XML 8 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information
 12 Months Ended
Dec. 31, 2017
shares
Document Information [Line Items]  
Document Type 20-F/A
Amendment Flag false
Document Period End Date Dec. 31, 2017
Document Fiscal Year Focus 2017
Document Fiscal Period Focus FY
Trading Symbol RIO
Entity Registrant Name Rio Tinto plc
Entity Central Index Key 0000863064
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 Common Stock, Shares Outstanding 1,351,608,558
Rio Tinto Limited [member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 412,414,348