12	%	2020		198		—
Eurobond (300 million Euros)	Euro Floating	0.21	%	2021		348		389
Eurobond (300 million Euros)	Euro Fixed	1.97	%	2021		326		361
Medium-term note ($600 million)	USD Fixed	2.17	%	2022		592		591
Medium-term note (600 million Euros)	Euro Fixed	1.14	%	2023		644		—
Medium-term note ($550 million)	USD Fixed	3.04	%	2025		545		—
Medium-term note (750 million Euros)	Euro Fixed	1.71	%	2026		801		892
30-year debenture ($330 million)	USD Fixed	6.01	%	2028		343		344
Medium-term note (500 million Euros)	Euro Fixed	1.90	%	2030		533		—
30-year bond ($750 million)	USD Fixed	5.73	%	2037		743		742
Floating rate note ($96 million)	USD Floating	0.22	%	2041		96		96
Medium-term note ($325 million)	USD Fixed	4.05	%	2044		313		312
Floating rate note ($55 million)	USD Floating	0.16	%	2044		55		55
Other borrowings	Various	0.22	%	2016-2040		74		112
Total long-term debt					$	9,878	$	6,760
Less: current portion of long-term debt						1,125		55
Long-term debt (excluding current portion)					$	8,753	$	6,705

Post-Swap Borrowing (Long-Term Debt, Including Current Portion)

	2015				2014
	Carrying		Effective		Carrying		Effective
(Millions)	Value		Interest Rate		Value		Interest Rate
Fixed-rate debt	$	6,712	2.54	%	$	4,911	2.74	%
Floating-rate debt		3,166	0.32	%		1,849	0.53	%
Total long-term debt, including current portion	$	9,878			$	6,760

Short-Term Borrowings and Current Portion of Long-Term Debt

	Effective		Carrying Value
(Millions)	Interest Rate		2015		2014
Current portion of long-term debt	1.45	%	$	1,125	$	55
U.S. dollar commercial paper	—	%		—		—
Other borrowings	1.01	%		919		51
Total short-term borrowings and current portion of long-term debt			$	2,044	$	106

In 2015, other short-term borrowings primarily consisted of bank borrowings by international subsidiaries, primarily Japan and Korea.

Maturities of Long-term Debt

Maturities of long-term debt for the five years subsequent of December 31, 2015 are as follows (in millions):

										After
2016		2017		2018		2019		2020		2020		Total
$	1,125	$	744	$	993	$	622	$	1,203	$	5,191	$	9,878

Long-term debt payments due in 2016 and 2017 include floating rate notes totaling $126 million (classified as current portion of long-term debt), and $96 million (included as a separate floating rate note in the long-term debt table), respectively, as a result of put provisions associated with these debt instruments.

Credit Facilities

In August 2014, 3M amended and extended its existing $1.5 billion five-year revolving credit facility to a $2.25 billion five-year agreement expiring in August 2019. This credit agreement includes a provision under which 3M may request an increase of up to $2.25 billion, bringing the total facility up to $4.5 billion (at the lender’s discretion). This facility was undrawn at December 31, 2015. Under the $2.25 billion credit agreement, the Company is required to maintain its EBITDA to Interest Ratio as of the end of each fiscal quarter at not less than 3.0 to 1. This is calculated (as defined in the agreement) as the ratio of consolidated total EBITDA for the four consecutive quarters then ended to total interest expense on all funded debt for the same period. At December 31, 2015, this ratio was approximately 56 to 1. Debt covenants do not restrict the payment of dividends.

Other Credit Facilities

Apart from the committed revolving facility, an additional $241 million in stand-alone letters of credit and $18 million in bank guarantees were also issued and outstanding at December 31, 2015. These lines of credit are utilized in connection with normal business activities.

Long-Term Debt Issuances

The principal amounts, interest rates and maturity dates of individual long-term debt issuances can be found in the long-term debt table found at the beginning of this note.

In May 2015, 3M issued 1.750 billion Euros aggregate principal amount of medium term notes. In August 2015, 3M issued $1.500 billion aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into two interest rate swaps as fair value hedges of a portion of the fixed interest rate medium-term note obligation. The first converted a $450 million three-year fixed rate note, and the second converted $300 million of a five-year fixed rate note included in this issuance to an interest rate based on a floating three-month LIBOR index.

In June 2014, 3M issued $950 million aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into an interest rate swap to convert $600 million of a $625 million note included in this issuance to an interest rate based on a floating three-month LIBOR index as a fair value hedge of a portion of the fixed interest rate medium-term note obligation. In November 2014, the Company issued 1.250 billion Euros aggregate principal amount of medium-term notes.

In November 2013, 3M issued a Eurobond for an amount of 600 million Euros. Upon debt issuance, 3M completed a fixed-to-floating interest rate swap on a notional amount of 300 million Euros.

Long-Term Debt Maturities

In July 2014, 3M retired at maturity 1.025 billion Euros of seven-year 5.0% fixed rate Eurobonds. In December 2012, 3M entered into a three-year 66 million British Pound (approximately $106 million based on agreement date exchange rates) committed credit facility agreement with JP Morgan Chase Bank, which was fully drawn as of December 31, 2012. 3M repaid the balance in 2014.

In August 2013, 3M repaid $850 million (principal amount) of medium-term notes.

Floating Rate Notes

At various times, 3M has issued floating rate notes containing put provisions. 3M would be required to repurchase these securities at various prices ranging from 99 percent to 100 percent of par value according to the reduction schedules for each security. In December 2004, 3M issued a forty-year $60 million floating rate note, with a rate based on a floating LIBOR index. Under the terms of this floating rate note due in 2044, holders have an annual put feature at 100 percent of par value from 2014 and every anniversary thereafter until final maturity. Under the terms of the floating rate notes due in 2027, 2040 and 2041, holders have put options that commence ten years from the date of issuance and each third anniversary thereafter until final maturity at prices ranging from 99 percent to 100 percent of par value. In 2008 through 2015, 3M was required to repurchase an immaterial amount of principal on the aforementioned floating rate notes.

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Pension and Postretirement Benefit Plans

12 Months Ended

Dec. 31, 2015

Pension and Postretirement Benefit Plans

Pension and Postretirement Benefit Plans

NOTE 11.  Pension and Postretirement Benefit Plans

3M has company-sponsored retirement plans covering substantially all U.S. employees and many employees outside the United States. In total, 3M has over 80 defined benefit plans in 28 countries. Pension benefits associated with these plans generally are based on each participant’s years of service, compensation, and age at retirement or termination. The primary U.S. defined-benefit pension plan was closed to new participants effective January 1, 2009. The Company also provides certain postretirement health care and life insurance benefits for substantially all of its U.S. employees who reach retirement age while employed by the Company. Most international employees and retirees are covered by government health care programs. The cost of company-provided postretirement health care plans for international employees is not material and is combined with U.S. amounts in the tables that follow.

The Company also sponsors employee savings plans under Section 401(k) of the Internal Revenue Code. These plans are offered to substantially all regular U.S. employees. For eligible employees hired prior to January 1, 2009, employee 401(k) contributions of up to 6% of eligible compensation were matched in cash at rates of 60% or 75%, depending on the plan in which the employee participates. Employees hired on or after January 1, 2009, received a cash match of 100% for employee 401(k) contributions of up to 6% of eligible compensation and also received an employer retirement income account cash contribution of 3% of the participant’s total eligible compensation. Beginning on January 1, 2016, for U.S. employees, the Company reduced its match on employee 401(k) contributions. For eligible employees hired prior to January 1, 2009, employee 401(k) contributions of up to 5% of eligible compensation will be matched in cash at rates of 45% or 60%, depending on the plan in which the employee participates. Employees hired on or after January 1, 2009, will receive a cash match of 100% for employee 401(k) contributions of up to 5% of eligible compensation and will also continue to receive an employer retirement income account cash contribution of 3% of the participant’s total eligible compensation. All contributions are invested in a number of investment funds pursuant to the employees’ elections. Employer contributions to the U.S. defined contribution plans were $165 million, $153 million and $136 million for 2015,  2014 and 2013, respectively. 3M subsidiaries in various international countries also participate in defined contribution plans. Employer contributions to the international defined contribution plans were $77 million, $75 million and $71 million for 2015,  2014 and 2013, respectively.

The Company has made deposits for its defined benefit plans with independent trustees. Trust funds and deposits with insurance companies are maintained to provide pension benefits to plan participants and their beneficiaries. There are no plan assets in the non-qualified plan due to its nature. For its U.S. postretirement health care and life insurance benefit plans, the Company has set aside amounts at least equal to annual benefit payments with an independent trustee.

3M’s primary U.S. qualified defined benefit plan does not have a mandatory cash contribution because the Company has a significant credit balance from previous discretionary contributions that can be applied to any Pension Protection Act funding requirements.

As a result of changes made to its U.S. postretirement health care benefit plans in 2010, the Company has transitioned all current and future retirees to a savings account benefits-based plan. These changes became effective beginning January 1, 2013, for all Medicare eligible retirees and their Medicare eligible dependents and became effective beginning January 1, 2016, for all non-Medicare eligible retirees and their eligible dependents.In August 2015, 3M modified the 3M Retiree Welfare Benefit Plan postretirement medical benefit reducing the future benefit for participants not retired as of January 1, 2016. For participants retiring after January 1, 2016, the Retiree Medical Savings Account (RMSA) is no longer credited with interest and the indexation on both the RMSA and the Medicare Health Reimbursement Arrangement is reduced from 3 percent to 1.5 percent per year (for those employees who are eligible for these accounts). Also effective January 1, 2016, 3M no longer offers 3M Retiree Health Care Accounts to new hires. Due to these changes the plan was re-measured in the third quarter of 2015, resulting in a decrease to the projected benefit obligation liability of approximately $233 million, and a related increase to shareholders’ equity, specifically accumulated other comprehensive income.

In the third quarter of 2014, former U.S. employees who have a pension benefit for which they have not begun receiving payment (term vested) were offered a lump sum payout of their pension benefit. As a result of this action, the projected benefit obligation (PBO) liability was reduced in the fourth quarter of 2014 by approximately $270 million, with the actual cash payout of approximately the same amount paid from the plan’s assets in the fourth quarter of 2014. The PBO liability reduction was 34% of the term vested eligible PBO and a 2% reduction in the overall U.S. pension PBO liability based on the December 31, 2013, valuation. There was no pension expense impact as a result of this action on 3M’s consolidated statement of income in 2014.

In the fourth quarter of 2014, 3M’s Board of Directors approved an amendment of the U.S. defined benefit pension plan to include a lump sum payment option for employees that have vested retirement benefits who commence their pension January 1, 2015, or later. This option is also available to vested employees who leave 3M before becoming eligible to retire at the time of termination. This change reduced 3M’s year-end 2014 U.S.pension PBO liability by approximately $266 million.

As of December 31, 2014, the Company converted to the “RP 2014 Mortality Tables” and updated the mortality improvement scale it used for calculating the year-end 2014 U.S. defined benefit pension annuitant and postretirement obligations and 2015 expense. The impact of this change increased the year-end 2014 U.S. pension PBO by approximately $820 million and the U.S. accumulated postretirement benefit obligation by approximately $100 million.

In March 2015, 3M Japan modified the Japan Limited Defined Benefit Corporate Pension Plan (DBCPP). Beginning July 1, 2015, eligible employees receive a company provided contribution match of 6.12% of their eligible salary to their defined contribution plan. Employees no longer earn additional service towards their defined benefit pension plans after July 1, 2015, except for eligible salaries above the statutory defined contribution limits. As a result of this plan modification, the Company re-measured the DBCPP, which resulted in a $17 million pre-tax curtailment gain for the year ending December 31, 2015. In March2015, 3M also received a favorable Internal Revenue Service tax determination letterto terminate a frozen defined benefit pension plan of one of 3M’s acquired subsidiaries. By the end of 2015, thisplan made final distributions of$16 million to participants.The Company also had other settlements, curtailments, special termination benefits and other items in 2015 aggregating to the amounts indicated in these components in the applicable tables that follow.

3M was informed during the first quarter of 2009, that the general partners of WG Trading Company, in which 3M’s benefit plans hold limited partnership interests, are the subject of a criminal investigation as well as civil proceedings by the SEC and CFTC (Commodity Futures Trading Commission). In March 2011, over the objections of 3M and six other limited partners of WG Trading Company, the district court judge ruled in favor of the court appointed receiver’s proposed distribution plan (and in April 2013, the United States Court of Appeals for the Second Circuit affirmed the district court’s ruling). The benefit plan trustee holdings of WG Trading Company interests were adjusted to reflect the decreased estimated fair market value, inclusive of estimated insurance proceeds, as of the annual measurement dates. The Company has insurance that it believes, based on what is currently known, will result in the probable recovery of a portion of the decrease in original asset value. In the first quarter of 2014, 3M and certain 3M benefit plans filed a lawsuit in the U.S. District Court for the District of Minnesota against five insurers seeking insurance coverage for the WG Trading Company claim. In September 2015, the court ruled in favor of the defendant insurance companies on a motion for summary judgment and dismissed the lawsuit. In October 2015, 3M and the 3M benefit plans filed a notice of appeal to the United States Court of Appeals for the Eighth Circuit. As of the 2015 measurement date, these holdings represented less than one half of one percent of 3M’s fair value of total plan assets. 3M currently believes that the resolution of these events will not have a material adverse effect on the consolidated financial position of the Company.

The following tables include a reconciliation of the beginning and ending balances of the benefit obligation and the fair value of plan assets as well as a summary of the related amounts recognized in the Company’s consolidated balance sheet as of December 31 of the respective years. 3M also has certain non-qualified unfunded pension and postretirement benefit plans, inclusive of plans related to supplement/excess benefits for employees impacted by particular relocations and other matters, that individually and in the aggregate are not significant and which are not included in the tables that follow. The obligations for these plans are included within other liabilities in the Company’s consolidated balance sheet and aggregated less than $35 million as of December 31, 2015 and 2014.

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Change in benefit obligation
Benefit obligation at beginning of year	$	16,452	$	13,967	$	6,979	$	6,346	$	2,462	$	2,017
Acquisitions/Transfers in		—		—		94		—		—		—
Service cost		293		241		154		141		75		65
Interest cost		655		676		206		252		98		97
Participant contributions		—		—		9		10		14		18
Foreign exchange rate changes		—		—		(589)		(663)		(22)		(11)
Plan amendments		—		(266)		(6)		3		(211)		—
Actuarial (gain) loss		(657)		2,874		(274)		1,128		(80)		415
Medicare Part D Reimbursement		—		—		—		—		1		1
Benefit payments		(874)		(1,039)		(232)		(235)		(122)		(140)
Settlements, curtailments, special termination benefits and other		(13)		(1)		(19)		(3)		1		—
Benefit obligation at end of year	$	15,856	$	16,452	$	6,322	$	6,979	$	2,216	$	2,462
Change in plan assets
Fair value of plan assets at beginning of year	$	14,643	$	13,889	$	5,957	$	5,758	$	1,436	$	1,405
Acquisitions/Transfers in		—		—		8		—		—		—
Actual return on plan assets		100		1,749		287		813		36		148
Company contributions		113		45		151		165		3		5
Participant contributions		—		—		9		10		14		18
Foreign exchange rate changes		—		—		(498)		(554)		—		—
Benefit payments		(874)		(1,039)		(232)		(235)		(122)		(140)
Settlements, curtailments, special termination benefits and other		(16)		(1)		(13)		—		—		—
Fair value of plan assets at end of year	$	13,966	$	14,643	$	5,669	$	5,957	$	1,367	$	1,436
Funded status at end of year	$	(1,890)	$	(1,809)	$	(653)	$	(1,022)	$	(849)	$	(1,026)

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Amounts recognized in the Consolidated Balance Sheet as of Dec. 31,
Non-current assets	$	3	$	3	$	185	$	43	$	—	$	—
Accrued benefit cost
Current liabilities		(47)		(46)		(10)		(10)		(3)		(4)
Non-current liabilities		(1,846)		(1,766)		(828)		(1,055)		(846)		(1,022)
Ending balance	$	(1,890)	$	(1,809)	$	(653)	$	(1,022)	$	(849)	$	(1,026)

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Amounts recognized in accumulated other comprehensive income as of Dec. 31,
Net transition obligation (asset)	$	—	$	—	$	(2)	$	(3)	$	—	$	—
Net actuarial loss (gain)		5,366		5,462		1,610		2,200		815		914
Prior service cost (credit)		(227)		(251)		(68)		(93)		(270)		(102)
Ending balance	$	5,139	$	5,211	$	1,540	$	2,104	$	545	$	812

The balance of amounts recognized for international plans in accumulated other comprehensive income as of December 31 in the preceding table are presented based on the foreign currency exchange rate on that date.

The pension accumulated benefit obligation represents the actuarial present value of benefits based on employee service and compensation as of the measurement date and does not include an assumption about future compensation levels. The accumulated benefit obligation of the U.S. pension plans was $14.834 billion and $15.335 billion at December 31, 2015 and 2014, respectively. The accumulated benefit obligation of the international pension plans was $5.773 billion and $6.401 billion at December 31, 2015 and 2014, respectively.

The following amounts relate to pension plans with accumulated benefit obligations in excess of plan assets as of December 31:

	Qualified and Non-qualified Pension Plans
	United States				International
(Millions)	2015		2014		2015		2014
Projected benefit obligation	$	15,856	$	16,435	$	2,382	$	2,588
Accumulated benefit obligation		14,834		15,319		2,149		2,335
Fair value of plan assets		13,966		14,623		1,566		1,636

Components of net periodic cost and other amounts recognized in other comprehensive income

Net periodic benefit cost is recorded in cost of sales, selling, general and administrative expenses, and research, development and related expenses. Components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for the years ended December 31 follow:

	Qualified and Non-qualified
	Pension Benefits												Postretirement
	United States						International						Benefits
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014		2013
Net periodic benefit cost (benefit)
Service cost	$	293	$	241	$	258	$	154	$	141	$	147	$	75	$	65	$	80
Interest cost		655		676		598		206		252		238		98		97		88
Expected return on plan assets		(1,069)		(1,043)		(1,046)		(308)		(312)		(291)		(91)		(90)		(90)
Amortization of transition (asset) obligation		—		—		—		(1)		(1)		(1)		—		—		—
Amortization of prior service cost (benefit)		(24)		4		5		(13)		(16)		(16)		(42)		(47)		(66)
Amortization of net actuarial (gain) loss		409		243		399		144		121		153		73		56		95
Net periodic benefit cost (benefit)	$	264	$	121	$	214	$	182	$	185	$	230	$	113	$	81	$	107
Settlements, curtailments, special termination benefits and other		2		—		—		(6)		4		2		1		—		—
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	$	266	$	121	$	214	$	176	$	189	$	232	$	114	$	81	$	107
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition (asset) obligation		—		—		—		1		1		1		—		—		—
Prior service cost (benefit)		—		(266)		—		10		3		3		(212)		—		(20)
Amortization of prior service cost (benefit)		24		(4)		(5)		13		16		16		42		47		66
Net actuarial (gain) loss		312		2,167		(743)		(270)		592		(294)		(23)		358		(313)
Amortization of net actuarial (gain) loss		(409)		(243)		(399)		(144)		(121)		(153)		(73)		(56)		(95)
Foreign currency		—		—		—		(174)		(215)		(47)		(1)		(1)		(2)
Total recognized in other comprehensive (income) loss	$	(73)	$	1,654	$	(1,147)	$	(564)	$	276	$	(474)	$	(267)	$	348	$	(364)
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	$	193	$	1,775	$	(933)	$	(388)	$	465	$	(242)	$	(153)	$	429	$	(257)

Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over the next fiscal year

	Qualified and Non-qualified
	Pension Benefits				Postretirement
(Millions)	United States		International		Benefits
Amortization of transition (asset) obligation	$	—	$	(1)	$	—
Amortization of prior service cost (benefit)		(24)		(13)		(55)
Amortization of net actuarial (gain) loss		354		90		62
Total amortization expected over the next fiscal year	$	330	$	76	$	7

The Company primarily amortizes amounts recognized as prior service cost (benefit) over the average future service period of active employees at the date of the amendment.

Weighted-average assumptions used to determine benefit obligations as of December 31

	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Discount rate	4.47	%	4.10	%	4.98	%	3.12	%	3.11	%	4.02	%	4.48	%	4.07	%	4.83	%
Compensation rate increase	4.10	%	4.10	%	4.00	%	2.90	%	3.33	%	3.35	%	N/A		N/A		N/A

Weighted-average assumptions used to determine net cost for years ended December 31

	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Discount rate	4.10	%	4.98	%	4.14	%	3.11	%	4.02	%	3.78	%	4.07	%	4.83	%	4.00	%
Expected return on assets	7.75	%	7.75	%	8.00	%	5.90	%	5.83	%	5.87	%	6.91	%	7.11	%	7.19	%
Compensation rate increase	4.10	%	4.00	%	4.00	%	3.33	%	3.35	%	3.31	%	N/A		N/A		N/A

The Company is in the process of transitioning all current and future retirees in the U.S. postretirement health care benefit plans to a savings account benefits-based plan. The contributions provided by the Company to the health savings accounts increase 3 percent per year for employees who retired prior to January 1, 2016 and increase 1.5 percent for employees who retire on or after January 1, 2016. Therefore, the Company no longer has material exposure to health care cost inflation.

The Company determines the discount rate used to measure plan liabilities as of the December 31 measurement date for the pension and postretirement benefit plans, which is also the date used for the related annual measurement assumptions. The discount rate reflects the current rate at which the associated liabilities could be effectively settled at the end of the year. The Company sets its rate to reflect the yield of a portfolio of high quality, fixed-income debt instruments that would produce cash flows sufficient in timing and amount to settle projected future benefits. Using this methodology, the Company determined a discount rate of 4.47% for pension and 4.48% for postretirement benefits to be appropriate for its U.S. plans as of December 31, 2015, which is an increase of 0.37 percentage points and 0.41 percentage points, respectively, from the rates used as of December 31, 2014. For the international pension and postretirement plans the discount rates also reflect the current rate at which the associated liabilities could be effectively settled at the end of the year. If the country has a deep market in corporate bonds the Company matches the expected cash flows from the plan either to a portfolio of bonds that generate sufficient cash flow or a notional yield curve generated from available bond information. In countries that do not have a deep market in corporate bonds, government bonds are considered with a risk premium to approximate corporate bond yields. Beginning in 2016, 3M changed the method used to estimate the service and interest cost components of the net periodic pension and other postretirement benefit costs. The new method measures service and interest costs separately using the spot yield curve approach applied to each corresponding obligation. Service costs are determined based on duration-specific spot rates applied to the service cost cash flows. The interest cost calculation is determined by applying duration-specific spot rates to the year-by-year projected benefit payments. The spot yield curve approach does not affect the measurement of the total benefit obligations as the change in service and interest costs offset in the actuarial gains and losses recorded in other comprehensive income. The Company changed to the new method to provide a more precise measure of service and interest costs by improving the correlation between the projected benefit cash flows and the discrete spot yield curve rates. The Company accounted for this change as a change in estimate prospectively beginning in the first quarter of 2016.

For the primary U.S. qualified pension plan, the Company’s assumption for the expected return on plan assets was 7.75% in 2015. Projected returns are based primarily on broad, publicly traded equity and fixed-income indices and forward-looking estimates of active portfolio and investment management. As of December 31, 2015, the Company’s 2016 expected long-term rate of return on U.S. plan assets is 7.50%, a decrease of 0.25 percentage points from 2015. The expected return assumption is based on the strategic asset allocation of the plan, long term capital market return expectations and expected performance from active investment management. The 2015 expected long-term rate of return is based on an asset allocation assumption of 25% global equities, 18% private equities, 41% fixed-income securities, and 16% absolute return investments independent of traditional performance benchmarks, along with positive returns from active investment management. The actual net rate of return on plan assets in 2015 was 0.7%. In 2014 the plan earned a rate of return of 13.0% and in 2013 earned a return of 6.0%. The average annual actual return on the plan assets over the past 10 and 25 years has been 7.8% and 10.0%, respectively. Return on assets assumptions for international pension and other post-retirement benefit plans are calculated on a plan-by-plan basis using plan asset allocations and expected long-term rate of return assumptions.

During 2015, the Company contributed $264 million to its U.S. and international pension plans and $3 million to its postretirement plans. During 2014, the Company contributed $210 million to its U.S. and international pension plans and $5 million to its postretirement plans. In 2016, the Company expects to contribute an amount in the range of $100 million to $200 million of cash to its U.S. and international retirement plans. The Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2016. Future contributions will depend on market conditions, interest rates and other factors.

Future Pension and Postretirement Benefit Payments

The following table provides the estimated pension and postretirement benefit payments that are payable from the plans to participants.

	Qualified and Non-qualified
	Pension Benefits				Postretirement
(Millions)	United States		International		Benefits
2016 Benefit Payments	$	987	$	205	$	141
2017 Benefit Payments		997		215		156
2018 Benefit Payments		1,008		228		172
2019 Benefit Payments		1,017		241		153
2020 Benefit Payments		1,029		250		155
Next five years		5,187		1,480		797

Plan Asset Management

3M’s investment strategy for its pension and postretirement plans is to manage the funds on a going-concern basis. The primary goal of the trust funds is to meet the obligations as required. The secondary goal is to earn the highest rate of return possible, without jeopardizing its primary goal, and without subjecting the Company to an undue amount of contribution risk. Fund returns are used to help finance present and future obligations to the extent possible within actuarially determined funding limits and tax-determined asset limits, thus reducing the potential need for additional contributions from 3M. The investment strategy has used long duration cash bonds and derivative instruments to offset a significant portion of the interest rate sensitivity of U.S. pension liabilities.

Normally, 3M does not buy or sell any of its own securities as a direct investment for its pension and other postretirement benefit funds. However, due to external investment management of the funds, the plans may indirectly buy, sell or hold 3M securities. The aggregate amount of 3M securities are not considered to be material relative to the aggregate fund percentages.

The discussion that follows references the fair value measurements of certain assets in terms of levels 1, 2 and 3. See Note 13 for descriptions of these levels. While the company believes the valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

U.S. Pension Plans and Postretirement Benefit Plan Assets

In order to achieve the investment objectives in the U.S. pension plans and U.S. postretirement benefit plans, the investment policies include a target strategic asset allocation. The investment policies allow some tolerance around the target in recognition that market fluctuations and illiquidity of some investments may cause the allocation to a specific asset class to vary from the target allocation, potentially for long periods of time. Acceptable ranges have been designed to allow for deviation from strategic targets and to allow for the opportunity for tactical over- and under-weights. The portfolios will normally be rebalanced when the quarter-end asset allocation deviates from acceptable ranges. The allocation is reviewed regularly by the named fiduciary of the plans.  Approximately 39% of the postretirement benefit plan assets are in a 401(h) account. The 401(h) account assets are in the same trust as the primary U.S. pension plan and invested with the same investment objectives as the primary U.S. pension plan.

The fair values of the assets held by the U.S. pension plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
U.S. equities	$	1,897	$	1,766	$	—	$	—	$	—	$	—	$	1,897	$	1,766
Non-U.S. equities		1,149		1,214		—		—		—		—		1,149		1,214
Index and long/short equity funds*														578		607
Total Equities	$	3,046	$	2,980	$	—	$	—	$	—	$	—	$	3,624	$	3,587
Fixed Income
U.S. government securities	$	1,095	$	1,032	$	456	$	590	$	—	$	—	$	1,551	$	1,622
Non-U.S. government securities		—		7		126		381		—		—		126		388
Preferred and convertible securities		4		6		8		9		—		—		12		15
U.S. corporate bonds		9		8		2,820		2,889		—		—		2,829		2,897
Non-U.S. corporate bonds		—		—		616		566		—		—		616		566
Derivative instruments		(1)		6		40		126		—		—		39		132
Other*														11		32
Total Fixed Income	$	1,107	$	1,059	$	4,066	$	4,561	$	—	$	—	$	5,184	$	5,652
Private Equity
Derivative instruments	$	—	$	—	$	—	$	—	$	(106)	$	(74)	$	(106)	$	(74)
Growth equity		24		15		—		—		—		—		24		15
Partnership investments*														2,450		2,561
Total Private Equity	$	24	$	15	$	—	$	—	$	(106)	$	(74)	$	2,368	$	2,502
Absolute Return
Derivative instruments	$	—	$	—	$	(5)	$	—	$	—	$	—	$	(5)	$	—
Fixed income and other		253		26		46		52		—		—		299		78
Hedge fund/fund of funds*														1,409		1,807
Partnership investments*														355		288
Total Absolute Return	$	253	$	26	$	41	$	52	$	—	$	—	$	2,058	$	2,173
Cash and Cash Equivalents
Cash and cash equivalents	$	102	$	287	$	6	$	86	$	—	$	—	$	108	$	373
Cash and cash equivalents, valued at net asset value*														783		531
Total Cash and Cash Equivalents	$	102	$	287	$	6	$	86	$	—	$	—	$	891	$	904
Total	$	4,532	$	4,367	$	4,113	$	4,699	$	(106)	$	(74)	$	14,125	$	14,818
Other items to reconcile to fair value of plan assets													$	(159)	$	(175)
Fair value of plan assets													$	13,966	$	14,643

* In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value (NAV) per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

The fair values of the assets held by the postretirement benefit plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
U.S. equities	$	508	$	565	$	—	$	—	$	—	$	—	$	508	$	565
Non-U.S. equities		59		56		—		—		—		—		59		56
Index and long/short equity funds*														49		55
Total Equities	$	567	$	621	$	—	$	—	$	—	$	—	$	616	$	676
Fixed Income
U.S. government securities	$	71	$	68	$	192	$	186	$	—	$	—	$	263	$	254
Non-U.S. government securities		—		—		8		17		—		—		8		17
U.S. corporate bonds		—		—		153		146		—		—		153		146
Non-U.S. corporate bonds		—		—		35		34		—		—		35		34
Derivative instruments		—		—		2		5		—		—		2		5
Other*														—		1
Total Fixed Income	$	71	$	68	$	390	$	388	$	—	$	—	$	461	$	457
Private Equity
Derivative instruments	$	—	$	—	$	—	$	—	$	(4)	$	(3)	$	(4)	$	(3)
Growth equity		1		1		—		—		—		—		1		1
Partnership investments*														136		162
Total Private Equity	$	1	$	1	$	—	$	—	$	(4)	$	(3)	$	133	$	160
Absolute Return
Fixed income and other	$	10	$	1	$	2	$	2	$	—	$	—	$	12	$	3
Hedge fund/fund of funds*														54		66
Partnership investments*														14		10
Total Absolute Return	$	10	$	1	$	2	$	2	$	—	$	—	$	80	$	79
Cash and Cash Equivalents
Cash and cash equivalents	$	38	$	33	$	—	$	3	$	—	$	—	$	38	$	36
Cash and cash equivalents, valued at net asset value*														30		20
Total Cash and Cash Equivalents	$	38	$	33	$	—	$	3	$	—	$	—	$	68	$	56
Total	$	687	$	724	$	392	$	393	$	(4)	$	(3)	$	1,358	$	1,428
Other items to reconcile to fair value of plan assets													$	9	$	8
Fair value of plan assets													$	1,367	$	1,436

*In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded.

Fixed income includes derivative instruments such as credit default swaps, interest rate swaps and futures contracts. Corporate debt includes bonds and notes, asset backed securities, collateralized mortgage obligations and private placements. Swaps and derivative instruments are valued by the custodian using closing market swap curves and market derived inputs. U.S. government and government agency bonds and notes are valued at the closing price reported in the active market in which the individual security is traded. Corporate bonds and notes, asset backed securities and collateralized mortgage obligations are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks. Private placements are valued by the custodian using recognized pricing services and sources. 

The private equity portfolio is a diversified mix of derivative instruments, growth equity and partnership interests. Derivative investments are written options that are valued by independent parties using market inputs and valuation models. Growth equity investments are valued at the closing price reported in the active market in which the individual securities are traded.  

Absolute return consists primarily of partnership interests in hedge funds, hedge fund of funds or other private fund vehicles. Corporate debt instruments are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risk ratings.

Other items to reconcile to fair value of plan assets include the net of insurance receivables for WG Trading Company, interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.

The balances of and changes in the fair values of the U.S. pension plans’ and postretirement plans’ level 3 assets for the periods ended December 31, 2015 and 2014 were not material.

International Pension Plans Assets

Outside the U.S., pension plan assets are typically managed by decentralized fiduciary committees. The disclosure below of asset categories is presented in aggregate for over 70 defined benefit plans in 27 countries; however, there is significant variation in asset allocation policy from country to country. Local regulations, local funding rules, and local financial and tax considerations are part of the funding and investment allocation process in each country. The Company provides standard funding and investment guidance to all international plans with more focused guidance to the larger plans.

Each plan has its own strategic asset allocation. The asset allocations are reviewed periodically and rebalanced when necessary.

The fair values of the assets held by the international pension plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
Growth equities	$	718	$	672	$	195	$	176	$	—	$	—	$	913	$	848
Value equities		494		595		27		23		—		—		521		618
Core equities		31		19		671		624		4		4		706		647
Equities, valued at net asset value*														17		18
Total Equities	$	1,243	$	1,286	$	893	$	823	$	4	$	4	$	2,157	$	2,131
Fixed Income
Domestic government	$	283	$	87	$	346	$	533	$	4	$	3	$	633	$	623
Foreign government		—		45		206		670		—		—		206		715
Corporate debt securities		30		1		661		701		10		12		701		714
Fixed income securities, valued at net asset value*														770		863
Total Fixed Income	$	313	$	133	$	1,213	$	1,904	$	14	$	15	$	2,310	$	2,915
Private Equity
Real estate	$	1	$	3	$	5	$	5	$	4	$	4	$	10	$	12
Real estate, valued at net asset value*														126		119
Partnership investments*														24		23
Total Private Equity	$	1	$	3	$	5	$	5	$	4	$	4	$	160	$	154
Absolute Return
Derivatives	$	(2)	$	—	$	15	$	(4)	$	—	$	—	$	13	$	(4)
Insurance		—		—		—		—		456		476		456		476
Other		—		—		4		10		3		3		7		13
Other, valued at net asset value*														1		3
Hedge funds*														119		117
Total Absolute Return	$	(2)	$	—	$	19	$	6	$	459	$	479	$	596	$	605
Cash and Cash Equivalents
Cash and cash equivalents	$	126	$	161	$	347	$	29	$	—	$	—	$	473	$	190
Cash and cash equivalents, valued at net asset value*														1		3
Total Cash and Cash Equivalents	$	126	$	161	$	347	$	29	$	—	$	—	$	474	$	193
Total	$	1,681	$	1,583	$	2,477	$	2,767	$	481	$	502	$	5,697	$	5,998
Other items to reconcile to fair value of plan assets													$	(28)	$	(41)
Fair value of plan assets													$	5,669	$	5,957

*In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

Equities consist primarily of mandates in public equity securities managed to various public equity indices. Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded.

Fixed Income investments include domestic and foreign government, and corporate, (including mortgage backed and other debt) securities. Governments, corporate bonds and notes and mortgage backed securities are valued at the closing price reported if traded on an active market or at yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks.

Private equity funds consist of partnership interests in a variety of funds. Real estate consists of property funds and REITS (Real Estate Investment Trusts). REITS are valued at the closing price reported in the active market in which it is traded.

Absolute return consists of private partnership interests in hedge funds, insurance contracts, derivative instruments, hedge fund of funds, and other alternative investments. Insurance consists of insurance contracts, which are valued using cash surrender values which is the amount the plan would receive if the contract was cashed out at year end. Derivative instruments consist of interest rate swaps that are used to help manage risks. 

Other items to reconcile to fair value of plan assets include the net of interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.

The balances of and changes in the fair values of the international pension plans’ level 3 assets consist primarily of insurance contracts under the absolute return asset class.  The aggregate of net purchases and net unrealized gains increased this balance by$16million and $46 million in 2015 and 2014, respectively.  Foreign currency exchange impacts decreased this balance by$36 million and $62 million in 2015 and 2014, respectively.

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Derivatives

12 Months Ended

Dec. 31, 2015

Derivatives

Derivatives

NOTE 12.  Derivatives

The Company uses interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity price fluctuations. The information that follows explains the various types of derivatives and financial instruments used by 3M, how and why 3M uses such instruments, how such instruments are accounted for, and how such instruments impact 3M’s financial position and performance.

Additional information with respect to the impacts on other comprehensive income of nonderivative hedging and derivative instruments is included in Note 6. Additional information with respect to the fair value of derivative instruments is included in Note 13. References to information regarding derivatives and/or hedging instruments associated with the Company’s long-term debt are also made in Note 10.

Types of Derivatives/Hedging Instruments and Inclusion in Income/Other Comprehensive Income:

Cash Flow Hedges:

For derivative instruments that are designated and qualify as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.

Cash Flow Hedging - Foreign Currency Forward and Option Contracts: The Company enters into foreign exchange forward and option contracts to hedge against the effect of exchange rate fluctuations on cash flows denominated in foreign currencies. These transactions are designated as cash flow hedges. The settlement or extension of these derivatives will result in reclassifications (from accumulated other comprehensive income) to earnings in the period during which the hedged transactions affect earnings. 3M may dedesignate these cash flow hedge relationships in advance of the occurrence of the forecasted transaction. The portion of gains or losses on the derivative instrument previously accumulated in other comprehensive income for dedesignated hedges remains in accumulated other comprehensive income until the forecasted transaction occurs. Changes in the value of derivative instruments after dedesignation are recorded in earnings and are included in the Derivatives Not Designated as Hedging Instruments section below. Beginning in the second quarter of 2014, 3M began extending the maximum length of time over which it hedges its exposure to the variability in future cash flows of the forecasted transactions from a previous term of 12 months to a longer term of 24 months, with certain currencies being extended further to 36 months starting in the first quarter of 2015.

Cash Flow Hedging - Commodity Price Management: The Company manages commodity price risks through negotiated supply contracts, price protection agreements and forward contracts. 3M discontinued the use of commodity price swaps as cash flow hedges of forecasted commodity transactions in the first quarter of 2015. The Company used commodity price swaps as cash flow hedges of forecasted commodity transactions to manage price volatility. The related mark-to-market gain or loss on qualifying hedges was included in other comprehensive income to the extent effective, and reclassified into cost of sales in the period during which the hedged transaction affected earnings.

Cash Flow Hedging — Interest Rate Contracts:In the third and fourth quarters of 2014, the Company entered into forward starting interest rate swaps with notional amounts totaling 500 million Euros as a hedge against interest rate volatility associated with the forecasted issuance of fixed rate debt. 3M terminated these interest rate swaps upon issuance of 750 million Euros aggregate principal amount of twelve-year fixed rate notes in connection with 3M’s 1.250 billion Eurobond offering in November 2014. The termination resulted in a $8 million pre-tax ($5 million after-tax) loss within accumulated other comprehensive income that will be amortized over the twelve-year life of the notes.

The amortization of gains and losses on forward starting interest rate swaps is included in the tables below as part of the  gain/(loss) recognized in income on the effective portion of derivatives as a result of reclassification from accumulated other comprehensive income.

As of December 31, 2015, the Company had a balance of $124 million associated with the after tax net unrealized gain associated with cash flow hedging instruments recorded in accumulated other comprehensive income. This includes a remaining balance of $5 million (after tax loss) related to forward starting interest rate swaps, which will be amortized over the respective lives of the notes. Based on exchange rates as of December 31, 2015, 3M expects to reclassify approximately $98 million of the after-tax net unrealized foreign exchange cash flow hedging gains to earnings in 2016, approximately $23 million of the after-tax net unrealized foreign exchange cash flow hedging gains to earnings in 2017, and approximately $3 million of the after-tax net unrealized foreign exchange cash flow hedging gains to earnings after 2017 (with the impact offset by earnings/losses from underlying hedged items).

The location in the consolidated statements of income and comprehensive income and amounts of gains and losses related to derivative instruments designated as cash flow hedges are provided in the following table. Reclassifications of amounts from accumulated other comprehensive income into income include accumulated gains (losses) on dedesignated hedges at the time earnings are impacted by the forecasted transaction.

Year Ended December 31, 2015

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	212	Cost of sales	$	178	Cost of sales	$	—
Commodity price swap contracts		—	Cost of sales		(2)	Cost of sales		—
Interest rate swap contracts		—	Interest expense		(2)	Interest expense		—
Total	$	212		$	174		$	—

Year Ended December 31, 2014

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	183	Cost of sales	$	3	Cost of sales	$	—
Commodity price swap contracts		(4)	Cost of sales		2	Cost of sales		—
Interest rate swap contracts		(8)	Interest expense		(1)	Interest expense		—
Total	$	171		$	4		$	—

Year Ended December 31, 2013

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	9	Cost of sales	$	(11)	Cost of sales	$	—
Foreign currency forward contracts		(108)	Interest expense		(108)	Interest expense		—
Commodity price swap contracts		1	Cost of sales		(2)	Cost of sales		—
Interest rate swap contracts		—	Interest expense		(1)	Interest expense		—
Total	$	(98)		$	(122)		$	—

Fair Value Hedges:

For derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivatives as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings.

Fair Value Hedging - Interest Rate Swaps: The Company manages interest expense using a mix of fixed and floating rate debt. To help manage borrowing costs, the Company may enter into interest rate swaps. Under these arrangements, the Company agrees to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. The mark-to-market of these fair value hedges is recorded as gains or losses in interest expense and is offset by the gain or loss of the underlying debt instrument, which also is recorded in interest expense. These fair value hedges are highly effective and, thus, there is no impact on earnings due to hedge ineffectiveness.

In July 2007, in connection with the issuance of a seven-year Eurobond for an amount of 750 million Euros, the Company completed a fixed-to-floating interest rate swap on a notional amount of 400 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation. In August 2010, the Company terminated 150 million Euros of the notional amount of this swap. As a result, a gain of 18 million Euros, recorded as part of the balance of the underlying debt, was amortized as an offset to interest expense over this debt’s remaining life. Prior to termination of the applicable portion of the interest rate swap, the mark-to-market of the hedge instrument was recorded as gains or losses in interest expense and was offset by the gain or loss on carrying value of the underlying debt instrument. Consequently, the subsequent amortization of the 18 million Euros recorded as part of the underlying debt balance was not part of gains on hedged items recognized in income in the tables below. The remaining interest rate swap of 250 million Euros (notional amount) matured in July 2014.

In November 2013, 3M issued a Eurobond due in 2021 for a face amount of 600 million Euros. Upon debt issuance, 3M completed a fixed-to-floating interest rate swap on a notional amount of 300 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation.

In June 2014, 3M issued $950 million aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into an interest rate swap to convert $600 million of a $625 million note included in this issuance to an interest rate based on a floating three-month LIBOR index as a fair value hedge of a portion of the fixed interest rate medium-term note obligation.

In August 2015, 3M issued $1.500 billion aggregate principal amount of medium-term notes. Upon debt issuance, the Company entered into two interest rate swaps as fair value hedges of a portion of the fixed interest rate medium-term note obligation. The first converted a $450 million three-year fixed rate note, and the second converted $300 million of a five-year fixed rate note included in this issuance to an interest rate based on a floating three-month LIBOR index.

The location in the consolidated statements of income and amounts of gains and losses related to derivative instruments designated as fair value hedges and similar information relative to the hedged items are as follows:

Year ended December 31, 2015	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	(2)	Interest expense	$	2
Total		$	(2)		$	2

Year ended December 31, 2014	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	11	Interest expense	$	(11)
Total		$	11		$	(11)

Year ended December 31, 2013	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	(21)	Interest expense	$	21
Total		$	(21)		$	21

Net Investment Hedges:

The Company may use non-derivative (foreign currency denominated debt) and derivative (foreign exchange forward contracts) instruments to hedge portions of the Company’s investment in foreign subsidiaries and manage foreign exchange risk. For instruments that are designated and qualify as hedges of net investments in foreign operations and that meet the effectiveness requirements, the net gains or losses attributable to changes in spot exchange rates are recorded in cumulative translation within other comprehensive income. The remainder of the change in value of such instruments is recorded in earnings. Recognition in earnings of amounts previously recorded in cumulative translation is limited to circumstances such as complete or substantially complete liquidation of the net investment in the hedged foreign operation. To the extent foreign currency denominated debt is not designated in or is dedesignated from a net investment hedge relationship, changes in value of that portion of foreign currency denominated debt due to exchange rate changes are recorded in earnings through their maturity date.

3M’s use of foreign exchange forward contracts designated in hedges of the Company’s net investment in foreign subsidiaries can vary by time period depending on when foreign currency denominated debt balances designated in such relationships are dedesignated, matured, or are newly issued and designated. Additionally, variation can occur in connection with the extent of the Company’s desired foreign exchange risk coverage.

At December 31, 2015, the total notional amount of foreign exchange forward contracts designated in net investment hedges was approximately 974 million Euros and approximately 248 billion South Korean Won, along with a principal amount of long-term debt instruments designated in net investment hedges totaling 3.6 billion Euros. The maturity dates of these derivative and nonderivative instruments designated in net investment hedges range from 2016 to 2030.

The location in the consolidated statements of income and comprehensive income and amounts of gains and losses related to derivative and nonderivative instruments designated as net investment hedges are as follows. There were no reclassifications of the effective portion of net investment hedges out of accumulated other comprehensive income into income for the periods presented in the table below.

Year ended December 31, 2015

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	63	N/A	$	—
Foreign currency forward contracts		143	Cost of sales		11
Total	$	206		$	11

Year ended December 31, 2014

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	152	N/A	$	—
Foreign currency forward contracts		94	Cost of sales		1
Total	$	246		$	1

Year ended December 31, 2013

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	(82)	N/A	$	—
Foreign currency forward contracts		12	Cost of sales		—
Total	$	(70)		$	—

Derivatives Not Designated as Hedging Instruments:

Derivatives not designated as hedging instruments include dedesignated foreign currency forward and option contracts that formerly were designated in cash flow hedging relationships (as referenced in the Cash Flow Hedges section above). In addition, 3M enters into foreign currency forward contracts to offset, in part, the impacts of certain intercompany activities (primarily associated with intercompany licensing arrangements) and enters into commodity price swaps to offset, in part, fluctuations in costs associated with the use of certain commodities and precious metals. These derivative instruments are not designated in hedging relationships; therefore, fair value gains and losses on these contracts are recorded in earnings. The Company does not hold or issue derivative financial instruments for trading purposes.

The location in the consolidated statements of income and amounts of gains and losses related to derivative instruments not designated as hedging instruments are as follows:

	Gain (Loss) on Derivative Recognized in Income
			Year ended		Year ended		Year ended
			December 31,		December 31,		December 31,
Derivatives Not Designated as Hedging Instruments			2015		2014		2013
(Millions)	Location		Amount		Amount		Amount
Foreign currency forward/option contracts	Cost of sales	$	5	$	10	$	20
Foreign currency forward contracts	Interest expense		(30)		(40)		(43)
Commodity price swap contracts	Cost of sales		(3)		—		(1)
Total		$	(28)	$	(30)	$	(24)

Location and Fair Value Amount of Derivative Instruments:

The following tables summarize the fair value of 3M’s derivative instruments, excluding nonderivative instruments used as hedging instruments, and their location in the consolidated balance sheet. Notional amounts below are presented at period end foreign exchange rates, except for certain interest rate swaps, which are presented using the inception date’s foreign exchange rate. Additional information with respect to the fair value of derivative instruments is included in Note 13.

	Gross		Assets			Liabilities
December 31, 2015	Notional			Fair			Fair
(Millions)	Amount		Location	Value Amount		Location	Value Amount
Derivatives designated as
hedging instruments
Foreign currency forward/option contracts	$	2,815	Other current assets	$	148	Other current liabilities	$	14
Foreign currency forward/option contracts		1,240	Other assets		61	Other liabilities		3
Interest rate swap contracts		1,753	Other assets		24	Other liabilities		1
Total derivatives designated as hedging instruments				$	233		$	18
Derivatives not designated as
hedging instruments
Foreign currency forward/option contracts	$	5,359	Other current assets	$	63	Other current liabilities	$	51
Total derivatives not designated as hedging instruments				$	63		$	51
Total derivative instruments				$	296		$	69

	Gross		Assets			Liabilities
December 31, 2014	Notional			Fair			Fair
(Millions)	Amount		Location	Value Amount		Location	Value Amount
Derivatives designated as
hedging instruments
Foreign currency forward/option contracts	$	1,865	Other current assets	$	116	Other current liabilities	$	2
Foreign currency forward/option contracts		656	Other assets		47	Other liabilities		1
Commodity price swap contracts		20	Other current assets		—	Other current liabilities		4
Interest rate swap contracts		1,003	Other assets		27	Other liabilities		3
Total derivatives designated as hedging instruments				$	190		$	10
Derivatives not designated as
hedging instruments
Foreign currency forward/option contracts	$	6,582	Other current assets	$	66	Other current liabilities	$	33
Total derivatives not designated as hedging instruments				$	66		$	33
Total derivative instruments				$	256		$	43

Credit Risk and Offsetting of Assets and Liabilities of Derivative Instruments:

The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company’s risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. As of December 31, 2015, 3M has International Swaps and Derivatives Association (ISDA) agreements with 16 applicable banks and financial institutions which contain netting provisions. In addition to a master agreement with 3M supported by aprimary counterparty’s parent guarantee, 3M also has associated credit support agreements in place with 15 of its primary derivative counterparties which, among other things, provide the circumstances under which either party is required to post eligible collateral (when the market value of transactions covered by these agreements exceeds specified thresholds or if a counterparty’s credit rating has been downgraded to a predetermined rating). The Company does not anticipate nonperformance by any of these counterparties.

3M has elected to present the fair value of derivative assets and liabilities within the Company’s consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation. However, the following tables provide information as if the Company had elected to offset the asset and liability balances of derivative instruments, netted in accordance with various criteria in the event of default or termination as stipulated by the terms of netting arrangements with each of the counterparties. For each counterparty, if netted, the Company would offset the asset and liability balances of all derivatives at the end of the reporting period based on the 3M entity that is a party to the transactions. Derivatives not subject to master netting agreements are not eligible for net presentation. As of the applicable dates presented below, no cash collateral had been received or pledged related to these derivative instruments.

Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties

December 31, 2015			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Assets		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Liabilities		Received		Derivative Assets
Derivatives subject to master netting agreements	$	296	$	37	$	—	$	259
Derivatives not subject to master netting agreements		—						—
Total	$	296					$	259

December 31, 2014			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Assets		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Liabilities		Received		Derivative Assets
Derivatives subject to master netting agreements	$	256	$	20	$	—	$	236
Derivatives not subject to master netting agreements		—						—
Total	$	256					$	236

Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties

December 31, 2015			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Liabilities		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Assets		Pledged		Derivative Liabilities
Derivatives subject to master netting agreements	$	64	$	37	$	—	$	27
Derivatives not subject to master netting agreements		5						5
Total	$	69					$	32

December 31, 2014			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Liabilities		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Assets		Pledged		Derivative Liabilities
Derivatives subject to master netting agreements	$	36	$	20	$	—	$	16
Derivatives not subject to master netting agreements		7						7
Total	$	43					$	23

Foreign Currency Effects

3M estimates that year-on-year foreign currency transaction effects, including hedging impacts, increased pre-tax income by approximately$180 million and $10 million in 2015 and 2014, respectively. These estimates include transaction gains and losses, including derivative instruments designed to reduce foreign currency exchange rate risks and the negative impact of swapping Venezuelan bolivars into U.S. dollars.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2015

Fair Value Measurements

Fair Value Measurements

NOTE 13.  Fair Value Measurements

3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis:

For 3M, assets and liabilities that are measured at fair value on a recurring basis primarily relate to available-for-sale marketable securities, available-for-sale investments (included as part of investments in the Consolidated Balance Sheet) and certain derivative instruments. Derivatives include cash flow hedges, interest rate swaps and most net investment hedges. The information in the following paragraphs and tables primarily addresses matters relative to these financial assets and liabilities. Separately, there were no material fair value measurements with respect to nonfinancial assets or liabilities that are recognized or disclosed at fair value in the Company’s financial statements on a recurring basis for 2015 and 2014.

3M uses various valuation techniques, which are primarily based upon the market and income approaches, with respect to financial assets and liabilities. Following is a description of the valuation methodologies used for the respective financial assets and liabilities measured at fair value.

Available-for-sale marketable securities — except certain U.S. municipal securities:

Marketable securities, except certain U.S. municipal securities, are valued utilizing multiple sources. A weighted average price is used for these securities. Market prices are obtained for these securities from a variety of industry standard data providers, security master files from large financial institutions, and other third-party sources. These multiple prices are used as inputs into a distribution-curve-based algorithm to determine the daily fair value to be used. 3M classifies U.S. treasury securities as level 1, while all other marketable securities (excluding certain U.S. municipal securities) are classified as level 2. Marketable securities are discussed further in Note 9.

Available-for-sale marketable securities —certain U.S. municipal securities only:

In the fourth quarter 2014, 3M obtained a municipal bond with the City of Nevada, Missouri, which represent 3M’s only U.S. municipal securities holding as of December 31, 2015. Due to the nature of this security, the valuation method utilized will include the financial health of the City of Nevada, any recent municipal bond issuances by Nevada, and macroeconomic considerations related to the direction of interest rates and the health of the overall municipal bond market, and as such will be classified as a level 3 security.

Available-for-sale investments:

Investments include equity securities that are traded in an active market. Closing stock prices are readily available from active markets and are used as being representative of fair value. 3M classifies these securities as level 1.

Derivative instruments:

The Company’s derivative assets and liabilities within the scope of ASC 815, Derivatives and Hedging, are required to be recorded at fair value. The Company’s derivatives that are recorded at fair value include foreign currency forward and option contracts, commodity price swaps, interest rate swaps, and net investment hedges where the hedging instrument is recorded at fair value. Net investment hedges that use foreign currency denominated debt to hedge 3M’s net investment are not impacted by the fair value measurement standard under ASC 820, as the debt used as the hedging instrument is marked to a value with respect to changes in spot foreign currency exchange rates and not with respect to other factors that may impact fair value.

3M has determined that foreign currency forwards, commodity price swaps, currency swaps, foreign currency options, interest rate swaps and cross-currency swaps will be considered level 2 measurements. 3M uses inputs other than quoted prices that are observable for the asset. These inputs include foreign currency exchange rates, volatilities, and interest rates. Derivative positions are primarily valued using standard calculations/models that use as their basis readily observable market parameters. Industry standard data providers are 3M’s primary source for forward and spot rate information for both interest rates and currency rates, with resulting valuations periodically validated through third-party or counterparty quotes and a net present value stream of cash flows model.

The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis.

			Fair Value Measurements
(Millions)	Fair Value at		Using Inputs Considered as
Description	December 31, 2015		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
Foreign government agency securities	$	10	$	—	$	10	$	—
Corporate debt securities		10		—		10		—
Commercial paper		12		—		12		—
Certificates of deposit/time deposits		26		—		26		—
Asset-backed securities:
Automobile loan related		26		—		26		—
Credit card related		10		—		10		—
Equipment lease related		2		—		2		—
Other		19		—		19		—
U.S. municipal securities		12		—		—		12
Derivative instruments — assets:
Foreign currency forward/option contracts		272		—		272		—
Interest rate swap contracts		24		—		24		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		68		—		68		—
Interest rate swap contracts		1		—		1		—

			Fair Value Measurements
(Millions)	Fair Value at		Using Inputs Considered as
Description	December 31, 2014		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
U.S. government agency securities	$	108	$	—	$	108	$	—
Foreign government agency securities		95		—		95		—
Corporate debt securities		619		—		619		—
Certificates of deposit/time deposits		41		—		41		—
Asset-backed securities:
Automobile loan related		282		—		282		—
Credit card related		162		—		162		—
Equipment lease related		48		—		48		—
Other		46		—		46		—
U.S. treasury securities		38		38		—		—
U.S. municipal securities		15		—		—		15
Investments		1		1		—		—
Derivative instruments — assets:
Foreign currency forward/option contracts		229		—		229		—
Interest rate swap contracts		27		—		27		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		36		—		36		—
Commodity price swap contracts		4		—		4		—
Interest rate swap contracts		3		—		3		—

The following table provides a reconciliation of the beginning and ending balances of items measured at fair value on a recurring basis in the table above that used significant unobservable inputs (level 3).

(Millions)
Marketable securities — certain U.S. municipal securities and auction rate
securities only	2015		2014		2013
Beginning balance	$	15	$	11	$	7
Total gains or losses:
Included in earnings		—		(1)		—
Included in other comprehensive income		—		2		4
Purchases and issuances		—		15		—
Sales and settlements		(3)		(12)		—
Transfers in and/or out of level 3		—		—		—
Ending balance		12		15		11
Change in unrealized gains or losses for the period included in earnings for securities held at the end of the reporting period		—		—		—

In addition, the plan assets of 3M’s pension and postretirement benefit plans are measured at fair value on a recurring basis (at least annually). Refer to Note 11.

Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis:

Disclosures are required for certain assets and liabilities that are measured at fair value, but are recognized and disclosed at fair value on a nonrecurring basis in periods subsequent to initial recognition. For 3M, such measurements of fair value relate primarily to long-lived asset impairments. There were no material long-lived asset impairments for 2015,  2014 and 2013.

Fair Value of Financial Instruments:

The Company’s financial instruments include cash and cash equivalents, marketable securities, accounts receivable, certain investments, accounts payable, borrowings, and derivative contracts. The fair values of cash and cash equivalents, accounts receivable, accounts payable, and short-term borrowings and current portion of long-term debt (except the medium-term fixed rate notes totaling $1 billion, which will mature in September 2016 and are shown separately in the table below) approximated carrying values because of the short-term nature of these instruments. Available-for-sale marketable securities and investments, in addition to certain derivative instruments, are recorded at fair values as indicated in the preceding disclosures. For its long-term debt, the Company utilized third-party quotes to estimate fair values (classified as level 2). Information with respect to the carrying amounts and estimated fair values of these financial instruments follow:

	December 31, 2015				December 31, 2014
	Carrying		Fair		Carrying		Fair
(Millions)	Value		Value		Value		Value
Medium-term fixed rate note due September 2016 (long-term in 2014 and short-term in 2015)	$	999	$	1,003	$	996	$	1,014
Long-term debt, excluding current portion and medium-term fixed rate note due September 2016		8,753		9,101		5,709		6,189

The fair values reflected above consider the terms of the related debt absent the impacts of derivative/hedging activity. The carrying amount of long-term debt referenced above is impacted by certain fixed-to-floating interest rate swaps that are designated as fair value hedges and by the designation of fixed rate Eurobond securities issued by the Company as hedging instruments of the Company’s net investment in its European subsidiaries. Many of 3M’s fixed-rate bonds were trading at a premium at December 31, 2015 and 2014 due to the low interest rates and tightening of 3M’s credit spreads.

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies

Commitments and Contingencies

NOTE 14.  Commitments and Contingencies

Capital and Operating Leases:

Rental expense under operating leases was $316 million in 2015,  $332 million in 2014 and $330 million in 2013. It is 3M’s practice to secure renewal rights for leases, thereby giving 3M the right, but not the obligation, to maintain a presence in a leased facility. 3M has three primary capital leases. First, 3M has a capital lease, which became effective in April 2003, that involves a building in the United Kingdom (with a lease term of 22 years). During the second quarter of 2003, 3M recorded a capital lease asset and obligation of approximately 33.5 million British Pound (GBP), or approximately $50 million at December 31, 2015, exchange rates. Second, during the fourth quarter of 2009, 3M recorded a capital lease asset and obligation of approximately $50 million related to an IT investment with an amortization period of seven years. Third, in the fourth quarter of 2014, 3M recorded a capital lease asset and obligation of approximately $15 million, which is discussed in more detail in Note 7.

Minimum lease payments under capital and operating leases with non-cancelable terms in excess of one year as of December 31, 2015, were as follows:

			Operating
(Millions)	Capital Leases		Leases
2016	$	11	$	234
2017		6		191
2018		4		134
2019		3		86
2020		3		72
After 2020		32		226
Total	$	59	$	943
Less: Amounts representing interest		5
Present value of future minimum lease payments		54
Less: Current obligations under capital leases		8
Long-term obligations under capital leases	$	46

Unconditional Purchase Obligations:

Unconditional purchase obligations are defined as an agreement to purchase goods or services that is enforceable and legally binding (non-cancelable, or cancelable only in certain circumstances). The Company estimates its total unconditional purchase obligation commitment (for those contracts with terms in excess of one year) as of December 31, 2015, at $596 million. Payments by year are estimated as follows: 2016 ($193 million), 2017 ($160 million), 2018 ($102 million), 2019 ($54 million), 2020 ($56 million) and after 2020 ($31 million). Many of these commitments relate to take or pay contracts, in which 3M guarantees payment to ensure availability of products or services that are sold to customers. The Company expects to receive consideration (products or services) for these unconditional purchase obligations. The purchase obligation amounts do not represent the entire anticipated purchases in the future, but represent only those items for which the Company is contractually obligated. The majority of 3M’s products and services are purchased as needed, with no unconditional commitment. For this reason, these amounts will not provide an indication of the Company’s expected future cash outflows related to purchase obligations.

Warranties/Guarantees:

3M’s accrued product warranty liabilities, recorded on the Consolidated Balance Sheet as part of current and long-term liabilities, are estimated at approximately $28 million at December 31, 2015, and $30 million at December 31, 2014. 3M does not consider this amount to be material. The fair value of 3M guarantees of loans with third parties and other guarantee arrangements are not material.

Related Party Activity:

3M does not have any material related party activity.

Legal Proceedings:

The Company and some of its subsidiaries are involved in numerous claims and lawsuits, principally in the United States, and regulatory proceedings worldwide. These include various products liability (involving products that the Company now or formerly manufactured and sold), intellectual property, and commercial claims and lawsuits, including those brought under the antitrust laws, and environmental proceedings. Unless otherwise stated, the Company is vigorously defending all such litigation.

Process for Disclosure and Recording of Liabilities and Insurance Receivables Related to Legal Proceedings

Many lawsuits and claims involve highly complex issues relating to causation, scientific evidence, and whether there are actual damages and are otherwise subject to substantial uncertainties. Assessments of lawsuits and claims can involve a series of complex judgments about future events and can rely heavily on estimates and assumptions. The Company complies with the requirements of ASC 450, Contingencies, and related guidance, and records liabilities for legal proceedings in those instances where it can reasonably estimate the amount of the loss and where liability is probable. Where the reasonable estimate of the probable loss is a range, the Company records the most likely estimate of the loss, or the low end of the range if there is no one best estimate. The Company either discloses the amount of a possible loss or range of loss in excess of established accruals if estimable, or states that such an estimate cannot be made. The Company discloses significant legal proceedings even where liability is not probable or the amount of the liability is not estimable, or both, if the Company believes there is at least a reasonable possibility that a loss may be incurred.

The Company estimates insurance receivables based on an analysis of its numerous policies, including their exclusions, pertinent case law interpreting comparable policies, its experience with similar claims, and assessment of the nature of the claim and remaining coverage, and records an amount it has concluded is likely to be recovered. For those insured matters where the Company has taken an accrual, the Company also records receivables for the amount of insurance that it expects to recover under the Company’s insurance program. For those insured matters where the Company has not taken an accrual because the liability is not probable or the amount of the liability is not estimable, or both, but where the Company has incurred an expense in defending itself, the Company records receivables for the amount of insurance that it expects to recover for the expense incurred.

Because litigation is subject to inherent uncertainties, and unfavorable rulings or developments could occur, there can be no certainty that the Company may not ultimately incur charges in excess of presently recorded liabilities. A future adverse ruling, settlement, or unfavorable development could result in future charges that could have a material adverse effect on the Company’s results of operations or cash flows in the period in which they are recorded. Although the Company cannot estimate its exposure to all legal proceedings, it currently believes that such future charges, if any, would not have a material adverse effect on the consolidated financial position of the Company. Based on experience and developments, the Company reexamines its estimates of probable liabilities and associated expenses and receivables each period, and whether it is able to estimate a liability previously determined to be not estimable and/or not probable. Where appropriate, the Company makes additions to or adjustments of its estimated liabilities. As a result, the current estimates of the potential impact on the Company’s consolidated financial position, results of operations and cash flows for the legal proceedings and claims pending against the Company could change in the future.

The following sections first describe the significant legal proceedings in which the Company is involved, and then describe the liabilities and associated insurance receivables the Company has accrued relating to its significant legal proceedings.

Respirator Mask/Asbestos Litigation

As of December 31, 2015, the Company is a named defendant, with multiple co-defendants, in numerous lawsuits in various courts that purport to represent approximately 2,130 individual claimants, compared to approximately 2,220 individual claimants with actions pending at December 31, 2014.

The vast majority of the lawsuits and claims resolved by and currently pending against the Company allege use of some of the Company’s mask and respirator products and seek damages from the Company and other defendants for alleged personal injury from workplace exposures to asbestos, silica, coal mine dust or other occupational dusts found in products manufactured by other defendants or generally in the workplace. A minority of the lawsuits and claims resolved by and currently pending against the Company generally allege personal injury from occupational exposure to asbestos from products previously manufactured by the Company, which are often unspecified, as well as products manufactured by other defendants, or occasionally at Company premises.

The Company’s current volume of new and pending matters is substantially lower than it experienced at the peak of filings in 2003. The Company expects that filing of claims by unimpaired claimants in the future will continue to be at much lower levels than in the past. Accordingly, the number of claims alleging more serious injuries, including mesothelioma and other malignancies, will represent a greater percentage of total claims than in the past. The Company has prevailed in all ten cases taken to trial, including eight of the nine cases tried to verdict (such trials occurred in 1999, 2000, 2001, 2003, 2004, 2007, and 2015), and an appellate reversal in 2005 of the 2001 jury verdict adverse to the Company. The remaining case, tried in 2009, was dismissed by the court at the close of plaintiff’s evidence, based on the court’s legal finding that the plaintiff had not presented sufficient evidence to support a jury verdict.

The Company has demonstrated in these past trial proceedings that its respiratory protection products are effective as claimed when used in the intended manner and in the intended circumstances. Consequently the Company believes that claimants are unable to establish that their medical conditions, even if significant, are attributable to the Company’s respiratory protection products. Nonetheless the Company’s litigation experience indicates that claims of persons with malignant conditions are costlier to resolve than the claims of unimpaired persons, and it therefore believes the average cost of resolving pending and future claims on a per-claim basis will continue to be higher than it experienced in prior periods when the vast majority of claims were asserted by the unimpaired.

As previously reported, the State of West Virginia, through its Attorney General, filed a complaint in 2003 against the Company and two other manufacturers of respiratory protection products in the Circuit Court of Lincoln County, West Virginia, and amended its complaint in 2005. The amended complaint seeks substantial, but unspecified, compensatory damages primarily for reimbursement of the costs allegedly incurred by the State for worker’s compensation and healthcare benefits provided to all workers with occupational pneumoconiosis and unspecified punitive damages. The case has been inactive since the fourth quarter of 2007, other than a case management conference in March 2011. In November 2013, the State filed a motion to bifurcate the lawsuit into separate liability and damages proceedings. At the hearing on the motion, the court declined to bifurcate the lawsuit. No liability has been recorded for this matter because the Company believes that liability is not probable and estimable at this time. In addition, the Company is not able to estimate a possible loss or range of loss given the lack of any meaningful discovery responses by the State of West Virginia, the otherwise minimal activity in this case and the fact that the complaint asserts claims against two other manufacturers where a defendant’s share of liability may turn on the law of joint and several liability and by the amount of fault, if any, a jury might allocate to each defendant if the case is ultimately tried.

Respirator Mask/Asbestos Liabilities and Insurance Receivables: The Company estimates its respirator mask/asbestos liabilities, including the cost to resolve the claims and defense costs, by examining: (i) the Company’s experience in resolving claims, (ii) apparent trends, (iii) the apparent quality of claims (e.g., whether the claim has been asserted on behalf of asymptomatic claimants), (iv) changes in the nature and mix of claims (e.g., the proportion of claims asserting usage of the Company’s mask or respirator products and alleging exposure to each of asbestos, silica, coal or other occupational dusts, and claims pleading use of asbestos-containing products allegedly manufactured by the Company), (v) the number of current claims and a projection of the number of future asbestos and other claims that may be filed against the Company, (vi) the cost to resolve recently settled claims, and (vii) an estimate of the cost to resolve and defend against current and future claims.

Developments may occur that could affect the Company’s estimate of its liabilities. These developments include, but are not limited to, significant changes in (i) the number of future claims, (ii) the average cost of resolving claims, (iii) the legal costs of defending these claims and in maintaining trial readiness, (iv) changes in the mix and nature of claims received, (v) trial and appellate outcomes, (vi) changes in the law and procedure applicable to these claims, and (vii) the financial viability of other co-defendants and insurers.

As a result of the Company’s cost of resolving claims of persons who claim more serious injuries, including mesothelioma and other malignancies, the Company increased its accruals in 2015 for respirator mask/asbestos liabilities by $50 million. In 2015, the Company made payments for legal fees and settlements of $46 million related to the respirator mask/asbestos litigation. As of December 31, 2015, the Company had accruals for respirator mask/asbestos liabilities of $144 million (excluding Aearo accruals). This accrual represents the low end in a range of loss. The Company cannot estimate the amount or upper end of the range of amounts by which the liability may exceed the accrual the Company has established because of the (i) inherent difficulty in projecting the number of claims that have not yet been asserted or the time period in which future claims may be asserted, (ii) the complaints nearly always assert claims against multiple defendants where the damages alleged are typically not attributed to individual defendants so that a defendant’s share of liability may turn on the law of joint and several liability, which can vary by state, (iii) the multiple factors described above that the Company considers in estimating its liabilities, and (iv) the several possible developments described above that may occur that could affect the Company’s estimate of liabilities.

As of December 31, 2015, the Company’s receivable for insurance recoveries related to the respirator mask/asbestos litigation was $39 million. The Company estimates insurance receivables based on an analysis of its policies, including their exclusions, pertinent case law interpreting comparable policies, its experience with similar claims, and an assessment of the nature of each claim and remaining coverage. The Company then records an amount it has concluded is likely to be recovered. Various factors could affect the timing and amount of recovery of this receivable, including (i) delays in or avoidance of payment by insurers; (ii) the extent to which insurers may become insolvent in the future, and (iii) the outcome of negotiations with insurers and legal proceedings with respect to respirator mask/asbestos liability insurance coverage.

The Company has unresolved coverage with claims-made carriers for respirator mask claims. The Company is also seeking coverage under the policies of certain insolvent insurers. Once those claims for coverage are resolved, the Company will have collected substantially all of its remaining insurance coverage for respirator mask/asbestos claims.

Respirator Mask/Asbestos Litigation — Aearo Technologies

On April 1, 2008, a subsidiary of the Company purchased the stock of Aearo Holding Corp., the parent of Aearo Technologies (“Aearo”). Aearo manufactured and sold various products, including personal protection equipment, such as eye, ear, head, face, fall and certain respiratory protection products.

As of December 31, 2015, Aearo and/or other companies that previously owned and operated Aearo’s respirator business (American Optical Corporation, Warner-Lambert LLC, AO Corp. and Cabot Corporation (“Cabot”)) are named defendants, with multiple co-defendants, including the Company, in numerous lawsuits in various courts in which plaintiffs allege use of mask and respirator products and seek damages from Aearo and other defendants for alleged personal injury from workplace exposures to asbestos, silica-related, or other occupational dusts found in products manufactured by other defendants or generally in the workplace.

As of December 31, 2015, the Company, through its Aearo subsidiary, had accruals of $21 million for product liabilities and defense costs related to current and future Aearo-related asbestos and silica-related claims. Responsibility for legal costs, as well as for settlements and judgments, is currently shared in an informal arrangement among Aearo, Cabot, American Optical Corporation and a subsidiary of Warner Lambert and their respective insurers (the “Payor Group”). Liability is allocated among the parties based on the number of years each company sold respiratory products under the “AO Safety” brand and/or owned the AO Safety Division of American Optical Corporation and the alleged years of exposure of the individual plaintiff. Aearo’s share of the contingent liability is further limited by an agreement entered into between Aearo and Cabot on July 11, 1995. This agreement provides that, so long as Aearo pays to Cabot a quarterly fee of $100,000, Cabot will retain responsibility and liability for, and indemnify Aearo against, any product liability claims involving exposure to asbestos, silica, or  silica products for respirators sold prior to July 11, 1995. Because of the difficulty in determining how long a particular respirator remains in the stream of commerce after being sold, Aearo and Cabot have applied the agreement to claims arising out of the alleged use of respirators involving exposure to asbestos, silica or silica products prior to January 1, 1997. With these arrangements in place, Aearo’s potential liability is limited to exposures alleged to have arisen from the use of respirators involving exposure to asbestos, silica, or silica products on or after January 1, 1997. To date, Aearo has elected to pay the quarterly fee. Aearo could potentially be exposed to additional claims for some part of the pre-July 11, 1995 period covered by its agreement with Cabot if Aearo elects to discontinue its participation in this arrangement, or if Cabot is no longer able to meet its obligations in these matters.

In March 2012, Cabot CSC Corporation and Cabot Corporation filed a lawsuit against Aearo in the Superior Court of Suffolk County, Massachusetts seeking declaratory relief as to the scope of Cabot’s indemnity obligations under the July 11, 1995 agreement, including whether Cabot has retained liability for coal workers’ pneumoconiosis claims, and seeking damages for breach of contract. In June 2014, the court granted Aearo’s motion for summary judgment on all claims. Cabot has filed a motion for reconsideration, and Aearo filed a motion for clarification of the court’s order granting Aearo summary judgment. In October 2014, the court denied Aearo’s motion for clarification. The court also denied, in part, Cabot’s motion for reconsideration and reaffirmed its ruling that Cabot retained liability for claims involving exposure to silica in coal mine dust. The court granted Cabot’s motion, in part, ruling that Aearo was not entitled to summary judgment on Cabot’s claim for equitable allocation, and on whether the 258 underlying claims were Cabot’s responsibility. These two issues remain in the case for further proceedings. New motions for summary judgment were filed and the court heard oral arguments in October 2015.

Developments may occur that could affect the estimate of Aearo’s liabilities. These developments include, but are not limited to: (i) significant changes in the number of future claims, (ii) significant changes in the average cost of resolving claims, (iii) significant changes in the legal costs of defending these claims, (iv) significant changes in the mix and nature of claims received, (v) trial and appellate outcomes, (vi) significant changes in the law and procedure applicable to these claims, (vii) significant changes in the liability allocation among the co-defendants, (viii) the financial viability of members of the Payor Group including exhaustion of available insurance coverage limits, and/or (ix) a determination that the interpretation of the contractual obligations on which Aearo has estimated its share of liability is inaccurate. The Company cannot determine the impact of these potential developments on its current estimate of Aearo’s share of liability for these existing and future claims. If any of the developments described above were to occur, the actual amount of these liabilities for existing and future claims could be significantly larger than the amount accrued.

Because of the inherent difficulty in projecting the number of claims that have not yet been asserted, the complexity of allocating responsibility for future claims among the Payor Group, and the several possible developments that may occur that could affect the estimate of Aearo’s liabilities, the Company cannot estimate the amount or range of amounts by which Aearo’s liability may exceed the accrual the Company has established.

Environmental Matters and Litigation

The Company’s operations are subject to environmental laws and regulations including those pertaining to air emissions, wastewater discharges, toxic substances, and the handling and disposal of solid and hazardous wastes enforceable by national, state, and local authorities around the world, and private parties in the United States and abroad. These laws and regulations provide, under certain circumstances, a basis for the remediation of contamination, for restoration of or compensation for damages to natural resources, and for personal injury and property damage claims. The Company has incurred, and will continue to incur, costs and capital expenditures in complying with these laws and regulations, defending personal injury and property damage claims, and modifying its business operations in light of its environmental responsibilities. In its effort to satisfy its environmental responsibilities and comply with environmental laws and regulations, the Company has established, and periodically updates, policies relating to environmental standards of performance for its operations worldwide.

Under certain environmental laws, including the United States Comprehensive Environmental Response, Compensation and Liability Act of 1980 and similar state laws, the Company may be jointly and severally liable, typically with other companies, for the costs of remediation of environmental contamination at current or former facilities and at off-site locations. The Company has identified numerous locations, most of which are in the United States, at which it may have some liability. Please refer to the section entitled “Environmental Liabilities and Insurance Receivables” that follows for information on the amount of the accrual.

Environmental Matters

As previously reported, the Company has been voluntarily cooperating with ongoing reviews by local, state, federal (primarily the U.S. Environmental Protection Agency (EPA)), and international agencies of possible environmental and health effects of various perfluorinated compounds (“PFCs”), including perfluorooctanyl compounds such as perfluorooctanoate (“PFOA”) and perfluorooctane sulfonate (“PFOS”). As a result of its phase-out decision in May 2000, the Company no longer manufactures perfluorooctanyl compounds. The company ceased manufacturing and using the vast majority of these compounds within approximately two years of the phase-out announcement, and ceased all manufacturing and the last significant use of this chemistry by the end of 2008. Through its ongoing life cycle management and its raw material composition identification processes associated with the Company’s policies covering the use of all persistent and bio-accumulative materials, the Company has on occasion identified the presence of precursor chemicals in materials received from suppliers that may ultimately degrade to PFOA, PFOS, or similar compounds. Upon such identification, the Company works to find alternatives for such materials.

Regulatory activities concerning PFOA and/or PFOS continue in the United States, Europe and elsewhere, and before certain international bodies. These activities include gathering of exposure and use information, risk assessment, and consideration of regulatory approaches. As the database of studies of both chemicals has expanded, the EPA has developed draft human health effects documents summarizing the available data from these studies. In February 2014, the EPA initiated external peer review of its draft human health effects documents for PFOA and PFOS. The peer review panel met in August 2014. The EPA has stated that following the peer review process it will revise its health effects documents and use them to establish lifetime health advisories for PFOS and PFOA in drinking water. Lifetime health advisories, while not enforceable, serve as guidance and are benchmarks for determining if concentrations of chemicals in tap water from public utilities are safe for public consumption. Once finalized, the EPA stated that the lifetime health advisories are expected to supersede the provisional health advisories for PFOA and PFOS in drinking water issued by the EPA in 2009 — currently at 0.4 micrograms per liter for PFOA and 0.2 micrograms per liter for PFOS. In an effort to collect exposure information under the Safe Drinking Water Act, the EPA published on May 2, 2012 a list of unregulated substances, including six PFCs, required to be monitored during the period 2013-2015 by public water system supplies to determine the extent of their occurrence. The EPA is reporting results from this exercise on a rolling basis that will continue in 2016. Through year-end 2015, the EPA has reported results for 4,764 public water supplies nationwide. None of these have reported PFOA above the provisional health advisory level issued by the EPA in 2009, and seventeen have reported PFOS levels above the 2009 provisional health advisory.

The Company is continuing to make progress in its work, under the supervision of state regulators, to address its historic disposal of PFC-containing waste associated with manufacturing operations at the Decatur, Alabama, Cottage Grove, Minnesota, and Cordova, Illinois plants.

As previously reported, the Company entered into a voluntary remedial action agreement with the Alabama Department of Environmental Management (ADEM) to address the presence of PFCs in the soil at the Company’s manufacturing facility in Decatur, Alabama. Pursuant to a permit issued by ADEM, for approximately twenty years, the Company incorporated its wastewater treatment plant sludge containing PFCs in fields at its Decatur facility. After a review of the available options to address the presence of PFCs in the soil, ADEM agreed that the preferred remediation option is to use a multilayer cap over the former sludge incorporation areas on the manufacturing site with subsequent groundwater migration controls and treatment. Implementation of that option will continue and is expected to be completed in 2018.

The Company continues to work with the Minnesota Pollution Control Agency (MPCA) pursuant to the terms of the previously disclosed May 2007 Settlement Agreement and Consent Order to address the presence of certain PFCs in the soil and groundwater at former disposal sites in Washington County, Minnesota (Oakdale and Woodbury) and at the Company’s manufacturing facility at Cottage Grove, Minnesota. Under this agreement, the Company’s principal obligations include (i) evaluating releases of certain PFCs from these sites and proposing response actions; (ii) providing treatment or alternative drinking water upon identifying any level exceeding a Health Based Value (“HBV”) or Health Risk Limit (“HRL”) (i.e., the amount of a chemical in drinking water determined by the Minnesota Department of Health (MDH) to be safe for human consumption over a lifetime) for certain PFCs  for which a HBV and/or HRL exists as a result of contamination from these sites; (iii) remediating identified sources of other PFCs at these sites that are not controlled by actions to remediate PFOA and PFOS; and (iv) sharing information with the MPCA about certain perfluorinated compounds. During 2008, the MPCA issued formal decisions adopting remedial options for the former disposal sites in Washington County, Minnesota (Oakdale and Woodbury). In August 2009, the MPCA issued a formal decision adopting remedial options for the Company’s Cottage Grove manufacturing facility. During the spring and summer of 2010, 3M began implementing the agreed upon remedial options at the Cottage Grove and Woodbury sites. 3M commenced the remedial option at the Oakdale site in late 2010. At each location the remedial options were recommended by the Company and approved by the MPCA. Remediation work has been completed at the Oakdale and Woodbury sites, and they are in an operational maintenance mode. Remediation will continue at the Cottage Grove site during 2016.

In August 2014, the Illinois EPA approved a request by the Company to establish a groundwater management zone at its manufacturing facility in Cordova, Illinois, which includes ongoing pumping of impacted site groundwater, groundwater monitoring and routine reporting of results.

The Company cannot predict what additional regulatory actions arising from the foregoing proceedings and activities, if any, may be taken regarding such compounds or the consequences of any such actions.

Environmental Litigation

As previously reported, a former employee filed a purported class action lawsuit in 2002 in the Circuit Court of Morgan County, Alabama (the “St. John” case), seeking unstated damages and alleging that the plaintiffs suffered fear, increased risk, subclinical injuries, and property damage from exposure to certain perfluorochemicals at or near the Company’s Decatur, Alabama, manufacturing facility. The court in 2005 granted the Company’s motion to dismiss the named plaintiff’s personal injury-related claims on the basis that such claims are barred by the exclusivity provisions of the state’s Workers Compensation Act. The plaintiffs’ counsel filed an amended complaint in November 2006, limiting the case to property damage claims on behalf of a purported class of residents and property owners in the vicinity of the Decatur plant.In June 2015, the plaintiffs filed an amended complaint adding additional defendants, including BFI Waste Management Systems of Alabama, LLC; BFI Waste Management of North America, LLC; the City of Decatur, Alabama; Morgan County, Alabama; Municipal Utilities Board of Decatur; and Morgan County, Alabama, d/b/a Decatur Utilities. In September 2015, the court issued a scheduling order staying discovery pending mediation which occurred in January 2016, but did not resolve the case. Discovery relating to the class certification will begin, and the class certification hearing is scheduled for November 2016.

In 2005, the judge in a second purported class action lawsuit filed by three residents of Morgan County, Alabama, seeking unstated compensatory and punitive damages involving alleged damage to their property from emissions of certain perfluorochemical compounds from the Company’s Decatur, Alabama, manufacturing facility that formerly manufactured those compounds (the “Chandler” case) granted the Company’s motion to abate the case, effectively putting the case on hold pending the resolution of class certification issues in the St. John case. Despite the stay, plaintiffs filed an amended complaint seeking damages for alleged personal injuries and property damage on behalf of the named plaintiffs and the members of a purported class. No further action in the case is expected unless and until the stay is lifted.

In February 2009, a resident of Franklin County, Alabama, filed a purported class action lawsuit in the Circuit Court of Franklin County (the “Stover” case) seeking compensatory damages and injunctive relief based on the application by the Decatur utility’s wastewater treatment plant of wastewater treatment sludge to farmland and grasslands in the state that allegedly contain PFOA, PFOS and other perfluorochemicals. The named plaintiff seeks to represent a class of all persons within the State of Alabama who have had PFOA, PFOS, and other perfluorochemicals released or deposited on their property. In March 2010, the Alabama Supreme Court ordered the case transferred from Franklin County to Morgan County. In May 2010, consistent with its handling of the other matters, the Morgan County Circuit Court abated this case, putting it on hold pending the resolution of the class certification issues in the St. John case.

In October 2015, West Morgan-East Lawrence Water & Sewer Authority (“Water Authority”) filed an individual complaint against 3M Company, Dyneon, L.L.C, and Daikin America, Inc., in the U.S. District Court for the Northern District of Alabama.  The complaint also includes representative plaintiffs who brought the complaint on behalf of themselves, and a class of all owners and possessors of property who use water provided by the Water Authority and five local water works to which the Water Authority supplies water (collectively, the “Water Utilities”).  The complaint seeks compensatory and punitive damages and injunctive relief based on allegations that the defendants’ chemicals, including PFOA and PFOS from their manufacturing processes in Decatur, have contaminated the water in the Tennessee River at the water intake, and that the chemicals cannot be removed by the water treatment processes utilized by the Water Authority.

In December 2010, the State of Minnesota, by its Attorney General Lori Swanson, acting in its capacity as trustee of the natural resources of the State of Minnesota, filed a lawsuit in Hennepin County District Court against 3M to recover damages (including unspecified assessment costs and reasonable attorney’s fees) for alleged injury to, destruction of, and loss of use of certain of the State’s natural resources under the Minnesota Environmental Response and Liability Act (MERLA) and the Minnesota Water Pollution Control Act (MWPCA), as well as statutory nuisance and common law claims of trespass, nuisance, and negligence with respect to the presence of PFCs in the groundwater, surface water, fish or other aquatic life, and sediments (the “NRD Lawsuit”). The State also seeks declarations under MERLA that 3M is responsible for all damages the State may suffer in the future for injuries to natural resources from releases of PFCs into the environment, and under MWPCA that 3M is responsible for compensation for future loss or destruction of fish, aquatic life, and other damages.

In November 2011, the Metropolitan Council filed a motion to intervene and a complaint in the NRD Lawsuit seeking compensatory damages and other legal, declaratory and equitable relief, including reasonable attorneys’ fees, for costs and fees that the Metropolitan Council alleges it will be required to assess at some time in the future if the MPCA imposes restrictions on Metropolitan Council’s PFOS discharges to the Mississippi River, including the installation and maintenance of a water treatment system. The Metropolitan Council’s intervention motion was based on several theories, including common law negligence, and statutory claims under MERLA for response costs, and under the Minnesota Environmental Rights Act (MERA) for declaratory and equitable relief against 3M for PFOS and other PFC pollution of the waters and sediments of the Mississippi River. 3M did not object to the motion to intervene. In January 2012, 3M answered the Metropolitan Council’s complaint and filed a counterclaim alleging that the Metropolitan Council discharges PFCs to the Mississippi River and discharges PFC-containing sludge and bio solids from one or more of its wastewater treatment plants onto agricultural lands and local area landfills. Accordingly, 3M requested that if the court finds that the State is entitled to any of the damages the State seeks, 3M seeks contribution and apportionment from the Metropolitan Council, including attorneys’ fees, under MERLA, and contribution from and liability for the Metropolitan Council’s proportional share of damages awarded to the State under the MWPCA, as well as under statutory nuisance and common law theories of trespass, nuisance, and negligence. 3M also seeks declaratory relief under MERA.

In April 2012, 3M filed a motion to disqualify the State of Minnesota’s counsel, Covington & Burling, LLP (Covington). In October 2012, the court granted 3M’s motion to disqualify Covington as counsel to the State and the State and Covington appealed the court’s disqualification to the Minnesota Court of Appeals. In July 2013, the Minnesota Court of Appeals affirmed the district court’s disqualification order. In October 2013, the Minnesota Supreme Court granted both the State’s and Covington’s petition for review of the decision of the Minnesota Court of Appeals. In April 2014, the Minnesota Supreme Court affirmed in part, reversed in part, and remanded the case to the district court for further proceedings. The district court took evidence on the disqualification issues at a hearing in October 2015. In February 2016, the district court ruled that Covington violated the professional ethics rule against representing a client (here the State of Minnesota) in the same or substantially related matter where that person’s interests are materially adverse to the interests of a former client (3M). The district court, however, denied 3M’s motion to disqualify Covington because it further found that 3M impliedly waived by delaying to assert the conflict. 3M is reviewing the district court’s opinion to determine next steps. Other activity in the case had been stayed pending the outcome of the disqualification issue. In a separate but related action, the Company filed suit against Covington for breach of its fiduciary duties to the Company and for breach of contract arising out of Covington’s representation of the State of Minnesota in the NRD Lawsuit.

For environmental litigation matters described in this section for which a liability, if any, has been recorded, the Company believes the amount recorded, as well as the possible loss or range of loss in excess of the established accrual is not material to the Company’s consolidated results of operations or financial condition. For those matters for which a liability has not been recorded, the Company believes any such liability is not probable and estimable and the Company is not able to estimate a possible loss or range of loss at this time.

Environmental Liabilities and Insurance Receivables

As of December 31, 2015, the Company had recorded liabilities of $43 million for estimated “environmental remediation” costs based upon an evaluation of currently available facts with respect to each individual site and also recorded related insurance receivables of $11 million. The Company records liabilities for remediation costs on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies or the Company’s commitment to a plan of action. Liabilities for estimated costs of environmental remediation, depending on the site, are based primarily upon internal or third-party environmental studies, and estimates as to the number, participation level and financial viability of any other potentially responsible parties, the extent of the contamination and the nature of required remedial actions. The Company adjusts recorded liabilities as further information develops or circumstances change. The Company expects that it will pay the amounts recorded over the periods of remediation for the applicable sites, currently ranging up to 20 years.

As of December 31, 2015, the Company had recorded liabilities of $35 million for “other environmental liabilities” based upon an evaluation of currently available facts to implement the Settlement Agreement and Consent Order with the MPCA, the remedial action agreement with ADEM, and to address trace amounts of perfluorinated compounds in drinking water sources in the City of Oakdale, Minnesota, as well as presence in the soil and groundwater at the Company’s manufacturing facilities in Decatur, Alabama, and Cottage Grove, Minnesota, and at two former disposal sites in Washington County, Minnesota (Oakdale and Woodbury). The Company expects that most of the spending will occur over the next four years. As of December 31, 2015, the Company’s receivable for insurance recoveries related to “other environmental liabilities” was $15 million.

It is difficult to estimate the cost of environmental compliance and remediation given the uncertainties regarding the interpretation and enforcement of applicable environmental laws and regulations, the extent of environmental contamination and the existence of alternative cleanup methods. Developments may occur that could affect the Company’s current assessment, including, but not limited to: (i) changes in the information available regarding the environmental impact of the Company’s operations and products; (ii) changes in environmental regulations, changes in permissible levels of specific compounds in drinking water sources, or changes in enforcement theories and policies, including efforts to recover natural resource damages; (iii) new and evolving analytical and remediation techniques; (iv) success in allocating liability to other potentially responsible parties; and (v) the financial viability of other potentially responsible parties and third-party indemnitors. For sites included in both “environmental remediation liabilities” and “other environmental liabilities,” at which remediation activity is largely complete and remaining activity relates primarily to operation and maintenance of the remedy, including required post-remediation monitoring, the Company believes the exposure to loss in excess of the amount accrued would not be material to the Company’s consolidated results of operations or financial condition. However, for locations at which remediation activity is largely ongoing, the Company cannot estimate a possible loss or range of loss in excess of the associated established accruals for the reasons described above.

Other Matters

Commercial Litigation

3M sued TransWeb Corporation in Minnesota in 2010 for infringement of several 3M patents covering fluorination and hydrocharging of filter media used in 3M’s respirators and furnace filters. TransWeb filed a declaratory judgment action in and successfully moved the litigation to the U.S. District Court for the District of New Jersey, seeking a declaration of invalidity and non-infringement of 3M’s patents, and further alleging that 3M waited too long to enforce its rights. TransWeb also alleged 3M obtained the patents through inequitable conduct and that 3M’s attempt to enforce the patents constituted a violation of the antitrust laws. In November 2012, a jury returned a verdict in favor of TransWeb on all but one count, including findings that 3M’s patents were invalid and not infringed, and that 3M had committed an antitrust violation by seeking to enforce a patent it had obtained fraudulently. The jury also recommended that the court find 3M had committed inequitable conduct in obtaining the patents, and that the patents were therefore unenforceable. Since the vast majority of TransWeb’s claim for treble antitrust damages was in the form of its attorneys’ fees and expenses in connection with the defense of the patent case, the parties agreed that the measure of damages would not go to the jury, but rather would be submitted to a special master after the trial.  In April, 2014, the court issued an order denying 3M’s motions to set aside the jury’s verdict. In addition, the court found two 3M patents unenforceable due to inequitable conduct. The court accepted the special master’s recommendation as to the amount of attorneys’ fees to be awarded as damages, and entered judgment against 3M in the amount of approximately $26 million. In July 2014, 3M filed a notice of appeal of the judgment to the U.S. Court of Appeals for the Federal Circuit. On February 10, 2016, the U.S. Court of Appeals for the Federal Circuit issued its decision affirming the lower court’s judgment. 3M is reviewing the appellate court’s decision to determine next steps. The impact of the appellate court’s decision is not material to the Company’s consolidated results of operations or financial condition.

Product Liability Litigation

Électricité de France (EDF) filed a lawsuit against 3M France in the French courts in 2006 claiming commercial loss and property damage after experiencing electrical network failures which EDF claims were caused by allegedly defective 3M transition splices. The French Court of Appeals at Versailles affirmed the commercial trial court’s decision that the transition splices conformed to contract specifications and that EDF thoroughly analyzed and tested the splices before purchase and installation. The Court of Appeals, however, ordered a court-appointed expert to study the problem and issue a technical opinion on the cause of the network failures. The court-appointed expert submitted his report to the commercial court in May 2014. The expert found potential defects in 3M’s product and found that EDF incurred damages in excess of 100 million Euros. The expert’s opinion is not dispositive of liability or damages and is subject to numerous factual and legal challenges that will be raised with the court. The parties are briefing the court on their respective positions. Once the briefing is complete, the commercial court may take from six months to one year to render its decision.

One customer obtained an order in the French courts against 3M Purification SAS (a French subsidiary) in October 2011 appointing an expert to determine the amount of commercial loss and property damage allegedly caused by allegedly defective 3M filters used in the customer’s manufacturing process. An Austrian subsidiary of this same customer also filed a claim against 3M Austria GmbH (an Austrian subsidiary) and 3M Purification SAS in the Austrian courts in September 2012 seeking damages for the same issue. Those two cases are still pending. Another customer filed a lawsuit against 3M Deutschland GmbH (a German subsidiary) in the German courts in March 2012 seeking commercial loss and property damage allegedly caused by the same 3M filters used in that customer’s manufacturing process; the Company has resolved the claims in the German litigation. The Company has also settled without litigation the claims of two other customers arising out of the same issue. The amounts paid are not material to the Company’s consolidated results of operations or financial condition.

As of December 31, 2015, the Company is a named defendant in 122 lawsuits, most of which are pending in federal or state court in Minnesota, in which the plaintiffs claim they underwent various joint arthroplasty, cardiovascular, and other surgeries and later developed surgical site infections due to the use of the Bair Hugger™ patient warming system.  The U.S. Judicial Panel on Multidistrict Litigation granted the plaintiffs’ motion to transfer and consolidate all cases pending in federal courts to the U.S. District Court for the District of Minnesota to be managed in a multi-district proceeding during the pre-trial phase of the litigation.

The Bair Hugger™ product line was acquired by 3M as part of the 2010 acquisition of Arizant, Inc., a leadingmanufacturer of patient warming solutions designed to prevent hypothermia and maintain normal body temperature in surgical settings. No liability has been recorded for this matter because the Company believes that any such liability is not probable and estimable at this time.

For product liability litigation matters described in this section for which a liability has been recorded, the Company believes the amount recorded is not material to the Company’s consolidated results of operations or financial condition. In addition, the Company is not able to estimate a possible loss or range of loss in excess of the established accruals at this time.

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Stock-Based Compensation

12 Months Ended

Dec. 31, 2015

Stock-Based Compensation

Stock-Based Compensation

NOTE 15. Stock-Based Compensation

The 3M 2008 Long-Term Incentive Plan provides for the issuance or delivery of up to 100 million shares of 3M common stock (including additional shareholder approvals subsequent to 2008) pursuant to awards granted under the plan. Awards under this plan may be issued in the form of incentive stock options, nonqualified stock options, progressive stock options, stock appreciation rights, restricted stock, restricted stock units, other stock awards, and performance units and performance shares. Awards denominated in shares of common stock other than options and stock appreciation rights, per the 2008 Plan, count against the 100 million share limit as 3.38 shares for every one share covered by such award (for full value awards with grant dates prior to May 11, 2010), as 2.87 shares for every one share covered by such award (for full value awards with grant dates on or after May 11, 2010, and prior to May 8, 2012), or as 3.50 shares for every one share covered by such award (for full value awards with grant dates of May 8, 2012 or later). The remaining total shares available for grant under the 2008 Long Term Incentive Plan Program are 20,328,681 as of December 31, 2015. There were approximately 9,200 participants with outstanding options, restricted stock, or restricted stock units at December 31, 2015.

The Company’s annual stock option and restricted stock unit grant is made in February to provide a strong and immediate link between the performance of individuals during the preceding year and the size of their annual stock compensation grants. The grant to eligible employees uses the closing stock price on the grant date. Accounting rules require recognition of expense under a non-substantive vesting period approach, requiring compensation expense recognition when an employee is eligible to retire. Employees are considered eligible to retire at age 55 and after having completed five years of service. This retiree-eligible population represents 35 percent of the 2015 annual stock-based compensation award expense dollars; therefore, higher stock-based compensation expense is recognized in the first quarter. 3M also has granted progressive (reload) options. These options are nonqualified stock options that were granted to certain participants under the 1997 or 2002 Management Stock Ownership Program, but for which the reload feature was eliminated in 2005 (on a prospective basis only).

In addition to the annual grants, the Company makes other minor grants of stock options, restricted stock units and other stock-based grants. The Company issues cash settled restricted stock units and stock appreciation rights in certain countries. These grants do not result in the issuance of common stock and are considered immaterial by the Company.

Amounts recognized in the financial statements with respect to stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees’ Stock Purchase Plan (GESPP), are provided in the following table. Capitalized stock-based compensation amounts were not material for the years ended 2015,  2014 and 2013.

Stock-Based Compensation Expense

	Years ended December 31
(Millions)	2015		2014		2013
Cost of sales	$	46	$	47	$	27
Selling, general and administrative expenses		185		192		183
Research, development and related expenses		45		41		30
Stock-based compensation expenses	$	276	$	280	$	240
Income tax benefits	$	(87)	$	(79)	$	(71)
Stock-based compensation expenses, net of tax	$	189	$	201	$	169

Stock Option Program

The following table summarizes stock option activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
	Number of	Average		Number of	Average		Number of	Average
	Options	Exercise Price		Options	Exercise Price		Options	Exercise Price
Under option —
January 1	39,235,557	$	90.38	43,938,778	$	83.84	56,565,030	$	80.33
Granted:
Annual	5,529,544		165.91	5,736,183		126.77	6,220,810		101.55
Progressive (Reload)	—		—	—		—	140,447		109.83
Other	—		—	—		—	191		119.62
Exercised	(5,978,382)		83.74	(10,219,261)		82.37	(18,825,218)		79.25
Canceled	(234,274)		128.99	(220,143)		105.11	(162,482)		89.92
December 31	38,552,445	$	102.01	39,235,557	$	90.38	43,938,778	$	83.84
Options exercisable
December 31	27,262,062	$	85.97	27,502,208	$	81.42	32,038,228	$	79.58

Stock options vest over a period from one to three years with the expiration date at 10 years from date of grant. Outstanding options under grant include grants from previous plans. As of December 31, 2015, there was $69 million of compensation expense that has yet to be recognized related to non-vested stock option based awards. This expense is expected to be recognized over the remaining weighted-average vesting period of 21 months. For options outstanding at December 31, 2015, the weighted-average remaining contractual life was 66 months and the aggregate intrinsic value was $1.958 billion. For options exercisable at December 31, 2015, the weighted-average remaining contractual life was 52 months and the aggregate intrinsic value was $1.763 billion.

The total intrinsic values of stock options exercised during 2015,  2014 and 2013 was $465 million, $615 million and $562 million, respectively. Cash received from options exercised during 2015,  2014 and 2013 was $501 million, $842 million and $1.492 billion, respectively. The Company’s actual tax benefits realized for the tax deductions related to the exercise of employee stock options for 2015,  2014 and 2013 was $172 million, $226 million and $208 million, respectively.

The Company does not have a specific policy to repurchase common shares to mitigate the dilutive impact of options; however, the Company has historically made adequate discretionary purchases, based on cash availability, market trends, and other factors, to satisfy stock option exercise activity.

For annual and progressive (reload) options, the weighted average fair value at the date of grant was calculated using the Black-Scholes option-pricing model and the assumptions that follow. As discussed earlier, the progressive (reload) feature was eliminated in 2005, resulting in no activity in the below table for 2014 and thereafter.

Stock Option Assumptions

	Annual									Progressive (Reload)
	2015			2014			2013			2015			2014			2013
Exercise price	$	165.94		$	126.72		$	101.49		$	—		$	—		$	109.84
Risk-free interest rate		1.5	%		1.9	%		1.2	%		—	%		—	%		0.2	%
Dividend yield		2.5	%		2.6	%		2.7	%		—	%		—	%		2.7	%
Volatility		20.1	%		20.8	%		20.0	%		—	%		—	%		16.3	%
Expected life (months)		76			75			75			—			—			12
Black-Scholes fair value	$	23.98		$	19.63		$	13.46		$	—		$	—		$	6.42

Expected volatility is a statistical measure of the amount by which a stock price is expected to fluctuate during a period. For the 2015 annual grant date, the Company estimated the expected volatility based upon the average of the most recent one year volatility, the median of the term of the expected life rolling volatility, the median of the most recent term of the expected life volatility of 3M stock, and the implied volatility on the grant date. The expected term assumption is based on the weighted average of historical grants.

Restricted Stock and Restricted Stock Units

The following table summarizes restricted stock and restricted stock unit activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Number of	Grant Date		Number of	Grant Date		Number of	Grant Date
	Awards	Fair Value		Awards	Fair Value		Awards	Fair Value
Nonvested balance —
As of January 1	2,817,786	$	104.41	3,105,361	$	92.31	3,261,562	$	85.17
Granted
Annual	671,204		165.86	798,615		126.79	946,774		101.57
Other	26,886		156.94	78,252		152.74	44,401		111.19
Vested	(1,010,612)		89.99	(1,100,675)		90.37	(1,100,095)		79.93
Forfeited	(64,176)		118.99	(63,767)		97.23	(47,281)		90.82
As of December 31	2,441,088	$	127.47	2,817,786	$	104.41	3,105,361	$	92.31

As of December 31, 2015, there was $84 million of compensation expense that has yet to be recognized related to non-vested restricted stock and restricted stock units. This expense is expected to be recognized over the remaining weighted-average vesting period of 24 months. The total fair value of restricted stock and restricted stock units that vested during the years ended December 31, 2015,  2014 and 2013 was $166 million, $145 million and $114 million, respectively. The Company’s actual tax benefits realized for the tax deductions related to the vesting of restricted stock and restricted stock units for the years ended December 31, 2015,  2014 and 2013 was $62 million, $54 million and $43 million, respectively.

Restricted stock units granted under the 3M 2008 Long-Term Incentive Plan generally vest three years following the grant date assuming continued employment. Dividend equivalents equal to the dividends payable on the same number of shares of 3M common stock accrue on these restricted stock units during the vesting period, although no dividend equivalents are paid on any of these restricted stock units that are forfeited prior to the vesting date. Dividends are paid out in cash at the vest date on restricted stock units, except for performance shares which do not earn dividends. Since the rights to dividends are forfeitable, there is no impact on basic earnings per share calculations. Weighted average restricted stock unit shares outstanding are included in the computation of diluted earnings per share.

Performance Shares

Instead of restricted stock units, the Company makes annual grants of performance shares to members of its executive management. The 2015 performance criteria for these performance shares (organic volume growth, return on invested capital, free cash flow conversion, and earnings per share growth) were selected because the Company believes that they are important drivers of long-term stockholder value. The number of shares of 3M common stock that could actually be delivered at the end of the three-year performance period may be anywhere from 0% to 200% of each performance share granted, depending on the performance of the Company during such performance period. Non-substantive vesting requires that expense for the performance shares be recognized over one or three years depending on when each individual became a 3M executive. Performance shares do not accrue dividends during the performance period. Therefore, the grant date fair value is determined by reducing the closing stock price on the date of grant by the net present value of dividends during the performance period.

The following table summarizes performance share activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Number of	Grant Date		Number of	Grant Date		Number of	Grant Date
	Awards	Fair Value		Awards	Fair Value		Awards	Fair Value
Undistributed balance —
As of January 1	1,099,752	$	102.65	895,635	$	88.12	1,089,084	$	79.27
Granted	227,798		158.88	305,225		124.89	353,734		96.87
Distributed	(323,938)		83.08	(277,358)		84.74	(507,083)		75.16
Performance change	(106,760)		127.70	212,461		109.74	(6,949)		77.01
Forfeited	(25,660)		125.33	(36,212)		109.44	(33,151)		91.34
As of December 31	871,192	$	120.89	1,099,752	$	102.65	895,635	$	88.12

As of December 31, 2015, there was $17 million of compensation expense that has yet to be recognized related to performance shares. This expense is expected to be recognized over the remaining weighted-average earnings period of 10 months. During the years ended December 31, 2015,  2014 and 2013, the total fair value of performance shares that were distributed were $54 million, $35 million and $52 million, respectively. The Company’s actual tax benefits realized for the tax deductions related to the distribution of performance shares for the years ended December 31, 2015,  2014 and 2013 was $15 million, $11 million and $16 million, respectively.

General Employees’ Stock Purchase Plan (GESPP):

As of December 31, 2015, shareholders have approved 60 million shares for issuance under the Company’s GESPP. Substantially all employees are eligible to participate in the plan. Participants are granted options at 85% of market value at the date of grant. There are no GESPP shares under option at the beginning or end of each year because options are granted on the first business day and exercised on the last business day of the same month.

General Employees’ Stock Purchase Plan

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Shares	Exercise Price		Shares	Exercise Price		Shares	Exercise Price
Options granted	1,007,669	$	133.52	1,073,956	$	118.73	1,259,247	$	93.46
Options exercised	(1,007,669)		133.52	(1,073,956)		118.73	(1,259,247)		93.46
Shares available for grant - December 31	28,104,335			29,112,004			30,185,960

The weighted-average fair value per option granted during 2015,  2014 and 2013 was $23.56,  $20.95 and $16.49, respectively. The fair value of GESPP options was based on the 15% purchase price discount. The Company recognized compensation expense for GESSP options of $24 million in 2015,  $22 million in 2014 and $21 million in 2013.

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Business Segments

12 Months Ended

Dec. 31, 2015

Business Segments

Business Segments

NOTE 16. Business Segments

3M’s businesses are organized, managed and internally grouped into segments based on differences in markets, products, technologies and services. 3M manages its operations in five business segments: Industrial; Safety and Graphics; Health Care; Electronics and Energy; and Consumer. 3M’s five business segments bring together common or related 3M technologies, enhancing the development of innovative products and services and providing for efficient sharing of business resources. Transactions among reportable segments are recorded at cost. 3M is an integrated enterprise characterized by substantial intersegment cooperation, cost allocations and inventory transfers. Therefore, management does not represent that these segments, if operated independently, would report the operating income information shown. The difference between operating income and pre-tax income relates to interest income and interest expense, which are not allocated to business segments.

Effective in the third quarter of 2015, within the Health Care business segment, the Company formed the Oral Care Solutions Division, which combined the former 3M ESPE and 3M Unitek divisions.

Business Segment Products

Business Segment	Major Products
Industrial	Tapes, coated, nonwoven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, filtration products, closure systems for personal hygiene products, acoustic systems products, automotive components, abrasion-resistant films, structural adhesives and paint finishing and detailing products
Safety and Graphics	Personal protection products, traffic safety and security products, commercial graphics systems, commercial cleaning and protection products, floor matting, roofing granules for asphalt shingles, and fall protection products
Health Care	Medical and surgical supplies, skin health and infection prevention products, drug delivery systems, dental and orthodontic products, health information systems and food safety products
Electronics and Energy	Optical films solutions for electronic displays, packaging and interconnection devices, insulating and splicing solutions for the electronics, telecommunications and electrical industries, touch screens and touch monitors, renewable energy component solutions, and infrastructure protection products
Consumer	Sponges, scouring pads, high-performance cloths, consumer and office tapes, repositionable notes, indexing systems, construction and home improvement products, home care products, protective material products, and consumer and office tapes and adhesives

Business Segment Information

	Net Sales						Operating Income
(Millions)	2015		2014		2013		2015		2014		2013
Industrial	$	10,328	$	10,990	$	10,657	$	2,263	$	2,389	$	2,307
Safety and Graphics		5,515		5,732		5,584		1,305		1,296		1,227
Health Care		5,420		5,572		5,334		1,724		1,724		1,672
Electronics and Energy		5,220		5,604		5,393		1,102		1,115		954
Consumer		4,422		4,523		4,435		1,046		995		945
Corporate and Unallocated		1		4		8		(355)		(251)		(321)
Elimination of Dual Credit		(632)		(604)		(540)		(139)		(133)		(118)
Total Company	$	30,274	$	31,821	$	30,871	$	6,946	$	7,135	$	6,666

	Assets						Depreciation & Amortization						Capital Expenditures
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014		2013
Industrial	$	9,203	$	8,508	$	8,833	$	374	$	383	$	373	$	317	$	395	$	511
Safety and Graphics		7,564		4,939		5,122		245		234		255		199		221		207
Health Care		4,403		4,344		4,329		179		181		171		168		169		120
Electronics and Energy		4,815		5,116		5,336		291		271		260		211		232		261
Consumer		2,393		2,434		2,516		108		108		106		124		111		128
Corporate and Unallocated		4,340		5,868		7,168		238		231		206		442		365		438
Total Company	$	32,718	$	31,209	$	33,304	$	1,435	$	1,408	$	1,371	$	1,461	$	1,493	$	1,665

Corporate and unallocated operating income includes a variety of miscellaneous items, such as corporate investment gains and losses, certain derivative gains and losses, certain insurance-related gains and losses, certain litigation and environmental expenses, corporate restructuring charges and certain under- or over-absorbed costs (e.g. pension, stock-based compensation) that the Company may choose not to allocate directly to its business segments. Because this category includes a variety of miscellaneous items, it is subject to fluctuation on a quarterly and annual basis.

3M business segment reporting measures include dual credit to business segments for certain U.S. sales and related operating income. Management evaluates each of its five business segments based on net sales and operating income performance, including dual credit U.S. reporting to further incentivize U.S. sales growth. As a result, 3M provides additional (“dual”) credit to those business segments selling products in the U.S. to an external customer when that segment is not the primary seller of the product. For example, certain respirators are primarily sold by the Personal Safety Division within the Safety and Graphics business segment; however, the Industrial business segment also sells this product to certain customers in its U.S. markets. In this example, the non-primary selling segment (Industrial) would also receive credit for the associated net sales it initiated and the related approximate operating income. The assigned operating income related to dual credit activity may differ from operating income that would result from actual costs associated with such sales. The offset to the dual credit business segment reporting is reflected as a reconciling item entitled “Elimination of Dual Credit,” such that sales and operating income for the U.S. in total are unchanged.

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Geographic Areas

12 Months Ended

Dec. 31, 2015

Geographic Areas Disclosure

Geographic Areas

NOTE 17.  Geographic Areas

Geographic area information is used by the Company as a secondary performance measure to manage its businesses. Export sales and certain income and expense items are generally reported within the geographic area where the final sales to 3M customers are made.

													Property, Plant and
	Net Sales						Operating Income						Equipment - net
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014
United States	$	12,049	$	11,714	$	11,151	$	2,647	$	2,540	$	2,210	$	4,838	$	4,619
Asia Pacific		9,041		9,418		9,047		2,580		2,487		2,386		1,647		1,798
Europe, Middle East and Africa		6,228		7,198		7,085		1,017		1,234		1,168		1,531		1,502
Latin America and Canada		2,982		3,504		3,611		706		867		908		499		570
Other Unallocated		(26)		(13)		(23)		(4)		7		(6)		—		—
Total Company	$	30,274	$	31,821	$	30,871	$	6,946	$	7,135	$	6,666	$	8,515	$	8,489

Asia Pacific included China/Hong Kong net sales to customers of $2.945 billion in 2015, which approached 10 percent of consolidated worldwide sales. China/Hong Kong net property, plant and equipment (PP&E) was $584 million at December 31, 2015.

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Quarterly Data (Unaudited)

12 Months Ended

Dec. 31, 2015

Quarterly Data (Unaudited)

Quarterly Data (Unaudited)

NOTE 18.  Quarterly Data (Unaudited)

(Millions, except per-share amounts)	First		Second		Third		Fourth		Year
2015	Quarter		Quarter		Quarter		Quarter		2015
Net sales	$	7,578	$	7,686	$	7,712	$	7,298	$	30,274
Cost of sales		3,821		3,858		3,877		3,827		15,383
Net income including noncontrolling interest		1,201		1,303		1,298		1,039		4,841
Net income attributable to 3M		1,199		1,300		1,296		1,038		4,833
Earnings per share attributable to 3M common shareholders - basic		1.88		2.06		2.09		1.69		7.72
Earnings per share attributable to 3M common shareholders - diluted		1.85		2.02		2.05		1.66		7.58

(Millions, except per-share amounts)	First		Second		Third		Fourth		Year
2014	Quarter		Quarter		Quarter		Quarter		2014
Net sales	$	7,831	$	8,134	$	8,137	$	7,719	$	31,821
Cost of sales		4,031		4,184		4,205		4,027		16,447
Net income including noncontrolling interest		1,225		1,283		1,311		1,179		4,998
Net income attributable to 3M		1,207		1,267		1,303		1,179		4,956
Earnings per share attributable to 3M common shareholders - basic		1.83		1.94		2.02		1.85		7.63
Earnings per share attributable to 3M common shareholders - diluted		1.79		1.91		1.98		1.81		7.49

Gross profit is calculated as net sales minus cost of sales.

Refer to Note 4 for discussion of “Restructuring Actions”, which reduced diluted earnings per share by $0.14 in the fourth quarter of 2015.

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Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2015

Significant Accounting Policies

Consolidation

Consolidation: 3M is a diversified global manufacturer, technology innovator and marketer of a wide variety of products. All subsidiaries are consolidated. All intercompany transactions are eliminated. As used herein, the term “3M” or “Company” refers to 3M Company and subsidiaries unless the context indicates otherwise.

Basis of Presentation

Basis of presentation: Certain balances relative to prior periods have been reclassified to conform to December 31, 2015 presentation in connection with the following, each of which is further discussed in the indicated section of Note 1:

· Change in method of classification of certain marketable securities previously classified as non-current to current as further discussed in the Marketable securities section; and

· Adoption of Accounting Standards Update (ASU) No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, in the fourth quarter of 2015 on a retrospective basis as further discussed in the New Accounting Pronouncements section.

Foreign Currency Translation

Foreign currency translation: Local currencies generally are considered the functional currencies outside the United States. Assets and liabilities for operations in local-currency environments are translated at month-end exchange rates of the period reported. Income and expense items are translated at month-end exchange rates of each applicable month. Cumulative translation adjustments are recorded as a component of accumulated other comprehensive income (loss) in shareholders’ equity.

Although local currencies are typically considered as the functional currencies outside the United States, under Accounting Standards Codification (ASC) 830, Foreign Currency Matters, the reporting currency of a foreign entity’s parent is assumed to be that entity’s functional currency when the economic environment of a foreign entity is highly inflationary—generally when its cumulative inflation is approximately 100 percent or more for the three years that precede the beginning of a reporting period. 3M has a subsidiary in Venezuela with operating income representing less than 1.0 percent of 3M’s consolidated operating income for 2015. Since January 1, 2010, the financial statements of the Venezuelan subsidiary have been remeasured as if its functional currency were that of its parent.

The Venezuelan government sets official rates of exchange and conditions precedent to purchase foreign currency at these rates with local currency. Such rates and conditions have been and continue to be subject to change. In January 2014, the Venezuelan government announced that the National Center for Foreign Commerce (CENCOEX), had assumed the role with respect to the continuation of the existing official exchange rate, significantly expanded the use of a second currency auction exchange mechanism called the Complementary System for Foreign Currency Acquirement (or SICAD1), and issued exchange regulations indicating the SICAD1 rate of exchange would be used for payments related to international investments. In late March 2014, the Venezuelan government launched a third foreign exchange mechanism, SICAD2, which it later replaced with another foreign currency exchange platform in February 2015 called the Marginal System of Foreign Currency (SIMADI). The SIMADI rate was described as being derived from daily private bidders and buyers exchanging offers through authorized agents. This rate is approved and published by the Venezuelan Central Bank.

The financial statements of 3M’s Venezuelan subsidiary were remeasured utilizing the official CENCOEX (or its predecessor) rate into March 2014, the SICAD1 rate beginning in late March 2014, the SICAD2 rate beginning in June 2014, and the SIMADI rate beginning in February 2015. 3M’s uses of these rates were based upon evaluation of a number of factors including, but not limited to, the exchange rate the Company’s Venezuelan subsidiary may legally use to convert currency, settle transactions or pay dividends; the probability of accessing and obtaining currency by use of a particular rate or mechanism; and the Company’s intent and ability to use a particular exchange mechanism. Other factors notwithstanding, remeasurement impacts of the changes in use of these exchange rates did not have material impacts on 3M’s consolidated results of operations or financial condition.

The Company continues to monitor circumstances relative to its Venezuelan subsidiary. Changes in applicable exchange rates or exchange mechanisms may continue in the future. These changes could impact the rate of exchange applicable to remeasure the Company’s net monetary assets (liabilities) denominated in Venezuelan Bolivars (VEF). As of December 31, 2015, the Company had a balance of net monetary liabilities denominated in VEF of less than 500 million VEF and the CENCOEX, SICAD (formerly SICAD1), and SIMADI exchange rates were approximately 6 VEF, 13 VEF, and 200 VEF per U.S. dollar, respectively.

A need to deconsolidate the Company’s Venezuelan subsidiary’s operations may result from a lack of exchangeability of VEF-denominated cash coupled with an acute degradation in the ability to make key operational decisions due to government regulations in Venezuela. 3M monitors factors such as its ability to access various exchange mechanisms; the impact of government regulations on the Company’s ability to manage its Venezuelan subsidiary’s capital structure, purchasing, product pricing, and labor relations; and the current political and economic situation within Venezuela. Based upon such factors as of December 31, 2015, the Company continues to consolidate its Venezuelan subsidiary. As of December 31, 2015, the balance of intercompany receivables due from this subsidiary and its equity balance are not significant.

Reclassifications

Reclassifications: Certain amounts in the prior years’ consolidated financial statements have been reclassified to conform to the current year presentation.

Use of estimates

Use of estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

Cash and cash equivalents

Cash and cash equivalents: Cash and cash equivalents consist of cash and temporary investments with maturities of three months or less when acquired.

Marketable securities

Marketable securities: Effective December 31, 2015, the Company changed the method of classification of certain securities previously classified as non-current to current. This new method classifies these securities as current or non-current based on the nature of the securities and availability for use in current operations while the prior classification was based on management’s intended holding period, the security’s maturity date and liquidity considerations based on market conditions. The Company believes this method is preferable because it is consistent with how the Company manages its capital structure and liquidity. The prior period balance has been reclassified to conform to the current year presentation:

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adjusted
Marketable securities - current	$	626	$	813	$	1,439
Marketable securities - non-current		828		(813)		15
Total marketable securities	$	1,454	$	—	$	1,454

3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders’ equity. Such an unrealized loss does not reduce net income for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.

Investments

Investments: Investments primarily include equity method, cost method, and available-for-sale equity investments. Available-for-sale investments are recorded at fair value. Unrealized gains and losses relating to investments classified as available-for-sale are recorded as a component of accumulated other comprehensive income (loss) in shareholders’ equity.

Other assets

Other assets: Other assets include deferred income taxes, product and other insurance receivables, the cash surrender value of life insurance policies, and other long-term assets. Investments in life insurance are reported at the amount that could be realized under contract at the balance sheet date, with any changes in cash surrender value or contract value during the period accounted for as an adjustment of premiums paid. Cash outflows and inflows associated with life insurance activity are included in “Purchases of marketable securities and investments” and “Proceeds from maturities and sale of marketable securities and investments,” respectively.

Inventories

Inventories: Inventories are stated at the lower of cost or market, with cost generally determined on a first-in, first-out basis.

Property, plant and equipment

Property, plant and equipment: Property, plant and equipment, including capitalized interest and internal engineering costs, are recorded at cost. Depreciation of property, plant and equipment generally is computed using the straight-line method based on the estimated useful lives of the assets. The estimated useful lives of buildings and improvements primarily range from ten to forty years, with the majority in the range of twenty to forty years. The estimated useful lives of machinery and equipment primarily range from three to fifteen years, with the majority in the range of five to ten years. Fully depreciated assets are retained in property and accumulated depreciation accounts until disposal. Upon disposal, assets and related accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposal, is charged or credited to operations. Property, plant and equipment amounts are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss would be recognized when the carrying amount of an asset exceeds the estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition. The amount of the impairment loss recorded is calculated by the excess of the asset’s carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.

Conditional asset retirement obligations

Conditional asset retirement obligations: A liability is initially recorded at fair value for an asset retirement obligation associated with the retirement of tangible long-lived assets in the period in which it is incurred if a reasonable estimate of fair value can be made. Conditional asset retirement obligations exist for certain long-term assets of the Company. The obligation is initially measured at fair value using expected present value techniques. Over time the liabilities are accreted for the change in their present value and the initial capitalized costs are depreciated over the remaining useful lives of the related assets. The asset retirement obligation liability was $102 million and $96 million at December 31, 2015 and 2014, respectively.

Goodwill

Goodwill: Goodwill is the excess of cost of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized. Goodwill is tested for impairment annually in the fourth quarter of each year, and is tested for impairment between annual tests if an event occurs or circumstances change that would indicate the carrying amount may be impaired. Impairment testing for goodwill is done at a reporting unit level, with all goodwill assigned to a reporting unit. Reporting units are one level below the business segment level, but can be combined when reporting units within the same segment have similar economic characteristics. 3M did not combine any of its reporting units for impairment testing. An impairment loss generally would be recognized when the carrying amount of the reporting unit’s net assets exceeds the estimated fair value of the reporting unit. The estimated fair value of a reporting unit is determined using earnings for the reporting unit multiplied by a price/earnings ratio for comparable industry groups, or by using a discounted cash flow analysis. Companies have the option to first assess qualitative factors to determine whether the fair value of a reporting unit is not “more likely than not” less than its carrying amount, which is commonly referred to as “Step 0”. 3M has chosen not to apply Step 0 for 2015 or prior period annual goodwill assessments.

Intangible assets

Intangible assets: Intangible asset types include customer related, patents, other technology-based, tradenames and other intangible assets acquired from an independent party. Intangible assets with a definite life are amortized over a period ranging from one to twenty years on a systematic and rational basis (generally straight line) that is representative of the asset’s use. The estimated useful lives vary by category, with customer related largely between seven to seventeen years, patents largely between five to thirteen years, other technology-based largely between two to fifteen years, definite lived tradenames largely between three and twenty years, and other intangibles largely between two to ten years. Costs related to internally developed intangible assets, such as patents, are expensed as incurred, primarily in “Research, development and related expenses.”

Intangible assets with a definite life are tested for impairment whenever events or circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss is recognized when the carrying amount of an asset exceeds the estimated undiscounted cash flows used in determining the fair value of the asset. The amount of the impairment loss recorded is calculated by the excess of the asset’s carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.

Intangible assets with an indefinite life, namely certain tradenames, are not amortized. Indefinite-lived intangible assets are tested for impairment annually, and are tested for impairment between annual tests if an event occurs or circumstances change that would indicate that the carrying amount may be impaired. An impairment loss generally would be recognized when the fair value is less than the carrying value of the indefinite-lived intangible asset.

Restructuring actions

Restructuring actions: Restructuring actions generally include significant actions involving employee-related severance charges, contract termination costs, and impairment or accelerated depreciation/amortization of assets associated with such actions. Employee-related severance charges are largely based upon distributed employment policies and substantive severance plans. These charges are reflected in the quarter when the actions are probable and the amounts are estimable, which typically is when management approves the associated actions. Severance amounts for which affected employees were required to render service in order to receive benefits at their termination dates were measured at the date such benefits were communicated to the applicable employees and recognized as expense over the employees’ remaining service periods. Contract termination and other charges primarily reflect costs to terminate a contract before the end of its term (measured at fair value at the time the Company provided notice to the counterparty) or costs that will continue to be incurred under the contract for its remaining term without economic benefit to the Company. Asset impairment charges related to intangible assets and property, plant and equipment reflect the excess of the assets’ carrying values over their fair values.

Revenue (sales) recognition

Revenue (sales) recognition: The Company sells a wide range of products to a diversified base of customers around the world and has no material concentration of credit risk. Revenue is recognized when the risks and rewards of ownership have substantively transferred to customers. This condition normally is met when the product has been delivered or upon performance of services. The Company records estimated reductions to revenue or records expense for customer and distributor incentives, primarily comprised of rebates and free goods, at the time of the initial sale. These sales incentives are accounted for in accordance with ASC 605, Revenue Recognition. The estimated reductions of revenue for rebates are based on the sales terms, historical experience, trend analysis and projected market conditions in the various markets served. Since the Company serves numerous markets, the rebate programs offered vary across businesses, but the most common incentive relates to amounts paid or credited to customers for achieving defined volume levels or growth objectives. Free goods are accounted for as an expense and recorded in cost of sales. Sales, use, value-added and other excise taxes are not recognized in revenue.

The vast majority of 3M’s sales agreements are for standard products and services with customer acceptance occurring upon delivery of the product or performance of the service. However, to a limited extent 3M also enters into agreements that involve multiple elements (such as equipment, installation and service), software, or non-standard terms and conditions.

For non-software multiple-element arrangements, the Company recognizes revenue for delivered elements when they have stand-alone value to the customer, they have been accepted by the customer, and for which there are only customary refund or return rights. Arrangement consideration is allocated to the deliverables by use of the relative selling price method. The selling price used for each deliverable is based on vendor-specific objective evidence (VSOE) if available, third-party evidence (TPE) if VSOE is not available, or estimated selling price if neither VSOE nor TPE is available. Estimated selling price is determined in a manner consistent with that used to establish the price to sell the deliverable on a standalone basis. In addition to the preceding conditions, equipment revenue is not recorded until the installation has been completed if equipment acceptance is dependent upon installation or if installation is essential to the functionality of the equipment. Installation revenues are not recorded until installation has been completed.

For arrangements (or portions of arrangements) falling within software revenue recognition standards and that do not involve significant production, modification, or customization, revenue for each software or software-related element is recognized when the Company has VSOE of the fair value of all of the undelivered elements and applicable criteria have been met for the delivered elements. When the arrangements involve significant production, modification or customization, long-term construction-type accounting involving proportional performance is generally employed.

For prepaid service contracts, sales revenue is recognized on a straight-line basis over the term of the contract, unless historical evidence indicates the costs are incurred on other than a straight-line basis. License fee revenue is recognized as earned, and no revenue is recognized until the inception of the license term.

On occasion, agreements will contain milestones, or 3M will recognize revenue based on proportional performance. For these agreements, and depending on the specifics, 3M may recognize revenue upon completion of a substantive milestone, or in proportion to costs incurred to date compared with the estimate of total costs to be incurred.

Accounts receivable and allowances

Accounts receivable and allowances: Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for bad debts, cash discounts, product returns and various other items. The allowance for doubtful accounts and product returns is based on the best estimate of the amount of probable credit losses in existing accounts receivable and anticipated sales returns. The Company determines the allowances based on historical write-off experience by industry and regional economic data and historical sales returns. The Company reviews the allowance for doubtful accounts monthly. The Company does not have any significant off-balance-sheet credit exposure related to its customers.

Advertising and merchandising

Advertising and merchandising: These costs are charged to operations in the period incurred, and totaled $368 million in 2015,  $407 million in 2014 and $423 million in 2013.

Research, development, and related expenses

Research, development and related expenses: These costs are charged to operations in the period incurred and are shown on a separate line of the Consolidated Statement of Income. Research, development and related expenses totaled $1.763 billion in 2015,  $1.770 billion in 2014 and $1.715 billion in 2013. Research and development expenses, covering basic scientific research and the application of scientific advances in the development of new and improved products and their uses, totaled $1.223 billion in 2015,  $1.193 billion in 2014 and $1.150 billion in 2013. Related expenses primarily include technical support; internally developed patent costs, which include costs and fees incurred to prepare, file, secure and maintain patents; amortization of externally acquired patents and externally acquired in-process research and development; and gains/losses associated with certain corporate approved investments in R&D-related ventures, such as equity method effects and impairments.

Internal-use software

Internal-use software: The Company capitalizes direct costs of services used in the development of internal-use software. Amounts capitalized are amortized over a period of three to seven years, generally on a straight-line basis, unless another systematic and rational basis is more representative of the software’s use. Amounts are reported as a component of either machinery and equipment or capital leases within property, plant and equipment.

Environmental

Environmental: Environmental expenditures relating to existing conditions caused by past operations that do not contribute to current or future revenues are expensed. Reserves for liabilities related to anticipated remediation costs are recorded on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies, the Company’s commitment to a plan of action, or approval by regulatory agencies. Environmental expenditures for capital projects that contribute to current or future operations generally are capitalized and depreciated over their estimated useful lives.

Income taxes

Income taxes: The provision for income taxes is determined using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. The Company records a valuation allowance to reduce its deferred tax assets when uncertainty regarding their realizability exists. As of December 31, 2015 and 2014, the Company had valuation allowances of $31 million and $22 million on its deferred tax assets, respectively.

Earnings Per Share

Earnings per share: The difference in the weighted average 3M shares outstanding for calculating basic and diluted earnings per share attributable to 3M common shareholders is the result of the dilution associated with the Company’s stock-based compensation plans. Certain options outstanding under these stock-based compensation plans during the years 2015,  2014 and 2013 were not included in the computation of diluted earnings per share attributable to 3M common shareholders because they would not have had a dilutive effect (5.0 million average options for 2015,  1.4 million average options for 2014, and 2.0 million average options for 2013). The computations for basic and diluted earnings per share for the years ended December 31 follow:

Earnings Per Share Computations

(Amounts in millions, except per share amounts)	2015		2014		2013
Numerator:
Net income attributable to 3M	$	4,833	$	4,956	$	4,659
Denominator:
Denominator for weighted average 3M common shares outstanding — basic		625.6		649.2		681.9
Dilution associated with the Company’s stock-based compensation plans		11.6		12.8		11.7
Denominator for weighted average 3M common shares outstanding — diluted		637.2		662.0		693.6
Earnings per share attributable to 3M common shareholders — basic	$	7.72	$	7.63	$	6.83
Earnings per share attributable to 3M common shareholders — diluted	$	7.58	$	7.49	$	6.72

Stock-based compensation

Stock-based compensation: The Company recognizes compensation expense for its stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees’ Stock Purchase Plan (GESPP). Under applicable accounting standards, the fair value of share-based compensation is determined at the grant date and the recognition of the related expense is recorded over the period in which the share-based compensation vests. Refer to Note 15 for additional information.

Comprehensive income

Comprehensive income: Total comprehensive income and the components of accumulated other comprehensive income (loss) are presented in the Consolidated Statement of Comprehensive Income and the Consolidated Statement of Changes in Equity. Accumulated other comprehensive income (loss) is composed of foreign currency translation effects (including hedges of net investments in international companies), defined benefit pension and postretirement plan adjustments, unrealized gains and losses on available-for-sale debt and equity securities, and unrealized gains and losses on cash flow hedging instruments.

Derivatives and hedging activities

Derivatives and hedging activities: All derivative instruments within the scope of ASC 815, Derivatives and Hedging, are recorded on the balance sheet at fair value. The Company uses interest rate swaps, currency and commodity price swaps, and foreign currency forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity market volatility. All hedging instruments that qualify for hedge accounting are designated and effective as hedges, in accordance with U.S. generally accepted accounting principles. If the underlying hedged transaction ceases to exist, all changes in fair value of the related derivatives that have not been settled are recognized in current earnings. Instruments that do not qualify for hedge accounting are marked to market with changes recognized in current earnings. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the items subject to designated hedge or undesignated (economic) hedge relationships. The Company does not hold or issue derivative financial instruments for trading purposes and is not a party to leveraged derivatives.

Credit risk

Credit risk: The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company’s risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. The Company does not anticipate nonperformance by any of these counterparties. 3M has elected to present the fair value of derivative assets and liabilities within the Company’s consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation.

Fair value measurements

Fair value measurements: 3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Acquisitions

Acquisitions: The Company accounts for business acquisitions in accordance with ASC 805, Business Combinations.  This standard requires the acquiring entity in a business combination to recognize all (and only) the assets acquired and liabilities assumed in the transaction and establishes the acquisition-date fair value as the measurement objective for all assets acquired and liabilities assumed in a business combination. Certain provisions of this standard prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.

New Accounting Pronouncements

New Accounting Pronouncements

In April 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changed the criteria for determining which disposals can be presented as discontinued operations and modified related disclosure requirements. This standard has the impact of reducing the frequency of disposals reported as discontinued operations, by requiring such a disposal to represent a strategic shift that has or will have a major effect on an entity’s operations and financial results. However, existing provisions that prohibited an entity from reporting a discontinued operation if it had certain continuing cash flows or involvement with the component after disposal were eliminated by this standard. The ASU also expands the disclosures for discontinued operations and requires new disclosures related to individually significant disposals that do not qualify as discontinued operations. For 3M, this ASU was effective prospectively beginning January 1, 2015. This ASU was applied to the 2015 divestiture information discussed in Note 2 and had no material impact on consolidated results of operations and financial condition.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, and in August 2015 issued ASU No. 2015-14, which amended ASU No. 2014-09 as to effective date. The ASU, as amended, provides a single comprehensive model to be used in the accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The standard’s stated core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this core principle the ASU includes provisions within a five step model that includes identifying the contract with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations, and recognizing revenue when (or as) an entity satisfies a performance obligation. The standard also specifies the accounting for some costs to obtain or fulfill a contract with a customer and requires expanded disclosures about revenue recognition. The standard provides for either full retrospective adoption or a modified retrospective adoption by which it is applied only to the most current period presented. For 3M, the ASU, as amended, is effective January 1, 2018. The Company is currently assessing this standard’s impact on 3M’s consolidated results of operations and financial condition.

In February 2015, the FASB issued ASU No. 2015-02, Amendments to the Consolidation Analysis, which changes guidance related to both the variable interest entity (VIE) and voting interest entity (VOE) consolidation models. With respect to the VIE model, the standard changes, among other things, the identification of variable interests associated with fees paid to a decision maker or service provider, the VIE characteristics for a limited partner or similar entity, and the primary beneficiary determination. With respect to the VOE model, the ASU eliminates the presumption that a general partner controls a limited partnership or similar entity unless the presumption can otherwise be overcome. Under the new guidance, a general partner would largely not consolidate a partnership or similar entity under the VOE model. For 3M, this ASU is effective January 1, 2016, with early adoption permitted. 3M does not have significant involvement with entities subject to consolidation considerations impacted by the VIE model changes or with limited partnerships potentially impacted by the VOE model changes. As a result, 3M does not expect this ASU to have a material impact on the Company’s consolidated results of operations and financial condition.

In April 2015, the FASB issued ASU No. 2015-03, Simplifying the Presentation of Debt Issuance Costs, and in August 2015 issued ASU No. 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements. Under ASU 2015-03, debt issuance costs reported on the consolidated balance sheet would be reflected as a direct deduction from the related debt liability rather than as an asset. While ASU 2015-03 addresses costs related to term debt, ASU No. 2015-15 provides clarification regarding costs to secure revolving lines of credit, which are, at the outset, not associated with an outstanding borrowing. ASU No. 2015-15 provides commentary that the SEC staff would not object to an entity deferring and presenting costs associated with line-of-credit arrangements as an asset and subsequently amortizing them ratably over the term of the revolving debt arrangement. For 3M, ASU No. 2015-03 is effective January 1, 2016, with early adoption permitted. The Company adopted this ASU in the fourth quarter of 2015 with retrospective application to prior periods. As a result, debt issue costs aggregating $26 million previously included within Other Assets have been reflected as reductions in the balances of Long-Term Debt as of December 31, 2014.

In April 2015, the FASB issued ASU No. 2015-05, Customer’s Accounting for Fees Paid in a Cloud Arrangement, which requires a customer to determine whether a cloud computing arrangement contains a software license. If the arrangement contains a software license, the customer would account for fees related to the software license element in a manner consistent with accounting for the acquisition of other acquired software licenses. If the arrangement does not contain a software license, the customer would account for the arrangement as a service contract. An arrangement would contain a software license element if both (1) the customer has the contractual right to take possession of the software at any time during the hosting period without significant penalty and (2) it is feasible for the customer to either run the software on its own hardware or contract with another party unrelated to the vendor to host the software. For 3M, this ASU is effective January 1, 2016, with early adoption permitted. The standard provides for adoption either fully retrospectively or prospectively to arrangements entered into, or materially modified, after the effective date. The Company does not expect this ASU to have a material impact on 3M’s consolidated results of operations and financial condition.

In May 2015, the FASB issued ASU No. 2015-07, Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). This standard modifies existing disclosure requirements such that investments for which the practical expedient is used to measure their fair value at net asset value (NAV) would be removed from the fair value hierarchy disclosures. Instead, an entity would be required to include those investments as a reconciling item such that the total fair value amount of investments in the fair value hierarchy disclosure is consistent with the amount on the balance sheet. Changes were also made to the requirements in a sponsor’s employee benefit plan asset disclosures. For 3M, this standard is effective January 1, 2016, with early adoption permitted. The Company adopted this ASU in the fourth quarter of 2015 with retrospective application to prior periods. As a result, Note 11, Pension and Postretirement Benefit Plans, reflects the modified disclosures with respect to applicable plan assets. As this ASU only relates to certain disclosures, it did not impact the Company’s consolidated results of operations and financial condition.

In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory, which modifies existing requirements regarding measuring inventory at the lower of cost or market. Under existing standards, the market amount requires consideration of replacement cost, net realizable value (NRV), and NRV less an approximately normal profit margin. The new ASU replaces market with NRV, defined as estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This eliminates the need to determine and consider replacement cost or NRV less an approximately normal profit margin when measuring inventory. For 3M, this standard is effective prospectively beginning January 1, 2017, with early adoption permitted. The Company is currently assessing this ASU’s impacts on 3M’s consolidated results of operations and financial condition.

In September 2015, the FASB issued ASU No. 2015-16, Simplifying the Accounting for Measurement-Period Adjustments, that eliminates the requirement for an acquirer in a business combination to account for measurement-period adjustments retrospectively. Under existing standards, an acquirer in a business combination reports provisional amounts with respect to acquired assets and liabilities when their measurements are incomplete as of the end of the reporting period. Prior to the impact of this ASU, an acquirer is required to adjust provisional amounts (and the related impact on earnings) by restating prior period financial statements during the measurement period which cannot exceed one year from the date of acquisition. The new guidance requires that the cumulative impact of a measurement-period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified—eliminating the requirement to restate prior period financial statements. The new standard requires disclosure of the nature and amount of measurement-period adjustments as well as information with respect to the portion of the adjustments recorded in current-period earnings that would have been recorded in previous reporting periods if the adjustments to provisional amounts had been recognized as of the acquisition date. The ASU is applied prospectively to measurement-period adjustments that occur after the effective date. For 3M, this standard is required prospectively beginning January 1, 2016, with early adoption permitted. The Company adopted this standard with respect to measurement-period adjustments beginning in the fourth quarter of 2015. Additional disclosure, as applicable, is included in Note 2, Acquisitions and Divestitures.

In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes, which requires entities to present deferred tax assets (DTAs) and deferred tax liabilities (DTLs), along with any related valuation allowance, as noncurrent in a balance sheet. This ASU eliminates current guidance requiring deferred taxes for each jurisdiction to be presented as a net current asset or liability and a net noncurrent asset or liability. As a result, each jurisdiction would have one net noncurrent DTA or DTL balance. The ASU does not change the existing requirement that only permits offsetting DTAs and DTLs within a particular jurisdiction. For 3M, this standard is effective January 1, 2017, with early adoption permitted. In light of the process simplification provided by this ASU, the Company adopted this standard in the fourth quarter of 2015 with retrospective application to prior periods. As a result, the December 31, 2014 balances of DTAs and DTLs previously reported were impacted as follows:

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adopted
Prepaid expenses and other (within other current assets)	$	595	$	169	$	764
Other current tax assets (within other current assets)		444		(444)		—
Deferred tax assets (within other assets)		889		241		1,130
Deferred tax liabilities (within other current liabilities)		34		(34)		—

In conjunction with the adoption of this ASU, 3M reclassified $169 million of remaining other current tax assets to prepaid expenses and other to conform to the 2015 presentation.

In January 2016, the FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, which revises the accounting related to (1) the classification and measurement of investments in equity securities and (2) the presentation of certain fair value changes for financial liabilities measured at fair value. The ASU also amends certain disclosure requirements associated with the fair value of financial instruments. The new guidance requires the fair value measurement of investments in equity securities and other ownership interests in an entity, including investments in partnerships, unincorporated joint ventures and limited liability companies (collectively, equity securities) that do not result in consolidation and are not accounted for under the equity method. Entities will need to measure these investments and recognize changes in fair value in net income. Entities will no longer be able to recognize unrealized holding gains and losses on equity securities they classify under current guidance as available for sale in other comprehensive income (OCI). They also will no longer be able to use the cost method of accounting for equity securities that do not have readily determinable fair values. Instead, for these types of equity investments that do not otherwise qualify for the net asset value practical expedient, entities will be permitted to elect a practicability exception and measure the investment at cost less impairment plus or minus observable price changes (in orderly transactions). The ASU also establishes an incremental recognition and disclosure requirement related to the presentation of fair value changes of financial liabilities for which the fair value option (FVO) has been elected. Under this guidance, an entity would be required to separately present in OCI the portion of the total fair value change attributable to instrument-specific credit risk as opposed to reflecting the entire amount in earnings. For derivative liabilities for which the FVO has been elected, however, any changes in fair value attributable to instrument-specific credit risk would continue to be presented in net income, which is consistent with current guidance. For 3M, this standard is effective beginning January 1, 2018 via a cumulative-effect adjustment to beginning retained earnings, except for guidance relative to equity securities without readily determinable fair values which is applied prospectively. The Company is currently assessing this ASU’s impacts on 3M’s consolidated results of operations and financial condition.

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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Earnings per share

Earnings Per Share Computations

(Amounts in millions, except per share amounts)	2015		2014		2013
Numerator:
Net income attributable to 3M	$	4,833	$	4,956	$	4,659
Denominator:
Denominator for weighted average 3M common shares outstanding — basic		625.6		649.2		681.9
Dilution associated with the Company’s stock-based compensation plans		11.6		12.8		11.7
Denominator for weighted average 3M common shares outstanding — diluted		637.2		662.0		693.6
Earnings per share attributable to 3M common shareholders — basic	$	7.72	$	7.63	$	6.83
Earnings per share attributable to 3M common shareholders — diluted	$	7.58	$	7.49	$	6.72

Change in accounting principle marketable securities

Impact on previously reported values after accounting change

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adjusted
Marketable securities - current	$	626	$	813	$	1,439
Marketable securities - non-current		828		(813)		15
Total marketable securities	$	1,454	$	—	$	1,454

ASU 2015-17 Balance sheet classification of deferred taxes

Impact on previously reported values after accounting change

	December 31, 2014
(Millions)	Previously Reported		Impact		As Adopted
Prepaid expenses and other (within other current assets)	$	595	$	169	$	764
Other current tax assets (within other current assets)		444		(444)		—
Deferred tax assets (within other assets)		889		241		1,130
Deferred tax liabilities (within other current liabilities)		34		(34)		—

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Acquisitions (Tables)

12 Months Ended

Dec. 31, 2015

Acquisitions

Allocation of purchase price

	2015 Acquisition Activity
									Finite-Lived
									Intangible-Asset
(Millions)	Capital		Polypore						Weighted-Average
Asset (Liability)	Safety		Separations Media		Other		Total		Lives (Years)
Accounts receivable	$	66	$	30	$	7	$	103
Inventory		63		35		4		102
Other current assets		10		1		1		12
Property, plant, and equipment		36		128		7		171
Purchased finite-lived intangible assets:
Customer related intangible assets		445		270		40		755	16
Patents		44		11		7		62	7
Other technology-based intangible assets		85		42		1		128	7
Definite-lived tradenames		26		6		1		33	16
Other amortizable intangible assets		—		—		2		2	4
Purchased indefinite-lived intangible assets		520		—		—		520
Purchased goodwill		1,764		636		95		2,495
Accounts payable and other liabilities, net of other assets		(105)		(122)		(5)		(232)
Interest bearing debt		(766)		—		—		(766)
Deferred tax asset/(liability)		(464)		—		(7)		(471)
Net assets acquired	$	1,724	$	1,037	$	153	$	2,914
Supplemental information:
Cash paid	$	1,758	$	1,037	$	154	$	2,949
Less: Cash acquired		34		—		1		35
Cash paid, net of cash acquired	$	1,724	$	1,037	$	153	$	2,914

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Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets

Goodwill

	Dec. 31,		2014		2014		Dec. 31,		2015		2015		Dec. 31,
	2013		acquisition		translation		2014		acquisition		translation		2015
(Millions)	Balance		activity		and other		Balance		activity		and other		Balance
Industrial	$	2,166	$	—	$	(129)	$	2,037	$	637	$	(106)	$	2,568
Safety and Graphics		1,740		—		(90)		1,650		1,764		(72)		3,342
Health Care		1,596		65		(72)		1,589		94		(59)		1,624
Electronics and Energy		1,612		—		(53)		1,559		—		(44)		1,515
Consumer		231		—		(16)		215		—		(15)		200
Total Company	$	7,345	$	65	$	(360)	$	7,050	$	2,495	$	(296)	$	9,249

Acquired Intangible Assets

(Millions)	2015		2014
Customer related intangible assets	$	1,973	$	1,348
Patents		616		581
Other technology-based intangible assets		525		407
Definite-lived tradenames		421		401
Other amortizable intangible assets		216		221
Total gross carrying amount	$	3,751	$	2,958
Accumulated amortization — customer related		(668)		(597)
Accumulated amortization — patents		(481)		(472)
Accumulated amortization — other technology based		(252)		(215)
Accumulated amortization — definite-lived tradenames		(215)		(195)
Accumulated amortization — other		(169)		(167)
Total accumulated amortization	$	(1,785)	$	(1,646)
Total finite-lived intangible assets — net	$	1,966	$	1,312
Non-amortizable intangible assets (primarily tradenames)		635		123
Total intangible assets — net	$	2,601	$	1,435

Schedule of amortization expense for acquired intangible assets

Amortization expense for the years ended December 31 follows:

(Millions)	2015		2014		2013
Amortization expense	$	229	$	228	$	236

Schedule of expected amortization expense for acquired amortizable intangible assets

Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2015 follows:

											After
(Millions)	2016		2017		2018		2019		2020		2020
Amortization expense	$	252	$	226	$	205	$	192	$	183	$	908

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Restructuring Actions (Tables)

12 Months Ended

Dec. 31, 2015

Restructuring and Related Activities [Abstract]

Components of restructuring by business segment

Components of these restructuring charges are summarized by business segment as follows:

	Year ended December 31, 2015
(Millions)	Employee-Related		Asset-Related		Total
Industrial	$	30	$	12	$	42
Safety and Graphics		11		—		11
Health Care		9		—		9
Electronics and Energy		8		4		12
Consumer		3		—		3
Corporate and Unallocated		37		—		37
Total Expense	$	98	$	16	$	114

Schedule of restructuring charges by income statement line

The preceding restructuring charges were recorded in the income statement as follows:

(Millions)	2015
Cost of sales		40
Selling, general and administrative expenses		62
Research, development and related expenses		12
Total	$	114

Accrued restructuring action balances

Components of these restructuring actions, including cash and non-cash impacts, follow:

	Year ended December 31, 2015
(Millions)	Employee-Related		Asset-Related		Total
Expense incurred	$	98	$	16	$	114
Non-cash changes		(8)		(16)		(24)
Cash payments		(27)		—		(27)
Accrued 2015 restructuring action balances as of December 31, 2015	$	63	$	—	$	63

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Supplemental Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Balance Sheet Information

Supplemental Balance Sheet Information

(Millions)	2015		2014
Other current assets
Prepaid expenses and other	$	1,081	$	764
Derivative assets-current		211		182
Insurance related receivables, prepaid expenses and other		106		77
Total other current assets	$	1,398	$	1,023
Investments
Equity method	$	56	$	58
Cost method		59		41
Other investments		2		3
Total investments	$	117	$	102
Property, plant and equipment - at cost
Land	$	354	$	368
Buildings and leasehold improvements		7,120		6,943
Machinery and equipment		14,743		14,684
Construction in progress		723		679
Capital leases		158		167
Gross property, plant and equipment		23,098		22,841
Accumulated depreciation		(14,583)		(14,352)
Property, plant and equipment - net	$	8,515	$	8,489
Other assets
Deferred income taxes	$	510	$	1,130
Insurance related receivables and other		49		89
Cash surrender value of life insurance policies		241		245
Other		253		305
Total other assets	$	1,053	$	1,769
Other current liabilities
Accrued trade payables	$	566	$	533
Deferred income		518		541
Derivative liabilities		65		39
Dividends payable		—		648
Employee benefits and withholdings		148		172
Contingent liability claims and other		147		157
Property and other taxes		89		90
Pension and postretirement benefits		60		60
Other		811		644
Total other current liabilities	$	2,404	$	2,884
Other liabilities
Long term income taxes payable	$	154	$	519
Employee benefits		254		262
Contingent liability claims and other		295		300
Capital lease obligations		46		59
Deferred income		19		21
Deferred income taxes		551		141
Other		261		253
Total other liabilities	$	1,580	$	1,555

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Supplemental Equity and Comprehensive Income Information (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Equity and Comprehensive Income Information

Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M

Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M by Component

			Defined Benefit		Debt and		Cash Flow		Accumulated
			Pension and		Equity		Hedging		Other
	Cumulative		Postretirement		Securities,		Instruments,		Comprehensive
	Translation		Plans		Unrealized		Unrealized		Income
(Millions)	Adjustment		Adjustment		Gain (Loss)		Gain (Loss)		(Loss)
Balance at December 31, 2012, net of tax:	$	230	$	(4,955)	$	(2)	$	(23)	$	(4,750)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(462)		1,361		—		(98)		801
Amounts reclassified out		—		569		—		122		691
Total other comprehensive income (loss), before tax		(462)		1,930		—		24		1,492
Tax effect		44		(690)		—		(9)		(655)
Total other comprehensive income (loss), net of tax		(418)		1,240		—		15		837
Balance at December 31, 2013, net of tax:	$	(188)	$	(3,715)	$	(2)	$	(8)	$	(3,913)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(856)		(2,638)		2		171		(3,321)
Amounts reclassified out		—		360		1		(4)		357
Total other comprehensive income (loss), before tax		(856)		(2,278)		3		167		(2,964)
Tax effect		(92)		716		(1)		(60)		563
Total other comprehensive income (loss), net of tax		(948)		(1,562)		2		107		(2,401)
Impact from purchase of subsidiary shares		41		(16)		—		—		25
Balance at December 31, 2014, net of tax	$	(1,095)	$	(5,293)	$	—	$	99	$	(6,289)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		(447)		367		—		212		132
Amounts reclassified out		—		537		—		(174)		363
Total other comprehensive income (loss), before tax		(447)		904		—		38		495
Tax effect		(137)		(415)		—		(13)		(565)
Total other comprehensive income (loss), net of tax		(584)		489		—		25		(70)
Balance at December 31, 2015, net of tax:	$	(1,679)	$	(4,804)	$	—	$	124	$	(6,359)

Reclassifications Out of Accumulated Other Comprehensive Income

Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M

	Amounts Reclassified from
	Accumulated Other Comprehensive Income
(Millions)	Year ended		Year ended		Year ended
Details about Accumulated Other	December 31,		December 31,		December 31,		Location on Income
Comprehensive Income Components	2015		2014		2013		Statement
Gains (losses) associated with, defined benefit pension and postretirement plans amortization
Transition asset	$	1	$	1	$	1	See Note 11
Prior service benefit		79		59		77	See Note 11
Net actuarial loss		(626)		(420)		(647)	See Note 11
Curtailments/Settlements		9		—		—	See Note 11
Total before tax		(537)		(360)		(569)
Tax effect		176		122		197	Provision for income taxes
Net of tax	$	(361)	$	(238)	$	(372)
Debt and equity security gains (losses)
Sales or impairments of securities	$	—	$	(1)	$	—	Selling, general and administrative expenses
Total before tax		—		(1)		—
Tax effect		—		—		—	Provision for income taxes
Net of tax	$	—	$	(1)	$	—
Cash flow hedging instruments gains (losses)
Foreign currency forward/option contracts	$	178	$	3	$	(11)	Cost of sales
Foreign currency forward contracts		—		—		(108)	Interest expense
Commodity price swap contracts		(2)		2		(2)	Cost of sales
Interest rate swap contracts		(2)		(1)		(1)	Interest expense
Total before tax		174		4		(122)
Tax effect		(63)		(1)		45	Provision for income taxes
Net of tax	$	111	$	3	$	(77)
Total reclassifications for the period, net of tax	$	(250)	$	(236)	$	(449)

Effect of purchase of subsidiary shares on equity attributable to 3M Company shareholders

The following table summarizes the effects of these 2014 transactions on equity attributable to 3M Company shareholders:

	Year ended
(Millions)	December 31, 2014
Net income attributable to 3M	$	4,956
Impact of purchase of subsidiary shares		(409)
Change in 3M Company shareholders’ equity from net income
attributable to 3M and impact of purchase of subsidiary shares	$	4,547

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Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements

Supplemental Cash Flow Information

(Millions)	2015		2014		2013
Cash income tax payments, net of refunds	$	2,331	$	1,968	$	1,803
Cash interest payments		134		178		169
Capitalized interest		13		15		21

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Taxes

Income Before Income Taxes

Income Before Income Taxes

(Millions)	2015		2014		2013
United States	$	4,399	$	3,815	$	3,194
International		2,424		3,211		3,368
Total	$	6,823	$	7,026	$	6,562

Provision for Income Taxes

Provision for Income Taxes

(Millions)	2015		2014		2013
Currently payable
Federal	$	1,338	$	1,103	$	948
State		101		108		91
International		566		1,008		901
Deferred
Federal		(55)		(171)		(123)
State		6		(9)		(2)
International		26		(11)		26
Total	$	1,982	$	2,028	$	1,841

Components of Deferred Tax Assets and Liabilities

Components of Deferred Tax Assets and Liabilities

(Millions)	2015		2014
Deferred tax assets:
Accruals not currently deductible
Employee benefit costs	$	175	$	148
Product and other claims		146		152
Miscellaneous accruals		114		137
Pension costs		1,120		1,312
Stock-based compensation		305		290
Net operating/capital loss carryforwards		109		175
Foreign tax credits		25		360
Inventory		46		52
Other		—		30
Gross deferred tax assets		2,040		2,656
Valuation allowance		(31)		(22)
Total deferred tax assets	$	2,009	$	2,634
Deferred tax liabilities:
Product and other insurance receivables	$	(28)	$	(31)
Accelerated depreciation		(736)		(804)
Intangible amortization		(1,017)		(719)
Currency translation		(199)		(91)
Other		(70)		—
Total deferred tax liabilities	$	(2,050)	$	(1,645)
Net deferred tax assets (liabilities)	$	(41)	$	989

Reconciliation of Effective Income Tax Rate

Reconciliation of Effective Income Tax Rate

	2015		2014		2013
Statutory U.S. tax rate	35.0	%	35.0	%	35.0	%
State income taxes - net of federal benefit	1.1		0.9		0.9
International income taxes - net	(3.8)		(5.8)		(6.3)
U.S. research and development credit	(0.5)		(0.4)		(0.7)
Reserves for tax contingencies	(1.0)		0.6		1.2
Domestic Manufacturer’s deduction	(1.8)		(1.3)		(1.6)
All other - net	0.1		(0.1)		(0.4)
Effective worldwide tax rate	29.1	%	28.9	%	28.1	%

Reconciliation of Federal, State and Foreign Tax Gross Unrecognized Tax Benefits

Federal, State and Foreign Tax

(Millions)	2015		2014		2013
Gross UTB Balance at January 1	$	583	$	659	$	528
Additions based on tax positions related to the current year		77		201		97
Additions for tax positions of prior years		140		30		158
Reductions for tax positions of prior years		(399)		(74)		(29)
Settlements		(4)		(154)		(17)
Reductions due to lapse of applicable statute of limitations		(16)		(79)		(78)
Gross UTB Balance at December 31	$	381	$	583	$	659
Net UTB impacting the effective tax rate at December 31	$	369	$	265	$	262

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Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2015

Marketable Securities

Schedule of Marketable Securities

	December 31,		December 31,
(Millions)	2015		2014
U.S. government agency securities	$	—	$	108
Foreign government agency securities		10		95
Corporate debt securities		10		619
Commercial paper		12		—
Certificates of deposit/time deposits		26		41
U.S. treasury securities		—		38
U.S. municipal securities		3		—
Asset-backed securities:
Automobile loan related		26		282
Credit card related		10		162
Equipment lease related		2		48
Other		19		46
Asset-backed securities total		57		538
Current marketable securities	$	118	$	1,439
U.S. municipal securities	$	9	$	15
Non-current marketable securities	$	9	$	15
Total marketable securities	$	127	$	1,454

Marketable securities by contractual maturity

(Millions)	December 31, 2015
Due in one year or less	$	52
Due after one year through five years		74
Due after five years through ten years		1
Due after ten years		—
Total marketable securities	$	127

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Long-Term Debt and Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2015

Long-Term Debt and Short-Term Borrowings

Schedule of Long-Term Debt

Long-Term Debt

	Currency/	Effective		Final
(Millions)	Fixed vs.	Interest		Maturity	Carrying Value
Description / 2015 Principal Amount	Floating	Rate		Date	2015		2014
Medium-term note ($1 billion)	USD Fixed	1.62	%	2016	$	999	$	996
Medium-term note ($650 million)	USD Fixed	1.10	%	2017		648		647
Medium-term note (500 million Euros)	Euro Floating	0.16	%	2018		545		606
Medium-term note ($450 million)	USD Floating	0.44	%	2018		448		—
Medium-term note ($600 million)	USD Floating	0.55	%	2019		597		592
Medium-term note ($25 million)	USD Fixed	1.74	%	2019		25		25
Medium-term note (650 million Euros)	Euro Floating	0.15	%	2020		708		—
Medium-term note ($300 million)	USD Floating	0.61	%	2020		297		—
Medium-term note ($200 million)	USD Fixed	2.12	%	2020		198		—
Eurobond (300 million Euros)	Euro Floating	0.21	%	2021		348		389
Eurobond (300 million Euros)	Euro Fixed	1.97	%	2021		326		361
Medium-term note ($600 million)	USD Fixed	2.17	%	2022		592		591
Medium-term note (600 million Euros)	Euro Fixed	1.14	%	2023		644		—
Medium-term note ($550 million)	USD Fixed	3.04	%	2025		545		—
Medium-term note (750 million Euros)	Euro Fixed	1.71	%	2026		801		892
30-year debenture ($330 million)	USD Fixed	6.01	%	2028		343		344
Medium-term note (500 million Euros)	Euro Fixed	1.90	%	2030		533		—
30-year bond ($750 million)	USD Fixed	5.73	%	2037		743		742
Floating rate note ($96 million)	USD Floating	0.22	%	2041		96		96
Medium-term note ($325 million)	USD Fixed	4.05	%	2044		313		312
Floating rate note ($55 million)	USD Floating	0.16	%	2044		55		55
Other borrowings	Various	0.22	%	2016-2040		74		112
Total long-term debt					$	9,878	$	6,760
Less: current portion of long-term debt						1,125		55
Long-term debt (excluding current portion)					$	8,753	$	6,705

Schedule of Post-Swap Borrowing (Long-Term Debt, Including Current Portion)

Post-Swap Borrowing (Long-Term Debt, Including Current Portion)

	2015				2014
	Carrying		Effective		Carrying		Effective
(Millions)	Value		Interest Rate		Value		Interest Rate
Fixed-rate debt	$	6,712	2.54	%	$	4,911	2.74	%
Floating-rate debt		3,166	0.32	%		1,849	0.53	%
Total long-term debt, including current portion	$	9,878			$	6,760

Schedule of Short-Term Borrowings and Current Portion of Long-Term Debt

Short-Term Borrowings and Current Portion of Long-Term Debt

	Effective		Carrying Value
(Millions)	Interest Rate		2015		2014
Current portion of long-term debt	1.45	%	$	1,125	$	55
U.S. dollar commercial paper	—	%		—		—
Other borrowings	1.01	%		919		51
Total short-term borrowings and current portion of long-term debt			$	2,044	$	106

Schedule of Maturities of Long-Term Debt

Maturities of Long-term Debt

Maturities of long-term debt for the five years subsequent of December 31, 2015 are as follows (in millions):

										After
2016		2017		2018		2019		2020		2020		Total
$	1,125	$	744	$	993	$	622	$	1,203	$	5,191	$	9,878

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Pension and Postretirement Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Defined Benefit Plans and Other Postretirement Benefit Plans

Reconciliation of the beginning and ending balances of the benefit obligation and the fair value of plan assets

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Change in benefit obligation
Benefit obligation at beginning of year	$	16,452	$	13,967	$	6,979	$	6,346	$	2,462	$	2,017
Acquisitions/Transfers in		—		—		94		—		—		—
Service cost		293		241		154		141		75		65
Interest cost		655		676		206		252		98		97
Participant contributions		—		—		9		10		14		18
Foreign exchange rate changes		—		—		(589)		(663)		(22)		(11)
Plan amendments		—		(266)		(6)		3		(211)		—
Actuarial (gain) loss		(657)		2,874		(274)		1,128		(80)		415
Medicare Part D Reimbursement		—		—		—		—		1		1
Benefit payments		(874)		(1,039)		(232)		(235)		(122)		(140)
Settlements, curtailments, special termination benefits and other		(13)		(1)		(19)		(3)		1		—
Benefit obligation at end of year	$	15,856	$	16,452	$	6,322	$	6,979	$	2,216	$	2,462
Change in plan assets
Fair value of plan assets at beginning of year	$	14,643	$	13,889	$	5,957	$	5,758	$	1,436	$	1,405
Acquisitions/Transfers in		—		—		8		—		—		—
Actual return on plan assets		100		1,749		287		813		36		148
Company contributions		113		45		151		165		3		5
Participant contributions		—		—		9		10		14		18
Foreign exchange rate changes		—		—		(498)		(554)		—		—
Benefit payments		(874)		(1,039)		(232)		(235)		(122)		(140)
Settlements, curtailments, special termination benefits and other		(16)		(1)		(13)		—		—		—
Fair value of plan assets at end of year	$	13,966	$	14,643	$	5,669	$	5,957	$	1,367	$	1,436
Funded status at end of year	$	(1,890)	$	(1,809)	$	(653)	$	(1,022)	$	(849)	$	(1,026)

Amounts recognized in the Consolidated Balance Sheet

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Amounts recognized in the Consolidated Balance Sheet as of Dec. 31,
Non-current assets	$	3	$	3	$	185	$	43	$	—	$	—
Accrued benefit cost
Current liabilities		(47)		(46)		(10)		(10)		(3)		(4)
Non-current liabilities		(1,846)		(1,766)		(828)		(1,055)		(846)		(1,022)
Ending balance	$	(1,890)	$	(1,809)	$	(653)	$	(1,022)	$	(849)	$	(1,026)

Amounts recognized in accumulated other comprehensive income

	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Amounts recognized in accumulated other comprehensive income as of Dec. 31,
Net transition obligation (asset)	$	—	$	—	$	(2)	$	(3)	$	—	$	—
Net actuarial loss (gain)		5,366		5,462		1,610		2,200		815		914
Prior service cost (credit)		(227)		(251)		(68)		(93)		(270)		(102)
Ending balance	$	5,139	$	5,211	$	1,540	$	2,104	$	545	$	812

Amounts relating to pension plans with accumulated benefit obligations in excess of plan assets

The following amounts relate to pension plans with accumulated benefit obligations in excess of plan assets as of December 31:

	Qualified and Non-qualified Pension Plans
	United States				International
(Millions)	2015		2014		2015		2014
Projected benefit obligation	$	15,856	$	16,435	$	2,382	$	2,588
Accumulated benefit obligation		14,834		15,319		2,149		2,335
Fair value of plan assets		13,966		14,623		1,566		1,636

Components of net periodic benefit cost (benefit)

Components of net periodic cost and other amounts recognized in other comprehensive income

Net periodic benefit cost is recorded in cost of sales, selling, general and administrative expenses, and research, development and related expenses. Components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for the years ended December 31 follow:

	Qualified and Non-qualified
	Pension Benefits												Postretirement
	United States						International						Benefits
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014		2013
Net periodic benefit cost (benefit)
Service cost	$	293	$	241	$	258	$	154	$	141	$	147	$	75	$	65	$	80
Interest cost		655		676		598		206		252		238		98		97		88
Expected return on plan assets		(1,069)		(1,043)		(1,046)		(308)		(312)		(291)		(91)		(90)		(90)
Amortization of transition (asset) obligation		—		—		—		(1)		(1)		(1)		—		—		—
Amortization of prior service cost (benefit)		(24)		4		5		(13)		(16)		(16)		(42)		(47)		(66)
Amortization of net actuarial (gain) loss		409		243		399		144		121		153		73		56		95
Net periodic benefit cost (benefit)	$	264	$	121	$	214	$	182	$	185	$	230	$	113	$	81	$	107
Settlements, curtailments, special termination benefits and other		2		—		—		(6)		4		2		1		—		—
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	$	266	$	121	$	214	$	176	$	189	$	232	$	114	$	81	$	107
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition (asset) obligation		—		—		—		1		1		1		—		—		—
Prior service cost (benefit)		—		(266)		—		10		3		3		(212)		—		(20)
Amortization of prior service cost (benefit)		24		(4)		(5)		13		16		16		42		47		66
Net actuarial (gain) loss		312		2,167		(743)		(270)		592		(294)		(23)		358		(313)
Amortization of net actuarial (gain) loss		(409)		(243)		(399)		(144)		(121)		(153)		(73)		(56)		(95)
Foreign currency		—		—		—		(174)		(215)		(47)		(1)		(1)		(2)
Total recognized in other comprehensive (income) loss	$	(73)	$	1,654	$	(1,147)	$	(564)	$	276	$	(474)	$	(267)	$	348	$	(364)
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	$	193	$	1,775	$	(933)	$	(388)	$	465	$	(242)	$	(153)	$	429	$	(257)

Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year

Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over the next fiscal year

	Qualified and Non-qualified
	Pension Benefits				Postretirement
(Millions)	United States		International		Benefits
Amortization of transition (asset) obligation	$	—	$	(1)	$	—
Amortization of prior service cost (benefit)		(24)		(13)		(55)
Amortization of net actuarial (gain) loss		354		90		62
Total amortization expected over the next fiscal year	$	330	$	76	$	7

Weighted-average assumptions used to determine benefit obligations and net cost

Weighted-average assumptions used to determine benefit obligations as of December 31

	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Discount rate	4.47	%	4.10	%	4.98	%	3.12	%	3.11	%	4.02	%	4.48	%	4.07	%	4.83	%
Compensation rate increase	4.10	%	4.10	%	4.00	%	2.90	%	3.33	%	3.35	%	N/A		N/A		N/A

Weighted-average assumptions used to determine net cost for years ended December 31

	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Discount rate	4.10	%	4.98	%	4.14	%	3.11	%	4.02	%	3.78	%	4.07	%	4.83	%	4.00	%
Expected return on assets	7.75	%	7.75	%	8.00	%	5.90	%	5.83	%	5.87	%	6.91	%	7.11	%	7.19	%
Compensation rate increase	4.10	%	4.00	%	4.00	%	3.33	%	3.35	%	3.31	%	N/A		N/A		N/A

Estimated future pension and postretirement benefit payments

Future Pension and Postretirement Benefit Payments

The following table provides the estimated pension and postretirement benefit payments that are payable from the plans to participants.

	Qualified and Non-qualified
	Pension Benefits				Postretirement
(Millions)	United States		International		Benefits
2016 Benefit Payments	$	987	$	205	$	141
2017 Benefit Payments		997		215		156
2018 Benefit Payments		1,008		228		172
2019 Benefit Payments		1,017		241		153
2020 Benefit Payments		1,029		250		155
Next five years		5,187		1,480		797

United States Qualified and Non-qualified Pension Benefits

Defined Benefit Plans and Other Postretirement Benefit Plans

Fair values of the assets held by the plans by asset category

The fair values of the assets held by the U.S. pension plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
U.S. equities	$	1,897	$	1,766	$	—	$	—	$	—	$	—	$	1,897	$	1,766
Non-U.S. equities		1,149		1,214		—		—		—		—		1,149		1,214
Index and long/short equity funds*														578		607
Total Equities	$	3,046	$	2,980	$	—	$	—	$	—	$	—	$	3,624	$	3,587
Fixed Income
U.S. government securities	$	1,095	$	1,032	$	456	$	590	$	—	$	—	$	1,551	$	1,622
Non-U.S. government securities		—		7		126		381		—		—		126		388
Preferred and convertible securities		4		6		8		9		—		—		12		15
U.S. corporate bonds		9		8		2,820		2,889		—		—		2,829		2,897
Non-U.S. corporate bonds		—		—		616		566		—		—		616		566
Derivative instruments		(1)		6		40		126		—		—		39		132
Other*														11		32
Total Fixed Income	$	1,107	$	1,059	$	4,066	$	4,561	$	—	$	—	$	5,184	$	5,652
Private Equity
Derivative instruments	$	—	$	—	$	—	$	—	$	(106)	$	(74)	$	(106)	$	(74)
Growth equity		24		15		—		—		—		—		24		15
Partnership investments*														2,450		2,561
Total Private Equity	$	24	$	15	$	—	$	—	$	(106)	$	(74)	$	2,368	$	2,502
Absolute Return
Derivative instruments	$	—	$	—	$	(5)	$	—	$	—	$	—	$	(5)	$	—
Fixed income and other		253		26		46		52		—		—		299		78
Hedge fund/fund of funds*														1,409		1,807
Partnership investments*														355		288
Total Absolute Return	$	253	$	26	$	41	$	52	$	—	$	—	$	2,058	$	2,173
Cash and Cash Equivalents
Cash and cash equivalents	$	102	$	287	$	6	$	86	$	—	$	—	$	108	$	373
Cash and cash equivalents, valued at net asset value*														783		531
Total Cash and Cash Equivalents	$	102	$	287	$	6	$	86	$	—	$	—	$	891	$	904
Total	$	4,532	$	4,367	$	4,113	$	4,699	$	(106)	$	(74)	$	14,125	$	14,818
Other items to reconcile to fair value of plan assets													$	(159)	$	(175)
Fair value of plan assets													$	13,966	$	14,643

International Qualified and Non-qualified Pension Benefits

Defined Benefit Plans and Other Postretirement Benefit Plans

Fair values of the assets held by the plans by asset category

The fair values of the assets held by the international pension plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
Growth equities	$	718	$	672	$	195	$	176	$	—	$	—	$	913	$	848
Value equities		494		595		27		23		—		—		521		618
Core equities		31		19		671		624		4		4		706		647
Equities, valued at net asset value*														17		18
Total Equities	$	1,243	$	1,286	$	893	$	823	$	4	$	4	$	2,157	$	2,131
Fixed Income
Domestic government	$	283	$	87	$	346	$	533	$	4	$	3	$	633	$	623
Foreign government		—		45		206		670		—		—		206		715
Corporate debt securities		30		1		661		701		10		12		701		714
Fixed income securities, valued at net asset value*														770		863
Total Fixed Income	$	313	$	133	$	1,213	$	1,904	$	14	$	15	$	2,310	$	2,915
Private Equity
Real estate	$	1	$	3	$	5	$	5	$	4	$	4	$	10	$	12
Real estate, valued at net asset value*														126		119
Partnership investments*														24		23
Total Private Equity	$	1	$	3	$	5	$	5	$	4	$	4	$	160	$	154
Absolute Return
Derivatives	$	(2)	$	—	$	15	$	(4)	$	—	$	—	$	13	$	(4)
Insurance		—		—		—		—		456		476		456		476
Other		—		—		4		10		3		3		7		13
Other, valued at net asset value*														1		3
Hedge funds*														119		117
Total Absolute Return	$	(2)	$	—	$	19	$	6	$	459	$	479	$	596	$	605
Cash and Cash Equivalents
Cash and cash equivalents	$	126	$	161	$	347	$	29	$	—	$	—	$	473	$	190
Cash and cash equivalents, valued at net asset value*														1		3
Total Cash and Cash Equivalents	$	126	$	161	$	347	$	29	$	—	$	—	$	474	$	193
Total	$	1,681	$	1,583	$	2,477	$	2,767	$	481	$	502	$	5,697	$	5,998
Other items to reconcile to fair value of plan assets													$	(28)	$	(41)
Fair value of plan assets													$	5,669	$	5,957

Postretirement Benefits

Defined Benefit Plans and Other Postretirement Benefit Plans

Fair values of the assets held by the plans by asset category

The fair values of the assets held by the postretirement benefit plans by asset class are as follows:

	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2015		2014		2015		2014		2015		2014		2015		2014
Equities
U.S. equities	$	508	$	565	$	—	$	—	$	—	$	—	$	508	$	565
Non-U.S. equities		59		56		—		—		—		—		59		56
Index and long/short equity funds*														49		55
Total Equities	$	567	$	621	$	—	$	—	$	—	$	—	$	616	$	676
Fixed Income
U.S. government securities	$	71	$	68	$	192	$	186	$	—	$	—	$	263	$	254
Non-U.S. government securities		—		—		8		17		—		—		8		17
U.S. corporate bonds		—		—		153		146		—		—		153		146
Non-U.S. corporate bonds		—		—		35		34		—		—		35		34
Derivative instruments		—		—		2		5		—		—		2		5
Other*														—		1
Total Fixed Income	$	71	$	68	$	390	$	388	$	—	$	—	$	461	$	457
Private Equity
Derivative instruments	$	—	$	—	$	—	$	—	$	(4)	$	(3)	$	(4)	$	(3)
Growth equity		1		1		—		—		—		—		1		1
Partnership investments*														136		162
Total Private Equity	$	1	$	1	$	—	$	—	$	(4)	$	(3)	$	133	$	160
Absolute Return
Fixed income and other	$	10	$	1	$	2	$	2	$	—	$	—	$	12	$	3
Hedge fund/fund of funds*														54		66
Partnership investments*														14		10
Total Absolute Return	$	10	$	1	$	2	$	2	$	—	$	—	$	80	$	79
Cash and Cash Equivalents
Cash and cash equivalents	$	38	$	33	$	—	$	3	$	—	$	—	$	38	$	36
Cash and cash equivalents, valued at net asset value*														30		20
Total Cash and Cash Equivalents	$	38	$	33	$	—	$	3	$	—	$	—	$	68	$	56
Total	$	687	$	724	$	392	$	393	$	(4)	$	(3)	$	1,358	$	1,428
Other items to reconcile to fair value of plan assets													$	9	$	8
Fair value of plan assets													$	1,367	$	1,436

XML

Derivatives (Tables)

12 Months Ended

Dec. 31, 2015

Derivatives

Gain (loss) on derivative instruments designated as cash flow hedges

Year Ended December 31, 2015

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	212	Cost of sales	$	178	Cost of sales	$	—
Commodity price swap contracts		—	Cost of sales		(2)	Cost of sales		—
Interest rate swap contracts		—	Interest expense		(2)	Interest expense		—
Total	$	212		$	174		$	—

Year Ended December 31, 2014

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	183	Cost of sales	$	3	Cost of sales	$	—
Commodity price swap contracts		(4)	Cost of sales		2	Cost of sales		—
Interest rate swap contracts		(8)	Interest expense		(1)	Interest expense		—
Total	$	171		$	4		$	—

Year Ended December 31, 2013

			Pretax Gain (Loss) Recognized in
	Pretax Gain (Loss)		Income on Effective Portion of			Ineffective Portion of Gain
	Recognized in Other		Derivative as a Result of			(Loss) on Derivative and
	Comprehensive		Reclassification from			Amount Excluded from
	Income on Effective		Accumulated Other			Effectiveness Testing
(Millions)	Portion of Derivative		Comprehensive Income			Recognized in Income
Derivatives in Cash Flow Hedging Relationships	Amount		Location	Amount		Location	Amount
Foreign currency forward/option contracts	$	9	Cost of sales	$	(11)	Cost of sales	$	—
Foreign currency forward contracts		(108)	Interest expense		(108)	Interest expense		—
Commodity price swap contracts		1	Cost of sales		(2)	Cost of sales		—
Interest rate swap contracts		—	Interest expense		(1)	Interest expense		—
Total	$	(98)		$	(122)		$	—

Gain (loss) on derivative instruments designated as fair value hedges

Year ended December 31, 2015	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	(2)	Interest expense	$	2
Total		$	(2)		$	2

Year ended December 31, 2014	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	11	Interest expense	$	(11)
Total		$	11		$	(11)

Year ended December 31, 2013	Gain (Loss) on Derivative			Gain (Loss) on Hedged Item
(Millions)	Recognized in Income			Recognized in Income
Derivatives in Fair Value Hedging Relationships	Location	Amount		Location	Amount
Interest rate swap contracts	Interest expense	$	(21)	Interest expense	$	21
Total		$	(21)		$	21

Gain (loss) on derivative and non-derivative instruments designated as net investment hedges

Year ended December 31, 2015

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	63	N/A	$	—
Foreign currency forward contracts		143	Cost of sales		11
Total	$	206		$	11

Year ended December 31, 2014

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	152	N/A	$	—
Foreign currency forward contracts		94	Cost of sales		1
Total	$	246		$	1

Year ended December 31, 2013

	Pretax Gain (Loss)
	Recognized as
	Cumulative Translation
	within Other		Ineffective Portion of Gain (Loss) on
	Comprehensive Income		Instrument and Amount Excluded
Derivative and Nonderivative Instruments in Net Investment Hedging	on Effective Portion of		from Effectiveness Testing
Relationships	Instrument		Recognized in Income
(Millions)	Amount		Location	Amount
Foreign currency denominated debt	$	(82)	N/A	$	—
Foreign currency forward contracts		12	Cost of sales		—
Total	$	(70)		$	—

Gain (loss) on derivative instruments not designated as hedging instruments

The location in the consolidated statements of income and amounts of gains and losses related to derivative instruments not designated as hedging instruments are as follows:

	Gain (Loss) on Derivative Recognized in Income
			Year ended		Year ended		Year ended
			December 31,		December 31,		December 31,
Derivatives Not Designated as Hedging Instruments			2015		2014		2013
(Millions)	Location		Amount		Amount		Amount
Foreign currency forward/option contracts	Cost of sales	$	5	$	10	$	20
Foreign currency forward contracts	Interest expense		(30)		(40)		(43)
Commodity price swap contracts	Cost of sales		(3)		—		(1)
Total		$	(28)	$	(30)	$	(24)

Location and Fair Value of Derivative Instruments

	Gross		Assets			Liabilities
December 31, 2015	Notional			Fair			Fair
(Millions)	Amount		Location	Value Amount		Location	Value Amount
Derivatives designated as
hedging instruments
Foreign currency forward/option contracts	$	2,815	Other current assets	$	148	Other current liabilities	$	14
Foreign currency forward/option contracts		1,240	Other assets		61	Other liabilities		3
Interest rate swap contracts		1,753	Other assets		24	Other liabilities		1
Total derivatives designated as hedging instruments				$	233		$	18
Derivatives not designated as
hedging instruments
Foreign currency forward/option contracts	$	5,359	Other current assets	$	63	Other current liabilities	$	51
Total derivatives not designated as hedging instruments				$	63		$	51
Total derivative instruments				$	296		$	69

	Gross		Assets			Liabilities
December 31, 2014	Notional			Fair			Fair
(Millions)	Amount		Location	Value Amount		Location	Value Amount
Derivatives designated as
hedging instruments
Foreign currency forward/option contracts	$	1,865	Other current assets	$	116	Other current liabilities	$	2
Foreign currency forward/option contracts		656	Other assets		47	Other liabilities		1
Commodity price swap contracts		20	Other current assets		—	Other current liabilities		4
Interest rate swap contracts		1,003	Other assets		27	Other liabilities		3
Total derivatives designated as hedging instruments				$	190		$	10
Derivatives not designated as
hedging instruments
Foreign currency forward/option contracts	$	6,582	Other current assets	$	66	Other current liabilities	$	33
Total derivatives not designated as hedging instruments				$	66		$	33
Total derivative instruments				$	256		$	43

Offsetting Assets

Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties

December 31, 2015			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Assets		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Liabilities		Received		Derivative Assets
Derivatives subject to master netting agreements	$	296	$	37	$	—	$	259
Derivatives not subject to master netting agreements		—						—
Total	$	296					$	259

December 31, 2014			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Assets		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Liabilities		Received		Derivative Assets
Derivatives subject to master netting agreements	$	256	$	20	$	—	$	236
Derivatives not subject to master netting agreements		—						—
Total	$	256					$	236

Offsetting Liabilities

Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties

December 31, 2015			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Liabilities		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Assets		Pledged		Derivative Liabilities
Derivatives subject to master netting agreements	$	64	$	37	$	—	$	27
Derivatives not subject to master netting agreements		5						5
Total	$	69					$	32

December 31, 2014			Gross Amounts not Offset in the
			Consolidated Balance Sheet that are Subject
	Gross Amount of		to Master Netting Agreements
	Derivative Liabilities		Gross Amount of
	Presented in the		Eligible Offsetting
	Consolidated		Recognized		Cash Collateral		Net Amount of
(Millions)	Balance Sheet		Derivative Assets		Pledged		Derivative Liabilities
Derivatives subject to master netting agreements	$	36	$	20	$	—	$	16
Derivatives not subject to master netting agreements		7						7
Total	$	43					$	23

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Measurements

Fair Value, Assets and Liabilities Measured on Recurring Basis

			Fair Value Measurements
(Millions)	Fair Value at		Using Inputs Considered as
Description	December 31, 2015		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
Foreign government agency securities	$	10	$	—	$	10	$	—
Corporate debt securities		10		—		10		—
Commercial paper		12		—		12		—
Certificates of deposit/time deposits		26		—		26		—
Asset-backed securities:
Automobile loan related		26		—		26		—
Credit card related		10		—		10		—
Equipment lease related		2		—		2		—
Other		19		—		19		—
U.S. municipal securities		12		—		—		12
Derivative instruments — assets:
Foreign currency forward/option contracts		272		—		272		—
Interest rate swap contracts		24		—		24		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		68		—		68		—
Interest rate swap contracts		1		—		1		—

			Fair Value Measurements
(Millions)	Fair Value at		Using Inputs Considered as
Description	December 31, 2014		Level 1		Level 2		Level 3
Assets:
Available-for-sale:
Marketable securities:
U.S. government agency securities	$	108	$	—	$	108	$	—
Foreign government agency securities		95		—		95		—
Corporate debt securities		619		—		619		—
Certificates of deposit/time deposits		41		—		41		—
Asset-backed securities:
Automobile loan related		282		—		282		—
Credit card related		162		—		162		—
Equipment lease related		48		—		48		—
Other		46		—		46		—
U.S. treasury securities		38		38		—		—
U.S. municipal securities		15		—		—		15
Investments		1		1		—		—
Derivative instruments — assets:
Foreign currency forward/option contracts		229		—		229		—
Interest rate swap contracts		27		—		27		—
Liabilities:
Derivative instruments — liabilities:
Foreign currency forward/option contracts		36		—		36		—
Commodity price swap contracts		4		—		4		—
Interest rate swap contracts		3		—		3		—

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

(Millions)
Marketable securities — certain U.S. municipal securities and auction rate
securities only	2015		2014		2013
Beginning balance	$	15	$	11	$	7
Total gains or losses:
Included in earnings		—		(1)		—
Included in other comprehensive income		—		2		4
Purchases and issuances		—		15		—
Sales and settlements		(3)		(12)		—
Transfers in and/or out of level 3		—		—		—
Ending balance		12		15		11
Change in unrealized gains or losses for the period included in earnings for securities held at the end of the reporting period		—		—		—

Fair Value of Financial Instruments by Balance Sheet Grouping

	December 31, 2015				December 31, 2014
	Carrying		Fair		Carrying		Fair
(Millions)	Value		Value		Value		Value
Medium-term fixed rate note due September 2016 (long-term in 2014 and short-term in 2015)	$	999	$	1,003	$	996	$	1,014
Long-term debt, excluding current portion and medium-term fixed rate note due September 2016		8,753		9,101		5,709		6,189

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies

Minimum lease payments under capital and operating leases with non-cancelable terms in excess of one year

Minimum lease payments under capital and operating leases with non-cancelable terms in excess of one year as of December 31, 2015, were as follows:

			Operating
(Millions)	Capital Leases		Leases
2016	$	11	$	234
2017		6		191
2018		4		134
2019		3		86
2020		3		72
After 2020		32		226
Total	$	59	$	943
Less: Amounts representing interest		5
Present value of future minimum lease payments		54
Less: Current obligations under capital leases		8
Long-term obligations under capital leases	$	46

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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Stock-Based Compensation

Stock-Based Compensation Expense

Stock-Based Compensation Expense

	Years ended December 31
(Millions)	2015		2014		2013
Cost of sales	$	46	$	47	$	27
Selling, general and administrative expenses		185		192		183
Research, development and related expenses		45		41		30
Stock-based compensation expenses	$	276	$	280	$	240
Income tax benefits	$	(87)	$	(79)	$	(71)
Stock-based compensation expenses, net of tax	$	189	$	201	$	169

Stock Option Activity

Stock Option Program

The following table summarizes stock option activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
	Number of	Average		Number of	Average		Number of	Average
	Options	Exercise Price		Options	Exercise Price		Options	Exercise Price
Under option —
January 1	39,235,557	$	90.38	43,938,778	$	83.84	56,565,030	$	80.33
Granted:
Annual	5,529,544		165.91	5,736,183		126.77	6,220,810		101.55
Progressive (Reload)	—		—	—		—	140,447		109.83
Other	—		—	—		—	191		119.62
Exercised	(5,978,382)		83.74	(10,219,261)		82.37	(18,825,218)		79.25
Canceled	(234,274)		128.99	(220,143)		105.11	(162,482)		89.92
December 31	38,552,445	$	102.01	39,235,557	$	90.38	43,938,778	$	83.84
Options exercisable
December 31	27,262,062	$	85.97	27,502,208	$	81.42	32,038,228	$	79.58

Stock Option Assumptions

Stock Option Assumptions

	Annual									Progressive (Reload)
	2015			2014			2013			2015			2014			2013
Exercise price	$	165.94		$	126.72		$	101.49		$	—		$	—		$	109.84
Risk-free interest rate		1.5	%		1.9	%		1.2	%		—	%		—	%		0.2	%
Dividend yield		2.5	%		2.6	%		2.7	%		—	%		—	%		2.7	%
Volatility		20.1	%		20.8	%		20.0	%		—	%		—	%		16.3	%
Expected life (months)		76			75			75			—			—			12
Black-Scholes fair value	$	23.98		$	19.63		$	13.46		$	—		$	—		$	6.42

Restricted Stock Units and Restricted Stock Activity

Restricted Stock and Restricted Stock Units

The following table summarizes restricted stock and restricted stock unit activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Number of	Grant Date		Number of	Grant Date		Number of	Grant Date
	Awards	Fair Value		Awards	Fair Value		Awards	Fair Value
Nonvested balance —
As of January 1	2,817,786	$	104.41	3,105,361	$	92.31	3,261,562	$	85.17
Granted
Annual	671,204		165.86	798,615		126.79	946,774		101.57
Other	26,886		156.94	78,252		152.74	44,401		111.19
Vested	(1,010,612)		89.99	(1,100,675)		90.37	(1,100,095)		79.93
Forfeited	(64,176)		118.99	(63,767)		97.23	(47,281)		90.82
As of December 31	2,441,088	$	127.47	2,817,786	$	104.41	3,105,361	$	92.31

Performance Shares Activity

The following table summarizes performance share activity for the years ended December 31:

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Number of	Grant Date		Number of	Grant Date		Number of	Grant Date
	Awards	Fair Value		Awards	Fair Value		Awards	Fair Value
Undistributed balance —
As of January 1	1,099,752	$	102.65	895,635	$	88.12	1,089,084	$	79.27
Granted	227,798		158.88	305,225		124.89	353,734		96.87
Distributed	(323,938)		83.08	(277,358)		84.74	(507,083)		75.16
Performance change	(106,760)		127.70	212,461		109.74	(6,949)		77.01
Forfeited	(25,660)		125.33	(36,212)		109.44	(33,151)		91.34
As of December 31	871,192	$	120.89	1,099,752	$	102.65	895,635	$	88.12

General Employees' Stock Purchase Plan (GESPP)

General Employees’ Stock Purchase Plan

	2015			2014			2013
		Weighted			Weighted			Weighted
		Average			Average			Average
	Shares	Exercise Price		Shares	Exercise Price		Shares	Exercise Price
Options granted	1,007,669	$	133.52	1,073,956	$	118.73	1,259,247	$	93.46
Options exercised	(1,007,669)		133.52	(1,073,956)		118.73	(1,259,247)		93.46
Shares available for grant - December 31	28,104,335			29,112,004			30,185,960

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Business Segments (Tables)

12 Months Ended

Dec. 31, 2015

Business Segments

Business Segment Information

Business Segment Products

Business Segment	Major Products
Industrial	Tapes, coated, nonwoven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, filtration products, closure systems for personal hygiene products, acoustic systems products, automotive components, abrasion-resistant films, structural adhesives and paint finishing and detailing products
Safety and Graphics	Personal protection products, traffic safety and security products, commercial graphics systems, commercial cleaning and protection products, floor matting, roofing granules for asphalt shingles, and fall protection products
Health Care	Medical and surgical supplies, skin health and infection prevention products, drug delivery systems, dental and orthodontic products, health information systems and food safety products
Electronics and Energy	Optical films solutions for electronic displays, packaging and interconnection devices, insulating and splicing solutions for the electronics, telecommunications and electrical industries, touch screens and touch monitors, renewable energy component solutions, and infrastructure protection products
Consumer	Sponges, scouring pads, high-performance cloths, consumer and office tapes, repositionable notes, indexing systems, construction and home improvement products, home care products, protective material products, and consumer and office tapes and adhesives

Business Segment Information

	Net Sales						Operating Income
(Millions)	2015		2014		2013		2015		2014		2013
Industrial	$	10,328	$	10,990	$	10,657	$	2,263	$	2,389	$	2,307
Safety and Graphics		5,515		5,732		5,584		1,305		1,296		1,227
Health Care		5,420		5,572		5,334		1,724		1,724		1,672
Electronics and Energy		5,220		5,604		5,393		1,102		1,115		954
Consumer		4,422		4,523		4,435		1,046		995		945
Corporate and Unallocated		1		4		8		(355)		(251)		(321)
Elimination of Dual Credit		(632)		(604)		(540)		(139)		(133)		(118)
Total Company	$	30,274	$	31,821	$	30,871	$	6,946	$	7,135	$	6,666

	Assets						Depreciation & Amortization						Capital Expenditures
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014		2013
Industrial	$	9,203	$	8,508	$	8,833	$	374	$	383	$	373	$	317	$	395	$	511
Safety and Graphics		7,564		4,939		5,122		245		234		255		199		221		207
Health Care		4,403		4,344		4,329		179		181		171		168		169		120
Electronics and Energy		4,815		5,116		5,336		291		271		260		211		232		261
Consumer		2,393		2,434		2,516		108		108		106		124		111		128
Corporate and Unallocated		4,340		5,868		7,168		238		231		206		442		365		438
Total Company	$	32,718	$	31,209	$	33,304	$	1,435	$	1,408	$	1,371	$	1,461	$	1,493	$	1,665

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Geographic Areas (Tables)

12 Months Ended

Dec. 31, 2015

Geographic Areas Disclosure

Geographic Areas

													Property, Plant and
	Net Sales						Operating Income						Equipment - net
(Millions)	2015		2014		2013		2015		2014		2013		2015		2014
United States	$	12,049	$	11,714	$	11,151	$	2,647	$	2,540	$	2,210	$	4,838	$	4,619
Asia Pacific		9,041		9,418		9,047		2,580		2,487		2,386		1,647		1,798
Europe, Middle East and Africa		6,228		7,198		7,085		1,017		1,234		1,168		1,531		1,502
Latin America and Canada		2,982		3,504		3,611		706		867		908		499		570
Other Unallocated		(26)		(13)		(23)		(4)		7		(6)		—		—
Total Company	$	30,274	$	31,821	$	30,871	$	6,946	$	7,135	$	6,666	$	8,515	$	8,489

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Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Data (Unaudited)

Schedule of Quarterly Financial Information

(Millions, except per-share amounts)	First		Second		Third		Fourth		Year
2015	Quarter		Quarter		Quarter		Quarter		2015
Net sales	$	7,578	$	7,686	$	7,712	$	7,298	$	30,274
Cost of sales		3,821		3,858		3,877		3,827		15,383
Net income including noncontrolling interest		1,201		1,303		1,298		1,039		4,841
Net income attributable to 3M		1,199		1,300		1,296		1,038		4,833
Earnings per share attributable to 3M common shareholders - basic		1.88		2.06		2.09		1.69		7.72
Earnings per share attributable to 3M common shareholders - diluted		1.85		2.02		2.05		1.66		7.58

(Millions, except per-share amounts)	First		Second		Third		Fourth		Year
2014	Quarter		Quarter		Quarter		Quarter		2014
Net sales	$	7,831	$	8,134	$	8,137	$	7,719	$	31,821
Cost of sales		4,031		4,184		4,205		4,027		16,447
Net income including noncontrolling interest		1,225		1,283		1,311		1,179		4,998
Net income attributable to 3M		1,207		1,267		1,303		1,179		4,956
Earnings per share attributable to 3M common shareholders - basic		1.83		1.94		2.02		1.85		7.63
Earnings per share attributable to 3M common shareholders - diluted		1.79		1.91		1.98		1.81		7.49

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Significant Accounting Policies (Details) $ / shares in Units, shares in Millions, VEF in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares	Sep. 30, 2015 USD ($) $ / shares	Jun. 30, 2015 USD ($) $ / shares	Mar. 31, 2015 USD ($) $ / shares	Dec. 31, 2014 USD ($) $ / shares	Sep. 30, 2014 USD ($) $ / shares	Jun. 30, 2014 USD ($) $ / shares	Mar. 31, 2014 USD ($) $ / shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares	Dec. 31, 2015 VEF
Foreign Currency Translation
Threshold percentage used to determine if economic environment is highly inflationary									100.00%
Number of years used to determine if economic environment is highly inflationary									3 years
Operating income of Venezuelan subsidiary as percent of consolidated amount high end of range									1.00%
Maximum balance of company's net monetary liabilities in Venezuelan bolivars | VEF												VEF 500
Exchange rate established by Venezuelan government from bolivars to dollars - CENCOEX												6
Exchange rate established by Venezuelan government from bolivars to dollars - SICAD												13
Exchange rate established by Venezuelan government from bolivars to dollars - SIMADI												200
Earnings per share
Options outstanding not included in computation of diluted earnings per share (in shares)									5.0	1.4	2.0
Numerator:
Net income attributable to 3M | $	$ 1,038	$ 1,296	$ 1,300	$ 1,199	$ 1,179	$ 1,303	$ 1,267	$ 1,207	$ 4,833	$ 4,956	$ 4,659
Denominator:
Denominator for weighted average 3M common shares outstanding - basic (in shares)									625.6	649.2	681.9
Dilution associated with the Company's stock-based compensation plans (in shares)									11.6	12.8	11.7
Denominator for weighted average 3M common shares outstanding - diluted (in shares)									637.2	662.0	693.6
Earnings per share attributable to 3M common shareholders - basic (in dollars per share) | $ / shares	$ 1.69	$ 2.09	$ 2.06	$ 1.88	$ 1.85	$ 2.02	$ 1.94	$ 1.83	$ 7.72	$ 7.63	$ 6.83
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share) | $ / shares	$ 1.66	$ 2.05	$ 2.02	$ 1.85	$ 1.81	$ 1.98	$ 1.91	$ 1.79	$ 7.58	$ 7.49	$ 6.72

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Significant Accounting Policies - PP&E (Details)	12 Months Ended
	Dec. 31, 2015
Minimum | Buildings and improvements
Property, plant and equipment - at cost
Property Plant And Equipment Useful Life	10 years
Property Plant And Equipment Useful Life Majority	20 years
Minimum | Machinery and equipment
Property, plant and equipment - at cost
Property Plant And Equipment Useful Life	3 years
Property Plant And Equipment Useful Life Majority	5 years
Minimum | Internal use software
Property, plant and equipment - at cost
Property Plant And Equipment Useful Life	3 years
Maximum | Buildings and improvements
Property, plant and equipment - at cost
Property Plant And Equipment Useful Life	40 years
Property Plant And Equipment Useful Life Majority	40 years
Maximum | Machinery and equipment
Property, plant and equipment - at cost
Property Plant And Equipment Useful Life	15 years
Property Plant And Equipment Useful Life Majority	10 years
Maximum | Internal use software
Property, plant and equipment - at cost
Property Plant And Equipment Useful Life	7 years

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Significant Accounting Policies - Acquired intangibles (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets
Asset retirement obligation liability	$ 102	$ 96
Advertising and merchandising expense	368	407	$ 423
Research, development and related expenses	1,763	1,770	1,715
Research and development expense	1,223	1,193	$ 1,150
Deferred tax assets valuation allowance	$ 31	$ 22
Minimum
Finite Lived Intangible Assets
Intangible assets useful life	1 year
Minimum | Customer related intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	7 years
Minimum | Patents
Finite Lived Intangible Assets
Intangible assets useful life	5 years
Minimum | Other technology-based intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	2 years
Minimum | Definite-lived tradenames
Finite Lived Intangible Assets
Intangible assets useful life	3 years
Minimum | Other amortizable intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	2 years
Maximum
Finite Lived Intangible Assets
Intangible assets useful life	20 years
Maximum | Customer related intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	17 years
Maximum | Patents
Finite Lived Intangible Assets
Intangible assets useful life	13 years
Maximum | Other technology-based intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	15 years
Maximum | Definite-lived tradenames
Finite Lived Intangible Assets
Intangible assets useful life	20 years
Maximum | Other amortizable intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	10 years

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Significant Accounting Policies - Accounting Changes (Details) $ in Millions	Dec. 31, 2014 USD ($)
Marketable securities - current | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	$ 1,439
Marketable securities - noncurrent | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	15
Total marketable securities | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	1,454
Previously Reported | Marketable securities - current | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	626
Previously Reported | Marketable securities - noncurrent | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	828
Previously Reported | Total marketable securities | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	1,454
Impact | Marketable securities - current | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	813
Impact | Marketable securities - noncurrent | Change in accounting principle marketable securities
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	(813)
ASU 2015-03 Simplifying the presentation of debt issuance costs | Impact | Debt issuance costs
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	26
ASU 2015-17 Balance sheet classification of deferred taxes | Prepaid expenses and other (within other current assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	764
ASU 2015-17 Balance sheet classification of deferred taxes | Deferred tax assets (within other assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	1,130
ASU 2015-17 Balance sheet classification of deferred taxes | Previously Reported | Prepaid expenses and other (within other current assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	595
ASU 2015-17 Balance sheet classification of deferred taxes | Previously Reported | Other current tax assets (within other current assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	444
ASU 2015-17 Balance sheet classification of deferred taxes | Previously Reported | Deferred tax assets (within other assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	889
ASU 2015-17 Balance sheet classification of deferred taxes | Previously Reported | Deferred tax liabilities (within other current liabilities)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	34
ASU 2015-17 Balance sheet classification of deferred taxes | Impact | Prepaid expenses and other (within other current assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	169
ASU 2015-17 Balance sheet classification of deferred taxes | Impact | Other current tax assets (within other current assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	(444)
ASU 2015-17 Balance sheet classification of deferred taxes | Impact | Deferred tax assets (within other assets)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	241
ASU 2015-17 Balance sheet classification of deferred taxes | Impact | Deferred tax liabilities (within other current liabilities)
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures [Abstract]
New accounting pronouncement or change in accounting principle details	$ (34)

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Acquisitions and Divestitures - Acquisitions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) item	Dec. 31, 2013 item
Business Acquisitions Information
Purchase price paid for business combinations (net of cash acquired)	$ 2,914	$ 94
Accounts receivable	103
Inventory	102
Other current assets	12
Property, plant and equipment	171
Purchased finite-lived intangible assets		34
Purchased indefinite-lived intangible assets	520
Purchased goodwill	2,495
Accounts payable and other liabilities, net of other assets	(232)
Interest bearing debt	(766)
Deferred tax asset/(liability)	(471)
Net assets acquired	2,914
Supplemental information:
Cash paid	2,949
Cash Acquired from Acquisition	35
Cash paid, net of cash acquired	2,914	$ 94
Number of business combinations completed | item		1	0
Customer related intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	755
Patents
Business Acquisitions Information
Purchased finite-lived intangible assets	62
Other technology-based intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	128
Definite-lived tradenames
Business Acquisitions Information
Purchased finite-lived intangible assets	33
Other amortizable intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	$ 2
Maximum
Business Acquisitions Information
Intangible assets useful life	20 years	10 years
Minimum
Business Acquisitions Information
Intangible assets useful life	2 years	3 years
Weighted Average [Member]
Business Acquisitions Information
Intangible assets useful life	14 years	6 years
Weighted Average [Member] | Customer related intangible assets
Business Acquisitions Information
Intangible assets useful life	16 years
Weighted Average [Member] | Patents
Business Acquisitions Information
Intangible assets useful life	7 years
Weighted Average [Member] | Other technology-based intangible assets
Business Acquisitions Information
Intangible assets useful life	7 years
Weighted Average [Member] | Definite-lived tradenames
Business Acquisitions Information
Intangible assets useful life	16 years
Weighted Average [Member] | Other amortizable intangible assets
Business Acquisitions Information
Intangible assets useful life	4 years
Capital Safety
Business Acquisitions Information
Purchase price paid for business combinations (net of cash acquired)	$ 1,724
Accounts receivable	66
Inventory	63
Other current assets	10
Property, plant and equipment	36
Purchased indefinite-lived intangible assets	520
Purchased goodwill	1,764
Accounts payable and other liabilities, net of other assets	(105)
Interest bearing debt	(766)
Deferred tax asset/(liability)	(464)
Net assets acquired	1,724
Supplemental information:
Cash paid	1,758
Cash Acquired from Acquisition	34
Cash paid, net of cash acquired	1,724
Capital Safety | Customer related intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	445
Capital Safety | Patents
Business Acquisitions Information
Purchased finite-lived intangible assets	44
Capital Safety | Other technology-based intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	85
Capital Safety | Definite-lived tradenames
Business Acquisitions Information
Purchased finite-lived intangible assets	26
Polypore Separations Media
Business Acquisitions Information
Purchase price paid for business combinations (net of cash acquired)	1,037
Accounts receivable	30
Inventory	35
Other current assets	1
Property, plant and equipment	128
Purchased goodwill	636
Accounts payable and other liabilities, net of other assets	(122)
Net assets acquired	1,037
Supplemental information:
Cash paid	1,037
Cash paid, net of cash acquired	1,037
Polypore Separations Media | Customer related intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	270
Polypore Separations Media | Patents
Business Acquisitions Information
Purchased finite-lived intangible assets	11
Polypore Separations Media | Other technology-based intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	42
Polypore Separations Media | Definite-lived tradenames
Business Acquisitions Information
Purchased finite-lived intangible assets	6
Other Acquisitions
Business Acquisitions Information
Purchase price paid for business combinations (net of cash acquired)	153
Accounts receivable	7
Inventory	4
Other current assets	1
Property, plant and equipment	7
Purchased goodwill	95
Accounts payable and other liabilities, net of other assets	(5)
Deferred tax asset/(liability)	(7)
Net assets acquired	153
Supplemental information:
Cash paid	154
Cash Acquired from Acquisition	1
Cash paid, net of cash acquired	153
Other Acquisitions | Customer related intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	40
Other Acquisitions | Patents
Business Acquisitions Information
Purchased finite-lived intangible assets	7
Other Acquisitions | Other technology-based intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	1
Other Acquisitions | Definite-lived tradenames
Business Acquisitions Information
Purchased finite-lived intangible assets	1
Other Acquisitions | Other amortizable intangible assets
Business Acquisitions Information
Purchased finite-lived intangible assets	$ 2

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Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Dec. 31, 2015
Pressurized Polyurethane Foam Adhesives Business Member
Divestiture Information
Annual sales of divested business	$ 20
Library Systems And Faab Fabricauto In Aggregate Member
Divestiture Information
Aggregate selling price relative to the divestiture transaction			$ 104
Aggregate net pre-tax gain on sale			40
Aggregate net after tax gain on sale			$ 10
Static Control Business Member
Divestiture Information
Annual sales of divested business		$ 46

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Acquisitions and Divestitures - NCI (Details) - Sumitomo 3M Limited ¥ in Billions	1 Months Ended
	Sep. 30, 2014 JPY (¥)
Transactions with 3M subsidiaries that have non controlling interests
Percent of interest acquired of Sumitomo 3M Limited	25.00%
Amount of acquisition for remaining non-controlling interest	¥ 90

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Goodwill and Intangible Assets (Goodwill balance by business segment) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill Information
Goodwill acquired during the period which is deductible for tax purposes	$ 636,000,000	$ 0
Goodwill
Balance at the beginning of the period	7,050,000,000	7,345,000,000
Acquisition activity	2,495,000,000	65,000,000
Translation and other	(296,000,000)	(360,000,000)
Balance at the end of the period	9,249,000,000	7,050,000,000
Amount of Goodwill impairment	0	0
Industrial
Goodwill
Balance at the beginning of the period	2,037,000,000	2,166,000,000
Acquisition activity	637,000,000
Translation and other	(106,000,000)	(129,000,000)
Balance at the end of the period	2,568,000,000	2,037,000,000
Safety and Graphics
Goodwill
Balance at the beginning of the period	1,650,000,000	1,740,000,000
Acquisition activity	1,764,000,000
Translation and other	(72,000,000)	(90,000,000)
Balance at the end of the period	3,342,000,000	1,650,000,000
Health Care
Goodwill
Balance at the beginning of the period	1,589,000,000	1,596,000,000
Acquisition activity	94,000,000	65,000,000
Translation and other	(59,000,000)	(72,000,000)
Balance at the end of the period	1,624,000,000	1,589,000,000
Electronics and Energy
Goodwill
Balance at the beginning of the period	1,559,000,000	1,612,000,000
Translation and other	(44,000,000)	(53,000,000)
Balance at the end of the period	1,515,000,000	1,559,000,000
Consumer
Goodwill
Balance at the beginning of the period	215,000,000	231,000,000
Translation and other	(15,000,000)	(16,000,000)
Balance at the end of the period	$ 200,000,000	$ 215,000,000

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Goodwill and Intangible Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Acquired intangible assets disclosures
Total gross carrying amount	$ 3,751	$ 2,958
Total accumulated amortization	(1,785)	(1,646)
Total finite-lived intangible assets - net	1,966	1,312
Non-amortizable intangible assets (primarily tradenames)	635	123
Total intangible assets - net	2,601	1,435
Customer related intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	1,973	1,348
Total accumulated amortization	(668)	(597)
Patents
Acquired intangible assets disclosures
Total gross carrying amount	616	581
Total accumulated amortization	(481)	(472)
Other technology-based intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	525	407
Total accumulated amortization	(252)	(215)
Definite-lived tradenames
Acquired intangible assets disclosures
Total gross carrying amount	421	401
Total accumulated amortization	(215)	(195)
Other amortizable intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	216	221
Total accumulated amortization	$ (169)	$ (167)

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Goodwill and Intangible Assets (Schedules for Amortization Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Asset
Amortization expense for acquired intangible assets	$ 229	$ 228	$ 236
Expected amortization expense for acquired intangible assets recorded as of balance sheet date
2016	252
2017	226
2018	205
2019	192
2020	183
After 2020	$ 908

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Restructuring Actions (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015 item	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | item	1,700
Restructuring charges		$ 114
Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		98
Asset-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		16
Corporate and Unallocated
Restructuring Cost and Reserve [Line Items]
Restructuring charges		37
Corporate and Unallocated | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		37
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges		40
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges		62
Research, development and related expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges		12
Industrial | Business Segments.
Restructuring Cost and Reserve [Line Items]
Restructuring charges		42
Industrial | Business Segments. | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		30
Industrial | Business Segments. | Asset-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		12
Safety and Graphics | Business Segments.
Restructuring Cost and Reserve [Line Items]
Restructuring charges		11
Safety and Graphics | Business Segments. | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		11
Health Care | Business Segments.
Restructuring Cost and Reserve [Line Items]
Restructuring charges		9
Health Care | Business Segments. | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		9
Electronics and Energy | Business Segments.
Restructuring Cost and Reserve [Line Items]
Restructuring charges		12
Electronics and Energy | Business Segments. | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		8
Electronics and Energy | Business Segments. | Asset-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		4
Consumer | Business Segments.
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3
Consumer | Business Segments. | Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 3

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Restructuring Actions - Roll Forward (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Restructuring Reserve [Roll Forward]
Expenses incurred	$ 114
Non-cash changes	(24)
Cash payments	(27)
Restructuring action balances, Ending Balance	63
Employee-Related
Restructuring Reserve [Roll Forward]
Expenses incurred	98
Non-cash changes	(8)
Cash payments	(27)
Restructuring action balances, Ending Balance	63
Asset-Related
Restructuring Reserve [Roll Forward]
Expenses incurred	16
Non-cash changes	$ (16)

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Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other current assets
Prepaid expenses and other	$ 1,081	$ 764
Derivative assets-current	211	182
Insurance related receivables prepaid expenses and other	106	77
Total other current assets	1,398	1,023
Investments
Equity method	56	58
Cost method	59	41
Other investments	2	3
Total investments	117	102
Other assets
Deferred income taxes	510	1,130
Insurance related receivables and other	49	89
Cash surrender value of life insurance policies	241	245
Other	253	305
Total other assets	1,053	1,769
Other current liabilities
Accrued trade payables	566	533
Deferred income	518	541
Derivative liabilities	65	39
Dividends payable		648	$ 567
Employee benefits and withholdings	148	172
Contingent liability claims and other	147	157
Property and other taxes	89	90
Pension and postretirement benefits	60	60
Other	811	644
Total other current liabilities	2,404	2,884
Other liabilities
Long term income taxes payable	154	519
Employee benefits	254	262
Contingent liability claims and other	295	300
Capital lease obligations	46	59
Deferred income	19	21
Deferred income taxes	551	141
Other	261	253
Total other liabilities	1,580	1,555
Drafts payable
Drafts payable on demand included in Accounts payable	$ 79	$ 1

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Supplemental Balance Sheet Information (Details 2) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, plant and equipment - at cost
Gross property, plant and equipment	$ 23,098	$ 22,841
Less: Accumulated depreciation	(14,583)	(14,352)
Property, Plant and Equipment - net	8,515	8,489
Accumulated depreciation for capital leases included in Accumulated depreciation	98	87
Land
Property, plant and equipment - at cost
Gross property, plant and equipment	354	368
Buildings and leasehold improvements
Property, plant and equipment - at cost
Gross property, plant and equipment	7,120	6,943
Machinery and equipment
Property, plant and equipment - at cost
Gross property, plant and equipment	14,743	14,684
Construction in progress
Property, plant and equipment - at cost
Gross property, plant and equipment	723	679
Capital leases
Property, plant and equipment - at cost
Gross property, plant and equipment	$ 158	$ 167

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Supplemental Equity and Comprehensive Income Information (Details) - $ / shares	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Equity and Comprehensive Income Information
Common stock, par value per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,000,000,000	3,000,000,000	3,000,000,000
Common stock, shares issued (in shares)	944,033,056	944,033,056	944,033,056
Treasury stock (in shares)	334,702,932	308,898,462	280,736,817	256,941,406
Preferred stock, shares authorized	10,000,000	10,000,000	10,000,000

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Supplemental Equity and Comprehensive Income Information - Dividends (Details) - $ / shares	1 Months Ended		3 Months Ended						12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Equity and Comprehensive Income Information
Dividends that have been declared but paid in subsequent period (in dollars per share)	$ 1.025	$ 0.855
Dividends declared in current period (in dollars per share)			$ 1.025	$ 1.025	$ 1.025	$ 0.855	$ 0.855	$ 0.855	$ 3.075	$ 3.59	$ 3.395
Cash dividends paid per 3M common share (in dollars per share)									$ 4.10	$ 3.42	$ 2.54

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Supplemental Equity and Comprehensive Income Information - AOCI rf (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity Attributable to Parent, Beginning Balance	$ 13,109
Other comprehensive income (loss), before tax:
Stockholders' Equity Attributable to Parent, Ending Balance	11,708	$ 13,109
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity Attributable to Parent, Beginning Balance	(6,289)	(3,913)	$ (4,750)
Other comprehensive income (loss), before tax:
Amounts before reclassifications	132	(3,321)	801
Amounts reclassified out	363	357	691
Total other comprehensive income (loss), before tax	495	(2,964)	1,492
Tax effect	(565)	563	(655)
Total other comprehensive income (loss), net of tax	(70)	(2,401)	837
Impact From Purchase Of Subsidiary Shares		25
Stockholders' Equity Attributable to Parent, Ending Balance	(6,359)	(6,289)	(3,913)
Cumulative Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity Attributable to Parent, Beginning Balance	(1,095)	(188)	230
Other comprehensive income (loss), before tax:
Amounts before reclassifications	(447)	(856)	(462)
Total other comprehensive income (loss), before tax	(447)	(856)	(462)
Tax effect	(137)	(92)	44
Total other comprehensive income (loss), net of tax	(584)	(948)	(418)
Impact From Purchase Of Subsidiary Shares		41
Stockholders' Equity Attributable to Parent, Ending Balance	(1,679)	(1,095)	(188)
Gains (losses) associated with defined benefit pension and postretirement plans amortization
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity Attributable to Parent, Beginning Balance	(5,293)	(3,715)	(4,955)
Other comprehensive income (loss), before tax:
Amounts before reclassifications	367	(2,638)	1,361
Amounts reclassified out	537	360	569
Total other comprehensive income (loss), before tax	904	(2,278)	1,930
Tax effect	(415)	716	(690)
Total other comprehensive income (loss), net of tax	489	(1,562)	1,240
Impact From Purchase Of Subsidiary Shares		(16)
Stockholders' Equity Attributable to Parent, Ending Balance	(4,804)	(5,293)	(3,715)
Debt and equity security gains (losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity Attributable to Parent, Beginning Balance		(2)	(2)
Other comprehensive income (loss), before tax:
Amounts before reclassifications		2
Amounts reclassified out		1
Total other comprehensive income (loss), before tax		3
Tax effect		(1)
Total other comprehensive income (loss), net of tax		2
Stockholders' Equity Attributable to Parent, Ending Balance			(2)
Cash flow hedging instruments gains (losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' Equity Attributable to Parent, Beginning Balance	99	(8)	(23)
Other comprehensive income (loss), before tax:
Amounts before reclassifications	212	171	(98)
Amounts reclassified out	(174)	(4)	122
Total other comprehensive income (loss), before tax	38	167	24
Tax effect	(13)	(60)	(9)
Total other comprehensive income (loss), net of tax	25	107	15
Stockholders' Equity Attributable to Parent, Ending Balance	$ 124	$ 99	$ (8)

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Supplemental Equity and Comprehensive Income Information - Reclass AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses	$ (6,182)	$ (6,469)	$ (6,384)
Tax effect	(1,982)	(2,028)	(1,841)
Net of tax	4,763	2,555	5,496
Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net of tax	(250)	(236)	(449)
Gains (losses) associated with defined benefit pension and postretirement plans amortization
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total before tax	904	(2,278)	1,930
Gains (losses) associated with defined benefit pension and postretirement plans amortization | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Transition asset	1	1	1
Prior service benefit	79	59	77
Net actuarial loss	(626)	(420)	(647)
Curtailments/Settlements	9
Total before tax	(537)	(360)	(569)
Tax effect	176	122	197
Net of tax	(361)	(238)	(372)
Debt and equity security gains (losses)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total before tax		3
Debt and equity security gains (losses) | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses		(1)
Total before tax		(1)
Net of tax		(1)
Cash flow hedging instruments gains (losses)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total before tax	38	167	24
Cash flow hedging instruments gains (losses) | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Total before tax	174	4	(122)
Tax effect	(63)	(1)	45
Net of tax	111	3	(77)
Cash flow hedging instruments gains (losses) | Foreign currency forward/option contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	178	3	(11)
Cash flow hedging instruments gains (losses) | Foreign currency forward contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense			(108)
Cash flow hedging instruments gains (losses) | Commodity price swap contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(2)	2	(2)
Cash flow hedging instruments gains (losses) | Interest rate swap contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (2)	$ (1)	$ (1)

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Supplemental Equity and Comprehensive Income Information - NCI (Details) $ in Millions, ¥ in Billions	1 Months Ended		12 Months Ended
	Sep. 30, 2014 JPY (¥)	Mar. 31, 2013 USD ($)	Dec. 31, 2013 USD ($)
Transactions with 3M subsidiaries that have non controlling interests
Sale of subsidiary shares			$ 8
Common Stock and Additional Paid-in Capital
Transactions with 3M subsidiaries that have non controlling interests
Sale of subsidiary shares			7
Noncontrolling Interest
Transactions with 3M subsidiaries that have non controlling interests
Sale of subsidiary shares			$ 1
3M India Limited
Transactions with 3M subsidiaries that have non controlling interests
3M's effective ownership after transaction		75.00%
Minority Interest Ownership Percentage By Parent Before Transaction		76.00%
Minimum percentage of public shareholding required by an amendment to Indian Securities regulations to comply with the sale of shares for 3M India Limited		25.00%
Sale of subsidiary shares		$ 8
Sumitomo 3M Limited
Transactions with 3M subsidiaries that have non controlling interests
3M's effective ownership after transaction (as a percent)	100.00%
Percent of interest acquired of Sumitomo 3M Limited	25.00%
Amount of acquisition for remaining non-controlling interest | ¥	¥ 90

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Supplemental Equity and Comprehensive Income Information - Impact of NCI (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
Supplemental Equity and Comprehensive Income Information
Net income attributable to 3M	$ 1,038	$ 1,296	$ 1,300	$ 1,199	$ 1,179	$ 1,303	$ 1,267	$ 1,207	$ 4,833	$ 4,956	$ 4,659
Impact of purchase of subsidiary shares										(409)
Change in 3M Company shareholder's equity from net income attributable to 3M and impact of purchase of subsidiary shares										$ 4,547

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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Elements
Cash income tax payments, net of refunds	$ 2,331	$ 1,968	$ 1,803
Cash interest payments	134	178	169
Capitalized interest	$ 13	$ 15	$ 21

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Supplemental Cash Flow Information (Details 2) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013
Transactions related to investing activities with significant non-cash components
Dividends that have been declared but paid in subsequent period (in dollars per share)	$ 1.025	$ 0.855
Increase of Current Liabilities due to dividend declared but not paid	$ 648	$ 567
Sumitomo 3M Limited administrative headquarters sale
Transactions related to investing activities with significant non-cash components
Note receivable due				$ 78
Deferred profit from sale of Sumitomo 3M Limited				$ 49
Non-strategic equity interest sale within Health Care
Transactions related to investing activities with significant non-cash components
Note receivable due			$ 24
Gain on sale of non-strategic equity investment within Health Care Business Group			$ 18
City of Nevada, MO
Transactions related to investing activities with significant non-cash components
City of Nevada, MO Municipal Bond Value	$ 15

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Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Before Income Taxes
United States	$ 4,399	$ 3,815	$ 3,194
International	2,424	3,211	3,368
Income before income taxes	$ 6,823	$ 7,026	$ 6,562

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Income Taxes (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Currently payable
Federal	$ 1,338	$ 1,103	$ 948
State	101	108	91
International	566	1,008	901
Deferred
Federal	(55)	(171)	(123)
State	6	(9)	(2)
International	26	(11)	26
Total provision for income taxes	$ 1,982	$ 2,028	$ 1,841

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Income Taxes (Details 3) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Accruals not currently deductible
Employee benefit costs	$ 175	$ 148
Product and other claims	146	152
Miscellaneous accruals	114	137
Pension costs	1,120	1,312
Stock-based compensation	305	290
Net operating/capital loss carryforwards	109	175
Foreign tax credits	25	360
Inventory	46	52
Other		30
Gross deferred tax assets	2,040	2,656
Valuation allowance	(31)	(22)
Total deferred tax assets	2,009	2,634
Deferred tax liabilities:
Product and other insurance receivables	(28)	(31)
Accelerated depreciation	(736)	(804)
Intangible amortization	(1,017)	(719)
Currency translation	(199)	(91)
Other	(70)
Total deferred tax liabilities	(2,050)	(1,645)
Net deferred tax assets		$ 989
Net deferred tax liabilities	$ (41)

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Income Taxes (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income tax
Net UTB impacting the effective tax rate	$ 369	$ 265	$ 262
Interest and penalties related to unrecognized tax benefits, expense (benefit) recognized on a gross basis	2	(14)	$ 22
Interest and penalties related to unrecognized tax benefits, accrued on a gross basis	$ 45	$ 44
Increase (decrease) in effective income tax rate from prior reporting period to current reporting period (as a percent)	0.20%	0.80%
Impact of factors that decreased the effective tax rate from prior reporting period to current reporting period (as a percent)	(2.20%)	(0.80%)
Impact of factors that increased the effective tax rate from prior reporting period to current reporting period (as a percent)	2.40%	1.60%
Amount of years inclusion of US R&D credit due to reinstatement in 2013		2 years
Deferred Tax Assets, Valuation Allowance	$ 31	$ 22
Reconciliation of Effective Income Tax Rate
Statutory U.S. tax rate	35.00%	35.00%	35.00%
State income taxes--net of federal benefit	1.10%	0.90%	0.90%
International income taxes - net	(3.80%)	(5.80%)	(6.30%)
U.S. research and development credit	(0.50%)	(0.40%)	(0.70%)
Reserves for tax contingencies	(1.00%)	0.60%	1.20%
Domestic manufacturer's deduction	(1.80%)	(1.30%)	(1.60%)
All other--net	0.10%	(0.10%)	(0.40%)
Effective tax rate (as a percent)	29.10%	28.90%	28.10%
Federal, State and Foreign Tax
Gross UTB Balance at January 1	$ 583	$ 659	$ 528
Additions based on tax positions related to the current year	77	201	97
Additions for tax positions of prior years	140	30	158
Reductions for tax positions of prior years	(399)	(74)	(29)
Settlements (UTB decreases)	(4)	(154)	(17)
Reductions due to lapse of applicable statute of limitations	(16)	(79)	(78)
Gross UTB Balance at December 31	381	$ 583	$ 659
Federal
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers	$ 31
Federal | Maximum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	20 years
Federal | Minimum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	15 years
State
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers	$ 2
State | Maximum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	10 years
State | Minimum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	5 years
International
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers	$ 76
Tax effected operating loss, capital loss, and tax credit carryovers, expiration dates majority of high end of range	4 years
International | Minimum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	1 year

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Income Taxes (Details 6) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes
Income tax benefits attributable to reduced tax rates or exemptions in foreign locations	$ 114	$ 99	$ 87
EPS impact of reduced tax rates or exemptions in foreign locations (in dollars per diluted share)	$ 0.18	$ 0.15	$ 0.13
Undistributed earnings of non-U.S. subsidiaries	$ 12,000

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Marketable Securities (current and non-current) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Marketable securities classification
Current marketable securities	$ 118	$ 1,439
Non-current marketable securities	9	15
Total marketable securities	127	1,454
U.S. government agency securities
Marketable securities classification
Current marketable securities		108
Foreign government agency securities
Marketable securities classification
Current marketable securities	10	95
Corporate debt securities
Marketable securities classification
Current marketable securities	10	619
Commercial paper
Marketable securities classification
Current marketable securities	12
Certificates of deposit/time deposits
Marketable securities classification
Current marketable securities	26	41
U.S. treasury securities
Marketable securities classification
Current marketable securities		38
U.S. municipal securities
Marketable securities classification
Current marketable securities	3
Non-current marketable securities	9	15
Asset-backed securities
Marketable securities classification
Current marketable securities	57	538
Asset-backed securities Automobile loan related
Marketable securities classification
Current marketable securities	26	282
Asset-backed securities Credit card related
Marketable securities classification
Current marketable securities	10	162
Asset-backed securities Equipment lease related
Marketable securities classification
Current marketable securities	2	48
Asset-backed securities Other asset-backed securities
Marketable securities classification
Current marketable securities	$ 19	$ 46

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Marketable Securities - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) item
Marketable Securities
Percentage of asset-backed securities rated AAA/A-1+, Aaa/P-1, or AAA/F1+	75.80%
Estimated fair value of current plus long term asset backed securities | $	$ 57
Number of rating agencies for which asset backed securities must be rated	2
Number of rating agencies for asset backed securities that must be either Moody's or Standard and Poor's	1

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Marketable Securities (Contractual maturity) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Marketable securities by contractual maturity
Due in one year or less	$ 52
Due after one year through five years	74
Due after five years through ten years	1
Total marketable securities	$ 127	$ 1,454

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Long-Term Debt and Short-Term Borrowings (Details) € in Millions, £ in Millions, $ in Millions	1 Months Ended						12 Months Ended
	Aug. 31, 2015 USD ($) DerivativeInstrument	Aug. 31, 2014 USD ($)	Jul. 31, 2014 EUR (€)	Aug. 31, 2013 USD ($)	Dec. 31, 2012 GBP (£)	Dec. 31, 2004 USD ($)	Dec. 31, 2015 USD ($)	Nov. 30, 2013 EUR (€)	Dec. 31, 2012 USD ($)
Long-Term Debt
Number Of Interest Rate Swap Contracts Entered In Period | DerivativeInstrument	2
Bank guarantees
Line of Credit Facility
Bank guarantees issued and outstanding							$ 18
Eurobond 600 Million Euros Issued November 2013
Long-Term Debt
Principal amount | €								€ 600.0
Derivative notional amount | €								€ 300.0
Five-year credit facility agreement
Line of Credit Facility
Term of credit facility		5 years
Credit facility amount prior to new agreement		$ 1,500
Current borrowing capacity							2,250
Maximum increase available subject to lender approval							2,250
Maximum borrowing capacity including portion subject to lender approval							$ 4,500
Required minimum EBITDA to Interest Ratio							3.0
Actual EBITDA to Interest Ratio							56
Number of consecutive quarters over which the ratio of required EBITDA to Interest Ratio is calculated							4
Fixed rate Eurobond which matured in July 2014
Long-Term Debt
Repayment of debt | €			€ 1,025.0
Term of debt instrument			7 years
Interest rate, stated percentage (as a percent)			5.00%
Fixed rate Medium-term note which matured in 2013
Long-Term Debt
Repayment of debt				$ 850
Fixed rate medium term note due 2020
Long-Term Debt
Principal amount							$ 200
Floating rate note due 2044
Long-Term Debt
Principal amount						$ 60	$ 55
Term of debt instrument						40 years
Repurchase price of floating rate notes (as a percent)							100.00%
Floating rate notes due 2027 and 2040 and 2041
Long-Term Debt
Number of years after date of issuance that put options commence							10 years
Number of years after put options commence when additional put options occur on each anniversary thereafter until final maturity							3 years
Floating Rate UK Borrowing repaid December 2014
Line of Credit Facility
Term of credit facility					3 years
Current borrowing capacity					£ 66				$ 106
Stand alone letters of credit
Line of Credit Facility
Amount of letters of credit outstanding utilized in connection with normal business activities							$ 241
Interest rate swap contracts | Fixed rate medium term note due 2018
Long-Term Debt
Term of debt instrument	3 years
Derivative notional amount	$ 450
Interest rate swap contracts | Fixed rate medium term note due 2020
Long-Term Debt
Term of debt instrument	5 years
Derivative notional amount	$ 300
Maximum | Floating rate notes due 2027 and 2040 and 2041
Long-Term Debt
Repurchase price of floating rate notes (as a percent)							100.00%
Minimum | Floating rate notes due 2027 and 2040 and 2041
Long-Term Debt
Repurchase price of floating rate notes (as a percent)							99.00%

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Long-Term Debt and Short-Term Borrowings (Details) € in Millions, $ in Millions	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Aug. 31, 2015 USD ($)	May. 31, 2015 EUR (€)	Dec. 31, 2014 USD ($)	Nov. 30, 2014 EUR (€)	Jun. 30, 2014 USD ($)	Nov. 30, 2013 EUR (€)	Dec. 31, 2004 USD ($)
Long-Term Debt
Total long-term debt		$ 9,878.0			$ 6,760.0
Long-term debt - excluding current portion - carrying value		8,753.0			6,705.0
Short-Term Borrowings and Current Portion of Long-Term Debt
Short-term borrowings and current portion of long-term debt		2,044.0			106.0
Maturities of long-term debt
2016		1,125.0
2017		744.0
2018		993.0
2019		622.0
2020		1,203.0
After 2020		5,191.0
Total long-term debt		9,878.0			6,760.0
Floating rate note payments due in 2016		126.0
Floating rate note payments due in 2017		$ 96.0
Current portion of long-term debt
Long-Term Debt
Interest rate - effective	1.45%	1.45%
Total long-term debt		$ 1,125.0			55.0
Maturities of long-term debt
Total long-term debt		$ 1,125.0			55.0
Other borrowings
Long-Term Debt
Interest rate - effective	1.01%	1.01%
Short-Term Borrowings and Current Portion of Long-Term Debt
Short-term borrowings and current portion of long-term debt		$ 919.0			$ 51.0
Fixed-rate debt
Long-Term Debt
Interest rate - effective	2.54%	2.54%			2.74%
Total long-term debt		$ 6,712.0			$ 4,911.0
Maturities of long-term debt
Total long-term debt		$ 6,712.0			$ 4,911.0
Floating-rate debt
Long-Term Debt
Interest rate - effective	0.32%	0.32%			0.53%
Total long-term debt		$ 3,166.0			$ 1,849.0
Maturities of long-term debt
Total long-term debt		3,166.0			1,849.0
Fixed rate medium term note due 2016
Long-Term Debt
Principal amount		$ 1,000.0
Interest rate - effective	1.62%	1.62%
Total long-term debt		$ 999.0			996.0
Maturities of long-term debt
Total long-term debt		999.0			996.0
Fixed rate medium term note due 2017
Long-Term Debt
Principal amount		$ 650.0
Interest rate - effective	1.10%	1.10%
Total long-term debt		$ 648.0			647.0
Maturities of long-term debt
Total long-term debt		$ 648.0			647.0
Floating rate Euro medium term note due 2018
Long-Term Debt
Principal amount | €	€ 500.0
Interest rate - effective	0.16%	0.16%
Total long-term debt		$ 545.0			606.0
Maturities of long-term debt
Total long-term debt		545.0			606.0
Floating rate medium term note due 2018
Long-Term Debt
Principal amount		$ 450.0
Interest rate - effective	0.44%	0.44%
Total long-term debt		$ 448.0
Maturities of long-term debt
Total long-term debt		448.0
Floating rate medium term note due 2019
Long-Term Debt
Principal amount		$ 600.0
Interest rate - effective	0.55%	0.55%
Total long-term debt		$ 597.0			592.0
Maturities of long-term debt
Total long-term debt		597.0			592.0
Fixed rate medium term note due 2019
Long-Term Debt
Principal amount		$ 25.0					$ 625.0
Interest rate - effective	1.74%	1.74%
Total long-term debt		$ 25.0			25.0
Maturities of long-term debt
Total long-term debt		$ 25.0			25.0
Floating rate Euro medium term note due 2020
Long-Term Debt
Principal amount | €	€ 650.0
Interest rate - effective	0.15%	0.15%
Total long-term debt		$ 708.0
Maturities of long-term debt
Total long-term debt		708.0
Floating rate medium term note due 2020
Long-Term Debt
Principal amount		$ 300.0
Interest rate - effective	0.61%	0.61%
Total long-term debt		$ 297.0
Maturities of long-term debt
Total long-term debt		297.0
Fixed rate medium term note due 2020
Long-Term Debt
Principal amount		$ 200.0
Interest rate - effective	2.12%	2.12%
Total long-term debt		$ 198.0
Maturities of long-term debt
Total long-term debt		$ 198.0
Floating rate Eurobond Due 2021
Long-Term Debt
Principal amount | €	€ 300.0
Interest rate - effective	0.21%	0.21%
Total long-term debt		$ 348.0			389.0
Maturities of long-term debt
Total long-term debt		$ 348.0			389.0
Fixed rate Eurobond Due 2021
Long-Term Debt
Principal amount | €	€ 300.0
Interest rate - effective	1.97%	1.97%
Total long-term debt		$ 326.0			361.0
Maturities of long-term debt
Total long-term debt		326.0			361.0
Fixed rate medium term note due 2022
Long-Term Debt
Principal amount		$ 600.0
Interest rate - effective	2.17%	2.17%
Total long-term debt		$ 592.0			591.0
Maturities of long-term debt
Total long-term debt		$ 592.0			591.0
Fixed rate Euro medium term note due 2023
Long-Term Debt
Principal amount | €	€ 600.0
Interest rate - effective	1.14%	1.14%
Total long-term debt		$ 644.0
Maturities of long-term debt
Total long-term debt		644.0
Fixed rate medium term note due 2025
Long-Term Debt
Principal amount		$ 550.0
Interest rate - effective	3.04%	3.04%
Total long-term debt		$ 545.0
Maturities of long-term debt
Total long-term debt		$ 545.0
Fixed rate Euro Medium term note due 2026
Long-Term Debt
Principal amount | €	€ 750.0
Interest rate - effective	1.71%	1.71%
Total long-term debt		$ 801.0			892.0
Maturities of long-term debt
Total long-term debt		801.0			892.0
Fixed rate 30-year debenture due 2028
Long-Term Debt
Principal amount		$ 330.0
Interest rate - effective	6.01%	6.01%
Total long-term debt		$ 343.0			344.0
Maturities of long-term debt
Total long-term debt		$ 343.0			344.0
Fixed rate Euro medium term note due 2030
Long-Term Debt
Principal amount | €	€ 500.0
Interest rate - effective	1.90%	1.90%
Total long-term debt		$ 533.0
Maturities of long-term debt
Total long-term debt		533.0
Fixed rate 30-year bond due 2037
Long-Term Debt
Principal amount		$ 750.0
Interest rate - effective	5.73%	5.73%
Total long-term debt		$ 743.0			742.0
Maturities of long-term debt
Total long-term debt		743.0			742.0
Floating rate note due 2041
Long-Term Debt
Principal amount		$ 96.0
Interest rate - effective	0.22%	0.22%
Total long-term debt		$ 96.0			96.0
Maturities of long-term debt
Total long-term debt		96.0			96.0
Fixed rate medium term note due 2044
Long-Term Debt
Principal amount		$ 325.0
Interest rate - effective	4.05%	4.05%
Total long-term debt		$ 313.0			312.0
Maturities of long-term debt
Total long-term debt		313.0			312.0
Floating rate note due 2044
Long-Term Debt
Principal amount		$ 55.0							$ 60.0
Interest rate - effective	0.16%	0.16%
Total long-term debt		$ 55.0			55.0
Maturities of long-term debt
Total long-term debt		$ 55.0			55.0
Various fixed and floating rate Other borrowings due 2016-2040
Long-Term Debt
Interest rate - effective	0.22%	0.22%
Total long-term debt		$ 74.0			112.0
Maturities of long-term debt
Total long-term debt		$ 74.0			$ 112.0
May 2015 Euro medium term notes issued
Long-Term Debt
Principal amount | €				€ 1,750.0
August 2015 medium term notes issued
Long-Term Debt
Principal amount			$ 1,500.0
June 2014 medium term notes issued
Long-Term Debt
Principal amount							$ 950.0
November 2014 Euro medium term notes issued
Long-Term Debt
Principal amount | €						€ 1,250.0
Eurobond 600 Million Euros Issued November 2013
Long-Term Debt
Principal amount | €								€ 600.0

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Pension and Postretirement Benefit Plans - Narrative (Details) $ in Millions	1 Months Ended		3 Months Ended				12 Months Ended
	Aug. 31, 2015	Mar. 31, 2015	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Mar. 31, 2014 item	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2011 item
Benefit Plan Information
Number of insurers 3M and certain benefit plans filed lawsuits on seeking insurance coverage for the WG Trading Company claim | item						5
3M Japan company provided contribution match to their defined contribution plan		6.12%
Curtailment gain related to 3M Japan defined pension plan modification							$ 17
Projected benefit obligation (PBO) term vested 2014 liability reduction estimate					$ 270			$ 266
Pension benefit obligation (PBO) term vested liability reduction as percent of term vested eligible					34.00%
Pension benefit obligation (PBO) term vested liability reduction as percent of overall U.S. pension PBO liability					2.00%
Pension expense impact to income statement in 2014 from Lump Sum Payout					$ 0
Number of additional limited partners of WG Trading Company, in addition to 3M, who objected and appealed the court's order to the United States Court of Appeals for the Second Circuit | item									6
Percentage of WG Trading Company holdings in relation to total fair value of the company's total plan assets, high end of range (as a percent)			0.50%				0.50%
Original Percentage Medical Inflation Indexation By Company In Year	3.00%
Revised Percentage Medical Inflation Indexation By Company In Year	1.50%
Decrease In Projected Pension Obligation Liability Due To Retiree Welfare Benefit Plan Remeasurement				$ 233
Distribution of benefical interest to participants due to plan termination			$ 16
Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions year to date							$ 264	210
United States Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions year to date							113	45
Projected benefit obligation (PBO) increase due to mortality table update								820
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions year to date							151	165
Postretirement Benefits
Benefit Plan Information
Company contributions year to date							$ 3	5
Projected benefit obligation (PBO) increase due to mortality table update								$ 100

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Pension and Postretirement Benefit Plans - Components of net periodic benefit cost and other information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
United States Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	$ 293	$ 241	$ 258
Interest cost	655	676	598
Expected return on plan assets	(1,069)	(1,043)	(1,046)
Amortization of prior service cost (benefit)	(24)	4	5
Amortization of net actuarial (gain) loss	409	243	399
Net periodic benefit cost (benefit)	264	121	214
Defined Benefit Plan Recognized Net Gain Loss Due To Settlements And Curtailments 1	2
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	266	121	214
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Prior service cost (benefit)		(266)
Amortization of prior service cost (benefit)	24	(4)	(5)
Net actuarial (gain) loss	312	2,167	(743)
Amortization of net actuarial (gain) loss	(409)	(243)	(399)
Total recognized in other comprehensive income (loss)	(73)	1,654	(1,147)
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	193	1,775	(933)
International Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	154	141	147
Interest cost	206	252	238
Expected return on plan assets	(308)	(312)	(291)
Amortization of transition (asset) obligation	(1)	(1)	(1)
Amortization of prior service cost (benefit)	(13)	(16)	(16)
Amortization of net actuarial (gain) loss	144	121	153
Net periodic benefit cost (benefit)	182	185	230
Defined Benefit Plan Recognized Net Gain Loss Due To Settlements And Curtailments 1	(6)	4	2
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	176	189	232
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition (asset) obligation	1	1	1
Prior service cost (benefit)	10	3	3
Amortization of prior service cost (benefit)	13	16	16
Net actuarial (gain) loss	(270)	592	(294)
Amortization of net actuarial (gain) loss	(144)	(121)	(153)
Foreign currency	(174)	(215)	(47)
Total recognized in other comprehensive income (loss)	(564)	276	(474)
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	(388)	465	(242)
Postretirement Benefits
Net periodic benefit cost (benefit)
Service cost	75	65	80
Interest cost	98	97	88
Expected return on plan assets	(91)	(90)	(90)
Amortization of prior service cost (benefit)	(42)	(47)	(66)
Amortization of net actuarial (gain) loss	73	56	95
Net periodic benefit cost (benefit)	113	81	107
Defined Benefit Plan Recognized Net Gain Loss Due To Settlements And Curtailments 1	1
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	114	81	107
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Prior service cost (benefit)	(212)		(20)
Amortization of prior service cost (benefit)	42	47	66
Net actuarial (gain) loss	(23)	358	(313)
Amortization of net actuarial (gain) loss	(73)	(56)	(95)
Foreign currency	(1)	(1)	(2)
Total recognized in other comprehensive income (loss)	(267)	348	(364)
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	$ (153)	$ 429	$ (257)

XML

Pension and Postretirement Benefit Plans (Narratives) (Details 2) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) country plan	Dec. 31, 2014 USD ($)
Benefit Plan Information
Maximum amount of certain nonqualified unfunded pension and postretirement benefit plans obligations not included in benefit obligation reconciliation | $	$ 35	$ 35
Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company-sponsored retirement plans, minimum number of worldwide plans | plan	80
Company-sponsored retirement plans, number of countries | country	28
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company-sponsored retirement plans, minimum number of international plans | plan	70
Company-sponsored retirement plans, number of countries | country	27

XML

Pension and Postretirement Benefit Plans (Narratives) (Details 3) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S. Defined Contribution Plan
Schedule Of Defined Contribution Plans Disclosures
Company match of eligible compensation, high end of range		6.00%
Company match of eligible compensation, percent for employees hired on or after January 1, 2009	5.00%	100.00%
Company contribution to employer retirement income account for employees hired on or after January 1, 2009		3.00%
Expenses related to defined contribution plans		$ 165	$ 153	$ 136
U.S. Defined Contribution Plan | Maximum
Schedule Of Defined Contribution Plans Disclosures
Employer match of employee contributions, pre January 1, 2009	60.00%	75.00%
U.S. Defined Contribution Plan | Minimum
Schedule Of Defined Contribution Plans Disclosures
Employer match of employee contributions, pre January 1, 2009	45.00%	60.00%
Foreign Defined Contribution Plan
Schedule Of Defined Contribution Plans Disclosures
Expenses related to defined contribution plans		$ 77	$ 75	$ 71

XML

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	$ 188	$ 46
Accrued benefit cost
Current liabilities	(60)	(60)
Non-current liabilities	(3,520)	(3,843)
Qualified and Non-qualified Pension Benefits
Change in plan assets
Company contributions	264	210
United States Qualified and Non-qualified Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year	16,452	13,967
Service cost	293	241	$ 258
Interest cost	655	676	598
Plan amendments		(266)
Actuarial (gain) loss	(657)	2,874
Benefit payments	(874)	(1,039)
Settlements, curtailments, special termination benefits and other	(13)	(1)
Benefit obligation at end of year	15,856	16,452	13,967
Change in plan assets
Fair value, beginning balance	14,643	13,889
Actual return on plan assets	100	1,749
Company contributions	113	45
Benefit payments	(874)	(1,039)
Settlements, curtailments, special termination benefits and other	(16)	(1)
Fair value, ending balance	13,966	14,643	13,889
Funded status at end of year	(1,890)	(1,809)
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	3	3
Accrued benefit cost
Current liabilities	(47)	(46)
Non-current liabilities	(1,846)	(1,766)
Ending balance	(1,890)	(1,809)
Amounts recognized in accumulated other comprehensive income
Net actuarial loss (gain)	5,366	5,462
Prior service cost (credit)	(227)	(251)
Ending balance	5,139	5,211
Accumulated benefit obligations in excess of plan assets
Projected benefit obligation	15,856	16,435
Accumulated benefit obligation	14,834	15,319
Fair value of plan assets	13,966	14,623
Total Accumulated Benefit Obligation	14,834	15,335
International Qualified and Non-qualified Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year	6,979	6,346
Acquisitions	94
Service cost	154	141	147
Interest cost	206	252	238
Participant contributions	9	10
Foreign exchange rate changes	(589)	(663)
Plan amendments	(6)	3
Actuarial (gain) loss	(274)	1,128
Benefit payments	(232)	(235)
Settlements, curtailments, special termination benefits and other	(19)	(3)
Benefit obligation at end of year	6,322	6,979	6,346
Change in plan assets
Fair value, beginning balance	5,957	5,758
Acquisitions	8
Actual return on plan assets	287	813
Company contributions	151	165
Participant contributions	9	10
Foreign exchange rate changes	(498)	(554)
Benefit payments	(232)	(235)
Settlements, curtailments, special termination benefits and other	(13)
Fair value, ending balance	5,669	5,957	5,758
Funded status at end of year	(653)	(1,022)
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	185	43
Accrued benefit cost
Current liabilities	(10)	(10)
Non-current liabilities	(828)	(1,055)
Ending balance	(653)	(1,022)
Amounts recognized in accumulated other comprehensive income
Net transition obligation (asset)	(2)	(3)
Net actuarial loss (gain)	1,610	2,200
Prior service cost (credit)	(68)	(93)
Ending balance	1,540	2,104
Accumulated benefit obligations in excess of plan assets
Projected benefit obligation	2,382	2,588
Accumulated benefit obligation	2,149	2,335
Fair value of plan assets	1,566	1,636
Total Accumulated Benefit Obligation	5,773	6,401
Postretirement Benefits
Change in benefit obligation
Benefit obligation at beginning of year	2,462	2,017
Service cost	75	65	80
Interest cost	98	97	88
Participant contributions	14	18
Foreign exchange rate changes	(22)	(11)
Plan amendments	(211)
Actuarial (gain) loss	(80)	415
Medicare Part D Reimbursement	1	1
Benefit payments	(122)	(140)
Settlements, curtailments, special termination benefits and other	1
Benefit obligation at end of year	2,216	2,462	2,017
Change in plan assets
Fair value, beginning balance	1,436	1,405
Actual return on plan assets	36	148
Company contributions	3	5
Participant contributions	14	18
Benefit payments	(122)	(140)
Fair value, ending balance	1,367	1,436	$ 1,405
Funded status at end of year	(849)	(1,026)
Accrued benefit cost
Current liabilities	(3)	(4)
Non-current liabilities	(846)	(1,022)
Ending balance	(849)	(1,026)
Amounts recognized in accumulated other comprehensive income
Net actuarial loss (gain)	815	914
Prior service cost (credit)	(270)	(102)
Ending balance	$ 545	$ 812

XML

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions	$ 264	$ 210
Qualified and Non-qualified Pension Benefits | Maximum
Company's assumption for the expected return on plan assets
Estimated pension contributions for next fiscal year	200
Qualified and Non-qualified Pension Benefits | Minimum
Company's assumption for the expected return on plan assets
Estimated pension contributions for next fiscal year	100
United States Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions	113	$ 45
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of prior service cost (benefit)	(24)
Amortization of net actuarial (gain) loss	354
Total amortization expected over the next fiscal year	$ 330
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.47%	4.10%	4.98%
Compensation rate increase	4.10%	4.10%	4.00%
Percentage increase (decrease) in discount rate obligation from the prior year	0.37%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	4.10%	4.98%	4.14%
Expected return on assets	7.75%	7.75%	8.00%
Compensation rate increase	4.10%	4.00%	4.00%
United States Qualified and Non-qualified Pension Benefits | Global equity
Asset Allocation assumption
Asset allocation assumption for next fiscal year	25.00%
United States Qualified Pension Benefits
Weighted-average assumptions used to determine net cost for years ended
Percentage increase (decrease) in expected return on assets in next fiscal year from the prior year	(0.25%)
Company's assumption for the expected return on plan assets
Expected return on assets for next fiscal year	7.50%
Rate of return on plan assets	0.70%	13.00%	6.00%
Average annual actual return on plan assets over the past 10 years	7.80%
Average annual actual return on plan assets over the past 25 years	10.00%
United States Qualified Pension Benefits | Private equity
Asset Allocation assumption
Asset allocation assumption for next fiscal year	18.00%
United States Qualified Pension Benefits | Fixed income
Asset Allocation assumption
Asset allocation assumption for next fiscal year	41.00%
United States Qualified Pension Benefits | Absolute return
Asset Allocation assumption
Asset allocation assumption for next fiscal year	16.00%
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions	$ 151	$ 165
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of transition (asset) obligation	(1)
Amortization of prior service cost (benefit)	(13)
Amortization of net actuarial (gain) loss	90
Total amortization expected over the next fiscal year	$ 76
Weighted-average assumptions used to determine benefit obligations
Discount rate	3.12%	3.11%	4.02%
Compensation rate increase	2.90%	3.33%	3.35%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	3.11%	4.02%	3.78%
Expected return on assets	5.90%	5.83%	5.87%
Compensation rate increase	3.33%	3.35%	3.31%
Postretirement Benefits
Benefit Plan Information
Company contributions	$ 3	$ 5
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of prior service cost (benefit)	(55)
Amortization of net actuarial (gain) loss	62
Total amortization expected over the next fiscal year	$ 7
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.48%	4.07%	4.83%
Percentage increase (decrease) in discount rate obligation from the prior year	0.41%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	4.07%	4.83%	4.00%
Expected return on assets	6.91%	7.11%	7.19%

XML

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 4) $ in Millions	Dec. 31, 2015 USD ($)
United States Qualified and Non-qualified Pension Benefits
Future Pension and Postretirement Benefit Payments
2016 Benefit Payments	$ 987
2017 Benefit Payments	997
2018 Benefit Payments	1,008
2019 Benefit Payments	1,017
2020 Benefit Payments	1,029
Following five years	5,187
International Qualified and Non-qualified Pension Benefits
Future Pension and Postretirement Benefit Payments
2016 Benefit Payments	205
2017 Benefit Payments	215
2018 Benefit Payments	228
2019 Benefit Payments	241
2020 Benefit Payments	250
Following five years	1,480
Postretirement Benefits
Future Pension and Postretirement Benefit Payments
2016 Benefit Payments	141
2017 Benefit Payments	156
2018 Benefit Payments	172
2019 Benefit Payments	153
2020 Benefit Payments	155
Following five years	$ 797

XML

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 5) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
United States Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Total, before other items to reconcile	$ 14,125	$ 14,818
Other items to reconcile to fair value of plan assets	(159)	(175)
Fair value of plan assets	13,966	14,643	$ 13,889
United States Qualified and Non-qualified Pension Benefits | Level 1
Benefit Plan Information
Total, before other items to reconcile	4,532	4,367
United States Qualified and Non-qualified Pension Benefits | Level 2
Benefit Plan Information
Total, before other items to reconcile	4,113	4,699
United States Qualified and Non-qualified Pension Benefits | Level 3
Benefit Plan Information
Total, before other items to reconcile	(106)	(74)
United States Qualified and Non-qualified Pension Benefits | Global equity
Benefit Plan Information
Total, before other items to reconcile	3,624	3,587
United States Qualified and Non-qualified Pension Benefits | Global equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	3,046	2,980
United States Qualified and Non-qualified Pension Benefits | U.S. equities
Benefit Plan Information
Total, before other items to reconcile	1,897	1,766
United States Qualified and Non-qualified Pension Benefits | U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,897	1,766
United States Qualified and Non-qualified Pension Benefits | Non-U.S. equities
Benefit Plan Information
Total, before other items to reconcile	1,149	1,214
United States Qualified and Non-qualified Pension Benefits | Non-U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,149	1,214
United States Qualified and Non-qualified Pension Benefits | Index and long/short equity
Benefit Plan Information
Total, before other items to reconcile	578	607
United States Qualified and Non-qualified Pension Benefits | Fixed income
Benefit Plan Information
Total, before other items to reconcile	5,184	5,652
United States Qualified and Non-qualified Pension Benefits | Fixed income | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,107	1,059
United States Qualified and Non-qualified Pension Benefits | Fixed income | Level 2
Benefit Plan Information
Total, before other items to reconcile	4,066	4,561
United States Qualified and Non-qualified Pension Benefits | U.S. government securities
Benefit Plan Information
Total, before other items to reconcile	1,551	1,622
United States Qualified and Non-qualified Pension Benefits | U.S. government securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,095	1,032
United States Qualified and Non-qualified Pension Benefits | U.S. government securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	456	590
United States Qualified and Non-qualified Pension Benefits | Foreign government agency securities
Benefit Plan Information
Total, before other items to reconcile	126	388
United States Qualified and Non-qualified Pension Benefits | Foreign government agency securities | Level 1
Benefit Plan Information
Total, before other items to reconcile		7
United States Qualified and Non-qualified Pension Benefits | Foreign government agency securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	126	381
United States Qualified and Non-qualified Pension Benefits | Preferred and convertible securities
Benefit Plan Information
Total, before other items to reconcile	12	15
United States Qualified and Non-qualified Pension Benefits | Preferred and convertible securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	4	6
United States Qualified and Non-qualified Pension Benefits | Preferred and convertible securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	8	9
United States Qualified and Non-qualified Pension Benefits | U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	2,829	2,897
United States Qualified and Non-qualified Pension Benefits | U.S. corporate bonds | Level 1
Benefit Plan Information
Total, before other items to reconcile	9	8
United States Qualified and Non-qualified Pension Benefits | U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	2,820	2,889
United States Qualified and Non-qualified Pension Benefits | Non-U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	616	566
United States Qualified and Non-qualified Pension Benefits | Non-U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	616	566
United States Qualified and Non-qualified Pension Benefits | Other
Benefit Plan Information
Total, before other items to reconcile	11	32
United States Qualified and Non-qualified Pension Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	39	132
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 1
Benefit Plan Information
Total, before other items to reconcile	(1)	6
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 2
Benefit Plan Information
Total, before other items to reconcile	40	126
United States Qualified and Non-qualified Pension Benefits | Private equity
Benefit Plan Information
Total, before other items to reconcile	2,368	2,502
United States Qualified and Non-qualified Pension Benefits | Private equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	24	15
United States Qualified and Non-qualified Pension Benefits | Private equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	(106)	(74)
United States Qualified and Non-qualified Pension Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	(106)	(74)
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 3
Benefit Plan Information
Total, before other items to reconcile	(106)	(74)
United States Qualified and Non-qualified Pension Benefits | Growth equity
Benefit Plan Information
Total, before other items to reconcile	24	15
United States Qualified and Non-qualified Pension Benefits | Growth equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	24	15
United States Qualified and Non-qualified Pension Benefits | Partnership investments
Benefit Plan Information
Total, before other items to reconcile	2,450	2,561
United States Qualified and Non-qualified Pension Benefits | Absolute return
Benefit Plan Information
Total, before other items to reconcile	2,058	2,173
United States Qualified and Non-qualified Pension Benefits | Absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	253	26
United States Qualified and Non-qualified Pension Benefits | Absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	41	52
United States Qualified and Non-qualified Pension Benefits | Hedge fund/fund of funds
Benefit Plan Information
Total, before other items to reconcile	1,409	1,807
United States Qualified and Non-qualified Pension Benefits | Fixed income and other
Benefit Plan Information
Total, before other items to reconcile	299	78
United States Qualified and Non-qualified Pension Benefits | Fixed income and other | Level 1
Benefit Plan Information
Total, before other items to reconcile	253	26
United States Qualified and Non-qualified Pension Benefits | Fixed income and other | Level 2
Benefit Plan Information
Total, before other items to reconcile	46	52
United States Qualified and Non-qualified Pension Benefits | Partnership investments - absolute return
Benefit Plan Information
Total, before other items to reconcile	355	288
United States Qualified and Non-qualified Pension Benefits | Derivatives - absolute return
Benefit Plan Information
Total, before other items to reconcile	(5)
United States Qualified and Non-qualified Pension Benefits | Derivatives - absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	(5)
United States Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalent
Benefit Plan Information
Total, before other items to reconcile	891	904
United States Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalent | Level 1
Benefit Plan Information
Total, before other items to reconcile	102	287
United States Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalent | Level 2
Benefit Plan Information
Total, before other items to reconcile	6	86
United States Qualified and Non-qualified Pension Benefits | Cash and cash equivalents
Benefit Plan Information
Total, before other items to reconcile	108	373
United States Qualified and Non-qualified Pension Benefits | Cash and cash equivalents | Level 1
Benefit Plan Information
Total, before other items to reconcile	102	287
United States Qualified and Non-qualified Pension Benefits | Cash and cash equivalents | Level 2
Benefit Plan Information
Total, before other items to reconcile	6	86
United States Qualified and Non-qualified Pension Benefits | Cash and cash equivalents valued at net asset value [Member]
Benefit Plan Information
Total, before other items to reconcile	783	531
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Total, before other items to reconcile	5,697	5,998
Other items to reconcile to fair value of plan assets	(28)	(41)
Fair value of plan assets	5,669	5,957	5,758
International Qualified and Non-qualified Pension Benefits | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,681	1,583
International Qualified and Non-qualified Pension Benefits | Level 2
Benefit Plan Information
Total, before other items to reconcile	2,477	2,767
International Qualified and Non-qualified Pension Benefits | Level 3
Benefit Plan Information
Total, before other items to reconcile	481	502
International Qualified and Non-qualified Pension Benefits | Global equity
Benefit Plan Information
Total, before other items to reconcile	2,157	2,131
International Qualified and Non-qualified Pension Benefits | Global equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,243	1,286
International Qualified and Non-qualified Pension Benefits | Global equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	893	823
International Qualified and Non-qualified Pension Benefits | Global equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	4
International Qualified and Non-qualified Pension Benefits | Growth equities
Benefit Plan Information
Total, before other items to reconcile	913	848
International Qualified and Non-qualified Pension Benefits | Growth equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	718	672
International Qualified and Non-qualified Pension Benefits | Growth equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	195	176
International Qualified and Non-qualified Pension Benefits | Value equities
Benefit Plan Information
Total, before other items to reconcile	521	618
International Qualified and Non-qualified Pension Benefits | Value equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	494	595
International Qualified and Non-qualified Pension Benefits | Value equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	27	23
International Qualified and Non-qualified Pension Benefits | Core equities
Benefit Plan Information
Total, before other items to reconcile	706	647
International Qualified and Non-qualified Pension Benefits | Core equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	31	19
International Qualified and Non-qualified Pension Benefits | Core equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	671	624
International Qualified and Non-qualified Pension Benefits | Core equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	4
International Qualified and Non-qualified Pension Benefits | Equities valued at net asset value
Benefit Plan Information
Total, before other items to reconcile	17	18
International Qualified and Non-qualified Pension Benefits | Fixed income
Benefit Plan Information
Total, before other items to reconcile	2,310	2,915
International Qualified and Non-qualified Pension Benefits | Fixed income | Level 1
Benefit Plan Information
Total, before other items to reconcile	313	133
International Qualified and Non-qualified Pension Benefits | Fixed income | Level 2
Benefit Plan Information
Total, before other items to reconcile	1,213	1,904
International Qualified and Non-qualified Pension Benefits | Fixed income | Level 3
Benefit Plan Information
Total, before other items to reconcile	14	15
International Qualified and Non-qualified Pension Benefits | Domestic government debt
Benefit Plan Information
Total, before other items to reconcile	633	623
International Qualified and Non-qualified Pension Benefits | Domestic government debt | Level 1
Benefit Plan Information
Total, before other items to reconcile	283	87
International Qualified and Non-qualified Pension Benefits | Domestic government debt | Level 2
Benefit Plan Information
Total, before other items to reconcile	346	533
International Qualified and Non-qualified Pension Benefits | Domestic government debt | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	3
International Qualified and Non-qualified Pension Benefits | Foreign government agency securities
Benefit Plan Information
Total, before other items to reconcile	206	715
International Qualified and Non-qualified Pension Benefits | Foreign government agency securities | Level 1
Benefit Plan Information
Total, before other items to reconcile		45
International Qualified and Non-qualified Pension Benefits | Foreign government agency securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	206	670
International Qualified and Non-qualified Pension Benefits | Corporate debt securities
Benefit Plan Information
Total, before other items to reconcile	701	714
International Qualified and Non-qualified Pension Benefits | Corporate debt securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	30	1
International Qualified and Non-qualified Pension Benefits | Corporate debt securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	661	701
International Qualified and Non-qualified Pension Benefits | Corporate debt securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	10	12
International Qualified and Non-qualified Pension Benefits | Fixed income securities valued at net asset value [Member]
Benefit Plan Information
Total, before other items to reconcile	770	863
International Qualified and Non-qualified Pension Benefits | Private equity
Benefit Plan Information
Total, before other items to reconcile	160	154
International Qualified and Non-qualified Pension Benefits | Private equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	3
International Qualified and Non-qualified Pension Benefits | Private equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	5	5
International Qualified and Non-qualified Pension Benefits | Private equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	4
International Qualified and Non-qualified Pension Benefits | Real estate
Benefit Plan Information
Total, before other items to reconcile	10	12
International Qualified and Non-qualified Pension Benefits | Real estate | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	3
International Qualified and Non-qualified Pension Benefits | Real estate | Level 2
Benefit Plan Information
Total, before other items to reconcile	5	5
International Qualified and Non-qualified Pension Benefits | Real estate | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	4
International Qualified and Non-qualified Pension Benefits | Real estate valued at net asset value
Benefit Plan Information
Total, before other items to reconcile	126	119
International Qualified and Non-qualified Pension Benefits | Partnership investments
Benefit Plan Information
Total, before other items to reconcile	24	23
International Qualified and Non-qualified Pension Benefits | Absolute return
Benefit Plan Information
Total, before other items to reconcile	596	605
International Qualified and Non-qualified Pension Benefits | Absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	(2)
International Qualified and Non-qualified Pension Benefits | Absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	19	6
International Qualified and Non-qualified Pension Benefits | Absolute return | Level 3
Benefit Plan Information
Total, before other items to reconcile	459	479
International Qualified and Non-qualified Pension Benefits | Insurance
Benefit Plan Information
Total, before other items to reconcile	456	476
International Qualified and Non-qualified Pension Benefits | Insurance | Level 3
Benefit Plan Information
Total, before other items to reconcile	456	476
International Qualified and Non-qualified Pension Benefits | Derivatives - absolute return
Benefit Plan Information
Total, before other items to reconcile	13	(4)
International Qualified and Non-qualified Pension Benefits | Derivatives - absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	(2)
International Qualified and Non-qualified Pension Benefits | Derivatives - absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	15	(4)
International Qualified and Non-qualified Pension Benefits | Other
Benefit Plan Information
Total, before other items to reconcile	7	13
International Qualified and Non-qualified Pension Benefits | Other | Level 2
Benefit Plan Information
Total, before other items to reconcile	4	10
International Qualified and Non-qualified Pension Benefits | Other | Level 3
Benefit Plan Information
Total, before other items to reconcile	3	3
International Qualified and Non-qualified Pension Benefits | Other valued at net asset value
Benefit Plan Information
Total, before other items to reconcile	1	3
International Qualified and Non-qualified Pension Benefits | Hedge funds
Benefit Plan Information
Total, before other items to reconcile	119	117
International Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalent
Benefit Plan Information
Total, before other items to reconcile	474	193
International Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalent | Level 1
Benefit Plan Information
Total, before other items to reconcile	126	161
International Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalent | Level 2
Benefit Plan Information
Total, before other items to reconcile	347	29
International Qualified and Non-qualified Pension Benefits | Cash and cash equivalents
Benefit Plan Information
Total, before other items to reconcile	473	190
International Qualified and Non-qualified Pension Benefits | Cash and cash equivalents | Level 1
Benefit Plan Information
Total, before other items to reconcile	126	161
International Qualified and Non-qualified Pension Benefits | Cash and cash equivalents | Level 2
Benefit Plan Information
Total, before other items to reconcile	347	29
International Qualified and Non-qualified Pension Benefits | Cash and cash equivalents valued at net asset value [Member]
Benefit Plan Information
Total, before other items to reconcile	1	3
Postretirement Benefits
Benefit Plan Information
Total, before other items to reconcile	1,358	1,428
Other items to reconcile to fair value of plan assets	9	8
Fair value of plan assets	$ 1,367	1,436	$ 1,405
Percentage of plan assets within 401h account	39.00%
Postretirement Benefits | Level 1
Benefit Plan Information
Total, before other items to reconcile	$ 687	724
Postretirement Benefits | Level 2
Benefit Plan Information
Total, before other items to reconcile	392	393
Postretirement Benefits | Level 3
Benefit Plan Information
Total, before other items to reconcile	(4)	(3)
Postretirement Benefits | Global equity
Benefit Plan Information
Total, before other items to reconcile	616	676
Postretirement Benefits | Global equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	567	621
Postretirement Benefits | U.S. equities
Benefit Plan Information
Total, before other items to reconcile	508	565
Postretirement Benefits | U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	508	565
Postretirement Benefits | Non-U.S. equities
Benefit Plan Information
Total, before other items to reconcile	59	56
Postretirement Benefits | Non-U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	59	56
Postretirement Benefits | Index and long/short equity
Benefit Plan Information
Total, before other items to reconcile	49	55
Postretirement Benefits | Fixed income
Benefit Plan Information
Total, before other items to reconcile	461	457
Postretirement Benefits | Fixed income | Level 1
Benefit Plan Information
Total, before other items to reconcile	71	68
Postretirement Benefits | Fixed income | Level 2
Benefit Plan Information
Total, before other items to reconcile	390	388
Postretirement Benefits | U.S. government securities
Benefit Plan Information
Total, before other items to reconcile	263	254
Postretirement Benefits | U.S. government securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	71	68
Postretirement Benefits | U.S. government securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	192	186
Postretirement Benefits | Foreign government agency securities
Benefit Plan Information
Total, before other items to reconcile	8	17
Postretirement Benefits | Foreign government agency securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	8	17
Postretirement Benefits | U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	153	146
Postretirement Benefits | U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	153	146
Postretirement Benefits | Non-U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	35	34
Postretirement Benefits | Non-U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	35	34
Postretirement Benefits | Other
Benefit Plan Information
Total, before other items to reconcile		1
Postretirement Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	2	5
Postretirement Benefits | Derivative instruments | Level 2
Benefit Plan Information
Total, before other items to reconcile	2	5
Postretirement Benefits | Private equity
Benefit Plan Information
Total, before other items to reconcile	133	160
Postretirement Benefits | Private equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	1
Postretirement Benefits | Private equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	(4)	(3)
Postretirement Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	(4)	(3)
Postretirement Benefits | Derivative instruments | Level 3
Benefit Plan Information
Total, before other items to reconcile	(4)	(3)
Postretirement Benefits | Growth equity
Benefit Plan Information
Total, before other items to reconcile	1	1
Postretirement Benefits | Growth equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	1
Postretirement Benefits | Partnership investments
Benefit Plan Information
Total, before other items to reconcile	136	162
Postretirement Benefits | Absolute return
Benefit Plan Information
Total, before other items to reconcile	80	79
Postretirement Benefits | Absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	10	1
Postretirement Benefits | Absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	2	2
Postretirement Benefits | Hedge fund/fund of funds
Benefit Plan Information
Total, before other items to reconcile	54	66
Postretirement Benefits | Fixed income and other
Benefit Plan Information
Total, before other items to reconcile	12	3
Postretirement Benefits | Fixed income and other | Level 1
Benefit Plan Information
Total, before other items to reconcile	10	1
Postretirement Benefits | Fixed income and other | Level 2
Benefit Plan Information
Total, before other items to reconcile	2	2
Postretirement Benefits | Partnership investments - absolute return
Benefit Plan Information
Total, before other items to reconcile	14	10
Postretirement Benefits | Cash and Cash Equivalent
Benefit Plan Information
Total, before other items to reconcile	68	56
Postretirement Benefits | Cash and Cash Equivalent | Level 1
Benefit Plan Information
Total, before other items to reconcile	38	33
Postretirement Benefits | Cash and Cash Equivalent | Level 2
Benefit Plan Information
Total, before other items to reconcile		3
Postretirement Benefits | Cash and cash equivalents
Benefit Plan Information
Total, before other items to reconcile	38	36
Postretirement Benefits | Cash and cash equivalents | Level 1
Benefit Plan Information
Total, before other items to reconcile	38	33
Postretirement Benefits | Cash and cash equivalents | Level 2
Benefit Plan Information
Total, before other items to reconcile		3
Postretirement Benefits | Cash and cash equivalents valued at net asset value [Member]
Benefit Plan Information
Total, before other items to reconcile	$ 30	$ 20

XML

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 6) - International Qualified and Non-qualified Pension Benefits - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Benefit Plan Information
Foreign currency exchange	$ (498)	$ (554)
Level 3
Benefit Plan Information
Foreign currency exchange	(36)	(62)
Defined benefit plan increases related to net purchases and unrealized gains losses	$ 16	$ 46

XML

Derivatives - Cash Flow Hedges (Details) € in Millions, $ in Millions, ₩ in Billions	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2014 USD ($)	Jun. 30, 2014	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 KRW (₩)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 EUR (€)	Nov. 30, 2014 EUR (€)	Nov. 30, 2014 USD ($)
November 2014 Euro medium term notes issued
Derivatives in Cash Flow Hedging Relationships
Principal amount | €										€ 1,250.0
Fixed rate Euro Medium term note due 2026
Derivatives in Cash Flow Hedging Relationships
Principal amount | €							€ 750.0
Foreign currency forward contracts
Derivatives in Cash Flow Hedging Relationships
Derivative notional amount | ₩						₩ 248
Cash flow hedge
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative			$ 212	$ 171	$ (98)
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges								$ 124
After-tax net unrealized gain (loss) anticipated to be reclassifed from AOCI to the income statement within next twelve months			98
After-tax net unrealized gain (loss) anticipated to be reclassifed from AOCI to the Income Statement in 2017			23
After-tax unrealized gain (loss) anticipated to be reclassifed from AOCI to the Income Statement after 2017			3
Gain (Loss) on Hedged Item Recognized in Income			$ 174	4	(122)
Cash flow hedge | Foreign currency forward/option contracts
Derivatives in Cash Flow Hedging Relationships
Maximum length of time hedged in cash flow hedge		24 months	36 months
Maximum length of time hedged in cash flow hedge prior to current period		12 months
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative			$ 212	183	9
Cash flow hedge | Foreign currency forward/option contracts | Cost of sales
Derivatives in Cash Flow Hedging Relationships
Gain (Loss) on Hedged Item Recognized in Income			178	3	(11)
Cash flow hedge | Interest rate swap contracts
Derivatives in Cash Flow Hedging Relationships
Derivative notional amount | €									€ 500.0
Term of derivative contract	12 years
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative				(8)
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges								$ (5)			$ (5)
Gain (Loss) on Hedged Item Recognized in Income	$ (8)
Cash flow hedge | Interest rate swap contracts | Fixed rate Euro Medium term note due 2026
Derivatives in Cash Flow Hedging Relationships
Principal amount | €										€ 750.0
Term of debt instrument	12 years
Cash flow hedge | Interest rate swap contracts | Interest expense
Derivatives in Cash Flow Hedging Relationships
Gain (Loss) on Hedged Item Recognized in Income			(2)	(1)	(1)
Cash flow hedge | Commodity price swap contracts
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative				(4)	1
Cash flow hedge | Commodity price swap contracts | Cost of sales
Derivatives in Cash Flow Hedging Relationships
Gain (Loss) on Hedged Item Recognized in Income			$ (2)	$ 2	(2)
Cash flow hedge | Foreign currency forward contracts
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative					(108)
Cash flow hedge | Foreign currency forward contracts | Interest expense
Derivatives in Cash Flow Hedging Relationships
Gain (Loss) on Hedged Item Recognized in Income					$ (108)

XML

Derivatives - Fair Value Hedges (Details) € in Millions, $ in Millions	1 Months Ended		12 Months Ended
	Aug. 31, 2015 USD ($) DerivativeInstrument	Jul. 31, 2007 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jul. 31, 2014 EUR (€)	Jun. 30, 2014 USD ($)	Nov. 30, 2013 EUR (€)	Aug. 31, 2010 EUR (€)
Derivatives in Fair Value Hedging Relationships
Number Of Interest Rate Swap Contracts Entered In Period | DerivativeInstrument	2
Fixed rate medium term note due 2019
Derivatives in Fair Value Hedging Relationships
Face amount			$ 25.0				$ 625.0
Fixed rate medium term note due 2020
Derivatives in Fair Value Hedging Relationships
Face amount			200.0
Fixed rate medium term note due 2025
Derivatives in Fair Value Hedging Relationships
Face amount			550.0
August 2015 medium term notes issued
Derivatives in Fair Value Hedging Relationships
Face amount	$ 1,500.0
June 2014 medium term notes issued
Derivatives in Fair Value Hedging Relationships
Face amount							950.0
Interest rate swap contracts | Fixed rate medium term note due 2018
Derivatives in Fair Value Hedging Relationships
Derivative notional amount	$ 450.0
Term of debt instrument	3 years
Interest rate swap contracts | Fixed rate medium term note due 2020
Derivatives in Fair Value Hedging Relationships
Derivative notional amount	$ 300.0
Term of debt instrument	5 years
Fair value hedges | Interest rate swap contracts | Eurobond repaid July 2014
Derivatives in Fair Value Hedging Relationships
Derivative notional amount | €		€ 400
Term of debt instrument		7 years
Face amount | €		€ 750
Termination of notional amount of fixed-to-floating interest rate swap | €									€ 150
Gain (loss) on termination of fixed-to-floating interest rate swap will be amortized over this debt's remaining life | €									€ 18
Remaining amount matured from Interest Rate Swap | €						€ 250
Fair value hedges | Interest rate swap contracts | Eurobond Due 2021
Derivatives in Fair Value Hedging Relationships
Derivative notional amount | €								€ 300
Face amount | €								€ 600
Fair value hedges | Interest rate swap contracts | Fixed rate medium term note due 2019
Derivatives in Fair Value Hedging Relationships
Derivative notional amount							$ 600.0
Derivatives designated as hedging instruments | Fair value hedges
Derivatives in Fair Value Hedging Relationships
Gain (Loss) on Derivative Recognized in income			(2.0)	$ 11.0	$ (21.0)
Gain (Loss) on Hedged Item Recognized in Income			2.0	(11.0)	21.0
Derivatives designated as hedging instruments | Fair value hedges | Interest rate swap contracts | Interest expense
Derivatives in Fair Value Hedging Relationships
Gain (Loss) on Derivative Recognized in income			(2.0)	11.0	(21.0)
Gain (Loss) on Hedged Item Recognized in Income			$ 2.0	$ (11.0)	$ 21.0

XML

Derivatives - Net Investment Hedges (Details) € in Millions, ₩ in Billions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 KRW (₩)	Dec. 31, 2015 EUR (€)
Foreign currency forward contracts
Net investment hedges
Derivative notional amount | ₩				₩ 248
Foreign Currency Denominated Debt
Net investment hedges
Face amount of debt designated as a net investment hedge | €					€ 3,600
Net Investment Hedges
Net investment hedges
Effective portion of net investment hedge reclassified out of other comprehensive income into income	$ 0
Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument	206,000,000	$ 246,000,000	$ (70,000,000)
Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income	11,000,000	1,000,000
Net Investment Hedges | Foreign currency forward contracts
Net investment hedges
Derivative notional amount | €					€ 974
Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument	143,000,000	94,000,000	12,000,000
Net Investment Hedges | Foreign currency forward contracts | Cost of sales
Net investment hedges
Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income	11,000,000	1,000,000
Net Investment Hedges | Foreign Currency Denominated Debt
Net investment hedges
Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument	$ 63,000,000	$ 152,000,000	$ (82,000,000)

XML

Derivatives - Not Designated (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ (28)	$ (30)	$ (24)
Foreign currency forward/option contracts | Cost of sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	5	10	20
Foreign currency forward contracts | Interest expense
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	(30)	$ (40)	(43)
Commodity price swap contracts | Cost of sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$ (3)		$ (1)

XML

Derivatives - BS Location (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	$ 296	$ 256
Fair Value of Derivative Instruments, Liabilities	69	43
Derivatives designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	233	190
Fair Value of Derivative Instruments, Liabilities	18	10
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	148	116
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	61	47
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	14	2
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	3	1
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Current balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	2,815	1,865
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Noncurrent balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	1,240	656
Derivatives designated as hedging instruments | Commodity price swap contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities		4
Derivatives designated as hedging instruments | Commodity price swap contracts | Current balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount		20
Derivatives designated as hedging instruments | Interest rate swap contracts | Other assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	24	27
Derivatives designated as hedging instruments | Interest rate swap contracts | Other liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	1	3
Derivatives designated as hedging instruments | Interest rate swap contracts | Noncurrent balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	1,753	1,003
Derivatives not designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	63	66
Fair Value of Derivative Instruments, Liabilities	51	33
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	63	66
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	51	33
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Current balance sheet location
Location and Fair Value Amount of Derivative Instruments
Derivative Notional Amount	$ 5,359	$ 6,582

XML

Derivatives - Offsetting Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Counterparty	Dec. 31, 2014 USD ($)
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties
Number of master netting agreements supported by primary counterparty's parent guarantee | Counterparty	1
Number of primary derivative counterparties | Counterparty	16
Number of credit support agreements by primary counterparty | Counterparty	15
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	$ 296	$ 256
Net Amounts of Derivative Assets	259	236
Derivatives Subject to Master Netting Agreements
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	296	256
Gross Amount of Eligible Offsetting Recognized Derivative Liabilities	37	20
Net Amounts of Derivative Assets	$ 259	$ 236

XML

Derivatives - Offsetting Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	$ 69	$ 43
Net Amount of Derivative Liabilities	32	23
Derivatives Subject to Master Netting Agreements
Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	64	36
Gross Amount of Eligible Offsetting Recognized Derivative Assets	37	20
Net Amount of Derivative Liabilities	27	16
Derivatives Not Subject to Master Netting Agreements
Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	5	7
Net Amount of Derivative Liabilities	$ 5	$ 7

XML

Derivatives - Currency Effects (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Foreign Currency [Abstract]
Year-on-year foreign currency transaction effects, including hedging impact, gain (loss) impact on pre-tax income	$ 180	$ 10

XML

Fair Value Measurements - Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	$ 127	$ 1,454
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	296	256
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	69	43
Fair value on a recurring basis | Foreign currency forward/option contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	272	229
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	68	36
Fair value on a recurring basis | Commodity price swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet		4
Fair value on a recurring basis | Interest rate swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	24	27
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	1	3
Fair value on a recurring basis | U.S. government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		108
Fair value on a recurring basis | Foreign government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	95
Fair value on a recurring basis | Corporate debt securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	619
Fair value on a recurring basis | Commercial paper
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	12
Fair value on a recurring basis | Certificates of deposit/time deposits
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	26	41
Fair value on a recurring basis | Asset-backed securities Automobile loan related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	26	282
Fair value on a recurring basis | Asset-backed securities Credit card related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	162
Fair value on a recurring basis | Asset-backed securities Equipment lease related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	2	48
Fair value on a recurring basis | Asset-backed securities Other asset-backed securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	19	46
Fair value on a recurring basis | U.S. treasury securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		38
Fair value on a recurring basis | U.S. municipal securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	12	15
Fair value on a recurring basis | Investments
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		1
Fair value on a recurring basis | Level 1 | U.S. treasury securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		38
Fair value on a recurring basis | Level 1 | Investments
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		1
Fair value on a recurring basis | Level 2 | Foreign currency forward/option contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	272	229
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	68	36
Fair value on a recurring basis | Level 2 | Commodity price swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet		4
Fair value on a recurring basis | Level 2 | Interest rate swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	24	27
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	1	3
Fair value on a recurring basis | Level 2 | U.S. government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		108
Fair value on a recurring basis | Level 2 | Foreign government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	95
Fair value on a recurring basis | Level 2 | Corporate debt securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	619
Fair value on a recurring basis | Level 2 | Commercial paper
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	12
Fair value on a recurring basis | Level 2 | Certificates of deposit/time deposits
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	26	41
Fair value on a recurring basis | Level 2 | Asset-backed securities Automobile loan related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	26	282
Fair value on a recurring basis | Level 2 | Asset-backed securities Credit card related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	10	162
Fair value on a recurring basis | Level 2 | Asset-backed securities Equipment lease related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	2	48
Fair value on a recurring basis | Level 2 | Asset-backed securities Other asset-backed securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	19	46
Fair value on a recurring basis | Level 3 | U.S. municipal securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	$ 12	$ 15

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Fair Value Measurements - Recurring Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of items measured at fair value on a recurring basis that used significant unobservable inputs (Level 3)
Balance at the beginning of the period	$ 15	$ 11	$ 7
Total gains or losses included in earnings	0	(1)	0
Total gains or losses included in other comprehensive income	0	2	4
Purchases and issuances	0	15	0
Sales and settlements	(3)	(12)	0
Transfers in and/or out of Level 3	0	0	0
Balance at the end of the period	$ 12	$ 15	$ 11

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Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fixed rate medium term note due 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Face Amount	$ 1,000
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Medium-term fixed rate note due September 2016 (long-term in 2014 and short-term in 2015)	999	$ 996
Long-term debt, excluding current portion and medium-term fixed rate note due September 2016	8,753	5,709
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Medium-term fixed rate note due September 2016 (long-term in 2014 and short-term in 2015)	1,003	1,014
Long-term debt, excluding current portion and medium-term fixed rate note due September 2016	$ 9,101	$ 6,189

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Commitments and Contingencies - Respirator and Environmental (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) g / l individual case item claim	Dec. 31, 2014 item
Respirator Mask/Asbestos Litigation
Loss contingencies
Total number of named claimants | item	2,130	2,220
Number of total claims settled and taken to trial | claim	10
Number of total claims settled and tried to verdict | claim	8
Number of total claims tried to verdict | claim	9
Number of total claims dismissed | claim	1
Increase in insurance liabilities	$ 50,000,000
Payments for fees and settlements related to litigation	46,000,000
Insurance receivables	$ 39,000,000
Respirator Mask/Asbestos Litigation - State of West Virginia
Loss contingencies
Number of additional defendants	2
Accrued loss contingency reserve	$ 0
Respirator Mask/Asbestos litigation - Excluding Aearo Technologies
Loss contingencies
Accrued loss contingency reserve	144,000,000
Respirator Mask/Asbestos Litigation - Aearo Technologies
Loss contingencies
Accrued loss contingency reserve	21,000,000
Quarterly fee paid to Cabot to retain responsibility and liability for products manufactured before July 11, 1995	$ 100,000
Number of underlying claims concerning whether they were Cabot's responsibility | claim	258
Outstanding issues remaining | case	2
Environmental Matters - Remediation
Loss contingencies
Accrued loss contingency reserve	$ 43,000,000
Insurance receivables	$ 11,000,000
Number of years remediation payments expected to be paid for applicable sites	20 years
Environmental Matters - Regulatory Activities
Loss contingencies
Number of years after phase-out decision in May 2000 that the Company stopped manufacturing and using vast majority of perfluorooctanyl compounds	2 years
Amount of PFOA in drinking water allowed per provisional health advisories in grams per liter | g / l	0.0000004
Amount of PFOS in drinking water allowed per provisional health advisories in grams per liter | g / l	0.0000002
Number of PFCs the EPA has required to have public water system suppliers monitor | item	6
Number of public water supplies the EPA reported results | item	4,764
Number of water supplies that reported above advisory level with PFOA | item	0
Number of water supplies that reported above advisory level with PFOS | item	17
Environmental Matters - Regulatory Activities | Alabama
Loss contingencies
Number of years covered by permit for sludge containing PFCs	20 years
Environmental Matters - Litigation
Loss contingencies
Number of local water works for whom the water authority supplies water | item	5
Environmental Matters - Litigation | Morgan County, Alabama
Loss contingencies
Total number of named claimants | individual	3
Environmental Matters - Litigation | Metropolitan Council, Minnesota
Loss contingencies
Number of wastewater treatment plants from which PFC-containing sludge and biosolids may allegedly be discharged by Metropolitan Council, low end of range | item	1
Environmental Matters - Other Environmental Litigation
Loss contingencies
Accrued loss contingency reserve	$ 35,000,000
Insurance receivables	$ 15,000,000
Number of former disposal sites with PFC present in soil and groundwater in Washington County, Minnesota | item	2
Environmental Matters - Other Environmental Litigation | Maximum
Loss contingencies
Number of years remediation payments expected to be paid for applicable sites	4 years

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Commitments and Contingencies (Details) £ in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2009 USD ($)	Jun. 30, 2003 GBP (£)	Dec. 31, 2015 USD ($) lease	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Primary Capital Leases
Capital lease obligation			$ 54
Minimum lease payments under capital leases
2016			11
2017			6
2018			4
2019			3
2020			3
After 2020			32
Total			59
Less: Amounts representing interest			5
Less: Current obligations under capital leases			8
Long-term obligations under capital leases			46	$ 59
Minimum lease payments under operating leases
2016			234
2017			191
2018			134
2019			86
2020			72
After 2020			226
Total			943
Warranties/Guarantees:
Accrued product warranty liabilities			28	30
Unconditional Purchase Obligations
Due in 2016			193
Due in 2017			160
Due in 2018			102
Due in 2019			54
Due in 2020			56
Due after 2020			31
Total unconditional purchase obligation commitment			596
Capital and Operating Leases:
Rental expense under operating leases			$ 316	332	$ 330
Number of primary capital leases | lease			3
Capital and operating leases with non-cancelable terms, low end of range			1 year
Building in United Kingdom
Primary Capital Leases
Capital lease term (in years)		22 years
Capital lease obligation		£ 33.5	$ 50
IT Investment
Primary Capital Leases
Capital lease term (in years)	7 years
Capital lease obligation	$ 50
City of Nevada, MO leaseback capital lease obligation
Primary Capital Leases
Capital lease obligation				$ 15

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Commitments and Contingencies - Commercial Litigation (Details) - Commercial Litigation - TransWeb Corporation $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) patent claim
Loss contingencies
Number of counts jury did not rule in favor of Transweb | claim	1
Number of 3M patents unenforceable due to inequitable conduct | patent	2
Potential loss due to judgment against 3M | $	$ 26

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Commitments and Contingencies - Product Liability (Details) - 12 months ended Dec. 31, 2015 € in Millions	EUR (€) case lawsuit item	USD ($)
Product Liability - Filters
Product Liability Litigation
Number of lawsuits filed | case	2
Number of customers who obtained an order in the French Courts against 3M Purification SAS | item	1
Number of other customers the Company has resolved claims with | item	2
Product Liability Litigation - EDF
Product Liability Litigation
Number of lawsuits filed | lawsuit	1
Amount of potential damages (minimum) EDF incurred as stated by court appointed expert witness | €	€ 100
Product Liability Litigation - EDF | Maximum
Product Liability Litigation
Estimated time commercial court may take to render decision	1 year
Product Liability Litigation - EDF | Minimum
Product Liability Litigation
Estimated time commercial court may take to render decision	6 years
Product liability - Bair Hugger
Product Liability Litigation
Number of lawsuits filed | lawsuit	122
Accrued loss contingency reserve | $		$ 0

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Stock-Based Compensation (Details)	12 Months Ended
	Dec. 31, 2015 individual shares	Dec. 31, 2014 shares	Dec. 31, 2013 shares	May. 31, 2012 shares
Share-based Compensation Arrangement by Share-based Payment Award Activity
Number of participants with outstanding options, restricted stock, or restricted stock units | individual	9,200
Retirement age eligibility for employees	55 years
Retirement eligibility for employees, minimum years of service required	5 years
Percent of stock-based compensation related to retiree-eligible population (as a percent)	35.00%
General Employees' Stock Purchase Plan (GESPP)
Share-based Compensation Arrangement by Share-based Payment Award Activity
Number of shares authorized	60,000,000
Number of shares available for grant under the 2008 Long Term Incentive Plan Program (including additional subsequent shareholder approvals)	28,104,335	29,112,004	30,185,960
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award Activity
Number of shares authorized				100,000,000
Awards other than options and Stock Appreciation Rights, number of shares counted for every one share awarded under plan limit with grant dates prior to May 11, 2010	3.38
Awards other than options and Stock Appreciation Rights, number of shares counted for every one share awarded under plan limit with grant dates on or after May 11, 2010 and prior to May 8, 2012	2.87
Awards other than options and Stock Appreciation Rights, number of shares counted for every one share awarded under plan limit with grant dates of May 8, 2012, or later	3.50
Number of shares available for grant under the 2008 Long Term Incentive Plan Program (including additional subsequent shareholder approvals)	20,328,681

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Stock-Based Compensation - Compensation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amounts recognized in the financial statements
Stock-based compensation programs expense	$ 276	$ 280	$ 240
Income tax benefits	(87)	(79)	(71)
Stock-based compensation expenses, net of tax	189	201	169
Cost of sales
Amounts recognized in the financial statements
Stock-based compensation programs expense	46	47	27
Selling, general and administrative expenses
Amounts recognized in the financial statements
Stock-based compensation programs expense	185	192	183
Research, development and related expenses
Amounts recognized in the financial statements
Stock-based compensation programs expense	$ 45	$ 41	$ 30

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Stock-Based Compensation - Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock Option Program
Allocated Share Based Compensation Expense	$ 276.0	$ 280.0	$ 240.0
Stock Options
Stock Option Program
Balance at the beginning of the period	39,235,557	43,938,778	56,565,030
Granted - Annual	5,529,544	5,736,183	6,220,810
Granted - Progressive (Reload)			140,447
Granted - Other			191
Exercised	(5,978,382)	(10,219,261)	(18,825,218)
Canceled	(234,274)	(220,143)	(162,482)
Balance at the end of the period	38,552,445	39,235,557	43,938,778
Options exercisable	27,262,062	27,502,208	32,038,228
Options exercisable, exercise price	$ 85.97	$ 81.42	$ 79.58
Weighted average exercise price - Beginning balance	90.38	83.84	80.33
Weighted average exercise price - Granted - Annual	165.91	126.77	101.55
Weighted average exercise price - Granted - Progressive (Reload)			109.83
Weighted average exercise price - Granted - Other			119.62
Weighted average exercise price - Exercised	83.74	82.37	79.25
Weighted average exercise price - Canceled	128.99	105.11	89.92
Weighted average exercise price - Ending balance	$ 102.01	$ 90.38	$ 83.84
Weighted average remaining contractual life for options outstanding	66 months
Weighted average remaining contractual life for options exercisable	52 months
Aggregate intrinsic value for options outstanding	$ 1,958.0
Aggregate intrinsic value for options exercisable	$ 1,763.0
Expiration of annual grants	10 years
Compensation expense yet to be recognized	$ 69.0
Expense recognition period	21 months
Total intrinsic value of stock options exercised	$ 465.0	$ 615.0	$ 562.0
Cash received from options exercised	501.0	842.0	1,492.0
Tax benefit realized from exercise of stock options	$ 172.0	$ 226.0	$ 208.0
Stock Options | Maximum
Stock Option Program
Vesting period	3 years
Stock Options | Minimum
Stock Option Program
Vesting period	1 year
Stock Options | Annual Stock Option Program
Share- based compensation assumptions
Weighted average exercise price	$ 165.94	$ 126.72	$ 101.49
Risk-free interest rate (as a percent)	1.50%	1.90%	1.20%
Dividend yield (as a percent)	2.50%	2.60%	2.70%
Expected volatility (as a percent)	20.10%	20.80%	20.00%
Expected life	76 months	75 months	75 months
Black-Scholes fair value	$ 23.98	$ 19.63	$ 13.46
Stock Options | Progressive (Reload)
Share- based compensation assumptions
Weighted average exercise price			$ 109.84
Risk-free interest rate (as a percent)			0.20%
Dividend yield (as a percent)			2.70%
Expected volatility (as a percent)			16.30%
Expected life			12 months
Black-Scholes fair value			$ 6.42
General Employees' Stock Purchase Plan (GESPP)
Stock Option Program
Granted - Annual	1,007,669	1,073,956	1,259,247
Exercised	(1,007,669)	(1,073,956)	(1,259,247)
Weighted average exercise price - Granted - Annual	$ 133.52	$ 118.73	$ 93.46
Weighted average exercise price - Exercised	$ 133.52	$ 118.73	$ 93.46
Allocated Share Based Compensation Expense	$ 24.0	$ 22.0	$ 21.0
Share- based compensation assumptions
Black-Scholes fair value	$ 23.56	$ 20.95	$ 16.49
Option price, percentage of market value at date of grant	85.00%
Option price, discount from market value at date of grant	15.00%

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Stock-Based Compensation - RSU, RS, Performance Shares (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock Units and Restricted Stock
Unit and Shares Activity:
Number of Awards - Nonvested - Beginning balance	2,817,786	3,105,361	3,261,562
Number of Awards - Granted - Annual	671,204	798,615	946,774
Number of Awards - Granted - Other	26,886	78,252	44,401
Number of Awards - Vested	(1,010,612)	(1,100,675)	(1,100,095)
Number of Awards - Forfeited	(64,176)	(63,767)	(47,281)
Number of Awards - Nonvested - Ending balance	2,441,088	2,817,786	3,105,361
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Weighted Average Grant Date Fair Value - Nonvested - Beginning balance	$ 104.41	$ 92.31	$ 85.17
Weighted Average Grant Date Fair Value - Granted - Annual	165.86	126.79	101.57
Weighted Average Grant Date Fair Value - Granted - Other	156.94	152.74	111.19
Weighted Average Grant Date Fair Value - Vested	89.99	90.37	79.93
Weighted Average Grant Date Fair Value - Forfeited	118.99	97.23	90.82
Weighted Average Grant Date Fair Value - Nonvested - Ending balance	$ 127.47	$ 104.41	$ 92.31
Compensation expense yet to be recognized	$ 84,000,000
Expense recognition period	24 months
Fair value that vested	$ 166,000,000	$ 145,000,000	$ 114,000,000
Tax benefit realized from vesting	$ 62,000,000	$ 54,000,000	$ 43,000,000
Vesting or performance period	3 years
Value of dividend equivalents for restricted stock units that are forfeited	$ 0
Impact on basic earnings per share due to restricted stock units dividends	$ 0
Performance Shares
Unit and Shares Activity:
Number of Awards - Nonvested - Beginning balance	1,099,752	895,635	1,089,084
Number of Awards - Granted - Annual	227,798	305,225	353,734
Number of Awards - Vested	(323,938)	(277,358)	(507,083)
Number of Awards - Performance Change	(106,760)	212,461	(6,949)
Number of Awards - Forfeited	(25,660)	(36,212)	(33,151)
Number of Awards - Nonvested - Ending balance	871,192	1,099,752	895,635
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Weighted Average Grant Date Fair Value - Nonvested - Beginning balance	$ 102.65	$ 88.12	$ 79.27
Weighted Average Grant Date Fair Value - Granted - Annual	158.88	124.89	96.87
Weighted Average Grant Date Fair Value - Vested	83.08	84.74	75.16
Weighted Average Grant Date Fair Value - Performance Change	127.70	109.74	77.01
Weighted Average Grant Date Fair Value - Forfeited	125.33	109.44	91.34
Weighted Average Grant Date Fair Value - Nonvested - Ending balance	$ 120.89	$ 102.65	$ 88.12
Compensation expense yet to be recognized	$ 17,000,000
Expense recognition period	10 months
Fair value that vested	$ 54,000,000	$ 35,000,000	$ 52,000,000
Tax benefit realized from vesting	$ 15,000,000	$ 11,000,000	$ 16,000,000
Vesting or performance period	3 years
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Expense recognition period	3 years
Number of shares to be delivered based on percent of each performance share granted upon satisfaction of performance conditions	200.00%
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Expense recognition period	1 year
Number of shares to be delivered based on percent of each performance share granted upon satisfaction of performance conditions	0.00%

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Business Segments (Details)	12 Months Ended
	Dec. 31, 2015 segment
Business Segments
Number of business segments	5

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Business Segments - Segment information (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
Business Segment Information
Net sales	$ 7,298	$ 7,712	$ 7,686	$ 7,578	$ 7,719	$ 8,137	$ 8,134	$ 7,831	$ 30,274	$ 31,821	$ 30,871
Operating Income									6,946	7,135	6,666
Assets	32,718				31,209				32,718	31,209	33,304
Depreciation and amortization									1,435	1,408	1,371
Capital expenditures									1,461	1,493	1,665
Business Segments. | Industrial
Business Segment Information
Net sales									10,328	10,990	10,657
Operating Income									2,263	2,389	2,307
Assets	9,203				8,508				9,203	8,508	8,833
Depreciation and amortization									374	383	373
Capital expenditures									317	395	511
Business Segments. | Safety and Graphics
Business Segment Information
Net sales									5,515	5,732	5,584
Operating Income									1,305	1,296	1,227
Assets	7,564				4,939				7,564	4,939	5,122
Depreciation and amortization									245	234	255
Capital expenditures									199	221	207
Business Segments. | Health Care
Business Segment Information
Net sales									5,420	5,572	5,334
Operating Income									1,724	1,724	1,672
Assets	4,403				4,344				4,403	4,344	4,329
Depreciation and amortization									179	181	171
Capital expenditures									168	169	120
Business Segments. | Electronics and Energy
Business Segment Information
Net sales									5,220	5,604	5,393
Operating Income									1,102	1,115	954
Assets	4,815				5,116				4,815	5,116	5,336
Depreciation and amortization									291	271	260
Capital expenditures									211	232	261
Business Segments. | Consumer
Business Segment Information
Net sales									4,422	4,523	4,435
Operating Income									1,046	995	945
Assets	2,393				2,434				2,393	2,434	2,516
Depreciation and amortization									108	108	106
Capital expenditures									124	111	128
Corporate and Unallocated
Business Segment Information
Net sales									1	4	8
Operating Income									(355)	(251)	(321)
Assets	$ 4,340				$ 5,868				4,340	5,868	7,168
Depreciation and amortization									238	231	206
Capital expenditures									442	365	438
Elimination of Dual Credit
Business Segment Information
Net sales									(632)	(604)	(540)
Operating Income									$ (139)	$ (133)	$ (118)

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Geographic Areas (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
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales	$ 7,298	$ 7,712	$ 7,686	$ 7,578	$ 7,719	$ 8,137	$ 8,134	$ 7,831	$ 30,274	$ 31,821	$ 30,871
Operating Income (Loss)									6,946	7,135	6,666
Property, Plant and Equipment - net	8,515				8,489				8,515	8,489
China/Hong Kong
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									2,945
Property, Plant and Equipment - net	584								$ 584
Percent of consolidated worldwide sales									10.00%
Geographic Area | United States
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									$ 12,049	11,714	11,151
Operating Income (Loss)									2,647	2,540	2,210
Property, Plant and Equipment - net	4,838				4,619				4,838	4,619
Geographic Area | Asia Pacific
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									9,041	9,418	9,047
Operating Income (Loss)									2,580	2,487	2,386
Property, Plant and Equipment - net	1,647				1,798				1,647	1,798
Geographic Area | Europe, Middle East and Africa
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									6,228	7,198	7,085
Operating Income (Loss)									1,017	1,234	1,168
Property, Plant and Equipment - net	1,531				1,502				1,531	1,502
Geographic Area | Latin America and Canada
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									2,982	3,504	3,611
Operating Income (Loss)									706	867	908
Property, Plant and Equipment - net	$ 499				$ 570				499	570
Other Unallocated
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									(26)	(13)	(23)
Operating Income (Loss)									$ (4)	$ 7	$ (6)

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Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ 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 Data (Unaudited)
Net sales	$ 7,298	$ 7,712	$ 7,686	$ 7,578	$ 7,719	$ 8,137	$ 8,134	$ 7,831	$ 30,274	$ 31,821	$ 30,871
Cost of sales	3,827	3,877	3,858	3,821	4,027	4,205	4,184	4,031	15,383	16,447	16,106
Net income including noncontrolling interest	1,039	1,298	1,303	1,201	1,179	1,311	1,283	1,225	4,841	4,998	4,721
Net income attributable to 3M	$ 1,038	$ 1,296	$ 1,300	$ 1,199	$ 1,179	$ 1,303	$ 1,267	$ 1,207	$ 4,833	$ 4,956	$ 4,659
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$ 1.69	$ 2.09	$ 2.06	$ 1.88	$ 1.85	$ 2.02	$ 1.94	$ 1.83	$ 7.72	$ 7.63	$ 6.83
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	1.66	$ 2.05	$ 2.02	$ 1.85	$ 1.81	$ 1.98	$ 1.91	$ 1.79	$ 7.58	$ 7.49	$ 6.72
Impact on diluted earnings per share related to restructuring actions	$ 0.14