Changes in the Group structure - Major business combinations, Lapa and Iara concessions (Details) - Transfer of rights in the Lapa and Iara Concessions in Brazil $ in Millions	Jan. 15, 2018 USD ($) bbl / d
Lapa and Iara concessions
Major business combinations
Acquisition cost	$ 1,950
Provisional purchase price allocation
Intangible assets	1,072
Tangible assets	1,662
Other assets and liabilities	(119)
Net debt	(665)
Fair value of consideration transferred	$ 1,950
Lapa field
Major business combinations
Percentage of rights acquired	35.00%
FPSO capacity (in barrels per day) \| bbl / d	100,000
Iara area
Major business combinations
Percentage of rights acquired	22.50%

The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

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The amount recognised as of the acquisition date for borrowings assumed in a business combination. [Refer: Borrowings; Business combinations [member]]

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The amount recognised as of the acquisition date for net identifiable assets acquired or liabilities assumed in a business combination. [Refer: Business combinations [member]]

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The amount recognised as of the acquisition date for identifiable intangible assets acquired in a business combination. [Refer: Intangible assets other than goodwill; Business combinations [member]]

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The amount recognised as of the acquisition date for plant, property and equipment acquired in a business combination. [Refer: Property, plant and equipment; Business combinations [member]]

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The floating production storage and offloading capacity of the joint operation.

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The amount recognised as of the acquisition date for net other assets and liabilities acquired in a business combination.

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The percentage of concession rights acquired in a business combination.

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