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Segment Production And Growth Assets - Summary of Segment Production and Growth Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of operating segments [line items]      
Total exploration and evaluation $ 668 $ 807  
Total oil and gas properties 40,791 39,919  
Total lease assets 1,230 1,264 $ 1,080
Additions to exploration and evaluation 246 240 [1]  
Additions to oil and gas properties 6,595 3,824 [1]  
Additions to lease assets 128 242 [1]  
Land and buildings [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 701 840  
Total lease assets 430 464 377
Additions to lease assets 8 4 [1]  
Transferred exploration and evaluation [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 777 481  
Plant and equipment [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 23,589 23,057  
Total lease assets 800 [2] 800 $ 703
Additions to lease assets 120 238 [1]  
Projects in development [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 15,724 15,541 [3]  
Exploration [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation 88 122 [1]  
Evaluation [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation 163 119 [1]  
Restoration [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation [4] (5) (1) [1]  
Additions to oil and gas properties [4] 967 (374) [1]  
Oil And Gas Properties [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties 5,317 3,904 [1]  
Capitalised borrowings costs [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties 311 [5] 294 [1],[6]  
Asia Pacific [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 568 529  
Americas [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 76 240  
Africa [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 24 38  
Australia [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 568 529  
Total oil and gas properties 25,352 25,155  
Total lease assets 290 307  
Additions to exploration and evaluation 79 19 [1]  
Additions to oil and gas properties 4,094 2,021 [1]  
Additions to lease assets 6 143 [1]  
Australia [member] | Land and buildings [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 669 802  
Total lease assets 96 93  
Additions to lease assets [1]   4  
Australia [member] | Transferred exploration and evaluation [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 360 481  
Australia [member] | Plant and equipment [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 16,498 18,249  
Total lease assets 194 [2] 214  
Additions to lease assets 6 139 [1]  
Australia [member] | Projects in development [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 7,825 5,623 [3]  
Australia [member] | Exploration [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation 29 1 [1]  
Australia [member] | Evaluation [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation 55 19 [1]  
Australia [member] | Restoration [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation [4] (5) (1) [1]  
Additions to oil and gas properties [4] 779 (346) [1]  
Australia [member] | Oil And Gas Properties [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties 3,127 2,252 [1]  
Australia [member] | Capitalised borrowings costs [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties 188 [5] 115 [1],[6]  
Australia [member] | Asia Pacific [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 568 529  
International [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 100 278  
Total oil and gas properties 14,997 14,479  
Total lease assets 149 238  
Additions to exploration and evaluation 167 221 [1]  
Additions to oil and gas properties 2,311 1,711 [1]  
Additions to lease assets [1]   90  
International [member] | Land and buildings [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 32 37  
Total lease assets 89 107  
International [member] | Transferred exploration and evaluation [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 417    
International [member] | Plant and equipment [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 6,893 4,647  
Total lease assets 60 [2] 131  
Additions to lease assets [1]   90  
International [member] | Projects in development [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 7,655 9,795 [3]  
International [member] | Exploration [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation 59 121 [1]  
International [member] | Evaluation [member]      
Disclosure of operating segments [line items]      
Additions to exploration and evaluation 108 100 [1]  
International [member] | Restoration [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties 188 (28) [1],[4]  
International [member] | Oil And Gas Properties [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties 2,000 1,560 [1]  
International [member] | Capitalised borrowings costs [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties 123 [5] 179 [1],[6]  
International [member] | Americas [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 76 240  
International [member] | Africa [member]      
Disclosure of operating segments [line items]      
Total exploration and evaluation 24 38  
Marketing [member]      
Disclosure of operating segments [line items]      
Total lease assets 539    
Additions to lease assets 114    
Marketing [member] | Plant and equipment [member]      
Disclosure of operating segments [line items]      
Total lease assets [2] 539    
Additions to lease assets 114    
Corporate/Other [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 442 285  
Total lease assets 252 719  
Additions to oil and gas properties 190 92 [1]  
Additions to lease assets 8 9 [1]  
Corporate/Other [member] | Land and buildings [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties   1  
Total lease assets 245 264  
Additions to lease assets 8    
Corporate/Other [member] | Plant and equipment [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 198 161  
Total lease assets 7 [2] 455  
Additions to lease assets [1]   9  
Corporate/Other [member] | Projects in development [member]      
Disclosure of operating segments [line items]      
Total oil and gas properties 244 123 [3]  
Corporate/Other [member] | Oil And Gas Properties [member]      
Disclosure of operating segments [line items]      
Additions to oil and gas properties $ 190 $ 92 [1]  
[1] Additions exclude acquisitions through business combinations.
[2] In 2023, certain shipping activities, previously undertaken by the Corporate/Other segment, are now undertaken by the Marketing segment. As a result of this change, $539 million of lease assets are now reported within the Marketing segment as at 31 December 2023.
[3] Projects in development include the fair value ascribed to future phases of certain projects acquired through business combinations.
[4] Relates to changes in restoration provision assumptions.
[5] Borrowing costs capitalised were at a weighted average interest rate of 4.0%.
[6] Borrowing costs capitalised were at a weighted average interest rate of 3.8%.