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Subsidiaries - Summary of Financial Information of Subsidiaries with Material Non Controlling Interest (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Financial Information Of Subsidiaries With Material Noncontrolling Interest [Line Items]      
Current assets $ 5,118 $ 9,290  
Non-current assets 50,243 50,031  
Current liabilities (4,982) (6,608)  
Non-current liabilities (15,209) (15,586)  
Net assets 35,170 37,127  
Accumulated balance of NCI 771 791  
Revenue 13,994 16,817 $ 6,962
Profit after tax for the period 1,722 6,575 2,036
Profit allocated to NCI 62 77 53
Operating 6,145 8,811 3,792
Investing (5,585) (2,265) (2,941)
Financing (5,000) (3,364) (1,424)
Net increase/(decrease) in cash held (4,440) 3,182 (573)
Subsidiaries with material non-controlling interests [member] | Burrup Facilities Company Pty Ltd [member]      
Disclosure Of Financial Information Of Subsidiaries With Material Noncontrolling Interest [Line Items]      
Current assets 513 567 518
Non-current assets 5,020 5,047 5,038
Current liabilities (58) (68) (71)
Non-current liabilities (568) (528) (528)
Net assets 4,907 5,018 4,957
Accumulated balance of NCI 491 502 496
Revenue 839 889 858
Profit after tax for the period 400 489 328
Profit allocated to NCI 40 49 33
Dividends paid to NCI (51) (43) (40)
Operating 570 601 633
Investing (58) (45) (111)
Financing (512) (556) (522)
Net increase/(decrease) in cash held 0    
Subsidiaries with material non-controlling interests [member] | Burrup Train 1 Pty Ltd [member]      
Disclosure Of Financial Information Of Subsidiaries With Material Noncontrolling Interest [Line Items]      
Current assets 453 429 435
Non-current assets 2,806 2,900 2,915
Current liabilities (121) (119) (110)
Non-current liabilities (341) (325) (345)
Net assets 2,797 2,885 2,895
Accumulated balance of NCI 280 289 290
Revenue 1,393 1,471 1,421
Profit after tax for the period 222 282 200
Profit allocated to NCI 22 28 20
Dividends paid to NCI (31) (29) (27)
Operating 321 391 393
Investing (80) (55) (4)
Financing (241) $ (336) $ (389)
Net increase/(decrease) in cash held $ 0