Financial instruments - Foreign exchange gains and losses recognized within AOCI and the interest benefit recognized within interest expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2025	Mar. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange (loss) gain	$ 26,289	$ (36,669)
Interest benefit	4,239	3,720
Cross-currency interest rate swaps \| Not designated as hedging instrument
Derivative Instruments, Gain (Loss) [Line Items]
Interest benefit	4,239	3,720
Cross-currency interest rate swaps \| Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange (loss) gain	$ (22,499)	$ 8,893

Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.