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Provisions - Summary of Provisions (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about provisions [line items]    
Beginning Balance $ 2,824 $ 2,907
Acquisitions through business combination 4,804  
Change in provision (559) (112)
Unwinding of present value discount 110 29
Ending Balance 7,179 2,824
Current 1,219 605
Non-current 5,960 2,219
Net carrying amount 7,179 2,824
Restoration [member]    
Disclosure of detailed information about provisions [line items]    
Beginning Balance [1] 2,218 2,134
Acquisitions through business combination [1] 4,310  
Change in provision [1] (382) 60
Unwinding of present value discount [1] 107 24
Ending Balance [1] 6,253 2,218
Current [1] 575 235
Non-current [1] 5,678 1,983
Net carrying amount [1] 6,253 2,218
Employee benefits [member]    
Disclosure of detailed information about provisions [line items]    
Beginning Balance 286 295
Acquisitions through business combination 329  
Change in provision (98) (9)
Unwinding of present value discount 0  
Ending Balance 517 286
Current 331 269
Non-current 186 17
Net carrying amount 517 286
Onerous contracts [member]    
Disclosure of detailed information about provisions [line items]    
Beginning Balance [2] 214 349
Acquisitions through business combination [2] 0  
Change in provision [2] (216) (140)
Unwinding of present value discount [2] 2 5
Ending Balance [2] 0 214
Current [2] 0  
Non-current [2] 0 214
Net carrying amount [2] 0 214
Other [member]    
Disclosure of detailed information about provisions [line items]    
Beginning Balance 106 129
Acquisitions through business combination 165  
Change in provision 137 (23)
Unwinding of present value discount 1  
Ending Balance 409 106
Current 313 101
Non-current 96 5
Net carrying amount $ 409 $ 106
[1] 2022 change in provision is due to a revision of discount rates of $978 million (primarily due to an increase in risk free rates) and provisions used of $262 million, offset by changes in estimates of $858 million. Changes in estimates are due to new activities, increase in scope of removal and cost and rate escalations supported by the most recent estimates and benchmarks.
[2] 2022 change in provision is due to changes in estimates of $245 million offset by provisions used of $29 million.