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Statutory accounts	6 Months Ended
Statutory accounts	Jun. 30, 2018
Disclosure of interim financial reporting [Abstract]
Statutory accounts	Statutory accounts The financial information shown in this publication, which was approved by the Board of Directors on 30 July 2018, is unaudited and does not constitute statutory financial statements. Audited financial information will be published in BP Annual Report and Form 20-F 2018.