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Consolidated Statement of Cash Flows (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement [Line Items] |  |  |  |
Purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets | [1] | $ 102.6 | $ 64.1 | $ 62.8
Unpaid purchases of property, plant and equipment |  | 18.5 | 22.6 | 11.2
Finance Lease Obligations |  |  |  |
Statement [Line Items] |  |  |  |
Purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets |  | $ 5.0 | $ 3.4 | $ 19.0
[1] | Additional equipment of $5.0 was acquired through finance leases in 2017 (2016 — $3.4; 2015 —$19.0). See notes 4, 8 and 12. Unpaid purchases of property, plant and equipment at December 31, 2017 were $18.5 (December 31, 2016 — $22.6; December 31, 2015 — $11.2).

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- Definition The cash outflow for the purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets. [Refer: Intangible assets other than goodwill; Investment property; Other non-current assets; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_16&doctype=Standard -URIDate 2017-03-09 + Details
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