Operating leases (Tables)

12 Months Ended

Dec. 31, 2017

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Summary of Future Minimum Lease Payments Under Non-cancellable Operating Leases

Future minimum lease payments under non-cancellable operating leases are as follows:

	2017 $m		2016 $m
Due within one year		56		53
One to two years		46		49
Two to three years		45		43
Three to four years		60		41
Four to five years		30		58
More than five years		297		346
		534		590