Split (1)

train · 13.6M rows

ticker string	cik string	sic string	sic_description string	fiscal_year int64	chunk_id int64	is_table bool	text string	token_count int64	is_boilerplate bool
AA	0001675149	3334	Primary Production of Aluminum	2,016	200	false	Iceland under a 40-year power contract. As a result of the Separation Transaction, Landsvirkjun 20 --- Table of Contents agreed to assign the power contract to Alcoa, conditioned upon Alcoa Corporation and Arconic both continuing to guarantee the obligations under the power contract. Alcoa Corporation may request Lands...	435	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	201	false	the full conversion of the San Ciprián, Spain alumina refinery from fuel oil to natural gas, in October 2013, Alumina Española SA (AE) and Gas Natural Transporte SDG SL (GN) signed a take or pay gas pipeline utilization agreement. Pursuant to that agreement, the ultimate shareholders of AE, ParentCo and Alumina Limited...	476	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	202	false	each shareholder is responsible for its respective proportionate share (i.e., 60/40). Such commitment came into force six months after the gas pipeline was put into operation by GN. The gas pipeline was completed in January 2015 and the refinery has switched to natural gas consumption for 100% of its needs. As a result...	444	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	203	false	Natural gas is supplied to the San Ciprián, Spain alumina refinery pursuant to two supply contracts with Endesa, expiring in June and December 2017, and one supply contract with Gas Natural Fenosa (GNF), expiring in December 2017. Pursuant to the Endesa agreements, Aluminio Español SL and Alumina Limited guarantee the ...	377	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	204	false	responsible for its respective proportionate share (i.e., 60/40). Pursuant to the GNF agreement, Alcoa Inespal SL and Alumina Limited guarantee the payment of AE’s obligations, each shareholder being responsible for its respective proportionate share (i.e., 60/40). North America In order to supply its refinery and smel...	483	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	205	false	areas and independent gas marketers. Pipeline transportation may be procured directly or via the local distribution companies. Contract pricing for gas is typically based on a published industry index such as the New York Mercantile Exchange (“NYMEX”) price. The Company may choose to reduce its exposure to NYMEX pricin...	468	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	206	false	processes at the Kwinana, Pinjarra and Wagerup refineries. More than 90% of AofA’s gas requirements for the remainder of the decade are secured under long-term contracts. In 2015, AofA entered into a number of long-term gas supply agreements which secured a significant portion of AofA’s gas supplies to 2032. AofA is ac...	472	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	207	false	owned subsidiary of AofA) sold its 20% equity interest in the Dampier-to-Bunbury natural gas pipeline, which transports gas from the northwest gas fields to AofA’s alumina refineries and other users in the Southwest of Western Australia, to DUET Investment Holdings Limited. Rolled Products This segment represents Alcoa...	492	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	208	false	(beverage, food, and pet food). Seasonal increases in can sheet sales are generally experienced in the second and third quarters of the year. This segment also includes Alcoa Corporation’s investment in a rolling mill in Saudi Arabia through its Ma’aden joint venture; for additional information, see the Equity Investme...	481	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	209	false	The Warrick rolling mill supports our participation in several market segments, including beverage can sheet, food can sheet, lithographic sheet, aluminum bottle sheet, and industrial products. The term “RCS” or Rigid Container Sheet is commonly used for both beverage and food can sheet. This includes the material used	321	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	210	false	to produce the body of beverage containers (bodystock), the lid of beverage containers (endstock and tabstock), the material to produce food can body and lids (food stock) and the material to produce aluminum bottles (bottlestock) and bottle closures (closure sheet). The U.S. aluminum can business comprises approximate...	477	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	211	false	expected to be the sole domestic supplier of lithographic sheet, focusing on quality, reduced lead-times and delivery performance. In 2016, our Warrick facility produced and sold 272 kMT of RCS and industrial products, of which over 90% was sold to customers in North America. The majority of its sales were coated RCS p...	380	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	212	false	the Separation Transaction, both Warrick and Ma’aden supply body stock material, temporarily supplemented by Arconic’s Tennessee Operations under a transition supply agreement. Can sheet demand is a function of consumer demand for beverages in aluminum packaging. Aluminum cans have a number of functional advantages for...	371	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	213	false	carbonation retention, and logistics/distribution efficiency. Demand is mostly affected by overall demand for carbonated soft drinks (“CSDs”) and beer. CSDs and beer compose approximately 60% and 40%, respectively, of overall aluminum can demand. In recent years, CSDs sales have been declining 1% to 4% year over year. ...	484	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	214	false	reached 94.3 billion cans, a growth of 1.2% over 2015. Alcoholic can shipments reached 37.9 billion cans, growing 2.6% year over year, while non-alcoholic can shipments were 56.4 billion, flat year over year. Sources and Availability of Raw Materials Generally, materials are purchased from third-party suppliers under c...	495	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	215	true	For each metric ton of alumina produced, Alcoa Corporation consumes the following amounts of the identified raw material inputs (approximate range across relevant facilities): \| \| \| \| \| \| \| --- \| --- \| --- \| --- \| --- \| \| \| \| \| \| \| \| Raw Material \| \| Units \| \| Consumption per MT of Alumina \| \| Bauxite \| \| ...	466	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	216	true	\| Fuel oil and natural gas \| \| GJ \| \| 6.3 – 11.9 \| \| Lime (CaO) \| \| kg \| \| 6 – 70 \| For each metric ton of aluminum produced, Alcoa Corporation consumes the following amounts of the identified raw material inputs (approximate range across relevant facilities): \| \| \| \| \| \| \| --- \| --- \| --- \| --- \| --- \| \| \| ...	490	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	217	false	\| Calcined petroleum coke \| \| mt \| \| 0.37 ± 0.02 \| \| Cathode blocks \| \| mt \| \| 0.006 ± 0.002 \| \| Electricity \| \| kWh \| \| 12900 – 17000 \| \| Liquid pitch \| \| mt \| \| 0.10 ± 0.03 \| \| Natural gas \| \| mcf \| \| 3.5 ± 1.5 \| 22 --- Table of Contents Certain aluminum we produce includes alloying materials. Because of th...	357	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	218	false	elements that can be used to produce our various alloys, providing a range of such elements would not be meaningful. With the exception of a very small number of internally used products, Alcoa produces its alloys in adherence to an Aluminum Association standard. The Aluminum Association, of which Alcoa Corporation is ...	489	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	219	false	have other constituents as well, but of lesser amounts. Competition Alcoa is subject to highly competitive conditions in all aspects of the aluminum supply chain in which it competes. Competitors include a variety of both U.S. and non-U.S. companies in all major markets.	276	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	220	false	Brand name recognition and loyalty also play a role. In addition Alcoa’s competitive position depends, in part, on the Company’s access to an economical power supply to sustain its operations in various countries. Bauxite: The third-party market for metallurgical grade bauxite is relatively new and growing quickly as g...	491	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	221	false	Alcoa has historically mined bauxite for internal consumption in our alumina refineries, we are focused on building our third-party bauxite business to meet growing demand. We sold 6.4 million tons of bauxite to a diverse third-party customer base in 2016. Competitors in the third-party bauxite market include Rio Tinto...	376	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	222	true	Malaysia, India and other countries. We compete largely based on bauxite quality, price and proximity to end markets. Alcoa Corporation has a strong competitive position in this market for the following reasons: \| \| \| \| \| \| --- \| --- \| --- \| --- \| \| \| • \| \| Low Cost Production: Alcoa is the world’s largest bauxit...	502	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	223	true	\| \| • \| \| Reliable, Long-Term Bauxite Resources: Alcoa’s strategic bauxite mine locations include Australia and Brazil as well as Guinea, which is home to the world’s largest reserves of high-quality metallurgical grade bauxite. Alcoa Corporation has a long history of stable operations in these countries and has acce...	485	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	224	false	\| \| • \| \| Access to Markets: Alcoa’s Australian bauxite mines are located in close proximity to the largest third-party customer base in China and our facilities are also accessible to a significant and growing alumina refining base in the Middle East. \| Contracts for bauxite	279	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	225	false	have generally been short-term contracts (two years or less in duration) with spot pricing and adjustments for quality and logistics, although we are currently pursuing long-term contracts with potential customers. The primary customer base for third-party bauxite is located in Asia—particularly China. Alumina: The alu...	473	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	226	false	from a number of companies in all of the regions in which we operate, including Aluminum Corporation of China Limited, China Hongqiao Group Limited, Hindalco Industries Ltd., Hangzhou Jinjiang Group, National Aluminium Company Limited (“NALCO”), Noranda Aluminum Holding Corporation, Norsk Hydro ASA, Rio Tinto Inc., Sou...	472	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	227	false	significant growth in alumina refining in China and India. The majority of our product is sold in the form of smelter grade alumina, with 5% to 10% of total global alumina production being produced for non-metallurgical applications. 23 --- Table of Contents Key factors influencing competition in the alumina market inc...	369	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	228	true	bauxite supply, quality and proximity to customers and end markets. While we face competition from many industry players, we have several competitive advantages: \| \| \| \| \| \| --- \| --- \| --- \| --- \|	202	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	229	true	\| \| • \| \| Proximity to Bauxite: Our refineries are strategically located next to low cost, upstream bauxite mines, and our alumina refineries are tuned to maximize efficiency with the exact bauxite qualities from these internal mines. In addition to refining efficiencies, vertical integration affords a stable and con...	425	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	230	true	\| \| • \| \| Low Cost Production: As the world’s largest alumina producer, Alcoa has competitive, efficient assets across its refining portfolio, with a 2016 average cost position in the first quartile of global alumina production. Contributing to this cost position is our experienced workforce and sophistication in ref...	403	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	231	false	\| \| • \| \| Access to Markets: Alcoa is a global supplier of alumina with refining operations in the key markets of North America (curtailed), South America, Europe, the Middle East, and Australia, enabling us to meet customer demand in the Atlantic and Pacific basins, including China. \| Contracts for smelter grade alu...	492	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	232	false	frequent pricing adjustment. A significant development occurred in the pricing structure for alumina beginning in 2010. Traditionally, most alumina outside of China had been sold to third party smelters with the price calculated as a percentage of the LME aluminum price. In 2010, a number of key commodity information s...	386	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	233	false	pricing assessments or indices. Since that time, Alcoa has been systematically moving its third-party alumina sales contracts away from LME aluminum-based pricing to published alumina spot or index pricing, thus de-linking the price for alumina from the aluminum price to better reflect alumina’s distinct fundamentals. ...	489	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	234	false	37% in 2012). We expect a similar percentage of our third-party alumina shipments to be based on API or spot pricing in 2017 as in 2016. Alcoa’s largest customer for smelter grade alumina is its own aluminum smelters, which in 2016 accounted for approximately 34% of its total alumina sales. Remaining sales are made to ...	459	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	235	false	The market for primary aluminum is global, and demand for aluminum varies widely from region to region. We compete with commodity traders and aluminum producers such as Aluminum Corporation of China Limited, China Hongqiao Group Limited, East Hope Group Co. Ltd., Emirates Global Aluminum, Norsk Hydro, Rio Tinto Alcan I...	376	true
AA	0001675149	3334	Primary Production of Aluminum	2,016	236	false	Investment Co. (“SPIC”), United Company RUSAL Plc as well as with alternative materials such as steel, titanium, copper, carbon fiber, composites, plastic and glass, each of which may be substituted for aluminum in certain applications. The aluminum industry itself is highly competitive; some of the most critical compe...	372	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	237	false	production costs (including source and cost of energy), price, proximity to customers and end markets, timeliness of delivery, customer service (including technical support), and product innovation and breadth of offerings. Where aluminum products compete with other materials, the diverse characteristics of aluminum ar...	398	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	238	false	In addition, in some end-use markets, competition is also affected by customer requirements that suppliers complete a qualification process to supply their plants. This process can be rigorous and may take many months to complete. However, the ability to obtain and maintain these qualifications can represent a competit...	473	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	239	true	and the lack of localized customer support. There is a growing trade in higher value-added products, with recent trade patterns seeing more flow toward the deficit regions. However, suppliers in emerging markets may export lower value-added or even commodity aluminum products to larger, more mature markets, as we have ...	496	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	240	true	\| \| • \| \| Value-Added Product Portfolio: Alcoa Corporation has 15 casthouses supplying global customers with a diverse product portfolio, both in terms of shapes and alloys. We have steadily grown our cast products business by offering differentiated, value-added aluminum products that are cast into specific shapes t...	481	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	241	false	\| \| • \| \| Low Cost Production: As the world’s sixth largest aluminum producer in 2016, Alcoa leverages significant economies of scale in order to continuously reduce costs. As a result, Alcoa operates competitive, efficient assets across its aluminum smelting and casting portfolios, with its 2016 average smelting cos...	383	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	242	true	This cost position is supported by long-term energy arrangements at many locations; Alcoa Corporation has secured approximately 68% of its smelter power needs through 2022. \| \| \| \| \| \|	189	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	243	true	\| --- \| --- \| --- \| --- \| \| \| • \| \| Access to Markets: Alcoa is a global supplier of aluminum with smelting and casting operations in the key markets of North America, Europe, the Middle East, and Australia, enabling us to access a broad customer base with competitive logistics costs. \| \| \| \| \| \| \| --- \| --- \| --...	330	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	244	false	\| \| • \| \| Sustainability: As of December 31, 2016, approximately 70% of our aluminum smelting portfolio runs on clean hydroelectric power, lessening our demand for fossil fuels and potentially mitigating the risk to the Company from future carbon tax legislation. \| Contracts	278	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	245	false	for primary aluminum vary widely in duration, from multi-year supply contracts to monthly or weekly spot purchases. Pricing for primary aluminum products is typically comprised of three components: (i) the published LME aluminum price for commodity grade P1020 aluminum, (ii) the published regional premium applicable to...	469	true
AA	0001675149	3334	Primary Production of Aluminum	2,016	246	false	and aluminum, electricity markets are regional. They are limited in size by physical and regulatory constraints, including the physical inability to transport electricity efficiently over long distances, the design of the electric grid, including interconnections, and by the regulatory structure imposed by various fede...	476	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	247	false	Brazilian wholesale energy markets. Our competitors include integrated electric utilities that may be owned by governments (either fully or partially), cooperatives or investors, independent power producers and energy brokers and traders. Competition factors in open power markets include fuel supply, production costs, ...	375	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	248	false	environmental attributes (e.g., green power and renewable energy credits). As electricity is difficult and cost prohibitive to store, there are no electricity inventories to cushion the impact of supply and demand factors and the resultant pricing in electricity markets may be volatile. Demand for power varies greatly ...	474	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	249	false	planned generator outages, droughts, high precipitation levels and fuel pricing (coal and/or natural gas). Electricity contracts may be very short term (real-time), short term (day ahead) or years in duration, and contracts can be executed for immediate delivery or years in advance. Pricing may be fixed, indexed to an ...	495	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	250	true	unit delivered basis (e.g., dollars per megawatt hour) or the components may be separated and include a demand or capacity charge, an energy charge, an ancillary services charge and a transmission charge to make the delivered energy conform to customer requirements. Alcoa’s energy assets enjoy several competitive advan...	407	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	251	true	\| \| • \| \| Reliability: In the United States, we have operated our thermal energy assets for over 50 years and our hydro energy assets for over 95 years with a high degree of reliability and expect to continue this level of performance. In Brazil, our ownership provides for assured energy from hydroelectric operations...	385	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	252	true	\| \| • \| \| Access and proximity to markets: Our U.S. assets are positioned to take advantage of sales into some of the more liquid power markets, including sales of both energy and capacity. \| \| \| \| \| \| \| --- \| --- \| --- \| --- \| \| \| • \| \| Sustainable (green) energy sources: A majority of our generating assets us...	500	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	253	false	Rolled Products participates in various market segments, including beverage can sheet, food can sheet, lithographic sheet, aluminum bottle sheet, and industrial products. The term “RCS” or Rigid Container Sheet is commonly used for both beverage and food can sheet. The Warrick rolling mill competes with other North Ame...	353	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	254	false	namely Novelis Corp, Tri-Arrows Aluminum, and Constellium NV. The Warrick rolling mill is expected to be the sole domestic supplier of lithographic sheet, focusing on quality, reduced lead-times and delivery performance. Buyers of RCS products in North America are large and concentrated and have significant market powe...	373	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	255	false	can sheet sold in the beverage industry (three can makers and the two beverage companies). In 2016, we estimate the North American (Canada/U.S./Mexico) aluminum can sheet buyers and their share of the industry are: AB-Inbev (>39%), Coke (>21%), Ball (>18%), Crown (>15%), Ardagh (>5%) and others (2%). Buyers traditional...	474	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	256	false	approximately 60% of their manufacturing costs, there is a heavy focus on cost. In 2016, our Warrick facility produced and sold 272 kMT of RCS and industrial products, of which over 90% was sold to customers in North America. The majority of its sales were coated RCS products (food stock, beverage end and tab stock). F...	506	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	257	false	We also compete with competitive package types including PET bottles, glass bottles, steel tin plate and other materials. In the U.S., aluminum cans, PET bottles and glass bottles represent approximately 69%, 29% and 2%, respectively, of the CSDs segment. In the beer segment, aluminum cans, glass bottles, and aluminum ...	392	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	258	false	the business. In the food can segment, steel tin plate cans and aluminum food cans represent approximately 83% and 17%, respectively, with aluminum cans representing approximately 52% of the pet food segment. We compete on cost, quality, and service. Alcoa Corporation intends to continue to improve our cost position by...	361	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	259	false	our metal feedstock as well as continuing to focus on capacity utilization. We believe our team of technical and operational resources provides distinctive quality and customer service. Patents, Trade Secrets and Trademarks The Company believes that its domestic and international patent, trade secret and trademark asse...	495	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	260	false	them, are important to the Company as a whole and, to varying degrees, important to each business segment. Alcoa’s business as a whole is not, however, materially dependent on any single patent, trade secret or trademark. As a result of product development and technological advancement, the Company continues to pursue ...	427	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	261	false	portfolio consisted of approximately 600 granted patents and 285 pending patent applications. The Company also has a number of domestic and international registered trademarks that have significant recognition within the markets that are served, including the name “Alcoa” and the Alcoa symbol for aluminum products. Our...	450	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	262	false	As part of the Separation Transaction, two Arconic businesses, Alcoa Wheels and Spectrochemical Standards, have ongoing rights to use the Alcoa name. See “Certain Relationships and Related Party Transactions, and Director Independence—Agreements with Arconic—Intellectual Property License Agreements.” Research and Devel...	496	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	263	false	Corporation is subject to extensive federal, state and local environmental laws and regulations, including those relating to the release or discharge of materials into the air, water and soil, waste management, pollution prevention measures, the generation, storage, handling, use, transportation and disposal of hazardo...	496	true
AA	0001675149	3334	Primary Production of Aluminum	2,016	264	false	and cleanups at approximately 60 locations. These include owned or operating facilities and adjoining properties, previously owned or operating facilities and adjoining properties, and waste sites, including Superfund (Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”)) sites. Approved capi...	479	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	265	false	Additional information relating to environmental matters is included in Note R to the Consolidated Financial Statements under the caption “Contingencies and Commitments—Environmental Matters.” Employees Alcoa’s total worldwide employment at the end of 2016 was approximately 14,000 employees in 15 countries. Approximate...	501	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	266	false	In the U.S., approximately 1,950 employees are represented by various labor unions. The largest collective bargaining agreement is the master collective bargaining agreement with the United Steelworkers (“USW”). The USW master agreement covers approximately 1,400 employees at six U.S. locations. There are three other c...	330	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	267	false	bargaining agreements in the U.S. with varying expiration dates. On a regional basis, collective bargaining agreements with varying expiration dates cover approximately 2,100 employees in Europe, 2,000 employees in Canada, 850 employees in Central and South America, and 2,750 employees in Australia. 27 --- Table of Con...	507	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	268	false	Roy C. Harvey, 43, is the Chief Executive Officer of Alcoa Corporation. Mr. Harvey served as Executive Vice President of ParentCo and President of ParentCo’s Global Primary Products from October 2015 to November 2016. From June 2014 to October 2015, he was Executive Vice President, Human Resources and Environment, Heal...	432	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	269	false	Primary Products at ParentCo from July 2013 to June 2014, and was Chief Financial Officer for Global Primary Products from December 2011 to July 2013. In addition to these roles, Mr. Harvey served as Director of Investor Relations at ParentCo from September 2010 to November 2011 and was Director of Corporate Treasury f...	466	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	270	false	William F. Oplinger, 50, is Executive Vice President and Chief Financial Officer of Alcoa Corporation. Mr. Oplinger served as Executive Vice President and Chief Financial Officer of ParentCo from April 1, 2013 to November 2016. Mr. Oplinger joined ParentCo in 2000 and held key corporate positions in financial analysis ...	376	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	271	false	Mr. Oplinger also held key positions in the ParentCo’s Global Primary Products business, including as Controller, Operational Excellence Director, Chief Financial Officer, and Chief Operating Officer. Tómas M. Sigurðsson, 49, is Executive Vice President and Chief Operating Officer of Alcoa Corporation. Mr. Sigurðsson s...	330	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	272	false	as Chief Operating Officer of ParentCo’s Global Primary Products business from 2014 to November 2016. Mr. Sigurðsson was President of ParentCo’s European Region and Global Primary Products Europe from 2012 to 2014. From 2004 to 2011, Mr. Sigurðsson was Managing Director of Alcoa Iceland. Leigh Ann Fisher, 50, is Execut...	353	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	273	false	Administrative Officer, overseeing Human Resources, Shared Services, Procurement and Information Technology of Alcoa Corporation. Ms. Fisher served as Chief Financial Officer of ParentCo’s Global Primary Products business from July 2013 to November 2016. Ms. Fisher was Group Controller for Global Primary Products at Pa...	456	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	274	false	Jeffrey D. Heeter, 51, is Executive Vice President, General Counsel and Secretary of Alcoa Corporation. Mr. Heeter served as Assistant General Counsel of ParentCo from 2014 to November 2016. Mr. Heeter was Group Counsel for Global Primary Products at ParentCo from 2010 to 2014. From 2008 to 2010, Mr. Heeter was General...	495	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	275	false	previously served as the Director, Global Shared Services Strategy and Solutions for Alcoa Corporation, with responsibility for the strategy, planning and implementation of transformation activities for Alcoa Corporation’s shared services organization beginning in November 2016. From January through October of 2016, pr...	474	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	276	false	of the Separation Transaction. From 2012 to 2015, she served as Vice President, Finance and Administration for a non-profit organization focused on community issues. Ms. Beerman first joined ParentCo in 2001, and was the director of ParentCo’s global procurement center of excellence from 2008 to 2012. Item 1A. Risk Fa...	454	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	277	false	factors discussed elsewhere in this report, the following risks and uncertainties could materially harm its business, financial condition or results of operations, including causing Alcoa’s actual results to differ materially from those 28 --- Table of Contents projected in any forward-looking statements. The following...	459	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	278	false	presently known to Alcoa or that Alcoa currently deems immaterial also may materially adversely affect us in future periods. Risks Related to Our Business The aluminum industry and aluminum end-use markets are highly cyclical and are influenced by a number of factors, including global economic conditions. The aluminum ...	413	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	279	false	in global economic conditions and aluminum end-use markets. The demand for aluminum is sensitive to, and quickly impacted by, demand for the finished goods manufactured by our customers in industries that are cyclical, such as the commercial construction and transportation, automotive, and aerospace industries, which m...	486	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	280	false	correlated to economic growth. For example, the European sovereign debt crisis that began in late 2009 had an adverse effect on European demand for aluminum and aluminum products. The Chinese market is a significant source of global demand for, and supply of, commodities, including aluminum. A sustained slowdown in Chi...	492	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	281	false	emerging economies, such as India, Brazil, and several South East Asian countries, could have an adverse effect on the global supply and demand for aluminum and aluminum prices. While we believe the long-term prospects for aluminum and aluminum products are positive, we are unable to predict the future course of indust...	379	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	282	false	effects of government intervention. Negative economic conditions, such as a major economic downturn, a prolonged recovery period, a downturn in the commodity sector, or disruptions in the financial markets, could have a material adverse effect on our business, financial condition or results of operations. While the alu...	386	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	283	false	and bauxite markets, those markets also have industry-specific risks including, but not limited to, global freight markets, energy markets, and regional supply-demand imbalances. The aluminum industry specific risks can have a material effect on profitability for the alumina and bauxite markets. We could be materially ...	503	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	284	false	(i) the underlying base metal component, which is typically based on quoted prices from the LME; (ii) the regional premium, which comprises the incremental price over the base LME component that is associated with the physical delivery of metal to a particular region (e.g., the Midwest premium for metal sold in the Uni...	481	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	285	false	rod, etc.) or alloy. Each of the above three components has its own drivers of variability. The LME price is typically driven by macroeconomic factors, global supply and demand of aluminum (including expectations for growth and contraction and the level of global inventories), and trading activity of financial investor...	483	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	286	false	pricing. Speculative trading in aluminum and the influence of hedge funds and other financial institutions participating in commodity markets have also increased in recent years, contributing to higher levels of price volatility. In 2016, the cash LME price of aluminum reached a high of $1,777 per metric ton and a low ...	469	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	287	false	aluminum. Declines in the LME price have had a negative impact on our results of operations. Additionally, our results could be adversely affected by decreases in regional premiums that participants in the physical metal market pay for immediate delivery of aluminum. Regional premiums tend to vary based on the supply o...	357	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	288	false	demand for metal in a particular region and associated transportation costs. LME warehousing rules and surpluses have caused regional premiums to decrease, which would have a negative impact on our results of operations. Product premiums generally are a function of supply and demand for a given primary aluminum shape a...	433	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	289	false	pricing environment. A sustained weak LME aluminum pricing environment, deterioration in LME aluminum prices, or a decrease in regional premiums or product premiums could have a material adverse effect on our business, financial condition, and results of operations or cash flow. Most of our alumina contracts contain tw...	376	true
AA	0001675149	3334	Primary Production of Aluminum	2,016	290	false	negotiated adjustment basis that takes into account various factors, including freight, quality, customer location and market conditions. Because the API component can exhibit significant volatility due to market exposure, revenue associated with our alumina operations are exposed to market pricing. Our bauxite-related...	494	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	291	false	revenue associated with our bauxite operations may become further exposed to market pricing. Changes to LME warehousing rules could cause aluminum prices to decrease. Since 2013, the LME has been engaged in a program aimed at reforming the rules under which registered warehouses in its global network operate. The initi...	497	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	292	false	warehouse charges. These rule changes, and any subsequent changes the exchange chooses to make, could impact the supply/demand balance in the primary aluminum physical market and may impact regional delivery premiums and LME aluminum prices. Decreases in regional delivery premiums and/or decreases in LME aluminum price...	437	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	293	false	We may not be able to realize the expected benefits from our strategy of creating a lower cost, competitive commodity business by optimizing our portfolio. We are continuing to execute a strategy of creating a lower cost, competitive integrated aluminum production business by	283	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	294	false	optimizing our portfolio. We are creating a competitive standalone business by taking decisive actions to lower the cost base of our upstream operations, including closing, selling or curtailing high-cost global smelting capacity, optimizing alumina refining capacity, and pursuing the sale of our interest in certain ot...	379	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	295	false	execute, acquisitions and divestitures and take other actions to grow or streamline our portfolio. There is no assurance that anticipated benefits of our strategic actions will be realized. With respect to portfolio optimization actions such as divestitures, curtailments and closures, we may face barriers to exit from ...	479	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	296	false	divested entities if a buyer fails to honor all commitments. Our business operations are capital intensive, and curtailment or closure of operations or facilities may include significant charges, including employee Separation Transaction costs, asset impairment charges and other measures. There can be no assurance that...	488	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	297	false	Market-driven balancing of global aluminum supply and demand may be disrupted by non-market forces or other impediments to production closures. In response to market-driven factors relating to the global supply and demand of aluminum and alumina, we have curtailed or closed portions of our aluminum and alumina producti...	510	true
AA	0001675149	3334	Primary Production of Aluminum	2,016	298	false	contracts to buy power or raw materials. 30 --- Table of Contents The existence of non-market forces on global aluminum industry capacity, such as political pressures in certain countries to keep jobs or to maintain or further develop industry self-sufficiency, may prevent or delay the closure or curtailment of certain...	420	false
AA	0001675149	3334	Primary Production of Aluminum	2,016	299	false	Chinese excess capacity and increased exports from China of heavily subsidized aluminum products could materially disrupt world aluminum markets causing pricing deterioration. If industry overcapacity exists due to the disruption by such non-market forces on the market-driven balancing of the global supply and demand o...	451	false

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