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Property, Plant and Equipment - Changes to the Net Book Value (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |  |  |
Property, plant and equipment, beginning balance |  |  |  | $ 302,700,000 | $ 314,600,000 |
Additions |  |  |  | 94,900,000 | 77,200,000 |
Acquisitions through business combinations (note 3) |  |  |  |  | 1,100,000 |
Depreciation |  |  |  | (67,600,000) | (66,200,000) |
Write down of assets and other disposals |  |  |  | (5,500,000) | (23,700,000) |
Foreign exchange and other |  |  |  | (600,000) | (300,000) |
Property, plant and equipment, ending balance | $ 323,900,000 |  | $ 302,700,000 | 323,900,000 | 302,700,000 | $ 314,600,000
Impairment relating to write-down of equipment | 0 |  | 0 |  | 21,200,000 | 12,200,000
Assets recognized under finance leases | 7,300,000 |  | 8,200,000 | 7,300,000 | 8,200,000 |
Land |  |  |  |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |  |  |
Property, plant and equipment, beginning balance |  |  |  | 10,900,000 | 10,700,000 |
Additions |  |  |  | 0 | 0 |
Acquisitions through business combinations (note 3) |  |  |  |  | 0 |
Depreciation |  |  |  | 0 | 0 |
Write down of assets and other disposals |  |  |  | 0 | 0 |
Foreign exchange and other |  |  |  | 200,000 | 200,000 |
Property, plant and equipment, ending balance | 11,100,000 |  | 10,900,000 | 11,100,000 | 10,900,000 | 10,700,000
Buildings including improvements |  |  |  |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |  |  |
Property, plant and equipment, beginning balance |  |  |  | 140,100,000 | 141,700,000 |
Additions |  |  |  | 22,800,000 | 21,500,000 |
Acquisitions through business combinations (note 3) |  |  |  |  | 0 |
Depreciation |  |  |  | (21,300,000) | (19,900,000) |
Write down of assets and other disposals |  |  |  | (200,000) | (3,400,000) |
Foreign exchange and other |  |  |  | 200,000 | 200,000 |
Property, plant and equipment, ending balance | 141,600,000 |  | 140,100,000 | 141,600,000 | 140,100,000 | 141,700,000
Machinery and equipment |  |  |  |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |  |  |
Property, plant and equipment, beginning balance |  |  |  | 151,700,000 | 162,200,000 |
Additions |  |  |  | 72,100,000 | 55,700,000 |
Acquisitions through business combinations (note 3) |  |  |  |  | 1,100,000 |
Depreciation |  |  |  | (46,300,000) | (46,300,000) |
Write down of assets and other disposals |  |  |  | (5,300,000) | (20,300,000) |
Foreign exchange and other |  |  |  | (1,000,000) | (700,000) |
Property, plant and equipment, ending balance | 171,200,000 |  | $ 151,700,000 | 171,200,000 | $ 151,700,000 | $ 162,200,000
Solar panel manufacturing equipment |  |  |  |  |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |  |  |  |  |
Property, plant and equipment, ending balance | $ 4,800,000 |  |  | $ 4,800,000 |  |
Impairment relating to write-down of equipment |  | $ 5,200,000 |  |  |  |

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- Definition The increase in property, plant and equipment resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_iii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_vii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_75_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of impairment loss recognised in profit or loss. [Refer: Impairment loss; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 126 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_126_a&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 129 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_129_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_viii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_a&doctype=Standard -URIDate 2017-03-09 + Details
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