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Goodwill Impairment Analysis, Projected Increase (Decrease) in Measurement Input

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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.

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Percentage of fair value of reporting unit in excess of carrying amount.

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Goodwill and other intangible assets - Additional Information (Details) - USD ($)	1 Months Ended		3 Months Ended	12 Months Ended
	Nov. 30, 2022	Jan. 31, 2022	Oct. 02, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 28, 2022	Jan. 26, 2022
Goodwill [Line Items]
Goodwill, impairment loss			$ 0
Goodwill				$ 1,675,311,000	$ 1,324,501,000
Aggregate amortization expense				80,445,000	$ 49,419,000	$ 52,899,000
Amortization expense on other intangible assets in 2023				80,900,000
Amortization expense on other intangible assets in 2024				74,100,000
Amortization expense on other intangible assets in 2025				63,600,000
Amortization expense on other intangible assets in 2026				60,400,000
Amortization expense on other intangible assets in 2027				59,000,000
Metalpack Packaging
Goodwill [Line Items]
Goodwill				337,111,000				$ 366,098,000
Skjern
Goodwill [Line Items]
Goodwill							$ 29,059,000
Customer Lists and Patents \| Metalpack Packaging
Goodwill [Line Items]
Intangible assets acquired		$ 498,000,000
Useful lives of intangible asset		14 years
Customer Lists and Patents \| Skjern
Goodwill [Line Items]
Intangible assets acquired	$ 42,818,000
Useful lives of intangible asset	14 years
Plastics - Healthcare
Goodwill [Line Items]
Goodwill				$ 62,607,000
Excess of fair value of reporting unit over carrying value (percent)			18.00%
Plastics - Healthcare \| Discount Rate
Goodwill [Line Items]
Discount rate (percent)			9.80%
Change necessary in order for estimated fair value to fall below carrying value (percent)				11.00%
Protexic
Goodwill [Line Items]
Goodwill				$ 29,051,000
Excess of fair value of reporting unit over carrying value (percent)				18.30%
Protexic \| Discount Rate
Goodwill [Line Items]
Discount rate (percent)			9.50%
Change necessary in order for estimated fair value to fall below carrying value (percent)				11.50%