Inventory valuation	6 Months Ended
Jun. 30, 2020
Disclosure of inventories [Abstract]
Disclosure of inventories [text block]	Inventory valuation A provision of $289 million was held against hydrocarbon inventories at 30 June 2020 ($290 million at 31 December 2019) to write them down to their net realizable value.

The entire disclosure for inventories.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 2
-IssueDate 2019-01-01
-Section Disclosure
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2019-en-r&doctype=Standard&dita_xref=IAS02_g36-39_TI
-URIDate 2019-03-27

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