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CONSOLIDATED INCOME STATEMENTS (unaudited) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Profit or loss [abstract] |  |  |  |
Net sales to third parties | $ 1,863 | $ 1,819 | $ 3,640 | $ 3,598
Sales to former parent | 0 | 1 | 0 | 2
Other revenues | 40 | 0 | 87 | 0
Net sales and other revenues | 1,903 | 1,820 | 3,727 | 3,600
Cost of net sales | (922) | (942) | (1,847) | (1,855)
Cost of other revenues | (34) | 0 | (81) | 0
Gross profit | 947 | 878 | 1,799 | 1,745
Selling, general & administration | (760) | (722) | (1,416) | (1,375)
Research & development | (167) | (152) | (313) | (289)
Other income | 6 | 62 | 18 | 81
Other expense | (79) | (28) | (189) | (51)
Operating (loss)/income | (53) | 38 | (101) | 111
Interest expense | (35) | (6) | (44) | (12)
Other financial income & expense | (8) | (8) | (16) | (14)
(Loss)/income before taxes | (96) | 24 | (161) | 85
Taxes | (294) | (9) | (338) | (32)
Net (loss)/income | $ (390) | $ 15 | $ (499) | $ 53
(Loss)/earnings per share |  |  |  |
Basic earnings per share (in dollars per share) | $ (0.80) | $ 0.03 | $ (1.02) | $ 0.11
Diluted earnings per share (in dollars per share) | $ (0.80) | $ 0.03 | $ (1.02) | $ 0.11
Weighted average number of shares outstanding |  |  |  |
Weighted average number of shares outstanding - Basic (in shares) | 488.2 | 488.2 | 488.2 | 488.2
Weighted average number of shares outstanding - Diluted (in shares) | 488.2 | 488.2 | 488.2 | 488.2

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- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2018-01-01 -Paragraph 70 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=33&date=2018-03-01&anchor=para_70_b&doctype=Standard -URIDate 2018-03-16 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration