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Additional disclosure items G.2.1. Capital commitments (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Capital Commitments [Line Items]
Capital commitments	$ 154	$ 194
1 year
Capital Commitments [Line Items]
Capital commitments	126	182
Joint ventures
Capital Commitments [Line Items]
Capital commitments	66	25
Joint ventures | 1 year
Capital Commitments [Line Items]
Capital commitments	$ 56	$ 23

X

- Definition

The amount of future capital expenditures that the entity is committed to make.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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X

- Definition

[Line Items] for Capital Commitments [Table]

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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