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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Nov. 14, 2014
Goodwill [Line Items]        
Goodwill gross, beginning balance $ 5,302 $ 5,115    
Accumulated impairment losses, beginning balance (53) (28)    
Goodwill, beginning balance 5,249 5,087    
Acquisitions and Divestitures 47 260    
Impairment   (25)    
Translation and other (148) (73)    
Goodwill gross, ending balance 5,201 5,302    
Accumulated impairment losses, ending balance (53) (53)    
Goodwill, ending balance 5,249 5,087 $ 5,148  
Global Rolled Products [Member]        
Goodwill [Line Items]        
Goodwill gross, beginning balance 201 210    
Goodwill, beginning balance 201 210    
Acquisitions and Divestitures   (1)    
Translation and other (20) (8)    
Goodwill gross, ending balance 181 201    
Goodwill, ending balance 201 210 181  
Engineered Products and Solutions [Member]        
Goodwill [Line Items]        
Goodwill gross, beginning balance 4,660 4,458    
Goodwill, beginning balance 4,660 4,458    
Acquisitions and Divestitures 47 261    
Translation and other (128) (59)    
Goodwill gross, ending balance 4,579 4,660    
Goodwill, ending balance 4,660 4,458 4,579 $ 1,801
Transportation and Construction Solutions [Member]        
Goodwill [Line Items]        
Goodwill gross, beginning balance 111 114    
Accumulated impairment losses, beginning balance (53) (28)    
Goodwill, beginning balance 58 86    
Impairment   (25)    
Translation and other (1) (3)    
Goodwill gross, ending balance 110 111    
Accumulated impairment losses, ending balance (53) (53)    
Goodwill, ending balance 58 86 57  
Corporate [Member]        
Goodwill [Line Items]        
Goodwill gross, beginning balance 330 333    
Goodwill, beginning balance 330 333    
Translation and other 1 (3)    
Goodwill gross, ending balance 331 330    
Goodwill, ending balance $ 330 $ 333 $ 331