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Critical Accounting Estimates and Significant Judgements - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Disclosure of changes in accounting estimates [abstract]
Contract estimated costs and revenue	$ 127.2
Estimation of lower percentage of total cost of work in progress	10.00%
Estimation of higher percentage of total cost of work in progress	10.00%
Estimation of revenue recognition increased	$ 385.9
Estimation of revenue recognition decreased	425.7
Higher or lower of deferred tax expense	$ 148.2
Percentage of devaluation or appreciation against dollar in relation to actual exchange	10.00%

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- Definition

Contract estimated costs and revenue.

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- Definition

Estimation of higher percentage of cost of work in progress.

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- Definition

Estimation of lower percentage of cost of work in progress.

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- Definition

Estimation of revenue recognition decreased.

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- Definition

Estimation of revenue recognition increased.

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- Definition

Percentage of devaluated or appreciated against dollar in relation to actual exchange.

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- Definition

Adjustments for deferred tax expense to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Deferred tax expense (income); Profit (loss)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 20
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_20&doctype=Standard
-URIDate 2018-03-16

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