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Retirement Benefit Plans - Summary of Key Assumptions Used for the Actuarial Valuations (Detail) | Dec. 31, 2021 | Dec. 31, 2020
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Bottom of range [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rates | 0.05% | 0.00%
Expected rates of salary increase | 1.00% | 1.00%
Top of range [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rates | 3.31% | 2.77%
Expected rates of salary increase | 4.02% | 4.06%

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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References 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 + Details
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- Definition 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]] + References 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 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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- Details
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