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Goodwill and Intangible Assets - Goodwill (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 922.4	$ 923.5
Corrugated Products Facilities
Goodwill [Line Items]
Goodwill	0.1
Advance Packaging Corporation [Member]
Goodwill [Line Items]
Goodwill	$ 1.0	$ 923.5

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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