v3.8.0.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2017
Jan. 31, 2018
Jun. 30, 2017
Document Information [Line Items]      
Entity Registrant Name Tronox Ltd    
Entity Central Index Key 0001530804    
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     $ 1,797,488,386
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2017    
Class A Ordinary Shares [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   92,660,776  
Class B Ordinary Shares [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   28,729,280