XML 200 R112.htm IDEA: XBRL DOCUMENT v3.21.2
Property, Plant and Equipment - Summary of Property, Plant and Equipment (Parenthetical) (Detail) - USD ($)
$ in Millions
Jun. 30, 2021
Nov. 06, 2020
Jun. 30, 2020
Jun. 30, 2019
Disclosure of detailed information about property, plant and equipment [line items]        
Acquisition Of additional proportion Of ownership interest In joint operation   28.00%    
Right-of-use assets $ 3,350   $ 3,047 $ 492
Shenzi [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Acquisition Of additional proportion Of ownership interest In joint operation 28.00%