Business combination - Trade receivable and Goodwill (Details) - DigitalGlobe - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Oct. 05, 2017
Business combination
Trade and other receivables, gross		$ 144.1
Estimated to be uncollectable		$ 1.9
Investment banking fees, legal, tax, consulting and other acquisition and integration costs	$ 59.9

The amount of acquisition-related costs recognised as an expense for transactions that are recognised separately from the acquisition of assets and the assumption of liabilities in business combinations. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph m
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_m&doctype=Appendix&seq=2
-URIDate 2017-03-09

+ Details

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- Definition

The best estimate at acquisition date of contractual cash flows not expected to be collected for receivables acquired in business combinations. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph h
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_h_iii&doctype=Appendix&seq=2
-URIDate 2017-03-09

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The gross contractual amounts receivable for receivables acquired in business combinations. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph h
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_h_ii&doctype=Appendix&seq=2
-URIDate 2017-03-09

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- Details

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