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Acquisitions and divestitures - Summary of the Purchase Consideration Transferred for the Acquisitions (Details) - USD ($) $ in Thousands		12 Months Ended
	Sep. 08, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Cash consideration, net of cash acquired		$ 3,793,569	$ 372,616	$ 1,427,020
RTS Packaging and Chattanooga Mill
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ 313,388
Fair value of previously held interest in RTS Packaging	59,472
Final working capital settlement	452
Settlement of preexisting relationships	1,235
Purchase consideration transferred	$ 374,547

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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