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Employees' Leaving Entitlement - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Changes In Net Defined Benefit Liability Asset [Abstract]
Average duration of defined benefit plans	10 years	10 years

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- References

No definition available.

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- Definition

Average duration of defined benefit plans.

+ References

No definition available.

+ Details

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