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Summary of Significant Accounting Policies - Intangible and Leased Assets - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2018
Bottom of range [member] | Intangible under finance lease [member] |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 3 years
Bottom of range [member] | Client relationships [member] | Not internally generated [member] |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 10 years
Bottom of range [member] | Contract backlog and finite trademarks [member] | Not internally generated [member] |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 1 year
Top of range [member] | Intangible under finance lease [member] |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 7 years
Top of range [member] | Client relationships [member] | Not internally generated [member] |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 15 years
Top of range [member] | Contract backlog and finite trademarks [member] | Not internally generated [member] |
Disclosure of detailed information about intangible assets [line Items] |
Estimated lives | 3 years

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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. + Details
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- Definition The useful lives or amortisation rates used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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- Details
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- Details
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