Retirement plans - Asset allocation (Details)	Dec. 31, 2022	Dec. 31, 2021
Employee Benefits [Abstract]
Equity securities	20.00%	19.00%
Debt securities	49.00%	54.00%
Cash and other short-term securities	31.00%	27.00%
Total	100.00%	100.00%

The percentage cash and cash equivalents contribute to the fair value of defined benefit plan assets. [Refer: Cash and cash equivalents; Plan assets, at fair value; Defined benefit plans [member]] [Contrast: Cash and cash equivalents, amount contributed to fair value of plan assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2022-03-24
-Paragraph 142
-Subparagraph a
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-URIDate 2022-03-24

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- Definition

The percentage instruments representing debt (rather than equity) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] [Contrast: Debt instruments, amount contributed to fair value of plan assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2022-03-24
-Paragraph 142
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_142_c&doctype=Standard
-URIDate 2022-03-24

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- Definition

The percentage equity instruments contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] [Contrast: Equity instruments, amount contributed to fair value of plan assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2022-03-24
-Paragraph 142
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_142_b&doctype=Standard
-URIDate 2022-03-24

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- Definition

Employee Benefits [Abstract]

+ References

No definition available.

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- Definition

Plan Assets At Fair Value, Allocation Percentage

+ References

No definition available.

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