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Derivative financial instruments - Narratives (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024	Dec. 28, 2024
Derivatives not designated as hedging instruments
Derivative
Gains on derivative, recognized in the income statement		$ (300,000)	$ 1,100,000	$ 1,100,000	$ 3,200,000
Currency swap | Net Investment Hedges
Derivative
Notional amount		820,000,000		820,000,000
Currency swap | Net Investment Hedges | Derivatives designated as hedging instruments
Derivative
Notional amount		1,890,000,000		1,890,000,000		$ 1,320,000,000
Gains on derivative, recognized in the income statement		$ 5,700,000	$ 1,100,000	10,500,000	$ 4,300,000
Currency swap | Net Investment Hedges | Derivatives designated as hedging instruments | Minimum
Derivative
Derivative, term of contract		3 years
Currency swap | Net Investment Hedges | Derivatives designated as hedging instruments | Maximum
Derivative
Derivative, term of contract		5 years
Interest rate swaps | Net Investment Hedges | Derivatives designated as hedging instruments
Derivative
Notional amount	$ 470,000,000
Derivative, term of contract	5 years
Interest Rate Swap II | Net Investment Hedges | Derivatives designated as hedging instruments
Derivative
Notional amount	$ 230,000,000
—Currency forward contracts | Derivatives not designated as hedging instruments
Derivative
Notional amount		$ 200,000		$ 200,000		$ 147,500,000

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-SubTopic 10
-Topic 825
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-10

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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