Rendering

Component: (Network and Table)
Network
1073 - Disclosure - Inventories - Schedule of Inventory Components (Detail)
(http://www.alcoa.com/taxonomy/role/DisclosureInventoriesScheduleOfInventoryComponents)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001675149 (http://www.sec.gov/CIK)
Inventory Disclosure [Abstract]Period [Axis]
2016-12-31
2015-12-31
Inventory Disclosure [Abstract]
 
 
Finished goods
226,000,000  
168,000,000  
Work-in-process
220,000,000  
206,000,000  
Bauxite and alumina
429,000,000  
445,000,000  
Purchased raw materials
363,000,000  
385,000,000  
Operating supplies
137,000,000  
140,000,000  
LIFO reserve
(215,000,000) 
(172,000,000) 
Inventories
1,160,000,000  
 
1,172,000,000