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Consolidated Statement Of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from/(used in) operating activities      
Profit/(loss) after tax for the period $ 6,575 $ 2,036 $ (3,975)
Non-cash items      
Depreciation and amortisation 2,808 1,582 1,730
Depreciation of lease assets 140 108 94
Change in fair value of derivative financial instruments 960 31 31
Net finance costs 12 203 269
Tax expense/(benefit) 2,599 1,254 (1,465)
Exploration and evaluation written off 164 265 2
Impairment losses   10 5,269
Impairment reversals (900) (1,058)  
Restoration movement 272 68 28
Gain on disposal of oil and gas properties (including revaluation gain) (494)    
Onerous contracts provision (245) (95) 347
Other (254) 30 (12)
Changes in assets and liabilities      
(Increase)/decrease in trade and other receivables (77) (39) 41
(Increase)/decrease in inventories (146) (4) 51
Increase in lease assets   (16)  
Increase/(decrease) in provisions 131 (75) 155
(Decrease)/increase in lease liabilities (31) (25) 40
Increase in other assets and liabilities (961) (128) (137)
Increase/(decrease) in trade and other payables 184 75 (121)
Cash generated from operations 10,737 4,222 2,347
Purchases of shares and payments relating to employee share plans (45) (47) (32)
Interest received 108 11 64
Dividends received 19 6 4
Borrowing costs relating to operating activities (21) (91) (180)
Income tax and PRRT paid (1,218) (271) (331)
Payments for restoration (263) (38) (23)
Payments for hedge collateral (506)    
Net cash from operating activities 8,811 3,792 1,849
Cash flows from/(used in) investing activities      
Cash received on acquisition of BHPP, including cash acquired 1,082    
Payments for capital and exploration expenditure (3,136) (2,406) (1,418)
Borrowing costs relating to investing activities (287) (126) (57)
Advances to other external entities (48) (206) (110)
Proceeds from disposal of non-current assets 132 9  
Funding of equity accounted investments (8)    
Payments for acquisition of joint arrangements   (212) (527)
Net cash used in investing activities (2,265) (2,941) (2,112)
Cash flows from/(used in) financing activities      
Proceeds from borrowings     600
Repayment of borrowings (283) (784) (83)
Borrowing costs relating to financing activities (18) (15) (21)
Repayment of the principal portion of lease liabilities (248) (155) (71)
Borrowing costs relating to lease liabilities (10) (89) (86)
Purchases of shares and payments relating to Dividend Reinvestment Plan (144)    
Contributions to non-controlling interests (98) (92) (111)
Dividends paid (net of Dividend Reinvestment Plan) (2,558) (289) (454)
Net (payments)/proceeds from share issuance (5)   23
Net cash used in financing activities (3,364) (1,424) (203)
Net increase/(decrease) in cash held 3,182 (573) (466)
Cash and cash equivalents at the beginning of the period 3,025 3,604 4,058
Effects of exchange rate changes (6) (6) 12
Cash and cash equivalents at the end of the period $ 6,201 $ 3,025 $ 3,604