Principal accounting policies (Table)

12 Months Ended

Dec. 31, 2018


	US$bn
Operating lease commitments under IAS 17 per note 31	1.7
Exclude/deduct
Leases expiring in 12 months or fewer ^(a)	(0.1)
Committed leases not commenced ^(a)	(0.1)
Components excluded from the lease liability ^(a)	(0.2)
Include/add
Cost of reasonably certain extensions ^(a)	0.3
Other ^(b)	0.1
Sub total	1.7
Effect of discounting on payments included in the calculation of the lease liability (excluding finance lease balances)	(0.4)
Lease liability opening balance reported as at 1 January 2019 (IFRS 16)	1.3

(a)Undiscounted.

(b)Includes finance lease liabilities already reported under IAS 17. Refer to note 23.