The aggregate cash flows arising from losing control of subsidiaries or other businesses, classified as investing activities. [Refer: Subsidiaries [member]]

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The cash outflow to acquire equity or debt instruments of other entities (other than payments for those instruments considered to be cash equivalents or those held for dealing or trading purposes), classified as investing activities.

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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No definition available.

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Amount of a capital increase subscribed to by the entity for the acquisition of interest in another entity.

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The proportion of ownership interest in a joint operation sold by the entity during the period.

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Changes in the Group structure - Main acquisitions and divestments (Details) € in Millions, $ in Millions		1 Months Ended			4 Months Ended	12 Months Ended
	Jan. 31, 2017 USD ($)	Nov. 30, 2017	Sep. 30, 2017 EUR (€)	Jan. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Main acquisitions and divestments
Amount paid for acquisition of interest						$ 1,368	$ 180	$ 513
Amount of sale						$ 2,909	$ 270	$ 2,508
Atotech
Main acquisitions and divestments
Amount of sale	$ 3,200
Tellurian Investments Inc
Main acquisitions and divestments
Interest acquired (as a percent)				23.00%
Amount paid for acquisition of interest				$ 207
Total Eren Holding SA
Main acquisitions and divestments
Interest acquired (as a percent)			23.00%
Subscription to capital increase for acquisition of indirect stake \| €			€ 238
Amount paid for acquisition of interest \| €					€ 119
Gina Krog field in Norway
Main acquisitions and divestments
Remaining interest sold (as a percent)		15.00%				15.00%