v3.8.0.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2018
Apr. 30, 2018
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  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2018  
Class A Ordinary Shares [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   93,965,582
Class B Ordinary Shares [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   28,729,280