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Finance Lease Liabilities - Summary of Finance Lease Liabilities (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of finance lease liabilities [line items] |  |  |
Interest expense | $ (0.2) | $ 0.0 | $ 0.0
Balance at the end of the year | 111.5 |  |
Current portion of finance lease liability | 8.5 | 0.0 |
Non-current portion of finance lease liability | 80.1 | 0.0 |
Gruyere power purchase agreement [member] |  |  |
Disclosure of finance lease liabilities [line items] |  |  |
Balance at the beginning of the year | 0.0 | 0.0 |
Additions1 | 96.2 | 0.0 |
Interest expense | 0.2 | 0.0 |
Repayments | (2.5) | 0.0 |
Translation adjustment | (5.3) | 0.0 |
Balance at the end of the year | 88.6 | 0.0 | $ 0.0
Current portion of finance lease liability | (8.5) | 0.0 |
Non-current portion of finance lease liability | 80.1 | 0.0 |
Future minimum lease payments | 111.5 | 0.0 |
Interest | 22.9 | 0.0 |
Present value of minimum lease payments | 88.6 | 0.0 |
Within one year [member] |  |  |
Disclosure of finance lease liabilities [line items] |  |  |
Balance at the end of the year | 11.6 |  |
Within one year [member] | Gruyere power purchase agreement [member] |  |  |
Disclosure of finance lease liabilities [line items] |  |  |
Future minimum lease payments | 11.6 | 0.0 |
Interest | 3.1 | 0.0 |
Present value of minimum lease payments | 8.5 | 0.0 |
Later than one years and not later than five years [member] | Gruyere power purchase agreement [member] |  |  |
Disclosure of finance lease liabilities [line items] |  |  |
Future minimum lease payments | 41.5 | 0.0 |
Interest | 11.5 | 0.0 |
Present value of minimum lease payments | 30.0 | 0.0 |
Later than five years [member] |  |  |
Disclosure of finance lease liabilities [line items] |  |  |
Balance at the end of the year | 58.4 |  |
Later than five years [member] | Gruyere power purchase agreement [member] |  |  |
Disclosure of finance lease liabilities [line items] |  |  |
Future minimum lease payments | 58.4 | 0.0 |
Interest | 8.3 | 0.0 |
Present value of minimum lease payments | $ 50.1 | $ 0.0 |

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- Definition Disclosure of finance lease liabilities [line items] + References No definition available. + Details
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- Definition Finance lease capital repayments due. + References No definition available. + Details
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- Definition Foreign currency translation adjustment on finance leases. + References No definition available. + Details
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- Definition The portion of lease payments recognised as an expense that is not fixed in amount but is based on the future amount of a factor that changes other than with the passage of time (for example, percentage of future sales, amount of future use, future price indices, future market rates of interest). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 35 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_35_c&doctype=Standard&book=b -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 31 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_31_c&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount of current finance lease liabilities. [Refer: Finance lease liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2019-01-01 -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-02&anchor=para_55&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount of liabilities related to finance leases. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2019-01-01 -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-02&anchor=para_55&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount representing the difference between the future minimum finance lease payments and their present value. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 31 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_31_b&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The increase (decrease) in the net investment in finance lease. [Refer: Net investment in finance lease] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 93 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_93&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of interest expense on finance leases. [Refer: Interest expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2019-01-01 -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-02&anchor=para_112_c&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The present value of minimum finance lease payments payable. [Refer: Minimum finance lease payments payable] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 31 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_31_b&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount of non-current finance lease liabilities. [Refer: Finance lease liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2019-01-01 -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-02&anchor=para_55&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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