Rendering

Component: (Network and Table)
Network
1127 - Disclosure - Receivables - Schedule of Allowance for Doubtful Accounts (Detail)
(http://www.alcoa.com/taxonomy/role/DisclosureReceivablesScheduleOfAllowanceForDoubtfulAccounts)
TableSchedule of Accounts, Notes, Loans and Financing Receivable [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000004281 (http://www.sec.gov/CIK)
Accounts, Notes, Loans and Financing Receivable [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Receivable Type [Axis]Receivable Type [Axis]Receivable Type [Axis]
Customer Receivables [Member]Other Receivables [Member]Customer Receivables [Member]Other Receivables [Member]Customer Receivables [Member]Other Receivables [Member]
Balance at beginning of year
8,000,000  
34,000,000  
6,000,000  
24,000,000  
8,000,000  
28,000,000  
Provision for doubtful accounts
7,000,000  
6,000,000  
4,000,000  
8,000,000  
4,000,000  
8,000,000  
Write off of uncollectible accounts
(3,000,000) 
(1,000,000) 
(2,000,000) 
2,000,000  
(3,000,000) 
(4,000,000) 
Recoveries of prior write-offs
(1,000,000) 
1,000,000  
 
(1,000,000) 
(2,000,000) 
(7,000,000) 
Other
2,000,000  
(8,000,000) 
 
1,000,000  
(1,000,000) 
(1,000,000) 
Balance at end of year
13,000,000  
 
32,000,000  
 
8,000,000  
 
34,000,000  
 
6,000,000  
 
24,000,000