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Restructuring costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Restructuring programmes |  |  |  |
Restructuring charges |  |  | $ 226 | $ 187
Total restructuring charges | $ 123 | $ 92 | 226 | 187
Cost of sales |  |  |  |
Restructuring programmes |  |  |  |
Restructuring charges | 14 | 23 | 52 | 55
Research and development expense |  |  |  |
Restructuring programmes |  |  |  |
Restructuring charges | 30 | 31 | 64 | 58
Selling, general and administrative costs |  |  |  |
Restructuring programmes |  |  |  |
Restructuring charges | $ 79 | 48 | $ 110 | 84
Other operating income and expense |  |  |  |
Restructuring programmes |  |  |  |
Reversal of provisions for cost of restructuring |  | $ (10) |  | $ (10)

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- Definition The amount of expense relating to restructuring net of reversals. + References No definition available. + Details
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- Definition n/a + References No definition available. + Details
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- Definition The amount of expense relating to restructuring. Restructuring is a programme that is planned and controlled by management and materially changes either the scope of a business undertaken by an entity or the manner in which that business is conducted. Such programmes include: (a) the sale or termination of a line of business; (b) closure of business locations in a country or region or the relocation of activities from one country or region to another; (c) changes in management structure; and (d) fundamental reorganisations that have a material effect on the nature and focus of the entity's operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 98 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of reversals of provisions for the cost of restructuring. [Refer: Restructuring provision] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 98 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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