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Summary of Significant Accounting Policies - Intangible and Leased Assets - Additional Information (Detail) - Not internally generated [member]	12 Months Ended
	Dec. 31, 2019
Bottom of range [member] | Client relationships [member]
Disclosure of detailed information about intangible assets [line Items]
Estimated lives	10 years
Bottom of range [member] | Contract backlog and finite trademarks [member]
Disclosure of detailed information about intangible assets [line Items]
Estimated lives	1 year
Top of range [member] | Client relationships [member]
Disclosure of detailed information about intangible assets [line Items]
Estimated lives	15 years
Top of range [member] | Contract backlog and finite trademarks [member]
Disclosure of detailed information about intangible assets [line Items]
Estimated lives	3 years

X

- 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 life, measured as period of time, 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 2019-01-01
-Paragraph 118
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_a&doctype=Standard
-URIDate 2019-03-27

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