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Supplemental financial information - Property, plant and equipment at cost (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost | $ 4,923 | $ 5,465
Land |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost | 127 | 127
Buildings and improvements |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost | $ 2,753 | 2,789
Buildings and improvements | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost, depreciable lives | 5 years |
Buildings and improvements | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost, depreciable lives | 40 years |
Machinery and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost | $ 2,043 | $ 2,549
Machinery and equipment | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost, depreciable lives | 2 years |
Machinery and equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment at cost, depreciable lives | 10 years |

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Details
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- Details
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- Details
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