Investments in securities (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Measurement [Abstract]

Schedule of Investments in Securities


			$ million
			Dec 31, 2023			Dec 31, 2022
Equity securities:			1,605			1,533
Equity securities at fair value through other comprehensive income			1,605			1,533
Debt securities:			1,641			1,829
Debt securities at amortised cost			28			21
Debt securities at fair value through other comprehensive income			1,285			1,308
Debt securities at fair value through profit or loss			328			500
Total			3,246			3,362
At fair value
Measured by reference to prices in active markets for identical assets			1,983			1,884
Measured by reference to other observable inputs			92			158
Measured using predominantly unobservable inputs			1,143			1,299
Total			3,218			3,341
At cost			28			21
Total			3,246			3,362

Schedule of Investments in Securities Using Predominantly Unobservable Inputs


			$ million
			2023			2022
At January 1			1,299			1,707
Losses recognised in other comprehensive income			(126)			(206)
Purchases			146			142
Sales			(207)			(37)
Other movements			31			(307)
At December 31			1,143			1,299

[A]Based on expected dividend flows, adjusted for country and other risks as appropriate and discounted to their present value.