Income statement analysis

12 Months Ended

Dec. 31, 2019

Analysis of income and expense [abstract]

Income statement analysis

Income statement analysis

					$ million
	2019		2018		2017
Interest and other income
Interest income from
Financial assets measured at amortized cost	371		421		288
Financial assets measured at fair value through profit or loss	49		39		—
Other income	349		313		369
	769		773		657
Currency exchange losses charged to the income statementa	37		368		83
Expenditure on research and development	364		429		391
Costs relating to the Gulf of Mexico oil spill (pre-interest and tax)b	319		714		2,687
Finance costs
Interest payable on lease liabilitiesc	379		51		56
Interest payable on other liabilities measured at amortized cost	2,410		2,147		1,662
Capitalized at 3.50% (2018 3.56% and 2017 2.25%)d	(374	)	(419	)	(297	)
Unwinding of discount on provisionse	505		210		150
Unwinding of discount on other payables measured at amortized cost	569		539		503
	3,489		2,528		2,074

^a  Excludes exchange gains and losses arising on financial instruments measured at fair value through profit or loss.

^b  Included within production and manufacturing expenses.

^c  Interest payable on lease liabilities in comparative periods relate to leases previously classified as finance leases under IAS 17.

^d  Tax relief on capitalized interest is approximately $51 million (2018$55 million and 2017$64 million).

^e From1 July 2018, the group changed its method of discounting and unwinding provisions from using real rates to using nominal rates.