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Joint Arrangements - Summary of Interest Percentage in Joint Operations (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
North West Shelf [member] | Producing and developing assets [member] | Australia [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 25.00% | 12.50%
North West Shelf [member] | Producing and developing assets [member] | Australia [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 66.70% | 50.00%
Greater Enfield and Vincent [Member] | Producing and developing assets [member] | Australia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 60.00% | 60.00%
Stybarrow [Member] | Producing and developing assets [member] | Australia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation |  | 50.00%
Balnaves [Member] | Producing and developing assets [member] | Australia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 65.00% | 65.00%
Pluto [member] | Producing and developing assets [member] | Australia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 90.00% | 90.00%
Wheatstone [member] | Producing and developing assets [member] | Australia [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 13.00% | 13.00%
Wheatstone [member] | Producing and developing assets [member] | Australia [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 65.00% | 65.00%
Scarborough [member] | Producing and developing assets [member] | Australia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation |  | 73.50%
Scarborough [member] | Exploration and evaluation assets [member] | Oceania [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation |  | 50.00%
Macedon [member] | Producing and developing assets [member] | Australia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 71.40% |
Bass Strait [member] | Producing and developing assets [member] | Australia [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 25.00% |
Bass Strait [member] | Producing and developing assets [member] | Australia [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 50.00% |
Pyrenees [Member] | Producing and developing assets [member] | Australia [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 40.00% |
Pyrenees [Member] | Producing and developing assets [member] | Australia [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 71.40% |
Griffin [Member] | Producing and developing assets [member] | Australia [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 45.00% |
Griffin [Member] | Producing and developing assets [member] | Australia [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 71.00% |
Minerva [Member] | Producing and developing assets [member] | Australia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 90.00% |
Sangomar [member] | Producing and developing assets [member] | International [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 82.00% | 82.00%
Atlantis [member] | Producing and developing assets [member] | International [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 44.00% |
Mad Dog [Member] | Producing and developing assets [member] | International [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 23.90% |
Shenzi [member] | Producing and developing assets [member] | International [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 72.00% |
Trion [member] | Producing and developing assets [member] | International [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 60.00% |
Greater Angostura [member] | Producing and developing assets [member] | International [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 45.00% |
Greater Angostura [member] | Producing and developing assets [member] | International [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 68.50% |
Calypso [member] | Producing and developing assets [member] | International [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 70.00% |
Browse Basin [Member] | Exploration and evaluation assets [member] | Oceania [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 30.60% | 30.60%
Carnarvon Basin [Member] | Exploration and evaluation assets [member] | Oceania [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 31.60% | 15.80%
Carnarvon Basin [Member] | Exploration and evaluation assets [member] | Oceania [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 70.00% | 70.00%
Bonaparte Basin [Member] | Other joint operations [Member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 21.00% |
Bonaparte Basin [Member] | Exploration and evaluation assets [member] | Oceania [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 26.70% | 26.70%
Bonaparte Basin [Member] | Exploration and evaluation assets [member] | Oceania [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 35.00% | 35.00%
Congo [member] | Exploration and evaluation assets [member] | Africa [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 22.50% | 42.50%
Senegal [member] | Exploration and evaluation assets [member] | Africa [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 90.00% | 90.00%
Egypt [member] | Exploration and evaluation assets [member] | Africa [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 25.00% |
Egypt [member] | Exploration and evaluation assets [member] | Africa [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 45.00% |
US Gulf of Mexico [member] | Exploration and evaluation assets [member] | Americas [Member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 23.90% |
US Gulf of Mexico [member] | Exploration and evaluation assets [member] | Americas [Member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 75.00% |
Kitimat [Member] | Exploration and evaluation assets [member] | Americas [Member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 50.00% | 50.00%
Republic Of Korea [member] | Exploration and evaluation assets [member] | Asia [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 50.00% | 50.00%
Myanmar [member] | Exploration and evaluation assets [member] | Asia [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 40.00% | 40.00%
Myanmar [member] | Exploration and evaluation assets [member] | Asia [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 45.00% | 50.00%
Barbados [member] | Exploration and evaluation assets [member] | Caribbean [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 60.00% |
Trinidad & Tobago [member] | Exploration and evaluation assets [member] | Caribbean [member] | Bottom of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 65.00% |
Trinidad & Tobago [member] | Exploration and evaluation assets [member] | Caribbean [member] | Top of range [member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 70.00% |
Angel [Member] | Other joint operations [Member] |  |
Disclosure of joint operations [line items] |  |
Proportion of ownership interest in joint operation | 20.00% |

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