Employment Benefits - Summary of Principal Assumptions on Actuarial Valuation (Details) - yr	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Statement [Line Items]
Future salary and benefit levels	4.28%	4.28%
Weighted average duration	10.39	10.77
Bottom of range [member]
Statement [Line Items]
Discount rate	2.51	1.87
Top of range [member]
Statement [Line Items]
Discount rate	2.60	2.12

The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2021-01-01
-Paragraph 144
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_144&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant