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Employee Benefits - Schedule Of Main Actuarial Assumptions Of Defined Benefit Plans (Detail) - Defined benefit plans | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
ITALY |  |
Disclosure Of Detailed Information About Employee Benefits [Line Items] |  |
Discount rate |  | 0.44%
Inflation rate |  | 1.75%
Salary increase rate | 2.55% | 2.81%
ITALY | Top of range |  |
Disclosure Of Detailed Information About Employee Benefits [Line Items] |  |
Average duration of plan (years) | 17 years 5 months 19 days | 14 years 10 months 24 days
Discount rate | 3.86% |
Inflation rate | 4.53% |
ITALY | Bottom of range |  |
Disclosure Of Detailed Information About Employee Benefits [Line Items] |  |
Average duration of plan (years) | 8 years 6 months | 9 years 9 months 18 days
Discount rate | 3.01% |
Inflation rate | 2.59% |
AUSTRIA |  |
Disclosure Of Detailed Information About Employee Benefits [Line Items] |  |
Salary increase rate |  | 2.30%
AUSTRIA | Top of range |  |
Disclosure Of Detailed Information About Employee Benefits [Line Items] |  |
Average duration of plan (years) | 11 years | 13 years 2 months 12 days
Discount rate | 4.16% | 1.23%
Salary increase rate | 7.50% |
AUSTRIA | Bottom of range |  |
Disclosure Of Detailed Information About Employee Benefits [Line Items] |  |
Average duration of plan (years) | 7 years 7 months 6 days | 9 years 1 month 6 days
Discount rate | 4.09% | 0.99%
Salary increase rate | 3.00% |

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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 2022-03-24 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_144&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The expected rate of inflation that is 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 2022-03-24 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_144&doctype=Standard -URIDate 2022-03-24 + 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 2022-03-24 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_144&doctype=Standard -URIDate 2022-03-24 + 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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- Definition The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 147 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_147_c&doctype=Standard -URIDate 2022-03-24 + Details
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