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Goodwill and Intangible Assets (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Goodwill | $ 23.2 | $ 23.2
Intangible assets | 21.6 | 25.5
Intellectual property |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | 0.0 | 0.0
Other intangible assets |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | 10.4 | 15.9
Computer software assets |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | 11.2 | 9.6
Cost |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Goodwill | 78.6 | 78.6
Intangible assets | 633.6 | 632.4
Cost | Intellectual property |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | 111.3 | 111.3
Cost | Other intangible assets |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | 237.0 | 237.0
Cost | Computer software assets |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | 285.3 | 284.1
Accumulated Amortization and Impairment |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Goodwill | (55.4) | (55.4)
Intangible assets | (612.0) | (606.9)
Accumulated Amortization and Impairment | Intellectual property |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | (111.3) | (111.3)
Accumulated Amortization and Impairment | Other intangible assets |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | (226.6) | (221.1)
Accumulated Amortization and Impairment | Computer software assets |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets | $ (274.1) | $ (274.5)

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- Definition The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B67_d&doctype=Appendix&seq=2 -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_134_a&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_135_a&doctype=Standard -URIDate 2017-03-09 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_c&doctype=Standard -URIDate 2017-03-09 + Details
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