Other investments (Tables)

12 Months Ended

Dec. 31, 2019

Financial Instruments [Abstract]

Schedule of other investments

				$ million
		2019		2018
	Current	Non-current	Current	Non-current
Equity investmentsa	—	571	1	482
Other	169	705	221	859
	169	1,276	222	1,341

^a  The majority of equity investments are unlisted.