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Document and Entity Information
 12 Months Ended
Jun. 30, 2019
shares
Document information [line items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Jun. 30, 2019
Document Fiscal Year Focus 2019
Document Fiscal Period Focus FY
Entity Registrant Name BHP Group Ltd
Entity Central Index Key 0000811809
Current Fiscal Year End Date --06-30
Entity Well-known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Filer Category Large Accelerated Filer
Entity Shell Company false
Entity Emerging Growth Company false
Entity Address, Address Line One 171 COLLINS STREET
Entity Address, City or Town MELBOURNE
Entity Address, Country AU
BHP Group Limited [member]  
Document information [line items]  
Entity Common Stock, Shares Outstanding 2,945,851,394
BHP Group Plc [member]  
Document information [line items]  
Entity Common Stock, Shares Outstanding 2,112,071,796