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Other investments (Tables)

12 Months Ended

Dec. 31, 2017

Financial Instruments [Abstract]

Schedule of other investments



								$ million
				2017				2016
		Current		Non-current		Current		Non-current
Equity investments^a		15		418		2		405
Other		110		827		42		628
		125		1,245		44		1,033


^a	The majority of equity investments are unlisted.