Capital management (Details) $ in Billions	3 Months Ended	12 Months Ended	39 Months Ended	48 Months Ended
Capital management (Details) $ in Billions	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024 USD ($) quarterWithShareBuyback	Dec. 31, 2028 USD ($)
Capital management [Line Items]
Number of consecutive quarters of share buybacks \| quarterWithShareBuyback			13
Bottom of range
Capital management [Line Items]
Value of each share buyback in consecutive quarters			$ 3
Forecast
Capital management [Line Items]
Dividend per share growth rate	4.00%	4.00%
Forecast \| Renewables and Energy Solutions
Capital management [Line Items]
Cash capital expenditure				$ 8
Forecast \| Bottom of range
Capital management [Line Items]
Cash capital expenditure				$ 20
Normalised free cash flow (nFCF) growth per share		0.10
Return on average capital employed (ROACE)				0.10
Shareholder distribution percentage		40.00%
Forecast \| Bottom of range \| Integrated Gas and Upstream
Capital management [Line Items]
Cash capital expenditure				$ 12
Forecast \| Top of range
Capital management [Line Items]
Cash capital expenditure				22
Shareholder distribution percentage		50.00%
Forecast \| Top of range \| Integrated Gas and Upstream
Capital management [Line Items]
Cash capital expenditure				$ 14