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Employee Benefits - Additional Information (Detail) - Employee
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2021
Dec. 31, 2020
WEP [member]      
Disclosure of employee benefits [line items]      
Description of vesting requirements for share based payment arrangement For awards made in and subsequent to 2022, participants are entitled to receive a Woodside share on the vesting date, three years after the grant date. Awards made in 2021 and 2020 will vest under the terms of the plan at that time, which provided for 75% vesting of the ERs three years after the grant date and the remaining 25% of the ERs five years after the grant date. Awards made in 2021 and 2020 will vest under the terms of the plan at that time, which provided for 75% vesting of the ERs three years after the grant date and the remaining 25% of the ERs five years after the grant date.
SWEP [member]      
Disclosure of employee benefits [line items]      
Description of vesting requirements for share based payment arrangement Each ER entitles the participant to receive a Woodside share on vesting date. Participants do not make any payment in respect of the ERs at grant or at vesting.    
SWEP [member] | Woodside share or American Depositary share [Member]      
Disclosure of employee benefits [line items]      
Description of vesting requirements for share based payment arrangement Each ER entitles the participant to receive a Woodside share on the vesting date three years after the grant date.    
Top of range [member] | Key management personnel of entity or parent [member]      
Disclosure of employee benefits [line items]      
Number of employees 6    
Bottom of range [member] | Key management personnel of entity or parent [member]      
Disclosure of employee benefits [line items]      
Number of employees 4