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Restructuring and other impairment charges - expected costs to be incurred (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
2016 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | $ 34 |
2016 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 44 |
2014 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 46 | $ 43
2014 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 51 | $ 48
Termination benefits | 2016 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 14 |
Termination benefits | 2016 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 15 |
Termination benefits | 2014 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 11 |
Termination benefits | 2014 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 12 |
Facility closure and other exit costs | 2016 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 2 |
Facility closure and other exit costs | 2016 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 3 |
Facility closure and other exit costs | 2014 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 1 |
Facility closure and other exit costs | 2014 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 2 |
Special Termination Benefits And Facility Closing | 2016 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 16 |
Special Termination Benefits And Facility Closing | 2016 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 18 |
Special Termination Benefits And Facility Closing | 2014 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 12 |
Special Termination Benefits And Facility Closing | 2014 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 14 |
Accelerated Depreciation Charges | 2016 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 16 |
Accelerated Depreciation Charges | 2016 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 18 |
Accelerated Depreciation Charges | 2014 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 34 |
Accelerated Depreciation Charges | 2014 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 37 |
Other | 2016 Manufacturing footprint realignment plan | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | 18 |
Other | 2016 Manufacturing footprint realignment plan | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Expected restructuring charges | $ 26 |

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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